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/**
* Cesium - https://github.com/CesiumGS/cesium
*
* Copyright 2011-2020 Cesium Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Columbus View (Pat. Pend.)
*
* Portions licensed separately.
* See https://github.com/CesiumGS/cesium/blob/master/LICENSE.md for full licensing details.
*/
define(['exports', './when-8d13db60', './Check-70bec281', './RuntimeError-ba10bc3e'], function (exports, when, Check, RuntimeError) { 'use strict';
/**
* @license
*
* Grauw URI utilities
*
* See: http://hg.grauw.nl/grauw-lib/file/tip/src/uri.js
*
* @author Laurens Holst (http://www.grauw.nl/)
*
* Copyright 2012 Laurens Holst
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/**
* Constructs a URI object.
* @constructor
* @class Implementation of URI parsing and base URI resolving algorithm in RFC 3986.
* @param {string|URI} uri A string or URI object to create the object from.
*/
function URI(uri) {
if (uri instanceof URI) { // copy constructor
this.scheme = uri.scheme;
this.authority = uri.authority;
this.path = uri.path;
this.query = uri.query;
this.fragment = uri.fragment;
} else if (uri) { // uri is URI string or cast to string
var c = parseRegex.exec(uri);
this.scheme = c[1];
this.authority = c[2];
this.path = c[3];
this.query = c[4];
this.fragment = c[5];
}
}
// Initial values on the prototype
URI.prototype.scheme = null;
URI.prototype.authority = null;
URI.prototype.path = '';
URI.prototype.query = null;
URI.prototype.fragment = null;
// Regular expression from RFC 3986 appendix B
var parseRegex = new RegExp('^(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\\?([^#]*))?(?:#(.*))?$');
/**
* Returns the scheme part of the URI.
* In "http://example.com:80/a/b?x#y" this is "http".
*/
URI.prototype.getScheme = function() {
return this.scheme;
};
/**
* Returns the authority part of the URI.
* In "http://example.com:80/a/b?x#y" this is "example.com:80".
*/
URI.prototype.getAuthority = function() {
return this.authority;
};
/**
* Returns the path part of the URI.
* In "http://example.com:80/a/b?x#y" this is "/a/b".
* In "mailto:mike@example.com" this is "mike@example.com".
*/
URI.prototype.getPath = function() {
return this.path;
};
/**
* Returns the query part of the URI.
* In "http://example.com:80/a/b?x#y" this is "x".
*/
URI.prototype.getQuery = function() {
return this.query;
};
/**
* Returns the fragment part of the URI.
* In "http://example.com:80/a/b?x#y" this is "y".
*/
URI.prototype.getFragment = function() {
return this.fragment;
};
/**
* Tests whether the URI is an absolute URI.
* See RFC 3986 section 4.3.
*/
URI.prototype.isAbsolute = function() {
return !!this.scheme && !this.fragment;
};
///**
//* Extensive validation of the URI against the ABNF in RFC 3986
//*/
//URI.prototype.validate
/**
* Tests whether the URI is a same-document reference.
* See RFC 3986 section 4.4.
*
* To perform more thorough comparison, you can normalise the URI objects.
*/
URI.prototype.isSameDocumentAs = function(uri) {
return uri.scheme == this.scheme &&
uri.authority == this.authority &&
uri.path == this.path &&
uri.query == this.query;
};
/**
* Simple String Comparison of two URIs.
* See RFC 3986 section 6.2.1.
*
* To perform more thorough comparison, you can normalise the URI objects.
*/
URI.prototype.equals = function(uri) {
return this.isSameDocumentAs(uri) && uri.fragment == this.fragment;
};
/**
* Normalizes the URI using syntax-based normalization.
* This includes case normalization, percent-encoding normalization and path segment normalization.
* XXX: Percent-encoding normalization does not escape characters that need to be escaped.
* (Although that would not be a valid URI in the first place. See validate().)
* See RFC 3986 section 6.2.2.
*/
URI.prototype.normalize = function() {
this.removeDotSegments();
if (this.scheme)
this.scheme = this.scheme.toLowerCase();
if (this.authority)
this.authority = this.authority.replace(authorityRegex, replaceAuthority).
replace(caseRegex, replaceCase);
if (this.path)
this.path = this.path.replace(caseRegex, replaceCase);
if (this.query)
this.query = this.query.replace(caseRegex, replaceCase);
if (this.fragment)
this.fragment = this.fragment.replace(caseRegex, replaceCase);
};
var caseRegex = /%[0-9a-z]{2}/gi;
var percentRegex = /[a-zA-Z0-9\-\._~]/;
var authorityRegex = /(.*@)?([^@:]*)(:.*)?/;
function replaceCase(str) {
var dec = unescape(str);
return percentRegex.test(dec) ? dec : str.toUpperCase();
}
function replaceAuthority(str, p1, p2, p3) {
return (p1 || '') + p2.toLowerCase() + (p3 || '');
}
/**
* Resolve a relative URI (this) against a base URI.
* The base URI must be an absolute URI.
* See RFC 3986 section 5.2
*/
URI.prototype.resolve = function(baseURI) {
var uri = new URI();
if (this.scheme) {
uri.scheme = this.scheme;
uri.authority = this.authority;
uri.path = this.path;
uri.query = this.query;
} else {
uri.scheme = baseURI.scheme;
if (this.authority) {
uri.authority = this.authority;
uri.path = this.path;
uri.query = this.query;
} else {
uri.authority = baseURI.authority;
if (this.path == '') {
uri.path = baseURI.path;
uri.query = this.query || baseURI.query;
} else {
if (this.path.charAt(0) == '/') {
uri.path = this.path;
uri.removeDotSegments();
} else {
if (baseURI.authority && baseURI.path == '') {
uri.path = '/' + this.path;
} else {
uri.path = baseURI.path.substring(0, baseURI.path.lastIndexOf('/') + 1) + this.path;
}
uri.removeDotSegments();
}
uri.query = this.query;
}
}
}
uri.fragment = this.fragment;
return uri;
};
/**
* Remove dot segments from path.
* See RFC 3986 section 5.2.4
* @private
*/
URI.prototype.removeDotSegments = function() {
var input = this.path.split('/'),
output = [],
segment,
absPath = input[0] == '';
if (absPath)
input.shift();
var sFirst = input[0] == '' ? input.shift() : null;
while (input.length) {
segment = input.shift();
if (segment == '..') {
output.pop();
} else if (segment != '.') {
output.push(segment);
}
}
if (segment == '.' || segment == '..')
output.push('');
if (absPath)
output.unshift('');
this.path = output.join('/');
};
// We don't like this function because it builds up a cache that is never cleared.
// /**
// * Resolves a relative URI against an absolute base URI.
// * Convenience method.
// * @param {String} uri the relative URI to resolve
// * @param {String} baseURI the base URI (must be absolute) to resolve against
// */
// URI.resolve = function(sURI, sBaseURI) {
// var uri = cache[sURI] || (cache[sURI] = new URI(sURI));
// var baseURI = cache[sBaseURI] || (cache[sBaseURI] = new URI(sBaseURI));
// return uri.resolve(baseURI).toString();
// };
// var cache = {};
/**
* Serialises the URI to a string.
*/
URI.prototype.toString = function() {
var result = '';
if (this.scheme)
result += this.scheme + ':';
if (this.authority)
result += '//' + this.authority;
result += this.path;
if (this.query)
result += '?' + this.query;
if (this.fragment)
result += '#' + this.fragment;
return result;
};
/**
* @private
*/
function appendForwardSlash(url) {
if (url.length === 0 || url[url.length - 1] !== '/') {
url = url + '/';
}
return url;
}
/**
* Clones an object, returning a new object containing the same properties.
*
* @exports clone
*
* @param {Object} object The object to clone.
* @param {Boolean} [deep=false] If true, all properties will be deep cloned recursively.
* @returns {Object} The cloned object.
*/
function clone(object, deep) {
if (object === null || typeof object !== 'object') {
return object;
}
deep = when.defaultValue(deep, false);
var result = new object.constructor();
for ( var propertyName in object) {
if (object.hasOwnProperty(propertyName)) {
var value = object[propertyName];
if (deep) {
value = clone(value, deep);
}
result[propertyName] = value;
}
}
return result;
}
/**
* Merges two objects, copying their properties onto a new combined object. When two objects have the same
* property, the value of the property on the first object is used. If either object is undefined,
* it will be treated as an empty object.
*
* @example
* var object1 = {
* propOne : 1,
* propTwo : {
* value1 : 10
* }
* }
* var object2 = {
* propTwo : 2
* }
* var final = Cesium.combine(object1, object2);
*
* // final === {
* // propOne : 1,
* // propTwo : {
* // value1 : 10
* // }
* // }
*
* @param {Object} [object1] The first object to merge.
* @param {Object} [object2] The second object to merge.
* @param {Boolean} [deep=false] Perform a recursive merge.
* @returns {Object} The combined object containing all properties from both objects.
*
* @exports combine
*/
function combine(object1, object2, deep) {
deep = when.defaultValue(deep, false);
var result = {};
var object1Defined = when.defined(object1);
var object2Defined = when.defined(object2);
var property;
var object1Value;
var object2Value;
if (object1Defined) {
for (property in object1) {
if (object1.hasOwnProperty(property)) {
object1Value = object1[property];
if (object2Defined && deep && typeof object1Value === 'object' && object2.hasOwnProperty(property)) {
object2Value = object2[property];
if (typeof object2Value === 'object') {
result[property] = combine(object1Value, object2Value, deep);
} else {
result[property] = object1Value;
}
} else {
result[property] = object1Value;
}
}
}
}
if (object2Defined) {
for (property in object2) {
if (object2.hasOwnProperty(property) && !result.hasOwnProperty(property)) {
object2Value = object2[property];
result[property] = object2Value;
}
}
}
return result;
}
/**
* Given a relative Uri and a base Uri, returns the absolute Uri of the relative Uri.
* @exports getAbsoluteUri
*
* @param {String} relative The relative Uri.
* @param {String} [base] The base Uri.
* @returns {String} The absolute Uri of the given relative Uri.
*
* @example
* //absolute Uri will be "https://test.com/awesome.png";
* var absoluteUri = Cesium.getAbsoluteUri('awesome.png', 'https://test.com');
*/
function getAbsoluteUri(relative, base) {
var documentObject;
if (typeof document !== 'undefined') {
documentObject = document;
}
return getAbsoluteUri._implementation(relative, base, documentObject);
}
getAbsoluteUri._implementation = function(relative, base, documentObject) {
//>>includeStart('debug', pragmas.debug);
if (!when.defined(relative)) {
throw new Check.DeveloperError('relative uri is required.');
}
//>>includeEnd('debug');
if (!when.defined(base)) {
if (typeof documentObject === 'undefined') {
return relative;
}
base = when.defaultValue(documentObject.baseURI, documentObject.location.href);
}
var baseUri = new URI(base);
var relativeUri = new URI(relative);
return relativeUri.resolve(baseUri).toString();
};
/**
* Given a URI, returns the base path of the URI.
* @exports getBaseUri
*
* @param {String} uri The Uri.
* @param {Boolean} [includeQuery = false] Whether or not to include the query string and fragment form the uri
* @returns {String} The base path of the Uri.
*
* @example
* // basePath will be "/Gallery/";
* var basePath = Cesium.getBaseUri('/Gallery/simple.czml?value=true&example=false');
*
* // basePath will be "/Gallery/?value=true&example=false";
* var basePath = Cesium.getBaseUri('/Gallery/simple.czml?value=true&example=false', true);
*/
function getBaseUri(uri, includeQuery) {
//>>includeStart('debug', pragmas.debug);
if (!when.defined(uri)) {
throw new Check.DeveloperError('uri is required.');
}
//>>includeEnd('debug');
var basePath = '';
var i = uri.lastIndexOf('/');
if (i !== -1) {
basePath = uri.substring(0, i + 1);
}
if (!includeQuery) {
return basePath;
}
uri = new URI(uri);
if (when.defined(uri.query)) {
basePath += '?' + uri.query;
}
if (when.defined(uri.fragment)){
basePath += '#' + uri.fragment;
}
return basePath;
}
/**
* Given a URI, returns the extension of the URI.
* @exports getExtensionFromUri
*
* @param {String} uri The Uri.
* @returns {String} The extension of the Uri.
*
* @example
* //extension will be "czml";
* var extension = Cesium.getExtensionFromUri('/Gallery/simple.czml?value=true&example=false');
*/
function getExtensionFromUri(uri) {
//>>includeStart('debug', pragmas.debug);
if (!when.defined(uri)) {
throw new Check.DeveloperError('uri is required.');
}
//>>includeEnd('debug');
var uriObject = new URI(uri);
uriObject.normalize();
var path = uriObject.path;
var index = path.lastIndexOf('/');
if (index !== -1) {
path = path.substr(index + 1);
}
index = path.lastIndexOf('.');
if (index === -1) {
path = '';
} else {
path = path.substr(index + 1);
}
return path;
}
var blobUriRegex = /^blob:/i;
/**
* Determines if the specified uri is a blob uri.
*
* @exports isBlobUri
*
* @param {String} uri The uri to test.
* @returns {Boolean} true when the uri is a blob uri; otherwise, false.
*
* @private
*/
function isBlobUri(uri) {
//>>includeStart('debug', pragmas.debug);
Check.Check.typeOf.string('uri', uri);
//>>includeEnd('debug');
return blobUriRegex.test(uri);
}
var a;
/**
* Given a URL, determine whether that URL is considered cross-origin to the current page.
*
* @private
*/
function isCrossOriginUrl(url) {
if (!when.defined(a)) {
a = document.createElement('a');
}
// copy window location into the anchor to get consistent results
// when the port is default for the protocol (e.g. 80 for HTTP)
a.href = window.location.href;
// host includes both hostname and port if the port is not standard
var host = a.host;
var protocol = a.protocol;
a.href = url;
// IE only absolutizes href on get, not set
a.href = a.href; // eslint-disable-line no-self-assign
return protocol !== a.protocol || host !== a.host;
}
var dataUriRegex = /^data:/i;
/**
* Determines if the specified uri is a data uri.
*
* @exports isDataUri
*
* @param {String} uri The uri to test.
* @returns {Boolean} true when the uri is a data uri; otherwise, false.
*
* @private
*/
function isDataUri(uri) {
//>>includeStart('debug', pragmas.debug);
Check.Check.typeOf.string('uri', uri);
//>>includeEnd('debug');
return dataUriRegex.test(uri);
}
/**
* @private
*/
function loadAndExecuteScript(url) {
var deferred = when.when.defer();
var script = document.createElement('script');
script.async = true;
script.src = url;
var head = document.getElementsByTagName('head')[0];
script.onload = function() {
script.onload = undefined;
head.removeChild(script);
deferred.resolve();
};
script.onerror = function(e) {
deferred.reject(e);
};
head.appendChild(script);
return deferred.promise;
}
/**
* Converts an object representing a set of name/value pairs into a query string,
* with names and values encoded properly for use in a URL. Values that are arrays
* will produce multiple values with the same name.
* @exports objectToQuery
*
* @param {Object} obj The object containing data to encode.
* @returns {String} An encoded query string.
*
*
* @example
* var str = Cesium.objectToQuery({
* key1 : 'some value',
* key2 : 'a/b',
* key3 : ['x', 'y']
* });
*
* @see queryToObject
* // str will be:
* // 'key1=some%20value&key2=a%2Fb&key3=x&key3=y'
*/
function objectToQuery(obj, donotEncodeSpecialCharacters) {
//>>includeStart('debug', pragmas.debug);
if (!when.defined(obj)) {
throw new Check.DeveloperError('obj is required.');
}
//>>includeEnd('debug');
var result = '';
for ( var propName in obj) {
if (obj.hasOwnProperty(propName)) {
var value = obj[propName];
var part = encodeURIComponent(propName) + '=';
if (Array.isArray(value)) {
for (var i = 0, len = value.length; i < len; ++i) {
if (donotEncodeSpecialCharacters === true) {
result += part + encodeURI(value[i]) + '&';
} else {
result += part + encodeURIComponent(value[i]) + '&';
}
}
} else {
if (donotEncodeSpecialCharacters === true) {
result += part + encodeURI(value) + '&';
} else {
result += part + encodeURIComponent(value) + '&';
}
}
}
}
// trim last &
result = result.slice(0, -1);
// This function used to replace %20 with + which is more compact and readable.
// However, some servers didn't properly handle + as a space.
// https://github.com/CesiumGS/cesium/issues/2192
return result;
}
/**
* Parses a query string into an object, where the keys and values of the object are the
* name/value pairs from the query string, decoded. If a name appears multiple times,
* the value in the object will be an array of values.
* @exports queryToObject
*
* @param {String} queryString The query string.
* @returns {Object} An object containing the parameters parsed from the query string.
*
*
* @example
* var obj = Cesium.queryToObject('key1=some%20value&key2=a%2Fb&key3=x&key3=y');
* // obj will be:
* // {
* // key1 : 'some value',
* // key2 : 'a/b',
* // key3 : ['x', 'y']
* // }
*
* @see objectToQuery
*/
function queryToObject(queryString) {
//>>includeStart('debug', pragmas.debug);
if (!when.defined(queryString)) {
throw new Check.DeveloperError('queryString is required.');
}
//>>includeEnd('debug');
var result = {};
if (queryString === '') {
return result;
}
var parts = queryString.replace(/\+/g, '%20').split(/[&;]/);
for (var i = 0, len = parts.length; i < len; ++i) {
var subparts = parts[i].split('=');
if (subparts.length > 2) {
var index = parts[i].indexOf("=");
var key = parts[i].substring(0, index);
var strvalue = parts[i].substring(index + 1, parts[i].length);
subparts = [key, strvalue];
}
var name = decodeURIComponent(subparts[0]);
var value = subparts[1];
if (when.defined(value)) {
value = decodeURIComponent(value);
} else {
value = '';
}
var resultValue = result[name];
if (typeof resultValue === 'string') {
// expand the single value to an array
result[name] = [resultValue, value];
} else if (Array.isArray(resultValue)) {
resultValue.push(value);
} else {
result[name] = value;
}
}
return result;
}
/**
* State of the request.
*
* @exports RequestState
*/
var RequestState = {
/**
* Initial unissued state.
*
* @type Number
* @constant
*/
UNISSUED : 0,
/**
* Issued but not yet active. Will become active when open slots are available.
*
* @type Number
* @constant
*/
ISSUED : 1,
/**
* Actual http request has been sent.
*
* @type Number
* @constant
*/
ACTIVE : 2,
/**
* Request completed successfully.
*
* @type Number
* @constant
*/
RECEIVED : 3,
/**
* Request was cancelled, either explicitly or automatically because of low priority.
*
* @type Number
* @constant
*/
CANCELLED : 4,
/**
* Request failed.
*
* @type Number
* @constant
*/
FAILED : 5
};
var RequestState$1 = Object.freeze(RequestState);
/**
* An enum identifying the type of request. Used for finer grained logging and priority sorting.
*
* @exports RequestType
*/
var RequestType = {
/**
* Terrain request.
*
* @type Number
* @constant
*/
TERRAIN : 0,
/**
* Imagery request.
*
* @type Number
* @constant
*/
IMAGERY : 1,
/**
* 3D Tiles request.
*
* @type Number
* @constant
*/
TILES3D : 2,
/**
* Other request.
*
* @type Number
* @constant
*/
OTHER : 3,
PACK : 4,
BLOCK : 5,
BLOCKPACK : 6
};
var RequestType$1 = Object.freeze(RequestType);
/**
* Stores information for making a request. In general this does not need to be constructed directly.
*
* @alias Request
* @constructor
* @namespace
* @exports Request
* @param {Object} [options] An object with the following properties:
* @param {String} [options.url] The url to request.
* @param {Request~RequestCallback} [options.requestFunction] The function that makes the actual data request.
* @param {Request~CancelCallback} [options.cancelFunction] The function that is called when the request is cancelled.
* @param {Request~PriorityCallback} [options.priorityFunction] The function that is called to update the request's priority, which occurs once per frame.
* @param {Number} [options.priority=0.0] The initial priority of the request.
* @param {Boolean} [options.throttle=false] Whether to throttle and prioritize the request. If false, the request will be sent immediately. If true, the request will be throttled and sent based on priority.
* @param {Boolean} [options.throttleByServer=false] Whether to throttle the request by server.
* @param {RequestType} [options.type=RequestType.OTHER] The type of request.
*/
function Request(options) {
options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);
var throttleByServer = when.defaultValue(options.throttleByServer, false);
var throttle = when.defaultValue(options.throttle, false);
/**
* The URL to request.
*
* @type {String}
*/
this.url = options.url;
/**
* The function that makes the actual data request.
*
* @type {Request~RequestCallback}
*/
this.requestFunction = options.requestFunction;
/**
* The function that is called when the request is cancelled.
*
* @type {Request~CancelCallback}
*/
this.cancelFunction = options.cancelFunction;
/**
* The function that is called to update the request's priority, which occurs once per frame.
*
* @type {Request~PriorityCallback}
*/
this.priorityFunction = options.priorityFunction;
/**
* Priority is a unit-less value where lower values represent higher priority.
* For world-based objects, this is usually the distance from the camera.
* A request that does not have a priority function defaults to a priority of 0.
*
* If priorityFunction is defined, this value is updated every frame with the result of that call.
*
* @type {Number}
* @default 0.0
*/
this.priority = when.defaultValue(options.priority, 0.0);
/**
* Whether to throttle and prioritize the request. If false, the request will be sent immediately. If true, the
* request will be throttled and sent based on priority.
*
* @type {Boolean}
* @readonly
*
* @default false
*/
this.throttle = throttle;
/**
* Whether to throttle the request by server. Browsers typically support about 6-8 parallel connections
* for HTTP/1 servers, and an unlimited amount of connections for HTTP/2 servers. Setting this value
* to <code>true</code> is preferable for requests going through HTTP/1 servers.
*
* @type {Boolean}
* @readonly
*
* @default false
*/
this.throttleByServer = throttleByServer;
/**
* Type of request.
*
* @type {RequestType}
* @readonly
*
* @default RequestType.OTHER
*/
this.type = when.defaultValue(options.type, RequestType$1.OTHER);
/**
* A key used to identify the server that a request is going to. It is derived from the url's authority and scheme.
*
* @type {String}
*
* @private
*/
this.serverKey = undefined;
/**
* The current state of the request.
*
* @type {RequestState}
* @readonly
*/
this.state = RequestState$1.UNISSUED;
/**
* The requests's deferred promise.
*
* @type {Object}
*
* @private
*/
this.deferred = undefined;
/**
* Whether the request was explicitly cancelled.
*
* @type {Boolean}
*
* @private
*/
this.cancelled = false;
}
/**
* Mark the request as cancelled.
*
* @private
*/
Request.prototype.cancel = function() {
this.cancelled = true;
};
/**
* Duplicates a Request instance.
*
* @param {Request} [result] The object onto which to store the result.
*
* @returns {Request} The modified result parameter or a new Resource instance if one was not provided.
*/
Request.prototype.clone = function(result) {
if (!when.defined(result)) {
return new Request(this);
}
result.url = this.url;
result.requestFunction = this.requestFunction;
result.cancelFunction = this.cancelFunction;
result.priorityFunction = this.priorityFunction;
result.priority = this.priority;
result.throttle = this.throttle;
result.throttleByServer = this.throttleByServer;
result.type = this.type;
result.serverKey = this.serverKey;
// These get defaulted because the cloned request hasn't been issued
result.state = this.RequestState.UNISSUED;
result.deferred = undefined;
result.cancelled = false;
return result;
};
/**
* Parses the result of XMLHttpRequest's getAllResponseHeaders() method into
* a dictionary.
*
* @exports parseResponseHeaders
*
* @param {String} headerString The header string returned by getAllResponseHeaders(). The format is
* described here: http://www.w3.org/TR/XMLHttpRequest/#the-getallresponseheaders()-method
* @returns {Object} A dictionary of key/value pairs, where each key is the name of a header and the corresponding value
* is that header's value.
*
* @private
*/
function parseResponseHeaders(headerString) {
var headers = {};
if (!headerString) {
return headers;
}
var headerPairs = headerString.split('\u000d\u000a');
for (var i = 0; i < headerPairs.length; ++i) {
var headerPair = headerPairs[i];
// Can't use split() here because it does the wrong thing
// if the header value has the string ": " in it.
var index = headerPair.indexOf('\u003a\u0020');
if (index > 0) {
var key = headerPair.substring(0, index);
var val = headerPair.substring(index + 2);
headers[key] = val;
}
}
return headers;
}
/**
* An event that is raised when a request encounters an error.
*
* @constructor
* @alias RequestErrorEvent
*
* @param {Number} [statusCode] The HTTP error status code, such as 404.
* @param {Object} [response] The response included along with the error.
* @param {String|Object} [responseHeaders] The response headers, represented either as an object literal or as a
* string in the format returned by XMLHttpRequest's getAllResponseHeaders() function.
*/
function RequestErrorEvent(statusCode, response, responseHeaders) {
/**
* The HTTP error status code, such as 404. If the error does not have a particular
* HTTP code, this property will be undefined.
*
* @type {Number}
*/
this.statusCode = statusCode;
/**
* The response included along with the error. If the error does not include a response,
* this property will be undefined.
*
* @type {Object}
*/
this.response = response;
/**
* The headers included in the response, represented as an object literal of key/value pairs.
* If the error does not include any headers, this property will be undefined.
*
* @type {Object}
*/
this.responseHeaders = responseHeaders;
if (typeof this.responseHeaders === 'string') {
this.responseHeaders = parseResponseHeaders(this.responseHeaders);
}
}
/**
* Creates a string representing this RequestErrorEvent.
* @memberof RequestErrorEvent
*
* @returns {String} A string representing the provided RequestErrorEvent.
*/
RequestErrorEvent.prototype.toString = function() {
var str = 'Request has failed.';
if (when.defined(this.statusCode)) {
str += ' Status Code: ' + this.statusCode;
}
return str;
};
/**
* A generic utility class for managing subscribers for a particular event.
* This class is usually instantiated inside of a container class and
* exposed as a property for others to subscribe to.
*
* @alias Event
* @constructor
* @example
* MyObject.prototype.myListener = function(arg1, arg2) {
* this.myArg1Copy = arg1;
* this.myArg2Copy = arg2;
* }
*
* var myObjectInstance = new MyObject();
* var evt = new Cesium.Event();
* evt.addEventListener(MyObject.prototype.myListener, myObjectInstance);
* evt.raiseEvent('1', '2');
* evt.removeEventListener(MyObject.prototype.myListener);
*/
function Event() {
this._listeners = [];
this._scopes = [];
this._toRemove = [];
this._insideRaiseEvent = false;
}
Object.defineProperties(Event.prototype, {
/**
* The number of listeners currently subscribed to the event.
* @memberof Event.prototype
* @type {Number}
* @readonly
*/
numberOfListeners : {
get : function() {
return this._listeners.length - this._toRemove.length;
}
}
});
/**
* Registers a callback function to be executed whenever the event is raised.
* An optional scope can be provided to serve as the <code>this</code> pointer
* in which the function will execute.
*
* @param {Function} listener The function to be executed when the event is raised.
* @param {Object} [scope] An optional object scope to serve as the <code>this</code>
* pointer in which the listener function will execute.
* @returns {Event~RemoveCallback} A function that will remove this event listener when invoked.
*
* @see Event#raiseEvent
* @see Event#removeEventListener
*/
Event.prototype.addEventListener = function(listener, scope) {
//>>includeStart('debug', pragmas.debug);
Check.Check.typeOf.func('listener', listener);
//>>includeEnd('debug');
this._listeners.push(listener);
this._scopes.push(scope);
var event = this;
return function() {
event.removeEventListener(listener, scope);
};
};
/**
* Unregisters a previously registered callback.
*
* @param {Function} listener The function to be unregistered.
* @param {Object} [scope] The scope that was originally passed to addEventListener.
* @returns {Boolean} <code>true</code> if the listener was removed; <code>false</code> if the listener and scope are not registered with the event.
*
* @see Event#addEventListener
* @see Event#raiseEvent
*/
Event.prototype.removeEventListener = function(listener, scope) {
//>>includeStart('debug', pragmas.debug);
Check.Check.typeOf.func('listener', listener);
//>>includeEnd('debug');
var listeners = this._listeners;
var scopes = this._scopes;
var index = -1;
for (var i = 0; i < listeners.length; i++) {
if (listeners[i] === listener && scopes[i] === scope) {
index = i;
break;
}
}
if (index !== -1) {
if (this._insideRaiseEvent) {
//In order to allow removing an event subscription from within
//a callback, we don't actually remove the items here. Instead
//remember the index they are at and undefined their value.
this._toRemove.push(index);
listeners[index] = undefined;
scopes[index] = undefined;
} else {
listeners.splice(index, 1);
scopes.splice(index, 1);
}
return true;
}
return false;
};
function compareNumber(a,b) {
return b - a;
}
/**
* Raises the event by calling each registered listener with all supplied arguments.
*
* @param {*} arguments This method takes any number of parameters and passes them through to the listener functions.
*
* @see Event#addEventListener
* @see Event#removeEventListener
*/
Event.prototype.raiseEvent = function() {
this._insideRaiseEvent = true;
var i;
var listeners = this._listeners;
var scopes = this._scopes;
var length = listeners.length;
for (i = 0; i < length; i++) {
var listener = listeners[i];
if (when.defined(listener)) {
listeners[i].apply(scopes[i], arguments);
}
}
//Actually remove items removed in removeEventListener.
var toRemove = this._toRemove;
length = toRemove.length;
if (length > 0) {
toRemove.sort(compareNumber);
for (i = 0; i < length; i++) {
var index = toRemove[i];
listeners.splice(index, 1);
scopes.splice(index, 1);
}
toRemove.length = 0;
}
this._insideRaiseEvent = false;
};
/**
* Array implementation of a heap.
*
* @alias Heap
* @constructor
* @private
*
* @param {Object} options Object with the following properties:
* @param {Heap~ComparatorCallback} options.comparator The comparator to use for the heap. If comparator(a, b) is less than 0, sort a to a lower index than b, otherwise sort to a higher index.
*/
function Heap(options) {
//>>includeStart('debug', pragmas.debug);
Check.Check.typeOf.object('options', options);
Check.Check.defined('options.comparator', options.comparator);
//>>includeEnd('debug');
this._comparator = options.comparator;
this._array = [];
this._length = 0;
this._maximumLength = undefined;
}
Object.defineProperties(Heap.prototype, {
/**
* Gets the length of the heap.
*
* @memberof Heap.prototype
*
* @type {Number}
* @readonly
*/
length : {
get : function() {
return this._length;
}
},
/**
* Gets the internal array.
*
* @memberof Heap.prototype
*
* @type {Array}
* @readonly
*/
internalArray : {
get : function() {
return this._array;
}
},
/**
* Gets and sets the maximum length of the heap.
*
* @memberof Heap.prototype
*
* @type {Number}
*/
maximumLength : {
get : function() {
return this._maximumLength;
},
set : function(value) {
this._maximumLength = value;
if (this._length > value && value > 0) {
this._length = value;
this._array.length = value;
}
}
},
/**
* The comparator to use for the heap. If comparator(a, b) is less than 0, sort a to a lower index than b, otherwise sort to a higher index.
*
* @memberof Heap.prototype
*
* @type {Heap~ComparatorCallback}
*/
comparator : {
get : function() {
return this._comparator;
}
}
});
function swap(array, a, b) {
var temp = array[a];
array[a] = array[b];
array[b] = temp;
}
/**
* Resizes the internal array of the heap.
*
* @param {Number} [length] The length to resize internal array to. Defaults to the current length of the heap.
*/
Heap.prototype.reserve = function(length) {
length = when.defaultValue(length, this._length);
this._array.length = length;
};
/**
* Update the heap so that index and all descendants satisfy the heap property.
*
* @param {Number} [index=0] The starting index to heapify from.
*/
Heap.prototype.heapify = function(index) {
index = when.defaultValue(index, 0);
var length = this._length;
var comparator = this._comparator;
var array = this._array;
var candidate = -1;
var inserting = true;
while (inserting) {
var right = 2 * (index + 1);
var left = right - 1;
if (left < length && comparator(array[left], array[index]) < 0) {
candidate = left;
} else {
candidate = index;
}
if (right < length && comparator(array[right], array[candidate]) < 0) {
candidate = right;
}
if (candidate !== index) {
swap(array, candidate, index);
index = candidate;
} else {
inserting = false;
}
}
};
/**
* Resort the heap.
*/
Heap.prototype.resort = function() {
var length = this._length;
for (var i = Math.ceil(length / 2); i >= 0; --i) {
this.heapify(i);
}
};
/**
* Insert an element into the heap. If the length would grow greater than maximumLength
* of the heap, extra elements are removed.
*
* @param {*} element The element to insert
*
* @return {*} The element that was removed from the heap if the heap is at full capacity.
*/
Heap.prototype.insert = function(element) {
//>>includeStart('debug', pragmas.debug);
Check.Check.defined('element', element);
//>>includeEnd('debug');
var array = this._array;
var comparator = this._comparator;
var maximumLength = this._maximumLength;
var index = this._length++;
if (index < array.length) {
array[index] = element;
} else {
array.push(element);
}
while (index !== 0) {
var parent = Math.floor((index - 1) / 2);
if (comparator(array[index], array[parent]) < 0) {
swap(array, index, parent);
index = parent;
} else {
break;
}
}
var removedElement;
if (when.defined(maximumLength) && (this._length > maximumLength)) {
removedElement = array[maximumLength];
array.pop();
this._length = maximumLength;
}
return removedElement;
};
/**
* Remove the element specified by index from the heap and return it.
*
* @param {Number} [index=0] The index to remove.
* @returns {*} The specified element of the heap.
*/
Heap.prototype.pop = function(index) {
index = when.defaultValue(index, 0);
if (this._length === 0) {
return undefined;
}
//>>includeStart('debug', pragmas.debug);
Check.Check.typeOf.number.lessThan('index', index, this._length);
//>>includeEnd('debug');
var array = this._array;
var root = array[index];
swap(array, index, --this._length);
array[this._length] = undefined;
this.heapify(index);
return root;
};
/**
* Gets a timestamp that can be used in measuring the time between events. Timestamps
* are expressed in milliseconds, but it is not specified what the milliseconds are
* measured from. This function uses performance.now() if it is available, or Date.now()
* otherwise.
*
* @exports getTimestamp
*
* @returns {Number} The timestamp in milliseconds since some unspecified reference time.
*/
var getTimestamp;
if (typeof performance !== 'undefined' && typeof performance.now === 'function' && isFinite(performance.now())) {
getTimestamp = function() {
return performance.now();
};
} else {
getTimestamp = function() {
return Date.now();
};
}
var getTimestamp$1 = getTimestamp;
function sortRequests(a, b) {
return a.priority - b.priority;
}
var statistics = {
numberOfAttemptedRequests : 0,
numberOfActiveRequests : 0,
numberOfCancelledRequests : 0,
numberOfCancelledActiveRequests : 0,
numberOfFailedRequests : 0,
numberOfActiveRequestsEver : 0,
lastNumberOfActiveRequests : 0,
totalRequestTime : 0
};
var priorityHeapLength = 20;
var requestHeap = new Heap({
comparator : sortRequests
});
requestHeap.maximumLength = priorityHeapLength;
requestHeap.reserve(priorityHeapLength);
var activeRequests = [];
var numberOfActiveRequestsByServer = {};
var pageUri = typeof document !== 'undefined' ? new URI(document.location.href) : new URI();
var requestCompletedEvent = new Event();
/**
* Tracks the number of active requests and prioritizes incoming requests.
*
* @exports RequestScheduler
*
* @private
*/
function RequestScheduler() {
}
RequestScheduler.statisticRequestTime = -1;
/**
* The maximum number of simultaneous active requests. Un-throttled requests do not observe this limit.
* @type {Number}
* @default 50
*/
RequestScheduler.maximumRequests = 50;
/**
* The maximum number of simultaneous active requests per server. Un-throttled requests or servers specifically
* listed in requestsByServer do not observe this limit.
* @type {Number}
* @default 6
*/
RequestScheduler.maximumRequestsPerServer = 6;
RequestScheduler.perPacketCount = 20;//批量下载,每帧每个包的最大请求数限制,默认是20,不超过120
/**
* A per serverKey list of overrides to use for throttling instead of maximumRequestsPerServer
*/
RequestScheduler.requestsByServer = {
'api.cesium.com:443': 18,
'assets.cesium.com:443': 18
};
/**
* Specifies if the request scheduler should throttle incoming requests, or let the browser queue requests under its control.
* @type {Boolean}
* @default true
*/
RequestScheduler.throttleRequests = true;
/**
* When true, log statistics to the console every frame
* @type {Boolean}
* @default false
*/
RequestScheduler.debugShowStatistics = false;
/**
* An event that's raised when a request is completed. Event handlers are passed
* the error object if the request fails.
*
* @type {Event}
* @default Event()
*/
RequestScheduler.requestCompletedEvent = requestCompletedEvent;
Object.defineProperties(RequestScheduler, {
/**
* Returns the statistics used by the request scheduler.
*
* @memberof RequestScheduler
*
* @type Object
* @readonly
*/
statistics : {
get : function() {
return statistics;
}
},
/**
* The maximum size of the priority heap. This limits the number of requests that are sorted by priority. Only applies to requests that are not yet active.
*
* @memberof RequestScheduler
*
* @type {Number}
* @default 20
*/
priorityHeapLength : {
get : function() {
return priorityHeapLength;
},
set : function(value) {
// If the new length shrinks the heap, need to cancel some of the requests.
// Since this value is not intended to be tweaked regularly it is fine to just cancel the high priority requests.
if (value < priorityHeapLength) {
while (requestHeap.length > value) {
var request = requestHeap.pop();
cancelRequest(request);
}
}
priorityHeapLength = value;
requestHeap.maximumLength = value;
requestHeap.reserve(value);
}
}
});
function updatePriority(request) {
if (when.defined(request.priorityFunction)) {
request.priority = request.priorityFunction();
}
}
function serverHasOpenSlots(serverKey) {
var maxRequests = when.defaultValue(RequestScheduler.requestsByServer[serverKey], RequestScheduler.maximumRequestsPerServer);
return numberOfActiveRequestsByServer[serverKey] < maxRequests;
}
RequestScheduler.packRequestGroup = {};//每帧的所有需要打包的请求 : (serverIP + provider name), value :[request, request,...]
RequestScheduler.packRequestPromise = {};//每帧打包请求的promise (serverIP + provider name) : defer
RequestScheduler.packRequestQuadKey = {};//请求包的四叉树编码 (serverIP + provider name) : (quadkey;quadkey;...)
RequestScheduler.quadKeyIndex = {};//记录当前四叉树编码数组的索引
RequestScheduler.packRequestHeap = {};//每个图层对应一个二叉堆(serverIp + provider name) : heap
RequestScheduler.blockDefer = {};
RequestScheduler.blockRequest = {};
function getRequestKey(request) {
if(when.defined(request.packKey)){
return request.packKey;
}
request.packKey = request.serverKey + '_' + request.providerName;
return request.packKey;
}
function getRequestBlockKey(request){
if(when.defined(request.blockKey)){
return request.blockKey;
}
request.blockKey = request.serverKey + '_' + request.providerName + '_' + request.quadKey + request.url.substring(request.url.indexOf("dataVersion"));
return request.blockKey;
}
function preparePackRequest (request) {
var packKey = getRequestKey(request);
if(!when.defined(RequestScheduler.packRequestGroup[packKey])) {
RequestScheduler.packRequestGroup[packKey] = [];
}
if(!when.defined(RequestScheduler.packRequestQuadKey[packKey])) {
RequestScheduler.packRequestQuadKey[packKey] = '';
}
if(!when.defined(RequestScheduler.packRequestPromise[packKey])) {
RequestScheduler.packRequestPromise[packKey] = when.when.defer();
}
if(!when.defined(RequestScheduler.quadKeyIndex[packKey])) {
RequestScheduler.quadKeyIndex[packKey] = 0;
}
request.quadKeyIndex = RequestScheduler.quadKeyIndex[packKey]++;
request.deferred = RequestScheduler.packRequestPromise[packKey];
request.state = RequestState$1.ISSUED;
RequestScheduler.packRequestGroup[packKey].push(request);
return request.deferred.promise;
}
function prepareBlockRequest(request) {
var key = getRequestBlockKey(request);
var deferred = RequestScheduler.blockDefer[key];
if(!when.defined(deferred)) {
deferred = RequestScheduler.blockDefer[key] = when.when.defer();
RequestScheduler.blockRequest[key] = request;
}
request.deferred = deferred;
request.state = RequestState$1.ISSUED;
return request.deferred.promise;
}
function clearRequestPackets() {
RequestScheduler.packRequestGroup = {};
RequestScheduler.packRequestPromise = {};
RequestScheduler.packRequestQuadKey = {};
RequestScheduler.quadKeyIndex = {};
}
function clearBlockRequest() {
RequestScheduler.blockRequest = {};
}
function cancelAllRequests(requests) {
for(var i = 0,j = requests.length;i < j;i++) {
var request = requests[i];
request.state = RequestState$1.CANCELLED;
}
}
function combineQuadkey(reqGroup) {
var quadkeys = [];
var keyMap = {};
for(var i = 0,j = reqGroup.length;i < j;i++){
var request = reqGroup[i];
if(request.cancelled){
continue ;
}
var quadKey = request.quadKey;
if(keyMap[quadKey]){
continue;
}
keyMap[quadKey] = true;
quadkeys.push(quadKey);
}
return quadkeys;
}
function startPackingRequest() {
var packRequestGroup = RequestScheduler.packRequestGroup;
for(var key in packRequestGroup) {
if(packRequestGroup.hasOwnProperty(key)) {
var reqGroup = packRequestGroup[key];
if(reqGroup.length < 1) {
continue ;
}
var packRequest = reqGroup[0].clone();
var isTileMap = packRequest.url.indexOf("rest/maps") !== -1;
packRequest.serverKey = reqGroup[0].serverKey;
packRequest.state = reqGroup[0].state;
var oldUrl = packRequest.url;
var quadKeys = combineQuadkey(reqGroup);
if(quadKeys.length < 1){
continue ;
}
if (isTileMap) {
RequestScheduler.packRequestQuadKey[key] = quadKeys.join(',');
} else {
RequestScheduler.packRequestQuadKey[key] = quadKeys.join(';');
}
var quadKey = RequestScheduler.packRequestQuadKey[key];
if (packRequest.throttleByServer && !serverHasOpenSlots(packRequest.serverKey)) {
cancelAllRequests(reqGroup);
RequestScheduler.packRequestPromise[key].reject();
continue;
}
packRequest.deferred = RequestScheduler.packRequestPromise[key];
var uri = new URI(oldUrl);
if (isTileMap) {
uri.query = when.defined(uri.query) ? uri.query + '&tiles=' + quadKey : 'tiles=' + quadKey;
} else {
uri.query = when.defined(uri.query) ? uri.query + '&extratiles=' + quadKey : 'extratiles=' + quadKey;
}
packRequest.url = uri.toString();
startRequest(packRequest, packRequest.url);
}
}
clearRequestPackets();
}
function updateBlockRequest() {
var blockRequest = RequestScheduler.blockRequest;
for(var key in blockRequest) {
if(blockRequest.hasOwnProperty(key)) {
var request = blockRequest[key];
startRequest(request);
}
}
clearBlockRequest();
}
function issueRequest(request) {
if (request.state === RequestState$1.UNISSUED) {
request.state = RequestState$1.ISSUED;
if(request.type === RequestType$1.PACK || request.type === RequestType$1.BLOCKPACK){
var packKey = getRequestKey(request);
if(!when.defined(RequestScheduler.packRequestPromise[packKey])) {
RequestScheduler.packRequestPromise[packKey] = when.when.defer();
}
request.deferred = RequestScheduler.packRequestPromise[packKey];
}
else{
request.deferred = when.when.defer();
}
}
return request.deferred.promise;
}
function getRequestReceivedFunction(request) {
return function(results) {
if (request.state === RequestState$1.CANCELLED) {
// If the data request comes back but the request is cancelled, ignore it.
return;
}
--statistics.numberOfActiveRequests;
--numberOfActiveRequestsByServer[request.serverKey];
requestCompletedEvent.raiseEvent();
request.state = RequestState$1.RECEIVED;
request.deferred.resolve(results);
request.endTime = getTimestamp$1();
if(RequestScheduler.statisticRequestTime > 0 || request.type !== RequestType$1.OTHER) {
statistics.totalRequestTime += request.endTime - request.startTime;
}
if(request.type === RequestType$1.BLOCK || request.type === RequestType$1.BLOCKPACK){
var key = getRequestBlockKey(request);
if(when.defined(RequestScheduler.blockDefer[key])){
RequestScheduler.blockDefer[key] = undefined;
delete RequestScheduler.blockDefer[key];
}
}
};
}
function getRequestFailedFunction(request) {
return function(error) {
if (request.state === RequestState$1.CANCELLED) {
// If the data request comes back but the request is cancelled, ignore it.
return;
}
++statistics.numberOfFailedRequests;
--statistics.numberOfActiveRequests;
--numberOfActiveRequestsByServer[request.serverKey];
requestCompletedEvent.raiseEvent(error);
request.state = RequestState$1.FAILED;
request.deferred.reject(error);
};
}
function startRequest(request, url) {
var promise = issueRequest(request);
request.state = RequestState$1.ACTIVE;
activeRequests.push(request);
++statistics.numberOfActiveRequests;
++statistics.numberOfActiveRequestsEver;
++numberOfActiveRequestsByServer[request.serverKey];
request.startTime = getTimestamp$1();
request.requestFunction(url).then(getRequestReceivedFunction(request)).otherwise(getRequestFailedFunction(request));
return promise;
}
function cancelRequest(request) {
var active = request.state === RequestState$1.ACTIVE;
request.state = RequestState$1.CANCELLED;
++statistics.numberOfCancelledRequests;
request.deferred.reject();
if (active) {
--statistics.numberOfActiveRequests;
--numberOfActiveRequestsByServer[request.serverKey];
++statistics.numberOfCancelledActiveRequests;
}
if (when.defined(request.cancelFunction)) {
request.cancelFunction();
}
}
function updatePackRequestHeap() {
for(var key in RequestScheduler.packRequestHeap) {
if(RequestScheduler.packRequestHeap.hasOwnProperty(key)) {
var heap = RequestScheduler.packRequestHeap[key];
var issuedRequests = heap.internalArray;
var issuedLength = heap.length;
for (var i = 0; i < issuedLength; ++i) {
updatePriority(issuedRequests[i]);
}
heap.resort();
}
}
}
function packingRequest() {
for(var key in RequestScheduler.packRequestHeap) {
if(RequestScheduler.packRequestHeap.hasOwnProperty(key)) {
var heap = RequestScheduler.packRequestHeap[key];
while(heap.length > 0) {
var request = heap.pop();
if (request.cancelled) {
cancelRequest(request);
continue;
}
preparePackRequest(request);
}
}
}
startPackingRequest();
}
/**
* Sort requests by priority and start requests.
*/
RequestScheduler.update = function() {
var i;
var request;
// Loop over all active requests. Cancelled, failed, or received requests are removed from the array to make room for new requests.
var removeCount = 0;
var activeLength = activeRequests.length;
for (i = 0; i < activeLength; ++i) {
request = activeRequests[i];
if (request.cancelled) {
// Request was explicitly cancelled
cancelRequest(request);
}
if (request.state !== RequestState$1.ACTIVE) {
// Request is no longer active, remove from array
++removeCount;
continue;
}
if (removeCount > 0) {
// Shift back to fill in vacated slots from completed requests
activeRequests[i - removeCount] = request;
}
}
activeRequests.length -= removeCount;
// Update priority of issued requests and resort the heap
var issuedRequests = requestHeap.internalArray;
var issuedLength = requestHeap.length;
for (i = 0; i < issuedLength; ++i) {
updatePriority(issuedRequests[i]);
}
requestHeap.resort();
updatePackRequestHeap();
updateBlockRequest();
packingRequest();
// Get the number of open slots and fill with the highest priority requests.
// Un-throttled requests are automatically added to activeRequests, so activeRequests.length may exceed maximumRequests
var openSlots = Math.max(RequestScheduler.maximumRequests - activeRequests.length, 0);
var filledSlots = 0;
while (filledSlots < openSlots && requestHeap.length > 0) {
// Loop until all open slots are filled or the heap becomes empty
request = requestHeap.pop();
if (request.cancelled) {
// Request was explicitly cancelled
cancelRequest(request);
continue;
}
if (request.throttleByServer && !serverHasOpenSlots(request.serverKey)) {
// Open slots are available, but the request is throttled by its server. Cancel and try again later.
cancelRequest(request);
continue;
}
startRequest(request);
++filledSlots;
}
updateStatistics();
};
/**
* Get the server key from a given url.
*
* @param {String} url The url.
* @returns {String} The server key.
*/
RequestScheduler.getServerKey = function(url) {
//>>includeStart('debug', pragmas.debug);
Check.Check.typeOf.string('url', url);
//>>includeEnd('debug');
var uri = new URI(url).resolve(pageUri);
uri.normalize();
var serverKey = uri.authority;
if (!/:/.test(serverKey)) {
// If the authority does not contain a port number, add port 443 for https or port 80 for http
serverKey = serverKey + ':' + (uri.scheme === 'https' ? '443' : '80');
}
var length = numberOfActiveRequestsByServer[serverKey];
if (!when.defined(length)) {
numberOfActiveRequestsByServer[serverKey] = 0;
}
return serverKey;
};
function getPackRequestHeap(request) {
var packKey = getRequestKey(request);
var heap = RequestScheduler.packRequestHeap[packKey];
if(!when.defined(heap)) {
heap = RequestScheduler.packRequestHeap[packKey] = new Heap({
comparator : sortRequests
});
heap.maximumLength = RequestScheduler.perPacketCount;
heap.reserve(priorityHeapLength);
}
return heap;
}
/**
* Issue a request. If request.throttle is false, the request is sent immediately. Otherwise the request will be
* queued and sorted by priority before being sent.
*
* @param {Request} request The request object.
*
* @returns {Promise|undefined} A Promise for the requested data, or undefined if this request does not have high enough priority to be issued.
*/
RequestScheduler.request = function(request) {
//>>includeStart('debug', pragmas.debug);
Check.Check.typeOf.object('request', request);
Check.Check.typeOf.string('request.url', request.url);
Check.Check.typeOf.func('request.requestFunction', request.requestFunction);
//>>includeEnd('debug');
if (isDataUri(request.url) || isBlobUri(request.url)) {
requestCompletedEvent.raiseEvent();
request.state = RequestState$1.RECEIVED;
return request.requestFunction();
}
++statistics.numberOfAttemptedRequests;
if (!when.defined(request.serverKey)) {
request.serverKey = RequestScheduler.getServerKey(request.url);
}
if(request.type === RequestType$1.BLOCK) {
return prepareBlockRequest(request);
}
if (request.throttleByServer && !serverHasOpenSlots(request.serverKey)) {
// Server is saturated. Try again later.
return undefined;
}
if (!RequestScheduler.throttleRequests || !request.throttle) {
return startRequest(request);
}
if (activeRequests.length >= RequestScheduler.maximumRequests) {
// Active requests are saturated. Try again later.
return undefined;
}
// Insert into the priority heap and see if a request was bumped off. If this request is the lowest
// priority it will be returned.
updatePriority(request);
var removedRequest;
if(request.type === RequestType$1.PACK || request.type === RequestType$1.BLOCKPACK) {
var packRequestHeap = getPackRequestHeap(request);
var inset = true;
if(request.type === RequestType$1.BLOCKPACK){
for(var i=0; i<packRequestHeap.length; i++){
if(packRequestHeap._array[i].quadKey === request.quadKey){
request.blockRequest = packRequestHeap._array[i];
inset = false;
break;
}
}
}
if(inset){
removedRequest = packRequestHeap.insert(request);
}
}
else{
removedRequest = requestHeap.insert(request);
}
if (when.defined(removedRequest)) {
if (removedRequest === request) {
// Request does not have high enough priority to be issued
return undefined;
}
// A previously issued request has been bumped off the priority heap, so cancel it
cancelRequest(removedRequest);
}
return issueRequest(request);
};
function updateStatistics() {
if (!RequestScheduler.debugShowStatistics) {
return;
}
if (statistics.numberOfActiveRequests === 0 && statistics.lastNumberOfActiveRequests > 0) {
if (statistics.numberOfAttemptedRequests > 0) {
console.log('Number of attempted requests: ' + statistics.numberOfAttemptedRequests);
statistics.numberOfAttemptedRequests = 0;
}
if (statistics.numberOfCancelledRequests > 0) {
console.log('Number of cancelled requests: ' + statistics.numberOfCancelledRequests);
statistics.numberOfCancelledRequests = 0;
}
if (statistics.numberOfCancelledActiveRequests > 0) {
console.log('Number of cancelled active requests: ' + statistics.numberOfCancelledActiveRequests);
statistics.numberOfCancelledActiveRequests = 0;
}
if (statistics.numberOfFailedRequests > 0) {
console.log('Number of failed requests: ' + statistics.numberOfFailedRequests);
statistics.numberOfFailedRequests = 0;
}
}
statistics.lastNumberOfActiveRequests = statistics.numberOfActiveRequests;
}
/**
* For testing only. Clears any requests that may not have completed from previous tests.
*
* @private
*/
RequestScheduler.clearForSpecs = function() {
while (requestHeap.length > 0) {
var request = requestHeap.pop();
cancelRequest(request);
}
var length = activeRequests.length;
for (var i = 0; i < length; ++i) {
cancelRequest(activeRequests[i]);
}
activeRequests.length = 0;
numberOfActiveRequestsByServer = {};
// Clear stats
statistics.numberOfAttemptedRequests = 0;
statistics.numberOfActiveRequests = 0;
statistics.numberOfCancelledRequests = 0;
statistics.numberOfCancelledActiveRequests = 0;
statistics.numberOfFailedRequests = 0;
statistics.numberOfActiveRequestsEver = 0;
statistics.lastNumberOfActiveRequests = 0;
statistics.totalRequestTime = 0;
};
/**
* For testing only.
*
* @private
*/
RequestScheduler.numberOfActiveRequestsByServer = function(serverKey) {
return numberOfActiveRequestsByServer[serverKey];
};
/**
* For testing only.
*
* @private
*/
RequestScheduler.requestHeap = requestHeap;
/**
* A singleton that contains all of the servers that are trusted. Credentials will be sent with
* any requests to these servers.
*
* @exports TrustedServers
*
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
*/
var TrustedServers = {};
var _servers = {};
/**
* Adds a trusted server to the registry
*
* @param {String} host The host to be added.
* @param {Number} port The port used to access the host.
*
* @example
* // Add a trusted server
* TrustedServers.add('my.server.com', 80);
*/
TrustedServers.add = function(host, port) {
//>>includeStart('debug', pragmas.debug);
if (!when.defined(host)) {
throw new Check.DeveloperError('host is required.');
}
if (!when.defined(port) || port <= 0) {
throw new Check.DeveloperError('port is required to be greater than 0.');
}
//>>includeEnd('debug');
var authority = host.toLowerCase() + ':' + port;
if (!when.defined(_servers[authority])) {
_servers[authority] = true;
}
};
/**
* Removes a trusted server from the registry
*
* @param {String} host The host to be removed.
* @param {Number} port The port used to access the host.
*
* @example
* // Remove a trusted server
* TrustedServers.remove('my.server.com', 80);
*/
TrustedServers.remove = function(host, port) {
//>>includeStart('debug', pragmas.debug);
if (!when.defined(host)) {
throw new Check.DeveloperError('host is required.');
}
if (!when.defined(port) || port <= 0) {
throw new Check.DeveloperError('port is required to be greater than 0.');
}
//>>includeEnd('debug');
var authority = host.toLowerCase() + ':' + port;
if (when.defined(_servers[authority])) {
delete _servers[authority];
}
};
function getAuthority(url) {
var uri = new URI(url);
uri.normalize();
// Removes username:password@ so we just have host[:port]
var authority = uri.getAuthority();
if (!when.defined(authority)) {
return undefined; // Relative URL
}
if (authority.indexOf('@') !== -1) {
var parts = authority.split('@');
authority = parts[1];
}
// If the port is missing add one based on the scheme
if (authority.indexOf(':') === -1) {
var scheme = uri.getScheme();
if (!when.defined(scheme)) {
scheme = window.location.protocol;
scheme = scheme.substring(0, scheme.length-1);
}
if (scheme === 'http') {
authority += ':80';
} else if (scheme === 'https') {
authority += ':443';
} else {
return undefined;
}
}
return authority;
}
/**
* Tests whether a server is trusted or not. The server must have been added with the port if it is included in the url.
*
* @param {String} url The url to be tested against the trusted list
*
* @returns {boolean} Returns true if url is trusted, false otherwise.
*
* @example
* // Add server
* TrustedServers.add('my.server.com', 81);
*
* // Check if server is trusted
* if (TrustedServers.contains('https://my.server.com:81/path/to/file.png')) {
* // my.server.com:81 is trusted
* }
* if (TrustedServers.contains('https://my.server.com/path/to/file.png')) {
* // my.server.com isn't trusted
* }
*/
TrustedServers.contains = function(url) {
//>>includeStart('debug', pragmas.debug);
if (!when.defined(url)) {
throw new Check.DeveloperError('url is required.');
}
//>>includeEnd('debug');
var authority = getAuthority(url);
if (when.defined(authority) && when.defined(_servers[authority])) {
return true;
}
return false;
};
/**
* Clears the registry
*
* @example
* // Remove a trusted server
* TrustedServers.clear();
*/
TrustedServers.clear = function() {
_servers = {};
};
var warnings = {};
/**
* Logs a one time message to the console. Use this function instead of
* <code>console.log</code> directly since this does not log duplicate messages
* unless it is called from multiple workers.
*
* @exports oneTimeWarning
*
* @param {String} identifier The unique identifier for this warning.
* @param {String} [message=identifier] The message to log to the console.
*
* @example
* for(var i=0;i<foo.length;++i) {
* if (!defined(foo[i].bar)) {
* // Something that can be recovered from but may happen a lot
* oneTimeWarning('foo.bar undefined', 'foo.bar is undefined. Setting to 0.');
* foo[i].bar = 0;
* // ...
* }
* }
*
* @private
*/
function oneTimeWarning(identifier, message) {
//>>includeStart('debug', pragmas.debug);
if (!when.defined(identifier)) {
throw new Check.DeveloperError('identifier is required.');
}
//>>includeEnd('debug');
if (!when.defined(warnings[identifier])) {
warnings[identifier] = true;
console.warn(when.defaultValue(message, identifier));
}
}
oneTimeWarning.geometryOutlines = 'Entity geometry outlines are unsupported on terrain. Outlines will be disabled. To enable outlines, disable geometry terrain clamping by explicitly setting height to 0.';
oneTimeWarning.geometryZIndex = 'Entity geometry with zIndex are unsupported when height or extrudedHeight are defined. zIndex will be ignored';
oneTimeWarning.geometryHeightReference = 'Entity corridor, ellipse, polygon or rectangle with heightReference must also have a defined height. heightReference will be ignored';
oneTimeWarning.geometryExtrudedHeightReference = 'Entity corridor, ellipse, polygon or rectangle with extrudedHeightReference must also have a defined extrudedHeight. extrudedHeightReference will be ignored';
/**
* Logs a deprecation message to the console. Use this function instead of
* <code>console.log</code> directly since this does not log duplicate messages
* unless it is called from multiple workers.
*
* @exports deprecationWarning
*
* @param {String} identifier The unique identifier for this deprecated API.
* @param {String} message The message to log to the console.
*
* @example
* // Deprecated function or class
* function Foo() {
* deprecationWarning('Foo', 'Foo was deprecated in Cesium 1.01. It will be removed in 1.03. Use newFoo instead.');
* // ...
* }
*
* // Deprecated function
* Bar.prototype.func = function() {
* deprecationWarning('Bar.func', 'Bar.func() was deprecated in Cesium 1.01. It will be removed in 1.03. Use Bar.newFunc() instead.');
* // ...
* };
*
* // Deprecated property
* Object.defineProperties(Bar.prototype, {
* prop : {
* get : function() {
* deprecationWarning('Bar.prop', 'Bar.prop was deprecated in Cesium 1.01. It will be removed in 1.03. Use Bar.newProp instead.');
* // ...
* },
* set : function(value) {
* deprecationWarning('Bar.prop', 'Bar.prop was deprecated in Cesium 1.01. It will be removed in 1.03. Use Bar.newProp instead.');
* // ...
* }
* }
* });
*
* @private
*/
function deprecationWarning(identifier, message) {
//>>includeStart('debug', pragmas.debug);
if (!when.defined(identifier) || !when.defined(message)) {
throw new Check.DeveloperError('identifier and message are required.');
}
//>>includeEnd('debug');
oneTimeWarning(identifier, message);
}
var xhrBlobSupported = (function() {
try {
var xhr = new XMLHttpRequest();
xhr.open('GET', '#', true);
xhr.responseType = 'blob';
return xhr.responseType === 'blob';
} catch (e) {
return false;
}
})();
/**
* Parses a query string and returns the object equivalent.
*
* @param {Uri} uri The Uri with a query object.
* @param {Resource} resource The Resource that will be assigned queryParameters.
* @param {Boolean} merge If true, we'll merge with the resource's existing queryParameters. Otherwise they will be replaced.
* @param {Boolean} preserveQueryParameters If true duplicate parameters will be concatenated into an array. If false, keys in uri will take precedence.
*
* @private
*/
function parseQuery(uri, resource, merge, preserveQueryParameters) {
var queryString = uri.query;
if (!when.defined(queryString) || (queryString.length === 0)) {
return {};
}
var query;
// Special case we run into where the querystring is just a string, not key/value pairs
if (queryString.indexOf('=') === -1) {
var result = {};
result[queryString] = undefined;
query = result;
} else {
query = queryToObject(queryString);
}
if (merge) {
resource._queryParameters = combineQueryParameters(query, resource._queryParameters, preserveQueryParameters);
} else {
resource._queryParameters = query;
}
uri.query = undefined;
}
/**
* Converts a query object into a string.
*
* @param {Uri} uri The Uri object that will have the query object set.
* @param {Resource} resource The resource that has queryParameters
*
* @private
*/
function stringifyQuery(uri, resource) {
var queryObject = resource._queryParameters;
var keys = Object.keys(queryObject);
// We have 1 key with an undefined value, so this is just a string, not key/value pairs
if (keys.length === 1 && !when.defined(queryObject[keys[0]])) {
uri.query = keys[0];
} else {
uri.query = objectToQuery(queryObject);
}
}
/**
* Clones a value if it is defined, otherwise returns the default value
*
* @param {*} [val] The value to clone.
* @param {*} [defaultVal] The default value.
*
* @returns {*} A clone of val or the defaultVal.
*
* @private
*/
function defaultClone(val, defaultVal) {
if (!when.defined(val)) {
return defaultVal;
}
return when.defined(val.clone) ? val.clone() : clone(val);
}
/**
* Checks to make sure the Resource isn't already being requested.
*
* @param {Request} request The request to check.
*
* @private
*/
function checkAndResetRequest(request) {
if (request.state === RequestState$1.ISSUED || request.state === RequestState$1.ACTIVE) {
throw new RuntimeError.RuntimeError('The Resource is already being fetched.');
}
request.state = RequestState$1.UNISSUED;
request.deferred = undefined;
}
/**
* This combines a map of query parameters.
*
* @param {Object} q1 The first map of query parameters. Values in this map will take precedence if preserveQueryParameters is false.
* @param {Object} q2 The second map of query parameters.
* @param {Boolean} preserveQueryParameters If true duplicate parameters will be concatenated into an array. If false, keys in q1 will take precedence.
*
* @returns {Object} The combined map of query parameters.
*
* @example
* var q1 = {
* a: 1,
* b: 2
* };
* var q2 = {
* a: 3,
* c: 4
* };
* var q3 = {
* b: [5, 6],
* d: 7
* }
*
* // Returns
* // {
* // a: [1, 3],
* // b: 2,
* // c: 4
* // };
* combineQueryParameters(q1, q2, true);
*
* // Returns
* // {
* // a: 1,
* // b: 2,
* // c: 4
* // };
* combineQueryParameters(q1, q2, false);
*
* // Returns
* // {
* // a: 1,
* // b: [2, 5, 6],
* // d: 7
* // };
* combineQueryParameters(q1, q3, true);
*
* // Returns
* // {
* // a: 1,
* // b: 2,
* // d: 7
* // };
* combineQueryParameters(q1, q3, false);
*
* @private
*/
function combineQueryParameters(q1, q2, preserveQueryParameters) {
if (!preserveQueryParameters) {
return combine(q1, q2);
}
var result = clone(q1, true);
for (var param in q2) {
if (q2.hasOwnProperty(param)) {
var value = result[param];
var q2Value = q2[param];
if (when.defined(value)) {
if (!Array.isArray(value)) {
value = result[param] = [value];
}
result[param] = value.concat(q2Value);
} else {
result[param] = Array.isArray(q2Value) ? q2Value.slice() : q2Value;
}
}
}
return result;
}
/**
* A resource that includes the location and any other parameters we need to retrieve it or create derived resources. It also provides the ability to retry requests.
*
* @alias Resource
* @constructor
*
* @param {String|Object} options A url or an object with the following properties
* @param {String} options.url The url of the resource.
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
*
* @example
* function refreshTokenRetryCallback(resource, error) {
* if (error.statusCode === 403) {
* // 403 status code means a new token should be generated
* return getNewAccessToken()
* .then(function(token) {
* resource.queryParameters.access_token = token;
* return true;
* })
* .otherwise(function() {
* return false;
* });
* }
*
* return false;
* }
*
* var resource = new Resource({
* url: 'http://server.com/path/to/resource.json',
* proxy: new DefaultProxy('/proxy/'),
* headers: {
* 'X-My-Header': 'valueOfHeader'
* },
* queryParameters: {
* 'access_token': '123-435-456-000'
* },
* retryCallback: refreshTokenRetryCallback,
* retryAttempts: 1
* });
*/
function Resource(options) {
options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);
if (typeof options === 'string') {
options = {
url: options
};
}
//>>includeStart('debug', pragmas.debug);
Check.Check.typeOf.string('options.url', options.url);
//>>includeEnd('debug');
this._url = undefined;
this._templateValues = defaultClone(options.templateValues, {});
this._queryParameters = defaultClone(options.queryParameters, {});
/**
* Additional HTTP headers that will be sent with the request.
*
* @type {Object}
*/
this.headers = defaultClone(options.headers, {});
/**
* A Request object that will be used. Intended for internal use only.
*
* @type {Request}
*/
this.request = when.defaultValue(options.request, new Request());
/**
* A proxy to be used when loading the resource.
*
* @type {DefaultProxy}
*/
this.proxy = options.proxy;
/**
* Function to call when a request for this resource fails. If it returns true or a Promise that resolves to true, the request will be retried.
*
* @type {Function}
*/
this.retryCallback = options.retryCallback;
/**
* The number of times the retryCallback should be called before giving up.
*
* @type {Number}
*/
this.retryAttempts = when.defaultValue(options.retryAttempts, 0);
this._retryCount = 0;
var uri = new URI(options.url);
parseQuery(uri, this, true, true);
// Remove the fragment as it's not sent with a request
uri.fragment = undefined;
this._url = uri.toString();
}
/**
* A helper function to create a resource depending on whether we have a String or a Resource
*
* @param {Resource|String} resource A Resource or a String to use when creating a new Resource.
*
* @returns {Resource} If resource is a String, a Resource constructed with the url and options. Otherwise the resource parameter is returned.
*
* @private
*/
Resource.createIfNeeded = function(resource) {
if (resource instanceof Resource) {
// Keep existing request object. This function is used internally to duplicate a Resource, so that it can't
// be modified outside of a class that holds it (eg. an imagery or terrain provider). Since the Request objects
// are managed outside of the providers, by the tile loading code, we want to keep the request property the same so if it is changed
// in the underlying tiling code the requests for this resource will use it.
return resource.getDerivedResource({
request: resource.request
});
}
if (typeof resource !== 'string') {
return resource;
}
return new Resource({
url: resource
});
};
var supportsImageBitmapOptionsPromise;
/**
* A helper function to check whether createImageBitmap supports passing ImageBitmapOptions.
*
* @returns {Promise<Boolean>} A promise that resolves to true if this browser supports creating an ImageBitmap with options.
*
* @private
*/
Resource.supportsImageBitmapOptions = function() {
// Until the HTML folks figure out what to do about this, we need to actually try loading an image to
// know if this browser supports passing options to the createImageBitmap function.
// https://github.com/whatwg/html/pull/4248
if (when.defined(supportsImageBitmapOptionsPromise)) {
return supportsImageBitmapOptionsPromise;
}
if (typeof createImageBitmap !== 'function') {
supportsImageBitmapOptionsPromise = when.when.resolve(false);
return supportsImageBitmapOptionsPromise;
}
var imageDataUri = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVQImWP4////fwAJ+wP9CNHoHgAAAABJRU5ErkJggg==';
supportsImageBitmapOptionsPromise = Resource.fetchBlob({
url : imageDataUri
})
.then(function(blob) {
return createImageBitmap(blob, {
imageOrientation: 'flipY',
premultiplyAlpha: 'none'
});
})
.then(function(imageBitmap) {
return true;
})
.otherwise(function() {
return false;
});
return supportsImageBitmapOptionsPromise;
};
Object.defineProperties(Resource, {
/**
* Returns true if blobs are supported.
*
* @memberof Resource
* @type {Boolean}
*
* @readonly
*/
isBlobSupported : {
get : function() {
return xhrBlobSupported;
}
}
});
Object.defineProperties(Resource.prototype, {
/**
* Query parameters appended to the url.
*
* @memberof Resource.prototype
* @type {Object}
*
* @readonly
*/
queryParameters: {
get: function() {
return this._queryParameters;
}
},
/**
* The key/value pairs used to replace template parameters in the url.
*
* @memberof Resource.prototype
* @type {Object}
*
* @readonly
*/
templateValues: {
get: function() {
return this._templateValues;
}
},
/**
* The url to the resource with template values replaced, query string appended and encoded by proxy if one was set.
*
* @memberof Resource.prototype
* @type {String}
*/
url: {
get: function() {
return this.getUrlComponent(true, true);
},
set: function(value) {
var uri = new URI(value);
parseQuery(uri, this, false);
// Remove the fragment as it's not sent with a request
uri.fragment = undefined;
this._url = uri.toString();
}
},
/**
* The file extension of the resource.
*
* @memberof Resource.prototype
* @type {String}
*
* @readonly
*/
extension: {
get: function() {
return getExtensionFromUri(this._url);
}
},
/**
* True if the Resource refers to a data URI.
*
* @memberof Resource.prototype
* @type {Boolean}
*/
isDataUri: {
get: function() {
return isDataUri(this._url);
}
},
/**
* True if the Resource refers to a blob URI.
*
* @memberof Resource.prototype
* @type {Boolean}
*/
isBlobUri: {
get: function() {
return isBlobUri(this._url);
}
},
/**
* True if the Resource refers to a cross origin URL.
*
* @memberof Resource.prototype
* @type {Boolean}
*/
isCrossOriginUrl: {
get: function() {
return isCrossOriginUrl(this._url);
}
},
/**
* True if the Resource has request headers. This is equivalent to checking if the headers property has any keys.
*
* @memberof Resource.prototype
* @type {Boolean}
*/
hasHeaders: {
get: function() {
return (Object.keys(this.headers).length > 0);
}
}
});
/**
* Returns the url, optional with the query string and processed by a proxy.
*
* @param {Boolean} [query=false] If true, the query string is included.
* @param {Boolean} [proxy=false] If true, the url is processed the proxy object if defined.
*
* @returns {String} The url with all the requested components.
*/
Resource.prototype.getUrlComponent = function(query, proxy) {
if(this.isDataUri) {
return this._url;
}
var uri = new URI(this._url);
if (query) {
stringifyQuery(uri, this);
}
// objectToQuery escapes the placeholders. Undo that.
var url = uri.toString().replace(/%7B/g, '{').replace(/%7D/g, '}');
var templateValues = this._templateValues;
url = url.replace(/{(.*?)}/g, function(match, key) {
var replacement = templateValues[key];
if (when.defined(replacement)) {
// use the replacement value from templateValues if there is one...
return encodeURIComponent(replacement);
}
// otherwise leave it unchanged
return match;
});
if (proxy && when.defined(this.proxy)) {
url = this.proxy.getURL(url);
}
return url;
};
/**
* Combines the specified object and the existing query parameters. This allows you to add many parameters at once,
* as opposed to adding them one at a time to the queryParameters property. If a value is already set, it will be replaced with the new value.
*
* @param {Object} params The query parameters
* @param {Boolean} [useAsDefault=false] If true the params will be used as the default values, so they will only be set if they are undefined.
*/
Resource.prototype.setQueryParameters = function(params, useAsDefault) {
if (useAsDefault) {
this._queryParameters = combineQueryParameters(this._queryParameters, params, false);
} else {
this._queryParameters = combineQueryParameters(params, this._queryParameters, false);
}
};
/**
* Combines the specified object and the existing query parameters. This allows you to add many parameters at once,
* as opposed to adding them one at a time to the queryParameters property.
*
* @param {Object} params The query parameters
*/
Resource.prototype.appendQueryParameters = function(params) {
this._queryParameters = combineQueryParameters(params, this._queryParameters, true);
};
/**
* Combines the specified object and the existing template values. This allows you to add many values at once,
* as opposed to adding them one at a time to the templateValues property. If a value is already set, it will become an array and the new value will be appended.
*
* @param {Object} template The template values
* @param {Boolean} [useAsDefault=false] If true the values will be used as the default values, so they will only be set if they are undefined.
*/
Resource.prototype.setTemplateValues = function(template, useAsDefault) {
if (useAsDefault) {
this._templateValues = combine(this._templateValues, template);
} else {
this._templateValues = combine(template, this._templateValues);
}
};
/**
* Returns a resource relative to the current instance. All properties remain the same as the current instance unless overridden in options.
*
* @param {Object} options An object with the following properties
* @param {String} [options.url] The url that will be resolved relative to the url of the current instance.
* @param {Object} [options.queryParameters] An object containing query parameters that will be combined with those of the current instance.
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}). These will be combined with those of the current instance.
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
* @param {Resource~RetryCallback} [options.retryCallback] The function to call when loading the resource fails.
* @param {Number} [options.retryAttempts] The number of times the retryCallback should be called before giving up.
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
* @param {Boolean} [options.preserveQueryParameters=false] If true, this will keep all query parameters from the current resource and derived resource. If false, derived parameters will replace those of the current resource.
*
* @returns {Resource} The resource derived from the current one.
*/
Resource.prototype.getDerivedResource = function(options) {
var resource = this.clone();
resource._retryCount = 0;
if (when.defined(options.url)) {
var uri = new URI(options.url);
var preserveQueryParameters = when.defaultValue(options.preserveQueryParameters, false);
parseQuery(uri, resource, true, preserveQueryParameters);
// Remove the fragment as it's not sent with a request
uri.fragment = undefined;
resource._url = uri.resolve(new URI(getAbsoluteUri(this._url))).toString();
}
if (when.defined(options.queryParameters)) {
resource._queryParameters = combine(options.queryParameters, resource._queryParameters);
}
if (when.defined(options.templateValues)) {
resource._templateValues = combine(options.templateValues, resource.templateValues);
}
if (when.defined(options.headers)) {
resource.headers = combine(options.headers, resource.headers);
}
if (when.defined(options.proxy)) {
resource.proxy = options.proxy;
}
if (when.defined(options.request)) {
resource.request = options.request;
}
if (when.defined(options.retryCallback)) {
resource.retryCallback = options.retryCallback;
}
if (when.defined(options.retryAttempts)) {
resource.retryAttempts = options.retryAttempts;
}
return resource;
};
/**
* Called when a resource fails to load. This will call the retryCallback function if defined until retryAttempts is reached.
*
* @param {Error} [error] The error that was encountered.
*
* @returns {Promise<Boolean>} A promise to a boolean, that if true will cause the resource request to be retried.
*
* @private
*/
Resource.prototype.retryOnError = function(error) {
var retryCallback = this.retryCallback;
if ((typeof retryCallback !== 'function') || (this._retryCount >= this.retryAttempts)) {
return when.when(false);
}
var that = this;
return when.when(retryCallback(this, error))
.then(function(result) {
++that._retryCount;
return result;
});
};
/**
* Duplicates a Resource instance.
*
* @param {Resource} [result] The object onto which to store the result.
*
* @returns {Resource} The modified result parameter or a new Resource instance if one was not provided.
*/
Resource.prototype.clone = function(result) {
if (!when.defined(result)) {
result = new Resource({
url : this._url
});
}
result._url = this._url;
result._queryParameters = clone(this._queryParameters);
result._templateValues = clone(this._templateValues);
result.headers = clone(this.headers);
result.proxy = this.proxy;
result.retryCallback = this.retryCallback;
result.retryAttempts = this.retryAttempts;
result._retryCount = 0;
result.request = this.request.clone();
return result;
};
/**
* Returns the base path of the Resource.
*
* @param {Boolean} [includeQuery = false] Whether or not to include the query string and fragment form the uri
*
* @returns {String} The base URI of the resource
*/
Resource.prototype.getBaseUri = function(includeQuery) {
return getBaseUri(this.getUrlComponent(includeQuery), includeQuery);
};
/**
* Appends a forward slash to the URL.
*/
Resource.prototype.appendForwardSlash = function() {
this._url = appendForwardSlash(this._url);
};
/**
* Asynchronously loads the resource as raw binary data. Returns a promise that will resolve to
* an ArrayBuffer once loaded, or reject if the resource failed to load. The data is loaded
* using XMLHttpRequest, which means that in order to make requests to another origin,
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
*
* @returns {Promise.<ArrayBuffer>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*
* @example
* // load a single URL asynchronously
* resource.fetchArrayBuffer().then(function(arrayBuffer) {
* // use the data
* }).otherwise(function(error) {
* // an error occurred
* });
*
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
*/
Resource.prototype.fetchArrayBuffer = function () {
return this.fetch({
responseType : 'arraybuffer'
});
};
/**
* Creates a Resource and calls fetchArrayBuffer() on it.
*
* @param {String|Object} options A url or an object with the following properties
* @param {String} options.url The url of the resource.
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
* @returns {Promise.<ArrayBuffer>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*/
Resource.fetchArrayBuffer = function (options) {
var resource = new Resource(options);
return resource.fetchArrayBuffer();
};
/**
* Asynchronously loads the given resource as a blob. Returns a promise that will resolve to
* a Blob once loaded, or reject if the resource failed to load. The data is loaded
* using XMLHttpRequest, which means that in order to make requests to another origin,
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
*
* @returns {Promise.<Blob>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*
* @example
* // load a single URL asynchronously
* resource.fetchBlob().then(function(blob) {
* // use the data
* }).otherwise(function(error) {
* // an error occurred
* });
*
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
*/
Resource.prototype.fetchBlob = function () {
return this.fetch({
responseType : 'blob'
});
};
/**
* Creates a Resource and calls fetchBlob() on it.
*
* @param {String|Object} options A url or an object with the following properties
* @param {String} options.url The url of the resource.
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
* @returns {Promise.<Blob>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*/
Resource.fetchBlob = function (options) {
var resource = new Resource(options);
return resource.fetchBlob();
};
/**
* Asynchronously loads the given image resource. Returns a promise that will resolve to
* an {@link https://developer.mozilla.org/en-US/docs/Web/API/ImageBitmap|ImageBitmap} if <code>preferImageBitmap</code> is true and the browser supports <code>createImageBitmap</code> or otherwise an
* {@link https://developer.mozilla.org/en-US/docs/Web/API/HTMLImageElement|Image} once loaded, or reject if the image failed to load.
*
* @param {Object} [options] An object with the following properties.
* @param {Boolean} [options.preferBlob=false] If true, we will load the image via a blob.
* @param {Boolean} [options.preferImageBitmap=false] If true, image will be decoded during fetch and an <code>ImageBitmap</code> is returned.
* @param {Boolean} [options.flipY=false] If true, image will be vertically flipped during decode. Only applies if the browser supports <code>createImageBitmap</code>.
* @returns {Promise.<ImageBitmap>|Promise.<Image>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*
*
* @example
* // load a single image asynchronously
* resource.fetchImage().then(function(image) {
* // use the loaded image
* }).otherwise(function(error) {
* // an error occurred
* });
*
* // load several images in parallel
* when.all([resource1.fetchImage(), resource2.fetchImage()]).then(function(images) {
* // images is an array containing all the loaded images
* });
*
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
*/
Resource.prototype.fetchImage = function (options) {
options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);
var preferImageBitmap = when.defaultValue(options.preferImageBitmap, false);
var preferBlob = when.defaultValue(options.preferBlob, false);
var flipY = when.defaultValue(options.flipY, false);
checkAndResetRequest(this.request);
// We try to load the image normally if
// 1. Blobs aren't supported
// 2. It's a data URI
// 3. It's a blob URI
// 4. It doesn't have request headers and we preferBlob is false
if (!xhrBlobSupported || this.isDataUri || this.isBlobUri || (!this.hasHeaders && !preferBlob)) {
return fetchImage({
resource: this,
flipY: flipY,
preferImageBitmap: preferImageBitmap
});
}
var blobPromise = this.fetchBlob();
if (!when.defined(blobPromise)) {
return;
}
var supportsImageBitmap;
var useImageBitmap;
var generatedBlobResource;
var generatedBlob;
return Resource.supportsImageBitmapOptions()
.then(function(result) {
supportsImageBitmap = result;
useImageBitmap = supportsImageBitmap && preferImageBitmap;
return blobPromise;
})
.then(function(blob) {
if (!when.defined(blob)) {
return;
}
generatedBlob = blob;
if (useImageBitmap) {
return Resource.createImageBitmapFromBlob(blob, {
flipY: flipY,
premultiplyAlpha: false
});
}
var blobUrl = window.URL.createObjectURL(blob);
generatedBlobResource = new Resource({
url: blobUrl
});
return fetchImage({
resource: generatedBlobResource,
flipY: flipY,
preferImageBitmap: false
});
})
.then(function(image) {
if (!when.defined(image)) {
return;
}
// The blob object may be needed for use by a TileDiscardPolicy,
// so attach it to the image.
image.blob = generatedBlob;
if (useImageBitmap) {
return image;
}
window.URL.revokeObjectURL(generatedBlobResource.url);
return image;
})
.otherwise(function(error) {
if (when.defined(generatedBlobResource)) {
window.URL.revokeObjectURL(generatedBlobResource.url);
}
// If the blob load succeeded but the image decode failed, attach the blob
// to the error object for use by a TileDiscardPolicy.
// In particular, BingMapsImageryProvider uses this to detect the
// zero-length response that is returned when a tile is not available.
error.blob = generatedBlob;
return when.when.reject(error);
});
};
/**
* Fetches an image and returns a promise to it.
*
* @param {Object} [options] An object with the following properties.
* @param {Resource} [options.resource] Resource object that points to an image to fetch.
* @param {Boolean} [options.preferImageBitmap] If true, image will be decoded during fetch and an <code>ImageBitmap</code> is returned.
* @param {Boolean} [options.flipY] If true, image will be vertically flipped during decode. Only applies if the browser supports <code>createImageBitmap</code>.
*
* @private
*/
function fetchImage(options) {
var resource = options.resource;
var flipY = options.flipY;
var preferImageBitmap = options.preferImageBitmap;
var request = resource.request;
request.url = resource.url;
request.requestFunction = function() {
var crossOrigin = false;
// data URIs can't have crossorigin set.
if (!resource.isDataUri && !resource.isBlobUri) {
crossOrigin = resource.isCrossOriginUrl;
}
var deferred = when.when.defer();
Resource._Implementations.createImage(request, crossOrigin, deferred, flipY, preferImageBitmap);
return deferred.promise;
};
var promise = RequestScheduler.request(request);
if (!when.defined(promise)) {
return;
}
return promise
.otherwise(function(e) {
// Don't retry cancelled or otherwise aborted requests
if (request.state !== RequestState$1.FAILED) {
return when.when.reject(e);
}
return resource.retryOnError(e)
.then(function(retry) {
if (retry) {
// Reset request so it can try again
request.state = RequestState$1.UNISSUED;
request.deferred = undefined;
return fetchImage({
resource: resource,
flipY: flipY,
preferImageBitmap: preferImageBitmap
});
}
return when.when.reject(e);
});
});
}
/**
* Creates a Resource and calls fetchImage() on it.
*
* @param {String|Object} options A url or an object with the following properties
* @param {String} options.url The url of the resource.
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
* @param {Boolean} [options.flipY=false] Whether to vertically flip the image during fetch and decode. Only applies when requesting an image and the browser supports <code>createImageBitmap</code>.
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
* @param {Boolean} [options.preferBlob=false] If true, we will load the image via a blob.
* @param {Boolean} [options.preferImageBitmap=false] If true, image will be decoded during fetch and an <code>ImageBitmap</code> is returned.
* @returns {Promise.<ImageBitmap>|Promise.<Image>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*/
Resource.fetchImage = function (options) {
var resource = new Resource(options);
return resource.fetchImage({
flipY: options.flipY,
preferBlob: options.preferBlob,
preferImageBitmap: options.preferImageBitmap
});
};
/**
* Asynchronously loads the given resource as text. Returns a promise that will resolve to
* a String once loaded, or reject if the resource failed to load. The data is loaded
* using XMLHttpRequest, which means that in order to make requests to another origin,
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
*
* @returns {Promise.<String>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*
* @example
* // load text from a URL, setting a custom header
* var resource = new Resource({
* url: 'http://someUrl.com/someJson.txt',
* headers: {
* 'X-Custom-Header' : 'some value'
* }
* });
* resource.fetchText().then(function(text) {
* // Do something with the text
* }).otherwise(function(error) {
* // an error occurred
* });
*
* @see {@link https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest|XMLHttpRequest}
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
*/
Resource.prototype.fetchText = function() {
return this.fetch({
responseType : 'text'
});
};
/**
* Creates a Resource and calls fetchText() on it.
*
* @param {String|Object} options A url or an object with the following properties
* @param {String} options.url The url of the resource.
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
* @returns {Promise.<String>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*/
Resource.fetchText = function (options) {
var resource = new Resource(options);
return resource.fetchText();
};
// note: */* below is */* but that ends the comment block early
/**
* Asynchronously loads the given resource as JSON. Returns a promise that will resolve to
* a JSON object once loaded, or reject if the resource failed to load. The data is loaded
* using XMLHttpRequest, which means that in order to make requests to another origin,
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled. This function
* adds 'Accept: application/json,*/*;q=0.01' to the request headers, if not
* already specified.
*
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*
*
* @example
* resource.fetchJson().then(function(jsonData) {
* // Do something with the JSON object
* }).otherwise(function(error) {
* // an error occurred
* });
*
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
*/
Resource.prototype.fetchJson = function() {
var promise = this.fetch({
responseType : 'text',
headers: {
Accept : 'application/json,*/*;q=0.01'
}
});
if (!when.defined(promise)) {
return undefined;
}
return promise
.then(function(value) {
if (!when.defined(value)) {
return;
}
return JSON.parse(value);
});
};
/**
* Creates a Resource and calls fetchJson() on it.
*
* @param {String|Object} options A url or an object with the following properties
* @param {String} options.url The url of the resource.
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*/
Resource.fetchJson = function (options) {
var resource = new Resource(options);
return resource.fetchJson();
};
/**
* Asynchronously loads the given resource as XML. Returns a promise that will resolve to
* an XML Document once loaded, or reject if the resource failed to load. The data is loaded
* using XMLHttpRequest, which means that in order to make requests to another origin,
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
*
* @returns {Promise.<XMLDocument>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*
*
* @example
* // load XML from a URL, setting a custom header
* Cesium.loadXML('http://someUrl.com/someXML.xml', {
* 'X-Custom-Header' : 'some value'
* }).then(function(document) {
* // Do something with the document
* }).otherwise(function(error) {
* // an error occurred
* });
*
* @see {@link https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest|XMLHttpRequest}
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
*/
Resource.prototype.fetchXML = function() {
return this.fetch({
responseType : 'document',
overrideMimeType : 'text/xml'
});
};
/**
* Creates a Resource and calls fetchXML() on it.
*
* @param {String|Object} options A url or an object with the following properties
* @param {String} options.url The url of the resource.
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
* @returns {Promise.<XMLDocument>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*/
Resource.fetchXML = function (options) {
var resource = new Resource(options);
return resource.fetchXML();
};
/**
* Requests a resource using JSONP.
*
* @param {String} [callbackParameterName='callback'] The callback parameter name that the server expects.
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*
*
* @example
* // load a data asynchronously
* resource.fetchJsonp().then(function(data) {
* // use the loaded data
* }).otherwise(function(error) {
* // an error occurred
* });
*
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
*/
Resource.prototype.fetchJsonp = function(callbackParameterName) {
callbackParameterName = when.defaultValue(callbackParameterName, 'callback');
checkAndResetRequest(this.request);
//generate a unique function name
var functionName;
do {
functionName = 'loadJsonp' + Math.random().toString().substring(2, 8);
} while (when.defined(window[functionName]));
return fetchJsonp(this, callbackParameterName, functionName);
};
function fetchJsonp(resource, callbackParameterName, functionName) {
var callbackQuery = {};
callbackQuery[callbackParameterName] = functionName;
resource.setQueryParameters(callbackQuery);
var request = resource.request;
request.url = resource.url;
request.requestFunction = function() {
var deferred = when.when.defer();
//assign a function with that name in the global scope
window[functionName] = function(data) {
deferred.resolve(data);
try {
delete window[functionName];
} catch (e) {
window[functionName] = undefined;
}
};
Resource._Implementations.loadAndExecuteScript(resource.url, functionName, deferred);
return deferred.promise;
};
var promise = RequestScheduler.request(request);
if (!when.defined(promise)) {
return;
}
return promise
.otherwise(function(e) {
if (request.state !== RequestState$1.FAILED) {
return when.when.reject(e);
}
return resource.retryOnError(e)
.then(function(retry) {
if (retry) {
// Reset request so it can try again
request.state = RequestState$1.UNISSUED;
request.deferred = undefined;
return fetchJsonp(resource, callbackParameterName, functionName);
}
return when.when.reject(e);
});
});
}
/**
* Creates a Resource from a URL and calls fetchJsonp() on it.
*
* @param {String|Object} options A url or an object with the following properties
* @param {String} options.url The url of the resource.
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
* @param {String} [options.callbackParameterName='callback'] The callback parameter name that the server expects.
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*/
Resource.fetchJsonp = function (options) {
var resource = new Resource(options);
return resource.fetchJsonp(options.callbackParameterName);
};
/**
* @private
*/
Resource.prototype._makeRequest = function(options) {
var resource = this;
checkAndResetRequest(resource.request);
var request = resource.request;
request.url = resource.url;
request.requestFunction = function(url) {
var responseType = options.responseType;
var headers = combine(options.headers, resource.headers);
var overrideMimeType = options.overrideMimeType;
var method = options.method;
var data = options.data;
var deferred = when.when.defer();
var newUrl = when.defined(url) ? url : resource.url;
var xhr = Resource._Implementations.loadWithXhr(newUrl, responseType, method, data, headers, deferred, overrideMimeType);
if (when.defined(xhr) && when.defined(xhr.abort)) {
request.cancelFunction = function() {
xhr.abort();
};
}
return deferred.promise;
};
var promise = RequestScheduler.request(request);
if (!when.defined(promise)) {
return;
}
return promise
.then(function(data) {
return data;
})
.otherwise(function(e) {
if (request.state !== RequestState$1.FAILED) {
return when.when.reject(e);
}
return resource.retryOnError(e)
.then(function(retry) {
if (retry) {
// Reset request so it can try again
request.state = RequestState$1.UNISSUED;
request.deferred = undefined;
return resource.fetch(options);
}
return when.when.reject(e);
});
});
};
var dataUriRegex$1 = /^data:(.*?)(;base64)?,(.*)$/;
function decodeDataUriText(isBase64, data) {
var result = decodeURIComponent(data);
if (isBase64) {
return atob(result);
}
return result;
}
function decodeDataUriArrayBuffer(isBase64, data) {
var byteString = decodeDataUriText(isBase64, data);
var buffer = new ArrayBuffer(byteString.length);
var view = new Uint8Array(buffer);
for (var i = 0; i < byteString.length; i++) {
view[i] = byteString.charCodeAt(i);
}
return buffer;
}
function decodeDataUri(dataUriRegexResult, responseType) {
responseType = when.defaultValue(responseType, '');
var mimeType = dataUriRegexResult[1];
var isBase64 = !!dataUriRegexResult[2];
var data = dataUriRegexResult[3];
switch (responseType) {
case '':
case 'text':
return decodeDataUriText(isBase64, data);
case 'arraybuffer':
return decodeDataUriArrayBuffer(isBase64, data);
case 'blob':
var buffer = decodeDataUriArrayBuffer(isBase64, data);
return new Blob([buffer], {
type : mimeType
});
case 'document':
var parser = new DOMParser();
return parser.parseFromString(decodeDataUriText(isBase64, data), mimeType);
case 'json':
return JSON.parse(decodeDataUriText(isBase64, data));
default:
//>>includeStart('debug', pragmas.debug);
throw new Check.DeveloperError('Unhandled responseType: ' + responseType);
//>>includeEnd('debug');
}
}
/**
* Asynchronously loads the given resource. Returns a promise that will resolve to
* the result once loaded, or reject if the resource failed to load. The data is loaded
* using XMLHttpRequest, which means that in order to make requests to another origin,
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled. It's recommended that you use
* the more specific functions eg. fetchJson, fetchBlob, etc.
*
* @param {Object} [options] Object with the following properties:
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
* @param {Object} [options.headers] Additional HTTP headers to send with the request, if any.
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*
*
* @example
* resource.fetch()
* .then(function(body) {
* // use the data
* }).otherwise(function(error) {
* // an error occurred
* });
*
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
*/
Resource.prototype.fetch = function(options) {
options = defaultClone(options, {});
options.method = 'GET';
return this._makeRequest(options);
};
/**
* Creates a Resource from a URL and calls fetch() on it.
*
* @param {String|Object} options A url or an object with the following properties
* @param {String} options.url The url of the resource.
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*/
Resource.fetch = function (options) {
var resource = new Resource(options);
return resource.fetch({
// Make copy of just the needed fields because headers can be passed to both the constructor and to fetch
responseType: options.responseType,
overrideMimeType: options.overrideMimeType
});
};
/**
* Asynchronously deletes the given resource. Returns a promise that will resolve to
* the result once loaded, or reject if the resource failed to load. The data is loaded
* using XMLHttpRequest, which means that in order to make requests to another origin,
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
*
* @param {Object} [options] Object with the following properties:
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
* @param {Object} [options.headers] Additional HTTP headers to send with the request, if any.
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*
*
* @example
* resource.delete()
* .then(function(body) {
* // use the data
* }).otherwise(function(error) {
* // an error occurred
* });
*
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
*/
Resource.prototype.delete = function(options) {
options = defaultClone(options, {});
options.method = 'DELETE';
return this._makeRequest(options);
};
/**
* Creates a Resource from a URL and calls delete() on it.
*
* @param {String|Object} options A url or an object with the following properties
* @param {String} options.url The url of the resource.
* @param {Object} [options.data] Data that is posted with the resource.
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*/
Resource.delete = function (options) {
var resource = new Resource(options);
return resource.delete({
// Make copy of just the needed fields because headers can be passed to both the constructor and to fetch
responseType: options.responseType,
overrideMimeType: options.overrideMimeType,
data: options.data
});
};
/**
* Asynchronously gets headers the given resource. Returns a promise that will resolve to
* the result once loaded, or reject if the resource failed to load. The data is loaded
* using XMLHttpRequest, which means that in order to make requests to another origin,
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
*
* @param {Object} [options] Object with the following properties:
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
* @param {Object} [options.headers] Additional HTTP headers to send with the request, if any.
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*
*
* @example
* resource.head()
* .then(function(headers) {
* // use the data
* }).otherwise(function(error) {
* // an error occurred
* });
*
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
*/
Resource.prototype.head = function(options) {
options = defaultClone(options, {});
options.method = 'HEAD';
return this._makeRequest(options);
};
/**
* Creates a Resource from a URL and calls head() on it.
*
* @param {String|Object} options A url or an object with the following properties
* @param {String} options.url The url of the resource.
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*/
Resource.head = function (options) {
var resource = new Resource(options);
return resource.head({
// Make copy of just the needed fields because headers can be passed to both the constructor and to fetch
responseType: options.responseType,
overrideMimeType: options.overrideMimeType
});
};
/**
* Asynchronously gets options the given resource. Returns a promise that will resolve to
* the result once loaded, or reject if the resource failed to load. The data is loaded
* using XMLHttpRequest, which means that in order to make requests to another origin,
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
*
* @param {Object} [options] Object with the following properties:
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
* @param {Object} [options.headers] Additional HTTP headers to send with the request, if any.
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*
*
* @example
* resource.options()
* .then(function(headers) {
* // use the data
* }).otherwise(function(error) {
* // an error occurred
* });
*
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
*/
Resource.prototype.options = function(options) {
options = defaultClone(options, {});
options.method = 'OPTIONS';
return this._makeRequest(options);
};
/**
* Creates a Resource from a URL and calls options() on it.
*
* @param {String|Object} options A url or an object with the following properties
* @param {String} options.url The url of the resource.
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*/
Resource.options = function (options) {
var resource = new Resource(options);
return resource.options({
// Make copy of just the needed fields because headers can be passed to both the constructor and to fetch
responseType: options.responseType,
overrideMimeType: options.overrideMimeType
});
};
/**
* Asynchronously posts data to the given resource. Returns a promise that will resolve to
* the result once loaded, or reject if the resource failed to load. The data is loaded
* using XMLHttpRequest, which means that in order to make requests to another origin,
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
*
* @param {Object} data Data that is posted with the resource.
* @param {Object} [options] Object with the following properties:
* @param {Object} [options.data] Data that is posted with the resource.
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
* @param {Object} [options.headers] Additional HTTP headers to send with the request, if any.
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*
*
* @example
* resource.post(data)
* .then(function(result) {
* // use the result
* }).otherwise(function(error) {
* // an error occurred
* });
*
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
*/
Resource.prototype.post = function(data, options) {
Check.Check.defined('data', data);
options = defaultClone(options, {});
options.method = 'POST';
options.data = data;
return this._makeRequest(options);
};
/**
* Creates a Resource from a URL and calls post() on it.
*
* @param {Object} options A url or an object with the following properties
* @param {String} options.url The url of the resource.
* @param {Object} options.data Data that is posted with the resource.
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*/
Resource.post = function (options) {
var resource = new Resource(options);
return resource.post(options.data, {
// Make copy of just the needed fields because headers can be passed to both the constructor and to post
responseType: options.responseType,
overrideMimeType: options.overrideMimeType
});
};
/**
* Asynchronously puts data to the given resource. Returns a promise that will resolve to
* the result once loaded, or reject if the resource failed to load. The data is loaded
* using XMLHttpRequest, which means that in order to make requests to another origin,
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
*
* @param {Object} data Data that is posted with the resource.
* @param {Object} [options] Object with the following properties:
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
* @param {Object} [options.headers] Additional HTTP headers to send with the request, if any.
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*
*
* @example
* resource.put(data)
* .then(function(result) {
* // use the result
* }).otherwise(function(error) {
* // an error occurred
* });
*
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
*/
Resource.prototype.put = function(data, options) {
Check.Check.defined('data', data);
options = defaultClone(options, {});
options.method = 'PUT';
options.data = data;
return this._makeRequest(options);
};
/**
* Creates a Resource from a URL and calls put() on it.
*
* @param {Object} options A url or an object with the following properties
* @param {String} options.url The url of the resource.
* @param {Object} options.data Data that is posted with the resource.
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*/
Resource.put = function (options) {
var resource = new Resource(options);
return resource.put(options.data, {
// Make copy of just the needed fields because headers can be passed to both the constructor and to post
responseType: options.responseType,
overrideMimeType: options.overrideMimeType
});
};
/**
* Asynchronously patches data to the given resource. Returns a promise that will resolve to
* the result once loaded, or reject if the resource failed to load. The data is loaded
* using XMLHttpRequest, which means that in order to make requests to another origin,
* the server must have Cross-Origin Resource Sharing (CORS) headers enabled.
*
* @param {Object} data Data that is posted with the resource.
* @param {Object} [options] Object with the following properties:
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
* @param {Object} [options.headers] Additional HTTP headers to send with the request, if any.
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*
*
* @example
* resource.patch(data)
* .then(function(result) {
* // use the result
* }).otherwise(function(error) {
* // an error occurred
* });
*
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
* @see {@link http://wiki.commonjs.org/wiki/Promises/A|CommonJS Promises/A}
*/
Resource.prototype.patch = function(data, options) {
Check.Check.defined('data', data);
options = defaultClone(options, {});
options.method = 'PATCH';
options.data = data;
return this._makeRequest(options);
};
/**
* Creates a Resource from a URL and calls patch() on it.
*
* @param {Object} options A url or an object with the following properties
* @param {String} options.url The url of the resource.
* @param {Object} options.data Data that is posted with the resource.
* @param {Object} [options.queryParameters] An object containing query parameters that will be sent when retrieving the resource.
* @param {Object} [options.templateValues] Key/Value pairs that are used to replace template values (eg. {x}).
* @param {Object} [options.headers={}] Additional HTTP headers that will be sent.
* @param {DefaultProxy} [options.proxy] A proxy to be used when loading the resource.
* @param {Resource~RetryCallback} [options.retryCallback] The Function to call when a request for this resource fails. If it returns true, the request will be retried.
* @param {Number} [options.retryAttempts=0] The number of times the retryCallback should be called before giving up.
* @param {Request} [options.request] A Request object that will be used. Intended for internal use only.
* @param {String} [options.responseType] The type of response. This controls the type of item returned.
* @param {String} [options.overrideMimeType] Overrides the MIME type returned by the server.
* @returns {Promise.<Object>|undefined} a promise that will resolve to the requested data when loaded. Returns undefined if <code>request.throttle</code> is true and the request does not have high enough priority.
*/
Resource.patch = function (options) {
var resource = new Resource(options);
return resource.patch(options.data, {
// Make copy of just the needed fields because headers can be passed to both the constructor and to post
responseType: options.responseType,
overrideMimeType: options.overrideMimeType
});
};
/**
* Contains implementations of functions that can be replaced for testing
*
* @private
*/
Resource._Implementations = {};
function loadImageElement(url, crossOrigin, deferred) {
var image = new Image();
image.onload = function() {
deferred.resolve(image);
};
image.onerror = function(e) {
deferred.reject(e);
};
if (crossOrigin) {
if (TrustedServers.contains(url)) {
image.crossOrigin = 'use-credentials';
} else {
image.crossOrigin = '';
}
}
image.src = url;
}
Resource._Implementations.createImage = function(request, crossOrigin, deferred, flipY, preferImageBitmap) {
var url = request.url;
// Passing an Image to createImageBitmap will force it to run on the main thread
// since DOM elements don't exist on workers. We convert it to a blob so it's non-blocking.
// See:
// https://bugzilla.mozilla.org/show_bug.cgi?id=1044102#c38
// https://bugs.chromium.org/p/chromium/issues/detail?id=580202#c10
Resource.supportsImageBitmapOptions()
.then(function(supportsImageBitmap) {
// We can only use ImageBitmap if we can flip on decode.
// See: https://github.com/CesiumGS/cesium/pull/7579#issuecomment-466146898
if (!(supportsImageBitmap && preferImageBitmap)) {
loadImageElement(url, crossOrigin, deferred);
return;
}
var responseType = 'blob';
var method = 'GET';
var xhrDeferred = when.when.defer();
var xhr = Resource._Implementations.loadWithXhr(
url,
responseType,
method,
undefined,
undefined,
xhrDeferred,
undefined,
undefined,
undefined
);
if (when.defined(xhr) && when.defined(xhr.abort)) {
request.cancelFunction = function() {
xhr.abort();
};
}
return xhrDeferred.promise.then(function(blob) {
if (!when.defined(blob)) {
deferred.reject(new RuntimeError.RuntimeError('Successfully retrieved ' + url + ' but it contained no content.'));
return;
}
return Resource.createImageBitmapFromBlob(blob, {
flipY: flipY,
premultiplyAlpha: false
});
}).then(deferred.resolve);
})
.otherwise(deferred.reject);
};
/**
* Wrapper for createImageBitmap
*
* @private
*/
Resource.createImageBitmapFromBlob = function(blob, options) {
Check.Check.defined('options', options);
Check.Check.typeOf.bool('options.flipY', options.flipY);
Check.Check.typeOf.bool('options.premultiplyAlpha', options.premultiplyAlpha);
return createImageBitmap(blob, {
imageOrientation: options.flipY ? 'flipY' : 'none',
premultiplyAlpha: options.premultiplyAlpha ? 'premultiply' : 'none'
});
};
function decodeResponse(loadWithHttpResponse, responseType) {
switch (responseType) {
case 'text':
return loadWithHttpResponse.toString('utf8');
case 'json':
return JSON.parse(loadWithHttpResponse.toString('utf8'));
default:
return new Uint8Array(loadWithHttpResponse).buffer;
}
}
function loadWithHttpRequest(url, responseType, method, data, headers, deferred, overrideMimeType) {
// Note: only the 'json' and 'text' responseTypes transforms the loaded buffer
var URL = require('url').parse(url); // eslint-disable-line
var http = URL.protocol === 'https:' ? require('https') : require('http'); // eslint-disable-line
var zlib = require('zlib'); // eslint-disable-line
var options = {
protocol : URL.protocol,
hostname : URL.hostname,
port : URL.port,
path : URL.path,
query : URL.query,
method : method,
headers : headers
};
http.request(options)
.on('response', function(res) {
if (res.statusCode < 200 || res.statusCode >= 300) {
deferred.reject(new RequestErrorEvent(res.statusCode, res, res.headers));
return;
}
var chunkArray = [];
res.on('data', function(chunk) {
chunkArray.push(chunk);
});
res.on('end', function() {
var result = Buffer.concat(chunkArray); // eslint-disable-line
if (res.headers['content-encoding'] === 'gzip') {
zlib.gunzip(result, function(error, resultUnzipped) {
if (error) {
deferred.reject(new RuntimeError.RuntimeError('Error decompressing response.'));
} else {
deferred.resolve(decodeResponse(resultUnzipped, responseType));
}
});
} else {
deferred.resolve(decodeResponse(result, responseType));
}
});
}).on('error', function(e) {
deferred.reject(new RequestErrorEvent());
}).end();
}
var noXMLHttpRequest = typeof XMLHttpRequest === 'undefined';
Resource._Implementations.loadWithXhr = function(url, responseType, method, data, headers, deferred, overrideMimeType) {
var dataUriRegexResult = dataUriRegex$1.exec(url);
if (dataUriRegexResult !== null) {
deferred.resolve(decodeDataUri(dataUriRegexResult, responseType));
return;
}
if (noXMLHttpRequest) {
loadWithHttpRequest(url, responseType, method, data, headers, deferred);
return;
}
var xhr = new XMLHttpRequest();
if (TrustedServers.contains(url)) {
xhr.withCredentials = true;
}
url = url.replace(/{/g, '%7B').replace(/}/g, '%7D');
xhr.open(method, url, true);
if (when.defined(overrideMimeType) && when.defined(xhr.overrideMimeType)) {
xhr.overrideMimeType(overrideMimeType);
}
if (when.defined(headers)) {
for (var key in headers) {
if (headers.hasOwnProperty(key)) {
xhr.setRequestHeader(key, headers[key]);
}
}
}
if (when.defined(responseType)) {
xhr.responseType = responseType;
}
// While non-standard, file protocol always returns a status of 0 on success
var localFile = false;
if (typeof url === 'string') {
localFile = (url.indexOf('file://') === 0) || (typeof window !== 'undefined' && window.location.origin === 'file://');
}
xhr.onload = function() {
if ((xhr.status < 200 || xhr.status >= 300) && !(localFile && xhr.status === 0)) {
deferred.reject(new RequestErrorEvent(xhr.status, xhr.response, xhr.getAllResponseHeaders()));
return;
}
var response = xhr.response;
var browserResponseType = xhr.responseType;
if (method === 'HEAD' || method === 'OPTIONS') {
var responseHeaderString = xhr.getAllResponseHeaders();
var splitHeaders = responseHeaderString.trim().split(/[\r\n]+/);
var responseHeaders = {};
splitHeaders.forEach(function (line) {
var parts = line.split(': ');
var header = parts.shift();
responseHeaders[header] = parts.join(': ');
});
deferred.resolve(responseHeaders);
return;
}
//All modern browsers will go into either the first or second if block or last else block.
//Other code paths support older browsers that either do not support the supplied responseType
//or do not support the xhr.response property.
if (xhr.status === 204) {
// accept no content
deferred.resolve();
} else if (when.defined(response) && (!when.defined(responseType) || (browserResponseType === responseType))) {
deferred.resolve(response);
} else if ((responseType === 'json') && typeof response === 'string') {
try {
deferred.resolve(JSON.parse(response));
} catch (e) {
deferred.reject(e);
}
} else if ((browserResponseType === '' || browserResponseType === 'document') && when.defined(xhr.responseXML) && xhr.responseXML.hasChildNodes()) {
deferred.resolve(xhr.responseXML);
} else if ((browserResponseType === '' || browserResponseType === 'text') && when.defined(xhr.responseText)) {
deferred.resolve(xhr.responseText);
} else {
deferred.reject(new RuntimeError.RuntimeError('Invalid XMLHttpRequest response type.'));
}
};
xhr.onerror = function(e) {
deferred.reject(new RequestErrorEvent());
};
xhr.send(data);
return xhr;
};
Resource._Implementations.loadAndExecuteScript = function(url, functionName, deferred) {
return loadAndExecuteScript(url).otherwise(deferred.reject);
};
/**
* The default implementations
*
* @private
*/
Resource._DefaultImplementations = {};
Resource._DefaultImplementations.createImage = Resource._Implementations.createImage;
Resource._DefaultImplementations.loadWithXhr = Resource._Implementations.loadWithXhr;
Resource._DefaultImplementations.loadAndExecuteScript = Resource._Implementations.loadAndExecuteScript;
/**
* A resource instance initialized to the current browser location
*
* @type {Resource}
* @constant
*/
Resource.DEFAULT = Object.freeze(new Resource({
url: (typeof document === 'undefined') ? '' : document.location.href.split('?')[0]
}));
/*global CESIUM_BASE_URL*/
var cesiumScriptRegex = /((?:.*\/)|^)Cesium\.js$/;
function getBaseUrlFromCesiumScript() {
var scripts = document.getElementsByTagName('script');
for ( var i = 0, len = scripts.length; i < len; ++i) {
var src = scripts[i].getAttribute('src');
var result = cesiumScriptRegex.exec(src);
if (result !== null) {
return result[1];
}
}
return undefined;
}
var a$1;
function tryMakeAbsolute(url) {
if (typeof document === 'undefined') {
//Node.js and Web Workers. In both cases, the URL will already be absolute.
return url;
}
if (!when.defined(a$1)) {
a$1 = document.createElement('a');
}
a$1.href = url;
// IE only absolutizes href on get, not set
a$1.href = a$1.href; // eslint-disable-line no-self-assign
return a$1.href;
}
var baseResource;
function getCesiumBaseUrl() {
if (when.defined(baseResource)) {
return baseResource;
}
var baseUrlString;
if (typeof CESIUM_BASE_URL !== 'undefined') {
baseUrlString = CESIUM_BASE_URL;
} else if (typeof define === 'object' && when.defined(define.amd) && !define.amd.toUrlUndefined && when.defined(require.toUrl)) {
baseUrlString = getAbsoluteUri('..', buildModuleUrl('Core/buildModuleUrl.js'));
} else {
baseUrlString = getBaseUrlFromCesiumScript();
}
//>>includeStart('debug', pragmas.debug);
if (!when.defined(baseUrlString)) {
throw new Check.DeveloperError('Unable to determine Cesium base URL automatically, try defining a global variable called CESIUM_BASE_URL.');
}
//>>includeEnd('debug');
baseResource = new Resource({
url: tryMakeAbsolute(baseUrlString)
});
baseResource.appendForwardSlash();
return baseResource;
}
function buildModuleUrlFromRequireToUrl(moduleID) {
//moduleID will be non-relative, so require it relative to this module, in Core.
return tryMakeAbsolute(require.toUrl('../' + moduleID));
}
function buildModuleUrlFromBaseUrl(moduleID) {
var resource = getCesiumBaseUrl().getDerivedResource({
url: moduleID
});
return resource.url;
}
var implementation;
/**
* Given a non-relative moduleID, returns an absolute URL to the file represented by that module ID,
* using, in order of preference, require.toUrl, the value of a global CESIUM_BASE_URL, or
* the base URL of the Cesium.js script.
*
* @private
*/
function buildModuleUrl(moduleID) {
if (!when.defined(implementation)) {
//select implementation
if (typeof define === 'object' && when.defined(define.amd) && !define.amd.toUrlUndefined && when.defined(require.toUrl)) {
implementation = buildModuleUrlFromRequireToUrl;
} else {
implementation = buildModuleUrlFromBaseUrl;
}
}
var url = implementation(moduleID);
return url;
}
// exposed for testing
buildModuleUrl._cesiumScriptRegex = cesiumScriptRegex;
buildModuleUrl._buildModuleUrlFromBaseUrl = buildModuleUrlFromBaseUrl;
buildModuleUrl._clearBaseResource = function() {
baseResource = undefined;
};
/**
* Sets the base URL for resolving modules.
* @param {String} value The new base URL.
*/
buildModuleUrl.setBaseUrl = function(value) {
baseResource = Resource.DEFAULT.getDerivedResource({
url: value
});
};
/**
* Gets the base URL for resolving modules.
*/
buildModuleUrl.getCesiumBaseUrl = getCesiumBaseUrl;
exports.Resource = Resource;
exports.buildModuleUrl = buildModuleUrl;
exports.deprecationWarning = deprecationWarning;
exports.oneTimeWarning = oneTimeWarning;
});