Resource

new Cesium.Resource(options)
@cesium/engine/Source/Core/Resource.js 93

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.
Name Type Description
options string | Resource.ConstructorOptions A url or an object describing initialization options
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;
      })
      .catch(function() {
        return false;
      });
  }

  return false;
}

const 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
});

Members

static constant Cesium.Resource.DEFAULT : Resource
@cesium/engine/Source/Core/Resource.js 2258

A resource instance initialized to the current browser location

static readonly Cesium.Resource.isBlobSupported : boolean
@cesium/engine/Source/Core/Resource.js 265

Returns true if blobs are supported.

readonly extension : string
@cesium/engine/Source/Core/Resource.js 324

The file extension of the resource.

hasHeaders : boolean
@cesium/engine/Source/Core/Resource.js 372

True if the Resource has request headers. This is equivalent to checking if the headers property has any keys.

headers : object
@cesium/engine/Source/Core/Resource.js 114

Additional HTTP headers that will be sent with the request.

isBlobUri : boolean
@cesium/engine/Source/Core/Resource.js 348

True if the Resource refers to a blob URI.

isCrossOriginUrl : boolean
@cesium/engine/Source/Core/Resource.js 360

True if the Resource refers to a cross origin URL.

isDataUri : boolean
@cesium/engine/Source/Core/Resource.js 336

True if the Resource refers to a data URI.

proxy : Proxy
@cesium/engine/Source/Core/Resource.js 128

A proxy to be used when loading the resource.

readonly queryParameters : object
@cesium/engine/Source/Core/Resource.js 281

Query parameters appended to the url.

request : Request
@cesium/engine/Source/Core/Resource.js 121

A Request object that will be used. Intended for internal use only.

retryAttempts : number
@cesium/engine/Source/Core/Resource.js 142

The number of times the retryCallback should be called before giving up.

retryCallback : function
@cesium/engine/Source/Core/Resource.js 135

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.

readonly templateValues : object
@cesium/engine/Source/Core/Resource.js 295

The key/value pairs used to replace template parameters in the url.

url : string
@cesium/engine/Source/Core/Resource.js 307

The url to the resource with template values replaced, query string appended and encoded by proxy if one was set.

Methods

static Cesium.Resource.delete(options) → Promise.<any>|undefined
@cesium/engine/Source/Core/Resource.js 1602

Creates a Resource from a URL and calls delete() on it.
Name Type Description
options string | object A url or an object with the following properties
Name Type Default Description
url string The url of the resource.
data object optional Data that is posted with the resource.
queryParameters object optional An object containing query parameters that will be sent when retrieving the resource.
templateValues object optional Key/Value pairs that are used to replace template values (eg. {x}).
headers object {} optional Additional HTTP headers that will be sent.
proxy Proxy optional A proxy to be used when loading the resource.
retryCallback Resource.RetryCallback optional The Function to call when a request for this resource fails. If it returns true, the request will be retried.
retryAttempts number 0 optional The number of times the retryCallback should be called before giving up.
request Request optional A Request object that will be used. Intended for internal use only.
responseType string optional The type of response. This controls the type of item returned.
overrideMimeType string optional Overrides the MIME type returned by the server.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.

static Cesium.Resource.fetch(options) → Promise.<any>|undefined
@cesium/engine/Source/Core/Resource.js 1545

Creates a Resource from a URL and calls fetch() on it.
Name Type Description
options string | object A url or an object with the following properties
Name Type Default Description
url string The url of the resource.
queryParameters object optional An object containing query parameters that will be sent when retrieving the resource.
templateValues object optional Key/Value pairs that are used to replace template values (eg. {x}).
headers object {} optional Additional HTTP headers that will be sent.
proxy Proxy optional A proxy to be used when loading the resource.
retryCallback Resource.RetryCallback optional The Function to call when a request for this resource fails. If it returns true, the request will be retried.
retryAttempts number 0 optional The number of times the retryCallback should be called before giving up.
request Request optional A Request object that will be used. Intended for internal use only.
responseType string optional The type of response. This controls the type of item returned.
overrideMimeType string optional Overrides the MIME type returned by the server.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.

static Cesium.Resource.fetchArrayBuffer(options) → Promise.<ArrayBuffer>|undefined
@cesium/engine/Source/Core/Resource.js 821

Creates a Resource and calls fetchArrayBuffer() on it.
Name Type Description
options string | object A url or an object with the following properties
Name Type Default Description
url string The url of the resource.
queryParameters object optional An object containing query parameters that will be sent when retrieving the resource.
templateValues object optional Key/Value pairs that are used to replace template values (eg. {x}).
headers object {} optional Additional HTTP headers that will be sent.
proxy Proxy optional A proxy to be used when loading the resource.
retryCallback Resource.RetryCallback optional The Function to call when a request for this resource fails. If it returns true, the request will be retried.
retryAttempts number 0 optional The number of times the retryCallback should be called before giving up.
request Request optional A Request object that will be used. Intended for internal use only.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.

static Cesium.Resource.fetchBlob(options) → Promise.<Blob>|undefined
@cesium/engine/Source/Core/Resource.js 865

Creates a Resource and calls fetchBlob() on it.
Name Type Description
options string | object A url or an object with the following properties
Name Type Default Description
url string The url of the resource.
queryParameters object optional An object containing query parameters that will be sent when retrieving the resource.
templateValues object optional Key/Value pairs that are used to replace template values (eg. {x}).
headers object {} optional Additional HTTP headers that will be sent.
proxy Proxy optional A proxy to be used when loading the resource.
retryCallback Resource.RetryCallback optional The Function to call when a request for this resource fails. If it returns true, the request will be retried.
retryAttempts number 0 optional The number of times the retryCallback should be called before giving up.
request Request optional A Request object that will be used. Intended for internal use only.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.

static Cesium.Resource.fetchImage(options) → Promise.<(ImageBitmap|HTMLImageElement)>|undefined
@cesium/engine/Source/Core/Resource.js 1084

Creates a Resource and calls fetchImage() on it.
Name Type Description
options string | object A url or an object with the following properties
Name Type Default Description
url string The url of the resource.
queryParameters object optional An object containing query parameters that will be sent when retrieving the resource.
templateValues object optional Key/Value pairs that are used to replace template values (eg. {x}).
headers object {} optional Additional HTTP headers that will be sent.
proxy Proxy optional A proxy to be used when loading the resource.
flipY boolean false optional Whether to vertically flip the image during fetch and decode. Only applies when requesting an image and the browser supports createImageBitmap.
retryCallback Resource.RetryCallback optional The Function to call when a request for this resource fails. If it returns true, the request will be retried.
retryAttempts number 0 optional The number of times the retryCallback should be called before giving up.
request Request optional A Request object that will be used. Intended for internal use only.
preferBlob boolean false optional If true, we will load the image via a blob.
preferImageBitmap boolean false optional If true, image will be decoded during fetch and an ImageBitmap is returned.
skipColorSpaceConversion boolean false optional If true, any custom gamma or color profiles in the image will be ignored. Only applies when requesting an image and the browser supports createImageBitmap.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.

static Cesium.Resource.fetchJson(options) → Promise.<any>|undefined
@cesium/engine/Source/Core/Resource.js 1201

Creates a Resource and calls fetchJson() on it.
Name Type Description
options string | object A url or an object with the following properties
Name Type Default Description
url string The url of the resource.
queryParameters object optional An object containing query parameters that will be sent when retrieving the resource.
templateValues object optional Key/Value pairs that are used to replace template values (eg. {x}).
headers object {} optional Additional HTTP headers that will be sent.
proxy Proxy optional A proxy to be used when loading the resource.
retryCallback Resource.RetryCallback optional The Function to call when a request for this resource fails. If it returns true, the request will be retried.
retryAttempts number 0 optional The number of times the retryCallback should be called before giving up.
request Request optional A Request object that will be used. Intended for internal use only.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.

static Cesium.Resource.fetchJsonp(options) → Promise.<any>|undefined
@cesium/engine/Source/Core/Resource.js 1353

Creates a Resource from a URL and calls fetchJsonp() on it.
Name Type Description
options string | object A url or an object with the following properties
Name Type Default Description
url string The url of the resource.
queryParameters object optional An object containing query parameters that will be sent when retrieving the resource.
templateValues object optional Key/Value pairs that are used to replace template values (eg. {x}).
headers object {} optional Additional HTTP headers that will be sent.
proxy Proxy optional A proxy to be used when loading the resource.
retryCallback Resource.RetryCallback optional The Function to call when a request for this resource fails. If it returns true, the request will be retried.
retryAttempts number 0 optional The number of times the retryCallback should be called before giving up.
request Request optional A Request object that will be used. Intended for internal use only.
callbackParameterName string 'callback' optional The callback parameter name that the server expects.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.

static Cesium.Resource.fetchText(options) → Promise.<string>|undefined
@cesium/engine/Source/Core/Resource.js 1140

Creates a Resource and calls fetchText() on it.
Name Type Description
options string | object A url or an object with the following properties
Name Type Default Description
url string The url of the resource.
queryParameters object optional An object containing query parameters that will be sent when retrieving the resource.
templateValues object optional Key/Value pairs that are used to replace template values (eg. {x}).
headers object {} optional Additional HTTP headers that will be sent.
proxy Proxy optional A proxy to be used when loading the resource.
retryCallback Resource.RetryCallback optional The Function to call when a request for this resource fails. If it returns true, the request will be retried.
retryAttempts number 0 optional The number of times the retryCallback should be called before giving up.
request Request optional A Request object that will be used. Intended for internal use only.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.

static Cesium.Resource.fetchXML(options) → Promise.<XMLDocument>|undefined
@cesium/engine/Source/Core/Resource.js 1250

Creates a Resource and calls fetchXML() on it.
Name Type Description
options string | object A url or an object with the following properties
Name Type Default Description
url string The url of the resource.
queryParameters object optional An object containing query parameters that will be sent when retrieving the resource.
templateValues object optional Key/Value pairs that are used to replace template values (eg. {x}).
headers object {} optional Additional HTTP headers that will be sent.
proxy Proxy optional A proxy to be used when loading the resource.
retryCallback Resource.RetryCallback optional The Function to call when a request for this resource fails. If it returns true, the request will be retried.
retryAttempts number 0 optional The number of times the retryCallback should be called before giving up.
request Request optional A Request object that will be used. Intended for internal use only.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.

static Cesium.Resource.head(options) → Promise.<any>|undefined
@cesium/engine/Source/Core/Resource.js 1659

Creates a Resource from a URL and calls head() on it.
Name Type Description
options string | object A url or an object with the following properties
Name Type Default Description
url string The url of the resource.
queryParameters object optional An object containing query parameters that will be sent when retrieving the resource.
templateValues object optional Key/Value pairs that are used to replace template values (eg. {x}).
headers object {} optional Additional HTTP headers that will be sent.
proxy Proxy optional A proxy to be used when loading the resource.
retryCallback Resource.RetryCallback optional The Function to call when a request for this resource fails. If it returns true, the request will be retried.
retryAttempts number 0 optional The number of times the retryCallback should be called before giving up.
request Request optional A Request object that will be used. Intended for internal use only.
responseType string optional The type of response. This controls the type of item returned.
overrideMimeType string optional Overrides the MIME type returned by the server.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.

static Cesium.Resource.options(options) → Promise.<any>|undefined
@cesium/engine/Source/Core/Resource.js 1715

Creates a Resource from a URL and calls options() on it.
Name Type Description
options string | object A url or an object with the following properties
Name Type Default Description
url string The url of the resource.
queryParameters object optional An object containing query parameters that will be sent when retrieving the resource.
templateValues object optional Key/Value pairs that are used to replace template values (eg. {x}).
headers object {} optional Additional HTTP headers that will be sent.
proxy Proxy optional A proxy to be used when loading the resource.
retryCallback Resource.RetryCallback optional The Function to call when a request for this resource fails. If it returns true, the request will be retried.
retryAttempts number 0 optional The number of times the retryCallback should be called before giving up.
request Request optional A Request object that will be used. Intended for internal use only.
responseType string optional The type of response. This controls the type of item returned.
overrideMimeType string optional Overrides the MIME type returned by the server.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.

static Cesium.Resource.patch(options) → Promise.<any>|undefined
@cesium/engine/Source/Core/Resource.js 1899

Creates a Resource from a URL and calls patch() on it.
Name Type Description
options object A url or an object with the following properties
Name Type Default Description
url string The url of the resource.
data object Data that is posted with the resource.
queryParameters object optional An object containing query parameters that will be sent when retrieving the resource.
templateValues object optional Key/Value pairs that are used to replace template values (eg. {x}).
headers object {} optional Additional HTTP headers that will be sent.
proxy Proxy optional A proxy to be used when loading the resource.
retryCallback Resource.RetryCallback optional The Function to call when a request for this resource fails. If it returns true, the request will be retried.
retryAttempts number 0 optional The number of times the retryCallback should be called before giving up.
request Request optional A Request object that will be used. Intended for internal use only.
responseType string optional The type of response. This controls the type of item returned.
overrideMimeType string optional Overrides the MIME type returned by the server.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.

static Cesium.Resource.post(options) → Promise.<any>|undefined
@cesium/engine/Source/Core/Resource.js 1777

Creates a Resource from a URL and calls post() on it.
Name Type Description
options object A url or an object with the following properties
Name Type Default Description
url string The url of the resource.
data object Data that is posted with the resource.
queryParameters object optional An object containing query parameters that will be sent when retrieving the resource.
templateValues object optional Key/Value pairs that are used to replace template values (eg. {x}).
headers object {} optional Additional HTTP headers that will be sent.
proxy Proxy optional A proxy to be used when loading the resource.
retryCallback Resource.RetryCallback optional The Function to call when a request for this resource fails. If it returns true, the request will be retried.
retryAttempts number 0 optional The number of times the retryCallback should be called before giving up.
request Request optional A Request object that will be used. Intended for internal use only.
responseType string optional The type of response. This controls the type of item returned.
overrideMimeType string optional Overrides the MIME type returned by the server.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.

static Cesium.Resource.put(options) → Promise.<any>|undefined
@cesium/engine/Source/Core/Resource.js 1838

Creates a Resource from a URL and calls put() on it.
Name Type Description
options object A url or an object with the following properties
Name Type Default Description
url string The url of the resource.
data object Data that is posted with the resource.
queryParameters object optional An object containing query parameters that will be sent when retrieving the resource.
templateValues object optional Key/Value pairs that are used to replace template values (eg. {x}).
headers object {} optional Additional HTTP headers that will be sent.
proxy Proxy optional A proxy to be used when loading the resource.
retryCallback Resource.RetryCallback optional The Function to call when a request for this resource fails. If it returns true, the request will be retried.
retryAttempts number 0 optional The number of times the retryCallback should be called before giving up.
request Request optional A Request object that will be used. Intended for internal use only.
responseType string optional The type of response. This controls the type of item returned.
overrideMimeType string optional Overrides the MIME type returned by the server.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.

appendForwardSlash()
@cesium/engine/Source/Core/Resource.js 778

Appends a forward slash to the URL.

appendQueryParameters(params)
@cesium/engine/Source/Core/Resource.js 623

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.
Name Type Description
params object The query parameters

clone(result) → Resource
@cesium/engine/Source/Core/Resource.js 735

Duplicates a Resource instance.
Name Type Description
result Resource optional The object onto which to store the result.
Returns:
The modified result parameter or a new Resource instance if one was not provided.

delete(options) → Promise.<any>|undefined
@cesium/engine/Source/Core/Resource.js 1578

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.
Name Type Description
options object optional Object with the following properties:
Name Type Description
responseType string optional The type of response. This controls the type of item returned.
headers object optional Additional HTTP headers to send with the request, if any.
overrideMimeType string optional Overrides the MIME type returned by the server.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.
Example:
resource.delete()
  .then(function(body) {
      // use the data
  }).catch(function(error) {
      // an error occurred
  });
See:

fetch(options) → Promise.<any>|undefined
@cesium/engine/Source/Core/Resource.js 1522

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.
Name Type Description
options object optional Object with the following properties:
Name Type Description
responseType string optional The type of response. This controls the type of item returned.
headers object optional Additional HTTP headers to send with the request, if any.
overrideMimeType string optional Overrides the MIME type returned by the server.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.
Example:
resource.fetch()
  .then(function(body) {
      // use the data
  }).catch(function(error) {
      // an error occurred
  });
See:

fetchArrayBuffer() → Promise.<ArrayBuffer>|undefined
@cesium/engine/Source/Core/Resource.js 801

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:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle 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
}).catch(function(error) {
    // an error occurred
});
See:

fetchBlob() → Promise.<Blob>|undefined
@cesium/engine/Source/Core/Resource.js 845

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:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle 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
}).catch(function(error) {
    // an error occurred
});
See:

fetchImage(options) → Promise.<(ImageBitmap|HTMLImageElement)>|undefined
@cesium/engine/Source/Core/Resource.js 899

Asynchronously loads the given image resource. Returns a promise that will resolve to an ImageBitmap if preferImageBitmap is true and the browser supports createImageBitmap or otherwise an Image once loaded, or reject if the image failed to load.
Name Type Description
options object optional An object with the following properties.
Name Type Default Description
preferBlob boolean false optional If true, we will load the image via a blob.
preferImageBitmap boolean false optional If true, image will be decoded during fetch and an ImageBitmap is returned.
flipY boolean false optional If true, image will be vertically flipped during decode. Only applies if the browser supports createImageBitmap.
skipColorSpaceConversion boolean false optional If true, any custom gamma or color profiles in the image will be ignored. Only applies if the browser supports createImageBitmap.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle 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
}).catch(function(error) {
    // an error occurred
});

// load several images in parallel
Promise.all([resource1.fetchImage(), resource2.fetchImage()]).then(function(images) {
    // images is an array containing all the loaded images
});
See:

fetchJson() → Promise.<any>|undefined
@cesium/engine/Source/Core/Resource.js 1167

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:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.
Example:
resource.fetchJson().then(function(jsonData) {
    // Do something with the JSON object
}).catch(function(error) {
    // an error occurred
});
See:

fetchJsonp(callbackParameterName) → Promise.<any>|undefined
@cesium/engine/Source/Core/Resource.js 1272

Requests a resource using JSONP.
Name Type Default Description
callbackParameterName string 'callback' optional The callback parameter name that the server expects.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle 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
}).catch(function(error) {
    // an error occurred
});
See:

fetchText() → Promise.<string>|undefined
@cesium/engine/Source/Core/Resource.js 1120

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:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.
Example:
// load text from a URL, setting a custom header
const 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
}).catch(function(error) {
    // an error occurred
});
See:

fetchXML() → Promise.<XMLDocument>|undefined
@cesium/engine/Source/Core/Resource.js 1229

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:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle 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
}).catch(function(error) {
    // an error occurred
});
See:

getBaseUri(includeQuery) → string
@cesium/engine/Source/Core/Resource.js 771

Returns the base path of the Resource.
Name Type Default Description
includeQuery boolean false optional Whether or not to include the query string and fragment form the uri
Returns:
The base URI of the resource

getDerivedResource(options) → Resource
@cesium/engine/Source/Core/Resource.js 662

Returns a resource relative to the current instance. All properties remain the same as the current instance unless overridden in options.
Name Type Description
options object An object with the following properties
Name Type Default Description
url string optional The url that will be resolved relative to the url of the current instance.
queryParameters object optional An object containing query parameters that will be combined with those of the current instance.
templateValues object optional Key/Value pairs that are used to replace template values (eg. {x}). These will be combined with those of the current instance.
headers object {} optional Additional HTTP headers that will be sent.
proxy Proxy optional A proxy to be used when loading the resource.
retryCallback Resource.RetryCallback optional The function to call when loading the resource fails.
retryAttempts number optional The number of times the retryCallback should be called before giving up.
request Request optional A Request object that will be used. Intended for internal use only.
preserveQueryParameters boolean false optional 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:
The resource derived from the current one.

getUrlComponent(query, proxy) → string
@cesium/engine/Source/Core/Resource.js 539

Returns the url, optional with the query string and processed by a proxy.
Name Type Default Description
query boolean false optional If true, the query string is included.
proxy boolean false optional If true, the url is processed by the proxy object, if defined.
Returns:
The url with all the requested components.
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.
Name Type Description
options object optional Object with the following properties:
Name Type Description
responseType string optional The type of response. This controls the type of item returned.
headers object optional Additional HTTP headers to send with the request, if any.
overrideMimeType string optional Overrides the MIME type returned by the server.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.
Example:
resource.head()
  .then(function(headers) {
      // use the data
  }).catch(function(error) {
      // an error occurred
  });
See:

options(options) → Promise.<any>|undefined
@cesium/engine/Source/Core/Resource.js 1692

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.
Name Type Description
options object optional Object with the following properties:
Name Type Description
responseType string optional The type of response. This controls the type of item returned.
headers object optional Additional HTTP headers to send with the request, if any.
overrideMimeType string optional Overrides the MIME type returned by the server.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.
Example:
resource.options()
  .then(function(headers) {
      // use the data
  }).catch(function(error) {
      // an error occurred
  });
See:

patch(data, options) → Promise.<any>|undefined
@cesium/engine/Source/Core/Resource.js 1872

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.
Name Type Description
data object Data that is posted with the resource.
options object optional Object with the following properties:
Name Type Description
responseType string optional The type of response. This controls the type of item returned.
headers object optional Additional HTTP headers to send with the request, if any.
overrideMimeType string optional Overrides the MIME type returned by the server.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.
Example:
resource.patch(data)
  .then(function(result) {
      // use the result
  }).catch(function(error) {
      // an error occurred
  });
See:

post(data, options) → Promise.<any>|undefined
@cesium/engine/Source/Core/Resource.js 1750

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.
Name Type Description
data object Data that is posted with the resource.
options object optional Object with the following properties:
Name Type Description
data object optional Data that is posted with the resource.
responseType string optional The type of response. This controls the type of item returned.
headers object optional Additional HTTP headers to send with the request, if any.
overrideMimeType string optional Overrides the MIME type returned by the server.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.
Example:
resource.post(data)
  .then(function(result) {
      // use the result
  }).catch(function(error) {
      // an error occurred
  });
See:

put(data, options) → Promise.<any>|undefined
@cesium/engine/Source/Core/Resource.js 1811

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.
Name Type Description
data object Data that is posted with the resource.
options object optional Object with the following properties:
Name Type Description
responseType string optional The type of response. This controls the type of item returned.
headers object optional Additional HTTP headers to send with the request, if any.
overrideMimeType string optional Overrides the MIME type returned by the server.
Returns:
a promise that will resolve to the requested data when loaded. Returns undefined if request.throttle is true and the request does not have high enough priority.
Example:
resource.put(data)
  .then(function(result) {
      // use the result
  }).catch(function(error) {
      // an error occurred
  });
See:

setQueryParameters(params, useAsDefault)
@cesium/engine/Source/Core/Resource.js 601

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.
Name Type Default Description
params object The query parameters
useAsDefault boolean false optional If true the params will be used as the default values, so they will only be set if they are undefined.

setTemplateValues(template, useAsDefault)
@cesium/engine/Source/Core/Resource.js 638

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.
Name Type Default Description
template object The template values
useAsDefault boolean false optional If true the values will be used as the default values, so they will only be set if they are undefined.

toString() → string
@cesium/engine/Source/Core/Resource.js 395

Override Object#toString so that implicit string conversion gives the complete URL represented by this Resource.
Returns:
The URL represented by this Resource

Type Definitions

Cesium.Resource.ConstructorOptions
@cesium/engine/Source/Core/Resource.js 39

Initialization options for the Resource constructor
Properties:
Name Type Attributes Default Description
url string The url of the resource.
queryParameters object <optional>
 An object containing query parameters that will be sent when retrieving the resource.
templateValues object <optional>
 Key/Value pairs that are used to replace template values (eg. {x}).
headers object <optional>
 {} Additional HTTP headers that will be sent.
proxy Proxy <optional>
 A proxy to be used when loading the resource.
retryCallback Resource.RetryCallback <optional>
 The Function to call when a request for this resource fails. If it returns true, the request will be retried.
retryAttempts number <optional>
 0 The number of times the retryCallback should be called before giving up.
request Request <optional>
 A Request object that will be used. Intended for internal use only.
parseUrl boolean <optional>
 true If true, parse the url for query parameters; otherwise store the url without change

Cesium.Resource.RetryCallback(resource, error) → boolean|Promise.<boolean>
@cesium/engine/Source/Core/Resource.js 2267

A function that returns the value of the property.
Name Type Description
resource Resource optional The resource that failed to load.
error RequestErrorEvent optional The error that occurred during the loading of the resource.
Returns:
If true or a promise that resolved to true, the resource will be retried. Otherwise the failure will be returned.
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