IonResource

new Cesium.IonResource(endpoint, endpointResource)
@cesium/engine/Source/Core/IonResource.js 26

A Resource instance that encapsulates Cesium ion asset access. This object is normally not instantiated directly, use IonResource.fromAssetId.
Name Type Description
endpoint object The result of the Cesium ion asset endpoint service.
endpointResource Resource The resource used to retrieve the endpoint.
See:

Extends

Members

readonly credits : Array.<Credit>
@cesium/engine/Source/Core/IonResource.js 125

Gets the credits required for attribution of the asset.

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

The file extension of the resource.
Inherited From:

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.
Inherited From:

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

Additional HTTP headers that will be sent with the request.
Inherited From:

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

True if the Resource refers to a blob URI.
Inherited From:

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

True if the Resource refers to a cross origin URL.
Inherited From:

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

True if the Resource refers to a data URI.
Inherited From:

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

A proxy to be used when loading the resource.
Inherited From:

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

Query parameters appended to the url.
Inherited From:

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

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

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

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

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.
Inherited From:

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

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

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.
Inherited From:

Methods

static Cesium.IonResource.fromAssetId(assetId, options) → Promise.<IonResource>
@cesium/engine/Source/Core/IonResource.js 106

Asynchronously creates an instance.
Name Type Description
assetId number The Cesium ion asset id.
options object optional An object with the following properties:
Name Type Default Description
accessToken string Ion.defaultAccessToken optional The access token to use.
server string | Resource Ion.defaultServer optional The resource to the Cesium ion API server.
Returns:
A Promise to am instance representing the Cesium ion Asset.
Examples:
// Load a Cesium3DTileset with asset ID of 124624234
try {
  const resource = await Cesium.IonResource.fromAssetId(124624234);
  const tileset = await Cesium.Cesium3DTileset.fromUrl(resource);
  scene.primitives.add(tileset);
} catch (error) {
  console.error(`Error creating tileset: ${error}`);
}
//Load a CZML file with asset ID of 10890
Cesium.IonResource.fromAssetId(10890)
  .then(function (resource) {
    viewer.dataSources.add(Cesium.CzmlDataSource.load(resource));
  });

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

Appends a forward slash to the URL.
Inherited From:

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
Inherited From:

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.
Inherited From:

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.
Inherited From:
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.
Inherited From:
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.
Inherited From:
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.
Inherited From:
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.
Inherited From:
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.
Inherited From:
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.
Inherited From:
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.
Inherited From:
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.
Inherited From:
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
Inherited From:

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.
Inherited From:

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.
Inherited From:
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.
Inherited From:
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.
Inherited From:
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.
Inherited From:
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.
Inherited From:
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.
Inherited From:
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.
Inherited From:

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.
Inherited From:

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
Inherited From:
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