/
client.ts
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/
client.ts
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/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {Injectable} from '@angular/core';
import {Observable} from 'rxjs/Observable';
import {of } from 'rxjs/observable/of';
import {concatMap} from 'rxjs/operator/concatMap';
import {filter} from 'rxjs/operator/filter';
import {map} from 'rxjs/operator/map';
import {HttpHandler} from './backend';
import {HttpHeaders} from './headers';
import {HttpParams} from './params';
import {HttpRequest} from './request';
import {HttpEvent, HttpResponse} from './response';
/**
* Construct an instance of `HttpRequestOptions<T>` from a source `HttpMethodOptions` and
* the given `body`. Basically, this clones the object and adds the body.
*/
function addBody<T>(
options: {
headers?: HttpHeaders,
observe?: HttpObserve,
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'arraybuffer' | 'blob' | 'json' | 'text',
withCredentials?: boolean,
},
body: T | null): any {
return {
body,
headers: options.headers,
observe: options.observe,
params: options.params,
reportProgress: options.reportProgress,
responseType: options.responseType,
withCredentials: options.withCredentials,
};
}
/**
* @experimental
*/
export type HttpObserve = 'body' | 'events' | 'response';
/**
* Perform HTTP requests.
*
* `HttpClient` is available as an injectable class, with methods to perform HTTP requests.
* Each request method has multiple signatures, and the return type varies according to which
* signature is called (mainly the values of `observe` and `responseType`).
*
* @experimental
*/
@Injectable()
export class HttpClient {
constructor(private handler: HttpHandler) {}
/**
* Send the given `HttpRequest` and return a stream of `HttpEvents`.
*/
request<R>(req: HttpRequest<any>): Observable<HttpEvent<R>>;
/**
* Construct a request which interprets the body as an `ArrayBuffer` and returns it.
*
* @return an `Observable` of the body as an `ArrayBuffer`.
*/
request(method: string, url: string, options: {
body?: any,
headers?: HttpHeaders,
observe?: 'body',
params?: HttpParams,
reportProgress?: boolean,
responseType: 'arraybuffer', withCredentials?: boolean,
}): Observable<ArrayBuffer>;
/**
* Construct a request which interprets the body as a `Blob` and returns it.
*
* @return an `Observable` of the body as a `Blob`.
*/
request(method: string, url: string, options: {
body?: any,
headers?: HttpHeaders,
observe?: 'body',
params?: HttpParams,
reportProgress?: boolean,
responseType: 'blob', withCredentials?: boolean,
}): Observable<Blob>;
/**
* Construct a request which interprets the body as text and returns it.
*
* @return an `Observable` of the body as a `string`.
*/
request(method: string, url: string, options: {
body?: any,
headers?: HttpHeaders,
observe?: 'body',
params?: HttpParams,
reportProgress?: boolean,
responseType: 'text', withCredentials?: boolean,
}): Observable<string>;
/**
* Construct a request which interprets the body as an `ArrayBuffer` and returns the full event stream.
*
* @return an `Observable` of all `HttpEvent`s for the request, with a body type of `ArrayBuffer`.
*/
request(method: string, url: string, options: {
body?: any,
headers?: HttpHeaders,
params?: HttpParams,
observe: 'events', reportProgress?: boolean,
responseType: 'arraybuffer', withCredentials?: boolean,
}): Observable<HttpEvent<ArrayBuffer>>;
/**
* Construct a request which interprets the body as an `Blob` and returns the full event stream.
*
* @return an `Observable` of all `HttpEvent`s for the request, with a body type of `Blob`.
*/
request(method: string, url: string, options: {
body?: any,
headers?: HttpHeaders,
observe: 'events', params?: HttpParams, reportProgress?: boolean,
responseType: 'blob', withCredentials?: boolean,
}): Observable<HttpEvent<Blob>>;
/**
* Construct a request which interprets the body as text and returns the full event stream.
*
* @return an `Observable` of all `HttpEvent`s for the request, with a body type of `string`.
*/
request(method: string, url: string, options: {
body?: any,
headers?: HttpHeaders,
observe: 'events', params?: HttpParams, reportProgress?: boolean,
responseType: 'text', withCredentials?: boolean,
}): Observable<HttpEvent<string>>;
/**
* Construct a request which interprets the body as JSON and returns the full event stream.
*
* @return an `Observable` of all `HttpEvent`s for the request, with a body type of `Object`.
*/
request(method: string, url: string, options: {
body?: any,
headers?: HttpHeaders,
reportProgress?: boolean,
observe: 'events', params?: HttpParams, responseType?: 'json', withCredentials?: boolean,
}): Observable<HttpEvent<any>>;
/**
* Construct a request which interprets the body as JSON and returns the full event stream.
*
* @return an `Observable` of all `HttpEvent`s for the request, with a body type of `R`.
*/
request<R>(method: string, url: string, options: {
body?: any,
headers?: HttpHeaders,
reportProgress?: boolean,
observe: 'events', params?: HttpParams, responseType?: 'json', withCredentials?: boolean,
}): Observable<HttpEvent<R>>;
/**
* Construct a request which interprets the body as an `ArrayBuffer` and returns the full response.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `ArrayBuffer`.
*/
request(method: string, url: string, options: {
body?: any,
headers?: HttpHeaders,
observe: 'response', params?: HttpParams, reportProgress?: boolean,
responseType: 'arraybuffer', withCredentials?: boolean,
}): Observable<HttpResponse<ArrayBuffer>>;
/**
* Construct a request which interprets the body as a `Blob` and returns the full response.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `Blob`.
*/
request(method: string, url: string, options: {
body?: any,
headers?: HttpHeaders,
observe: 'response', params?: HttpParams, reportProgress?: boolean,
responseType: 'blob', withCredentials?: boolean,
}): Observable<HttpResponse<Blob>>;
/**
* Construct a request which interprets the body as text and returns the full response.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `string`.
*/
request(method: string, url: string, options: {
body?: any,
headers?: HttpHeaders,
observe: 'response', params?: HttpParams, reportProgress?: boolean,
responseType: 'text', withCredentials?: boolean,
}): Observable<HttpResponse<string>>;
/**
* Construct a request which interprets the body as JSON and returns the full response.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `Object`.
*/
request(method: string, url: string, options: {
body?: any,
headers?: HttpHeaders,
reportProgress?: boolean,
observe: 'response', params?: HttpParams, responseType?: 'json', withCredentials?: boolean,
}): Observable<HttpResponse<Object>>;
/**
* Construct a request which interprets the body as JSON and returns the full response.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `R`.
*/
request<R>(method: string, url: string, options: {
body?: any,
headers?: HttpHeaders,
reportProgress?: boolean,
observe: 'response', params?: HttpParams, responseType?: 'json', withCredentials?: boolean,
}): Observable<HttpResponse<R>>;
/**
* Construct a request which interprets the body as JSON and returns it.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `Object`.
*/
request(method: string, url: string, options?: {
body?: any,
headers?: HttpHeaders,
observe?: 'body',
params?: HttpParams,
responseType?: 'json',
reportProgress?: boolean,
withCredentials?: boolean,
}): Observable<Object>;
/**
* Construct a request which interprets the body as JSON and returns it.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `R`.
*/
request<R>(method: string, url: string, options?: {
body?: any,
headers?: HttpHeaders,
observe?: 'body',
params?: HttpParams,
responseType?: 'json',
reportProgress?: boolean,
withCredentials?: boolean,
}): Observable<R>;
/**
* Construct a request in a manner where response type and requested `Observable` are not known
* statically.
*
* @return an `Observable` of whatever was requested, typed to `any`.
*/
request(method: string, url: string, options?: {
body?: any,
headers?: HttpHeaders,
params?: HttpParams,
observe?: HttpObserve,
reportProgress?: boolean,
responseType?: 'arraybuffer'|'blob'|'json'|'text',
withCredentials?: boolean,
}): Observable<any>;
/**
* Constructs an `Observable` for a particular HTTP request that, when subscribed,
* fires the request through the chain of registered interceptors and on to the
* server.
*
* This method can be called in one of two ways. Either an `HttpRequest`
* instance can be passed directly as the only parameter, or a method can be
* passed as the first parameter, a string URL as the second, and an
* options hash as the third.
*
* If a `HttpRequest` object is passed directly, an `Observable` of the
* raw `HttpEvent` stream will be returned.
*
* If a request is instead built by providing a URL, the options object
* determines the return type of `request()`. In addition to configuring
* request parameters such as the outgoing headers and/or the body, the options
* hash specifies two key pieces of information about the request: the
* `responseType` and what to `observe`.
*
* The `responseType` value determines how a successful response body will be
* parsed. If `responseType` is the default `json`, a type interface for the
* resulting object may be passed as a type parameter to `request()`.
*
* The `observe` value determines the return type of `request()`, based on what
* the consumer is interested in observing. A value of `events` will return an
* `Observable<HttpEvent>` representing the raw `HttpEvent` stream,
* including progress events by default. A value of `response` will return an
* `Observable<HttpResponse<T>>` where the `T` parameter of `HttpResponse`
* depends on the `responseType` and any optionally provided type parameter.
* A value of `body` will return an `Observable<T>` with the same `T` body type.
*/
request(first: string|HttpRequest<any>, url?: string, options: {
body?: any,
headers?: HttpHeaders,
observe?: HttpObserve,
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'arraybuffer'|'blob'|'json'|'text',
withCredentials?: boolean,
} = {}): Observable<any> {
let req: HttpRequest<any>;
// Firstly, check whether the primary argument is an instance of `HttpRequest`.
if (first instanceof HttpRequest) {
// It is. The other arguments must be undefined (per the signatures) and can be
// ignored.
req = first as HttpRequest<any>;
} else {
// It's a string, so it represents a URL. Construct a request based on it,
// and incorporate the remaining arguments (assuming GET unless a method is
// provided.
req = new HttpRequest(first, url !, options.body || null, {
headers: options.headers,
params: options.params,
reportProgress: options.reportProgress,
// By default, JSON is assumed to be returned for all calls.
responseType: options.responseType || 'json',
withCredentials: options.withCredentials,
});
}
// Start with an Observable.of() the initial request, and run the handler (which
// includes all interceptors) inside a concatMap(). This way, the handler runs
// inside an Observable chain, which causes interceptors to be re-run on every
// subscription (this also makes retries re-run the handler, including interceptors).
const events$: Observable<HttpEvent<any>> =
concatMap.call(of (req), (req: HttpRequest<any>) => this.handler.handle(req));
// If coming via the API signature which accepts a previously constructed HttpRequest,
// the only option is to get the event stream. Otherwise, return the event stream if
// that is what was requested.
if (first instanceof HttpRequest || options.observe === 'events') {
return events$;
}
// The requested stream contains either the full response or the body. In either
// case, the first step is to filter the event stream to extract a stream of
// responses(s).
const res$: Observable<HttpResponse<any>> =
filter.call(events$, (event: HttpEvent<any>) => event instanceof HttpResponse);
// Decide which stream to return.
switch (options.observe || 'body') {
case 'body':
// The requested stream is the body. Map the response stream to the response
// body. This could be done more simply, but a misbehaving interceptor might
// transform the response body into a different format and ignore the requested
// responseType. Guard against this by validating that the response is of the
// requested type.
switch (req.responseType) {
case 'arraybuffer':
return map.call(res$, (res: HttpResponse<any>) => {
// Validate that the body is an ArrayBuffer.
if (res.body !== null && !(res.body instanceof ArrayBuffer)) {
throw new Error('Response is not an ArrayBuffer.');
}
return res.body;
});
case 'blob':
return map.call(res$, (res: HttpResponse<any>) => {
// Validate that the body is a Blob.
if (res.body !== null && !(res.body instanceof Blob)) {
throw new Error('Response is not a Blob.');
}
return res.body;
});
case 'text':
return map.call(res$, (res: HttpResponse<any>) => {
// Validate that the body is a string.
if (res.body !== null && typeof res.body !== 'string') {
throw new Error('Response is not a string.');
}
return res.body;
});
case 'json':
default:
// No validation needed for JSON responses, as they can be of any type.
return map.call(res$, (res: HttpResponse<any>) => res.body);
}
case 'response':
// The response stream was requested directly, so return it.
return res$;
default:
// Guard against new future observe types being added.
throw new Error(`Unreachable: unhandled observe type ${options.observe}}`);
}
}
/**
* Construct a DELETE request which interprets the body as an `ArrayBuffer` and returns it.
*
* @return an `Observable` of the body as an `ArrayBuffer`.
*/
delete (url: string, options: {
headers?: HttpHeaders,
observe?: 'body',
params?: HttpParams,
reportProgress?: boolean,
responseType: 'arraybuffer', withCredentials?: boolean,
}): Observable<ArrayBuffer>;
/**
* Construct a DELETE request which interprets the body as a `Blob` and returns it.
*
* @return an `Observable` of the body as a `Blob`.
*/
delete (url: string, options: {
headers?: HttpHeaders,
observe?: 'body',
params?: HttpParams,
reportProgress?: boolean,
responseType: 'blob', withCredentials?: boolean,
}): Observable<Blob>;
/**
* Construct a DELETE request which interprets the body as text and returns it.
*
* @return an `Observable` of the body as a `string`.
*/
delete (url: string, options: {
headers?: HttpHeaders,
observe?: 'body',
params?: HttpParams,
reportProgress?: boolean,
responseType: 'text', withCredentials?: boolean,
}): Observable<string>;
/**
* Construct a DELETE request which interprets the body as an `ArrayBuffer` and returns the full event stream.
*
* @return an `Observable` of all `HttpEvent`s for the request, with a body type of `ArrayBuffer`.
*/
delete (url: string, options: {
headers?: HttpHeaders,
observe: 'events', params?: HttpParams, reportProgress?: boolean,
responseType: 'arraybuffer', withCredentials?: boolean,
}): Observable<HttpEvent<ArrayBuffer>>;
/**
* Construct a DELETE request which interprets the body as a `Blob` and returns the full event stream.
*
* @return an `Observable` of all `HttpEvent`s for the request, with a body type of `Blob`.
*/
delete (url: string, options: {
headers?: HttpHeaders,
observe: 'events', params?: HttpParams, reportProgress?: boolean,
responseType: 'blob', withCredentials?: boolean,
}): Observable<HttpEvent<Blob>>;
/**
* Construct a DELETE request which interprets the body as text and returns the full event stream.
*
* @return an `Observable` of all `HttpEvent`s for the request, with a body type of `string`.
*/
delete (url: string, options: {
headers?: HttpHeaders,
observe: 'events', params?: HttpParams, reportProgress?: boolean,
responseType: 'text', withCredentials?: boolean,
}): Observable<HttpEvent<string>>;
/**
* Construct a DELETE request which interprets the body as JSON and returns the full event stream.
*
* @return an `Observable` of all `HttpEvent`s for the request, with a body type of `Object`.
*/
delete (url: string, options: {
headers?: HttpHeaders,
observe: 'events',
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'json',
withCredentials?: boolean,
}): Observable<HttpEvent<Object>>;
/**
* Construct a DELETE request which interprets the body as JSON and returns the full event stream.
*
* @return an `Observable` of all `HttpEvent`s for the request, with a body type of `T`.
*/
delete<T>(url: string, options: {
headers?: HttpHeaders,
observe: 'events',
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'json',
withCredentials?: boolean,
}): Observable<HttpEvent<T>>;
/**
* Construct a DELETE request which interprets the body as an `ArrayBuffer` and returns the full response.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `ArrayBuffer`.
*/
delete (url: string, options: {
headers?: HttpHeaders,
observe: 'response', params?: HttpParams, reportProgress?: boolean,
responseType: 'arraybuffer', withCredentials?: boolean,
}): Observable<HttpResponse<ArrayBuffer>>;
/**
* Construct a DELETE request which interprets the body as a `Blob` and returns the full response.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `Blob`.
*/
delete (url: string, options: {
headers?: HttpHeaders,
observe: 'response', params?: HttpParams, reportProgress?: boolean,
responseType: 'blob', withCredentials?: boolean,
}): Observable<HttpResponse<Blob>>;
/**
* Construct a DELETE request which interprets the body as text and returns the full response.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `string`.
*/
delete (url: string, options: {
headers?: HttpHeaders,
observe: 'response', params?: HttpParams, reportProgress?: boolean,
responseType: 'text', withCredentials?: boolean,
}): Observable<HttpResponse<string>>;
/**
* Construct a DELETE request which interprets the body as JSON and returns the full response.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `Object`.
*/
delete (url: string, options: {
headers?: HttpHeaders,
observe: 'response',
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'json',
withCredentials?: boolean,
}): Observable<HttpResponse<Object>>;
/**
* Construct a DELETE request which interprets the body as JSON and returns the full response.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `T`.
*/
delete<T>(url: string, options: {
headers?: HttpHeaders,
observe: 'response',
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'json',
withCredentials?: boolean,
}): Observable<HttpResponse<T>>;
/**
* Construct a DELETE request which interprets the body as JSON and returns it.
*
* @return an `Observable` of the body as an `Object`.
*/
delete (url: string, options?: {
headers?: HttpHeaders,
observe?: 'body',
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'json',
withCredentials?: boolean,
}): Observable<Object>;
/**
* Construct a DELETE request which interprets the body as JSON and returns it.
*
* @return an `Observable` of the body as type `T`.
*/
delete<T>(url: string, options?: {
headers?: HttpHeaders,
observe?: 'body',
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'json',
withCredentials?: boolean,
}): Observable<T>;
/**
* Constructs an `Observable` which, when subscribed, will cause the configured
* DELETE request to be executed on the server. See the individual overloads for
* details of `delete()`'s return type based on the provided options.
*/
delete (url: string, options: {
headers?: HttpHeaders,
observe?: HttpObserve,
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'arraybuffer'|'blob'|'json'|'text',
withCredentials?: boolean,
} = {}): Observable<any> {
return this.request<any>('DELETE', url, options as any);
}
/**
* Construct a GET request which interprets the body as an `ArrayBuffer` and returns it.
*
* @return an `Observable` of the body as an `ArrayBuffer`.
*/
get(url: string, options: {
headers?: HttpHeaders,
observe?: 'body',
params?: HttpParams,
reportProgress?: boolean,
responseType: 'arraybuffer', withCredentials?: boolean,
}): Observable<ArrayBuffer>;
/**
* Construct a GET request which interprets the body as a `Blob` and returns it.
*
* @return an `Observable` of the body as a `Blob`.
*/
get(url: string, options: {
headers?: HttpHeaders,
observe?: 'body',
params?: HttpParams,
reportProgress?: boolean,
responseType: 'blob', withCredentials?: boolean,
}): Observable<Blob>;
/**
* Construct a GET request which interprets the body as text and returns it.
*
* @return an `Observable` of the body as a `string`.
*/
get(url: string, options: {
headers?: HttpHeaders,
observe?: 'body',
params?: HttpParams,
reportProgress?: boolean,
responseType: 'text', withCredentials?: boolean,
}): Observable<string>;
/**
* Construct a GET request which interprets the body as an `ArrayBuffer` and returns the full event stream.
*
* @return an `Observable` of all `HttpEvent`s for the request, with a body type of `ArrayBuffer`.
*/
get(url: string, options: {
headers?: HttpHeaders,
observe: 'events', params?: HttpParams, reportProgress?: boolean,
responseType: 'arraybuffer', withCredentials?: boolean,
}): Observable<HttpEvent<ArrayBuffer>>;
/**
* Construct a GET request which interprets the body as a `Blob` and returns the full event stream.
*
* @return an `Observable` of all `HttpEvent`s for the request, with a body type of `Blob`.
*/
get(url: string, options: {
headers?: HttpHeaders,
observe: 'events', params?: HttpParams, reportProgress?: boolean,
responseType: 'blob', withCredentials?: boolean,
}): Observable<HttpEvent<Blob>>;
/**
* Construct a GET request which interprets the body as text and returns the full event stream.
*
* @return an `Observable` of all `HttpEvent`s for the request, with a body type of `string`.
*/
get(url: string, options: {
headers?: HttpHeaders,
observe: 'events', params?: HttpParams, reportProgress?: boolean,
responseType: 'text', withCredentials?: boolean,
}): Observable<HttpEvent<string>>;
/**
* Construct a GET request which interprets the body as JSON and returns the full event stream.
*
* @return an `Observable` of all `HttpEvent`s for the request, with a body type of `Object`.
*/
get(url: string, options: {
headers?: HttpHeaders,
observe: 'events',
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'json',
withCredentials?: boolean,
}): Observable<HttpEvent<Object>>;
/**
* Construct a GET request which interprets the body as JSON and returns the full event stream.
*
* @return an `Observable` of all `HttpEvent`s for the request, with a body type of `T`.
*/
get<T>(url: string, options: {
headers?: HttpHeaders,
observe: 'events',
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'json',
withCredentials?: boolean,
}): Observable<HttpEvent<T>>;
/**
* Construct a GET request which interprets the body as an `ArrayBuffer` and returns the full response.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `ArrayBuffer`.
*/
get(url: string, options: {
headers?: HttpHeaders,
observe: 'response', params?: HttpParams, reportProgress?: boolean,
responseType: 'arraybuffer', withCredentials?: boolean,
}): Observable<HttpResponse<ArrayBuffer>>;
/**
* Construct a GET request which interprets the body as a `Blob` and returns the full response.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `Blob`.
*/
get(url: string, options: {
headers?: HttpHeaders,
observe: 'response', params?: HttpParams, reportProgress?: boolean,
responseType: 'blob', withCredentials?: boolean,
}): Observable<HttpResponse<Blob>>;
/**
* Construct a GET request which interprets the body as text and returns the full response.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `string`.
*/
get(url: string, options: {
headers?: HttpHeaders,
observe: 'response', params?: HttpParams, reportProgress?: boolean,
responseType: 'text', withCredentials?: boolean,
}): Observable<HttpResponse<string>>;
/**
* Construct a GET request which interprets the body as JSON and returns the full response.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `Object`.
*/
get(url: string, options: {
headers?: HttpHeaders,
observe: 'response',
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'json',
withCredentials?: boolean,
}): Observable<HttpResponse<Object>>;
/**
* Construct a GET request which interprets the body as JSON and returns the full response.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `T`.
*/
get<T>(url: string, options: {
headers?: HttpHeaders,
observe: 'response',
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'json',
withCredentials?: boolean,
}): Observable<HttpResponse<T>>;
/**
* Construct a GET request which interprets the body as JSON and returns it.
*
* @return an `Observable` of the body as an `Object`.
*/
get(url: string, options?: {
headers?: HttpHeaders,
observe?: 'body',
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'json',
withCredentials?: boolean,
}): Observable<Object>;
/**
* Construct a GET request which interprets the body as JSON and returns it.
*
* @return an `Observable` of the body as type `T`.
*/
get<T>(url: string, options?: {
headers?: HttpHeaders,
observe?: 'body',
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'json',
withCredentials?: boolean,
}): Observable<T>;
/**
* Constructs an `Observable` which, when subscribed, will cause the configured
* GET request to be executed on the server. See the individual overloads for
* details of `get()`'s return type based on the provided options.
*/
get(url: string, options: {
headers?: HttpHeaders,
observe?: HttpObserve,
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'arraybuffer'|'blob'|'json'|'text',
withCredentials?: boolean,
} = {}): Observable<any> {
return this.request<any>('GET', url, options as any);
}
/**
* Construct a HEAD request which interprets the body as an `ArrayBuffer` and returns it.
*
* @return an `Observable` of the body as an `ArrayBuffer`.
*/
head(url: string, options: {
headers?: HttpHeaders,
observe?: 'body',
params?: HttpParams,
reportProgress?: boolean,
responseType: 'arraybuffer', withCredentials?: boolean,
/**
* Construct a HEAD request which interprets the body as a `Blob` and returns it.
*
* @return an `Observable` of the body as a `Blob`.
*/
}): Observable<ArrayBuffer>;
head(url: string, options: {
headers?: HttpHeaders,
observe?: 'body',
params?: HttpParams,
reportProgress?: boolean,
responseType: 'blob', withCredentials?: boolean,
}): Observable<Blob>;
/**
* Construct a HEAD request which interprets the body as text and returns it.
*
* @return an `Observable` of the body as a `string`.
*/
head(url: string, options: {
headers?: HttpHeaders,
observe?: 'body',
params?: HttpParams,
reportProgress?: boolean,
responseType: 'text', withCredentials?: boolean,
}): Observable<string>;
/**
* Construct a GET request which interprets the body as an `ArrayBuffer` and returns the full event stream.
*
* @return an `Observable` of all `HttpEvent`s for the request, with a body type of `ArrayBuffer`.
*/
head(url: string, options: {
headers?: HttpHeaders,
observe: 'events', params?: HttpParams, reportProgress?: boolean,
responseType: 'arraybuffer', withCredentials?: boolean,
}): Observable<HttpEvent<ArrayBuffer>>;
/**
* Construct a HEAD request which interprets the body as a `Blob` and returns the full event stream.
*
* @return an `Observable` of all `HttpEvent`s for the request, with a body type of `Blob`.
*/
head(url: string, options: {
headers?: HttpHeaders,
observe: 'events', params?: HttpParams, reportProgress?: boolean,
responseType: 'blob', withCredentials?: boolean,
}): Observable<HttpEvent<Blob>>;
/**
* Construct a HEAD request which interprets the body as text and returns the full event stream.
*
* @return an `Observable` of all `HttpEvent`s for the request, with a body type of `string`.
*/
head(url: string, options: {
headers?: HttpHeaders,
observe: 'events', params?: HttpParams, reportProgress?: boolean,
responseType: 'text', withCredentials?: boolean,
}): Observable<HttpEvent<string>>;
/**
* Construct a HEAD request which interprets the body as JSON and returns the full event stream.
*
* @return an `Observable` of all `HttpEvent`s for the request, with a body type of `Object`.
*/
head(url: string, options: {
headers?: HttpHeaders,
observe: 'events',
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'json',
withCredentials?: boolean,
}): Observable<HttpEvent<Object>>;
/**
* Construct a HEAD request which interprets the body as JSON and returns the full event stream.
*
* @return an `Observable` of all `HttpEvent`s for the request, with a body type of `T`.
*/
head<T>(url: string, options: {
headers?: HttpHeaders,
observe: 'events',
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'json',
withCredentials?: boolean,
}): Observable<HttpEvent<T>>;
/**
* Construct a HEAD request which interprets the body as an `ArrayBuffer` and returns the full response.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `ArrayBuffer`.
*/
head(url: string, options: {
headers?: HttpHeaders,
observe: 'response', params?: HttpParams, reportProgress?: boolean,
responseType: 'arraybuffer', withCredentials?: boolean,
}): Observable<HttpResponse<ArrayBuffer>>;
/**
* Construct a HEAD request which interprets the body as a `Blob` and returns the full response.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `Blob`.
*/
head(url: string, options: {
headers?: HttpHeaders,
observe: 'response', params?: HttpParams, reportProgress?: boolean,
responseType: 'blob', withCredentials?: boolean,
}): Observable<HttpResponse<Blob>>;
/**
* Construct a HEAD request which interprets the body as text and returns the full response.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `string`.
*/
head(url: string, options: {
headers?: HttpHeaders,
observe: 'response', params?: HttpParams, reportProgress?: boolean,
responseType: 'text', withCredentials?: boolean,
}): Observable<HttpResponse<string>>;
/**
* Construct a HEAD request which interprets the body as JSON and returns the full response.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `Object`.
*/
head(url: string, options: {
headers?: HttpHeaders,
observe: 'response',
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'json',
withCredentials?: boolean,
}): Observable<HttpResponse<Object>>;
/**
* Construct a HEAD request which interprets the body as JSON and returns the full response.
*
* @return an `Observable` of the `HttpResponse` for the request, with a body type of `T`.
*/
head<T>(url: string, options: {
headers?: HttpHeaders,
observe: 'response',
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'json',
withCredentials?: boolean,
}): Observable<HttpResponse<T>>;
/**
* Construct a HEAD request which interprets the body as JSON and returns it.
*
* @return an `Observable` of the body as an `Object`.
*/
head(url: string, options?: {
headers?: HttpHeaders,
observe?: 'body',
params?: HttpParams,
reportProgress?: boolean,
responseType?: 'json',
withCredentials?: boolean,
}): Observable<Object>;
/**
* Construct a HEAD request which interprets the body as JSON and returns it.
*
* @return an `Observable` of the body as type `T`.
*/
head<T>(url: string, options?: {