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Copy pathmodule.ts
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93 lines (86 loc) · 2.64 KB
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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 {Inject, NgModule, Optional} from '@angular/core';
import {HttpBackend, HttpHandler} from './backend';
import {HttpClient} from './client';
import {HTTP_INTERCEPTORS, HttpInterceptor, HttpInterceptorHandler} from './interceptor';
import {JsonpCallbackContext, JsonpClientBackend, JsonpInterceptor} from './jsonp';
import {BrowserXhr, HttpXhrBackend, XhrFactory} from './xhr';
/**
* Constructs an `HttpHandler` that applies a bunch of `HttpInterceptor`s
* to a request before passing it to the given `HttpBackend`.
*
* Meant to be used as a factory function within `HttpClientModule`.
*
* @experimental
*/
export function interceptingHandler(
backend: HttpBackend, interceptors: HttpInterceptor[] | null = []): HttpHandler {
if (!interceptors) {
return backend;
}
return interceptors.reduceRight(
(next, interceptor) => new HttpInterceptorHandler(next, interceptor), backend);
}
/**
* Factory function that determines where to store JSONP callbacks.
*
* Ordinarily JSONP callbacks are stored on the `window` object, but this may not exist
* in test environments. In that case, callbacks are stored on an anonymous object instead.
*
* @experimental
*/
export function jsonpCallbackContext(): Object {
if (typeof window === 'object') {
return window;
}
return {};
}
/**
* `NgModule` which provides the `HttpClient` and associated services.
*
* Interceptors can be added to the chain behind `HttpClient` by binding them
* to the multiprovider for `HTTP_INTERCEPTORS`.
*
* @experimental
*/
@NgModule({
providers: [
HttpClient,
// HttpHandler is the backend + interceptors and is constructed
// using the interceptingHandler factory function.
{
provide: HttpHandler,
useFactory: interceptingHandler,
deps: [HttpBackend, [new Optional(), new Inject(HTTP_INTERCEPTORS)]],
},
HttpXhrBackend,
{provide: HttpBackend, useExisting: HttpXhrBackend},
BrowserXhr,
{provide: XhrFactory, useExisting: BrowserXhr},
],
})
export class HttpClientModule {
}
/**
* `NgModule` which enables JSONP support in `HttpClient`.
*
* Without this module, Jsonp requests will reach the backend
* with method JSONP, where they'll be rejected.
*
* @experimental
*/
@NgModule({
providers: [
JsonpClientBackend,
{provide: JsonpCallbackContext, useFactory: jsonpCallbackContext},
{provide: HTTP_INTERCEPTORS, useClass: JsonpInterceptor, multi: true},
],
})
export class HttpClientJsonpModule {
}