Created
March 22, 2021 03:10
-
-
Save zzpmaster/c39d89ccfd9987d9471feccbb8cc3673 to your computer and use it in GitHub Desktop.
Angular Create multi-instance HttpClient
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import { Component, Inject, InjectionToken } from "@angular/core"; | |
import { HttpClient, HttpXhrBackend } from "@angular/common/http"; | |
import { Observable } from "rxjs/Observable"; | |
// import { CUSTOMER_HTTP_CLENT } from "./app.module"; | |
export const CUSTOMER_HTTP_CLENT = new InjectionToken("xx"); | |
@Component({ | |
selector: "my-app", | |
template: ` | |
<div> | |
<h3>Response</h3> | |
{{ response | async | json }} | |
</div> | |
<button (click)="request()">Make request</button> | |
` | |
}) | |
export class AppComponent { | |
response: Observable<any>; | |
constructor(@Inject(CUSTOMER_HTTP_CLENT) private httpClient: HttpClient) {} | |
request() { | |
const req = new HttpRequest( | |
"GET", | |
"https://jsonplaceholder.typicode.com/posts/1" | |
); | |
const i1Handler = new HttpInterceptorHandler(this.backend, new I1()); | |
const i2Handler = new HttpInterceptorHandler(i1Handler, new I2()); | |
this.response = i2Handler.handle(req); | |
this.httpClient | |
.get("https://jsonplaceholder.typicode.com/posts/1") | |
.subscribe(data => console.log(data)); | |
} | |
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import { NgModule } from "@angular/core"; | |
import { BrowserModule } from "@angular/platform-browser"; | |
import { AppComponent, CUSTOMER_HTTP_CLENT } from "./app.component"; | |
import { | |
HTTP_INTERCEPTORS, | |
HttpBackend, | |
HttpClientModule, | |
HttpClient | |
} from "@angular/common/http"; | |
import { I1, I2 } from "./interceptors"; | |
// 返回新的httpclient实例 | |
function createHttpClient(backend: HttpBackend): HttpClient { | |
return new HttpClient(backend); | |
} | |
@NgModule({ | |
imports: [BrowserModule, HttpClientModule], | |
declarations: [AppComponent], | |
providers: [ | |
{ | |
provide: HTTP_INTERCEPTORS, | |
useClass: I1, | |
multi: true | |
}, | |
{ | |
provide: HTTP_INTERCEPTORS, | |
useClass: I2, | |
multi: true | |
}, | |
{ | |
provide: CUSTOMER_HTTP_CLENT, | |
useFactory: createHttpClient, | |
deps: [HttpBackend] | |
} | |
], | |
bootstrap: [AppComponent] | |
}) | |
export class AppModule {} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import { Injectable } from '@angular/core'; | |
import { HttpEvent, HttpHandler, HttpInterceptor, HttpRequest } from '@angular/common/http'; | |
import { Observable } from 'rxjs/Observable'; | |
@Injectable() | |
export class I1 implements HttpInterceptor { | |
intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> { | |
const modified = req.clone({setHeaders: {'Custom-Header-1': '1'}}); | |
return next.handle(modified); | |
} | |
} | |
@Injectable() | |
export class I2 implements HttpInterceptor { | |
intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> { | |
const modified = req.clone({setHeaders: {'Custom-Header-2': '2'}}); | |
return next.handle(modified); | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment