我需要在用户登录后为每个后续请求设置一些授权头。
为特定请求设置头信息，
import {Headers} from 'angular2/http';
var headers = new Headers();
headers.append(headerName, value);
// HTTP POST using these headers
this.http.post(url, data, {
headers: headers
})
// do something with the response
参考
但是，以这种方式为每个请求手动设置请求头是不可行的。
我如何设置头设置一旦用户登录，也删除注销这些头?
当前回答
我设置头的最大问题(在2022年)是HttpHeaders上的append方法返回原始对象的克隆，而没有修改原始对象本身。所以标题。Append ('header'， 'value')不够。我必须重新分配结果或直接在HTTP调用中使用它:
let headers = new HttpHeaders();
headers = headers.append('header', 'value');
this.http.get<any>('https://someulr.com/api/users', { headers });
其他回答
最简单的
创建配置。ts文件
import { HttpHeaders } from '@angular/common/http';
export class Config {
url: string = 'http://localhost:3000';
httpOptions: any = {
headers: new HttpHeaders({
'Content-Type': 'application/json',
'Authorization': JSON.parse(localStorage.getItem('currentUser')).token
})
}
}
然后在你的服务上，导入配置。ts文件
import { Config } from '../config';
import { HttpClient } from '@angular/common/http';
@Injectable()
export class OrganizationService {
config = new Config;
constructor(
private http: HttpClient
) { }
addData(data): Observable<any> {
let sendAddLink = `${this.config.url}/api/addData`;
return this.http.post(sendAddLink , data, this.config.httpOptions).pipe(
tap(snap => {
return snap;
})
);
}
我认为这是最简单和最安全的。
虽然我很晚才回，但也许能帮到别人。当使用@NgModule时，要向所有请求注入头文件，可以这样做:
(我在Angular 2.0.1中进行了测试)
/**
* Extending BaseRequestOptions to inject common headers to all requests.
*/
class CustomRequestOptions extends BaseRequestOptions {
constructor() {
super();
this.headers.append('Authorization', 'my-token');
this.headers.append('foo', 'bar');
}
}
现在在@NgModule中执行以下操作:
@NgModule({
declarations: [FooComponent],
imports : [
// Angular modules
BrowserModule,
HttpModule, // This is required
/* other modules */
],
providers : [
{provide: LocationStrategy, useClass: HashLocationStrategy},
// This is the main part. We are telling Angular to provide an instance of
// CustomRequestOptions whenever someone injects RequestOptions
{provide: RequestOptions, useClass: CustomRequestOptions}
],
bootstrap : [AppComponent]
})
我设置头的最大问题(在2022年)是HttpHeaders上的append方法返回原始对象的克隆，而没有修改原始对象本身。所以标题。Append ('header'， 'value')不够。我必须重新分配结果或直接在HTTP调用中使用它:
let headers = new HttpHeaders();
headers = headers.append('header', 'value');
this.http.get<any>('https://someulr.com/api/users', { headers });
你可以用一些授权头创建你自己的http客户端:
import {Injectable} from '@angular/core';
import {HttpClient, HttpHeaders} from '@angular/common/http';
@Injectable({
providedIn: 'root'
})
export class HttpClientWithAuthorization {
constructor(private http: HttpClient) {}
createAuthorizationHeader(bearerToken: string): HttpHeaders {
const headerDict = {
Authorization: 'Bearer ' + bearerToken,
}
return new HttpHeaders(headerDict);
}
get<T>(url, bearerToken) {
this.createAuthorizationHeader(bearerToken);
return this.http.get<T>(url, {
headers: this.createAuthorizationHeader(bearerToken)
});
}
post<T>(url, bearerToken, data) {
this.createAuthorizationHeader(bearerToken);
return this.http.post<T>(url, data, {
headers: this.createAuthorizationHeader(bearerToken)
});
}
}
然后在你的服务类中注入它而不是HttpClient:
@Injectable({
providedIn: 'root'
})
export class SomeService {
constructor(readonly httpClientWithAuthorization: HttpClientWithAuthorization) {}
getSomething(): Observable<Object> {
return this.httpClientWithAuthorization.get<Object>(url,'someBearer');
}
postSomething(data) {
return this.httpClientWithAuthorization.post<Object>(url,'someBearer', data);
}
}
迟到总比不到好……=）
您可以采用扩展BaseRequestOptions的概念(从这里https://angular.io/docs/ts/latest/guide/server-communication.html#!#override-default-request-options)并“动态”刷新头(不仅仅是在构造函数中)。你可以像这样使用getter/setter重写“headers”属性:
import { Injectable } from '@angular/core';
import { BaseRequestOptions, RequestOptions, Headers } from '@angular/http';
@Injectable()
export class DefaultRequestOptions extends BaseRequestOptions {
private superHeaders: Headers;
get headers() {
// Set the default 'Content-Type' header
this.superHeaders.set('Content-Type', 'application/json');
const token = localStorage.getItem('authToken');
if(token) {
this.superHeaders.set('Authorization', `Bearer ${token}`);
} else {
this.superHeaders.delete('Authorization');
}
return this.superHeaders;
}
set headers(headers: Headers) {
this.superHeaders = headers;
}
constructor() {
super();
}
}
export const requestOptionsProvider = { provide: RequestOptions, useClass: DefaultRequestOptions };
