授权令牌在 Angular 的响应中作为 null 发送

Question

我正在尝试使用我的企业应用程序和 Angular 中提供的 REST API。我想要实现的是从我的企业应用程序中获取一些数据。为此，我必须做两件事：

1- 通过 Angular 登录到我的企业应用程序。为此，企业应用程序已经提供了一个自定义身份验证 REST API。我也吃同样的。生成了一个身份验证令牌，我将其保存在 localStorage 中。

2- 在身份验证发生后向企业应用程序发送 GET 请求以获取数据。这是我面临问题的地方。我无法在 GET 请求中传递身份验证令牌。在 Chrome 开发工具的“应用程序”选项卡下检查相同内容时，我可以在“请求标头”部分看到授权值为空。以下是相同的屏幕截图：

以下是我开发的代码：

1 - 身份验证服务 (auth.service.ts)

     import { Injectable } from '@angular/core';
     import { HttpClient, HttpHeaders } from '@angular/common/http';
     import{Http} from '@angular/http'
     import { Observable } from 'rxjs';
     import { map } from 'rxjs/operators';
     import { URLSearchParams,Response } from '@angular/http'

     @Injectable()
     export class AuthenticationService {
     constructor(private http: Http) { }
     username:string = 'Admin';
     password:string='livelink';  
     token:any; 
     login() 
     {

    let urlSearchParams = new URLSearchParams();
    urlSearchParams.append('Username', this.username);
    urlSearchParams.append('Password', this.password);
     this.http.post('http://localhost/otcs/cs.exe/api/v1/auth',urlSearchParams)
        .subscribe((res:Response) => 
        {
            // login successful if there's a jwt token in the response
            if (res) {
                const data = res.json();
                ;
                this.token = data;
                console.log(data);
                // store username and jwt token in local storage to keep user logged in between page refreshes
                localStorage.setItem('currentUser', JSON.stringify({  ticket: data }));

            }
        });

        console.log("INSIDE LOGIN this.token  = "+this.token)//done for debugging, returning undefined
}

public getToken()
 {

    console.log("GET TOKEN VALUE "+ localStorage.getItem('ticket'))//done for debugging, returning undefined
    return localStorage.getItem('ticket');
     }

  }

2 - 令牌拦截器 (token.interceptor.ts)

     import { Injectable } from '@angular/core';
     import {
     HttpRequest,
     HttpHandler,
     HttpEvent,
     HttpInterceptor
     } from '@angular/common/http';
     import { AuthenticationService } from './auth.service';
     import { Observable } from 'rxjs';
     import { Http } from '@angular/http';

     @Injectable()
     export class TokenInterceptor implements HttpInterceptor {
     constructor(public auth: AuthenticationService) {}
     intercept(request: HttpRequest<any>, next: HttpHandler): 
     Observable<HttpEvent<any>> {

     request = request.clone({
     setHeaders: {
     Authorization: `Bearer ${this.auth.getToken()}`
     }
   });

        return next.handle(request);
     }
   }

3 - 应用组件 (app.component.ts)

 import { Component } from '@angular/core';
 import { AuthenticationService } from './auth.service';
 import{Http} from '@angular/http'
 import { HttpClient } from '@angular/common/http'
 @Component({
 selector: 'app-root',
 templateUrl: './app.component.html',
 styleUrls: ['./app.component.css']
 })
  export class AppComponent 
  {

 constructor(private authenticationService: AuthenticationService, private 
 http:HttpClient)
   {
      this.authenticationService.login();
      this.ping() ;

    }

     public ping() {
    this.http.get('http://localhost/otcs/cs.exe/api/v1/nodes/16236/output')
     .subscribe(
  data => console.log(data),
  err => console.log(err)
        );
      }
    }

4- 应用模块 (app.module.ts)

     import { BrowserModule } from '@angular/platform-browser';
     import { NgModule } from '@angular/core';
     import { HttpClientModule, HTTP_INTERCEPTORS } from 
     '@angular/common/http';
     import { AppComponent } from './app.component';
     import { AuthenticationService } from './auth.service';
     import { HttpModule } from '@angular/http';
     import { TokenInterceptor } from './token.interceptor';

     @NgModule({
     declarations:[AppComponent],
     imports: [
            BrowserModule,
            HttpClientModule,
            HttpModule
           ],

    providers: [AuthenticationService,
   {
      provide: HTTP_INTERCEPTORS,
      useClass: TokenInterceptor,
       multi: true
}],
        bootstrap: [AppComponent]
     })
        export class AppModule { }

在运行上述项目时，以下是控制台中显示的输出：

我无法理解为什么我的令牌没有通过 GET 请求传递。

Answer 1

您正在使用此行保存令牌

localStorage.setItem('currentUser', JSON.stringify({  ticket: data }));

但是，你的函数 getToken() 是从 localStorage 得到的。我认为你的功能应该是这样的：

public getToken() {
    const currentUser = JSON.parse(localStorage.getItem('currentUser') || '{}');
    console.log("GET TOKEN VALUE ", currentUser.ticket))//done for debugging
    return currentUser.ticket;
}

希望对你有帮助

Answer 2

在 getToken 中检索令牌时，将密钥用作“currrentUser”而不是“ticket”

public getToken() {
    const currentUser = JSON.parse(localStorage.getItem('currentUser'));
    if (currentUser) {
    return currentUser.ticket;
    } else return null;
}

最好将密钥存储在某些配置中，以便在任何地方都可以访问，因此当前密钥不会丢失。