如何将授权 Header 添加到 Angular http 请求？

Question

这是我的第一个post。

我刚刚开始学习 Go 和 Angular，我正在尝试将 angular 应用程序连接到 Go api。我已经写了两个并且无法确定问题的根源。我认为这是一个 CORS 问题，但如果我不在我的 Angular http 请求中包含 headers 代码行，它就可以正常工作。此时我只是想添加 header。授权码尚未实现。

这两个应用程序都是运行本地的，Go 应用程序在端口 5000 上，Angular 在 4200 上

Angular 无效的 http 请求：

this.http.get<ProjectedBalance>(requestUrl, {headers: new HttpHeaders().set('Authorization', 'my-auth-token')})
    .subscribe(data => {
     this.projBalance = data.projBalance;
   }

Angular 有效的 http 请求：

this.http.get<ProjectedBalance>(requestUrl)
    .subscribe(data => {
     this.projBalance = data.projBalance;
   }

我收到此错误：

Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:4200' is therefore not allowed access. The response had HTTP status code 403

我在 go 代码中使用 gorilla/mux 和 gorilla/handlers

router := mux.NewRouter()
router.HandleFunc("/home/{endDate}", GetProjBalance).Methods("GET", "OPTIONS")
headersOk := handlers.AllowedHeaders([]string{"X-Requested-With, Content-Type, Authorization"})
originsOk := handlers.AllowedOrigins([]string{"*"})
methodsOk := handlers.AllowedMethods([]string{"GET", "HEAD", "POST", "PUT", "OPTIONS"})
//start server on port
log.Fatal(http.ListenAndServe(":5000", handlers.CORS(originsOk, headersOk, methodsOk)(router)))

Headers 来自 Chrome 开发工具

Request URL:http://localhost:5000/home/2020-12-21
Request Method:OPTIONS
Status Code:403 Forbidden
Remote Address:[::1]:5000
Referrer Policy:no-referrer-when-downgrade

Response Headers
view source
Content-Length:0
Content-Type:text/plain; charset=utf-8
Date:Mon, 20 Nov 2017 21:39:43 GMT

Request Headers
view source
Accept:*/*
Accept-Encoding:gzip, deflate, br
Accept-Language:en-US,en;q=0.9,uz;q=0.8
Access-Control-Request-Headers:authorization
Access-Control-Request-Method:GET
Connection:keep-alive
Host:localhost:5000
Origin:http://localhost:4200

Answer 1

这是一个例子：

this.http
        .get(url, return new RequestOptions({
          headers: new Headers({
            Authorization: `Bearer ${authtoken}`
          }),
        }))
        .map(res => res.json());

Answer 2

关于在 Angular 中处理身份验证的最佳方式 headers > 4 最好使用
Http Interceptors 将它们添加到每个请求中，然后使用
Guards 用于保护您的路线。

这是我在我的应用程序中使用的 AuthInterceptor 的完整示例：

auth.interceptor.ts

import { HttpEvent, HttpHandler, HttpInterceptor, HttpRequest } from '@angular/common/http';
import { Injectable } from '@angular/core';

import { Observable } from 'rxjs/Observable';

import { AuthService } from './auth.service';

@Injectable()
export class AuthInterceptor implements HttpInterceptor {
  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    req = req.clone({
      setHeaders: {
        'Content-Type' : 'application/json; charset=utf-8',
        'Accept'       : 'application/json',
        'Authorization': `Bearer ${AuthService.getToken()}`,
      },
    });

    return next.handle(req);
  }
}

您需要在 app.module 中将您的拦截器注册为提供商：

app.module.ts

import { HTTP_INTERCEPTORS, HttpClientModule } from '@angular/common/http';
import { AuthInterceptor } from '../auth/auth.interceptor';

...

imports: [
    HttpClientModule,
    ...
],
providers: [
    {
      provide : HTTP_INTERCEPTORS,
      useClass: AuthInterceptor,
      multi   : true,
    },
    ...
],

...

您可以在 post 中进一步了解此方法。

关于 Go 方面，这很可能是
之间不匹配的情况 请求 Headers 您正在发送并且 headers CORS 允许。
您应该尝试的第一件事是允许所有这些：

headersOk := handlers.AllowedHeaders([]string{"*"})
originsOk := handlers.AllowedOrigins([]string{"*"})
methodsOk := handlers.AllowedMethods([]string{"GET", "HEAD", "POST", "PUT", "OPTIONS"})

如果问题消失，请尝试仔细构建您的 CORS 一个一个到您的客户发送的内容。

Answer 3

如果你不想添加拦截器，这对我有用：

var header = {
  headers: new HttpHeaders()
    .set('Authorization',  `Basic ${btoa(AuthService.getToken())}`)
}

this.http.get(url, header)

对于 Bearer，

set('Authorization',  `Bearer ${AuthService.getToken()}`)

Answer 4

Angular 6 ==> 带授权的 HTTP Get 请求示例 Header

public IsClientCreditCardExits(companyId: string, token: any) {
    let header = new Headers({ 'Authorization': `Bearer ${token}` });
    const options = new RequestOptions({
       headers: header,
    });
    return this._http.get(this.ApiURL + "api/Subscriptions/IsClientCreditCardExits/" + companyId + "/", options);    
}

Answer 5

以下示例适用于您只希望在访问需要授权的资源时添加一些 headers 的情况，请参阅下面的代码。请注意，您需要在 authentication.service.ts.

中创建 getToken 方法

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

import { environment } from '../../environments/environment';
import { AuthenticationService } from '../services/authentication.service';

@Injectable({
  providedIn: 'root'
})
export class AuthenticationInterceptorService implements HttpInterceptor {
  constructor(public authenticationService: AuthenticationService) {}
  intercept(
    request: HttpRequest<any>,
    next: HttpHandler
  ): Observable<HttpEvent<any>> {
    const accessToken: string = this.authenticationService.getToken();
    // set global application headers.
    request = request.clone({
      setHeaders: {
        'Content-Type': 'application/json; charset=utf-8',
        Accept: 'application/json',
        'X-AppName': environment.xAppName,
        'X-Locale': 'en'
      }
    });
    // Set headers for requests that require authorization.
    if (accessToken) {
      const authenticatedRequest = request.clone({
        headers: request.headers.set(
          'Authorization',
          `Token token=${accessToken}`
        )
      });
      // Request with authorization headers
      return next.handle(authenticatedRequest);
    } else {
      // Request without authorization header
      return next.handle(request);
    }
  }
}

在app.module.ts中注册拦截器，如下所示：

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import { AuthenticationInterceptorService } from './services/authentication-interceptor.service';

import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { HttpClientModule, HTTP_INTERCEPTORS } from '@angular/common/http';

@NgModule({
  declarations: [AppComponent],
  imports: [BrowserModule, AppRoutingModule, HttpClientModule],
  providers: [
    {
      provide: HTTP_INTERCEPTORS,
      useClass: AuthenticationInterceptorService,
      multi: true
    }
  ],
  bootstrap: [AppComponent]
})
export class AppModule {}

如何将授权 Header 添加到 Angular http 请求？

How to add Authorization Header to Angular http request?

go

gorilla

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