具有授权的Angular 5 GET REST Api返回stuts 500内部错误(来自客户端)

问题描述 投票:0回答:2

我正在使用IBM Watson工具的音调分析器api。由邮递员测试它工作正常,但在Angular它返回错误为500状态。作为音调分析器api,它需要授权,我将凭证放入标题。

这是我的代码示例。

service.ts:

const TONE_API = "https://gateway.watsonplatform.net/tone-analyzer/api/v3/tone?version=2017-09-21&text=";

const httpOptions = {
  headers: new Headers({
    'Content-Type':  'application/json',
    'Access-Control-Allow-Origin':'*',
    'Access-Control-Allow-Headers': 'Origin, X-Requested-With, Content-Type, Accept, Authorization',
    'Access-Control-Allow-Methods': 'GET, POST, PUT, DELETE, OPTIONS',
    'Authorization': 'Basic ************************:************'
  })
};
const options: RequestOptionsArgs = new RequestOptions();
options.headers = httpOptions.headers;

@Injectable()
export class ToneAnalyserService {

  constructor(private http: Http) { }

  // API: GET /message
  getAnalyser(message:string) {
    let url = TONE_API + message;
    return this.http.get(url, options)
      .map(res => res.json())
      .catch(err=>{
        throw(err);
      });
  } 

component.ts:

 this.message = "I like this idea!"; 
   this.toneAnalyser.getAnalyser(this.message).subscribe(res =>{
     this.result = res;
       console.log(res.json());
      }, err => {
        console.log(err);
      });
angular rest tone-analyzer
2个回答
1
投票

由于CORS,您无法从浏览器应用程序直接调用watsonplatformwatsonplatform不支持该政策。

您必须创建自己的后端服务,该服务将代理您的请求。

要么:

对于本地开发,您可以创建proxy.config.js别名:

module.exports = {
  '/watsonplatform': {
    target: 'https://gateway.watsonplatform.net/',
    secure: false,
    changeOrigin: true
  },
};

并从get('/watsonplatform/tone-analyzer/api/v3/tone?version=2017-09-21&text=')等应用程序调用

当您托管应用程序时,使用nginx别名来执行相同的操作。


0
投票

我确实配置了代理并像你说的那样设置了Api。同时,我编辑了代码并尝试调用该路由,但它返回在控制台中找不到的url 404。

GET http://localhost:4200/watsonplatform/tone-analyzer/api/v3/tone?version=2017-09-21&text=I%27m%20happy 404 (Not Found)

样本如下:

baseUrl ="/watsonplatform/tone-analyzer/api/v3/tone?version=2017-09-21&text=";

  constructor(private accountService: AccountService, private toneAnalyser: ToneAnalyserService,
  private http:HttpClient) { }

  ngOnInit() {

    const options = {
      headers: new HttpHeaders({
        'Content-Type': 'application/x-www-form-urlencoded',
        'Authorization': 'Basic fc52487b-f8e5-4948-a11c-43901c0b6a0d:NsP8HyWsoLw8',
        'Access-Control-Allow-Origin':'*',
        'Access-Control-Allow-Headers':'Origin, X-Requested-With, Content-Type, Accept, Authorization',
        'Access-Control-Allow-Methods': 'GET, POST, PUT, DELETE, OPTIONS'       
      })
    };

    this.http.get(this.baseUrl+"I'm happy",options).subscribe(data=> {
      console.log(data);
    });
} 
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