如果 Angular2 HTTP 响应数据不符合类型，我如何捕获错误

Question

如果我使用类型创建一个 Angular2 HTTP 请求，然后也分配一个具有特定类型的响应，如果服务器响应不是该类型，那么我可以捕获错误而不是破坏应用程序并执行 activity?

.....接口.....

export interface loginUser {
    username: string;
    password: string;
}

export interface loginResData {
    username: string;
    details: string;
}

...组件代码.....

user: loginUser
 constructor(private _httpprovider: Httpprovider, private _router: Router) {

   }

  login(user) {
    this._httpprovider.httpReq(this.url, 'POST', user, null).subscribe((data: loginResData) => {
      this.loginEvent.emit(data);
    });
  }

如何捕获发生在数据上而不是类型数据上的错误：loginResData。首先有可能吗？

Answer 1

接口在运行时被忽略。你最好创建一个 class like

   export class loginResData {
     username: string;
     details: string;
     constructor(data:any) {
       if(data && data.username && data.details) {
         this.username = data.username;
         this.details = data.details;
       }
       throw 'loginResData is invalid or incomplete';
     }
   }

  login(user) {
    this._httpprovider.httpReq(this.url, 'POST', user, null)
    .map(data:any => new oginResData(data))
    .subscribe((data: loginResData) => {
      this.loginEvent.emit(data);
    });
  }

如果 Angular2 HTTP 响应数据不符合类型，我如何捕获错误

How do I capture error if Angular2 HTTP response data does not adhere to type

interface

typescript

angular-http

typescript-typings

angular