Angular 2我如何从Post请求中获取响应数据

Question

Post-Request从API获取响应与新的令牌，我如何从响应数据获取令牌参数。

这并不工作...

.MAP {响应：响应=> {让标记= response.json（）令牌}

从与请求后的响应。令牌从REST-API

{ 
    { "token":"eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzUxMiJ9.eyJpYXQiOjE0OTc1NDAzNDgsImp0aSI6IjVVNHJLazlONThmOHVaUVZPNkNVNHBYRUR3ZGdQbFE0TWNYU3l6YnFPMzA9IiwiaXNzIjoiaHR0cDpcL1wvbG9jYWxob3N0Ojg4ODhcL2RiYW5kand0XC8iLCJuYmYiOjE0OTc1NDAzNTgsImV4cCI6MTQ5NzU0NzU1OCwiZGF0YSI6eyJ1c2VySWQiOiIzIiwidXNlck5hbWUiOiJtYXJjby5saW5rZSIsImlzQWRtaW4iOmZhbHNlfX0.NOyLSB7N4TtVv9w7dw7mPrL5MUcAVjExycCSG-iJlqHiT3mugh20kq1T2N9RrBXsHO9XsvfEfrJ7k04QOw8hYw" 
} 

}

login(username: string, password: string): Observable<boolean> { 
    return this.http 
    .post('http://localhost:8888/dbandjwt/', 
      JSON.stringify({ username: username, password: password })) 
    .map((response: Response) => { 
      let data = response.json().token; //how i get the token from response data? 
      let token = data.token; 
      if (token) { 
       this.token = token; 
       localStorage.setItem('currentUser', JSON.stringify({ username: username, token: token })); 
     }) 
    }  

Answer 1

的问题是，你的JSON解析生成错误，请先用

.map { response: Response => { let token = response.text()} 

然后提取响应的只有这部分（你有{{"token":"etc.."}}应该{"token":"etc.."}

{ "token":"eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzUxMiJ9.eyJpYXQiOjE0OTc1NDAzNDgsImp0aSI6IjVVNHJLazlONThmOHVaUVZPNkNVNHBYRUR3ZGdQbFE0TWNYU3l6YnFPMzA9IiwiaXNzIjoiaHR0cDpcL1wvbG9jYWxob3N0Ojg4ODhcL2RiYW5kand0XC8iLCJuYmYiOjE0OTc1NDAzNTgsImV4cCI6MTQ5NzU0NzU1OCwiZGF0YSI6eyJ1c2VySWQiOiIzIiwidXNlck5hbWUiOiJtYXJjby5saW5rZSIsImlzQWRtaW4iOmZhbHNlfX0.NOyLSB7N4TtVv9w7dw7mPrL5MUcAVjExycCSG-iJlqHiT3mugh20kq1T2N9RrBXsHO9XsvfEfrJ7k04QOw8hYw" 
} 

，然后你可以使用​​或任何方法将它转换为JSON你知道

Answer 2

假设您正在其中一个组件中订阅它。

在服务

.... 
.map((response: Response) => response.json()) 
.catch(...... 

在组件

.subscribe(
    data => { 
     localStorage.setItem('token', data.token); 
...... 

这应该解决您的问题..