res.json()在HttpClient Angular 2中不是函数 [英] res.json() is a not a function in HttpClient Angular 2

问题描述

我以前使用的是Angular Http模块，方法res.json()可以正常工作. 我最近尝试过HttpClient，但是res.json()似乎没有用.只有使用res的作品，一些人才能告诉我http客户端中发生了什么变化.

I was using Angular Http module before and the method res.json() used to work fine. I have recently tried HttpClient but then the res.json() dosen't seem to work . only using res works can some one tell me what changed has happened in the http client.

return this.client.get('https://swapi.co/api/people/1/')
              .map((res:Response) => {
                 return  res.json(); // using maps to filter data returned form the http call this json dosn't work with http client
              }).map(data => {
                return data; // using maps of maps to filter data returned form the map
        }).flatMap((jedi) => this.http.get(jedi['homeworld'])
          .map(res => {
           return res.json().name; // using flat maps to combine data returned from two observables into one
          }).catch((error:any) => Observable.throw(error.json().error || 'Server error')));

我切换到http客户端，因为新的拦截器可以欢迎指针了，谢谢

I switched to http client because of the new interceptor can pointers are welcomed thanks

推荐答案

是的，这是因为默认情况下，新的http客户端会隐式调用res.json()，而您无需自己手动进行操作.这是提交的引用:

Right, that's because new http client by default calls res.json() implicitly and you don't need to that manually yourself. Here is the quote from commit:

JSON是默认设置，不再需要显式解析

JSON is an assumed default and no longer needs to be explicitly parsed

有关更多详细信息，请参见 HTTP和HTTPClient在角度4中的区别?.

See Difference between HTTP and HTTPClient in angular 4? for more details.

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