angular - 使用 Angular HttpClient 解析服务器的 Http 请求

Question

我试图使用解析服务器的 REST API，因此在其文档中，他们写道: 要在 Parse 上创建新对象，请将 POST 请求发送到包含该对象内容的类 URL。例如，创建上述对象:

curl -X POST \
-H "X-Parse-Application-Id: ${APPLICATION_ID}" \
-H "X-Parse-REST-API-Key: ${REST_API_KEY}" \
-H "Content-Type: application/json" \
-d '{"score":1337,"playerName":"Sean Plott","cheatMode":false}' \
https://YOUR.PARSE-SERVER.HERE/parse/classes/GameScore

我测试了它，它工作正常，所以我想通过 Angular HttpClient 使用这个方法，然后我写了这段代码:

let url = 'https://parseapi.back4app.com/classes/test';
const httpOptions = {
headers: new HttpHeaders({

  'X-Parse-Application-Id': '6mK3kDvzuLeyJojS9yRGYr6JxmuDtapGhwmUflqy',
  'X-Parse-REST-API-Key': '########################################',
  'Content-Type':  'application/json'
 })
 };
    let params = new HttpParams();
    params = params.set('score', '1337');
    params = params.append('playername', 'mohy');
    this.httpClient.post(url,params,httpOptions).subscribe(data =>{
      console.log(data);

    },err => {
      alert(err.message);
    });

}

当我使用curl时，它工作正常，但如果我使用HttpClient，我会收到此错误:https://parseapi.back4app.com/classes/test的Http失败响应: 400 错误请求

我该如何解决这个问题？

Answer 1

HttpParams object serialize to an encoded string URL-query-string (?score=1337&playername=mohy) format,and this not valid json format as mention by content-type.

let url = 'https://parseapi.back4app.com/classes/test';
const httpOptions = {
 headers: new HttpHeaders({
   'X-Parse-Application-Id': '6mK3kDvzuLeyJojS9yRGYr6JxmuDtapGhwmUflqy',
   'X-Parse-REST-API-Key': '########################################',
   'Content-Type':  'application/json'
  })
 };

let body = {
  score: '1337',
  playername: 'mohy'
 }

this.httpClient.post(url,JSON.stringify(body),httpOptions).subscribe(data =>{
   console.log(data);
 },err => {
      alert(err.message);
 });
}

如果您想使用get方法并将参数作为URL-query-string传递

 let params = new HttpParams();
    params = params.set('score', '1337');
    params = params.append('playername', 'mohy');

    this.httpClient.get(url,{params},httpOptions).subscribe(data =>{
      console.log(data);
    },err => {
      alert(err.message);
    });