HTTPClient POST尝试解析非JSON响应 [英] HTTPClient POST tries to parse a non-JSON response

问题描述

我正在尝试使用Angular发出请求，并且我知道HTTP响应将不是JSON ，而是文本.但是，由于以下错误，Angular似乎期望得到JSON响应:

I'm trying to make a request in Angular and I know that the HTTP response will not be in JSON but in text. However, Angular seems to be expecting a JSON response since the error is the following:

SyntaxError:意外令牌<在JSON.parse位置0的JSON中 ()在XMLHttpRequest.c

SyntaxError: Unexpected token < in JSON at position 0 at JSON.parse () at XMLHttpRequest.c

以及

解析 http://localhost:9 ...

这是发布方法:

return this.http.post(this.loginUrl, this.createLoginFormData(username, password), this.httpOptions)
  .pipe(
    tap( // Log the result or error
      data => console.log(data);
      error => console.log(error)
    )
  );

和标题.

private httpOptions = {

  headers: new HttpHeaders({
    'Accept': 'text/html, application/xhtml+xml, */*',
    'Content-Type': 'application/x-www-form-urlencoded',
    responseType: 'text'
  },

) };

我认为responseType: 'text'足以使Angular期待非JSON响应.

I thought that responseType: 'text' would be enough to make Angular expect a non JSON response.

推荐答案

您已将responseType: 'text'放在httpOptions的错误部分中-它应位于headers的外部中，像这样:

You've put responseType: 'text' in the wrong section of your httpOptions - It should sit outside of headers, like so:

private httpOptions = {
  headers: new HttpHeaders({
    'Accept': 'text/html, application/xhtml+xml, */*',
    'Content-Type': 'application/x-www-form-urlencoded'
  }),
  responseType: 'text'
};

使用以前的方法，将responseType的请求标头发送到服务器，而不是简单地向Angular发出指令以将响应实际视为文本.

With what you had before, a request header of responseType was being sent to the server, rather than simply having an instruction to Angular to actually treat the response as text.

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