Change response type for http.post

Question

I have a post method using Angular's HttpClient.

I'm trying to subscribe to the response so I can do a few things after but I'm getting this error:

Error: Uncaught (in promise): HttpErrorResponse: {"headers":{"normalizedNames":{},"lazyUpdate":null},"status":200,"statusText":"OK","url":"XXXXXXX","ok":false,"name":"HttpErrorResponse","message":"Http failure during parsing for XXXXXXXX","error":{"error":{},"text":"OK"}}

I've seen somewhere that this could be because it's not a valid JSON response, when I test it on Postman, I get a OK but not as JSON.

My question is, how do I work around this? Is there a way for me to convert this to JSON?

My method looks like:

submitInfo() {
   this.http.post(url, data).toPromise()
      .then(
          (response: Response) => {
              console.log(response);
          }
      ));
}

If the response isn't JSON, read https://angular.io/guide/http#requesting-non-json-data — jonrsharpe, Oct 01 '19 at 14:25

score 1 · Accepted Answer · edited Oct 01 '19 at 14:30

1

By default Angular tries to process HTTP responses as JSON and hence it tends to go into error handler even though the actual HTTP request succeeds. For non-JSON responses you can explicitly specify that you are expecting a text response in your HTTP request or to get the benefits of inbuilt Angular error handling for responses modify your response from server/middleware as a JSON.

For non-JSON response try modifying your HTTP request like below

this.http.post(url, parameters, { responseType: 'text' });

edited Oct 01 '19 at 14:30

jonrsharpe

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answered Oct 01 '19 at 14:29

RR1112

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@jonrsharpe thank you! So when you explicit say the `responseType: 'text'` this is not to do a transformation right? rather is to literally tell what do expect? – MrRobot Oct 01 '19 at 14:44
1

@iconio it tells it what to expect, which *also* disables the default `JSON.parse` transformation. – jonrsharpe Oct 01 '19 at 14:46
Thank you very much brother! I really really appreciate your help – MrRobot Oct 01 '19 at 14:50

Change response type for http.post

1 Answers1