How to get body from HttpErrorResponse in Angular 6?

Question

I have created a REST API call in my Angular app which downloads a file.

I am setting responseType to 'blob' since I am expecting a file in response.

But when there is no file available at the server the Response has a error code as 404 i.e Bad Request with some message in body.

But I am not able to parse that error message from body since HttpErrorResponse is giving a blob object in error.error

How do I get the actual body from the error object instead of blob.

Also is there any way to configure angular that on success of an api call parse the request in blob otherwise parse it in json ???

Hoping for a resolution

Answer 1

Try this

if(error.error instanceof Blob) {
    error.error.text().then(text => {
      let error_msg = (JSON.parse(text).message);
      console.log(error_msg)
    });
} else {
    //handle regular json error - useful if you are offline
}