After making a request with HttpClient, the response can either be an empty body or a body

Question

After making a request with HttpClient, the response can either be an empty body or a body

Encountering issues with HttpClient while trying to post data, I am faced with two distinct errors:

When booking is treated as an object, the error message reads:
```
Backend returned code 400, body was: [object Object]
```
.
Converting booking to JSON format by using JSON.stringify(booking) triggers the error:
```
Backend returned code 415, body was: null
```
.

What could be the reason for this?

public addBooking(booking): Observable<any[]> {
  return this.http.post<any[]>(`${this.url}bookings`, booking)
    .pipe(
      catchError(this.handleError)
    );
}

Object: Testing the following object structure in swagger yields successful results.

{
  "firstDate": "2020-05-29",
  "secondDate": "2020-05-29",
  "productId": 0,
  "userId": 0
}

javascript angular typescript http

Answer 1

Answer №1

Make sure to include the Content-Type and Accept headers in your request.

import {HttpHeaders} from '@angular/common/http';

public addBooking(booking): Observable<any[]> {
  const httpOptions = {
    headers: new HttpHeaders({
      'Content-Type': 'application/json',
      'Accept': 'application/json'
    })
  };

  return this.http.post<any[]>(`${this.url}bookings`, booking, httpOptions)
    .pipe(
      catchError(this.handleError)
    );
}

It appears that your data is invalid, resulting in a 400 Bad Request error. Additionally, your server is responding with the error message [Object object]. To handle this, consider using JSON.stringify on your server to provide accurate error messages in the response.

Answer 2

Make sure to include the Content-Type and Accept headers in your request.

import {HttpHeaders} from '@angular/common/http';

public addBooking(booking): Observable<any[]> {
  const httpOptions = {
    headers: new HttpHeaders({
      'Content-Type': 'application/json',
      'Accept': 'application/json'
    })
  };

  return this.http.post<any[]>(`${this.url}bookings`, booking, httpOptions)
    .pipe(
      catchError(this.handleError)
    );
}

It appears that your data is invalid, resulting in a 400 Bad Request error. Additionally, your server is responding with the error message [Object object]. To handle this, consider using JSON.stringify on your server to provide accurate error messages in the response.

Answer 3

Answer №2

One potential issue could be the absence of the 'Content-Type' set to 'application/json' in the headers. Another possibility is that the data under 'booking' may not be in JSON format and therefore does not include the required information.

Reminder: Ensure to specify the data being sent to the API (as well as the response).

Answer 4

One potential issue could be the absence of the 'Content-Type' set to 'application/json' in the headers. Another possibility is that the data under 'booking' may not be in JSON format and therefore does not include the required information.

Reminder: Ensure to specify the data being sent to the API (as well as the response).

After making a request with HttpClient, the response can either be an empty body or a body

Answer №1

Answer №2

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