Guide to setting headers to application/json in Angular 2

Question

Guide to setting headers to application/json in Angular 2

I've been attempting to send an HTTP post request in Angular 2, but I'm facing difficulties setting the headers to content type application JSON.

This is my current code:

login(url, postdata) {
    var headers = new Headers({'Content-Type': 'application/json'});
    return this._http.post(url, JSON.stringify(postdata), this.headers)
    .map(res => res.json())    
}

Upon checking the network, I noticed that the Content-Type is being set as text/plain, which results in the server not receiving any data. Any advice or suggestions would be greatly appreciated.

angular typescript post header

Answer 1

Answer №1

Here's a code snippet you can use:

private _getHeaders():Headers {
   let header = new Headers({
     'Content-Type': 'application/json'
   });

   return header;
}



public sendRequest(url, data){
   let options = new RequestOptions({
      headers: this._getHeaders()
   });
   return this.http.post(url, JSON.stringify(data),options).map(res => res.json());
}

Answer 2

Here's a code snippet you can use:

private _getHeaders():Headers {
   let header = new Headers({
     'Content-Type': 'application/json'
   });

   return header;
}



public sendRequest(url, data){
   let options = new RequestOptions({
      headers: this._getHeaders()
   });
   return this.http.post(url, JSON.stringify(data),options).map(res => res.json());
}

Answer 3

Answer №2

Adjusting parameters for _http.post:

login(url, postdata) {
    var headers = new Headers({'Content-Type': 'application/json'});
    return this._http.post(url, postdata, {headers:headers})
                .map(res => res.json())    
}

Answer 4

Adjusting parameters for _http.post:

login(url, postdata) {
    var headers = new Headers({'Content-Type': 'application/json'});
    return this._http.post(url, postdata, {headers:headers})
                .map(res => res.json())    
}

Answer 5

Answer №3

According to the Angular Http Guide, @angular/http has been deprecated in Angular 2, and it is recommended to use @angular/common/http instead. By default, if you do not specify http headers, the request will be sent as Content-Type text/plain. To modify the http headers, follow these steps:

import { HttpClient, HttpHeaders } from '@angular/common/http';
.....
const req = this.http.post('/api/PostRequest/',
                            JSON.stringify(object),
                            {
                             headers:new HttpHeaders()
                             .set('Content-Type','application/json')
                             }).subscribe();

Answer 6

According to the Angular Http Guide, @angular/http has been deprecated in Angular 2, and it is recommended to use @angular/common/http instead. By default, if you do not specify http headers, the request will be sent as Content-Type text/plain. To modify the http headers, follow these steps:

import { HttpClient, HttpHeaders } from '@angular/common/http';
.....
const req = this.http.post('/api/PostRequest/',
                            JSON.stringify(object),
                            {
                             headers:new HttpHeaders()
                             .set('Content-Type','application/json')
                             }).subscribe();

Answer 7

Answer №4

Here is an example of how to utilize code:

createHeaders() {
  let headers = new Headers();
  headers.append('Content-Type', 'application/json');

  let options = new RequestOptions({ headers: headers });
  return this.http.post(url, JSON.stringify(data), options).map(res => res.json());
}

Answer 8

Here is an example of how to utilize code:

createHeaders() {
  let headers = new Headers();
  headers.append('Content-Type', 'application/json');

  let options = new RequestOptions({ headers: headers });
  return this.http.post(url, JSON.stringify(data), options).map(res => res.json());
}

Answer 9

Answer №5

Angular 10 version for the year 2020

export class DataService {

  private headers = new HttpHeaders({
    'Content-Type': 'application/json',
  });

  constructor(
    private http: HttpClient
  ) {
  }

  fetch(path: string, params: HttpParams = new HttpParams()): Observable<any> {
    return this.http.get(`${environment.apiUrl}${path}`, {params, headers: this.headers});
  }
}

Answer 10

Angular 10 version for the year 2020

export class DataService {

  private headers = new HttpHeaders({
    'Content-Type': 'application/json',
  });

  constructor(
    private http: HttpClient
  ) {
  }

  fetch(path: string, params: HttpParams = new HttpParams()): Observable<any> {
    return this.http.get(`${environment.apiUrl}${path}`, {params, headers: this.headers});
  }
}

Guide to setting headers to application/json in Angular 2

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

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