Dart Requires Chilkat v11.0.0+

Example: Http.HttpJson method - Send a POST with JSON Body

See more HTTP Examples

Demonstrates how to call the HttpJson method, which sends an HTTP POST with a JSON body. This example sends the following request:

POST /echo_request_body.asp HTTP/1.1
Host: chilkatsoft.com
Accept: */*
Accept-Encoding: gzip
Content-Type: application/json
Content-Length: 26

{"greeting":"Hello World"}

Also see: Chilkat Http Default and Auto-Filled Headers

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  final http = CkHttp();

  final json = CkJsonObject();

  // Build the following JSON:  {"greeting":"Hello World"}
  json.updateString('greeting', 'Hello World');

  // This URL echoes the contents of the request body, letting us view it.
  final url = 'https://chilkatsoft.com/echo_request_body.asp';

  // Send a POST with the JSON in the HTTP request body.
  final resp = CkHttpResponse();
  try {
    http.httpJson('POST', url, json, 'application/json', resp);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  print('Response Status Code: ${resp.statusCode}');

  // Examine the request we sent.
  // The LastHeader property stores the HTTP request header of the most recent request sent,
  // and in this instance, the response body mirrors the request body.
  print(http.lastHeader);
  print(resp.bodyStr);

  // Output:

  // POST /echo_request_body.asp HTTP/1.1
  // Host: chilkatsoft.com
  // Accept: */*
  // Accept-Encoding: gzip
  // Content-Type: application/json
  // Content-Length: 26
  // 
  // {"greeting":"Hello World"}
}