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Learn Dart #8: Perform a serverside POST request in under 30 seconds

Hello friends. In today’s quick tip we will be using the inbuilt HttpClient class to perform a server-side POST request.

Below is the full solution:

import 'dart:io';
import 'dart:convert';

main() async {
  var apiUrl = Uri.parse('');
  var client = HttpClient(); // `new` keyword optional

  // 1. Create request
  HttpClientRequest request = await client.postUrl(apiUrl);

  // 2. Add payload to request
  var payload = {
    'title': 'Post 1',
    'content': 'Lorem ipsum dolor sit amet',

  // 3. Send the request
  HttpClientResponse response = await request.close();

  // 4. Handle the response
  var resStream = response.transform(Utf8Decoder());
  await for (var data in resStream) {
    print('Received data: $data');

I’ll admit it’s a bit verbose. However the Dart team created a library called http to simplify this logic.

To install, update your pubspec.yaml file:

name: dart_project
  http: ^0.12.0

And run pub get to update your dependencies.

Here’s what the solution now looks like:

import 'package:http/http.dart' as http;

void main() async {
  var response = await'',
    body: {
      'title': 'Post 1',
      'content': 'Lorem ipsum dolor sit amet',


And run:

dart bin/main.dart

# Result:
# {
#   "title": "Post 1",
#   "content": "Lorem ipsum dolor sit amet",
#   "id": 101
# }

Further reading

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Jermaine Oppong

Hello 👋, I show programmers how to build full-stack web applications with the Dart SDK. I am passionate about teaching others, having received tremendous support on sites like and for my articles covering various aspects of the Dart language and ecosystem.

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