dart_cronet_sample

A simple HTTP Client in Dart based on Cronet. (Version: 86.0.4240.198)

Disclaimer: This repository contains my experiments on binding cronet with dart. More refined and reviewed code will be available at: google/cronet.dart & my fork of it.

Ported from: https://chromium.googlesource.com/chromium/src/+/master/components/cronet/native/sample/

Checkout the Flutter version with Android support: https://github.com/unsuitable001/flutter_cronet_sample

Flutter (Android/Linux) support is now merged in this repository.

Usage

1. Add this to pubspec.yaml

   dependencies:
    cronet_sample:
      git:
        url: https://github.com/unsuitable001/dart_cronet_sample.git
   

2. Run this from the root of your project

   Desktop Platforms

   pub get
   pub run cronet_sample <platform>

   Supported platforms: linux64 and windows64

   Mobile Platforms (Flutter)

   flutter pub get

   Note: Internet connection is required to download cronet binaries.

3. Import

   import 'package:cronet_sample/cronet_sample.dart';

Example

  final client = HttpClient();
  client
      .getUrl(Uri.parse('http://info.cern.ch/'))
      .then((HttpClientRequest request) {
    return request.close();
  }).then((HttpClientResponse response) {
    response.transform(utf8.decoder).listen((contents) {
      print(contents);
    },
      onDone: () => print(
        'Done!'));
  });

Alternate API

  final client = HttpClient();
  client
      .getUrl(Uri.parse('http://info.cern.ch/'))
      .then((HttpClientRequest request) {
    request.registerCallbacks((data, bytesRead, responseCode, next) {
      print(utf8.decoder.convert(data));
      print('Status: $responseCode');
      next();
    },
        onSuccess: (responseCode) =>
            print('Done with status: $responseCode')).catchError(
        (e) => print(e));
  });

Build Guide

Want to build your own?

For building cronet: https://www.chromium.org/developers/how-tos/get-the-code & https://chromium.googlesource.com/chromium/src/+/master/components/cronet/build_instructions.md

For building wrapper:

From this repository root

cd lib/src/native/wrapper
./build.sh . '"cronet_version"'

Copy the wrapper binary to your project's root folder. Copy the cronet's binary to the cronet_binaries/<platform><arch> folder from project's root folder. (Except on Windows. There, everything will be on root dir only)

If you are in 64bit linux system, cronet_binaries/<platform><arch> will be cronet_binaries/linux64.

For Windows

Required: Visual Studio 2019 with C++ Desktop Development tools.

1. Make sure that you have cmake for Visual Studio 2019 is available in your command line. If not, you should open something like x64 Native Tools Command Prompt for VS 2019 from your start menu which will open a command prompt with required path set.

2. In the command prompt do -

   cd <path_to_repo>\lib\src\native\wrapper
   cmake CMakeLists.txt -B out
   cmake --build out

3. From there, go to out\Debug folder to get wrapper.dll

Run Example

From the root of the repo, run

cd example
flutter pub run cronet_sample <platform>
flutter run

or

cd example_dart
pub run cronet_sample <platform>
dart run

replace <platform> with linux64, windows64 or androidarm64-v8a