curl-unity

This is a C# wrapper for Unity to use libcurl with http/2 and openssl enabled.

Prebuilt platforms

• Windows x64
• macOS 64bit
• iOS arm64
• Android armv7/arm64/x86

Libraries

Name	Version
curl	7.67.0
nghttp2	1.39.2
openssl	1.1.1b

Build

Requirements

• CMake is required for all platforms.
• NDK r16b is required for Android.
• Xcode is required for macOS/iOS.
• Visual Studio 2017 is required for Windows.

Scripts

There are several build script under build folder for each platform:

All the scripts will auto deloy the output files into Assets/curl-unity/Plugins.

make_android.sh

Build libcurl.so for Android. Please use this script on macOS but it should also works on Linux.

make_ios.sh

Build libcurl.a for iOS. Please use this script on macOS

make_osx.sh

Build curl.bundle for macOS. Please use this script on macOS.

make_win.bat

Build curl.dll for Windows. Please use this script on Windows.

Install

Copy Assets/curl-unity to anywhere under your Unity project and done.

Optional

For a better performance you could enable Allow unsafe code and add ALLOW_UNSAFE to the Scripting Define Symbols in the project settings.

Usage

Select single thread/mutli thread mode

A CurlMultiUpdater component is needed to be created before any request and then you could check multiThread on or not.

Non-blocking multi perform

Only by using this multi perform that could take the advantage of HTTP/2 multiplexing feature.

void Start()
{
    for (int i = 0; i < 5; i++)
    {
        var easy = new CurlEasy();
        easy.url = "https://nghttp2.org";
        easy.timeout = 5000;
        // NOTICE: This callback may be invoked on other thread
        easy.performCallback = OnPerformCallback;

        // You could also create your own CurlMulti instance
        easy.MultiPerform(CurlMulti.DefaultMulti);
    }
}

void OnPerformCallback(CURLE result, CurlEasy easy)
{
    if (result == CURLE.OK)
    {
        Debug.Log(easy.inText);
    }
}

Non-blocking easy perform

Not recommended. You should take care of the thread safe issues and it can't be canceled before done.

async void Start()
{
    var easy = new CurlEasy();
    easy.url = "https://nghttp2.org";
    easy.timeout = 5000;
    if (await easy.PerformAsync() == CURLE.OK)
    {
        Debug.Log(easy.inText);
    }
}

Blocking easy perform

void Start()
{
    var easy = new CurlEasy();
    easy.url = "https://nghttp2.org";
    easy.timeout = 5000;
    if (easy.Perform() == CURLE.OK)
    {
        Debug.Log(easy.inText);
    }
}