c-data-channels is a Pion WebRTC application that shows how you can send/recv DataChannel messages from a web browser that's mostly identical to the pure Go implementation, https://github.com/pion/webrtc/tree/master/examples/data-channels. The main difference is that the OnDataChannel is fully implemented in C.

git clone https://github.com/pion/example-webrtc-applications.git

cd example-webrtc-applications/c-data-channels

make

jsfiddle.net

In the jsfiddle the top textarea is your browser's session description, copy that and:

Run echo $BROWSER_SDP | c-data-channels

1. Paste the SessionDescription into a file.
2. Run c-data-channels < my_file

Copy the text that c-data-channels just emitted and copy into second text area

Under Start Session you should see 'Checking' as it starts connecting. If everything worked you should see New DataChannel foo 1

Now you can put whatever you want in the Message textarea, and when you hit Send Message it should appear in your browser!

You can also type in your terminal, and when you hit enter it will appear in your web browser.

Congrats, you have used Pion WebRTC! Now start building something cool

This file contains all of the bridging between Go and C. This is the only file that contains cgo stuff.

This file is pure Go. It is mostly identical to the original data-channel example.

• golang/go#20639
• golang/go#25832
• https://github.com/pion/webrtc/tree/master/examples/data-channels/jsfiddle - jsfiddle source codes