mirror of
https://github.com/pion/webrtc.git
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98 lines
2.6 KiB
Go
98 lines
2.6 KiB
Go
package main
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import (
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"fmt"
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"time"
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"github.com/pion/webrtc/v3"
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"github.com/pion/webrtc/v3/examples/internal/signal"
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)
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func main() {
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// Everything below is the Pion WebRTC API! Thanks for using it ❤️.
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// Prepare the configuration
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config := webrtc.Configuration{
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ICEServers: []webrtc.ICEServer{
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{
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URLs: []string{"stun:stun.l.google.com:19302"},
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},
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},
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}
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// Create a new RTCPeerConnection
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peerConnection, err := webrtc.NewPeerConnection(config)
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if err != nil {
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panic(err)
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}
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// Create a datachannel with label 'data'
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dataChannel, err := peerConnection.CreateDataChannel("data", nil)
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if err != nil {
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panic(err)
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}
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// Set the handler for ICE connection state
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// This will notify you when the peer has connected/disconnected
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peerConnection.OnICEConnectionStateChange(func(connectionState webrtc.ICEConnectionState) {
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fmt.Printf("ICE Connection State has changed: %s\n", connectionState.String())
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})
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// Register channel opening handling
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dataChannel.OnOpen(func() {
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fmt.Printf("Data channel '%s'-'%d' open. Random messages will now be sent to any connected DataChannels every 5 seconds\n", dataChannel.Label(), dataChannel.ID())
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for range time.NewTicker(5 * time.Second).C {
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message := signal.RandSeq(15)
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fmt.Printf("Sending '%s'\n", message)
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// Send the message as text
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sendErr := dataChannel.SendText(message)
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if sendErr != nil {
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panic(sendErr)
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}
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}
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})
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// Register text message handling
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dataChannel.OnMessage(func(msg webrtc.DataChannelMessage) {
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fmt.Printf("Message from DataChannel '%s': '%s'\n", dataChannel.Label(), string(msg.Data))
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})
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// Create an offer to send to the browser
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offer, err := peerConnection.CreateOffer(nil)
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if err != nil {
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panic(err)
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}
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// Create channel that is blocked until ICE Gathering is complete
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gatherComplete := webrtc.GatheringCompletePromise(peerConnection)
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// Sets the LocalDescription, and starts our UDP listeners
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err = peerConnection.SetLocalDescription(offer)
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if err != nil {
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panic(err)
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}
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// Block until ICE Gathering is complete, disabling trickle ICE
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// we do this because we only can exchange one signaling message
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// in a production application you should exchange ICE Candidates via OnICECandidate
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<-gatherComplete
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// Output the answer in base64 so we can paste it in browser
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fmt.Println(signal.Encode(*peerConnection.LocalDescription()))
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// Wait for the answer to be pasted
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answer := webrtc.SessionDescription{}
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signal.Decode(signal.MustReadStdin(), &answer)
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// Apply the answer as the remote description
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err = peerConnection.SetRemoteDescription(answer)
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if err != nil {
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panic(err)
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}
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// Block forever
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select {}
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}
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