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OpenAI Realtime API SDK for Golang

Go Reference Go Report Card codecov

This library provides unofficial Go clients for OpenAI Realtime API. We support all 9 client events and 28 server events.

Model Support:

  • gpt-4o-realtime-preview
  • gpt-4o-realtime-preview-2024-10-01

Installation

go get github.com/WqyJh/go-openai-realtime

Currently, go-openai-realtime requires Go version 1.19 or greater.

Usage

Connect to the OpenAI Realtime API. The default websocket library is coder/websocket.

package main

import (
	"bufio"
	"context"
	"fmt"
	"log"
	"os"

	openairt "github.com/WqyJh/go-openai-realtime"
)

func main() {
	client := openairt.NewClient("your-api-key")
	conn, err := client.Connect(context.Background())
	if err != nil {
		log.Fatal(err)
	}
	defer conn.Close()
}
Use another WebSocket dialer

Switch to another websocket dialer gorilla/websocket.

import (
	openairt "github.com/WqyJh/go-openai-realtime"
	gorilla "github.com/WqyJh/go-openai-realtime/contrib/ws-gorilla"
)

func main() {
	dialer := gorilla.NewWebSocketDialer(gorilla.WebSocketOptions{})
	conn, err := client.Connect(ctx, openairt.WithDialer(dialer))
	if err != nil {
		log.Fatal(err)
	}
	defer conn.Close()
Send message
import (
	openairt "github.com/WqyJh/go-openai-realtime"
)

func main() {
    err = conn.SendMessage(ctx, &openairt.SessionUpdateEvent{
        Session: openairt.ClientSession{
            Modalities: []openairt.Modality{openairt.ModalityText},
        },
    })
}
Read message

ReadMessage is a blocking method that reads the next message from the connection. It should be called in a standalone goroutine because it's blocking. If the returned error is Permanent, the future read operations on the same connection will not succeed, that means the connection is broken and should be closed or had already been closed.

	for {
		msg, err := c.conn.ReadMessage(ctx)
		if err != nil {
			var permanent *PermanentError
			if errors.As(err, &permanent) {
				return permanent.Err
			}
			c.conn.logger.Warnf("read message temporary error: %+v", err)
			continue
		}
		// handle message
	}
Subscribe to events

ConnHandler is a helper that reads messages from the server in a standalone goroutine and calls the registered handlers.

Call openairt.NewConnHandler to create a ConnHandler, then call Start to start a new goroutine to read messages. You can specify only one handler to handle all events or specify multiple handlers. It's recommended to specify multiple handlers for different purposes. The registered handlers will be called in the order of registration.

	connHandler := openairt.NewConnHandler(ctx, conn, handler1, handler2, ...)
	connHandler.Start()

A handler is function that handle ServerEvent. Use event.ServerEventType() to determine the type of the event. Based on the event type, you can get the event data by type assertion.

	// Teletype response
	responseDeltaHandler := func(ctx context.Context, event openairt.ServerEvent) {
		switch event.ServerEventType() {
		case openairt.ServerEventTypeResponseTextDelta:
			fmt.Printf(event.(openairt.ResponseTextDeltaEvent).Delta)
		}
	}

There's no need to Stop the ConnHandler, it will exit when the connection is closed. If you want to wait for the ConnHandler to exit, you can use Err(). This will return a channel to receive the error.

Note that the receive of the error channel is blocking, so make sure not to call conn.Close after it, which cause deadlock.

    conn.Close()
	err = <-connHandler.Err()
	if err != nil {
		log.Printf("connection error: %v", err)
	}

More examples

WebSocket Adapter

The default WebSocket adapter is coder/websocket. There's also a gorilla/websocket adapter. You can easily implement your own adapter by implementing the WebSocketConn interface and WebSocketDialer interface.

Supported adapters:

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Golang SDK for OpenAI Realtime API

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