Golang Gin框架中实现Server Sent Events(SSE)

被这个功能困扰了好久，一直没实现，因为网上的Gin框架实现的SSE都非常复杂，写成了一整套复杂的中间件，经过研究，写出了一套精简的实现。

SSE接口代码, 发送信息修改sendEvents内代码即可：

func ChatStreamSSE(ctx context.Context, c *gin.Context, req vo.ChatCompletionRequest) {
event := Event{
    ConversationId: uuid.New().String(),
    IsFinish:       false,
    IsReasoning:    false,
}

stream, err := openai.NewChatCompletionStream(ctx, req)
if err != nil {
    logger.Ex(ctx, tag, "NewChatCompletionStream:%+v", err)
    event.Content = fmt.Sprintf("new chat completion stream failed. err:[%+v]", err)
    event.IsFinish = true
    c.SSEvent("data", event)
    c.Writer.Flush()
    return
}
defer stream.Close()

for {
    streamData, streamErr := stream.Recv()
    if streamErr != nil && !errors.Is(streamErr, io.EOF) && streamErr.Error() != "EOF" {
        logger.Ex(ctx, tag, "stream data error: %v", streamErr)
        event.Content = fmt.Sprintf("stream data error: %v", streamErr)
        event.IsFinish = true
        c.SSEvent("data", event)
        c.Writer.Flush()
    }
    c.SSEvent("data", event)
    c.Writer.Flush()
}

return
}