语音合成CosyVoice WebSocket API

Go

package main

import (
	"encoding/json"
	"fmt"
	"net/http"
	"os"
	"time"

	"github.com/google/uuid"
	"github.com/gorilla/websocket"
)

const (
	wsURL      = "wss://dashscope.aliyuncs.com/api-ws/v1/inference/" // WebSocket服务端地址
	outputFile = "output.mp3"                                        // 输出文件路径
)

func main() {
	// 若没有将API Key配置到环境变量，可将下行替换为：apiKey := "your_api_key"。不建议在生产环境中直接将API Key硬编码到代码中，以减少API Key泄露风险。
	apiKey := os.Getenv("DASHSCOPE_API_KEY")
	// 检查并清空输出文件
	if err := clearOutputFile(outputFile); err != nil {
		fmt.Println("清空输出文件失败：", err)
		return
	}

	// 连接WebSocket服务
	conn, err := connectWebSocket(apiKey)
	if err != nil {
		fmt.Println("连接WebSocket失败：", err)
		return
	}
	defer closeConnection(conn)

	// 启动一个goroutine来接收结果
	done, taskStarted := startResultReceiver(conn)

	// 发送run-task指令
	taskID, err := sendRunTaskCmd(conn)
	if err != nil {
		fmt.Println("发送run-task指令失败：", err)
		return
	}

	// 等待task-started事件
	for !*taskStarted {
		time.Sleep(100 * time.Millisecond)
	}

	// 发送待合成文本
	if err := sendContinueTaskCmd(conn, taskID); err != nil {
		fmt.Println("发送待合成文本失败：", err)
		return
	}

	// 发送finish-task指令
	if err := sendFinishTaskCmd(conn, taskID); err != nil {
		fmt.Println("发送finish-task指令失败：", err)
		return
	}

	// 等待接收结果的goroutine完成
	<-done
}

var dialer = websocket.DefaultDialer

// 定义结构体来表示JSON数据
type Header struct {
	Action       string                 `json:"action"`
	TaskID       string                 `json:"task_id"`
	Streaming    string                 `json:"streaming"`
	Event        string                 `json:"event"`
	ErrorCode    string                 `json:"error_code,omitempty"`
	ErrorMessage string                 `json:"error_message,omitempty"`
	Attributes   map[string]interface{} `json:"attributes"`
}

type Payload struct {
	TaskGroup  string     `json:"task_group"`
	Task       string     `json:"task"`
	Function   string     `json:"function"`
	Model      string     `json:"model"`
	Parameters Params     `json:"parameters"`
	Resources  []Resource `json:"resources"`
	Input      Input      `json:"input"`
}

type Params struct {
	TextType   string `json:"text_type"`
	Voice      string `json:"voice"`
	Format     string `json:"format"`
	SampleRate int    `json:"sample_rate"`
	Volume     int    `json:"volume"`
	Rate       int    `json:"rate"`
	Pitch      int    `json:"pitch"`
}

type Resource struct {
	ResourceID   string `json:"resource_id"`
	ResourceType string `json:"resource_type"`
}

type Input struct {
	Text string `json:"text"`
}

type Event struct {
	Header  Header  `json:"header"`
	Payload Payload `json:"payload"`
}

// 连接WebSocket服务
func connectWebSocket(apiKey string) (*websocket.Conn, error) {
	header := make(http.Header)
	header.Add("X-DashScope-DataInspection", "enable")
	header.Add("Authorization", fmt.Sprintf("bearer %s", apiKey))
	conn, _, err := dialer.Dial(wsURL, header)
	if err != nil {
		fmt.Println("连接WebSocket失败：", err)
		return nil, err
	}
	return conn, nil
}

// 发送run-task指令
func sendRunTaskCmd(conn *websocket.Conn) (string, error) {
	runTaskCmd, taskID, err := generateRunTaskCmd()
	if err != nil {
		return "", err
	}
	err = conn.WriteMessage(websocket.TextMessage, []byte(runTaskCmd))
	return taskID, err
}

// 生成run-task指令
func generateRunTaskCmd() (string, string, error) {
	taskID := uuid.New().String()
	runTaskCmd := Event{
		Header: Header{
			Action:    "run-task",
			TaskID:    taskID,
			Streaming: "duplex",
		},
		Payload: Payload{
			TaskGroup: "audio",
			Task:      "tts",
			Function:  "SpeechSynthesizer",
			Model:     "cosyvoice-v2",
			Parameters: Params{
				TextType:   "PlainText",
				Voice:      "longxiaochun_v2",
				Format:     "mp3",
				SampleRate: 22050,
				Volume:     50,
				Rate:       1,
				Pitch:      1,
			},
			Input: Input{},
		},
	}
	runTaskCmdJSON, err := json.Marshal(runTaskCmd)
	return string(runTaskCmdJSON), taskID, err
}

// 发送待合成文本
func sendContinueTaskCmd(conn *websocket.Conn, taskID string) error {
	texts := []string{"床前明月光", "疑是地上霜", "举头望明月", "低头思故乡"}

	for _, text := range texts {
		runTaskCmd, err := generateContinueTaskCmd(text, taskID)
		if err != nil {
			return err
		}

		err = conn.WriteMessage(websocket.TextMessage, []byte(runTaskCmd))
		if err != nil {
			return err
		}
	}

	return nil
}

// 生成continue-task指令
func generateContinueTaskCmd(text string, taskID string) (string, error) {
	runTaskCmd := Event{
		Header: Header{
			Action:    "continue-task",
			TaskID:    taskID,
			Streaming: "duplex",
		},
		Payload: Payload{
			Input: Input{
				Text: text,
			},
		},
	}
	runTaskCmdJSON, err := json.Marshal(runTaskCmd)
	return string(runTaskCmdJSON), err
}

// 启动一个goroutine来接收结果
func startResultReceiver(conn *websocket.Conn) (chan struct{}, *bool) {
	done := make(chan struct{})
	taskStarted := new(bool)
	*taskStarted = false

	go func() {
		defer close(done)
		for {
			msgType, message, err := conn.ReadMessage()
			if err != nil {
				fmt.Println("解析服务器消息失败：", err)
				return
			}

			if msgType == websocket.BinaryMessage {
				// 处理二进制音频流
				if err := writeBinaryDataToFile(message, outputFile); err != nil {
					fmt.Println("写入二进制数据失败：", err)
					return
				}
			} else {
				// 处理文本消息
				var event Event
				err = json.Unmarshal(message, &event)
				if err != nil {
					fmt.Println("解析事件失败：", err)
					continue
				}
				if handleEvent(conn, event, taskStarted) {
					return
				}
			}
		}
	}()

	return done, taskStarted
}

// 处理事件
func handleEvent(conn *websocket.Conn, event Event, taskStarted *bool) bool {
	switch event.Header.Event {
	case "task-started":
		fmt.Println("收到task-started事件")
		*taskStarted = true
	case "result-generated":
		// 忽略result-generated事件
		return false
	case "task-finished":
		fmt.Println("任务完成")
		return true
	case "task-failed":
		handleTaskFailed(event, conn)
		return true
	default:
		fmt.Printf("预料之外的事件：%v\n", event)
	}
	return false
}

// 处理任务失败事件
func handleTaskFailed(event Event, conn *websocket.Conn) {
	if event.Header.ErrorMessage != "" {
		fmt.Printf("任务失败：%s\n", event.Header.ErrorMessage)
	} else {
		fmt.Println("未知原因导致任务失败")
	}
}

// 关闭连接
func closeConnection(conn *websocket.Conn) {
	if conn != nil {
		conn.Close()
	}
}

// 写入二进制数据到文件
func writeBinaryDataToFile(data []byte, filePath string) error {
	file, err := os.OpenFile(filePath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
	if err != nil {
		return err
	}
	defer file.Close()

	_, err = file.Write(data)
	if err != nil {
		return err
	}

	return nil
}

// 发送finish-task指令
func sendFinishTaskCmd(conn *websocket.Conn, taskID string) error {
	finishTaskCmd, err := generateFinishTaskCmd(taskID)
	if err != nil {
		return err
	}
	err = conn.WriteMessage(websocket.TextMessage, []byte(finishTaskCmd))
	return err
}

// 生成finish-task指令
func generateFinishTaskCmd(taskID string) (string, error) {
	finishTaskCmd := Event{
		Header: Header{
			Action:    "finish-task",
			TaskID:    taskID,
			Streaming: "duplex",
		},
		Payload: Payload{
			Input: Input{},
		},
	}
	finishTaskCmdJSON, err := json.Marshal(finishTaskCmd)
	return string(finishTaskCmdJSON), err
}

// 清空输出文件
func clearOutputFile(filePath string) error {
	file, err := os.OpenFile(filePath, os.O_TRUNC|os.O_CREATE|os.O_WRONLY, 0644)
	if err != nil {
		return err
	}
	file.Close()
	return nil
}

C#

using System.Net.WebSockets;
using System.Text;
using System.Text.Json;

class Program {
    // 若没有将API Key配置到环境变量，可将下行替换为：private const string ApiKey="your_api_key"。不建议在生产环境中直接将API Key硬编码到代码中，以减少API Key泄露风险。
    private static readonly string ApiKey = Environment.GetEnvironmentVariable("DASHSCOPE_API_KEY") ?? throw new InvalidOperationException("DASHSCOPE_API_KEY environment variable is not set.");

    // WebSocket服务器地址
    private const string WebSocketUrl = "wss://dashscope.aliyuncs.com/api-ws/v1/inference/";
    // 输出文件路径
    private const string OutputFilePath = "output.mp3";

    // WebSocket客户端
    private static ClientWebSocket _webSocket = new ClientWebSocket();
    // 取消令牌源
    private static CancellationTokenSource _cancellationTokenSource = new CancellationTokenSource();
    // 任务ID
    private static string? _taskId;
    // 任务是否已启动
    private static TaskCompletionSource<bool> _taskStartedTcs = new TaskCompletionSource<bool>();

    static async Task Main(string[] args) {
        try {
            // 清空输出文件
            ClearOutputFile(OutputFilePath);

            // 连接WebSocket服务
            await ConnectToWebSocketAsync(WebSocketUrl);

            // 启动接收消息的任务
            Task receiveTask = ReceiveMessagesAsync();

            // 发送run-task指令
            _taskId = GenerateTaskId();
            await SendRunTaskCommandAsync(_taskId);

            // 等待task-started事件
            await _taskStartedTcs.Task;

            // 持续发送continue-task指令
            string[] texts = {
                "床前明月光",
                "疑是地上霜",
                "举头望明月",
                "低头思故乡"
            };
            foreach (string text in texts) {
                await SendContinueTaskCommandAsync(text);
            }

            // 发送finish-task指令
            await SendFinishTaskCommandAsync(_taskId);

            // 等待接收任务完成
            await receiveTask;

            Console.WriteLine("任务完成，连接已关闭。");
        } catch (OperationCanceledException) {
            Console.WriteLine("任务被取消。");
        } catch (Exception ex) {
            Console.WriteLine($"发生错误：{ex.Message}");
        } finally {
            _cancellationTokenSource.Cancel();
            _webSocket.Dispose();
        }
    }

    private static void ClearOutputFile(string filePath) {
        if (File.Exists(filePath)) {
            File.WriteAllText(filePath, string.Empty);
            Console.WriteLine("输出文件已清空。");
        } else {
            Console.WriteLine("输出文件不存在，无需清空。");
        }
    }

    private static async Task ConnectToWebSocketAsync(string url) {
        var uri = new Uri(url);
        if (_webSocket.State == WebSocketState.Connecting || _webSocket.State == WebSocketState.Open) {
            return;
        }

        // 设置WebSocket连接的头部信息
        _webSocket.Options.SetRequestHeader("Authorization", $"bearer {ApiKey}");
        _webSocket.Options.SetRequestHeader("X-DashScope-DataInspection", "enable");

        try {
            await _webSocket.ConnectAsync(uri, _cancellationTokenSource.Token);
            Console.WriteLine("已成功连接到WebSocket服务。");
        } catch (OperationCanceledException) {
            Console.WriteLine("WebSocket连接被取消。");
        } catch (Exception ex) {
            Console.WriteLine($"WebSocket连接失败: {ex.Message}");
            throw;
        }
    }

    private static async Task SendRunTaskCommandAsync(string taskId) {
        var command = CreateCommand("run-task", taskId, "duplex", new {
            task_group = "audio",
            task = "tts",
            function = "SpeechSynthesizer",
            model = "cosyvoice-v2",
            parameters = new
            {
                text_type = "PlainText",
                voice = "longxiaochun_v2",
                format = "mp3",
                sample_rate = 22050,
                volume = 50,
                rate = 1,
                pitch = 1
            },
            input = new { }
        });

        await SendJsonMessageAsync(command);
        Console.WriteLine("已发送run-task指令。");
    }

    private static async Task SendContinueTaskCommandAsync(string text) {
        if (_taskId == null) {
            throw new InvalidOperationException("任务ID未初始化。");
        }

        var command = CreateCommand("continue-task", _taskId, "duplex", new {
            input = new {
                text
            }
        });

        await SendJsonMessageAsync(command);
        Console.WriteLine("已发送continue-task指令。");
    }

    private static async Task SendFinishTaskCommandAsync(string taskId) {
        var command = CreateCommand("finish-task", taskId, "duplex", new {
            input = new { }
        });

        await SendJsonMessageAsync(command);
        Console.WriteLine("已发送finish-task指令。");
    }

    private static async Task SendJsonMessageAsync(string message) {
        var buffer = Encoding.UTF8.GetBytes(message);
        try {
            await _webSocket.SendAsync(new ArraySegment<byte>(buffer), WebSocketMessageType.Text, true, _cancellationTokenSource.Token);
        } catch (OperationCanceledException) {
            Console.WriteLine("消息发送被取消。");
        }
    }

    private static async Task ReceiveMessagesAsync() {
        while (_webSocket.State == WebSocketState.Open) {
            var response = await ReceiveMessageAsync();
            if (response != null) {
                var eventStr = response.RootElement.GetProperty("header").GetProperty("event").GetString();
                switch (eventStr) {
                    case "task-started":
                        Console.WriteLine("任务已启动。");
                        _taskStartedTcs.TrySetResult(true);
                        break;
                    case "task-finished":
                        Console.WriteLine("任务已完成。");
                        _cancellationTokenSource.Cancel();
                        break;
                    case "task-failed":
                        Console.WriteLine("任务失败。");
                        _cancellationTokenSource.Cancel();
                        break;
                    default:
                        // result-generated可在此处理
                        break;
                }
            }
        }
    }

    private static async Task<JsonDocument?> ReceiveMessageAsync() {
        var buffer = new byte[1024 * 4];
        var segment = new ArraySegment<byte>(buffer);

        try {
            WebSocketReceiveResult result = await _webSocket.ReceiveAsync(segment, _cancellationTokenSource.Token);

            if (result.MessageType == WebSocketMessageType.Close) {
                await _webSocket.CloseAsync(WebSocketCloseStatus.NormalClosure, "Closing", _cancellationTokenSource.Token);
                return null;
            }

            if (result.MessageType == WebSocketMessageType.Binary) {
                // 处理二进制数据
                Console.WriteLine("接收到二进制数据...");

                // 将二进制数据保存到文件
                using (var fileStream = new FileStream(OutputFilePath, FileMode.Append)) {
                    fileStream.Write(buffer, 0, result.Count);
                }

                return null;
            }

            string message = Encoding.UTF8.GetString(buffer, 0, result.Count);
            return JsonDocument.Parse(message);
        } catch (OperationCanceledException) {
            Console.WriteLine("消息接收被取消。");
            return null;
        }
    }

    private static string GenerateTaskId() {
        return Guid.NewGuid().ToString("N").Substring(0, 32);
    }

    private static string CreateCommand(string action, string taskId, string streaming, object payload) {
        var command = new {
            header = new {
                action,
                task_id = taskId,
                streaming
            },
            payload
        };

        return JsonSerializer.Serialize(command);
    }
}

PHP

示例代码目录结构为：

my-php-project/

├── composer.json

├── vendor/

└── index.php

composer.json内容如下，相关依赖的版本号请根据实际情况自行决定：

{
    "require": {
        "react/event-loop": "^1.3",
        "react/socket": "^1.11",
        "react/stream": "^1.2",
        "react/http": "^1.1",
        "ratchet/pawl": "^0.4"
    },
    "autoload": {
        "psr-4": {
            "App\\": "src/"
        }
    }
}

index.php内容如下：

<?php

require __DIR__ . '/vendor/autoload.php';

use Ratchet\Client\Connector;
use React\EventLoop\Loop;
use React\Socket\Connector as SocketConnector;

# 若没有将API Key配置到环境变量，可将下行替换为：$api_key="your_api_key"。不建议在生产环境中直接将API Key硬编码到代码中，以减少API Key泄露风险。
$api_key = getenv("DASHSCOPE_API_KEY");
$websocket_url = 'wss://dashscope.aliyuncs.com/api-ws/v1/inference/'; // WebSocket服务器地址
$output_file = 'output.mp3'; // 输出文件路径

$loop = Loop::get();

if (file_exists($output_file)) {
    // 清空文件内容
    file_put_contents($output_file, '');
}

// 创建自定义的连接器
$socketConnector = new SocketConnector($loop, [
    'tcp' => [
        'bindto' => '0.0.0.0:0',
    ],
    'tls' => [
        'verify_peer' => false,
        'verify_peer_name' => false,
    ],
]);

$connector = new Connector($loop, $socketConnector);

$headers = [
    'Authorization' => 'bearer ' . $api_key,
    'X-DashScope-DataInspection' => 'enable'
];

$connector($websocket_url, [], $headers)->then(function ($conn) use ($loop, $output_file) {
    echo "连接到WebSocket服务器\n";

    // 生成任务ID
    $taskId = generateTaskId();

    // 发送 run-task 指令
    sendRunTaskMessage($conn, $taskId);

    // 定义发送 continue-task 指令的函数
    $sendContinueTask = function() use ($conn, $loop, $taskId) {
        // 待发送的文本
        $texts = ["床前明月光", "疑是地上霜", "举头望明月", "低头思故乡"];
        $continueTaskCount = 0;
        foreach ($texts as $text) {
            $continueTaskMessage = json_encode([
                "header" => [
                    "action" => "continue-task",
                    "task_id" => $taskId,
                    "streaming" => "duplex"
                ],
                "payload" => [
                    "input" => [
                        "text" => $text
                    ]
                ]
            ]);
            echo "准备发送continue-task指令: " . $continueTaskMessage . "\n";
            $conn->send($continueTaskMessage);
            $continueTaskCount++;
        }
        echo "发送的continue-task指令个数为：" . $continueTaskCount . "\n";

        // 发送 finish-task 指令
        sendFinishTaskMessage($conn, $taskId);
    };

    // 标记是否收到 task-started 事件
    $taskStarted = false;

    // 监听消息
    $conn->on('message', function($msg) use ($conn, $sendContinueTask, $loop, &$taskStarted, $taskId, $output_file) {
        if ($msg->isBinary()) {
            // 写入二进制数据到本地文件
            file_put_contents($output_file, $msg->getPayload(), FILE_APPEND);
        } else {
            // 处理非二进制消息
            $response = json_decode($msg, true);

            if (isset($response['header']['event'])) {
                handleEvent($conn, $response, $sendContinueTask, $loop, $taskId, $taskStarted);
            } else {
                echo "未知的消息格式\n";
            }
        }
    });

    // 监听连接关闭
    $conn->on('close', function($code = null, $reason = null) {
        echo "连接已关闭\n";
        if ($code !== null) {
            echo "关闭代码: " . $code . "\n";
        }
        if ($reason !== null) {
            echo "关闭原因：" . $reason . "\n";
        }
    });
}, function ($e) {
    echo "无法连接：{$e->getMessage()}\n";
});

$loop->run();

/**
 * 生成任务ID
 * @return string
 */
function generateTaskId(): string {
    return bin2hex(random_bytes(16));
}

/**
 * 发送 run-task 指令
 * @param $conn
 * @param $taskId
 */
function sendRunTaskMessage($conn, $taskId) {
    $runTaskMessage = json_encode([
        "header" => [
            "action" => "run-task",
            "task_id" => $taskId,
            "streaming" => "duplex"
        ],
        "payload" => [
            "task_group" => "audio",
            "task" => "tts",
            "function" => "SpeechSynthesizer",
            "model" => "cosyvoice-v2",
            "parameters" => [
                "text_type" => "PlainText",
                "voice" => "longxiaochun_v2",
                "format" => "mp3",
                "sample_rate" => 22050,
                "volume" => 50,
                "rate" => 1,
                "pitch" => 1
            ],
            "input" => (object) []
        ]
    ]);
    echo "准备发送run-task指令: " . $runTaskMessage . "\n";
    $conn->send($runTaskMessage);
    echo "run-task指令已发送\n";
}

/**
 * 读取音频文件
 * @param string $filePath
 * @return bool|string
 */
function readAudioFile(string $filePath) {
    $voiceData = file_get_contents($filePath);
    if ($voiceData === false) {
        echo "无法读取音频文件\n";
    }
    return $voiceData;
}

/**
 * 分割音频数据
 * @param string $data
 * @param int $chunkSize
 * @return array
 */
function splitAudioData(string $data, int $chunkSize): array {
    return str_split($data, $chunkSize);
}

/**
 * 发送 finish-task 指令
 * @param $conn
 * @param $taskId
 */
function sendFinishTaskMessage($conn, $taskId) {
    $finishTaskMessage = json_encode([
        "header" => [
            "action" => "finish-task",
            "task_id" => $taskId,
            "streaming" => "duplex"
        ],
        "payload" => [
            "input" => (object) []
        ]
    ]);
    echo "准备发送finish-task指令: " . $finishTaskMessage . "\n";
    $conn->send($finishTaskMessage);
    echo "finish-task指令已发送\n";
}

/**
 * 处理事件
 * @param $conn
 * @param $response
 * @param $sendContinueTask
 * @param $loop
 * @param $taskId
 * @param $taskStarted
 */
function handleEvent($conn, $response, $sendContinueTask, $loop, $taskId, &$taskStarted) {
    switch ($response['header']['event']) {
        case 'task-started':
            echo "任务开始，发送continue-task指令...\n";
            $taskStarted = true;
            // 发送 continue-task 指令
            $sendContinueTask();
            break;
        case 'result-generated':
            // 忽略result-generated事件
            break;
        case 'task-finished':
            echo "任务完成\n";
            $conn->close();
            break;
        case 'task-failed':
            echo "任务失败\n";
            echo "错误代码：" . $response['header']['error_code'] . "\n";
            echo "错误信息：" . $response['header']['error_message'] . "\n";
            $conn->close();
            break;
        case 'error':
            echo "错误：" . $response['payload']['message'] . "\n";
            break;
        default:
            echo "未知事件：" . $response['header']['event'] . "\n";
            break;
    }

    // 如果任务已完成，关闭连接
    if ($response['header']['event'] == 'task-finished') {
        // 等待1秒以确保所有数据都已传输完毕
        $loop->addTimer(1, function() use ($conn) {
            $conn->close();
            echo "客户端关闭连接\n";
        });
    }

    // 如果没有收到 task-started 事件，关闭连接
    if (!$taskStarted && in_array($response['header']['event'], ['task-failed', 'error'])) {
        $conn->close();
    }
}

Node.js

需安装相关依赖：

npm install ws
npm install uuid

示例代码如下：

const WebSocket = require('ws');
const fs = require('fs');
const uuid = require('uuid').v4;

// 若没有将API Key配置到环境变量，可将下行替换为：apiKey = 'your_api_key'。不建议在生产环境中直接将API Key硬编码到代码中，以减少API Key泄露风险。
const apiKey = process.env.DASHSCOPE_API_KEY;
// WebSocket服务器地址
const url = 'wss://dashscope.aliyuncs.com/api-ws/v1/inference/';
// 输出文件路径
const outputFilePath = 'output.mp3';

// 清空输出文件
fs.writeFileSync(outputFilePath, '');

// 创建WebSocket客户端
const ws = new WebSocket(url, {
  headers: {
    Authorization: `bearer ${apiKey}`,
    'X-DashScope-DataInspection': 'enable'
  }
});

let taskStarted = false;
let taskId = uuid();

ws.on('open', () => {
  console.log('已连接到WebSocket服务器');

  // 发送run-task指令
  const runTaskMessage = JSON.stringify({
    header: {
      action: 'run-task',
      task_id: taskId,
      streaming: 'duplex'
    },
    payload: {
      task_group: 'audio',
      task: 'tts',
      function: 'SpeechSynthesizer',
      model: 'cosyvoice-v2',
      parameters: {
        text_type: 'PlainText',
        voice: 'longxiaochun_v2', // 音色
        format: 'mp3', // 音频格式
        sample_rate: 22050, // 采样率
        volume: 50, // 音量
        rate: 1, // 语速
        pitch: 1 // 音调
      },
      input: {}
    }
  });
  ws.send(runTaskMessage);
  console.log('已发送run-task消息');
});

const fileStream = fs.createWriteStream(outputFilePath, { flags: 'a' });
ws.on('message', (data, isBinary) => {
  if (isBinary) {
    // 写入二进制数据到文件
    fileStream.write(data);
  } else {
    const message = JSON.parse(data);

    switch (message.header.event) {
      case 'task-started':
        taskStarted = true;
        console.log('任务已开始');
        // 发送continue-task指令
        sendContinueTasks(ws);
        break;
      case 'task-finished':
        console.log('任务已完成');
        ws.close();
        fileStream.end(() => {
          console.log('文件流已关闭');
        });
        break;
      case 'task-failed':
        console.error('任务失败：', message.header.error_message);
        ws.close();
        fileStream.end(() => {
          console.log('文件流已关闭');
        });
        break;
      default:
        // 可以在这里处理result-generated
        break;
    }
  }
});

function sendContinueTasks(ws) {
  const texts = [
    '床前明月光，',
    '疑是地上霜。',
    '举头望明月，',
    '低头思故乡。'
  ];
  
  texts.forEach((text, index) => {
    setTimeout(() => {
      if (taskStarted) {
        const continueTaskMessage = JSON.stringify({
          header: {
            action: 'continue-task',
            task_id: taskId,
            streaming: 'duplex'
          },
          payload: {
            input: {
              text: text
            }
          }
        });
        ws.send(continueTaskMessage);
        console.log(`已发送continue-task，文本：${text}`);
      }
    }, index * 1000); // 每隔1秒发送一次
  });

  // 发送finish-task指令
  setTimeout(() => {
    if (taskStarted) {
      const finishTaskMessage = JSON.stringify({
        header: {
          action: 'finish-task',
          task_id: taskId,
          streaming: 'duplex'
        },
        payload: {
          input: {}
        }
      });
      ws.send(finishTaskMessage);
      console.log('已发送finish-task');
    }
  }, texts.length * 1000 + 1000); // 在所有continue-task指令发送完毕后1秒发送
}

ws.on('close', () => {
  console.log('已断开与WebSocket服务器的连接');
});

Java

如您使用Java编程语言，建议采用Java DashScope SDK进行开发，详情请参见Java SDK。

以下是Java WebSocket的调用示例。在运行示例前，请确保已导入以下依赖：

• Java-WebSocket

• jackson-databind

推荐您使用Maven或Gradle管理依赖包，其配置如下：

<dependencies>
    <!-- WebSocket Client -->
    <dependency>
        <groupId>org.java-websocket</groupId>
        <artifactId>Java-WebSocket</artifactId>
        <version>1.5.3</version>
    </dependency>

    <!-- JSON Processing -->
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.13.0</version>
    </dependency>
</dependencies>

// 省略其它代码
dependencies {
  // WebSocket Client
  implementation 'org.java-websocket:Java-WebSocket:1.5.3'
  // JSON Processing
  implementation 'com.fasterxml.jackson.core:jackson-databind:2.13.0'
}
// 省略其它代码

Java代码如下：

import com.fasterxml.jackson.databind.ObjectMapper;

import org.java_websocket.client.WebSocketClient;
import org.java_websocket.handshake.ServerHandshake;

import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URI;
import java.nio.ByteBuffer;
import java.util.*;

public class TTSWebSocketClient extends WebSocketClient {
    private final String taskId = UUID.randomUUID().toString();
    private final String outputFile = "output_" + System.currentTimeMillis() + ".mp3";
    private boolean taskFinished = false;

    public TTSWebSocketClient(URI serverUri, Map<String, String> headers) {
        super(serverUri, headers);
    }

    @Override
    public void onOpen(ServerHandshake serverHandshake) {
        System.out.println("连接成功");

        // 发送run-task指令
        String runTaskCommand = "{ \"header\": { \"action\": \"run-task\", \"task_id\": \"" + taskId + "\", \"streaming\": \"duplex\" }, \"payload\": { \"task_group\": \"audio\", \"task\": \"tts\", \"function\": \"SpeechSynthesizer\", \"model\": \"cosyvoice-v2\", \"parameters\": { \"text_type\": \"PlainText\", \"voice\": \"longxiaochun_v2\", \"format\": \"mp3\", \"sample_rate\": 22050, \"volume\": 50, \"rate\": 1, \"pitch\": 1 }, \"input\": {} }}";
        send(runTaskCommand);
    }

    @Override
    public void onMessage(String message) {
        System.out.println("收到服务端返回的消息：" + message);
        try {
            // Parse JSON message
            Map<String, Object> messageMap = new ObjectMapper().readValue(message, Map.class);

            if (messageMap.containsKey("header")) {
                Map<String, Object> header = (Map<String, Object>) messageMap.get("header");

                if (header.containsKey("event")) {
                    String event = (String) header.get("event");

                    if ("task-started".equals(event)) {
                        System.out.println("收到服务端返回的task-started事件");

                        List<String> texts = Arrays.asList(
                                "床前明月光，疑是地上霜",
                                "举头望明月，低头思故乡"
                        );

                        for (String text : texts) {
                            // 发送continue-task指令
                            sendContinueTask(text);
                        }

                        // 发送finish-task指令
                        sendFinishTask();
                    } else if ("task-finished".equals(event)) {
                        System.out.println("收到服务端返回的task-finished事件");
                        taskFinished = true;
                        closeConnection();
                    } else if ("task-failed".equals(event)) {
                        System.out.println("任务失败：" + message);
                        closeConnection();
                    }
                }
            }
        } catch (Exception e) {
            System.err.println("出现异常：" + e.getMessage());
        }
    }

    @Override
    public void onMessage(ByteBuffer message) {
        System.out.println("收到的二进制音频数据大小为：" + message.remaining());

        try (FileOutputStream fos = new FileOutputStream(outputFile, true)) {
            byte[] buffer = new byte[message.remaining()];
            message.get(buffer);
            fos.write(buffer);
            System.out.println("音频数据已写入本地文件" + outputFile + "中");
        } catch (IOException e) {
            System.err.println("音频数据写入本地文件失败：" + e.getMessage());
        }
    }

    @Override
    public void onClose(int code, String reason, boolean remote) {
        System.out.println("连接关闭：" + reason + " (" + code + ")");
    }

    @Override
    public void onError(Exception ex) {
        System.err.println("报错：" + ex.getMessage());
        ex.printStackTrace();
    }

    private void sendContinueTask(String text) {
        String command = "{ \"header\": { \"action\": \"continue-task\", \"task_id\": \"" + taskId + "\", \"streaming\": \"duplex\" }, \"payload\": { \"input\": { \"text\": \"" + text + "\" } }}";
        send(command);
    }

    private void sendFinishTask() {
        String command = "{ \"header\": { \"action\": \"finish-task\", \"task_id\": \"" + taskId + "\", \"streaming\": \"duplex\" }, \"payload\": { \"input\": {} }}";
        send(command);
    }

    private void closeConnection() {
        if (!isClosed()) {
            close();
        }
    }

    public static void main(String[] args) {
        try {
            String apiKey = System.getenv("DASHSCOPE_API_KEY");
            if (apiKey == null || apiKey.isEmpty()) {
                System.err.println("请设置 DASHSCOPE_API_KEY 环境变量");
                return;
            }

            Map<String, String> headers = new HashMap<>();
            headers.put("Authorization", "bearer " + apiKey);
            TTSWebSocketClient client = new TTSWebSocketClient(new URI("wss://dashscope.aliyuncs.com/api-ws/v1/inference/"), headers);

            client.connect();

            while (!client.isClosed() && !client.taskFinished) {
                Thread.sleep(1000);
            }
        } catch (Exception e) {
            System.err.println("连接WebSocket服务失败：" + e.getMessage());
            e.printStackTrace();
        }
    }
}

Python

如您使用Python编程语言，建议采用Python DashScope SDK进行开发，详情请参见Python SDK。

以下是Python WebSocket的调用示例。在运行示例前，请确保通过如下方式导入依赖：

pip uninstall websocket-client
pip uninstall websocket
pip install websocket-client

import websocket
import json
import uuid
import os
import time


class TTSClient:
    def __init__(self, api_key, uri):
        """
    初始化 TTSClient 实例

    参数:
        api_key (str): 鉴权用的 API Key
        uri (str): WebSocket 服务地址
    """
        self.api_key = api_key  # 替换为你的 API Key
        self.uri = uri  # 替换为你的 WebSocket 地址
        self.task_id = str(uuid.uuid4())  # 生成唯一任务 ID
        self.output_file = f"output_{int(time.time())}.mp3"  # 输出音频文件路径
        self.ws = None  # WebSocketApp 实例
        self.task_started = False  # 是否收到 task-started
        self.task_finished = False  # 是否收到 task-finished / task-failed

    def on_open(self, ws):
        """
    WebSocket 连接建立时回调函数
    发送 run-task 指令开启语音合成任务
    """
        print("WebSocket 已连接")

        # 构造 run-task 指令
        run_task_cmd = {
            "header": {
                "action": "run-task",
                "task_id": self.task_id,
                "streaming": "duplex"
            },
            "payload": {
                "task_group": "audio",
                "task": "tts",
                "function": "SpeechSynthesizer",
                "model": "cosyvoice-v2",
                "parameters": {
                    "text_type": "PlainText",
                    "voice": "longxiaochun_v2",
                    "format": "mp3",
                    "sample_rate": 22050,
                    "volume": 50,
                    "rate": 1,
                    "pitch": 1
                },
                "input": {}
            }
        }

        # 发送 run-task 指令
        ws.send(json.dumps(run_task_cmd))
        print("已发送 run-task 指令")

    def on_message(self, ws, message):
        """
    接收到消息时的回调函数
    区分文本和二进制消息处理
    """
        if isinstance(message, str):
            # 处理 JSON 文本消息
            try:
                msg_json = json.loads(message)
                print(f"收到 JSON 消息: {msg_json}")

                if "header" in msg_json:
                    header = msg_json["header"]

                    if "event" in header:
                        event = header["event"]

                        if event == "task-started":
                            print("任务已启动")
                            self.task_started = True

                            # 发送 continue-task 指令
                            texts = [
                                "床前明月光，疑是地上霜",
                                "举头望明月，低头思故乡"
                            ]

                            for text in texts:
                                self.send_continue_task(text)

                            # 所有 continue-task 发送完成后发送 finish-task
                            self.send_finish_task()

                        elif event == "task-finished":
                            print("任务已完成")
                            self.task_finished = True
                            self.close(ws)

                        elif event == "task-failed":
                            error_msg = msg_json.get("error_message", "未知错误")
                            print(f"任务失败: {error_msg}")
                            self.task_finished = True
                            self.close(ws)

            except json.JSONDecodeError as e:
                print(f"JSON 解析失败: {e}")
        else:
            # 处理二进制消息（音频数据）
            print(f"收到二进制消息，大小: {len(message)} 字节")
            with open(self.output_file, "ab") as f:
                f.write(message)
            print(f"已将音频数据写入本地文件{self.output_file}中")

    def on_error(self, ws, error):
        """发生错误时的回调"""
        print(f"WebSocket 出错: {error}")

    def on_close(self, ws, close_status_code, close_msg):
        """连接关闭时的回调"""
        print(f"WebSocket 已关闭: {close_msg} ({close_status_code})")

    def send_continue_task(self, text):
        """发送 continue-task 指令，附带要合成的文本内容"""
        cmd = {
            "header": {
                "action": "continue-task",
                "task_id": self.task_id,
                "streaming": "duplex"
            },
            "payload": {
                "input": {
                    "text": text
                }
            }
        }

        self.ws.send(json.dumps(cmd))
        print(f"已发送 continue-task 指令，文本内容: {text}")

    def send_finish_task(self):
        """发送 finish-task 指令，结束语音合成任务"""
        cmd = {
            "header": {
                "action": "finish-task",
                "task_id": self.task_id,
                "streaming": "duplex"
            },
            "payload": {
                "input": {}
            }
        }

        self.ws.send(json.dumps(cmd))
        print("已发送 finish-task 指令")

    def close(self, ws):
        """主动关闭连接"""
        if ws and ws.sock and ws.sock.connected:
            ws.close()
            print("已主动关闭连接")

    def run(self):
        """启动 WebSocket 客户端"""
        # 设置请求头部（鉴权）
        header = {
            "Authorization": f"bearer {self.api_key}",
            "X-DashScope-DataInspection": "enable"
        }

        # 创建 WebSocketApp 实例
        self.ws = websocket.WebSocketApp(
            self.uri,
            header=header,
            on_open=self.on_open,
            on_message=self.on_message,
            on_error=self.on_error,
            on_close=self.on_close
        )

        print("正在监听 WebSocket 消息...")
        self.ws.run_forever()  # 启动长连接监听


# 示例使用方式
if __name__ == "__main__":
    API_KEY = os.environ.get("DASHSCOPE_API_KEY")  # 如您未将API Key配置到环境变量，请将API_KEY 设置为您的 API Key
    SERVER_URI = "wss://dashscope.aliyuncs.com/api-ws/v1/inference/"  # 替换为你的 WebSocket 地址

    client = TTSClient(API_KEY, SERVER_URI)
    client.run()