C# 调用讯飞实时语音转写

关于讯飞云平台申请appId的相关流程在我的另一篇文章java 调用科大讯飞语音听写和语音合成jdk有详细步骤，在此省略，直接上C#调用实时转写的接口代码

websocket调用讯飞接口类：

using IFlyCalc.entity;
using IFlyCalc.utils;
using IFlyCalc.view;
using System;
using System.Collections;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading;
using System.Threading.Tasks;
using WebSocketSharp;namespace IFlyCalc.net
{public class MyWebSocket{private WebSocket ws;private int connectState;//用于更新界面的委托public delegate bool UpdateRetDelegate(string text, bool beSentence);private UpdateRetDelegate updateRetDelegate;private bool beEnd;private string wsUrl = "ws://rtasr.xfyun.cn/v1/ws";private string appId = "*********";//此处请用自己申请的idprivate string apiKey = "*********";//此处请用自己申请的key//参数中的page是需要显示结果的页面对象public MyWebSocket(MyPage page){updateRetDelegate = new UpdateRetDelegate(page.UpdateVoiceResult);//可以放在配置文件中方便修改//wsUrl = ConfigUtil.IniReadValue("rtasr", "url");//appId = ConfigUtil.IniReadValue("rtasr", "appId");//apiKey = ConfigUtil.IniReadValue("rtasr", "apiKey");//System.Diagnostics.Debug.WriteLine("Read config success");}public void InitWebSocket(){try{if (wsUrl == null || wsUrl.Length == 0){System.Diagnostics.Debug.WriteLine("Read config wsUrl fail");return;}if (appId == null || appId.Length == 0){System.Diagnostics.Debug.WriteLine("Read config appId fail");return;}if (apiKey == null || apiKey.Length == 0){System.Diagnostics.Debug.WriteLine("Read config apiKey fail");return;}if (ws == null){string timeStamp = StringUtil.GetTimeStamp();string md5Code = EncryptUtil.GetMd5Code(appId + timeStamp);string hmacsha1Code = EncryptUtil.HMACSHA1Text(md5Code, apiKey);hmacsha1Code = StringUtil.UrlEncode(hmacsha1Code);ws = new WebSocket(wsUrl + "?appid=" + appId + "&ts=" + timeStamp + "&signa=" + hmacsha1Code + "&pd=edu",onClose: OnClose, onMessage: OnMessage, onOpen: OnOpen, onError: OnError);}beEnd = false;if (connectState == 1){return;}connectState = -1;while (true){if (connectState == 0){Thread.Sleep(50);continue;}else if (connectState == 1){System.Diagnostics.Debug.WriteLine("MyWebSocket connect success");return;}System.Diagnostics.Debug.WriteLine("MyWebSocket Connect");if (ws == null){string timeStamp = StringUtil.GetTimeStamp();string md5Code = EncryptUtil.GetMd5Code(appId + timeStamp);string hmacsha1Code = EncryptUtil.HMACSHA1Text(md5Code, apiKey);hmacsha1Code = StringUtil.UrlEncode(hmacsha1Code);ws = new WebSocket(wsUrl + "?appid=" + appId + "&ts=" + timeStamp + "&signa=" + hmacsha1Code + "&pd=edu",onClose: OnClose, onMessage: OnMessage, onOpen: OnOpen, onError: OnError);}ws.Connect();connectState = 0;if (connectState == -1){closeWebsocket();}else if (connectState == 1){System.Diagnostics.Debug.WriteLine("MyWebSocket connect success");return;}}} catch (Exception ex){System.Diagnostics.Debug.WriteLine("InitWebSocket exception:" + ex.Message);}}public void SendByteMsg(byte[] byteMsg){if (ws != null && ws.ReadyState == WebSocketState.Open){System.Diagnostics.Debug.WriteLine("MyWebSocket SendByteMsg");ws.Send(byteMsg);}}public void SendStrMsg(string strMsg){if (ws != null && ws.ReadyState == WebSocketState.Open){System.Diagnostics.Debug.WriteLine("MyWebSocket SendStrMsg");ws.Send(strMsg);beEnd = true;}}public void closeWebsocket(){ws.Close();ws.Dispose();ws = null;connectState = -1;}private Task OnOpen(){System.Diagnostics.Debug.WriteLine("MyWebSocket is opened");return null;}private Task OnClose(CloseEventArgs arg){System.Diagnostics.Debug.WriteLine("MyWebSocket is closed");connectState = -1;return null;}private Task OnMessage(MessageEventArgs args){StringBuilder sb = new StringBuilder();string type = "0";try{string content = args.Text.ReadToEnd();System.Diagnostics.Debug.WriteLine("MyWebSocket receive msg=" + content);IflyRet iflyRet = StringUtil.ParseIflyRet(content);if (iflyRet.code == "0" && iflyRet.data != null && iflyRet.data.Length > 0){RtaData rta = StringUtil.ParseRtaData(iflyRet.data);if (rta != null && rta.cn != null && rta.cn.st != null && rta.cn.st.rt != null && rta.cn.st.rt.Count > 0){type = rta.cn.st.type;WordsList wss = rta.cn.st.rt[0];if (wss != null && wss.ws != null && wss.ws.Count > 0){for (int i = 0; i < wss.ws.Count; i++){Words ws = wss.ws[i];if (ws != null && ws.cw != null && ws.cw.Count > 0){Word word = ws.cw[0];if (word != null && word.wp != "p"){sb.Append(word.w);}}}}}}else if (iflyRet.code == "0"){connectState = 1;}else{connectState = -1;}} catch (Exception ex){System.Diagnostics.Debug.WriteLine("Parse jsonStr exception:" + ex.Message);}string regStr = sb.ToString();if (regStr.Length > 0){System.Diagnostics.Debug.WriteLine("Parse jsonStr centense=" + regStr);//更新UI    (regStr, type);updateRetDelegate(regStr, type == "0");}if (beEnd){closeWebsocket();}return null;}private Task OnError(ErrorEventArgs e){System.Diagnostics.Debug.WriteLine("MyWebSocket get error:" + e.Message);closeWebsocket();return null;}}
}

其中包含的相关工具类：

StringUtil类：

using IFlyCalc.entity;
using Newtonsoft.Json;
using System;
using System.IO;
using System.Text;namespace IFlyCalc.utils
{public class StringUtil{/// <summary>/// 字节数组转16进制字符串/// </summary>/// <param name="bytes"></param>/// <returns></returns>public static string byteToHexStr(byte[] bytes){string returnStr = "";if (bytes != null){for (int i = 0; i < bytes.Length; i++){returnStr += bytes[i].ToString("X2");}}return returnStr;}/// <summary>/// 获取时间戳/// </summary>/// <returns></returns>public static string GetTimeStamp(){TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);return Convert.ToInt64(ts.TotalSeconds).ToString();}public static RtaData ParseRtaData(string text){try{//StreamReader sr1 = new StreamReader("E:\\code\\jsonData.txt", Encoding.Default);//string jsonStr = sr1.ReadToEnd();StringReader sr = new StringReader(text);JsonSerializer serializer = new JsonSerializer();RtaData rta = (RtaData)serializer.Deserialize(new JsonTextReader(sr), typeof(RtaData));return rta;} catch (Exception ex){System.Diagnostics.Debug.WriteLine("testJson exception:" + ex.Message);}return null;}public static IflyRet ParseIflyRet(string text){try{StringReader sr = new StringReader(text);JsonSerializer serializer = new JsonSerializer();IflyRet iflyRet = (IflyRet)serializer.Deserialize(new JsonTextReader(sr), typeof(IflyRet));return iflyRet;}catch (Exception ex){System.Diagnostics.Debug.WriteLine("testJson exception:" + ex.Message);}return null;}public static string UrlEncode(string str){StringBuilder sb = new StringBuilder();byte[] byStr = System.Text.Encoding.UTF8.GetBytes(str); //默认是System.Text.Encoding.Default.GetBytes(str)for (int i = 0; i < byStr.Length; i++){sb.Append(@"%" + Convert.ToString(byStr[i], 16));}return (sb.ToString());}}
}

EncryptUtil类：

using System;
using System.Security.Cryptography;
using System.Text;namespace IFlyCalc.utils
{public class EncryptUtil{public static string GetMd5Code(string text){try{//MD5类是抽象类MD5 md5 = MD5.Create();//需要将字符串转成字节数组byte[] buffer = Encoding.Default.GetBytes(text);//加密后是一个字节类型的数组，这里要注意编码UTF8/Unicode等的选择byte[] md5buffer = md5.ComputeHash(buffer);string str = null;// 通过使用循环，将字节类型的数组转换为字符串，此字符串是常规字符格式化所得foreach (byte b in md5buffer){//得到的字符串使用十六进制类型格式。格式后的字符是小写的字母，如果使用大写（X）则格式后的字符是大写字符 //但是在和对方测试过程中，发现我这边的MD5加密编码，经常出现少一位或几位的问题；//后来分析发现是 字符串格式符的问题， X 表示大写， x 表示小写， //X2和x2表示不省略首位为0的十六进制数字；str += b.ToString("x2");}Console.WriteLine(str);//202cb962ac59075b964b07152d234b70return str;} catch (Exception e){System.Diagnostics.Debug.WriteLine("GetMd5Code exception:" + e.Message);}return null;}#region HMACSHA1加密  对二进制数据转Base64后再返回/// <summary>/// HMACSHA1加密/// </summary>/// <param name="text">要加密的原串</param>///<param name="key">私钥</param>/// <returns></returns>public static string HMACSHA1Text(string text, string key){try{//HMACSHA1加密HMACSHA1 hmacsha1 = new HMACSHA1{Key = System.Text.Encoding.UTF8.GetBytes(key)};byte[] dataBuffer = System.Text.Encoding.UTF8.GetBytes(text);byte[] hashBytes = hmacsha1.ComputeHash(dataBuffer);return Convert.ToBase64String(hashBytes);} catch (Exception e){System.Diagnostics.Debug.WriteLine("HMACSHA1Text exception:" + e.Message);}return null;}#endregion}
}

调用MyWebsocket的地方

//按照讯飞文档的要求，从保存的音频数据中每隔40毫秒读取1280byte发送出去
//myWebSocket需要在前面new一个，并且把页面对象带过去，如下
//myWebSocket = new MyWebSocket(page);
private void SendAudioDataToSocket()
{try{while (true){//byteSource是保存麦克风读取到的音频数据if (byteSource == null || byteSource.Count == 0){Thread.Sleep(100);continue;}System.Diagnostics.Debug.WriteLine("byteSource length = " + byteSource.Count);sendIndex++;int remainLen = byteSource.Count - sendIndex * 1280;if (remainLen >= 0){if (sendIndex == 1){myWebSocket.InitWebSocket();}myWebSocket.SendByteMsg(byteSource.GetRange((sendIndex - 1) * 1280, 1280).ToArray());Thread.Sleep(40);if (remainLen == 0){System.Diagnostics.Debug.WriteLine("Send last Audio Data");myWebSocket.SendStrMsg("{\"end\": true}");byteSource.Clear();sendIndex = 0;System.Diagnostics.Debug.WriteLine("Send Audio Data over");}}else{System.Diagnostics.Debug.WriteLine("Send last Audio Data");remainLen = byteSource.Count - (sendIndex - 1) * 1280;myWebSocket.SendByteMsg(byteSource.GetRange((sendIndex - 1) * 1280, remainLen).ToArray());Thread.Sleep(40);//发送结束标志myWebSocket.SendStrMsg("{\"end\": true}");byteSource.Clear();sendIndex = 0;System.Diagnostics.Debug.WriteLine("Send Audio Data over");}}//System.Diagnostics.Debug.WriteLine("byteSource is null, should not send");} catch (Exception ex){System.Diagnostics.Debug.WriteLine("SendAudioDataThread exception:" + ex.Message);}
}

如有不合适的地方，还请多多指正，也希望能帮到大家，^_^

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