一、新建项目，定义GRPC服务接口
vs新建dll项目，项目中NuGet程序包添加Grpc相关引用
定义服务，创建.proto文件
创建文件CorrespondService.proto
syntax = "proto3";
package My.Public;
service CorrespondGrpcService {
rpc SendMsg(GrpcData) returns (GrpcResult);
rpc ReceiveDataFromServer(GrpcData) returns (stream GrpcData);
}
message GrpcData {
string Ip = 1;
int32 Port = 2;
string DataId = 3;
int32 DataPriority = 4;
string DataType = 5;
string Conntent = 6;
string NodeName = 7;
}
message GrpcResult{
bool result = 1;
}定义两个服务方法：
客户端发送数据到服务端：SendMsg
服务端发送数据到客户端(从服务端接收数据)：ReceiveDataFromServer，因为是服务端主动触发，所以从服务端的返回数据定义成stream形式，流式传输，客户端启动一次该方法，即可等待服务端流式数据发送到客户端。
二、生成代码，添加到项目中
在添加的引用package下找到Grpc.Tool下的文件\tools\windows_x64
使用文件夹中的工具生成文件，到packages的上一层目录框输入cmd回车打开命令提示符窗口
运行命令：packages\Grpc.Tools.2.24.0\tools\windows_x64\protoc.exe -ISystemPublic --csharp_out SystemPublic SystemPublic\PublicClass\Grpc\GrpcService\CorrespondService.proto --grpc_out SystemPublic --plugin=protoc-gen-grpc=packages\Grpc.Tools.2.24.0\tools\windows_x64\grpc_csharp_plugin.exe
注意自己引用包的版本号和目录路径。
生成文件后拷贝到相应的目录下，添加到项目中。
三、 服务接口实现：
创建通信服务类CorrespondServiceServer.cs继承CorrespondGrpcService.CorrespondGrpcServiceBase，并实现定义的方法：
/// <summary>
/// Grpc服务
/// </summary>
public class CorrespondServiceServer : CorrespondGrpcService.CorrespondGrpcServiceBase
{
public ConcurrentDictionary<string, TaskInfo> _receiveDataTaskId = new ConcurrentDictionary<string, TaskInfo>();
public Func<GrpcData, GrpcResult> MessageHandler { get; set; } = null;
public override Task<GrpcResult> SendMsg(GrpcData request, ServerCallContext context)
{
if (MessageHandler == null)
{
return Task.FromResult<GrpcResult>(new GrpcResult() { Result = false });
}
Tuple<string, int> clientIP = SplitKeyStrGrpcContextPeer(context.Peer);
if (string.IsNullOrEmpty(request.Ip))
{
request.Ip = clientIP.Item1;
request.Port = clientIP.Item2;
}
GrpcResult result = MessageHandler(request);
return Task.FromResult<GrpcResult>(result);
}
public override Task ReceiveDataFromServer(GrpcData request, IServerStreamWriter<GrpcData> responseStream, ServerCallContext context)
{
Tuple<string, int> clientIP = SplitKeyStrGrpcContextPeer(context.Peer);
string IPkeyStr = GetKeyStr(clientIP.Item1, clientIP.Item2);
if (_receiveDataTaskId.ContainsKey(IPkeyStr))
{
// 线程未完成
if (_receiveDataTaskId[IPkeyStr].IsStarted)
{
bool res = _receiveDataTaskId[IPkeyStr].Stop();
}
TaskInfo tmp;
_receiveDataTaskId.TryRemove(IPkeyStr, out tmp);
}
if (!DataQueues.SendDataQueue.ContainsKey(IPkeyStr))
{
DataQueues.SendDataQueue[IPkeyStr] = new QueueInfo<GrpcData>();
}
DataQueues.SendDataQueue[IPkeyStr].Clear();
if (string.IsNullOrEmpty(request.Ip))
{
request.Ip = clientIP.Item1;
request.Port = clientIP.Item2;
}
TaskInfo tInfo = new TaskInfo(request, responseStream, context, DataQueues.SendDataQueue[IPkeyStr]);
bool result = tInfo.Start();
_receiveDataTaskId[IPkeyStr] = tInfo;
return tInfo.GetTask();
}
private string GetKeyStr(string ip, int port)
{
return string.Format("{0}:{1}", ip, port.ToString());
}
private Tuple<string, int> SplitKeyStr(string strKey)
{
Tuple<string, int> tuple = new Tuple<string, int>("", 0);
string[] res = strKey.Split(':');
if (res.Length != 2)
{
return tuple;
}
int port;
if (!int.TryParse(res[1], out port))
{
return tuple;
}
tuple = new Tuple<string, int>(res[0], port);
return tuple;
}
private Tuple<string, int> SplitKeyStrGrpcContextPeer(string strKey)
{
Tuple<string, int> tuple = new Tuple<string, int>("", 0);
string[] res = strKey.Split(':');
if (res.Length < 2)
{
return tuple;
}
int lenth = res.Length;
int port;
if (!int.TryParse(res[lenth - 1], out port))
{
return tuple;
}
tuple = new Tuple<string, int>(res[lenth - 2], port);
return tuple;
}
}ReceiveDataFromServer方法只需要被客户端启动一次。
队列DataQueues：
public class DataQueues
{
public static ConcurrentDictionary<string, QueueInfo<GrpcData>> SendDataQueue = new ConcurrentDictionary<string, QueueInfo<GrpcData>>();
public static ConcurrentDictionary<int, string> ServerDatas = new ConcurrentDictionary<int, string>();
}数据任务异步处理TaskInfo：
public class TaskInfo
{
private Task _tk = null;
private bool _isStarted = false;
private GrpcData _request = null;
private IServerStreamWriter<GrpcData> _writerStream = null;
private ServerCallContext _context = null;
private QueueInfo<GrpcData> _resDataQueue = null;
private CancellationTokenSource _cacelTokenSource = new CancellationTokenSource();
public TaskInfo(GrpcData request, IServerStreamWriter<GrpcData> responseStream, ServerCallContext context, QueueInfo<GrpcData> resDataQueue)
{
_request = request;
_writerStream = responseStream;
_context = context;
_resDataQueue = resDataQueue;
}
public bool IsStarted
{
get
{
if (_tk == null)
{
_isStarted = false;
}
else if (_tk.IsCompleted)
{
_isStarted = false;
_tk.Dispose();
_tk = null;
}
else
{
_isStarted = true;
}
return _isStarted;
}
}
public Task GetTask()
{
return _tk;
}
public bool Start()
{
try
{
if (IsStarted)
{
return true;
}
_isStarted = true;
_tk = Task.Factory.StartNew(DataWriteThead);
return true;
}
catch (Exception ex)
{
return false;
}
}
public bool Stop()
{
try
{
if (IsStarted)
{
_isStarted = false;
if (_resDataQueue == null)
{
return false;
}
_resDataQueue.QueueResetEvent.Set();
}
_isStarted = false;
_cacelTokenSource.Cancel();
return true;
}
catch (Exception ex)
{
return false;
}
}
private void DataWriteThead()
{
if (_writerStream == null || _request == null || _context == null || _resDataQueue == null)
{
return;
}
while (_isStarted && !_context.CancellationToken.IsCancellationRequested && !_cacelTokenSource.IsCancellationRequested)
{
try
{
if (_resDataQueue.IsEmpty)
{
_resDataQueue.QueueResetEvent.WaitOne();
}
GrpcData data;
if (_resDataQueue.TryPeek(out data))
{
// 向客户端发送数据
Task wTask = _writerStream.WriteAsync(data);
wTask.Wait(5000, _cacelTokenSource.Token);
if (!wTask.IsCanceled && !wTask.IsFaulted)
{
_resDataQueue.TryDequeue(out data);
}
}
}
catch (Exception ex)
{
}
}
}
}四、服务端启动
private Grpc.Core.Server _pServer = null;
CorrespondServiceServer csServer = null;
public bool Start()
{
try
{
if (_pServer == null)
{
csServer = new CorrespondServiceServer();
csServer.MessageHandler = ServerReceiveData;
_pServer = new Grpc.Core.Server
{
Services = { CorrespondGrpcService.BindService(csServer) },
Ports = { new ServerPort(IP, Port, ServerCredentials.Insecure) }
};
_pServer.Start();
}
IsStarted = true;
return IsStarted;
}
catch (Exception ex)
{
return false;
}
}
public bool Stop()
{
try
{
if (!IsStarted)
{
return true;
}
if (_pServer != null)
{
_pServer.ShutdownAsync();
_pServer = null;
}
IsStarted = false;
return true;
}
catch (Exception ex)
{
return false;
}
}
//服务端向客户端发送消息，把消息加入队列进行处理
public bool SendMsg(string ip, int port, GrpcData msg)
{
string strKey = GetKeyStr(ip.Trim(), port);
TaskInfo tk = null;
if (csServer._receiveDataTaskId.ContainsKey(strKey))
{
tk = csServer._receiveDataTaskId[strKey];
if (tk == null || !tk.IsStarted)
{
return false;
}
DataQueues.SendDataQueue[IpPortStrKey].Enqueue(msg);
return true;
}
else
{
return false;
}
}
/// <summary>
/// 收到client调用SendMsg传来的数据，Grpc的Server可以直接响应返回，不需要再给指定Ip端口发送返回数据
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
private GrpcResult ServerReceiveData(GrpcData data)
{
Task tk = new Task(() => { ProcessData(data, data.Ip, data.Port); });
tk.Start();
return new GrpcResult() { Result = true };
}五、客户端连接
Channel channel = null;
CorrespondGrpcService.CorrespondGrpcServiceClient csClient = null;
private CancellationTokenSource _receiveCancelSource = new CancellationTokenSource();
public bool Connect(string ip, int port)
{
try
{
if (IsStarted)
{
return true;
}
IsStarted = true;
RemoteIp = ip;
RemotePort = port;
if (channel == null)
{
channel = new Channel(ip, port, ChannelCredentials.Insecure);
csClient = new CorrespondGrpcService.CorrespondGrpcServiceClient(channel);
}
if (_guardThread == null)
{
_guardThread = new Thread(new ThreadStart(GuardThread));
_guardThread.IsBackground = true;
_guardThread.Name = "CorrespondServiceClientGuard";
_guardThread.Start();
}
_guardThreadEvent.Set();
}
catch (Exception ex)
{
IsStarted = false;
}
return IsStarted;
}
public bool DisConnect()
{
if (!IsStarted)
{
return true;
}
IsStarted = false;
_guardThreadEvent.Set();
try
{
_sendCancelSource.Cancel();
_receiveCancelSource.Cancel();
if (channel != null)
{
channel.ShutdownAsync();
channel = null;
}
}
catch (Exception ex)
{
return false;
}
return true;
}
private void GuardThread()
{
while (true)
{
if (!IsStarted)
{
_guardThreadEvent.WaitOne();
}
try
{
// 检查接收数据通道
CheckReceiveChn();
}
catch (Exception ex)
{
}
Thread.Sleep(6 * 1000);
}
}
#region 客户端接收数据处理
private Task receiveTask = null;
private void CheckReceiveChn()
{
if (channel == null || csClient == null)
{
return;
}
if (channel.State == ChannelState.Ready)
{
if (receiveTask == null || receiveTask.IsCompleted)
{
GrpcData cdata = new GrpcData();
AsyncServerStreamingCall<GrpcData> callback = csClient.ReceiveDataFromServer(cdata,
cancellationToken: _receiveCancelSource.Token);
receiveTask = Task.Factory.StartNew(() => { ReceivedData(callback, _receiveCancelSource.Token); });
}
return;
}
if (channel.State == ChannelState.Connecting)
{
return;
}
try
{
_receiveCancelSource.Cancel();
if (channel.State == ChannelState.TransientFailure)
{
channel.ShutdownAsync().Wait();
channel = new Channel(RemoteIp, RemotePort, ChannelCredentials.Insecure);
csClient = new CorrespondGrpcService.CorrespondGrpcServiceClient(channel);
}
_receiveCancelSource = new CancellationTokenSource();
bool res = channel.ConnectAsync().Wait(3000);
}
catch (TaskCanceledException)
{
// 取消线程，不需要记录日志
return;
}
catch (Exception ex)
{
return;
}
}
private void ReceivedData(AsyncServerStreamingCall<GrpcData> callback, CancellationToken token)
{
try
{
while (!token.IsCancellationRequested && channel != null && channel.State == ChannelState.Ready
&& callback.ResponseStream.MoveNext().Result)
{
Task tk = new Task(() => { HandleData(callback.ResponseStream.Current); }, _receiveCancelSource.Token);
tk.Start();
}
}
catch (Exception)
{
}
}
private void HandleData(GrpcData Data)
{
Task tk = new Task(() => { ProcessData(Data); });
tk.Start();
}
#endregion
//客户端向服务端发送数据
public bool SendMsg(GrpcData Data)
{
if (channel == null || csClient == null)
{
return false;
}
// 消息发送加锁， 避免消息粘包
lock (_msgSendLock)
{
if (channel.State != ChannelState.Ready)
{
return false;
}
try
{
GrpcResult resData = csClient.SendMsg(Data);
if (!resData.Result)
{
return false;
}
}
catch (Exception ex)
{
return false;
}
}
return true;
}客户端启动Connect连接服务端后，创建了数据接收检查通道线程，在连接Ready后receiveTask 为null时，调用一次服务接口方法ReceiveDataFromServer使用回调接收服务端传来的数据ReceivedData。
客户端调用服务端ReceiveDataFromServer时，服务端创建了该客户端的Ip Port为key的任务TaskInfo来处理服务端后续传输给客户端的数据。当队列有数据时，通过服务接口的流传输_writerStream.WriteAsync(data);将数据发送给客户端，客户端利用回调方法接收到后进行处理。
客户端给服务端发送数据：调用客户端的SendMsg(GrpcData Data)发送数据，服务端接收到数据后传给Func方法ServerReceiveData进行下一步处理。
服务端给客户端发送数据：调用服务端的SendMsg(string ip, int port, GrpcData msg)方法，查看已连接客户端的Ip:Port的TaskInfo，将数据添加至相应队列。
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