学会WCF之试错法

2024-05-09 04:09| 来源: 网络整理| 查看: 265

服务契约

[ServiceContract] public interface IService { [OperationContract] string GetData(int value); [OperationContract] string GetString(string value); [OperationContract] void Upload(Request request); } [MessageContract] public class Request { [MessageHeader(MustUnderstand = true)] public string FileName { get; set; } [MessageBodyMember(Order = 1)] public Stream Content {get;set;} }

服务

[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall, ConcurrencyMode = ConcurrencyMode.Reentrant)] public class Service : IService { public string GetData(int value) { //Thread.Sleep(120000); return string.Format("You entered: {0}", value); } public string GetString(string value) { //Thread.Sleep(120000); return string.Format("You entered: {0}", value); } public void Upload(Request request) { try { StreamReader sr = new StreamReader(request.Content, Encoding.GetEncoding("GB2312")); StreamWriter sw = new StreamWriter("E:\\" + request.FileName + ".txt", false, Encoding.GetEncoding("GB2312")); while (!sr.EndOfStream) { sw.WriteLine(sr.ReadLine()); //Thread.Sleep(5000); } sr.Close(); sw.Close(); } catch (Exception ex) { } } }

服务配置

客户端代理

public class ServiceProxy { public string GetData(int value) { string ret = null; ServiceClient client = null; try { client = new ServiceClient(); ret = client.GetData(value); client.Close(); } catch { if (client != null) { client.Abort(); } throw; } return ret; } public string GetString(string value) { string ret = null; ServiceClient client = null; try { client = new ServiceClient(); ret = client.GetString(value); client.Close(); } catch { if (client != null) { client.Abort(); } throw; } return ret; } public void Upload(Request request) { ServiceClient client = null; try { client = new ServiceClient(); client.Upload(request); client.Close(); } catch { if (client != null) { client.Abort(); } throw; } } } [ServiceContractAttribute(ConfigurationName = "IService")] public interface IService { [System.ServiceModel.OperationContractAttribute(Action = "http://tempuri.org/IService/GetData", ReplyAction = "http://tempuri.org/IService/GetDataResponse")] string GetData(int value); [System.ServiceModel.OperationContractAttribute(Action = "http://tempuri.org/IService/GetString", ReplyAction = "http://tempuri.org/IService/GetStringResponse")] string GetString(string value); [System.ServiceModel.OperationContractAttribute(Action = "http://tempuri.org/IService/Upload", ReplyAction = "http://tempuri.org/IService/UploadResponse")] void Upload(Request request); } [MessageContract] public class Request { [MessageHeader(MustUnderstand = true)] public string FileName { get; set; } [MessageBodyMember(Order = 1)] public Stream Content { get; set; } } [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall, ConcurrencyMode = ConcurrencyMode.Reentrant)] public class ServiceClient : System.ServiceModel.ClientBase, IService { public ServiceClient() { } public string GetData(int value) { return base.Channel.GetData(value); } public string GetString(string value) { return base.Channel.GetString(value); } public void Upload(Request request) { base.Channel.Upload(request); } }

客户端配置

1 客户端调用超时

运行客户端，执行调用

ServiceProxy proxy = new ServiceProxy();

string s = proxy.GetData(1);

通过配置sendTimeout参数设定超时时间，超时时间默认为1分钟，上述配置中采用了默认超时时间。

Message

请求通道在等待 00:00:59.9469970 以后答复时超时。增加传递给请求调用的超时值，或者增加绑定上的 SendTimeout 值。分配给此操作的时间可能已经是更长超时的一部分。

Stacktrace:

Server stack trace:

在 System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout)

在 System.ServiceModel.Dispatcher.RequestChannelBinder.Request(Message message, TimeSpan timeout)

在 System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)

在 System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)

在 System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]:

在 System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)

在 System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)

在 Client.IService.GetData(Int32 value)

在 Client.ServiceClient.GetData(Int32 value) 位置 e:\projgxz_myself\WCF_Find_Error\Client\ServiceProxy.cs:行号 52

在 Client.ServiceProxy.GetData(Int32 value) 位置 e:\projgxz_myself\WCF_Find_Error\Client\ServiceProxy.cs:行号 19

在 Client.Program.Main(String[] args) 位置 e:\projgxz_myself\WCF_Find_Error\Client\Program.cs:行号 17

增大客户端调用超时时间，可解决超时问题

例如，超时时间设置为10分钟，满足此次调用需求。

2 非活动状态的最大时间间隔

通过配置receiveTimeout设定时间间隔，默认值为 10 分钟。

服务实例化模式改为为会话模式：

[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession, ConcurrencyMode = ConcurrencyMode.Reentrant)]

服务端配置

客户端配置

客户端调用

using (ServiceClient client = new ServiceClient()) { StreamReader sr = new StreamReader("D:\\CSBMTEMP.txt", Encoding.Default); string str = sr.ReadToEnd(); sr.Close(); client.GetString(str); Thread.Sleep(100000); client.GetString(str); }

运行客户端程序，成功捕获异常

上述异常中给出的错误信息并未指出具体的异常原因，所以从中很难推测是由于超时时间设置问题。遇到此类问题只能根据经验逐项排查，当然这是很浪费时间的，尤其是对于复杂的程序，更是如此。

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