学会WCF之试错法——超时
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
<system.serviceModel>
<services>
<service name="WCF_Find_Error_Lib.Service">
<endpoint address="" binding="basicHttpBinding" contract="WCF_Find_Error_Lib.IService">
<identity>
<dns value="localhost" />
</identity>
</endpoint>
<host>
<baseAddresses>
<add baseAddress="http://localhost/S" />
</baseAddresses>
</host>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior>
<serviceMetadata httpGetEnabled="True" httpsGetEnabled="True"/>
<serviceDebug includeExceptionDetailInFaults="False" />
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>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>, 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
<system.serviceModel>
<bindings>
<basicHttpBinding>
<binding name="BasicHttpBinding_IService" />
</basicHttpBinding>
</bindings>
<client>
<endpoint address="http://localhost/S" binding="basicHttpBinding"
bindingConfiguration="BasicHttpBinding_IService" contract="IService"
name="BasicHttpBinding_IService" />
</client>
</system.serviceModel>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。
<system.serviceModel>
<bindings>
<basicHttpBinding>
<binding name="BasicHttpBinding_IService" sendTimeout="00:10:00"/>
</basicHttpBinding>
</bindings>
<client>
<endpoint address="http://localhost/S" binding="basicHttpBinding"
bindingConfiguration="BasicHttpBinding_IService" contract="IService"
name="BasicHttpBinding_IService" />
</client>
</system.serviceModel>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
<netTcpBinding>
<binding name="NetTcpBinding_IService" maxBufferSize="270000" maxReceivedMessageSize="270000" transferMode="Buffered" receiveTimeout="00:00:10">
<readerQuotas maxStringContentLength="240000"/>
<reliableSession enabled="true" inactivityTimeout="00:00:10"/>
</binding>
</netTcpBinding>客户端配置
<netTcpBinding>
<binding name="NetTcpBinding_IService" sendTimeout="00:00:10" maxBufferSize="2700000" maxReceivedMessageSize="2700000" transferMode="Buffered" >
<readerQuotas maxStringContentLength="240000"/>
</binding>
</netTcpBinding>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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时间仓促，水平有限，如有不当之处，欢迎指正。