c# - WCF/wsHttpBinding/消息安全 - BadTokenRequest

Question

我正在使用一个较旧的 WCF 服务/客户端。向其添加了一个新的(静态)日志系统，实际上现在正在做一些负载测试。

现在遇到一些非常烦人的零星问题 - 声称“无法打开安全通道，因为与远程端点的安全协商失败”。我注意到我收到一个 CommunicationException，错误名称为 Sender，子代码为 BadContextToken。

奇怪的是，我会得到 2-4 个正确的响应，然后是一连串的异常，然后又开始得到好的响应。

这是我第一次真正涉足 WCF，到目前为止我并不喜欢它:)

服务 web.config:

<system.serviceModel>
  <bindings>
    <wsHttpBinding>
      <security mode="Message">
        <message clientCredentialType="UserName" />
      </security>
    </wsHttpBinding>
  </bindings>
  <services>
    <service behaviorConfiguration="ServiceBehavior" name="MyNamespace.MyService">
      <endpoint address="" binding="wsHttpBinding" contract="MyNamespace.IMyService" bindingConfiguration="wsMessage">
        <identity>
          <dns value="localhost" />
        </identity>
      </endpoint>
    </service>
  </services>
  <behaviors>
    <serviceBehaviors>
      <behavior name="ServiceBehavior">
        <serviceMetadata httpGetEnabled="false" />
        <serviceCredentials>
          <serviceCertificate findValue="MyValue" storeLocation="LocalMachine" storeName="My" x509FindType="FindBySubjectName" />
          <userNameAuthentication userNamePasswordValidationMode="Custom" customUserNamePasswordValidatorType="MyNamespace.UserNamePassValidator, MyNamespace" />
        </serviceCredentials>
      </behavior>
    </serviceBehaviors>
  </behaviors>
</system.serviceModel>

在客户端，客户端是这样实例化的:

var binding = new WSHttpBinding();
binding.Name = "WSHttpBinding_IMyService";
binding.Security.Mode = SecurityMode.Message;
binding.Security.Message.ClientCredentialType = MessageCredentialType.UserName;

var client = new MyService(binding, "http://myserver:8080/myapp/service.svc");

var endpointIdentity = new DnsEndpointIdentity("MyValue"); // Match the certificate name used by the server

client.Endpoint.Address = new EndpointAddress(new Uri("http://myserver:8080/myapp/service.svc"), endpointIdentity, client.Endpoint.Address.Headers);

var creds = client.ClientCredentials;

creds.ServiceCertificate.Authentication.CertificateValidationMode = X509CertificateValidationMode.None;
creds.UserName.UserName = "myuser";
creds.UserName.Password = "mypassword";

string retVal = client.SendRequest(); // SendRequest == one of the methods on my IMyService, returns a string.  This is also where I sporadically see my error when load testing.

如果有任何指示可以帮助我完成此 WCF 设置，我将不胜感激!

Answer 1

这些可能对您的 web.config 有用:

<behaviors> 
    <serviceBehaviors> 
        <behavior name="CalculatorServiceBehavior">
            <serviceDebug includeExceptionDetailInFaults="False" /> 
            <serviceMetadata httpGetEnabled="True"/> 
            <serviceThrottling maxConcurrentCalls="20" maxConcurrentInstances="100"/> 
        </behavior>
     </serviceBehaviors>
</behaviors>

<binding name="basicHttp" allowCookies="true" maxReceivedMessageSize="1048576" maxBufferSize="1048576" maxBufferPoolSize="1048576">
    <readerQuotas maxDepth="32" maxArrayLength="1048576" maxStringContentLength="1048576"/>
</binding>

通常这种“随机”行为可能取决于:

1. 超时(可能不是你的情况，因为你会得到不同的异常)
2. 连接太多:如果您的客户端打开太多连接(并且“忘记”关闭它们)，您将超过默认允许的最大值(取决于上下文，可能是 10 个连接)。 如果您更改 web.config，编辑 maxConcurrentCalls 和 maxConcurrentInstances
，您可以对此采取行动
3. 也许这些错误不是随机的，而是特定于某些消息；如果是这样，那可能是由于它的大小(即太大):再次更改您的 web.config 设置 maxReceivedMessageSize、maxBufferSize、maxBufferPoolSize 和 readerQuotas

当然，如果您打开WCF tracing，您将获得更多信息。 .