读取 XML 数据时超出了最大字符串内容长度配额 (8192)

Question

我正在尝试将一个大字符串（24,000 到 50,000 个字符）传递给自托管 TCP WCF 服务。

我已将 maxStringContentLength （各处）提高到 22008192。

我在某处读到我需要将绑定配置更改为“LargeBuffer”或“LongFields”，但是当我这样做时：

<endpoint address="" binding="netTcpBinding" bindingConfiguration="LongFields"
  contract="ExStreamWCF.IService1">

或这样：

<endpoint address="" binding="netTcpBinding" bindingConfiguration="LargeBuffer"
  contract="ExStreamWCF.IService1">

我的服务将无法启动。我真的需要这个错误消失。有什么想法吗？

谢谢，

Jason

PS——服务器上 tcp 服务的配置文件：

<system.serviceModel>
<services>
  <service behaviorConfiguration="ExStreamWCF.Service1Behavior"
    name="ExStreamWCF.Service1">
    <endpoint address="" binding="netTcpBinding" bindingConfiguration=""
      contract="ExStreamWCF.IService1">
      <identity>
        <dns value="Devexstream-2.anchorgeneral.local" />
        <!--<dns value="vmwin2k3sta-tn2" />-->
      </identity>
    </endpoint>
    <endpoint address="mex" binding="mexTcpBinding" bindingConfiguration=""
      contract="IMetadataExchange" />
    <host>
      <baseAddresses>
        <add baseAddress="net.tcp://Devexstream-2:8080/Service" />
        <!--<add baseAddress="net.tcp://vmwin2k3sta-tn2:8080/Service" />-->
      </baseAddresses>
    </host>
  </service>
</services>
<behaviors>
  <serviceBehaviors>
    <behavior name="ExStreamWCF.Service1Behavior">
      <serviceMetadata httpGetEnabled="false" />
      <serviceDebug includeExceptionDetailInFaults="true" />
    </behavior>
  </serviceBehaviors>
</behaviors>

编辑：根据请求进行绑定

    <system.serviceModel>
    <bindings>
<netTcpBinding>
<binding name="NetTcpBinding_IService1" closeTimeout="00:01:00"
 openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00"
 transactionFlow="false" transferMode="Buffered" transactionProtocol="OleTransactions"
 hostNameComparisonMode="StrongWildcard" listenBacklog="10" maxBufferPoolSize="524288"
 maxBufferSize="2565536" maxConnections="10" maxReceivedMessageSize="2565536">
 <readerQuotas maxDepth="22008192" maxStringContentLength="22008192" maxArrayLength="2516384"
  maxBytesPerRead="22008192" maxNameTableCharCount="22008192" />
 <reliableSession ordered="true" inactivityTimeout="00:10:00"
  enabled="false" />
 <security mode="Transport">
  <transport clientCredentialType="Windows" protectionLevel="EncryptAndSign" />
  <message clientCredentialType="Windows" />
 </security>
</binding>

</netTcpBinding>
</bindings>

客户端端点：

<client>
<endpoint address="net.tcp://devexstream-2:8080/Service" binding="netTcpBinding"
bindingConfiguration="NetTcpBinding_IService1" contract="TCPService.IService1"
         name="NetTcpBinding_IService1">
<identity>
 <servicePrincipalName value="TCPService\Devexstream-2" />
 <dns value="Devexstream-2.anchorgeneral.local" />
</identity>
</endpoint>

我已经编辑了该服务（如下），但现在该服务无法启动。新的应用程序配置：

<system.serviceModel>
<bindings>
  <netTcpBinding>
    <binding name="ExStreamWCFBinding" closeTimeout="00:00:05" openTimeout="00:00:05" receiveTimeout="00:00:05" sendTimeout="00:00:05" transferMode="Buffered" transactionProtocol="OleTransactions" hostNameComparison="StrongWildCard" maxBufferPoolSize="524288" maxBufferSize="524288" maxConnections="10" maxReceivedMessageSize="5242880">
      <readerQuotas maxDepth="32" maxStringContentLength="5242880" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" />
    </binding>
  </netTcpBinding>
</bindings>
<services>
  <service behaviorConfiguration="ExStreamWCF.Service1Behavior"
    name="ExStreamWCF.Service1">
    <endpoint address="" binding="netTcpBinding" bindingConfiguration="ExStreamWCFBinding"
      contract="ExStreamWCF.IService1">
      <identity>
        <dns value="Devexstream-2.anchorgeneral.local" />
        <!--<dns value="vmwin2k3sta-tn2" />-->
      </identity>
    </endpoint>
    <endpoint address="mex" binding="mexTcpBinding" bindingConfiguration=""
      contract="IMetadataExchange" />
    <host>
      <baseAddresses>
        <add baseAddress="net.tcp://Devexstream-2:8080/Service" />
        <!--<add baseAddress="net.tcp://vmwin2k3sta-tn2:8080/Service" />-->
      </baseAddresses>
    </host>
  </service>
</services>
<behaviors>
  <serviceBehaviors>
    <behavior name="ExStreamWCF.Service1Behavior">
      <serviceMetadata httpGetEnabled="false" />
      <serviceDebug includeExceptionDetailInFaults="true" />
    </behavior>
  </serviceBehaviors>
</behaviors>

Answer 1

bindingConfiguration 需要具有分配给 netTcpinding 元素的名称 - “LargeBuffer”或“LongFields”没有任何意义，除非配置文件中存在具有该名称的绑定元素。这就是为什么当你把它放进去时你的服务不会启动——我敢打赌，你很可能会收到某种配置错误消息。

要覆盖 maxStringContentLength 的默认 8192 设置，请执行以下操作：

1. 在配置文件中创建一个具有所需 maxStringContentLength 大小的 Binding 元素，并在 name 属性中为其指定名称。
2. 在端点元素中，将上面步骤 1 中的名称分配给属性 bindingConfiguration。

如果您没有为端点指定绑定配置，服务将使用默认值。

例如，以上面的配置文件为例。在标签下，添加以下绑定配置（请注意，您使用的具体值和可选属性将根据您的服务的需求而变化）：

<bindings>
  <netTcpBinding>
    <binding name="ExStreamWCFBinding" closeTimeout="00:00:05" openTimeout="00:00:05" receiveTimeout="00:00:05" sendTimeout="00:00:05" transferMode="Buffered" transactionProtocol="OleTransactions" hostNameComparison="StrongWildCard" maxBufferPoolSize="524288" maxBufferSize="524288" maxConnections="10" maxReceivedMessageSize="5242880">
      <readerQuotas maxDepth="32" maxStringContentLength="5242880" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" />
    </binding>
  </netTcpBinding>
</bindings>

然后在定义端点时：

<endpoint address="" binding="netTcpBinding" bindingConfiguration="ExStreamWCFBinding" contract="ExStreamWCF.IService1"> 

EDITED TO ADD

Baed根据您的附加信息，在服务中的端点上为绑定配置属性分配值“NetTcpBinding_IService1”。

Answer 2

有时将“maxStringContentLength”值更改为最大值可能没有帮助。因此，在服务器配置文件的“basicHttpBinding”部分中添加以下“默认”绑定。

          <binding >
            <readerQuotas maxDepth="32" maxStringContentLength="102400" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" /> 
          </binding>