WCF大数据文件

Question

我正在尝试从角度应用程序上传base64格式的图像文件。 该应用程序适用于较小的图像，但wcf对于大于200kb的图像给出了实体错误，误差太大。 我的webconfig文件是这样的。

<configuration>

  <appSettings>
    <add key="aspnet:UseTaskFriendlySynchronizationContext" value="true"/>
  </appSettings>
  <connectionStrings>
    <add name="ApplicationServices" connectionString="data source=LAPTOP-7JC2DRGE;Integrated Security=true;Initial Catalog=ExamDB" providerName="System.Data.SqlClient"/>
  </connectionStrings>
  <system.web>
    <compilation debug="true" targetFramework="4.6.1"/>
    <httpRuntime targetFramework="4.6.1" />
    <httpModules>
      <add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web"/>
    </httpModules>
    <membership>
      <providers>
        <clear />
        <add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="ApplicationServices" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/" />
      </providers>
    </membership>
    <roleManager enabled="true">
      <providers>
        <clear />
        <add connectionStringName="ApplicationServices" applicationName="/" name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" />
        <add applicationName="/" name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" />
      </providers>
    </roleManager>
  </system.web>
  <system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior name="serviceBehaviors">
          <!-- To avoid disclosing metadata information, set the values below to false before deployment -->
          <serviceMetadata httpGetEnabled="true" />
          <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
          <serviceDebug includeExceptionDetailInFaults="false"/>
        </behavior>
      </serviceBehaviors>
      <endpointBehaviors>
        <behavior name="web" >
          <webHttp />
        </behavior>
      </endpointBehaviors>
    </behaviors>
    <services>
      <service name="ExamService.ExamService" behaviorConfiguration="serviceBehaviors">
        <endpoint address="" contract="ExamService.IExamService" binding="webHttpBinding" behaviorConfiguration="web" ></endpoint>
      </service>
    </services>
    <protocolMapping>
      <add binding="basicHttpsBinding" scheme="https"  />
    </protocolMapping>
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true"/>
  </system.serviceModel>
  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true">
      <remove name="ApplicationInsightsWebTracking"/>
      <add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web"
        preCondition="managedHandler"/>
    </modules>
    <!--
        To browse web app root directory during debugging, set the value below to true.
        Set to false before deployment to avoid disclosing web app folder information.
      -->
    <directoryBrowse enabled="true"/>
    <validation validateIntegratedModeConfiguration="false"/>
  </system.webServer>

</configuration>

我在此网站上尝试过以前的答案，但似乎没有任何作用。 我正在使用框架4.6。

Answer 1

我怀疑您需要为webHttpBinding绑定添加一个绑定元素，并将maxReceivedMessageSize设置为较大值。 默认值为65536字节。

这需要在web.config的system.serviceModel节点中设置

下面是将XML设置为5MB的示例

<bindings>
  <webHttpBinding>
    <binding name="largeMessage" maxReceivedMessageSize="5000000" maxBufferPoolSize="5000000" maxBufferSize="5000000" closeTimeout="00:03:00" openTimeout="00:03:00" receiveTimeout="00:10:00" sendTimeout="00:03:00">
      <readerQuotas maxStringContentLength="5000000" maxArrayLength="5000000" maxBytesPerRead="5000000" />
      <security mode="None"/>
    </binding>
  </webHttpBinding>
</bindings>

您能否尝试更新服务节点以显式使用绑定配置（bindingConfiguration属性等于绑定名称属性）。 我认为这并不是真正需要的，因为只有一个绑定，但请尝试明确。

<services>
  <service name="ExamService.ExamService" behaviorConfiguration="serviceBehaviors">
    <endpoint address="" contract="ExamService.IExamService" binding="webHttpBinding" bindingConfiguration="largeMessage" behaviorConfiguration="web" ></endpoint>
  </service>
</services>

UPDATE

不知道这是怎么回事。 我做了一个快速的虚拟服务来复制该问题。

namespace LargeMessageService
{
    [ServiceContract]
    public interface ILobService
    {

        [OperationContract]
        [WebGet]
        string EchoWithGet(string s);

        [OperationContract]
        [WebInvoke]
        string EchoWithPost(string s);
    }

    public class LobService : ILobService
    {
        public string EchoWithGet(string s)
        {
            return "You said " + s;
        }

        public string EchoWithPost(string s)
        {
            return "You said " + s;
        }
    }
}

如您所见，当我有一个未定义绑定的配置时，它失败并显示413。 当我添加绑定时，它起作用了。 我完整的web.config绑定：

<appSettings>
  <add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />
</appSettings>
<system.web>
  <compilation debug="true" targetFramework="4.6.1" />
  <httpRuntime targetFramework="4.6.1"/>
</system.web>
<system.serviceModel>
  <behaviors>
    <serviceBehaviors>
      <behavior name="serviceBehaviors">
        <!-- To avoid disclosing metadata information, set the values below to false before deployment -->
        <serviceMetadata httpGetEnabled="true" />
        <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
        <serviceDebug includeExceptionDetailInFaults="true"/>
      </behavior>
    </serviceBehaviors>
    <endpointBehaviors>
      <behavior name="web" >
        <webHttp></webHttp>
      </behavior>
    </endpointBehaviors>
  </behaviors>
  <bindings>
    <webHttpBinding>
      <binding name="largeMessage" maxReceivedMessageSize="5000000" maxBufferPoolSize="5000000" maxBufferSize="5000000" closeTimeout="00:03:00" openTimeout="00:03:00" receiveTimeout="00:10:00" sendTimeout="00:03:00">
        <readerQuotas maxStringContentLength="5000000" maxArrayLength="5000000" maxBytesPerRead="5000000" />
        <security mode="None"/>
      </binding>
    </webHttpBinding>
  </bindings>
  <services>
    <service name="LargeMessageService.LobService" behaviorConfiguration="serviceBehaviors">
      <endpoint address="" contract="LargeMessageService.ILobService" binding="webHttpBinding" bindingConfiguration="largeMessage" behaviorConfiguration="web" ></endpoint>
      <endpoint contract="IMetadataExchange" binding="mexHttpBinding" address="mex" />
    </service>
  </services>
  <protocolMapping>
    <add binding="basicHttpsBinding" scheme="https"  />
  </protocolMapping>
  <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true"/>
</system.serviceModel>
<system.webServer>
  <modules runAllManagedModulesForAllRequests="true"/>
  <!--
      To browse web app root directory during debugging, set the value below to true.
      Set to false before deployment to avoid disclosing web app folder information.
    -->
  <directoryBrowse enabled="true"/>
</system.webServer>

我使用的是IISExpress，并通过带XML的EchoWithPost操作通过邮递员进行调用。

<string xmlns="http://schemas.microsoft.com/2003/10/Serialization/">Hello</string>

用大字符串替换“ Hello”（大约500K）

尝试使此功能正常运行，如果确实如此，则尝试找出此功能与您的功能之间的区别。 让我知道你是怎么办的。