Wcf大数据文件

Question

我正试图从angular应用程序上传一个base64格式的图像文件。该应用程序对小图像运行良好，但对于大于200kb的图像，wcf给出的实体错误太大。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>

我在这个网站上试过以前的答案，但似乎都不起作用。我使用的是框架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设置为较大的值。默认值为65536字节。

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

下面是一个设置为5MB 的示例xml

<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>

能否尝试更新服务节点以明确使用绑定配置(bindingConfiguration属性等于bindingname属性)。我不认为这真的是必要的，因为只有一个绑定，但让我们试着明确一点。

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

更新

不确定这里发生了什么。我做了一个快速的虚拟服务来复制这个问题。

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;
}
}
}

当我有一个没有定义绑定的配置时，它失败了，出现了413，正如你所看到的。当我添加绑定时，它起作用了。我的完整web.config与绑定：

<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IISExpress，并通过Postman用xml调用EchoWithPost操作来调用它。

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

用大字符串(约500K)替换"Hello">

试着让这个发挥作用，如果真的起作用了，那就是试着找出这个和你的区别。让我知道你进展如何。