WCF+Restfull服务 提交或获取数据时数据大小限制问题解决方案

近日在使用wcf的restfull架构服务时遭遇到了提交大数据的问题。

    大数据包含两种情形：

    1）单条数据量过大。

    2）提交或获取的数据条数过多。

    在测试时发现，默认设置下当单条JSON数据大于30K时服务便不予受理。

    提交或获取数据大小的限制来自两方面，即IIS服务和WCF服务。

    这两方面的限制都可以通过配置WCF服务端的Web.config相关配置节点的方式解决。

    废话不说了，直接上解决方案。

• 未配置的原始Web.config 

<?xml version="1.0" encoding="utf-8"?>
<configuration>
<connectionStrings>
<add name="BaseConnectionString" connectionString="server=.\SQLEXPRESS;database=TLPBizF;uid=*******;pwd==*******;" providerName="System.Data.SqlClient" />
<add name="BizDBConnectionString" connectionString="server=.\SQLEXPRESS;database=TLPBizDB;uid==******;pwd==*******;" providerName="System.Data.SqlClient" />
</connectionStrings>
<appSettings>
<add key="TimeOutMinutes" value="20" />
<add key="BizDBName" value="TLPBizDB"/>
<add key="aspnet:MaxJsonDeserializerMembers" value="1500000000" />
</appSettings>
<system.web>
<compilation debug="true" targetFramework="4.0" />
</system.web>
<system.webServer>
<modules runAllManagedModulesForAllRequests="true" />
<handlers accessPolicy="Read, Execute, Script" />
<staticContent>
<mimeMap fileExtension=".svc" mimeType="application/octet-stream" />
</staticContent>
</system.webServer>
</configuration>

 

• 已配置的Web.config

<?xml version="1.0" encoding="utf-8"?>
<configuration>
<connectionStrings>
<add name="BaseConnectionString" connectionString="server=.\SQLEXPRESS;database=TLPBizF;uid=*******;pwd==*******;" providerName="System.Data.SqlClient" />
<add name="BizDBConnectionString" connectionString="server=.\SQLEXPRESS;database=TLPBizDB;uid==*******;;pwd==*******;" providerName="System.Data.SqlClient" />
</connectionStrings>
<appSettings>
<add key="TimeOutMinutes" value="20" />
<add key="BizDBName" value="TLPBizDB"/>
<add key="aspnet:MaxJsonDeserializerMembers" value="1500000000" />
</appSettings>
<system.web>
<compilation debug="true" targetFramework="4.0" />
<httpRuntime maxRequestLength="2147483644"/>
</system.web>
<system.web.extensions>
<scripting>
<webServices>
<jsonSerialization maxJsonLength="2147483644"/>
</webServices>
</scripting>
</system.web.extensions>
<system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior>
<serviceMetadata httpGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="false" />
<dataContractSerializer maxItemsInObjectGraph="2147483647"/>
</behavior>
<behavior name="BigDataServiceBehavior">
<serviceMetadata httpGetEnabled="true"/>
<serviceDebug includeExceptionDetailInFaults="false"/>
<dataContractSerializer maxItemsInObjectGraph="2147483647"/>
</behavior>
</serviceBehaviors>
</behaviors>
<serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
<standardEndpoints>
<webHttpEndpoint>
<!-- 服务节点配置 -->
<standardEndpoint name="BigDataServiceEndPoint"
transferMode="Buffered"
maxBufferSize="2147483647"
maxReceivedMessageSize="2147483647"
defaultOutgoingResponseFormat="Json"
helpEnabled="true"
automaticFormatSelectionEnabled="true">
<readerQuotas maxDepth="64"
maxNameTableCharCount="2147483647"
maxStringContentLength="2147483647"
maxBytesPerRead="2147483647"
maxArrayLength="2147483647"
></readerQuotas>
</standardEndpoint>
</webHttpEndpoint>
</standardEndpoints>
<services>
<!-- 服务对应配置 -->
<service name="SFiresoft.TLP.Services.BizCoreService" behaviorConfiguration="BigDataServiceBehavior">
<endpoint endpointConfiguration="BigDataServiceEndPoint"
kind="webHttpEndpoint"
contract="SFiresoft.TLP.Services.IBizCoreService"
>
</endpoint>
</service>
</services>
</system.serviceModel>
<system.webServer>
<modules runAllManagedModulesForAllRequests="true" />
<handlers accessPolicy="Read, Execute, Script" />
<staticContent>
<mimeMap fileExtension=".svc" mimeType="application/octet-stream" />
</staticContent>
</system.webServer>
</configuration>

对比：

1）system.web节点：  

<httpRuntime maxRequestLength="2147483644"/>

应对IIS服务请求数据大小限制的设置。

2）system.serviceModel节点下“webHttpEndpoint”的配置：

<standardEndpoint
name="MyPoint"
transferMode="Buffered"
maxBufferSize="2147483647"
maxReceivedMessageSize="2147483647"
defaultOutgoingResponseFormat="Json"
helpEnabled="false"
automaticFormatSelectionEnabled="true">
<readerQuotas
maxDepth="64"
maxNameTableCharCount="2147483647"
maxStringContentLength="2147483647"
maxBytesPerRead="2147483647"
maxArrayLength="2147483647"
></readerQuotas>
</standardEndpoint>

此处：

• name可以随意取。
• 数据大小设置部分不说了。
• helpEnabled属性：设置为true时则可以在服务URL后+/help的方式查看服务列表。

    　　如服务地址：http://localhost:9900/MapService.svc

    　　查看服务方式：http://localhost:9900/MapService.svc/help   

         如下图：

3）system.serviceModel节点下“service”的配置：

<services>
<service name="SFiresoft.TLP.Services.BizCoreService" behaviorConfiguration="Wcf4BigData.Web.BigDataServiceBehavior">
<endpoint endpointConfiguration="MyPoint" kind="webHttpEndpoint" contract="SFiresoft.TLP.Services.IBizCoreService">
</endpoint>
</service>
</services>    

• Service name设置同实现服务的类名一致。
• behaviorConfiguration 内容与behavior节点中的相应名称一致。
• 此处Endpoint节点中contract要和描述服务结构的接口名一致。