Skip to main content
 首页 » 编程设计

c#之Web 服务仅针对某些请求返回 "Access is denied"

2024年01月16日39sharpest

我在 C# Web 应用程序中有一个 ASP.NET，它使用来自 Web 服务的数据。它在大多数情况下工作得很好，但有时，通常在请求更大的数据集时，它只返回一个访问被拒绝错误。

例如，如果我调用该服务以返回某个日期范围内的一些文档，并且范围足够小，它就可以正常工作。但是，如果我将范围扩展得太远，它会返回此错误。这让我相信这是一个大小或时间问题。

但是，如果我尝试返回所有文档，它几乎立即返回访问被拒绝错误，无需等待。

我很确定问题出在服务和应用程序之间，甚至出在应用程序的配置中。

任何人都可以帮助我发现为什么我会收到这个模糊的“访问被拒绝”错误吗？让我知道是否需要我提供更多信息。

编辑: 我控制网络服务。

我已经尝试通过一个小的 Windows 窗体应用程序调用该服务，但我从未见过任何错误。

我是通过某种契约(Contract)客户端调用网络服务吗？我不确定具体细节，但我只有一个指向该服务的服务引用，然后我可以声明一个客户端，然后使用其中的方法。

我可以在浏览器中正常访问该服务。

至于其他问题，我还不确定。我会进一步调查。

编辑 2: 这是客户端的配置:

<?xml version="1.0"?> 
<configuration> 
  <connectionStrings> 
    //omitted 
  </connectionStrings> 
  <system.web> 
    <httpRuntime executionTimeout="300" maxRequestLength="51200" /> 
<pages theme="Theme1" /> 
<compilation debug="true" targetFramework="4.0"> 
  <assemblies> 
    //omitted  
  </assemblies> 
</compilation> 
<authentication mode="Windows" /> 
<authorization> 
  <deny users="?" /> 
</authorization> 
<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> 
<profile> 
  <providers> 
    <clear /> 
    <add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/" /> 
  </providers> 
</profile> 
<roleManager enabled="false"> 
  <providers> 
    <clear /> 
    <add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="ApplicationServices" applicationName="/" /> 
    <add name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" applicationName="/" /> 
  </providers> 
</roleManager> 
<httpHandlers> 
    <add path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource" verb="*" validate="false" /> 
</httpHandlers> 
</system.web> 
<system.webServer> 
<modules runAllManagedModulesForAllRequests="true" /> 
<validation validateIntegratedModeConfiguration="false" /> 
<handlers> 
  <add name="Telerik_Web_UI_WebResource_axd" verb="*" preCondition="integratedMode" path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource" /> 
</handlers> 
</system.webServer> 
<appSettings> 
//omitted 
</appSettings> 
<system.serviceModel> 
    <bindings> 
        <basicHttpBinding> 
            <binding name="DefaultEndpoint" closeTimeout="00:09:00" openTimeout="00:09:00" receiveTimeout="00:10:00" sendTimeout="00:09:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferSize="2147483647" maxBufferPoolSize="2147483647" maxReceivedMessageSize="2147483647" messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true"> 
      <readerQuotas maxDepth="32" maxStringContentLength="2147483647" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" /> 
      <security mode="TransportCredentialOnly"> 
        <transport clientCredentialType="Ntlm" proxyCredentialType="None" realm="" /> 
        <message clientCredentialType="UserName" algorithmSuite="Default" /> 
      </security> 
    </binding> 
    <binding name="DefaultEndpoint1" closeTimeout="00:09:00" openTimeout="00:09:00" receiveTimeout="00:10:00" sendTimeout="00:09:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferSize="2147483647" maxBufferPoolSize="2147483647" maxReceivedMessageSize="2147483647" messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true"> 
      <readerQuotas maxDepth="32" maxStringContentLength="2147483647" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" /> 
      <security mode="TransportCredentialOnly"> 
        <transport clientCredentialType="Ntlm" proxyCredentialType="None" realm="" /> 
        <message clientCredentialType="UserName" algorithmSuite="Default" /> 
      </security> 
    </binding> 
  </basicHttpBinding> 
</bindings> 
<client> 
  <endpoint address="/*omitted*/ " binding="basicHttpBinding" behaviorConfiguration="ServiceBehavior" bindingConfiguration="DefaultEndpoint" contract="/*omitted*/ " name="DefaultEndpoint" /> 
  <endpoint address="/*omitted*/ " binding="basicHttpBinding" behaviorConfiguration="ServiceBehavior" bindingConfiguration="DefaultEndpoint1" contract="/*omitted*/ " name="DefaultEndpoint1" /> 
</client> 
<behaviors> 
  <endpointBehaviors> 
    <behavior name="ServiceBehavior"> 
      <dataContractSerializer maxItemsInObjectGraph="2147483647" /> 
    </behavior> 
  </endpointBehaviors> 
</behaviors> 
</system.serviceModel> 
</configuration>

这是服务的配置:

<?xml version="1.0"?> 
<configuration> 
  <configSections> 
    <sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=/*omitted*/" > 
        <section name="ITSLogger.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=/*omitted*/" requirePermission="false" /> 
    </sectionGroup> 
</configSections> 
<system.web> 
    <compilation debug="true" targetFramework="4.0" /> 
    <authentication mode="Windows"></authentication> 
    <!--<anonymousIdentification enabled="false"/>--> 
</system.web> 
<system.serviceModel> 
<services> 
  <service behaviorConfiguration="RWS.ServiceImplementation.ResearchService_Behavior" 
    name="RWS.ServiceImplementation.ResearchService"> 
    <endpoint address="" binding="basicHttpBinding" name="DefaultEndpoint" 
      bindingNamespace="http://researchwebservice.model/research" bindingConfiguration="userHttp" 
      contract="RWS.ServiceContracts.IResearchServiceContract"/> 
    <!--<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />--> 
  </service> 
</services> 
<bindings> 
  <basicHttpBinding> 
    <binding name="userHttp" 
             closeTimeout="00:01:00" 
             openTimeout="00:01:00" 
             receiveTimeout="00:10:00" 
             sendTimeout="00:01:00" 
             allowCookies="false" 
             bypassProxyOnLocal="false" 
             hostNameComparisonMode="StrongWildcard" 
             maxBufferSize="2147483647" 
             maxBufferPoolSize="2147483647" 
             maxReceivedMessageSize="2147483647" 
             messageEncoding="Text" 
             textEncoding="utf-8" 
             transferMode="Buffered" 
             useDefaultWebProxy="true"> 
      <readerQuotas maxDepth="2147483647" 
                    maxStringContentLength="2147483647" 
                    maxArrayLength="2147483647" 
                    maxBytesPerRead="2147483647" 
                    maxNameTableCharCount="2147483647" /> 
      <security mode="TransportCredentialOnly"> 
        <transport clientCredentialType="Ntlm" /> 
        <message clientCredentialType="UserName"/> 
      </security> 
    </binding> 
 
  </basicHttpBinding> 
</bindings> 
<behaviors> 
  <serviceBehaviors> 
    <behavior name=""> 
      <serviceMetadata httpGetEnabled="false" /> 
      <serviceDebug includeExceptionDetailInFaults="true" /> 
      <dataContractSerializer maxItemsInObjectGraph="2147483647"/> 
    </behavior> 
    <behavior name="RWS.ServiceImplementation.ResearchService_Behavior"> 
      <serviceDebug includeExceptionDetailInFaults="true" /> 
      <serviceMetadata httpGetEnabled="true" /> 
      <dataContractSerializer maxItemsInObjectGraph="2147483647"/> 
    </behavior> 
  </serviceBehaviors> 
</behaviors> 
</system.serviceModel> 
<system.webServer> 
  <modules runAllManagedModulesForAllRequests="true"/> 
</system.webServer> 
<connectionStrings> 
  <add name="ITSLogger.Properties.Settings.ITSLoggerConnectionString" 
        connectionString=/*omitted*/ 
        providerName="System.Data.SqlClient" /> 
</connectionStrings> 
 
<applicationSettings> 
  <ITSLogger.Properties.Settings> 
    <setting name="LogFilePath" serializeAs="String"> 
      <value>C:\ITSLogger\LoggerTest\</value> 
    </setting> 
    <setting name="MailServer" serializeAs="String"> 
    <value>/*omitted*/</value> 
  </setting> 
  <setting name="MailRecipient" serializeAs="String"> 
    <value>sklingbeil@itsmtc.com</value> 
  </setting> 
  <setting name="CanLogToEmail" serializeAs="String"> 
    <value>False</value> 
  </setting> 
  <setting name="CanLogToFlatFile" serializeAs="String"> 
    <value>False</value> 
  </setting> 
  <setting name="CanLogToTrace" serializeAs="String"> 
    <value>False</value> 
  </setting> 
  <setting name="CanLogToConsole" serializeAs="String"> 
    <value>False</value> 
  </setting> 
  <setting name="CanLogToEventLog" serializeAs="String"> 
    <value>true</value> 
  </setting> 
  <setting name="CanLogToDB" serializeAs="String"> 
    <value>False</value> 
  </setting> 
</ITSLogger.Properties.Settings> 
</applicationSettings> 
 
<system.diagnostics> 
<sources> 
  <source name="System.ServiceModel" 
                switchValue="Information, ActivityTracing" 
                propagateActivity="true"> 
    <listeners> 
      <add name="traceListener" 
          type="System.Diagnostics.XmlWriterTraceListener" 
          initializeData= "/*omitted*/" /> 
    </listeners> 
  </source> 
</sources> 
</system.diagnostics> 
 
</configuration>

我在这里和那里省略了一些我认为可能过于暴露的内容。

请您参考如下方法:

如果您可以从服务和客户端配置文件中发布您的配置部分，将会很有帮助。

请引用绑定(bind)的 maxReceivedMessageSize/MaxBufferSize/MaxBufferPoolSize 属性并尝试增加值。 http://msdn.microsoft.com/en-us/library/system.servicemodel.basichttpbinding.aspx

如果可能，打开 WCF 跟踪并验证请求和响应消息。


  文章来源：
  https://blog.windname.com/post/ajdgj2b1.html
阅读延展