ASP.NET 在中等信任中使用 Twitterizer答案

【问题标题】：ASP.NET Using Twitterizer in Medium TrustASP.NET 在中等信任中使用 Twitterizer
【发布时间】：2009-06-03 22:36:35
【问题描述】：

使用Twitterizer 框架的人是否有在中等信任环境中运行它的经验？我不断收到安全异常...

安全异常
说明：应用程序试图执行保安不允许的操作政策。授予此申请需要许可请联系您的系统管理员或更改应用程序的信任级别配置文件。

异常详情： System.Security.SecurityException：该组件不允许部分受信任的呼叫者。

【问题讨论】：

标签： asp.net medium-trust twitterizer

【解决方案1】：

我在 GoDaddy 上使用它，不得不寻找替代托管公司，折扣 asp.net...

我很确定 Twitterizer 的问题在于您需要能够进行反射工作，以便程序集识别哪些操作是可能的。中等信任度不允许反射工作。

【讨论】：

是的，我在 Godaddy 上……所以没办法吧？
stackoverflow.com/questions/805255/… Jon 的建议还不错，但没有与 GoDaddy 合作，这就是我搬家的真正原因......
除了具有相同易用性/功能的 twitterizer 之外，我还可以使用任何其他程序集吗？另外，是什么让某些东西在中等信任度下无法使用？
我知道有些人已经能够通过 JSON 纯粹在客户端使用 Twitter 提要。
我想做的就是每天在我的网站上发一篇文章。使用 twitterizer 非常简单......你还能想到其他方法吗？

【解决方案2】：

godaddy 没办法，看看他们在他们的网站上说了什么：

What Is Medium trust level and how does it affect my hosting account?

所以你只有两种方法：

更改 Twitterizer 信任模式。

或

检查另一家托管公司。

More about ASP.NET Trust Levels

【讨论】：

好的...那么这对我有什么影响？什么是中等信任阻止我使用 twitterizer？ twitterizer 需要什么？
如何更改 twitterizer 信任模式？
它的反射...中等信任不允许反射工作。
查看我在godaddy网站上发送的链接，您将详细了解中等信任度如何影响您的托管，但我不知道Twitterizer，我刚刚在另一个网站“KIGG”上遇到了同样的问题.
您可以从 web.config 进行更改，但我认为这不会解决问题，因为某些 Twitterizer 代码将需要完全或高信任级别，并且无法在 Medium 中运行。就我而言，它是 dotnetopenId 库和使用 ADO.net 实体框架的特殊代码

【解决方案3】：

我正在修改和测试 Twitterizer 以在中等信任下工作，并将在我的 GoDaddy 主机上进行测试。

如果您遇到具体问题，请不要犹豫，创建问题单或向我们的 Google 小组发送电子邮件。

-瑞奇（Twitterizer 库的所有者）

【讨论】：

实际上，我是在 google 群组中创建票证的人。我上次检查，你们真的修好了！
嗯，不知何故，它得到了 UNfixed。我已经对其进行了重新修复，对其进行了测试，并发布了使其在中等信任环境中工作所需的设置。具体来说，将其添加到内的 web.config 中：
在邮件列表上联系我，了解更多信息。我所看到的一切都表明它有效，所以我希望得到一些帮助。

【解决方案4】：

它适用于 godaddy.com 标准 Windows 帐户。更易读的来源是here。

Default.aspx:

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb"
         Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
          "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:TextBox ID="txtSendTweet" runat="server"
                     style="margin-bottom: 0px" Width="396px"></asp:TextBox>
        <br />
        <asp:Button ID="cmdSendTweet" runat="server" Text="Send Tweet" />

    </div>
    </form>
</body>
</html>

后面的代码：

Imports Twitterizer.Framework
Imports System.Configuration
Partial Class _Default
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim TwitterUserName As String = ConfigurationManager.AppSettings.Get("TwitterUserName")
        Dim TwitterPassWord As String = ConfigurationManager.AppSettings.Get("TwitterPassWord")

        Dim twit As Twitter = Nothing
        twit = New Twitter(TwitterUserName, TwitterPassWord, "Web")
        Dim followers As TwitterUserCollection = twit.User.Followers()

        For Each follower As TwitterUser In followers
            Response.Write(follower.ScreenName.ToString())
            Response.Write(follower.Status.Text.ToString())
            Response.Write(follower.NumberOfFollowers.ToString())
        Next
        Dim paras As New TwitterParameters()
        paras.Add(TwitterParameterNames.ScreenName, "Twit_er_izer")
        paras.Add(TwitterParameterNames.Since, Convert.ToDateTime("1/1/2009"))
        paras.Add(TwitterParameterNames.Page, 1)
        paras.Add(TwitterParameterNames.Count, 5)
        paras.Add(TwitterParameterNames.SinceID, 1)

        Dim usersStatus As TwitterStatusCollection = twit.Status.UserTimeline(paras)

        Response.Write("Other User")
        For Each status As TwitterStatus In usersStatus
            Response.Write(String.Format("User {0}: {1}", status.TwitterUser.ScreenName, status.Text))
            Response.Write("<br><p>")
        Next


    End Sub
    Protected Sub cmdSendTweet_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmdSendTweet.Click
        Dim TwitterUserName As String = ConfigurationManager.AppSettings.Get("TwitterUserName")
        Dim TwitterPassWord As String = ConfigurationManager.AppSettings.Get("TwitterPassWord")
        Dim TwitterMessage As String = txtSendTweet.Text
        Dim t As New Twitterizer.Framework.Twitter(TwitterUserName, TwitterPassWord)
        t.Status.Update(txtSendTweet.Text)
        Dispose()
    End Sub
End Class

Web.config:

<?xml version="1.0"?>
<!-- 
    Note: As an alternative to hand editing this file you can use the 
    web admin tool to configure settings for your application. Use
    the Website->Asp.Net Configuration option in Visual Studio.
    A full list of settings and comments can be found in 
    machine.config.comments usually located in 
    \Windows\Microsoft.Net\Framework\v2.x\Config 
-->
<configuration>
 <configSections>
  <sectionGroup name="system.web.extensions" type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
   <sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
    <section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
    <sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
     <section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="Everywhere"/>
     <section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
     <section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
     <section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" allowDefinition="MachineToApplication"/>
    </sectionGroup>
   </sectionGroup>
  </sectionGroup>
 </configSections>
 <appSettings>
  <add key="TwitterUserName" value="thesupermedia" />
  <add key="TwitterPassWord" value="yourpassword" />
 </appSettings>
 <connectionStrings/>
 <system.web>
  <!-- 
            Set compilation debug="true" to insert debugging 
            symbols into the compiled page. Because this 
            affects performance, set this value to true only 
            during development.

            Visual Basic options:
            Set strict="true" to disallow all data type conversions 
            where data loss can occur. 
            Set explicit="true" to force declaration of all variables.
        -->
  <authentication mode="Forms" />
  <customErrors defaultRedirect="" />
  <compilation debug="false" strict="false" explicit="true">
   <assemblies>
    <add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
    <add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
    <add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
    <add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
   </assemblies>
  </compilation>
  <pages>
   <namespaces>
    <clear/>
    <add namespace="System"/>
    <add namespace="System.Collections"/>
    <add namespace="System.Collections.Generic"/>
    <add namespace="System.Collections.Specialized"/>
    <add namespace="System.Configuration"/>
    <add namespace="System.Text"/>
    <add namespace="System.Text.RegularExpressions"/>
    <add namespace="System.Linq"/>
    <add namespace="System.Xml.Linq"/>
    <add namespace="System.Web"/>
    <add namespace="System.Web.Caching"/>
    <add namespace="System.Web.SessionState"/>
    <add namespace="System.Web.Security"/>
    <add namespace="System.Web.Profile"/>
    <add namespace="System.Web.UI"/>
    <add namespace="System.Web.UI.WebControls"/>
    <add namespace="System.Web.UI.WebControls.WebParts"/>
    <add namespace="System.Web.UI.HtmlControls"/>
   </namespaces>
   <controls>
    <add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
    <add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
   </controls>
  </pages>
  <!--
            The <authentication> section enables configuration 
            of the security authentication mode used by 
            ASP.NET to identify an incoming user. 
       <authentication mode="Windows"/>
        -->

  <!--
            The <customErrors> section enables configuration 
            of what to do if/when an unhandled error occurs 
            during the execution of a request. Specifically, 
            it enables developers to configure html error pages 
            to be displayed in place of a error stack trace.

        <customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">
            <error statusCode="403" redirect="NoAccess.htm" />
            <error statusCode="404" redirect="FileNotFound.htm" />
        </customErrors>
        -->
  <httpHandlers>
   <remove verb="*" path="*.asmx"/>
   <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
   <add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
   <add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false"/>
  </httpHandlers>
  <httpModules>
   <add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
  </httpModules>
 </system.web>
 <system.codedom>
  <compilers>
   <compiler language="c#;cs;csharp" extension=".cs" warningLevel="4" type="Microsoft.CSharp.CSharpCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
    <providerOption name="CompilerVersion" value="v3.5"/>
    <providerOption name="WarnAsError" value="false"/>
   </compiler>
   <compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" warningLevel="4" type="Microsoft.VisualBasic.VBCodeProvider, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
    <providerOption name="CompilerVersion" value="v3.5"/>
    <providerOption name="OptionInfer" value="true"/>
    <providerOption name="WarnAsError" value="false"/>
   </compiler>
  </compilers>
 </system.codedom>
 <!-- 
        The system.webServer section is required for running ASP.NET AJAX under Internet
        Information Services 7.0.  It is not necessary for previous version of IIS.
    -->
 <system.webServer>
  <validation validateIntegratedModeConfiguration="false"/>
  <modules>
   <remove name="ScriptModule"/>
   <add name="ScriptModule" preCondition="managedHandler" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
  </modules>
  <handlers>
   <remove name="WebServiceHandlerFactory-Integrated"/>
   <remove name="ScriptHandlerFactory"/>
   <remove name="ScriptHandlerFactoryAppServices"/>
   <remove name="ScriptResource"/>
   <add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
   <add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
   <add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
  </handlers>
 </system.webServer>
 <runtime>
  <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
   <dependentAssembly>
    <assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35"/>
    <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/>
   </dependentAssembly>
   <dependentAssembly>
    <assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35"/>
    <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/>
   </dependentAssembly>
  </assemblyBinding>
 </runtime>
</configuration>

【讨论】：