WebRequest 来自 SQL CLR 错误

Question

更新：
感谢 j.v. 的回答，我能够运行这个，但现在我看到很多快速连续的错误：

    A first chance exception of type 'System.Security.SecurityException' occurred in mscorlib.dll
    A first chance exception of type 'System.Security.SecurityException' occurred in mscorlib.dll
    A first chance exception of type 'System.Security.SecurityException' occurred in mscorlib.dll
    A first chance exception of type 'System.Security.SecurityException' occurred in mscorlib.dll
(plus about 20-30 more after this)

搜索此内容时，我看到许多 "first chance exceptions" 通常可以忽略的评论。在这种情况下这是正确的吗？

此外，有人可以解释为什么我会看到这些错误消息吗？是否有解决方法？

OP:

我创建了一个 WCF REST 服务，它在从 Web 浏览器调用时可以正常工作：

我现在正在创建一个 SQL CLR 来使用 REST 服务。这是 SQL CLR 的代码：

public partial class UserDefinedFunctions
{
    public enum HttpMethods { POST, PUT, GET, DELETE };


    /// <summary>
    /// Test Method
    /// </summary>
    /// <param name="name"></param>
    /// <returns></returns>
    [Microsoft.SqlServer.Server.SqlFunction(DataAccess = DataAccessKind.Read)]
    public static SqlString ExecFoxPro_SayHello(String name)
    {
        // Put your code here
        return new SqlString ("*** Hello, " + name + "!");
    }


    /// <summary>
    /// Return the allowed paths the FoxProConnectWS is configured for
    /// </summary>
    /// <param name="WebServiceUri"></param>
    /// <returns></returns>
    [Microsoft.SqlServer.Server.SqlFunction(DataAccess = DataAccessKind.Read)]
    public static SqlString GetAllowedPaths(SqlString serviceUrl)
    {
        String _url = serviceUrl.ToString() + @"/AllowedPaths";

        HttpWebRequest _request = null;
        HttpWebResponse _response = null;

        _request = (HttpWebRequest)WebRequest.Create(serviceUrl.ToString());
        _request.ContentLength = 0;
        _response = (HttpWebResponse)_request.GetResponse();

        return (SqlString)_response.ToString();
    }
}

我现在正在尝试使用 Test.sql 文件从 Visual Studio 测试 SQL CLR，该文件的设置如下：

-- To execute test from within Visual Studio, highlight the row(s) to execute and click hollow green button in this panes header or Ctrl+Shift+E

select dbo.ExecFoxPro_SayHello('Brian')

select dbo.GetAllowedPaths('http://localhost:9876/FoxProConnectService')

当我在 Visual Studio 2013 年的 Debug 中运行这个时，我得到以下错误（发生在 _request = (HttpWebRequest)WebRequest.Create(serviceUrl.ToString()); 行）：

Msg 6522, Level 16, State 1, Line 6
A .NET Framework error occurred during execution of user-defined routine or aggregate "GetAllowedPaths": 
System.Security.SecurityException: Request for the permission of type 'System.Net.WebPermission, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
System.Security.SecurityException: 
   at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet)
   at System.Security.CodeAccessPermission.Demand()
   at System.Net.HttpWebRequest.CheckConnectPermission(Uri uri, Boolean needExecutionContext)
   at System.Net.HttpWebRequest..ctor(Uri uri, ServicePoint servicePoint)
   at System.Net.HttpRequestCreator.Create(Uri Uri)
   at System.Net.WebRequest.Create(Uri requestUri, Boolean useUriBase)
   at UserDefinedFunctions.GetAllowedPaths(SqlString serviceUrl)
.

这需要什么权限以及如何分配？我宁愿不必设置权限，因为这是我们分发给不同客户的程序，我不能保证所有客户都具有相同的权限设置（即用户、访问级别等）

Answer 1

在 SQL Server management studio 中，找到包含您的 clr 的程序集，转到属性并将权限集更改为 "External Access" 或 "Unrestricted"。

WebRequest 来自 SQL CLR 错误

WebRequest From SQL CLR Error

c#

sqlclr

.net-4.5

visual-studio-2013