HttpWebRequest以URL结尾的URL

Question

当我使用WebRequest.Create(" http:// abc/test.")进行GET时,我得到404,因为根据fiddler,尾随点被.NET剥离,Web服务器需要点.我该如何防止或解决它.任何解决方法表示赞赏!

Answer 1

官方错误报告中的变通方法选项卡中的变通方法:

https://connect.microsoft.com/VisualStudio/feedback/details/386695/system-uri-incorrectly-strips-trailing-dots?wa=wsignin1.0#tabs

..似乎是有效的.基本上,在使用System.Uri之前,运行此代码以重置.NET中的静态标志:

MethodInfo getSyntax = typeof(UriParser).GetMethod("GetSyntax", System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic);
FieldInfo flagsField = typeof(UriParser).GetField("m_Flags", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic);
if (getSyntax != null && flagsField != null)
{
    foreach (string scheme in new[] { "http", "https" })
    {
        UriParser parser = (UriParser)getSyntax.Invoke(null, new object[] { scheme });
        if (parser != null)
        {
            int flagsValue = (int)flagsField.GetValue(parser);
            // Clear the CanonicalizeAsFilePath attribute
            if ((flagsValue & 0x1000000) != 0)
                flagsField.SetValue(parser, flagsValue & ~0x1000000);
        }
    }
}

证明:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            var surl = "http://x/y./z";

            var url = new Uri(surl);
            Console.WriteLine("Broken: " + url.ToString());

            MethodInfo getSyntax = typeof(UriParser).GetMethod("GetSyntax", System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic);
            FieldInfo flagsField = typeof(UriParser).GetField("m_Flags", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic);
            if (getSyntax != null && flagsField != null)
            {
                foreach (string scheme in new[] { "http", "https" })
                {
                    UriParser parser = (UriParser)getSyntax.Invoke(null, new object[] { scheme });
                    if (parser != null)
                    {
                        int flagsValue = (int)flagsField.GetValue(parser);
                        // Clear the CanonicalizeAsFilePath attribute
                        if ((flagsValue & 0x1000000) != 0)
                            flagsField.SetValue(parser, flagsValue & ~0x1000000);
                    }
                }
            }

            url = new Uri(surl);
            Console.WriteLine("Fixed: " + url.ToString());

            Console.WriteLine("Press ENTER to exit ...");
            Console.ReadLine();
        }
    }
}

Answer 2

这是 Microsoft 论坛上多次出现的已知问题。

该类Uri错误地认为所有 URI 的行为都像 Windows 磁盘文件，其中尾随点（对于无文件扩展名）不相关。

http://social.msdn.microsoft.com/Forums/en-US/netfxbcl/thread/5206beca-071f-485d-a2bd-657d635239c9/