如何自动识别判断url中的中文参数是GB2312仍是Utf-8编码？

时间 2019-11-19

标签如何自动识别判断 url 中文参数 gb2312 仍是 utf 编码栏目 HTTP/TCP 繁體版

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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Web; using System.Text.RegularExpressions; namespace ConsoleApplication2 { class Program { public static string DecodeURL2(String uriString) { if (Regex.IsMatch( HttpUtility.UrlDecode(uriString, Encoding.GetEncoding("iso-8859-1")), @"^(?:[x00-x7f]|[xe0-xef][x80-xbf]{2})+$" // 若是不考虑哪些什么拉丁文啊，希腊文啊。。。乱七八糟的外文，用这个短的正则 )) { return HttpUtility.UrlDecode(uriString, Encoding.GetEncoding("UTF-8")); } else { return HttpUtility.UrlDecode(uriString, Encoding.GetEncoding("GB2312")); } } public static string DecodeURL(String uriString) { if (Regex.IsMatch( HttpUtility.UrlDecode(uriString, Encoding.GetEncoding("iso-8859-1")), @"^(?:[x00-x7f]|[xfc-xff][x80-xbf]{5}|[xf8-xfb][x80-xbf]{4}|[xf0-xf7][x80-xbf]{3}|[xe0-xef][x80-xbf]{2}|[xc0-xdf][x80-xbf])+$" )) { return HttpUtility.UrlDecode(uriString, Encoding.GetEncoding("UTF-8")); } else { return HttpUtility.UrlDecode(uriString, Encoding.GetEncoding("GB2312")); } } public static void Main(string[] args) { Console.WriteLine("----------------------------------------------"); Console.WriteLine(DecodeURL(".net%bc%bc%ca%f5")); Console.WriteLine(DecodeURL(".net%e6%8a%80%e6%9c%af")); Console.WriteLine("----------------------------------------------"); Console.WriteLine(DecodeURL("%B8%A7%CB%B3%C7%E0%CB%C9%D2%A9%D2%B5")); Console.WriteLine(DecodeURL("%E6%8A%9A%E9%A1%BA%E9%9D%92%E6%9D%BE%E8%8D%AF%E4%B8%9A")); Console.WriteLine("------------------↓↓↓下面的出问题↓↓↓------------------"); Console.WriteLine(DecodeURL("%E8%81%94%E9%80%9A")); // 正常 Console.WriteLine(DecodeURL("%C1%AA%CD%A8")); // 发生编码误认 // 编码误认，并无好的解决方案，由于utf-8和gbk编码结果存在交叉，咱们都知道，记事本也都会出现这种状况 Console.WriteLine("------------------↑↑↑上面的出问题↑↑↑------------------"); Console.WriteLine(DecodeURL2("%E8%81%94%E9%80%9A")); // 正常 Console.WriteLine(DecodeURL2("%C1%AA%CD%A8")); // 不会误认 Console.WriteLine("----------------------------------------------"); Console.ReadKey(); } } }