Url 相关操作

【301重定向】

1 static void Redirect301(string url)

2 {

3       HttpContext.Current.Response.StatusCode = 301;

4       HttpContext.Current.Response.RedirectLocation = url;

5       HttpContext.Current.Response.End();

6 }

【串行参数】

1  static string GetQueryString(NameValueCollection list)

2  {

3        StringBuilder sb = new StringBuilder();          

4        for (int i=0; i<list.Count; i++)

5        {               

6          sb.AppendFormat("{0}={1}&",list.GetKey(i),HttpUtility.UrlEncode(list[i]));

7        }

8        return sb.ToString().Trim('&');

9  }

【将带~/ 的相对地址转为绝对地址】

 1  static string ResolveUrl(string url)

 2 {

 3     string approot = HttpContext.Current.Request.ApplicationPath;

 4     if (url.Length == 0 || url[0] != '~')

 5         return url;

 6     else

 7     {

 8         if (url.Length == 1)

 9             return approot;  

10         if (url[1] == '/' || url[1] == '\\')

11         {

12             // url: ~/  或者  ~\

13             if (approot.Length > 1)

14                 return approot + "/" + url.Substring(2);

15             else

16                 return "/" + url.Substring(2);

17         }

18         else

19         {

20             // url: ~xxxxx

21             if (approot.Length > 1)

22                 return approot + "/" + url.Substring(1);

23             else

24                 return approot + url.Substring(1);

25         }

26     }

27 }

【UrlEncode || UrlDecode】

UrlEncode || UrlDecode

 1 static string unreservedChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.~";

 2 

 3 public static string UrlEncode(this string value)

 4 {

 5     StringBuilder result = new StringBuilder();

 6     foreach (char symbol in value)

 7     {

 8         if (unreservedChars.IndexOf(symbol) > -1)

 9         {

10             result.Append(symbol);

11         }

12         else

13         {

14             result.AppendFormat("%{0:X2}", (int)symbol);

15         }

16     }

17     return result.ToString();

18 }

19 

20 public static string UrlEncode(this string value, Encoding encode)

21 {

22     StringBuilder result = new StringBuilder();

23     byte[] data = encode.GetBytes(value);

24     int len = data.Length;

25 

26     for (int i = 0; i < len; i++)

27     {

28         int c = data[i];

29         if (c < 0x80 && unreservedChars.IndexOf((char)c) != -1)

30         {

31             result.Append((char)c);

32         }

33         else

34         {

35             result.Append('%' + String.Format("{0:X2}", (int)data[i]));

36         }

37     }

38 

39     return result.ToString();

40 }

【Timestamp】

Timestamp

1 public static string GetTimestamp()

2 {

3     var date1970 = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);

4     var timeStamp = (long)DateTime.UtcNow.Subtract(date1970).TotalSeconds;

5     return timeStamp.ToString();

6 }

【request】

1 public XDocument GetXml(string url)

2 {

3        XDocument doc = null;

4        var str = new WebClient().DownloadString(url);

5        doc = XDocument.Parse(str);

6        return doc;

7  }

 1 public XDocument  GetXml(string apiUrl)

 2 { 

 3   XDocument doc = null;

 4   var request = HttpWebRequest.Create(apiUrl) as HttpWebRequest;

 5   request.Method = "POST";

 6   try

 7   {

 8      var response = request.GetResponse() as HttpWebResponse;

 9      if (response.StatusCode == HttpStatusCode.OK)

10       {

11             using (var sr = new StreamReader(response.GetResponseStream()))

12            {

13                    doc = XDocument.Parse(sr.ReadToEnd());

14            }

15 

16        }

17   }

18   catch (WebException ex)

19   {

20         throw ex;

21   }

22 

23   return doc;

24 }

 【Url重写】

UrlRewriteModule

 1 public class UrlRewriteModule : IHttpModule

 2     {   

 3         public void Dispose()

 4         {

 5         }

 6 

 7         public void Init(HttpApplication context)

 8         {

 9             context.BeginRequest += new EventHandler(context_BeginRequest);

10         }

11 

12         void context_BeginRequest(object sender, EventArgs e)

13         {

14             var application = (HttpApplication)sender;

15             var context = application.Context;

16             var request = context.Request;

17             var url = request.Path;

18            var newUrl=GetRewriteUrl(url);

19             var parms=new NameValueCollection();           

20                 parms["id"] = 101; 

21                 parms["type"]=2;           

22             context.RewritePath(newUrl, String.Empty,   GetQueryString(parms));

23        }

24 }

Web.Config

1 <?xml version="1.0"?>

2 <configuration>

3    <system.web>

4      <httpModules>

5          <add name="RewriteModule" type="UrlRewrite.UrlRewriteModule, UrlRewrite"/>

6        </httpModules>

7   </system.web>

8 </configuration>