C#實現(xiàn)類似新浪微博長URL轉短地址的方法

更新時間：2015年04月27日 10:10:52 作者：igoo

這篇文章主要介紹了C#實現(xiàn)類似新浪微博長URL轉短地址的方法,涉及C#操作正則表達式的相關技巧,非常具有實用價值,需要的朋友可以參考下

本文實例講述了C#實現(xiàn)類似新浪微博長URL轉短地址的方法。分享給大家供大家參考。具體如下：

一、前臺判斷用戶輸入URL的JS代碼如下。

function CheckInput() { 
 var $txtLength = $("#inp_text").val().length; 
 if ($txtLength > 10) { 
  var url = $("#inp_text").val(); 
  var xx = url.match(RegExp("((news|telnet|nttp|file|http|ftp|https)://){1}(([-A-Za-z0-9]+(\\.[-A-Za-z0-9]+)*(\\.[-A-Za-z]{2,5}))|([0-9]{1,3}(\\.[0-9]{1,3}){3}))(:[0-9]*)?(/[-A-Za-z0-9_\\$\\.\\+\\!\\*\\(\\),;:@&=\\?/~\\#\\%]*)*", "gi") || []); 
  if (xx != null) { 
   for (var i = 0; i < xx.length; i++) { 
    var $txtLength = $("#inp_text").val().length; 
    $txtLength = $txtLength - xx[i].length + 11; 
   } 
  } 
 } 
 if ($txtLength < 141) { 
  $("#div_txtlength").html("還能輸入<span>" + (140 - $txtLength) + "</span>個字"); 
 } 
 else { 
  $("#div_txtlength").html("超出<span>" + ($txtLength - 140) + "</span>個字"); 
 } 
} 
function InsertText() { 
 if ($("#inp_text").val().Trim().length == 0) { 
  art.dialog({ 
   title: '錯誤', 
   icon: 'error', 
   content: '請輸入內容', 
   width: "150px", 
   height: "80px", 
   lock: true 
  }); 
  return; 
 } 
 //長url轉換成短url 
 var url = $("#inp_text").val(); 
 var xx = url.match(RegExp("((news|telnet|nttp|file|http|ftp|https)://){1}(([-A-Za-z0-9]+(\\.[-A-Za-z0-9]+)*(\\.[-A-Za-z]{2,5}))|([0-9]{1,3}(\\.[0-9]{1,3}){3}))(:[0-9]*)?(/[-A-Za-z0-9_\\$\\.\\+\\!\\*\\(\\),;:@&=\\?/~\\#\\%]*)*", "gi") || []); 
 var $txtLength = $("#inp_text").val().length; 
 if (xx != null) { 
  for (var i = 0; i < xx.length; i++) { 
   $txtLength = $txtLength - xx[i].length + 11; 
  } 
 } 
 if ($txtLength < 141) { 
  $("#div_txtlength").html("還能輸入<span>" + (140 - $txtLength) + "</span>個字"); 
 } 
 else { 
  $("#div_txtlength").html("超出<span>" + ($txtLength - 140) + "</span>個字"); 
 } 
 if ($txtLength > 140) { 
  art.dialog({ 
   title: '錯誤', 
   icon: 'error', 
   content: '字數(shù)超出限制', 
   width: "150px", 
   height: "80px", 
   lock: true 
  }); 
  return false; 
 } 
 $.ajax({ 
  type: "POST", 
  url: "../MiniBlog/Handler.ashx", 
  data: { "txt": $("#inp_text").val() }, 
  datatype: "html", 
  beforeSend: function () { $("#div_txtlength").html("正在提交。。。"); }, 
  success: function (data) { 
   if (data.length > 1) { 
    window.location.reload(); 
   } 
   else { 
    art.dialog({ 
     title: '錯誤', 
     icon: 'error', 
     content: '發(fā)布失敗，請復制內容后刷新當前頁面。', 
     width: "150px", 
     height: "80px", 
     lock: true 
    }); 
   } 
  }, 
  complete: function (XMLHttpRequest, textStatus) { 
   //     alert(XMLHttpRequest.responseText); 
   //     alert(textStatus); 
  }, 
  error: function () { 
  } 
 }); 
}

二、前臺ASPX的代碼如下（部分）

<div class="title_left"> 
 有什么新鮮事和大家分享？</div> 
<div class="left_box"> 
 <textarea class="textarea01" id="inp_text" onblur="CheckInput()" onkeyup="CheckInput()">
</textarea></div> 
<div class="left_box"> 
 <div class="insert" style="visibility: hidden"> 
  <ul> 
   <li style="background: url(../images/weibo/icon.jpg) no-repeat -172px 0px;">
<a href="#"> 表情</a></li> 
   <li style="background: url(../images/weibo/icon.jpg) no-repeat -115px 0px;">
<a href="#"> 圖片</a></li> 
   <li style="background: url(../images/weibo/icon.jpg) no-repeat -229px 0px;">
<a href="#"> 音樂</a></li> 
  </ul> 
 </div> 
 <div class="Prompt" id="div_txtlength"> 
  還能輸入<span>140</span>字</div> 
 <div class="bottom_gb"> 
  <a href="javascript:void(0)" onclick="InsertText();" class="link1"></a> 
 </div> 
</div>

三、以上是用來判斷用戶輸入內容里面是否含有網(wǎng)址，下面是后臺提交到數(shù)據(jù)庫的時候進行的轉換

#region 長url轉短url 
Regex rx = new Regex("((news|telnet|nttp|file|http|ftp|https)://){1}(([-A-Za-z0-9]+(\\.[-A-Za-z0-9]+)*(\\.[-A-Za-z]{2,5}))|([0-9]{1,3}(\\.[0-9]{1,3}){3}))(:[0-9]*)?(/[-A-Za-z0-9_\\$\\.\\+\\!\\*\\(\\),;:@&=\\?/~\\#\\%]*)*", RegexOptions.IgnoreCase); 
string txt_context = context.Request.Form["txt"].ToString(); 
MatchCollection mc = rx.Matches(txt_context); 
if (mc.Count > 0) 
{ 
   for (int i = 0; i < mc.Count; i++) 
   { 
    Haedu.Gxt.Model.MINIBLOGURL_Model M_url = new Haedu.Gxt.Model.MINIBLOGURL_Model(); 
    Haedu.Gxt.Bll.MINIBLOGURL B_url = new Haedu.Gxt.Bll.MINIBLOGURL(); 
    M_url.BACKUP1 = Common.md5(mc[i].Value); 
    M_url.BACKUP2 = " "; 
    M_url.CREATETIME = DateTime.Now; 
    M_url.CREATEUSER = User_BaseInfo.GetUserID; 
    M_url.ID = Common.GetGUID; 
    M_url.STATE = 0; 
    M_url.SURL = mc[0].Value; 
    M_url.TURL = MiniBlog.ShortUrl(mc[i].Value); 
    txt_context = txt_context.Replace(mc[i].Value, M_url.TURL); 
     
    if(!B_url.Exists(M_url.BACKUP1)) 
    { 
     B_url.Add(M_url); 
    } 
   } 
  } 
#endregion 
#region 寫入微博數(shù)據(jù)庫 
--寫入微博數(shù)據(jù)庫的代碼 
#endregion

四、MiniBlog.ShortUrl方法代碼

#region 長轉短url 
/// <summary> 
/// 長url轉短url 
/// </summary> 
/// <param name="url">原url</param> 
/// <returns>返回短url</returns> 
public static string ShortUrl(string url) 
{ 
  //可以自定義生成MD5加密字符傳前的混合KEY 
  string key = "Haedu_MiniBlog"; 
  //要使用生成URL的字符 
  string[] chars = new string[]{ 
    "a","b","c","d","e","f","g","h", 
    "i","j","k","l","m","n","o","p", 
    "q","r","s","t","u","v","w","x", 
    "y","z","0","1","2","3","4","5", 
    "6","7","8","9","A","B","C","D", 
    "E","F","G","H","I","J","K","L", 
    "M","N","O","P","Q","R","S","T", 
    "U","V","W","X","Y","Z"}; 
  //對傳入網(wǎng)址進行MD5加密 
  string hex = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(key + url, "md5"); 
  string[] resUrl = new string[4]; 
  for (int i = 0; i < 4; i++) 
  { 
   //把加密字符按照8位一組16進制與0x3FFFFFFF進行位與運算 
   int hexint = 0x3FFFFFFF & Convert.ToInt32("0x" + hex.Substring(i * 8, 8), 16); 
   string outChars = string.Empty; 
   for (int j = 0; j < 6; j++) 
   { 
    //把得到的值與0x0000003D進行位與運算，取得字符數(shù)組chars索引 
    int index = 0x0000003D & hexint; 
    //把取得的字符相加 
    outChars += chars[index]; 
    //每次循環(huán)按位右移5位 
    hexint = hexint >> 5; 
   } 
   //把字符串存入對應索引的輸出數(shù)組 
   resUrl[i] = outChars; 
  } 
  return "http://url.cn/" + resUrl[(new Random()).Next(0, 3)]; 
} 
#endregion

五、短URL轉換成原始URL

#region 短url替換成原始url 
public static string CheckUrl(string context) 
{ 
  Regex rx = new Regex("((news|telnet|nttp|file|http|ftp|https)://){1}(([-A-Za-z0-9]+(\\.[-A-Za-z0-9]+)*(\\.[-A-Za-z]{2,5}))|([0-9]{1,3}(\\.[0-9]{1,3}){3}))(:[0-9]*)?(/[-A-Za-z0-9_\\$\\.\\+\\!\\*\\(\\),;:@&=\\?/~\\#\\%]*)*", RegexOptions.IgnoreCase); 
  MatchCollection mc = rx.Matches(context); 
  if (mc.Count > 0) 
  { 
   for (int i = 0; i < mc.Count; i++) 
   { 
    Haedu.Gxt.Model.MINIBLOGURL_Model M_url = new Haedu.Gxt.Model.MINIBLOGURL_Model(); 
    Haedu.Gxt.Bll.MINIBLOGURL B_url = new Haedu.Gxt.Bll.MINIBLOGURL(); 
    M_url = B_url.GetModel(mc[i].Value); 
    if (M_url != null) 
    { 
     if (int.Parse(M_url.STATE.ToString()) == 2) 
     { 
      context = context.Replace(mc[i].Value, "鏈接已經(jīng)被屏蔽"); 
     } 
     else 
     { 
      context = context.Replace(mc[i].Value, "<a href=\"" + M_url.SURL + "\" target=\"_blank\" title=\"" + M_url.SURL + "\" >" + mc[i].Value + "</a>"); 
     } 
    } 
   } 
  } 
  return context; 
} 
#endregion

六、數(shù)據(jù)庫結構（oracle）

-- Create table 
create table MINIBLOGURL 
( 
 id   VARCHAR2(50) not null, 
 surl  VARCHAR2(200) not null, 
 turl  VARCHAR2(100) not null, 
 createtime DATE not null, 
 createuser VARCHAR2(50) not null, 
 state  NUMBER(1) not null, 
 backup1 VARCHAR2(200) not null, 
 backup2 VARCHAR2(200) not null 
) 
tablespace TAB_GXT 
 pctfree 10 
 initrans 1 
 maxtrans 255 
 storage 
 ( 
 initial 64K 
 next 8K 
 minextents 1 
 maxextents unlimited 
 ); 
-- Add comments to the columns 
comment on column MINIBLOGURL.id 
 is '邏輯ID'; 
comment on column MINIBLOGURL.surl 
 is '原始url'; 
comment on column MINIBLOGURL.turl 
 is '轉成的短url'; 
comment on column MINIBLOGURL.createtime 
 is '創(chuàng)建時間'; 
comment on column MINIBLOGURL.createuser 
 is '創(chuàng)建人ID'; 
comment on column MINIBLOGURL.state 
 is '狀態(tài)，0為認證的網(wǎng)址（比較知名的網(wǎng)站域名），1為未認證的網(wǎng)址（小網(wǎng)站），2為鎖定不允許點擊（廣告類的網(wǎng)址）'; 
comment on column MINIBLOGURL.backup1 
 is 'MD5值，用來比較網(wǎng)址是否已經(jīng)存在'; 
comment on column MINIBLOGURL.backup2 
 is '備用字段2'; 
-- Create/Recreate primary, unique and foreign key constraints 
alter table MINIBLOGURL 
 add constraint PK_ID primary key (ID) 
 using index 
 tablespace TAB_GXT 
 pctfree 10 
 initrans 2 
 maxtrans 255 
 storage 
 ( 
 initial 64K 
 next 1M 
 minextents 1 
 maxextents unlimited 
 ); 
-- Create/Recreate indexes 
create index IX_CREATEUSER on MINIBLOGURL (CREATEUSER) 
 tablespace TAB_GXT 
 pctfree 10 
 initrans 2 
 maxtrans 255 
 storage 
 ( 
 initial 64K 
 next 1M 
 minextents 1 
 maxextents unlimited 
 ); 
create unique index IX_MD5 on MINIBLOGURL (BACKUP1) 
 tablespace TAB_GXT 
 pctfree 10 
 initrans 2 
 maxtrans 255 
 storage 
 ( 
 initial 64K 
 next 1M 
 minextents 1 
 maxextents unlimited 
 ); 
create index IX_SURL on MINIBLOGURL (SURL) 
 tablespace TAB_GXT 
 pctfree 10 
 initrans 2 
 maxtrans 255 
 storage 
 ( 
 initial 64K 
 next 1M 
 minextents 1 
 maxextents unlimited 
 ); 
create index IX_TURL on MINIBLOGURL (TURL) 
 tablespace TAB_GXT 
 pctfree 10 
 initrans 2 
 maxtrans 255 
 storage 
 ( 
 initial 64K 
 next 1M 
 minextents 1 
 maxextents unlimited 
 );

至此，基于上面的代碼即可完成微博的長短URL相互轉換，具體應用的時候還需要自己進行調整修改。

希望本文所述對大家的C#程序設計有所幫助。

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