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C#模仿新浪微博长URL转短地址的方法

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一、前台判断用户输入URL的JS代码如下。

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("还能输入<span>" + (140 - $txtLength) + "</span>个字");  
    }  
    else {  
        $("#div_txtlength").html("超出<span>" + ($txtLength - 140) + "</span>个字");  
    }  

}  

function InsertText() {  
    if ($("#inp_text").val().Trim().length == 0) {  
        art.dialog({  
            title: '错误',  
            icon: 'error',  
            content: '请输入内容',  
            width: "150px",  
            height: "80px",  
            lock: true  
        });  
        return;  
    }  
    //长url转换成短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("还能输入<span>" + (140 - $txtLength) + "</span>个字");  
    }  
    else {  
        $("#div_txtlength").html("超出<span>" + ($txtLength - 140) + "</span>个字");  
    }  
    if ($txtLength > 140) {  
        art.dialog({  
            title: '错误',  
            icon: 'error',  
            content: '字数超出限制',  
            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: '错误',  
                    icon: 'error',  
                    content: '发布失败,请复制内容后刷新当前页面。',  
                    width: "150px",  
                    height: "80px",  
                    lock: true  
                });  
            }  
        },  
        complete: function (XMLHttpRequest, textStatus) {  
            //                    alert(XMLHttpRequest.responseText);  
            //                    alert(textStatus);  
        },  
        error: function () {  
        }  
    });  
}  

                                二、前台ASPX的代码如下(部分)
<div class="title_left">  
                    有什么新鲜事和大家分享?</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="#">  
                                图片</a></li>  
                            <li style="background: url(../images/weibo/icon.jpg) no-repeat -229px 0px;"><a href="#">  
                                音乐</a></li>  
                        </ul>  
                    </div>  
                    <div class="Prompt" id="div_txtlength">  
                        还能输入<span>140</span>字</div>  
                    <div class="bottom_gb">  
                        <a href="javascript:void(0)" onclick="InsertText();" class="link1"></a>  
                    </div>  
                </div>  

                                三、以上是用来判断用户输入内容里面是否含有网址,下面是后台提交到数据库的时候进行的转换
#region 长url转短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 写入微博数据库  
     --写入微博数据库的代码  
    #endregion  

                                四、MiniBlog.ShortUrl方法代码
#region 长转短url  
    /// <summary>  
    /// 长url转短url  
    /// </summary>  
    /// <param name="url">原url</param>  
    /// <returns>返回短url</returns>  
    public static string ShortUrl(string url)  
    {  
        //可以自定义生成MD5加密字符传前的混合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"};  
        //对传入网址进行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位一组16进制与0x3FFFFFFF进行位与运算  
            int hexint = 0x3FFFFFFF & Convert.ToInt32("0x" + hex.Substring(i * 8, 8), 16);  
            string outChars = string.Empty;  
            for (int j = 0; j < 6; j++)  
            {  
                //把得到的值与0x0000003D进行位与运算,取得字符数组chars索引  
                int index = 0x0000003D & hexint;  
                //把取得的字符相加  
                outChars += chars[index];  
                //每次循环按位右移5位  
                hexint = hexint >> 5;  
            }  
            //把字符串存入对应索引的输出数组  
            resUrl[i] = outChars;  
        }  
        return "http://url.cn/" + resUrl[(new Random()).Next(0, 3)];  
    }  
    #endregion  

                                五、短URL转换成原始URL
#region 短url替换成原始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, "链接已经被屏蔽");  
                    }  
                    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、数据库结构(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 '逻辑ID';  
comment on column MINIBLOGURL.surl  
  is '原始url';  
comment on column MINIBLOGURL.turl  
  is '转成的短url';  
comment on column MINIBLOGURL.createtime  
  is '创建时间';  
comment on column MINIBLOGURL.createuser  
  is '创建人ID';  
comment on column MINIBLOGURL.state  
  is '状态,0为认证的网址(比较知名的网站域名),1为未认证的网址(小网站),2为锁定不允许点击(广告类的网址)';  
comment on column MINIBLOGURL.backup1  
  is 'MD5值,用来比较网址是否已经存在';  
comment on column MINIBLOGURL.backup2  
  is '备用字段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,基于上面的代码即可完成微博的长短URL相互转换,具体应用的时候还需要自己进行调整修改。

标签:微博,短地址,C#

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