asp.net采集函数（采集、分析、替换、入库）
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using MSXML2;
using System.Text.RegularExpressions;
namespace EC
{
/// <summary>
/// 远程文件抓取类
/// </summary>
public class GetRemoteObj
{
#region 构造与析构函数
public GetRemoteObj()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
~ GetRemoteObj()
{
Dispose();
}
#endregion
#region IDisposable 成员
public void Dispose()
{
GC.SuppressFinalize( this );
}
#endregion
#region 日期随机函数
/* *********************************
* 函数名称:DateRndName
* 功能说明:日期随机函数
* 参 数:ra:随机数
* 调用示例:
* GetRemoteObj o = new GetRemoteObj();
* Random ra = new Random();
* string s = o.DateRndName(ra);
* Response.Write(s);
* o.Dispose();
* ******************************* */
/// <summary>
/// 日期随机函数
/// </summary>
/// <param name="ra"> 随机数 </param>
/// <returns></returns>
public string DateRndName(Random ra)
{
DateTime d = DateTime.Now;
string s = null , y, m, dd, h, mm, ss;
y = d.Year.ToString();
m = d.Month.ToString();
if (m.Length < 2 ) m = " 0 " + m;
dd = d.Day.ToString();
if (dd.Length < 2 ) dd = " 0 " + dd;
h = d.Hour.ToString();
if (h.Length < 2 ) h = " 0 " + h;
mm = d.Minute.ToString();
if (mm.Length < 2 ) mm = " 0 " + mm;
ss = d.Second.ToString();
if (ss.Length < 2 ) ss = " 0 " + ss;
s += y + m + dd + h + mm + ss;
s += ra.Next( 100 , 999 ).ToString();
return s;
}
#endregion
#region 取得文件后缀
/* *********************************
* 函数名称:GetFileExtends
* 功能说明:取得文件后缀
* 参 数:filename:文件名称
* 调用示例:
* GetRemoteObj o = new GetRemoteObj();
* string url = @" http://www.zhaobus.net/images/zhaobus.jpg ";
* string s = o.GetFileExtends(url);
* Response.Write(s);
* o.Dispose();
* ******************************* */
/// <summary>
/// 取得文件后缀
/// </summary>
/// <param name="filename"> 文件名称 </param>
/// <returns></returns>
public string GetFileExtends( string filename)
{
string ext = null ;
if (filename.IndexOf( ' . ' ) > 0 )
{
string [] fs = filename.Split( ' . ' );
ext = fs[fs.Length - 1 ];
}
return ext;
}
#endregion
#region 获取远程文件源代码
/* *********************************
* 函数名称:GetRemoteHtmlCode
* 功能说明:获取远程文件源代码
* 参 数:Url:远程url
* 调用示例:
* GetRemoteObj o = new GetRemoteObj();
* string url = @" http://www.baidu.com ";
* string s = o.GetRemoteHtmlCode(url);
* Response.Write(s);
* o.Dispose();
* ******************************* */
/// <summary>
/// 获取远程文件源代码
/// </summary>
/// <param name="url"> 远程url </param>
/// <returns></returns>
public string GetRemoteHtmlCode( string Url)
{
string s = "" ;
MSXML2.XMLHTTP _xmlhttp = new MSXML2.XMLHTTPClass();
_xmlhttp.open( " GET " , Url, false , null , null );
_xmlhttp.send( "" );
if (_xmlhttp.readyState == 4 )
{
s = System.Text.Encoding.Default.GetString(( byte [])_xmlhttp.responseBody);
}
return s;
}
#endregion
#region 保存远程文件
/* *********************************
* 函数名称：RemoteSave
* 功能说明：保存远程文件
* 参 数：Url:远程url;Path:保存到的路径
* 调用示例:
* GetRemoteObj o = new GetRemoteObj();
* string s = "";
* string url = @" http://www.zhaobus.net/images/zhaobus.jpg ";
* string path =Server.MapPath("Html/");
* s = o.RemoteSave(url,path);
* Response.Write(s);
* o.Dispose();
* ***************************** */
/// <summary>
/// 保存远程文件
/// </summary>
/// <param name="Url"> 远程url </param>
/// <param name="Path"> 保存到的路径 </param>
/// <returns></returns>
public string RemoteSave( string Url, string Path)
{
Random ra = new Random();
string StringFileName = DateRndName(ra) + " . " + GetFileExtends(Url);
string StringFilePath = Path + StringFileName;
MSXML2.XMLHTTP _xmlhttp = new MSXML2.XMLHTTPClass();
_xmlhttp.open( " GET " , Url, false , null , null );
_xmlhttp.send( "" );
if (_xmlhttp.readyState == 4 )
{
if (System.IO.File.Exists(StringFilePath))
System.IO.File.Delete(StringFilePath);
System.IO.FileStream fs = new System.IO.FileStream(StringFilePath,
System.IO.FileMode.CreateNew);
System.IO.BinaryWriter w = new System.IO.BinaryWriter(fs);
w.Write(( byte [])_xmlhttp.responseBody);
w.Close();
fs.Close();
}
else
throw new Exception(_xmlhttp.statusText);
return StringFileName;
}
#endregion
#region 替换网页中的换行和引号
/* *********************************
* 函数名称:ReplaceEnter
* 功能说明:替换网页中的换行和引号
* 参 数:HtmlCode:html源代码
* 调用示例:
* GetRemoteObj o = new GetRemoteObj();
* string Url = @" http://www.zhaobus.net ";
* strion HtmlCode = o.GetRemoteHtmlCode(Url);
* string s = o.ReplaceEnter(HtmlCode);
* Response.Write(s);
* o.Dispose();
* ******************************* */
/// <summary>
/// 替换网页中的换行和引号
/// </summary>
/// <param name="HtmlCode"> HTML源代码 </param>
/// <returns></returns>
public string ReplaceEnter( string HtmlCode)
{
string s = "" ;
if (HtmlCode == null || HtmlCode == "" )
s = "" ;
else
s = HtmlCode.Replace( " \ "" , "" );
s = s.Replace( " \r\n " , "" );
return s;
}
#endregion
#region 执行正则提取出值
/* *********************************
* 函数名称:GetRegValue
* 功能说明:执行正则提取出值
* 参 数:HtmlCode:html源代码
* 调用示例:
* GetRemoteObj o = new GetRemoteObj();
* string Url = @" http://www.zhaobus.net ";
* strion HtmlCode = o.GetRemoteHtmlCode(Url);
* string s = o.ReplaceEnter(HtmlCode);
* string Reg="<title>.+?</title>";
* string GetValue=o.GetRegValue(Reg,HtmlCode)
* Response.Write(GetValue);
* o.Dispose();
* ******************************* */
/// <summary>
/// 执行正则提取出值
/// </summary>
/// <param name="RegexString"> 正则表达式 </param>
/// <param name="RemoteStr"> HtmlCode源代码 </param>
/// <returns></returns>
public string GetRegValue( string RegexString, string RemoteStr)
{
string MatchVale = "" ;
Regex r = new Regex(RegexString);
Match m = r.Match(RemoteStr);
if (m.Success)
{
MatchVale = m.Value;
}
return MatchVale;
}
#endregion
#region 替换HTML源代码
/* *********************************
* 函数名称:RemoveHTML
* 功能说明:替换HTML源代码
* 参 数:HtmlCode:html源代码
* 调用示例:
* GetRemoteObj o = new GetRemoteObj();
* string Url = @" http://www.zhaobus.net ";
* strion HtmlCode = o.GetRemoteHtmlCode(Url);
* string s = o.ReplaceEnter(HtmlCode);
* string Reg="<title>.+?</title>";
* string GetValue=o.GetRegValue(Reg,HtmlCode)
* Response.Write(GetValue);
* o.Dispose();
* ******************************* */
/// <summary>
/// 替换HTML源代码
/// </summary>
/// <param name="HtmlCode"> html源代码 </param>
/// <returns></returns>
public string RemoveHTML( string HtmlCode)
{
string MatchVale = HtmlCode;
foreach (Match s in Regex.Matches(HtmlCode, " <.+?> " ))
{
MatchVale = MatchVale.Replace(s.Value, "" );
}
return MatchVale;
}
#endregion
#region 匹配页面的链接
/* *********************************
* 函数名称:GetHref
* 功能说明:匹配页面的链接
* 参 数:HtmlCode:html源代码
* 调用示例:
* GetRemoteObj o = new GetRemoteObj();
* string Url = @" http://www.zhaobus.net ";
* strion HtmlCode = o.GetRemoteHtmlCode(Url);
* string s = o.GetHref(HtmlCode);
* Response.Write(s);
* o.Dispose();
* ******************************* */
/// <summary>
/// 获取页面的链接正则
/// </summary>
/// <param name="HtmlCode"></param>
/// <returns></returns>
public string GetHref( string HtmlCode)
{
string MatchVale = "" ;
string Reg = @" (h|H)(r|R)(e|E)(f|F) *= *('|"")?((\w|\\|\/|\.|:|-|_)+)('|""| *|>)? " ;
foreach (Match m in Regex.Matches(HtmlCode, Reg))
{
MatchVale += (m.Value).ToLower().Replace( " href= " , "" ).Trim() + " || " ;
}
return MatchVale;
}
#endregion
#region 匹配页面的图片地址
/* *********************************
* 函数名称:GetImgSrc
* 功能说明:匹配页面的图片地址
* 参 数:HtmlCode:html源代码;imgHttp:要补充的http.当比如:<img src="bb/x.gif">则要补充http://www.zhaobus.net/,当包含http信息时,则可以为空
* 调用示例:
* GetRemoteObj o = new GetRemoteObj();
* string Url = @" http://www.zhaobus.net ";
* strion HtmlCode = o.GetRemoteHtmlCode(Url);
* string s = o.GetImgSrc(HtmlCode," http://www.zhaobus.net/ ");
* Response.Write(s);
* o.Dispose();
* ******************************* */
/// <summary>
/// 匹配页面的图片地址
/// </summary>
/// <param name="HtmlCode"></param>
/// <param name="imgHttp"> 要补充的http://路径信息 </param>
/// <returns></returns>
public string GetImgSrc( string HtmlCode, string imgHttp)
{
string MatchVale = "" ;
string Reg = @" <img.+?> " ;
foreach (Match m in Regex.Matches(HtmlCode, Reg))
{
MatchVale += GetImg((m.Value).ToLower().Trim(), imgHttp) + " || " ;
}
return MatchVale;
}
/// <summary>
/// 匹配 <img src="" /> 中的图片路径实际链接
/// </summary>
/// <param name="ImgString"><img src="" /> 字符串 </param>
/// <returns></returns>
public string GetImg( string ImgString, string imgHttp)
{
string MatchVale = "" ;
string Reg = @" src=.+\.(bmp|jpg|gif|png|) " ;
foreach (Match m in Regex.Matches(ImgString.ToLower(), Reg))
{
MatchVale += (m.Value).ToLower().Trim().Replace( " src= " , "" );
}
return (imgHttp + MatchVale);
}
#endregion
#region 替换通过正则获取字符串所带的正则首尾匹配字符串
/* *********************************
* 函数名称:GetHref
* 功能说明:匹配页面的链接
* 参 数:HtmlCode:html源代码
* 调用示例:
* GetRemoteObj o = new GetRemoteObj();
* string Url = @" http://www.zhaobus.net ";
* strion HtmlCode = o.GetRemoteHtmlCode(Url);
* string s = o.RegReplace(HtmlCode,"<title>","</title>");
* Response.Write(s);
* o.Dispose();
* ******************************* */
/// <summary>
/// 替换通过正则获取字符串所带的正则首尾匹配字符串
/// </summary>
/// <param name="RegValue"> 要替换的值 </param>
/// <param name="regStart"> 正则匹配的首字符串 </param>
/// <param name="regEnd"> 正则匹配的尾字符串 </param>
/// <returns></returns>
public string RegReplace( string RegValue, string regStart, string regEnd)
{
string s = RegValue;
if (RegValue != "" && RegValue != null )
{
if (regStart != "" && regStart != null )
{
s = s.Replace(regStart, "" );
}
if (regEnd != "" && regEnd != null )
{
s = s.Replace(regEnd, "" );
}
}
return s;
}
#endregion
}
}
记得添加引用 Interop.MSXML2.dll 否则msxml2命名空间用不了