/// <summary>方法一：比较推荐
/// 用HttpWebRequest取得网页源码
/// 对于带BOM的网页很有效，不管是什么编码都能正确识别
/// </summary>
/// <param name="url">网页地址" </param>
/// <returns>返回网页源文件</returns>
public static string GetHtmlSource2(string url,Encoding code)
{
//处理内容
string html = "";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Accept = "*/*"; //接受任意文件
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.1.4322)"; // 模拟使用IE在浏览
request.AllowAutoRedirect = true;//是否允许302
//request.CookieContainer = new CookieContainer();//cookie容器，
request.Referer = url; //当前页面的引用
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream stream = response.GetResponseStream();
StreamReader reader = new StreamReader(stream, code);
html = reader.ReadToEnd();
stream.Close();
return html;
} //方法二：
public static string GetHttpData2(string Url)
{
string sException = null;
string sRslt = null;
WebResponse oWebRps = null;
WebRequest oWebRqst = WebRequest.Create(Url);
oWebRqst.Timeout = ;
try
{
oWebRps = oWebRqst.GetResponse();
}
catch (WebException e)
{
sException = e.Message.ToString();
}
catch (Exception e)
{
sException = e.ToString();
}
finally
{
if (oWebRps != null)
{
StreamReader oStreamRd = new StreamReader(oWebRps.GetResponseStream(), Encoding.GetEncoding("utf-8"));
sRslt = oStreamRd.ReadToEnd();
oStreamRd.Close();
oWebRps.Close();
}
}
return sRslt;
} /// <summary>方法三：
///
/// </summary>
/// <param name="url">/要访问的网站地址</param>
/// <param name="charSets">目标网页的编码，如果传入的是null或者"",那就自动分析网页的编码</param>
/// <returns></returns>
public static string getHtml(string url, params string[] charSets)
{
try
{
string charSet = null;
if (charSets.Length == )
{
charSet = charSets[];
}
WebClient myWebClient = new WebClient(); //创建WebClient实例myWebClient
// 需要注意的：
//有的网页可能下不下来，有种种原因比如需要cookie,编码问题等等
//这是就要具体问题具体分析比如在头部加入cookie
// webclient.Headers.Add("Cookie", cookie);
//这样可能需要一些重载方法.根据需要写就可以了
//获取或设置用于对向 Internet 资源的请求进行身份验证的网络凭据.
myWebClient.Credentials = CredentialCache.DefaultCredentials;
//如果服务器要验证用户名，密码
//NetworkCredential mycred = new NetworkCredential(struser, strpassword);
//myWebClient.Credentials = mycred;
//从资源下载数据并返回字节数组.(加@是因为网址中间有"/"符号)
byte[] myDataBuffer = myWebClient.DownloadData(url);
string strWebData = Encoding.Default.GetString(myDataBuffer);
//获取网页字符编码描述信息
Match charSetMatch = Regex.Match(strWebData, "<meta([^<]*)charset=([^<]*)", RegexOptions.IgnoreCase | RegexOptions.Multiline);
string webCharSet = charSetMatch.Groups[].Value;
if (charSet == null || charSet == "")
charSet = webCharSet;
if (charSet != null && charSet != "" && Encoding.GetEncoding(charSet) != Encoding.Default)
{
strWebData = Encoding.GetEncoding(charSet).GetString(myDataBuffer);
}
else
{
strWebData = Encoding.GetEncoding("utf-8").GetString(myDataBuffer);
}
return strWebData;
}
catch (Exception e) { return ""; }
}
第4种：类似第2种，增加了代理功能
/// <summary>
/// 远程获取数据
/// </summary>
/// <param name="url">url</param>
/// <param name="code">编码</param>
/// <param name="ProxyStr">代理IP，格式：10.20.30.40:8888</param>
/// <returns></returns>
public static string SendUrl(string url, Encoding code, string ProxyStr)
{
string html = string.Empty;
//try
//{
HttpWebRequest WebReques = (HttpWebRequest)HttpWebRequest.Create(url);
WebReques.Method = "GET";
WebReques.Timeout = ;
if (ProxyStr.Length > )
{
WebProxy proxy = new WebProxy(ProxyStr, true);
WebReques.Proxy = proxy;
} HttpWebResponse WebRespon = (HttpWebResponse)WebReques.GetResponse();
if (WebRespon != null)
{
StreamReader sr = new StreamReader(WebRespon.GetResponseStream(), code);
html = sr.ReadToEnd();
sr.Close();
sr.Dispose();
WebRespon.Close();
}
//}
//catch
//{ //}
return html;
}
第5种：gzip
public string SendUrlGZIP(string PageUrl, System.Text.Encoding encode, string ProxyStr)
{
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(PageUrl);
if (ProxyStr.Length > )
{
WebProxy proxy = new WebProxy(ProxyStr, true);
request.Proxy = proxy;
}
request.Headers.Add("Accept-Encoding", "gzip,deflate");
request.AutomaticDecompression = DecompressionMethods.GZip;
//request.AutomaticDecompression = DecompressionMethods.Deflate | DecompressionMethods.GZip;
WebResponse response = request.GetResponse();
Stream resStream = response.GetResponseStream();
Encoding enc = encode;
StreamReader sr = new StreamReader(resStream, enc);
string strHtml = sr.ReadToEnd();
resStream.Close();
sr.Close();
return strHtml;
}