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【Asp.Net】请求地址返回页面源代码

作者:Dezai.CN / 发布于2012/12/12/ 507

public static string GETHTMLCode(string url, string refer, string method, string param) 
    { 
        HttpWebResponse res = null;
        StreamReader sr = null; 
        try 
        { 
            Uri uri = new Uri(url); 
            HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
            CookieContainer container = new CookieContainer();
            req.Accept = "*/*"; 
            req.UserAgent = "Mozilla/4.0.(compatible;.MSIE.7.0;.Windows.NT.5.2; .NET.CLR.1.1.4322)";
            req.CookieContainer = container;
            req.CookieContainer.SetCookies(uri, req.CookieContainer.GetCookieHeader(uri));
            req.Method = method; req.KeepAlive = true; req.Headers.Add("Accept-Language", "zh-cn"); 
            req.Headers.Add("Accept-Encoding", "gzip,   deflate"); req.Headers.Add("UA-cpu", "x86"); 
            req.Referer = refer; if (method.Trim().ToLower() == "post") 
            { 
                req.ContentType = "application/x-www-form-urlencoded"; 
                byte[] bs = System.Text.Encoding.Default.GetBytes(param); 
                req.ContentLength = bs.Length;
                Stream stream = req.GetRequestStream(); 
                stream.Write(bs, 0, bs.Length); 
                stream.Close(); 
            } 
            res = (HttpWebResponse)req.GetResponse();
            string cs = res.CharacterSet; 
            Encoding encoding = null; 
            if (!string.IsNullOrEmpty(cs))                     
                encoding = Encoding.GetEncoding(cs); 
            else                     
                encoding = Encoding.UTF8; 
            sr = new StreamReader(res.GetResponseStream(), encoding);
            return 
                sr.ReadToEnd(); 
        } 
        catch (Exception) 
        { 
            return string.Empty; 
            throw; 
        } 
        finally 
        {
            if (res != null)                     
                res.Close(); 
            if (sr != null)   
                sr.Close(); 
        } 
    }

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