C# 处理302后获取COOKIE

 

C# 处理302后获取COOKIE

分类：2011-01-01
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c#string.netexceptioncookiesstream

public static string Login(String url, String paramList, string MyEncode, ref string myCookieContainer,string refer)

{

    HttpWebResponse res = null;

    string strResult = string.Empty; ;

    try

    {

        HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);

        req.Method = "POST";

        req.ContentType = "application/x-www-form-urlencoded";

        req.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET4.0C; .NET4.0E; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)";

        if (!string.IsNullOrEmpty(refer))

        {

            req.Referer = refer;

        }

        req.AllowAutoRedirect = false;

        CookieContainer cookieCon = new CookieContainer();

        req.CookieContainer = cookieCon;

        StringBuilder UrlEncoded = new StringBuilder();

        Char[] reserved = { '?', '=', '&' };

        byte[] SomeBytes = null;

        if (paramList != null)

        {

            int i = 0, j;

            while (i < paramList.Length)

            {

                j = paramList.IndexOfAny(reserved, i);

                if (j == -1)

                {

                    UrlEncoded.Append(HttpUtility.UrlEncode(paramList.Substring(i, paramList.Length - i)));

                    break;

                }

                UrlEncoded.Append(HttpUtility.UrlEncode(paramList.Substring(i, j - i)));

                UrlEncoded.Append(paramList.Substring(j, 1));

                i = j + 1;

            }

            SomeBytes = Encoding.UTF8.GetBytes(UrlEncoded.ToString());

            req.ContentLength = SomeBytes.Length;

            Stream newStream = req.GetRequestStream();

            newStream.Write(SomeBytes, 0, SomeBytes.Length);

            newStream.Close();

        }

        else

        {

            req.ContentLength = 0;

        }

        res = (HttpWebResponse)req.GetResponse();

        //MessageBox.Show(((int)res.StatusCode)+"");

        

        myCookieContainer = req.CookieContainer.GetCookieHeader(new Uri(url));

        if (res.StatusCode == HttpStatusCode.Redirect)

        {

            //MessageBox.Show(res.Headers["Location"]);

            string cookies = res.Headers["Set-Cookie"].Replace(",", "%2c");

            cookies = cookies.Replace("httponly%2c", "");

            //MessageBox.Show(cookies);

            return SendDataByGet(res.Headers["Location"], "", "utf-8", cookies, refer);

        }

        

        Stream ReceiveStream = res.GetResponseStream();

        Encoding encode = System.Text.Encoding.GetEncoding(MyEncode);

        StreamReader sr = new StreamReader(ReceiveStream, encode);

        Char[] read = new Char[256];

        int count = sr.Read(read, 0, 256);

        while (count > 0)

        {

            String str = new String(read, 0, count);

            strResult += str;

            count = sr.Read(read, 0, 256);

        }

    }

    catch (Exception e)

    {

        //MessageBox.Show(e.ToString());

        throw new Exception("Web.Login：/r/n" + e.ToString());

    }

    finally

    {

        if (res != null)

        {

            res.Close();

        }

    }

    return strResult;

}

public static string SendDataByGet(string url, string data, string encode, string cookies, string refer)

{

    string retString = string.Empty;

    HttpWebResponse response = null;

    try

    {

        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url + (data == "" ? "" : "?") + data);

        string host = string.Empty;

        Uri uri = new Uri(url);

        host = uri.Scheme + "://" + uri.Authority + "/";

        CookieContainer cc = new CookieContainer();

        string[] SegCookie = new string[] { };

        SegCookie = cookies.Split(new string[] { ";" }, Strin
4000
gSplitOptions.RemoveEmptyEntries);

        for (int i = 0; i < SegCookie.Length; i++)

        {

            string[] tmp = new string[] { };

            tmp = SegCookie[i].Split(new string[] { "=" }, StringSplitOptions.RemoveEmptyEntries);

            if (tmp.Length == 2)

            {

                Cookie c = new Cookie();

                c.Name = tmp[0].Trim();

                c.Value = tmp[1];

                cc.Add(new Uri(host), c);

            }

        }

        request.CookieContainer = cc;

        request.Method = "GET";

        request.ContentType = "text/html;charset=" + encode;

        request.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET4.0C; .NET4.0E; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)";

        if (!string.IsNullOrEmpty(refer))

        {

            request.Referer = refer;

        }

        else

        {

            request.Referer = url;

        }

        response = (HttpWebResponse)request.GetResponse();

        string abc = string.Empty;

        for (int i = 0; i < response.Headers.Count; i++)

        {

            abc += response.Headers.Keys[i].ToString() + "=====>" + response.Headers[response.Headers.Keys[i].ToString()]+"/r/n";

        }

        //MessageBox.Show(abc);

        Stream myResponseStream = response.GetResponseStream();

        StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding(encode));

        retString = myStreamReader.ReadToEnd();

        myStreamReader.Close();

        myResponseStream.Close();

        request.Abort();

        response.Close();

        return retString;

    }

    catch (Exception ex) { throw new Exception("Web.SendDataByGet：/r/n" + ex.ToString()); }

    finally

    {

        if (response != null)

            response.Close();

    }

}