请教下C#封装Wininet，HttpQueryInfo 返回false ，拿不到Cookie，谢谢！

[K_zgklc_O]

先上代码：

namespace HttpHelper
{
    class Wininet
    {
        public const uint INTERNET_OPEN_TYPE_GATEWAY = 2;
        public const uint INTERNET_FLAG_KEEP_CONNECTION = 0x400000;
        public const uint INTERNET_FLAG_NO_CACHE_WRITE = 0x4000000;
        public const uint INTERNET_FLAG_RELOAD = 0x80000000;

        public const uint HTTP_ADDREQ_FLAG_ADD_IF_NEW = 0x10000000;
        public const uint HTTP_ADDREQ_FLAG_ADD = 0x20000000;
        public const uint HTTP_ADDREQ_FLAG_REPLACE = 0x80000000;
        public const string HTTP_VERSION = "HTTP/1.1";

        const int INTERNET_OPEN_TYPE_PROXY = 3;	// via named proxy
        const int INTERNET_OPEN_TYPE_PRECONFIG_WITH_NO_AUTOPROXY = 4; // prevent using java/script/INS

        public const uint INTERNET_FLAG_NO_COOKIES = 0x00080000;  // no automatic cookie handling
        // #define INTERNET_OPEN_TYPE_DIRECT                       1 
        public const int INTERNET_OPEN_TYPE_DIRECT = 1;

        //#define INTERNET_OPEN_TYPE_PRECONFIG                    0
        public const int INTERNET_OPEN_TYPE_PRECONFIG = 0;
        // #define INTERNET_SERVICE_HTTP   3
        public const int INTERNET_SERVICE_HTTP = 3;

        // #define INTERNET_FLAG_SECURE            0x00800000 
        public const int INTERNET_FLAG_SECURE = 0x00800000;

        // #define INTERNET_OPTION_SECURITY_CERTIFICATE    35
        public const int INTERNET_OPTION_SECURITY_CERTIFICATE = 35;

       public const int HTTP_QUERY_SET_COOKIE=43;
       public const int HTTP_QUERY_COOKIE = 44;
        public const int INTERNET_OPTION_HTTP_DECODING = 65;
        // #define INTERNET_ERROR_MASK_COMBINED_SEC_CERT       0x2
        public const ulong INTERNET_ERROR_MASK_COMBINED_SEC_CERT = 0x2;
        [DllImport("wininet.dll", SetLastError = true, CharSet = CharSet.Auto)]
        static extern IntPtr InternetOpen(string lpszAgent, int dwAccessType, string lpszProxyName, string lpszProxyBypass, int dwFlags);

        [DllImport("wininet.dll", SetLastError = true, CharSet = CharSet.Auto)]
        public static extern IntPtr InternetConnect(IntPtr ulSession, string strServer, uint ulPort, string strUser, string strPassword, uint ulService, uint ulFlags, uint ulContext);

        [DllImport("wininet.dll", SetLastError = true, CharSet = CharSet.Auto)]
        public static extern bool InternetGetConnectedState(ref uint ulFlags, uint ulReserved);

        [DllImport("wininet.dll", SetLastError = true, CharSet = CharSet.Auto)]
        public static extern bool InternetCloseHandle(IntPtr ulSession);

        [DllImport("wininet.dll", SetLastError = true, CharSet = CharSet.Auto)]
        public static extern bool HttpAddRequestHeaders(IntPtr hRequest, String szHeasers, UInt32 headersLen, UInt32 modifiers);

        [DllImport("wininet.dll", SetLastError = true, CharSet = CharSet.Auto)]
        public static extern IntPtr HttpOpenRequest(IntPtr hConnect, string szVerb, string szURI, string szHttpVersion, string szReferer, StringBuilder accetpType, uint dwflags, int dwcontext);

        [DllImport("wininet.dll", SetLastError = true, CharSet = System.Runtime.InteropServices.CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern bool HttpSendRequest(IntPtr hRequest, String szHeaders, UInt32 headersLen, Byte[] options, UInt32 optionsLen);

        [DllImport("wininet.dll", SetLastError = true, CharSet = System.Runtime.InteropServices.CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern bool InternetWriteFile(IntPtr hRequest, String szHeaders, UInt32 headersLen, UInt32 options, UInt32 optionsLen);
        [DllImport("wininet.dll", SetLastError = true, CharSet = CharSet.Auto)]
        public static extern bool InternetReadFile(IntPtr hRequest, byte[] pByte, int size, out int revSize);
    
        [DllImport("wininet.dll", CharSet = CharSet.Ansi)]
        public static extern bool HttpQueryInfo(IntPtr hRequest, uint dwInfoLevel,
            ref string lpvBuffer, ref int lpdwBufferLength, ref uint lpdwIndex);        
        //  [DllImport("wininet.dll", SetLastError = true)]
      //  static extern bool HttpQueryInfo(IntPtr hInternet, int dwInfoLevel, ref long lpBuffer, ref long lpdwBufferLength, ref long lpdwIndex);

        [DllImport("wininet.dll", SetLastError = true, CharSet = CharSet.Auto)]
        public extern static bool InternetSetOption
        (
            IntPtr hInternet,
            int dwOption,
            ref ulong lpBuffer,
            int dwBufferLength
        );
        public string UserAngent = "Mozilla/5.0 (Windows NT 5.1; rv:12.0) Gecko/20100101 Firefox/12.0";
        private Dictionary<string, string> headerList = new Dictionary<string, string>();
        public void AddHeader(string header, string value)
        {
            headerList.Add(header, value);
        }

        private static string GetCookieString(string url)
        {
            uint datasize = 1024;
            StringBuilder cookieData = new StringBuilder((int)datasize);
            if (!InternetGetCookieEx(url, null, cookieData, ref datasize, 0x2000, IntPtr.Zero))
            {
                if (datasize < 0)
                    return null;
                cookieData = new StringBuilder((int)datasize);
                if (!InternetGetCookieEx(url, null, cookieData, ref datasize, 0x00002000, IntPtr.Zero))
                    return null;
            }
            return cookieData.ToString();
        }

        public  string GetData(string url, string Cookie, bool IsSend, string HtmlEncoding="utf-8" ,string PostData = "", string ReferUrl = "",string UserAngent="")
        {
            try
            {
                Uri uri = new Uri(url);
                string strProxy = "";
                string strProxyBypass = "";
                IntPtr hSession = InternetOpen("asdf\0", INTERNET_OPEN_TYPE_PRECONFIG, strProxy, strProxyBypass, 0);
                IntPtr hConnect = InternetConnect(hSession,
                    uri.Host,
                    (uint)uri.Port,
                    null,
                    null,
                    INTERNET_SERVICE_HTTP,
                    INTERNET_FLAG_KEEP_CONNECTION | INTERNET_FLAG_NO_CACHE_WRITE,
                    0);
                ulong ulOptionMask = 0;
                int dwBufferLength = 0;
                IntPtr lpBuffer = IntPtr.Zero;
                ulOptionMask = INTERNET_ERROR_MASK_COMBINED_SEC_CERT;
                dwBufferLength = Marshal.SizeOf(lpBuffer);
                bool bResult = InternetSetOption(hConnect, INTERNET_OPTION_HTTP_DECODING, ref ulOptionMask, dwBufferLength);
                IntPtr hRequest = IntPtr.Zero;
                string SendMethod = "GET";
                if (IsSend)
                    SendMethod = "POST";              
                hRequest = HttpOpenRequest(hConnect,
                SendMethod,
                uri.PathAndQuery,
                HTTP_VERSION,
                null,
                null,
                ((url.StartsWith("https")? (INTERNET_FLAG_SECURE | INTERNET_FLAG_NO_COOKIES | INTERNET_FLAG_RELOAD | INTERNET_FLAG_NO_CACHE_WRITE):(INTERNET_FLAG_NO_COOKIES | INTERNET_FLAG_RELOAD | INTERNET_FLAG_NO_CACHE_WRITE))),
                0);
          
                String HEADER = "";
                HEADER ="User-Agent: " + UserAngent + "\r\n" +
                    "Accept: */*\r\nAccept-Language: zh-CN,zh;q=0.8\r\nContent-Type: application/x-www-form-urlencoded\r\n" +
                     (string.IsNullOrEmpty(ReferUrl) ? "" : ("Referer: " + ReferUrl + "\r\n"))
                      + "Accept-Encoding: gzip\r\n" + (string.IsNullOrEmpty(Cookie) ? "" : ("Cookie:" + Cookie));           
                UInt32 HEADLEN = (UInt32)HEADER.Length;
                HttpAddRequestHeaders(hRequest, HEADER, HEADLEN, HTTP_ADDREQ_FLAG_ADD);
                bool nRetsult = false;   //HttpSendRequest(hRequest,NULL,0,NULL,0)                 
                Byte[] SendData = System.Text.Encoding.ASCII.GetBytes(PostData);
                nRetsult = HttpSendRequest(hRequest, "", 0, SendData, (UInt32)SendData.Length);

                string refstr = string.Empty;
                int bufferlenth=0;
                uint a = 0;
                bool aflag=   HttpQueryInfo(hRequest, HTTP_QUERY_COOKIE, ref refstr, ref bufferlenth, ref a);

                int bufferSize = 1024;
                int revSize = 0;
                byte[] bytes = new byte[bufferSize];
                MemoryStream ms = new MemoryStream();
                while (true)
                {
                    bool readResult = InternetReadFile(hRequest, bytes, bufferSize, out revSize);
                    if (readResult && revSize > 0)
                    {
                        ms.Write(bytes, 0, revSize);
                    }
                    else
                    {
                        break;
                    }
                }
                bool result1 = InternetCloseHandle(hRequest);
                bool result2 = InternetCloseHandle(hConnect);
                bool result3 = InternetCloseHandle(hSession);
                return Encoding.GetEncoding(HtmlEncoding).GetString(ms.ToArray());
            }
            catch (System.Exception)
            {
                return "";
            }
        }
    }
}

代码中：
public const int HTTP_QUERY_COOKIE = 44;
[DllImport("wininet.dll", CharSet = CharSet.Ansi)]
public static extern bool HttpQueryInfo(IntPtr hRequest, uint dwInfoLevel, ref string lpvBuffer, ref int lpdwBufferLength, ref uint lpdwIndex);


调用测试：

string refstr = string.Empty;
int bufferlenth=0;
uint a = 0;
bool aflag= HttpQueryInfo(hRequest, HTTP_QUERY_COOKIE, ref refstr, ref bufferlenth, ref a);
返回 false，取不到Cookie，麻烦大神帮我看下，谢谢！万分感谢，这个问题困扰我许久~~~

[xdashewan]

bufferlenth别设置0，这个参数是数据缓冲区的长度，你缓冲区是0不就没地方存结果了嘛

[K_zgklc_O]

引用 1 楼 xdashewan 的回复:

bufferlenth别设置0，这个参数是数据缓冲区的长度，你缓冲区是0不就没地方存结果了嘛

这里都弄过，不是这个问题~~ 设置1024 也仍然返回 false

[K_zgklc_O]

另外说下，我这个类，可以直接使用，麻烦诸神有空的话，可以调试一下~ 谢谢！急~~

[xdashewan]

用65536试

[K_zgklc_O]

引用 4 楼 xdashewan 的回复:

用65536试

谢谢，但还是不行，仍然返回false

[xdashewan]

你确认下InternetGetCookieEx是否拿到cookie，没拿到也可能不会发

[K_zgklc_O]

引用 6 楼 xdashewan 的回复:

你确认下InternetGetCookieEx是否拿到cookie，没拿到也可能不会发

 private static string GetCookieString(string url)
        {
            uint datasize = 1024;
            StringBuilder cookieData = new StringBuilder((int)datasize);
            if (!InternetGetCookieEx(url, null, cookieData, ref datasize, 0x2000, IntPtr.Zero))
            {
                if (datasize < 0)
                    return null;
                cookieData = new StringBuilder((int)datasize);
                if (!InternetGetCookieEx(url, null, cookieData, ref datasize, 0x00002000, IntPtr.Zero))
                    return null;
            }
            return cookieData.ToString();
        }

这段代码 就是用InternetGetCookieEx拿Cookie，但是也拿不到！

[xdashewan]

引用 7 楼 zgklc123 的回复:

这段代码 就是用InternetGetCookieEx拿Cookie，但是也拿不到！

确认response里有没cookie，没有肯定取不到

[K_zgklc_O]

引用 8 楼 xdashewan 的回复:

[quote=引用 7 楼 zgklc123 的回复:] 这段代码 就是用InternetGetCookieEx拿Cookie，但是也拿不到！

确认response里有没cookie，没有肯定取不到[/quote] 但是，Fiddler抓包返回Header的确显示有Cookie字段~

[xdashewan]

后面request无法获得cookie原因还是InternetGetCookieEx没有取得cookie，按照msdn的说法InternetGetCookieEx返回false时If the function fails, it returns FALSE. To get a specific error value, call GetLastError.你获取下error看看

[K_zgklc_O]

引用 10 楼 xdashewan 的回复:

后面request无法获得cookie原因还是InternetGetCookieEx没有取得cookie，按照msdn的说法InternetGetCookieEx返回false时If the function fails, it returns FALSE. To get a specific error value, call GetLastError.你获取下error看看

GetLastError 这个我也试过，只是这个也返回false，我都无语了

[K_zgklc_O]

引用 10 楼 xdashewan 的回复:

后面request无法获得cookie原因还是InternetGetCookieEx没有取得cookie，按照msdn的说法InternetGetCookieEx返回false时If the function fails, it returns FALSE. To get a specific error value, call GetLastError.你获取下error看看

麻烦您，能否帮我调试一下？ 非常感谢~~

[K_zgklc_O]

[wugui555]

请问楼主解决问题没有？我也是遇到这个问题。使用HttpQueryInfo无法获取head头

[K_zgklc_O]

引用 13 楼 zgklc123 的回复:

没有，不知道你现在解决没有？

[K_zgklc_O]

引用 14 楼 wugui555 的回复:

请问楼主解决问题没有？我也是遇到这个问题。使用HttpQueryInfo无法获取head头

没有，不知道你现在解决没有？