WinInet api 的使用

///////////////////////////////////////////////////////////////////////////////// Windows Internet Function////  1. InternetAttemptConnect(0);//  2. InternetOpen();//  3. InternetConnect();//  4. HttpOpenRequest() / HttpOpenRequestEx() / HttpAddRequestHeaders();//  5. HttpSendRequest() / HttpSendRequestEx();//  6. HttpQueryInfo();//  7. InternetReadFile() / InternetWriteFile();//  8. InternetCloseHandle();//  OR//  1. InternetAttemptConnect(0);//  2. InternetOpen();//  3. InternetOpenUrl();//  4. HttpQueryInfo();//  5. InternetReadFile() / InternetWriteFile();//  6. InternetCloseHandle();#ifndef __WININET_UTIL_H__#define __WININET_UTIL_H__#include <stdio.h>#include <stdlib.h>#include <Windows.h>#include <WinInet.h>#include <atldef.h>#include <atlbase.h> #include <assert.h>#pragma comment(lib, "wininet.lib")//szUrl = _T("http://218.206.177.44:8180/Z3GFilm/clientGate")DWORD WinInet_ConnectServer(LPCTSTR szUrl, TCHAR *szHeaders, HINTERNET *pHConnect){    assert(NULL != szHeaders );    assert(NULL != pHConnect);    BOOL bRet = FALSE;    DWORD dwRet = -1;    if (ERROR_SUCCESS != ::InternetAttemptConnect(0))        return FALSE;    if (!::InternetCheckConnection(szUrl, FLAG_ICC_FORCE_CONNECTION, 0))        return FALSE;    HINTERNET hInternet = NULL;    HINTERNET hConnect = NULL;    hInternet = ::InternetOpen(NULL, INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);    if (NULL != hInternet)    {        hConnect = ::InternetOpenUrl(hInternet, szUrl, szHeaders, -1,                                     INTERNET_FLAG_DONT_CACHE | INTERNET_FLAG_KEEP_CONNECTION |                                     INTERNET_FLAG_RELOAD | INTERNET_FLAG_PRAGMA_NOCACHE, 0);        if (NULL != hConnect)        {            *pHConnect = hConnect;            dwRet = 0;        }    }        return dwRet;}DWORD WinInet_GetStatusCode(HINTERNET hConnect, DWORD *pdwStatusCode){    DWORD dwRet = -1;    // 查询 HTTP 状态    DWORD dwValue, dwNumberOfBytesRead = sizeof(DWORD);    if (::HttpQueryInfo(hConnect, HTTP_QUERY_STATUS_CODE | HTTP_QUERY_FLAG_NUMBER, &dwValue, &dwNumberOfBytesRead, NULL))    {        *pdwStatusCode = dwValue;        dwRet = 0;    }    return dwRet;}// 查询数据大小DWORD WinInet_GetContentLen(HINTERNET hConnect, DWORD *pdwContentLen){    DWORD dwRet = -1;    DWORD dwValue, dwNumberOfBytesRead = sizeof(DWORD);    if (::HttpQueryInfo(hConnect, HTTP_QUERY_CONTENT_LENGTH | HTTP_QUERY_FLAG_NUMBER, &dwValue, &dwNumberOfBytesRead, NULL))    {        *pdwContentLen = dwValue;        dwRet = 0;    }    return dwRet;}DWORD WinInet_GetResponseHeaders(HINTERNET hConnect, TCHAR *szHeaders, DWORD *pdwHeadersLen){    assert(NULL != hConnect);    assert(NULL != szHeaders);    assert(NULL != pdwHeadersLen);    BOOL fResult = FALSE;    DWORD dwHeadersLen = 0;    fResult = ::HttpQueryInfo(hConnect, HTTP_QUERY_RAW_HEADERS_CRLF, NULL, &dwHeadersLen, 0);    if (*pdwHeadersLen <= dwHeadersLen)    {        *pdwHeadersLen = dwHeadersLen+1;        return -1;    }    fResult = ::HttpQueryInfo(hConnect, HTTP_QUERY_RAW_HEADERS_CRLF, szHeaders, &dwHeadersLen, 0);    *pdwHeadersLen = dwHeadersLen;    return dwHeadersLen;}DWORD WinInet_GetResponseBody(HINTERNET hConnect, BYTE *szBody, DWORD *pdwBodyLen){    assert(NULL != hConnect);    assert(NULL != szBody);    assert(NULL != pdwBodyLen);    BOOL bResult = FALSE;    DWORD dwBytesAvailable = 0;    DWORD dwBytesTotalRead = 0;    DWORD dwBytesRead = 0;    while (InternetQueryDataAvailable(hConnect, &dwBytesAvailable, 0, 0))    {                if (*pdwBodyLen <= dwBytesAvailable +1)        {            //the length of buffer to recv is too small            *pdwBodyLen =  dwBytesAvailable +1;            return -1;        }        bResult = InternetReadFile(hConnect, szBody+dwBytesTotalRead,dwBytesAvailable, &dwBytesRead);                if (!bResult)               {                     break;               }                if (dwBytesRead == 0)                          break;  // End of File.           dwBytesTotalRead += dwBytesRead;    }        szBody[dwBytesTotalRead] = '\0';    *pdwBodyLen = dwBytesTotalRead;    return dwBytesTotalRead;    //const int nSize = 8129;    //BYTE pbBuffer[nSize];    //do    //{    //    if (!::InternetReadFile(hConnect, &pbBuffer, nSize, &dwNumberOfBytesRead))    //        __leave;    //    if (dwNumberOfBytesRead != 0)    //    {    //        // do something ... ...    //        pbBuffer[dwNumberOfBytesRead] = '\0';    //    }    //}    //while (dwNumberOfBytesRead != 0);}DWORD WinInet_CloseHandles(HINTERNET hInternet, HINSTANCE hConnect){    if (NULL != hConnect)    {      ::InternetCloseHandle(hConnect);    }    if ( NULL !=hInternet)    {      ::InternetCloseHandle(hInternet);    }    return 0;}void WinInet_DemoTestFunc(){    DWORD dwErr = -1;    BOOL bRet = FALSE;    HINTERNET hOpen = ::InternetOpen(NULL, INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);    HINTERNET hConnectHandle = ::InternetConnect(hOpen, _T("192.168.10.154"), 8180, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 0);    dwErr = ::GetLastError();//返回0    DWORD dwFlag = INTERNET_FLAG_KEEP_CONNECTION | INTERNET_FLAG_NO_AUTO_REDIRECT | INTERNET_FLAG_NO_CACHE_WRITE | INTERNET_FLAG_NO_COOKIES;    HINTERNET hOpenRequestHandle = ::HttpOpenRequest(hConnectHandle, NULL, NULL, NULL, NULL, NULL, dwFlag, 0);    TCHAR szHeaders[] = _T("message: unusedticketselectrequest\r\nContent-Length: 0\r\nToken: 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");    LPCTSTR lpHeader =  _T("GET /img/baidu_sylogo1.gif /HTTP/1.1")_T("Referer: http://www.baidu.com/");    DWORD dwLen = _tcslen(lpHeader);    bRet = ::HttpAddRequestHeaders(hOpenRequestHandle, lpHeader, dwLen, HTTP_ADDREQ_FLAG_REPLACE|HTTP_ADDREQ_FLAG_ADD);//返回1    bRet = ::HttpSendRequest(hOpenRequestHandle, NULL, 0, NULL, 0);//返回1    TCHAR szBuffer[2048];    DWORD  dwNumberOfBytesRead = _countof(szBuffer);    bRet = ::HttpQueryInfo(hConnectHandle, HTTP_QUERY_RAW_HEADERS_CRLF, szBuffer, &dwNumberOfBytesRead, 0);    ::InternetCloseHandle(hOpenRequestHandle);    ::InternetCloseHandle(hConnectHandle);    ::InternetCloseHandle(hOpen);}#endif