WinInet编程(学习)

 客户端从HTTP服务器下载相应的MP3文件的核心代码(HTTP中的GET方法):#include <Windows.h>#include <wininet.h>#pragma comment(lib, "wininet.lib")#define URL_STRING_TEST "http://eng.edu-edu.com.cn/audio/Onelove.mp3"void main(){    URL_COMPONENTS crackedURL;    TCHAR szBuffer[1024];//这里是下载缓冲区大小 1KB大小缓冲写入一次    TCHAR szHostName[128];    TCHAR szUrlPath[256];    ZeroMemory(&crackedURL, sizeof (URL_COMPONENTS));    crackedURL.dwStructSize = sizeof (URL_COMPONENTS);    crackedURL.lpszHostName = szHostName;    crackedURL.dwHostNameLength = sizeof(szHostName);    crackedURL.lpszUrlPath = szUrlPath;    crackedURL.dwUrlPathLength = sizeof(szUrlPath);    InternetCrackUrl(URL_STRING_TEST,(DWORD)strlen(URL_STRING_TEST),0,&crackedURL);    FILE* file = fopen("Onelove.mp3", "wb");    HINTERNET hInt,hConn,hReq;    //启用HTTP协议    hInt = InternetOpen("Microsoft Internet Explorer", INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0);    //建立HTTP连接    hConn = InternetConnect(hInt,crackedURL.lpszHostName,crackedURL.nPort,NULL,NULL,INTERNET_SERVICE_HTTP,0,0);    //创建一个URL请求    hReq = HttpOpenRequest(hConn, "GET", crackedURL.lpszUrlPath, NULL, "", NULL, 0, 0);    char buff[64];    DWORD dwContLen = 0;    DWORD dwLen;    BOOL bResult = FALSE;    DWORD nBytesGet = 0;    BOOL bEnd = FALSE;    DWORD dwRetCode = 0;    DWORD dwSizeOfRq = sizeof(DWORD);    dwSizeOfRq = sizeof(buff);    if (HttpSendRequest(hReq,NULL,0,NULL,0)        && HttpQueryInfo(hReq, HTTP_QUERY_STATUS_CODE|HTTP_QUERY_FLAG_NUMBER, &dwRetCode, &dwSizeOfRq, NULL)        && dwRetCode < 400)    {        bResult = TRUE;//true;    }    //查询文件大小    if (HttpQueryInfo(hReq, HTTP_QUERY_CONTENT_LENGTH, &buff, &dwSizeOfRq, NULL))        dwContLen = atol(buff);    INTERNET_BUFFERS BufferIn;    BufferIn.dwStructSize = sizeof( INTERNET_BUFFERS ); // Must be set or error will occur    BufferIn.Next = NULL;    BufferIn.lpcszHeader = strHeader.c_str(); // 请求头    BufferIn.dwHeadersLength = strHeader.length();    BufferIn.dwHeadersTotal = 0;    BufferIn.lpvBuffer = NULL;    BufferIn.dwBufferLength = 0;    BufferIn.dwBufferTotal = 1024; // This is the only member used other than dwStructSize    BufferIn.dwOffsetLow = 0;    BufferIn.dwOffsetHigh = 0;    */      hReq = HttpOpenRequest(hConn, "GET", crackedURL.lpszUrlPath, NULL, "", NULL, 0, 0);    if (HttpSendRequest(hReq,NULL,0,NULL,0)        && HttpQueryInfo(hReq, HTTP_QUERY_STATUS_CODE|HTTP_QUERY_FLAG_NUMBER, &dwRetCode, &dwSizeOfRq, NULL)        && dwRetCode < 400)    {        bResult = TRUE;//true;    }    bool bTrue = HttpSendRequestExA(hReq,&BufferIn,NULL,NULL,0);    while(TRUE)    {        if (bResult)        {            //开始读取文件            bResult = InternetReadFile(hReq, szBuffer, sizeof(szBuffer), &dwLen);            if (bResult)            {                cout<<"reading ... "<<(nBytesGet*100/dwContLen)<<endl;                nBytesGet += dwLen;                if (dwLen == 0)                {                    bEnd = TRUE;                    break;                }                fwrite(szBuffer, 1, dwLen, file);            }        }        else //数据接受完毕        {            break;        }    }    fclose(file);}===================================================POST方法上传数据(大量)#include #include #include BOOL UseHttpSendReqEx(HINTERNET hRequest, DWORD dwPostSize);#define BUFFSIZE 500void main( int argc, char **argv ){    DWORD dwPostSize;    if (argc < 4)    {        printf("Usage: Bigpost \n");        printf(" is the number of KB to POST\n");        printf(" is the server to POST to\n");        printf(" is the virtual path to POST to\n");        exit(0);    }    if ( ((dwPostSize = strtoul(argv[1],NULL,10)) == 0) || (dwPostSize >=) )    {        printf("%s is invalid size. Valid sizes are from 1 to 2047999\n",[1]);        exit(0);    }    printf( "Test of POSTing %luKB with WinInet\n", dwPostSize);    dwPostSize *= 1024; // Convert KB to bytes    HINTERNET hSession = InternetOpen( "HttpSendRequestEx",,        NULL, NULL, 0);    if(!hSession)    {        printf("Failed to open session\n");        exit(0);    }    HINTERNET hConnect = InternetConnect(hSession, argv[2],,        NULL, NULL, INTERNET_SERVICE_HTTP,NULL, NULL);    if (!hConnect)        printf( "Failed to connect\n" );    else    {        HINTERNET hRequest = HttpOpenRequest(hConnect, "POST", argv[3],            NULL, NULL, NULL, INTERNET_FLAG_NO_CACHE_WRITE, 0);        if (!hRequest)            printf( "Failed to open request handle\n" );        else        {            if(UseHttpSendReqEx(hRequest, dwPostSize))            {                    char pcBuffer[BUFFSIZE];                DWORD dwBytesRead;                printf("\nThe following was returned by the server:\n");                do                {    dwBytesRead=0;                    if(InternetReadFile(hRequest, pcBuffer, BUFFSIZE-1,&dwBytesRead))                    {                        pcBuffer[dwBytesRead]=0x00; // Null-terminate buffer                        printf("%s", pcBuffer);                    }                    else                        printf("\nInternetReadFile failed");                }while(dwBytesRead>0);                printf("\n");            }            if (!InternetCloseHandle(hRequest))                printf( "Failed to close Request handle\n" );        }        if(!InternetCloseHandle(hConnect))            printf("Failed to close Connect handle\n");    }    if( InternetCloseHandle( hSession ) == FALSE )        printf( "Failed to close Session handle\n" );    printf( "\nFinished.\n" );}BOOL UseHttpSendReqEx(HINTERNET hRequest, DWORD dwPostSize){    INTERNET_BUFFERS BufferIn;    DWORD dwBytesWritten;    int n;    BYTE pBuffer[1024];    BOOL bRet;    BufferIn.dwStructSize = sizeof( INTERNET_BUFFERS ); // Must be set or error will occur    BufferIn.Next = NULL;    BufferIn.lpcszHeader = NULL;    BufferIn.dwHeadersLength = 0;    BufferIn.dwHeadersTotal = 0;    BufferIn.lpvBuffer = NULL;    BufferIn.dwBufferLength = 0;    BufferIn.dwBufferTotal = dwPostSize; // This is the only member used other than dwStructSize    BufferIn.dwOffsetLow = 0;    BufferIn.dwOffsetHigh = 0;    if(!HttpSendRequestEx( hRequest, &BufferIn, NULL, 0, 0))    {        printf( "Error on HttpSendRequestEx %d\n",GetLastError() );        return FALSE;    }    FillMemory(pBuffer, 1024, 'D'); // Fill buffer with data    bRet=TRUE;    for(n=1; n<=(int)dwPostSize/1024 && bRet; n++)    {        if(bRet=InternetWriteFile( hRequest, pBuffer, 1024, &dwBytesWritten))            printf( "\r%d bytes sent.", n*1024);    }            if(!bRet)    {        printf( "\nError on InternetWriteFile %lu\n",GetLastError() );        return FALSE;    }    if(!HttpEndRequest(hRequest, NULL, 0, 0))    {        printf( "Error on HttpEndRequest %lu \n", GetLastError());        return FALSE;    }    return TRUE;}====================================================HTTP服务器：一般都是socket异步多线程(解析相应的HTTP协议，然后按照用户的命令(GET,POST,CGI))进行相应的处理LAMP(Linux,apache,mysql,php)http://baike.baidu.com/view/365086.htm?fr=ala0_1_1