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HTTP协议的C写的实例

如果哪有问题请指正, 自己写的不太好.

/* *************************************
*  HttpClient connection Server
*  
* http protocol
 */

#include  < windows.h >
#include  < stdio.h >

#pragma comment(lib,  " ws2_32 " )
 #define  LEN                 1024

/* *********************************
*
*  init_win32 
*
********************************* */
void  init_win32()
 {
    WORD                    wdVersionRequired;
    WSADATA                 wsaData;

    wdVersionRequired  =  MAKEWORD( 2 ,  2 );
    WSAStartup(wdVersionRequired,  & wsaData);
}

SOCKET socket_create(sock)
 {
    sock  =  socket(AF_INET, SOCK_STREAM,  0 );
     if  (SOCKET_ERROR  ==  sock)
     {
         return  FALSE;
    }
     return  sock;

}

/* *********************************
*
*  get remote IP address 
*
********************************* */
char   *  getIP( char   *  get_url)
 {
     int                          WSA_return;
    WSADATA                     WSAData;
     /*  ½á¹¹Ö¸Õë  */  
    HOSTENT  * host_entry;
     char   *                       ip;

    WSA_return = WSAStartup( 0x0101 , & WSAData);

     if (WSA_return == 0 )
     {
         /*  ¼´Òª½âÎöµÄÓòÃû»òÖ÷»úÃû  */
        host_entry = gethostbyname(get_url);
        printf( " %s\n " , get_url);
         if (host_entry != 0 )
         {
           ip  =  inet_ntoa( * ( struct  in_addr  * ) * host_entry -> h_addr_list); 
            printf( " ½âÎöIPµØÖ·:  " );
            printf( " %d.%d.%d.%d " ,
            (host_entry -> h_addr_list[ 0 ][ 0 ] & 0x00ff ),
            (host_entry -> h_addr_list[ 0 ][ 1 ] & 0x00ff ),
            (host_entry -> h_addr_list[ 0 ][ 2 ] & 0x00ff ),
            (host_entry -> h_addr_list[ 0 ][ 3 ] & 0x00ff ));
            return  ip;
        }
    }
    WSACleanup();
     return  NULL;
}

/* *********************************
*
*  socket connect
*
********************************* */
int  sockCon(SOCKET sock, char   *  get_url)
 {
     int                          TimeOut = 5000 ;  // Á¬½Ó³¬Ê±
     int                          ret;
     short                        port = 80 ;
     char   *                       get_ip;
     struct  sockaddr_in      saServer;
    unsigned  long                ul  =   1 ;
    unsigned  long                ul2 = 0 ;
    

    memset( & saServer,  0 ,  sizeof (saServer));
     /*  »ñÈ¡Ô¶³Ì IP  */
    get_ip  =  getIP(get_url);
    saServer.sin_family  =  AF_INET;
    saServer.sin_addr.S_un.S_addr  =  inet_addr(get_ip);
    saServer.sin_port  =  htons(port);
    
     /*  ÉèÖ÷¢Ëͳ¬Ê±6Ãë  */
     if  (setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, ( char * ) & TimeOut,  sizeof ( int )) == SOCKET_ERROR)
     {  
         return  FALSE;
    }

    /*  ½ÓÊÕ³¬Ê±6Ãë  */
     if  (setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, ( char * ) & TimeOut,  sizeof (TimeOut)) == SOCKET_ERROR)
         return  FALSE;
     
     /*  ÉèÖ÷Ç×èÈû·½Ê½Á¬½Ó  */
    ret = ioctlsocket(sock, FIONBIO, (unsigned  long   * ) & ul);

     if  (ret == SOCKET_ERROR)
         return  FALSE;

  if  (connect(sock, ( struct  sockaddr * ) & saServer,  sizeof ( struct  sockaddr))  !=   0 )
     {
         struct  timeval              timeout;
        fd_set                      r;

        FD_ZERO( & r);
        FD_SET(sock,  & r);

        timeout.tv_sec = 10 ;   // Á¬½Ó³¬Ê±15Ãë
        timeout.tv_usec = 0 ;

        ret  =  select(sock + 1 , NULL,  & r, NULL,  & timeout);
        printf( " select: %d\n " , ret);

         if  (ret  <=   0 )
         {
            printf( " connect select timeout!!!\n " );
            closesocket(sock);
             return  FALSE;
        }

          // Ò»°ã·ÇËø¶¨Ä£Ê½Ì׽ӱȽÏÄÑ¿ØÖÆ£¬¿ÉÒÔ¸ù¾Ýʵ¼ÊÇé¿ö¿¼ÂÇ ÔÙÉè»Ø×èÈûģʽ
        ret = ioctlsocket(sock, FIONBIO, (unsigned  long * ) & ul2);
        
         if  (ret == SOCKET_ERROR)
         {
            closesocket(sock);
             return  FALSE;
        }
         else
         {
            printf( " connect server success !\n " );
        }
    }    
     return   0 ;
}

/* *********************************
*
*  socket receiving station
*
********************************* */
int  socket_send(SOCKET sock,  char   *  protocolHead,  int  length)
 {
     if ( 0   ==  send(sock, protocolHead, length,  0 ))   // send server
         return  FALSE;
     return   0 ;
}

/* *********************************
*
*  socket receiving station
*
********************************* */
socket_rv(SOCKET sock,  char   *  recvBuf,  int  rvlength)
 {
    fd_set                      fds_r;
     int                          status;
     struct  timeval              tm  =   { 20 , 7 } ;

    FD_ZERO( & fds_r);
    FD_SET(sock, & fds_r);

    status = select(sock +   1 ,  & fds_r,  0 ,  0 ,  & tm);  // socketIdÔÚÕâÀïÊÇ×î´óµÄfd
     if (status  >   0   &&  FD_ISSET(sock,  & fds_r))
     {
        printf( " Socket is readablefd=[%d]\n " ,sock);
         while ( 1 )
         {
            memset(recvBuf,  0 ,  sizeof (recvBuf));
             if  (recv(sock, recvBuf, rvlength,  0 ) == 0 )
             {
                 break ;
            }
            printf( " \n%s\n " , recvBuf);
        }
    }
     return   0 ;
}

/* *********************************
*
*  socket close
*
********************************* */
sock_close(SOCKET sock)
 {
    WSACleanup();
    closesocket(sock);

}

/* *********************************
*
*  main function
*
********************************* */
int  main()
 {
    SOCKET                      sock  =   0 ;
     int                          rvlength = 4096 ;
     int                          senlenght;
     char   *                       get_url = " www.google.cn " ;
     char                         recvBuf[ 4096 ] = "" ;
     char                         protocolHead[] = " GET www.google.cn HTTP/1.1\r\n "
                                                 " Accept: */*\r\n "
                                                 " Accept-Language: zh-cn,zh; q=0.5\r\n "  
                                                 " User-Agent: EasyAgent/1.01\r\n "
                                                 " Connection: Keep-Alive\r\n "
                                                 " Accept-Encoding: gzip, deflate\r\n "
                                                 " Host: www.google.cn\r\n\r\n " ;  //  ±íʾHTTP ½áÊø·û\r\n\r\n

    senlenght  =   sizeof (protocolHead);
    init_win32();
    sock  =  socket_create(sock);

    sockCon(sock, get_url);
    socket_send(sock, protocolHead, senlenght);
    socket_rv(sock, recvBuf, rvlength);
    
    sock_close(sock);

     return   0 ;
}



posted on 2008-12-18 15:46 向左向右走 阅读(420) 评论(1)  编辑 收藏 引用 所属分类: C/C++学习资料库

评论

# re: HTTP协议的C写的实例 2008-12-18 17:54 戴尔笔记本

挺好的思路，学习  回复  更多评论   

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