MFC如何实现这个功能呢？

我记得MFC有一个HTTP的类啊.或者你不怕麻烦:
http://topic.csdn.net/u/20100107/18/2018bff7-20fb-4b55-a09f-9a431d754a5a.html
#if !defined(AFX_HTTPSOCKET_H__F49A8F82_A933_41A8_AF47_68FBCAC4ADA6__INCLUDED_)
#define AFX_HTTPSOCKET_H__F49A8F82_A933_41A8_AF47_68FBCAC4ADA6__INCLUDED_#include <afxinet.h>#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
class CHttpSocket
{
public:
CHttpSocket();
virtual ~CHttpSocket();
int    GetServerState();//返回服务器状态码 -1表示不成功
int    GetField(const char* szSession,char *szValue,int nMaxLength);//返回某个域值,-1表示不成功
int    GetResponseLine(char *pLine,int nMaxLength);//获取返回头的一行
const char*    GetResponseHeader(int &Length);//获取完整的返回头
const char *FormatRequestHeader(char *pServer,char *pObject,long &Length,
char* pCookie=NULL,char *pReferer=NULL,
long nFrom=0,long nTo=0,
int nServerType=0);//格式化请求头
int    GetRequestHeader(char *pHeader,int nMaxLength) const;
BOOL SendRequest(const char* pRequestHeader = NULL,long Length = 0);
BOOL SetTimeout(int nTime,int nType=0);
long Receive(char* pBuffer,long nMaxLength);
BOOL Connect(char* szHostName,int nPort=80);
BOOL Socket();
BOOL CloseSocket();
protected:
char m_requestheader[1024];        //请求头
char m_ResponseHeader[1024];    //回应头
int m_port;                        //端口
char m_ipaddr[256];                //IP地址
BOOL m_bConnected;
SOCKET m_s;
hostent *m_phostent; int m_nCurIndex;                //GetResponsLine()函数的游标记录
BOOL m_bResponsed;                //是否已经取得了返回头
int m_nResponseHeaderSize;        //回应头的大小
};#endif // !defined(AFX_HTTPSOCKET_H__F49A8F82_A933_41A8_AF47_68FBCAC4ADA6__INCLUDED_)//////////////////////////////////////////////////////////
// HttpSocket.cpp: implementation of the CHttpSocket class.
//
//////////////////////////////////////////////////////////////////////#include "stdafx.h"
#include "HttpSocket.h"#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif#define MAXHEADERSIZE 1024
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CHttpSocket::CHttpSocket()
{
m_s=NULL;
m_phostent=NULL;
m_port=80;
m_bConnected=FALSE;
for(int i=0;i<256;i++)
m_ipaddr[i]='\0';
memset(m_requestheader,0,MAXHEADERSIZE);
memset(m_ResponseHeader,0,MAXHEADERSIZE);
m_nCurIndex = 0;        //
m_bResponsed = FALSE;
m_nResponseHeaderSize = -1;
}CHttpSocket::~CHttpSocket()
{
CloseSocket();
}BOOL CHttpSocket::Socket()
{
if(m_bConnected)return FALSE; struct protoent *ppe;
ppe=getprotobyname("tcp"); ///创建SOCKET对象
m_s=socket(PF_INET,SOCK_STREAM,ppe->p_proto);
if(m_s==INVALID_SOCKET)
{
TRACE("socket()函数执行失败!\n");
return FALSE;
} return TRUE;}BOOL CHttpSocket::Connect(char *szHostName,int nPort)
{
if(szHostName==NULL)
return FALSE; ///若已经连接,则先关闭
if(m_bConnected)
{
CloseSocket();
} ///保存端口号
m_port=nPort; ///根据主机名获得IP地址
m_phostent=gethostbyname(szHostName);
if(m_phostent==NULL)
{
TRACE("gethostbyname()函数执行失败!\n");
return FALSE;
}
///连接
struct in_addr ip_addr;
memcpy(&ip_addr,m_phostent->h_addr_list[0],4);///h_addr_list[0]里4个字节,每个字节8位 struct sockaddr_in destaddr;
memset((void *)&destaddr,0,sizeof(destaddr));
destaddr.sin_family=AF_INET;
destaddr.sin_port=htons(80);
destaddr.sin_addr=ip_addr; ///保存主机的IP地址字符串
sprintf(m_ipaddr,"%d.%d.%d.%d",
destaddr.sin_addr.S_un.S_un_b.s_b1,
destaddr.sin_addr.S_un.S_un_b.s_b2,
destaddr.sin_addr.S_un.S_un_b.s_b3,
destaddr.sin_addr.S_un.S_un_b.s_b4); if(connect(m_s,(struct sockaddr*)&destaddr,sizeof(destaddr))!=0)
{
//    TRACE(NULL,"connect()函数执行失败!","错误",MB_OK);
return FALSE;
}
///设置已经连接的标志
m_bConnected=TRUE;
return TRUE;
}///根据请求的相对URL输出HTTP请求头
const char *CHttpSocket::FormatRequestHeader(char *pServer,char *pObject, long &Length,
char *pCookie,char *pReferer,long nFrom,
long nTo,int nServerType)
{
char szPort[10];
char szTemp[20];
sprintf(szPort,"%d",m_port);
memset(m_requestheader,'\0',1024); ///第1行:方法,请求的路径,版本
strcat(m_requestheader,"GET ");
strcat(m_requestheader,pObject);
strcat(m_requestheader," HTTP/1.1");
strcat(m_requestheader,"\r\n"); ///第2行:主机
strcat(m_requestheader,"Host:");
strcat(m_requestheader,pServer);
strcat(m_requestheader,"\r\n"); ///第3行:
if(pReferer != NULL)
{
strcat(m_requestheader,"Referer:");
strcat(m_requestheader,pReferer);
strcat(m_requestheader,"\r\n");
} ///第4行:接收的数据类型
strcat(m_requestheader,"Accept:*/*");
strcat(m_requestheader,"\r\n"); ///第5行:浏览器类型
strcat(m_requestheader,"User-Agent:Mozilla/4.0 (compatible; MSIE 5.00; Windows 98)");
strcat(m_requestheader,"\r\n"); ///第6行:连接设置,保持
strcat(m_requestheader,"Connection:Keep-Alive");
strcat(m_requestheader,"\r\n"); ///第7行:Cookie.
if(pCookie != NULL)
{
strcat(m_requestheader,"Set Cookie:0");
strcat(m_requestheader,pCookie);
strcat(m_requestheader,"\r\n");
} ///第8行:请求的数据起始字节位置(断点续传的关键)
if(nFrom > 0)
{
strcat(m_requestheader,"Range: bytes=");
_ltoa(nFrom,szTemp,10);
strcat(m_requestheader,szTemp);
strcat(m_requestheader,"-");
if(nTo > nFrom)
{
_ltoa(nTo,szTemp,10);
strcat(m_requestheader,szTemp);
}
strcat(m_requestheader,"\r\n");
} ///最后一行:空行
strcat(m_requestheader,"\r\n"); ///返回结果
Length=strlen(m_requestheader);
return m_requestheader;
}///发送请求头
BOOL CHttpSocket::SendRequest(const char *pRequestHeader, long Length)
{
if(!m_bConnected)return FALSE; if(pRequestHeader==NULL)
pRequestHeader=m_requestheader;
if(Length==0)
Length=strlen(m_requestheader); if(send(m_s,pRequestHeader,Length,0)==SOCKET_ERROR)
{
TRACE("send()函数执行失败!\n");
return FALSE;
}
int nLength;
GetResponseHeader(nLength);
return TRUE;
}long CHttpSocket::Receive(char* pBuffer,long nMaxLength)
{
if(!m_bConnected)return NULL; ///接收数据
long nLength;
nLength=recv(m_s,pBuffer,nMaxLength,0); if(nLength <= 0)
{
//MessageBox(NULL,"recv()函数执行失败!","错误",MB_OK);
CloseSocket();
}
return nLength;
}///关闭套接字
BOOL CHttpSocket::CloseSocket()
{
if(m_s != NULL)
{
if(closesocket(m_s)==SOCKET_ERROR)
{
TRACE("closesocket()函数执行失败!\n");
return FALSE;
}
}
m_s = NULL;
m_bConnected=FALSE;
return TRUE;
}int CHttpSocket::GetRequestHeader(char *pHeader, int nMaxLength) const
{
int nLength;
if(int(strlen(m_requestheader))>nMaxLength)
{
nLength=nMaxLength;
}
else
{
nLength=strlen(m_requestheader);
}
memcpy(pHeader,m_requestheader,nLength);
return nLength;
}//设置接收或者发送的最长时间
BOOL CHttpSocket::SetTimeout(int nTime, int nType)
{
if(nType == 0)
{
nType = SO_RCVTIMEO;
}
else
{
nType = SO_SNDTIMEO;
} DWORD dwErr;
dwErr=setsockopt(m_s,SOL_SOCKET,nType,(char*)&nTime,sizeof(nTime));
if(dwErr)
{
DWORD a = WSAGetLastError();
TRACE("setsockopt()函数执行失败!\n");
return FALSE;
}
return TRUE;
}//获取HTTP请求的返回头
const char* CHttpSocket::GetResponseHeader(int &nLength)
{
if(!m_bResponsed)
{
char c = 0;
int nIndex = 0;
BOOL bEndResponse = FALSE;
while(!bEndResponse && nIndex < MAXHEADERSIZE)
{
recv(m_s,&c,1,0);
m_ResponseHeader[nIndex++] = c;
if(nIndex >= 4)
{
if(m_ResponseHeader[nIndex - 4] == '\r' && m_ResponseHeader[nIndex - 3] == '\n'
&& m_ResponseHeader[nIndex - 2] == '\r' && m_ResponseHeader[nIndex - 1] == '\n')
bEndResponse = TRUE;
}
}
m_nResponseHeaderSize = nIndex;
m_bResponsed = TRUE;
} nLength = m_nResponseHeaderSize;
return m_ResponseHeader;
}//返回HTTP响应头中的一行.
int CHttpSocket::GetResponseLine(char *pLine, int nMaxLength)
{
if(m_nCurIndex >= m_nResponseHeaderSize)
{
m_nCurIndex = 0;
return -1;
} int nIndex = 0;
char c = 0;
do
{
c = m_ResponseHeader[m_nCurIndex++];
pLine[nIndex++] = c;
} while(c != '\n' && m_nCurIndex < m_nResponseHeaderSize && nIndex < nMaxLength); return nIndex;
}int CHttpSocket::GetField(const char *szSession, char *szValue, int nMaxLength)
{
//取得某个域值
if(!m_bResponsed) return -1; CString strRespons;
strRespons = m_ResponseHeader;
int nPos = -1;
nPos = strRespons.Find(szSession,0);
if(nPos != -1)
{
nPos += strlen(szSession);
nPos += 2;
int nCr = strRespons.Find("\r\n",nPos);
CString strValue = strRespons.Mid(nPos,nCr - nPos);
strcpy(szValue,strValue);
return (nCr - nPos);
}
else
{
return -1;
}
}int CHttpSocket::GetServerState()
{
//若没有取得响应头,返回失败
if(!m_bResponsed) return -1; char szState[3];
szState[0] = m_ResponseHeader[9];
szState[1] = m_ResponseHeader[10];
szState[2] = m_ResponseHeader[11]; return atoi(szState);
}

调试易

MFC如何实现这个功能呢？

解决方案 »