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用VC++实现http代理

2008-10-7 11:13

<p><strong>用VC++实现http代理</strong><br/></p>如果真的想帮助大家,为什么不说的详细一些?<font color="#000000">&nbsp; &nbsp;   无奈之下,自己去翻RFc文档,找了些资料,写了这个利用http代理来下载文件的资料</font><br/><font color="#000000">&nbsp; &nbsp;   代码如下:</font><br/><font color="#000000">&nbsp; &nbsp;   (1)一些基本变量</font><br/><font color="#000000">&nbsp; &nbsp; SOCKET HTTPSocket; // 主socket<br/>&nbsp; &nbsp; strUCt sockaddr_in SocketAddr; // address socket<br/>&nbsp; &nbsp; struct sockaddr_in BindSocket; // for bind</font><br/><br/><font color="#000000">&nbsp; &nbsp; int m_nRecvtimeout; // recieve timeout<br/>&nbsp; &nbsp; int m_nSendTimeout; // send timeout</font><br/><font color="#000000">&nbsp; &nbsp; WSADATA wsaData;</font><br/><font color="#000000">&nbsp; &nbsp; // 要下载文件部分。好像在BindSocket.sin_addr.s_addr = inet_addr (strHost);时,只能使用ip地址,所以了。。。</font><br/><font color="#000000">&nbsp; &nbsp; // 如果谁知道更好的方法,别忘了告诉我一下。</font><br/><font color="#000000">&nbsp; &nbsp; CString strHost="111.111.111.111 ";<br/>&nbsp; &nbsp; CString DownLoadAddress="http://www.aitenshi.com/bbs/images/";<br/>&nbsp; &nbsp; CString hostFile="logo.gIF";<br/>&nbsp; &nbsp; int HttpPort=80;</font><br/><font color="#000000"></font><br/><font color="#000000">&nbsp; &nbsp;   (2)一些函数,用来取得http头,和获取文件大小</font><br/><font color="#000000">&nbsp; &nbsp; int GetFileLength(char *httpHeader)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; CString strHeader;<br/>&nbsp; &nbsp; int local;<br/>&nbsp; &nbsp; strHeader=(CString)httpHeader;<br/>&nbsp; &nbsp; local=strHeader.Find("Content-Length",0);<br/>&nbsp; &nbsp; local+=16;<br/>&nbsp; &nbsp; strHeader.Delete(0,local);<br/>&nbsp; &nbsp; local=strHeader.Find("\r");<br/>&nbsp; &nbsp; strHeader.SetAt(local,'\0');</font><br/><font color="#000000">&nbsp; &nbsp; char temp[30];<br/>&nbsp; &nbsp; strcpy(temp,strHeader.GetBuffer(strHeader.GetLength()));<br/>&nbsp; &nbsp; return atoi(temp);<br/>&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; int GetHttpHeader(SOCKET sckDest,char *str)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; BOOL m_bResponsed=0;<br/>&nbsp; &nbsp; int m_nResponseHeaderSize;</font><br/><font color="#000000">&nbsp; &nbsp; if(!m_bResponsed)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; char c = 0;<br/>&nbsp; &nbsp; int nIndex = 0;<br/>&nbsp; &nbsp; BOOL bEndResponse = FALSE;<br/>&nbsp; &nbsp; while(!bEndResponse &amp;&amp; nIndex &lt; 1024)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; recv(sckDest,&amp;c,1,0);<br/>&nbsp; &nbsp; str[nIndex++] = c;<br/>&nbsp; &nbsp; if(nIndex &gt;= 4)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; if(str[nIndex - 4] == '\r' &amp;&amp; str[nIndex - 3] == ''<br/>&nbsp; &nbsp; &amp;&amp; str[nIndex - 2] == '\r' &amp;&amp; str[nIndex - 1] == '')<br/>&nbsp; &nbsp; bEndResponse = TRUE;<br/>&nbsp; &nbsp; }<br/>&nbsp; &nbsp; }<br/>&nbsp; &nbsp; m_nResponseHeaderSize = nIndex;<br/>&nbsp; &nbsp; m_bResponsed = TRUE;<br/>&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; return m_nResponseHeaderSize;</font><br/><font color="#000000">&nbsp; &nbsp; }</font><br/><br/><font color="#000000">&nbsp; &nbsp;   (3)用来发送的部分<br/></font><br/><font color="#000000">void szcopy(char* dest,const char* src,int nMaxBytes)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; int i_cntr=0;<br/>&nbsp; &nbsp; while ((src[i_cntr]!='\0')    (i_cntr dest[i_cntr]=src[i_cntr++];<br/>&nbsp; &nbsp; dest[i_cntr]='\0';<br/>&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; BOOL SocketSend(SOCKET sckDest,const char* szHttp)<br/>&nbsp; &nbsp; {</font><br/><font color="#000000">&nbsp; &nbsp; char szSendHeader[MAXHEADERLENGTH];<br/>&nbsp; &nbsp; int iLen=strlen(szHttp);<br/>&nbsp; &nbsp; szcopy(szSendHeader,szHttp,iLen);<br/>&nbsp; &nbsp; if(send (sckDest ,(const char FAR *)szSendHeader ,iLen ,0)==SOCKET_ERROR)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; closesocket(sckDest);<br/>&nbsp; &nbsp; AfxMessageBox("Error when send");<br/>&nbsp; &nbsp; return FALSE;<br/>&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; return TRUE;<br/>&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; BOOL SocketSend(SOCKET sckDest,CString szHttp)<br/>&nbsp; &nbsp; {</font><br/><font color="#000000">&nbsp; &nbsp; int iLen=szHttp.GetLength();<br/>&nbsp; &nbsp; if(send (sckDest,szHttp,iLen,0)==SOCKET_ERROR)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; closesocket(sckDest);<br/>&nbsp; &nbsp; AfxMessageBox("Error when send");<br/>&nbsp; &nbsp; return FALSE;<br/>&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; return TRUE;<br/>&nbsp; &nbsp; }</font><br/><br/><font color="#000000">&nbsp; &nbsp;   (4)用于连接的函数</font><br/><font color="#000000">&nbsp; &nbsp;   这里是做了一些连接用的操作,分了两种情况</font><br/><font color="#000000">&nbsp; &nbsp;   1)如果没有使用代理,则直接连到你指定的计算机</font><br/><font color="#000000">&nbsp; &nbsp;   2)如果使用了代理,则直接连到代理</font><br/><font color="#000000">&nbsp; &nbsp; BOOL CDLAngelDlg::ConnectHttp()<br/>&nbsp; &nbsp; {</font><br/><font color="#000000">&nbsp; &nbsp; message="正在建立连接";</font><br/><br/><font color="#000000">&nbsp; &nbsp; UpdateData(TRUE);<br/>&nbsp; &nbsp; if(m_combo=="HTTP") // m_combo 一个下拉条<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; HTTPSocket=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);<br/>&nbsp; &nbsp; SocketAddr.sin_addr.s_addr = inet_addr (m_ProxyAddr);<br/>&nbsp; &nbsp; SocketAddr.sin_family=AF_INET;<br/>&nbsp; &nbsp; SocketAddr.sin_port=htons(atoi(m_Port));</font><br/><font color="#000000">&nbsp; &nbsp; struct fd_set fdSet;<br/>&nbsp; &nbsp; struct timeval tmvTimeout={0L,0L};</font><br/><font color="#000000">&nbsp; &nbsp; FD_ZERO(&amp;fdSet);<br/>&nbsp; &nbsp; FD_SET(HTTPSocket, &amp;fdSet);</font><br/><font color="#000000">&nbsp; &nbsp; if (select(0,&amp;fdSet,NULL,NULL,&amp;tmvTimeout)==SOCKET_ERROR)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; closesocket(HTTPSocket);<br/>&nbsp; &nbsp; AfxMessageBox("Error when select.");<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }</font><br/><br/><font color="#000000">&nbsp; &nbsp; if (connect(HTTPSocket, (const struct sockaddr *)&amp;SocketAddr, sizeof(SocketAddr))==SOCKET_ERROR)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; message="代理连接失败";<br/>&nbsp; &nbsp; m_message.CleanText();<br/>&nbsp; &nbsp; m_message.AddText(message);<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }</font><br/><br/><font color="#000000">&nbsp; &nbsp; // 发送CONNCET请求令到代理服务器,用于和代理建立连接</font><br/><font color="#000000">&nbsp; &nbsp; //代理服务器的地址和端口放在m_ProxyAddr,m_Port 里面</font><br/><font color="#000000">&nbsp; &nbsp; CString temp;<br/>&nbsp; &nbsp; char tmpBuffer[1024];<br/>&nbsp; &nbsp; temp.Format("CONNECT %s:%s HTTP/1.1\rUser-Agent: MyApp/0.1\r\r",m_ProxyAddr,m_Port);<br/>&nbsp; &nbsp; if(!SocketSend(HTTPSocket,temp))<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; message="连接代理失败";<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; // 取得代理响应,如果连接代理成功,代理服务器将返回200 Connection established</font><br/><font color="#000000">&nbsp; &nbsp; GetHttpHeader(HTTPSocket,tmpBuffer);<br/>&nbsp; &nbsp; temp=tmpBuffer;<br/>&nbsp; &nbsp; if(temp.Find("HTTP/1.0 200 Connection established",0)==-1)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; message="连接代理失败";<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; message="代理连接完成";<br/>&nbsp; &nbsp; m_message.AddText("代理连接完成");<br/>&nbsp; &nbsp; return 1; // ----------〉这里是应该注意的,连接到代理后,就可以返回了,不需要再连接网上的另外一台机,代理服务器会自动转发数据,所以,连接完代理就像连接到网上另外一台机一样<br/>&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; // 这个,是为了给其他代理做准备<br/>&nbsp; &nbsp; else if(m_combo=="Socks4")<br/>&nbsp; &nbsp; {MessageBox("请注意,现在无法使用代理功能!");}<br/>&nbsp; &nbsp; else if(m_combo=="Socks5")<br/>&nbsp; &nbsp; {MessageBox("请注意,现在无法使用代理功能!");}</font><br/><br/><font color="#000000">&nbsp; &nbsp; // 如果没有使用代理,就要连接到网上的另一台机</font><br/>// 准备socket<br/>&nbsp; &nbsp; HTTPSocket=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);<br/><font color="#000000">&nbsp; &nbsp; if (HTTPSocket==INVALID_SOCKET)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; AfxMessageBox("Error when socket");<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; //设置超时<br/>&nbsp; &nbsp; struct linger zeroLinger;<br/>&nbsp; &nbsp; zeroLinger.l_onoff = 1;<br/>&nbsp; &nbsp; zeroLinger.l_linger = 0;<br/>&nbsp; &nbsp; if(setsockopt(HTTPSocket,SOL_SOCKET,SO_LINGER<br/>&nbsp; &nbsp; ,(const char *)&amp;zeroLinger<br/>&nbsp; &nbsp; ,sizeof(zeroLinger))!=0)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; closesocket(HTTPSocket);<br/>&nbsp; &nbsp; AfxMessageBox("Error when setscokopt(LINGER)");<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }<br/>&nbsp; &nbsp;   //设置接收超时<br/>&nbsp; &nbsp; if(setsockopt(HTTPSocket,SOL_SOCKET,SO_RCVTIMEO<br/>&nbsp; &nbsp; ,(const char *)&amp;m_nRecvTimeout<br/>&nbsp; &nbsp; ,sizeof(m_nRecvTimeout))!=0)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; closesocket(HTTPSocket);<br/>&nbsp; &nbsp; AfxMessageBox("Error when setsockopt(RCVTIME).");<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; //设置发送超时<br/>&nbsp; &nbsp; if(setsockopt(HTTPSocket,SOL_SOCKET,SO_SNDTIMEO<br/>&nbsp; &nbsp; ,(const char *)&amp;m_nSendTimeout<br/>&nbsp; &nbsp; ,sizeof(m_nSendTimeout))!=0)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; closesocket(HTTPSocket);<br/>&nbsp; &nbsp; AfxMessageBox("Error when setsockopt(SNDTIMEO).");<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }</font><br/><br/><font color="#000000">&nbsp; &nbsp; SocketAddr.sin_addr.s_addr = htonl (INADDR_ANY);<br/>&nbsp; &nbsp; SocketAddr.sin_family=AF_INET;</font><br/><font color="#000000">&nbsp; &nbsp; // 进行端口绑定<br/>&nbsp; &nbsp; if (bind (HTTPSocket,<br/>&nbsp; &nbsp; (const struct sockaddr FAR *)&amp;SocketAddr,<br/>&nbsp; &nbsp; sizeof(SocketAddr))==SOCKET_ERROR)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; closesocket(HTTPSocket);<br/>&nbsp; &nbsp; AfxMessageBox("Error when bind socket.");<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; //准备连接</font><br/><font color="#000000">&nbsp; &nbsp; /// 准备连接信息<br/>&nbsp; &nbsp; BindSocket.sin_addr.s_addr = inet_addr (strHost);<br/>&nbsp; &nbsp; BindSocket.sin_family=AF_INET;<br/>&nbsp; &nbsp; BindSocket.sin_port=htons(HttpPort);</font><br/><br/><font color="#000000">&nbsp; &nbsp; struct fd_set fdSet;<br/>&nbsp; &nbsp; struct timeval tmvTimeout={0L,0L};</font><br/><font color="#000000">&nbsp; &nbsp; FD_ZERO(&amp;fdSet);<br/>&nbsp; &nbsp; FD_SET(HTTPSocket, &amp;fdSet);</font><br/><font color="#000000">&nbsp; &nbsp; if (select(0,&amp;fdSet,NULL,NULL,&amp;tmvTimeout)==SOCKET_ERROR)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; closesocket(HTTPSocket);<br/>&nbsp; &nbsp; AfxMessageBox("Error when select.");<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; // 连接</font><br/><br/><font color="#000000">&nbsp; &nbsp; if (connect(HTTPSocket, (const struct sockaddr *)&amp;BindSocket, sizeof(BindSocket))==SOCKET_ERROR)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; AfxMessageBox("第一次连接失败,准备第二次连接");<br/>&nbsp; &nbsp; if (connect(HTTPSocket<br/>&nbsp; &nbsp; ,(const struct sockaddr *)&amp;BindSocket<br/>&nbsp; &nbsp; ,sizeof(BindSocket))==SOCKET_ERROR)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; closesocket(HTTPSocket);<br/>&nbsp; &nbsp; AfxMessageBox("连接失败");<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; message="连接完成";</font><br/><font color="#000000">&nbsp; &nbsp; return 1;<br/>&nbsp; &nbsp; }</font><br/><br/><font color="#000000">&nbsp; &nbsp;   (5)发送http请求,为下载数据进行准备</font><br/><font color="#000000">&nbsp; &nbsp; int CDLAngelDlg::SendHttpHeader()<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; //进行下载</font><br/><font color="#000000">&nbsp; &nbsp; CString temp;<br/>&nbsp; &nbsp; BOOL bReturn;<br/>&nbsp; &nbsp; char tmpBuffer[MAXBLOCKSIZE];<br/>&nbsp;&nbsp;///第1行:方法,请求的路径,版本<br/>&nbsp; &nbsp; temp="GET "+DownLoadAddress+hostFile+" HTTP/1.0\r";<br/>&nbsp; &nbsp; bReturn=SocketSend(HTTPSocket,temp);<br/>&nbsp; &nbsp; if(!bReturn)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; message="发送请求失败";<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }</font><br/><br/><font color="#000000">&nbsp; &nbsp; ///第2行:主机<br/>&nbsp; &nbsp; temp="Host "+strHost+"\r";<br/>&nbsp; &nbsp; bReturn=SocketSend(HTTPSocket,temp);<br/>&nbsp; &nbsp; if(!bReturn)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; message="发送请求失败";<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }</font><br/><br/><font color="#000000">&nbsp; &nbsp; ///第3行:接收的数据类型<br/>&nbsp; &nbsp; bReturn=SocketSend(HTTPSocket,"Accept: */*\r");<br/>&nbsp; &nbsp; if(!bReturn)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; message="发送请求失败";<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }</font><br/><br/><font color="#000000">&nbsp; &nbsp; ///第4行:<br/>&nbsp; &nbsp; temp=DownLoadAddress;<br/>&nbsp; &nbsp; temp.Insert(0,"Referer ");<br/>&nbsp; &nbsp; temp+="\r";<br/>&nbsp; &nbsp; bReturn=SocketSend(HTTPSocket,temp);<br/>&nbsp; &nbsp; if(!bReturn)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; message="发送请求失败";<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }</font><br/><br/><font color="#000000">&nbsp; &nbsp; ///第5行:浏览器类型</font><br/><font color="#000000">&nbsp; &nbsp; bReturn=SocketSend(HTTPSocket,"User-Agent: Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt; DTS Agent;)\r");<br/>&nbsp; &nbsp; if(!bReturn)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; message="发送请求失败";<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; ///第6行:连接设置,保持<br/>&nbsp; &nbsp; // SocketSend(HTTPSocket,"Connection:Keep-Alive\r");</font><br/><font color="#000000">&nbsp; &nbsp; ///第7行:Cookie.</font><br/><font color="#000000">&nbsp; &nbsp; bReturn=SocketSend(HTTPSocket,"Cache-Control: no-cache\r");<br/>&nbsp; &nbsp; if(!bReturn)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; message="发送请求失败";<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }</font><br/><br/><font color="#000000">&nbsp; &nbsp; bReturn=SocketSend(HTTPSocket,"Proxy-Connection: Keep-Alive\r");<br/>&nbsp; &nbsp; if(!bReturn)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; message="发送请求失败";<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; /// 续传</font><br/><font color="#000000">&nbsp; &nbsp; Range是要下载的数据范围,对续传很重要<br/>&nbsp; &nbsp; if(continueFlag)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; temp.Format("Range: bytes=%d- \r",conLength);<br/>&nbsp; &nbsp; bReturn=SocketSend(HTTPSocket,temp);<br/>&nbsp; &nbsp; if(!bReturn)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; message="发送请求失败";<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }<br/>&nbsp; &nbsp; }<br/>///最后一行:空行<br/>&nbsp; &nbsp; bReturn=SocketSend(HTTPSocket,"\r");<br/>&nbsp; &nbsp; if(!bReturn)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; message="发送请求失败";<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; ///取得http头<br/>&nbsp; &nbsp; int i;<br/>&nbsp; &nbsp; i=GetHttpHeader(HTTPSocket,tmpBuffer);<br/>&nbsp; &nbsp; if(!i)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; message="获取HTTP头出错";<br/>&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; //如果取得的http头含有404等字样,则表示连接出问题<br/>&nbsp; &nbsp; temp=tmpBuffer;<br/>&nbsp; &nbsp; if(temp.Find("404")!=-1)<br/>&nbsp; &nbsp; {</font><br/><font color="#000000">&nbsp; &nbsp; return 0;<br/>&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; // 得到待下载文件的大小</font><br/><font color="#000000">&nbsp; &nbsp; filelength=GetFileLength(tmpBuffer);</font><br/><font color="#000000">&nbsp; &nbsp; return 1;<br/>&nbsp; &nbsp; }</font><br/><br/><font color="#000000">&nbsp; &nbsp;   这样,就连接到网上的另一台机了,如何下载数据,不用多说了吧</font><br/><font color="#000000">&nbsp; &nbsp; while((num!=SOCKET_ERROR) &amp;&amp; (num!=0))<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; num=recv (HTTPSocket<br/>&nbsp; &nbsp; ,(char FAR *)tmpBuffer<br/>&nbsp; &nbsp; ,(MAXBLOCKSIZE-1)<br/>&nbsp; &nbsp; ,0);</font><br/><br/><font color="#000000">&nbsp; &nbsp; file.Write(tmpBuffer,num);</font><br/><font color="#000000">&nbsp; &nbsp; if(ExitFlag)<br/>&nbsp; &nbsp; {<br/>&nbsp; &nbsp; file.Close();<br/>&nbsp; &nbsp; closesocket(HTTPSocket);</font><br/><font color="#000000">&nbsp; &nbsp; DownComplete=1;</font><br/><font color="#000000">&nbsp; &nbsp; m_message.CleanText();<br/>&nbsp; &nbsp; m_message.ShowColorText(RGB(128,128,0),DLCompleteMes);</font><br/><font color="#000000">&nbsp; &nbsp; m_progress.ShowWindow(SW_HIDE);<br/>&nbsp; &nbsp; m_stopDownload.ShowWindow(SW_HIDE);<br/>&nbsp; &nbsp; _endthread();<br/>&nbsp; &nbsp; }</font><br/><font color="#000000">&nbsp; &nbsp; }</font><br/><br/>
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