Подскажите пожалуйста где взять исходничёк показывающий пример работы с прокси-сервером
Если можно ссылочку.
Здравствуйте Фока, Вы писали:
Ф>Подскажите пожалуйста где взять исходничёк показывающий пример работы с прокси-сервером
Ф>Если можно ссылочку.
Ссылочки под рукой нет, вот с этим кодом можешь разбираться
// stdafx.h : include file for standard system include files,
// or project specific include files that are used frequently, but
// are changed infrequently
//
#if !defined(AFX_STDAFX_H__9FB34C62_F5D6_11D2_81C6_006097CF14A0__INCLUDED_)
#define AFX_STDAFX_H__9FB34C62_F5D6_11D2_81C6_006097CF14A0__INCLUDED_
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
#define VC_EXTRALEAN // Exclude rarely-used stuff from Windows headers
#include <afx.h>
#include <afxwin.h> // MFC core and standard components
#include <afxext.h> // MFC extensions
#include <afxdtctl.h> // MFC support for Internet Explorer 4 Common Controls
#ifndef _AFX_NO_AFXCMN_SUPPORT
#include <afxcmn.h> // MFC support for Windows Common Controls
#endif // _AFX_NO_AFXCMN_SUPPORT
#include <iostream>
// TODO: reference additional headers your program requires here
//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.
#endif // !defined(AFX_STDAFX_H__9FB34C62_F5D6_11D2_81C6_006097CF14A0__INCLUDED_)
// Proxy.cpp is very simple program to implement the HTTP proxy function.
// To make it short and clear , some error tolerant codes are omitted.
// Written by HU Zhongshan
// e-mail huzhongshan@hotmail.com OR yangjy@mail.njust.edu.cn
// 1999-4-18
#include "stdafx.h"
#include <winsock2.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// The one and only application object
#define HTTP "http://"
#define FTP "ftp://"
#define PROXYPORT 5060 //Proxy Listen Port
#define BUFSIZE 10240 //Buffer size
CWinApp theApp;
using namespace std;
UINT ProxyToServer(LPVOID pParam);
UINT UserToProxyThread(void *pParam);
struct SocketPair{
SOCKET user_proxy; //socket : local machine to proxy server
SOCKET proxy_server; //socket : proxy sever to remote server
BOOL IsUser_ProxyClosed; // status of local machine to proxy server
BOOL IsProxy_ServerClosed; // status of proxy server to remote server
};
struct ProxyParam{
char Address[256]; // address of remote server
HANDLE User_SvrOK; // status of setup connection between proxy server and remote server
SocketPair *pPair; // pointer to socket pair
int Port; // port which will be used to connect to remote server
}; //This struct is used to exchange information between threads.
SOCKET gListen_Socket;
int StartServer()
{
WSADATA wsaData;
sockaddr_in local;
SOCKET listen_socket;
if(::WSAStartup(0x202,&wsaData)!=0)
{printf("\nError in Startup session.\n");WSACleanup();return -1;};
local.sin_family=AF_INET;
local.sin_addr.s_addr=INADDR_ANY;
local.sin_port=htons(PROXYPORT);
listen_socket=socket(AF_INET,SOCK_STREAM,0);
if(listen_socket==INVALID_SOCKET)
{printf("\nError in New a Socket.");WSACleanup();return -2;}
if(::bind(listen_socket,(sockaddr *)&local,sizeof(local))!=0)
{printf("\n Error in Binding socket."); WSACleanup();return -3; };
if(::listen(listen_socket,5)!=0)
{printf("\n Error in Listen."); WSACleanup(); return -4;}
gListen_Socket=listen_socket;
AfxBeginThread(UserToProxyThread,NULL); //Start accept function
return 1;
}
int CloseServer()
{
closesocket(gListen_Socket);
WSACleanup();
return 1;
}
//Analisys the string, to find the remote address
int GetAddressAndPort( char * str, char *address, int * port)
{
char buf[BUFSIZE], command[512], proto[128], *p;
int j;
sscanf(str,"%s%s%s",command,buf,proto);
p=strstr(buf,HTTP);
//HTTP
if(p)
{
p+=strlen(HTTP);
for(int i=0;i<strlen(p);i++)
if( *(p+i)=='/') break;
*(p+i)=0;
strcpy(address,p);
p=strstr(str,HTTP);
for(int j=0;j<i+strlen(HTTP);j++)
*(p+j)=' '; //to remove the host name: GET http://www.njust.edu.cn/ HTTP1.1 ==> GET / HTTP1.1
*port=80; //default http port
}
else
{//FTP, Not supported, and following code can be omitted.
p=strstr(buf,FTP);
if(!p) return 0;
p+=strlen(FTP);
for(int i=0;i<strlen(p);i++)
if( *(p+i)=='/') break; //Get The Remote Host
*(p+i)=0;
for(j=0;j<strlen(p);j++)
if(*(p+j)==':')
{*port=atoi(p+j+1); //Get The Port
*(p+j)=0;
}
else *port=21;
strcpy(address,p);
p=strstr(str,FTP);
for(j=0;j<i+strlen(FTP);j++)
*(p+j)=' ';
}
return 1;
}
// Setup chanel and read data from local , send data to remote
UINT UserToProxyThread(void *pParam)
{
char Buffer[BUFSIZE];
int Len;
sockaddr_in from;
SOCKET msg_socket;
int fromlen,retval;
SocketPair SPair;
ProxyParam ProxyP;
CWinThread *pChildThread;
fromlen=sizeof(from);
msg_socket=accept(gListen_Socket,(struct sockaddr*)&from,&fromlen);
AfxBeginThread(UserToProxyThread,pParam); //Start another thread to listen.
if( msg_socket==INVALID_SOCKET)
{ printf( "\nError in accept "); return -5;}
//recieve the first line of client
SPair.IsUser_ProxyClosed=FALSE;
SPair.IsProxy_ServerClosed=TRUE;
SPair.user_proxy=msg_socket;
retval=recv(SPair.user_proxy,Buffer,sizeof(Buffer),0);
if(retval==SOCKET_ERROR)
{ printf("\nError Recv");
if(SPair.IsUser_ProxyClosed==FALSE)
{closesocket(SPair.user_proxy);
SPair.IsUser_ProxyClosed=TRUE;
}
}
if(retval==0)
{printf("Client Close connection\n");
if(SPair.IsUser_ProxyClosed==FALSE)
{closesocket(SPair.user_proxy);
SPair.IsUser_ProxyClosed=TRUE;
}
}
Len=retval;
#ifdef _DEBUG
Buffer[Len]=0;
printf("\n Received %d bytes,data[%s]from client\n",retval,Buffer);
#endif
//
SPair.IsUser_ProxyClosed=FALSE;
SPair.IsProxy_ServerClosed=TRUE;
SPair.user_proxy=msg_socket;
ProxyP.pPair=&SPair;
ProxyP.User_SvrOK=CreateEvent(NULL,TRUE,FALSE,NULL);
GetAddressAndPort( Buffer,ProxyP.Address,&ProxyP.Port);
pChildThread=AfxBeginThread(ProxyToServer,(LPVOID)&ProxyP);
::WaitForSingleObject(ProxyP.User_SvrOK,60000); //Wait for connection between proxy and remote server
::CloseHandle(ProxyP.User_SvrOK);
while(SPair.IsProxy_ServerClosed ==FALSE && SPair.IsUser_ProxyClosed==FALSE)
{
retval=send(SPair.proxy_server,Buffer,Len,0);
if(retval==SOCKET_ERROR)
{ printf("\n send() failed:error%d\n",WSAGetLastError());
if(SPair.IsProxy_ServerClosed==FALSE)
{
closesocket(SPair.proxy_server);
SPair.IsProxy_ServerClosed=TRUE;
}
continue;
}
retval=recv(SPair.user_proxy,Buffer,sizeof(Buffer),0);
if(retval==SOCKET_ERROR)
{ printf("\nError Recv");
if(SPair.IsUser_ProxyClosed==FALSE)
{closesocket(SPair.user_proxy);
SPair.IsUser_ProxyClosed=TRUE;
}
continue;
}
if(retval==0)
{printf("Client Close connection\n");
if(SPair.IsUser_ProxyClosed==FALSE)
{closesocket(SPair.user_proxy);
SPair.IsUser_ProxyClosed=TRUE;
}
break;
}
Len=retval;
#ifdef _DEBUG
Buffer[Len]=0;
printf("\n Received %d bytes,data[%s]from client\n",retval,Buffer);
#endif
} //End While
if(SPair.IsProxy_ServerClosed==FALSE)
{
closesocket(SPair.proxy_server);
SPair.IsProxy_ServerClosed=TRUE;
}
if(SPair.IsUser_ProxyClosed==FALSE)
{closesocket(SPair.user_proxy);
SPair.IsUser_ProxyClosed=TRUE;
}
::WaitForSingleObject(pChildThread->m_hThread,20000); //Should check the reture value
return 0;
}
// Read data from remote and send data to local
UINT ProxyToServer(LPVOID pParam)
{
ProxyParam * pPar=(ProxyParam*)pParam;
char Buffer[BUFSIZE];
char *server_name= "localhost";
unsigned short port ;
int retval,Len;
unsigned int addr;
int socket_type ;
struct sockaddr_in server;
struct hostent *hp;
SOCKET conn_socket;
socket_type = SOCK_STREAM;
server_name = pPar->Address;
port = pPar->Port;
if (isalpha(server_name[0])) { /* server address is a name */
hp = gethostbyname(server_name);
}
else { /* Convert nnn.nnn address to a usable one */
addr = inet_addr(server_name);
hp = gethostbyaddr((char *)&addr,4,AF_INET);
}
if (hp == NULL ) {
fprintf(stderr,"Client: Cannot resolve address [%s]: Error %d\n",
server_name,WSAGetLastError());
::SetEvent(pPar->User_SvrOK);
return 0;
}
//
// Copy the resolved information into the sockaddr_in structure
//
memset(&server,0,sizeof(server));
memcpy(&(server.sin_addr),hp->h_addr,hp->h_length);
server.sin_family = hp->h_addrtype;
server.sin_port = htons(port);
conn_socket = socket(AF_INET,socket_type,0); /* Open a socket */
if (conn_socket <0 ) {
fprintf(stderr,"Client: Error Opening socket: Error %d\n",
WSAGetLastError());
pPar->pPair->IsProxy_ServerClosed=TRUE;
::SetEvent(pPar->User_SvrOK);
return -1;
}
#ifdef _DEBUG
printf("Client connecting to: %s\n",hp->h_name);
#endif
if (connect(conn_socket,(struct sockaddr*)&server,sizeof(server))
== SOCKET_ERROR) {
fprintf(stderr,"connect() failed: %d\n",WSAGetLastError());
pPar->pPair->IsProxy_ServerClosed=TRUE;
::SetEvent(pPar->User_SvrOK);
return -1;
}
pPar->pPair->proxy_server=conn_socket;
pPar->pPair->IsProxy_ServerClosed=FALSE;
::SetEvent(pPar->User_SvrOK);
// cook up a string to send
while(!pPar->pPair->IsProxy_ServerClosed &&!pPar->pPair->IsUser_ProxyClosed)
{
retval = recv(conn_socket,Buffer,sizeof (Buffer),0 );
if (retval == SOCKET_ERROR ) {
fprintf(stderr,"recv() failed: error %d\n",WSAGetLastError());
closesocket(conn_socket);
pPar->pPair->IsProxy_ServerClosed=TRUE;
break;
}
Len=retval;
if (retval == 0) {
printf("Server closed connection\n");
closesocket(conn_socket);
pPar->pPair->IsProxy_ServerClosed=TRUE;
break;
}
retval = send(pPar->pPair->user_proxy,Buffer,Len,0);
if (retval == SOCKET_ERROR) {
fprintf(stderr,"send() failed: error %d\n",WSAGetLastError());
closesocket(pPar->pPair->user_proxy);
pPar->pPair->IsUser_ProxyClosed=TRUE;
break;
}
#ifdef _DEBUG
Buffer[Len]=0;
printf("Received %d bytes, data [%s] from server\n",retval,Buffer);
#endif
}
if(pPar->pPair->IsProxy_ServerClosed==FALSE)
{
closesocket(pPar->pPair->proxy_server);
pPar->pPair->IsProxy_ServerClosed=TRUE;
}
if(pPar->pPair->IsUser_ProxyClosed==FALSE)
{closesocket(pPar->pPair->user_proxy);
pPar->pPair->IsUser_ProxyClosed=TRUE;
}
return 1;
}
int _tmain(int argc, TCHAR* argv[], TCHAR* envp[])
{
int nRetCode = 0;
// initialize MFC and print and error on failure
if (!AfxWinInit(::GetModuleHandle(NULL), NULL, ::GetCommandLine(), 0))
{
// TODO: change error code to suit your needs
cerr << _T("Fatal Error: MFC initialization failed") << endl;
nRetCode = 1;
}
else
{
// TODO: code your application's behavior here.
StartServer();
while(1)
if(getchar()=='q') break;
CloseServer();
}
return nRetCode;
}
