打造自己的HTTP代理服务器

韩冰

/*========================================================================= 9 L# U1 X- K6 l# q% sFILE:HTTPPROXY.cpp 6 {# a* c& ?0 o+ a1 v6 bHTTP Proxy v1.0 powered by shadow 2004/11/14 my web:http://www.codehome.6600.org 4 z% F/ B, G8 OQQ:176017352 请先阅读有关http代理协议的相关资料,转载请著明出处 5 c$ q$ H- P+ U" n==========================================================================*/

#include "stdafx.h" ( n6 |0 w- l% D, x: g" ]) j#include "HTTPPROXY.h" 8 @$ s" f2 r, i0 r- g3 B#define FD_NOEVENT 0 . A* @* t M; [// ) U' J8 Z! _- R* n1 b#define BACKUP 100 #define MAXDATALEN 65535 : q& A( Q# E1 t# \/ ~ gint HttpListenPort; SOCKET HttpListenSock; // typedef struct _CLIENTINFO{ 8 d* V% _* a. p i- d0 i$ d2 x# DSOCKET clientsock; : ^/ r) F8 X4 V I+ R, f& e6 s, lSOCKET udpsock; ( X& e" m3 d0 F4 l7 @; n/ z! msockaddr_in clientsock_addr; }CLIENTINFO,*LPCLIENTINFO; ( q) b4 U+ K2 n/ W* v; {CLIENTINFO HttpClientInfo; // 0 j8 Y! I: `% g# D& r' V( S. |typedef struct _SOCKINFO{ ) ^. s% e5 |' {& P2 P: cSOCKET sourcesock; SOCKET destsock; 8 S4 j* R3 e' Q5 r}SOCKINFO,*LPSOCKINFO; SOCKINFO httpsockinfo; // ! H' V' d6 s( @' R {, q/ o; Kextern long GetSocketEventId(SOCKET remotesock); extern unsigned long GetLocalIp(); extern unsigned long GetDomainIp(char domainname[250]); / S' b! t& \+ B6 a/* l% U" I# q. h0 @long GetSocketEventId(SOCKET remotesock){ . q z8 E# q7 }. Blong EventId; HANDLE hevent; hevent=CreateEvent(NULL,0,0,0); , Y$ F( s" x* O+ F d1 X6 ]WSANETWORKEVENTS socket_events; 0 F/ g: h& T+ i: }) N3 k" d, UEventId=FD_NOEVENT; 0 Q9 N% W# A7 Zif(WSAEventSelect(remotesock,hevent,FD_ACCEPT|FD_CONNECT|FD_READ|FD_WRITE|FD_CLOSE)==SOCKET_ERROR) return EventId; * j* h5 l$ X: t( M: W6 Y' OWSAEnumNetworkEvents(remotesock,hevent,&socket_events); if(socket_events.lNetworkEvents!=0){ , ]4 j3 X0 P% J, iswitch(socket_events.lNetworkEvents){ 5 }1 `" f% ]/ I0 ycase FD_ACCEPT:EventId=FD_ACCEPT;break; case FD_CONNECT:EventId=FD_CONNECT;break; # z: A; X" O! W, w$ n7 b; Ccase FD_READ:EventId=FD_READ;break; case FD_WRITE:EventId=FD_WRITE;break; case FD_CLOSE:EventId=FD_CLOSE;break; case FD_OOB:EventId=FD_OOB;break; default:EventId=FD_NOEVENT;break; ! h5 v8 B0 x& o# O} } else EventId=FD_NOEVENT; 4 _! j; c, }1 i+ `& l# ~return EventId; } // % U2 d; C- j. \( Munsigned long GetLocalIp() 4 X" H. |9 W& E8 k! H{ char IP[MAX_PATH],*ip; 1 ^' F K. h4 s# k! H( p+ g8 i4 Rchar pc_name[80]; struct in_addr in; struct hostent *host; WORD wVersionRequested; WSADATA wsaData; ; O' n! |$ y3 {) t7 s: K( b6 lwVersionRequested=MAKEWORD(2,0); ip=IP; * R+ ]" Y5 K9 w/ e& S$ H5 h8 Bstrcpy(ip,"Ip not get!"); if(WSAStartup(wVersionRequested,&wsaData)) return 0; . H+ l& _! N0 m; q! V$ k. \if(gethostname(pc_name,80)==SOCKET_ERROR){ ; D& }/ ]+ M! i. J# v) D5 \WSACleanup(); return 0; ( T0 E' n$ J! {% t} if(!(host=gethostbyname(pc_name))){ 4 O. ?* N: i0 H ~WSACleanup(); return 0; } $ B5 T$ t- P$ l+ R3 f5 {# r! ^in.s_addr=*((unsigned long *)host->h_addr_list[0]); , j/ g1 G8 y( T0 gstrcpy(ip,inet_ntoa(in)); 2 `' F7 K) L& B' Y( U' vWSACleanup(); + W2 Q# N, c' S3 e; K, Z preturn in.s_addr; } * ?+ I+ {" g/ i! L4 [4 a/ x// 8 F0 I- i4 Y) e* O8 s: ^0 d/ ounsigned long GetDomainIp(char domainname[250]) { ( e% u: t7 F; gchar IP[MAX_PATH],*ip; & J' A0 e0 L% Z' ystruct in_addr in; ; Q( B" E: g8 y7 e: Z0 |( zstruct hostent *host; + t, F1 K F: i1 X/ a" H& AWORD wVersionRequested; 9 b# ~' d8 e! C( V- MWSADATA wsaData; * U+ N* N! f' i1 u o* z* G3 u2 O2 HwVersionRequested=MAKEWORD(2,0); ; C6 ?/ B* w- ]7 a( a, L1 Gip=IP; ! x+ v8 v. D( P X" t9 A/ s5 P9 ~strcpy(ip,"Ip not get!"); 5 c; a& N5 A d7 f% h; [$ N" Dif(WSAStartup(wVersionRequested,&wsaData)) return 0; if(!(host=gethostbyname(domainname))){ 3 L6 |6 F4 b6 r5 m: R1 s5 xWSACleanup(); 4 }0 z$ Y8 g# N; M# O/ C7 W' rreturn 0; ' |( V, i# E: T+ v; K2 D" \} : [" X1 h9 m) h1 \in.s_addr=*((unsigned long *)host->h_addr_list[0]); 5 w8 r$ ?2 N5 t, n' I! R3 ^. n4 ostrcpy(ip,inet_ntoa(in)); WSACleanup(); return in.s_addr; " ]. M' [. H6 ]5 V- b+ e& E8 o2 e} */ // * b" ]" W9 x# F// 9 i% x: Z: K2 U2 e( G0 }UINT HttpReciveThread(LPVOID info){ //针对客户端的接收处理线程 LPSOCKINFO psockinfo; SOCKET sourcesock,destsock; char data[MAXDATALEN]; , n8 E. D: N% e7 w+ ~) | _7 elong eventid; int datalen; psockinfo=(LPSOCKINFO)info; ! L$ f& Z' z5 }8 V" y0 W" x. |sourcesock=psockinfo->sourcesock; 3 ^' G1 ^+ T$ g1 E: c* P: ^6 odestsock=psockinfo->destsock; TRACE("deail recive thread ok!\r\n"); ' {5 O4 j4 p. y/ W7 rwhile(true){ eventid=GetSocketEventId(sourcesock); switch(eventid){ case FD_CLOSE: TRACE("s fdclosed\r\n"); closesocket(destsock); return 1; break; default:break; ' I$ W+ J5 }5 p5 e4 S} eventid=GetSocketEventId(destsock); switch(eventid){ case FD_CLOSE: : U0 N& N- T2 X* Q- P- e8 K t. iclosesocket(sourcesock); & d. l: |1 m, {6 B- f8 a- RTRACE("d fdclosed\r\n"); return 1; $ V( g% }" \6 k: P3 |. P9 R/ q- Pbreak; 3 a5 P0 T6 r0 z# y% Mdefault:break; } : g0 X/ q# v- i; Y: a) Jdatalen=recv(sourcesock,data,sizeof(data),0); if(datalen==0){ 3 s; j5 r; n. S, Z, A$ z3 Fclosesocket(sourcesock); 2 Q, w8 b- R% ~/ |' Zclosesocket(destsock); TRACE("s fdclosed\r\n"); ; Z5 P& S! @/ ?/ y" I- dbreak; # u1 x+ ~+ b5 W} ' [9 Q' |; |8 ?, Tif(datalen>0){ while(!send(destsock,data,datalen,0)); $ m7 k9 m: | e. M} Sleep(1); } O! P9 Z- ]/ Q0 A0 i$ Q, k, U2 c7 Freturn 1; } 8 Y) A/ U$ H! S d7 e7 X// & }% F o+ t% p, y8 h' |8 RUINT HttpSendThread(LPVOID info){ //针对远程端的接收处理线程 2 D: e! ]/ a' a9 mLPSOCKINFO psockinfo; " y3 V- Y' z+ d$ D1 I' w( M9 e1 F5 E6 l7 _SOCKET sourcesock,destsock; 8 i; J- @' a& ], F; @6 C) {& y9 Tchar data[MAXDATALEN]; long eventid; int datalen; & N+ w P% b5 g" B; tpsockinfo=(LPSOCKINFO)info; sourcesock=psockinfo->sourcesock; destsock=psockinfo->destsock; TRACE("deail send thread ok!\r\n"); while(true){ ?% x, \8 W( m- O8 }eventid=GetSocketEventId(sourcesock); : _8 [) v4 n# J. V1 _6 Rswitch(eventid){ 8 w& h. K9 g& [6 V% \9 O2 c Ncase FD_CLOSE: % M* V- |/ U& p% m8 STRACE("s fdclosed\r\n"); closesocket(destsock); return 1; # B( f% p% a) H3 N ybreak; default:break; 3 R5 X$ R) R3 O4 U `0 m/ f} 5 w" \6 [# d2 \eventid=GetSocketEventId(destsock); 6 }9 k! K0 P0 _* R/ {) h3 jswitch(eventid){ case FD_CLOSE: 2 J% F: p* i6 lclosesocket(sourcesock); TRACE("d fdclosed\r\n"); return 1; break; default:break; , u( ?2 O6 D% V4 J5 s& D3 K} datalen=recv(destsock,data,sizeof(data),0); ! ~& N. Q. C$ F3 [if(datalen==0){ closesocket(sourcesock); ' y6 U4 Q; b! w* N1 `+ Zclosesocket(destsock); TRACE("d fdclosed\r\n"); break; , e2 X# C0 Q' {. l7 [} if(datalen>0){ while(!send(sourcesock,data,datalen,0)); } & R6 G) @9 F/ @8 E! O6 mSleep(1); } return 1; } // ) W* C; N: R: h1 s: }// UINT HttpProxyServerThread(LPVOID info){ //针对一次服务的线程 + y6 w$ I0 [. X- F7 d2 }" hLPCLIENTINFO pclientinfo; 1 A: Z( \, G$ C( C* x# u6 uSOCKET connectsock,clientsock; ( ^: N9 ~: \5 q/ }7 n% xsockaddr_in remotesock_addr; * N G1 E! E1 ] Ychar data[MAXDATALEN],url[250],temp[250],httpurl[250],portnum[10]; int datalen,i,index_start,index_end,port; * v+ p7 }0 c4 F" |1 n5 bCString HttpString,UrlString,PortString; pclientinfo=(LPCLIENTINFO)info; 0 a0 p, B& D( m5 L" x) d- E8 v fclientsock=pclientinfo->clientsock; ( w! y) f M7 z: b8 ?ZeroMemory((void *)data,sizeof(data)); datalen=recv(clientsock,data,sizeof(data),0); if(datalen<=0){ 7 D1 s5 a) i$ n+ qclosesocket(clientsock); $ F' G, ?$ ^) {, z0 }- p5 r; }return 0;

韩冰

} + u" Q9 N+ |$ t* k$ [/ c; S0 iHttpString.Format("%s",data); ! g3 v# N: ]6 L) G6 g/ d/ ZUrlString=HttpString; / e2 N4 f+ L' c, oTRACE("get http string:\r\n"); TRACE(HttpString); " U+ D6 n) \/ j+ J9 z4 ? T$ t* Oindex_start=HttpString.Find("Host: ",0); //寻找url标记 ( z$ g" j2 S' `5 s: Sif(index_start<=0){ closesocket(clientsock); 5 L5 {+ i! ?2 p+ ?) X4 Kreturn 0; } 3 p+ D/ E/ _# }5 P- `) [* z0 sindex_end=HttpString.Find("\r\n",index_start); if(index_end<=0){ " m- ^" f2 {1 B" ]closesocket(clientsock); $ [& T; _2 B) f l8 B$ w- F) dreturn 0; } + x% `: T7 P6 t6 ]9 @( {' G2 oUrlString=HttpString.Mid(index_start+6,index_end-index_start-6); //读取 url字符串 ) M9 A: H. K! U5 u6 zTRACE("\r\n get url:"); 3 T& Y k9 Y/ ]+ B: n8 z. qTRACE(UrlString); + G8 h: d* S6 w8 f% I0 lwsprintf(url,"%s",UrlString); strcpy(temp,url); strcat(temp,":"); datalen=strlen(temp); if(HttpString.Find("GET",0)==0){ //判断get命令，并处理 4 {* E+ E d% i% R6 |index_start=HttpString.Find(temp,0); 5 n) b3 L1 _* j! P) wstrcpy(httpurl,"http://"); if(index_start>0){ 2 }; ]# g/ X! E1 k# U& @5 k3 X1 iindex_end=HttpString.Find("/",index_start); ! h) c& `0 R" y! mif(index_end<=0){ + h5 C* @4 v5 w& p( W: jclosesocket(clientsock); 2 C' [% [1 T7 E% M. ereturn 0; } PortString=HttpString.Mid(index_start+datalen,index_end-index_start-datalen); port=atoi(PortString); strcat(httpurl,temp); itoa(port,portnum,sizeof(portnum)); strcat(httpurl,portnum); + C7 l% T6 y; s/ Ustrcat(httpurl,"/"); + P0 N$ O' O1 ]$ r9 R9 K$ f$ \} # A$ z9 N9 o z' a0 u& melse{ port=80; strcat(httpurl,url); % T% U. C( a1 u- istrcat(httpurl,"/"); } 0 {6 a' F6 I/ i, t% u4 H/ xTRACE("get http url:%s\r\n",httpurl); % z& K4 U% z F+ @: P+ E) kHttpString.Replace(httpurl,"/"); " z. R& D- v7 L/ g6 f. g. d. LHttpString.Replace("Proxy-",""); HttpString.Replace("HTTP/1.0","HTTP/1.1"); } else if(HttpString.Find("CONNECT",0)==0){ //判断connect命令并处理 index_start=HttpString.Find(temp,0); if(index_start>0){ index_end=HttpString.Find(" ",index_start); ! l7 s6 ~+ i& uif(index_end<=0){ 2 `% u9 L! d: `closesocket(clientsock); return 0; * L" M, I- [/ \" m} PortString=HttpString.Mid(index_start+datalen,index_end-index_start-datalen); port=atoi(PortString); 3 T8 W5 i. M6 [- F: O+ n8 l} ! D3 {2 n( z( melse{ closesocket(clientsock); return 0; } 6 t; r" S6 p! n7 r3 O7 o, z) A} & t/ }- }" s A& t$ sTRACE("get new http string:\r\n"); . ~/ |9 ?: L# J% H# j9 @/ s+ HTRACE(HttpString); remotesock_addr.sin_family=AF_INET; 8 O# R4 A( k2 H% @- v% r( ^* Y; n) qremotesock_addr.sin_port=htons(port); - c$ B+ u, T0 K. _( z: _5 fremotesock_addr.sin_addr.S_un.S_addr=GetDomainIp(url); connectsock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); if(connect(connectsock,(const sockaddr *)&remotesock_addr,sizeof(remotesock_addr))==INVALID_SOCKET){ //连接远程主机 7 z' \- {' ?! e3 Hclosesocket(clientsock); return 0; } " W0 V: A' M4 s* z& XTRACE("\r\nconnect to remote ip ok\r\n"); ' q. f# h1 T0 e5 v/ q7 B: N1 \ZeroMemory((void *)data,sizeof(data)); - d, f2 P0 T1 v9 Ywsprintf(data,"%s",HttpString); datalen=strlen(data); 5 d. D# J- q# y- \if(HttpString.Find("CONNECT",0)<0) while(!send(connectsock,data,datalen,0)); 6 v7 p% o* \* ~1 s7 N1 R* Q* xelse{ strcpy(data,"HTTP/1.0 200 Connection established\r\nProxy-agent: CHTTPPROXY V1.0 powered by shadow\r\n\r\n"); datalen=strlen(data); while(!send(clientsock,data,datalen,0)); * v/ v. I0 ?$ P} httpsockinfo.sourcesock=clientsock; httpsockinfo.destsock=connectsock; AfxBeginThread(HttpReciveThread,(LPVOID)&httpsockinfo); //抛出处理线程 5 d: M. E& [/ t) V8 OAfxBeginThread(HttpSendThread,(LPVOID)&httpsockinfo); // Sleep(100); return 1; } // 4 \- f+ E n# bUINT StartHttpProxy(LPVOID info){ //端口监听线程 7 L! o3 O5 x6 C5 j& nSOCKET NewSock; 3 {1 T( R" X. Aint socklen; sockaddr_in serversock,remotesock_addr; serversock.sin_family=AF_INET; serversock.sin_addr.S_un.S_addr=INADDR_ANY; serversock.sin_port=htons(HttpListenPort); HttpListenSock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); if(HttpListenSock==INVALID_SOCKET) return 0; & C1 g: Z3 E- _) c/ O2 Tif(bind(HttpListenSock,(const sockaddr *)&serversock,sizeof(serversock))==SOCKET_ERROR) return 0; listen(HttpListenSock,BACKUP); socklen=sizeof(remotesock_addr); 3 ?! Y0 d) a0 v+ h7 E2 PTRACE("start http proxy thread while\r\n"); & J+ R( b$ W3 v+ kwhile(true){ NewSock=accept(HttpListenSock,(sockaddr *)&remotesock_addr,&socklen); TRACE("waitting ok...\r\n"); if(NewSock==INVALID_SOCKET){ Sleep(1); + |* L0 U8 {) q; \. n* P% scontinue; . B1 d, u2 j" V$ k' C$ n& Y$ ?} * t( y% |$ z5 S. D# {9 W0 yZeroMemory((void *)&HttpClientInfo,sizeof(CLIENTINFO)); $ N9 c! O5 m+ {& O1 P" y- m& JHttpClientInfo.clientsock=NewSock; HttpClientInfo.clientsock_addr=remotesock_addr; ! l( c9 J" l- {TRACE("start proxy thread\r\n"); , ^* k4 U3 V' z$ _& _* x& lAfxBeginThread(HttpProxyServerThread,(LPVOID)&HttpClientInfo); $ k3 w5 I% j! D) U, c- T- tSleep(100); : ~! u9 r+ p5 l: ]8 b} & B# j& d! T: b, H, b0 L/ B4 creturn 1; } // CHTTPPROXY::CHTTPPROXY() { WSADATA WsaData; $ o$ f [; m1 l% XWORD wsaVer; wsaVer=MAKEWORD(2,0); WsaStartupOk=false; % v% |4 T4 j8 I4 `8 k5 B' Yif(WSAStartup(wsaVer,&WsaData)!=SOCKET_ERROR) WsaStartupOk=true; }

CHTTPPROXY::~CHTTPPROXY() { if(WsaStartupOk){ WSACleanup(); $ j, p: g3 I, l% U- c7 {8 A0 |& Q8 o} }

int CHTTPPROXY::StartProxy(int listenport) { HttpListenPort=listenport; , a u! {' Z$ o. d" NAfxBeginThread(StartHttpProxy,(LPVOID)NULL); return 1; 3 i a1 i9 q* @2 ^7 ~$ L}

! e& u; l4 e2 ]% u; C, c0 P/ t/*========================================================================= FILE:HTTPPROXY.h ==========================================================================*/ class CHTTPPROXY { public: int StartProxy(int listenport); bool WsaStartupOk; CHTTPPROXY(); 4 k& t: q% E+ J! b& Q& Ovirtual ~CHTTPPROXY();

};

/*========================================================================= 6 l- R8 J" M% |# b" hFILE:stdafx.h " b9 X9 R6 c" v! j. ~' w+ v$ r==========================================================================*/ ' W' }3 {1 u1 t7 w! b# x6 U& Y; I+ o; K#include ' D# _% Y f5 w% g( d) d9 U#include #include * O. L- {3 ?% G5 F#include

注:不要忘了在link选项中添加wsock32.lib和ws2_32.lib，或在文件前部加上如下语句： #paragma comment(lib,"wsock32.lib") 0 W& D4 s6 i9 m0 ~- K/ N#paragma comment(lib,"ws2_32.lib")

本代码在win2k和vc6.0下编译成功~~ : ?4 J0 D) u* R+ ?. `用法,把这几个文件添加到你的项目中，在WinMain()中添加如下代码: CHTTPPROXY httpproxy; , q* B9 T! F' }3 ]httpproxy.StartProxy(7890); * Q# I! N9 v. v. ^* a有问题mailto me！