打造自己的HTTP代理服务器

韩冰

/*========================================================================= FILE:HTTPPROXY.cpp & Q) Z' [9 n6 f5 K; L! ZHTTP Proxy v1.0 powered by shadow 2004/11/14 my web:http://www.codehome.6600.org QQ:176017352 S) k( Z! l4 w; P& _3 ~请先阅读有关http代理协议的相关资料,转载请著明出处 ==========================================================================*/

#include "stdafx.h" #include "HTTPPROXY.h" #define FD_NOEVENT 0 // #define BACKUP 100 + L4 {& v& L! k7 I9 }#define MAXDATALEN 65535 int HttpListenPort; $ v- _9 q% r( L& F) USOCKET HttpListenSock; // 9 F: |' ^. I" _) V8 m% r( K! Gtypedef struct _CLIENTINFO{ SOCKET clientsock; SOCKET udpsock; , g6 I, G6 V* e: D. Csockaddr_in clientsock_addr; 3 e3 e- ?5 }' e8 \, V}CLIENTINFO,*LPCLIENTINFO; CLIENTINFO HttpClientInfo; 1 f+ n Z4 Z0 Y1 P// ' Y4 h. R" C$ p5 v; X% z0 atypedef struct _SOCKINFO{ 9 J' @+ [0 t# v. B2 DSOCKET sourcesock; * H0 P) U/ _* v5 PSOCKET destsock; }SOCKINFO,*LPSOCKINFO; ; X- J g) k/ P: U: Z- V, HSOCKINFO httpsockinfo; // # @: e: V) ]6 C( Vextern long GetSocketEventId(SOCKET remotesock); & n- Q c n; C9 S: cextern unsigned long GetLocalIp(); extern unsigned long GetDomainIp(char domainname[250]); 8 e. K* r" \0 `9 u% b5 Y/* long GetSocketEventId(SOCKET remotesock){ long EventId; HANDLE hevent; hevent=CreateEvent(NULL,0,0,0); 9 A/ w* A$ P3 Q$ V7 G7 vWSANETWORKEVENTS socket_events; ( y7 k, T4 m* h! v. i! KEventId=FD_NOEVENT; 3 p1 n& Y8 h8 |8 o" zif(WSAEventSelect(remotesock,hevent,FD_ACCEPT|FD_CONNECT|FD_READ|FD_WRITE|FD_CLOSE)==SOCKET_ERROR) return EventId; ' Q% D/ r$ m4 Z1 i! _WSAEnumNetworkEvents(remotesock,hevent,&socket_events); I2 K q0 R! r( A& G6 ?1 u. Oif(socket_events.lNetworkEvents!=0){ switch(socket_events.lNetworkEvents){ 7 y8 ?( }: _; l" G% _; g" q: `case FD_ACCEPT:EventId=FD_ACCEPT;break; 1 e @8 x8 P5 Z0 ]+ ^case FD_CONNECT:EventId=FD_CONNECT;break; case 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; . }- p/ `; B0 n} & G' k( `8 M' i7 e} else EventId=FD_NOEVENT; 3 M2 k. E& x$ U b4 j. Sreturn EventId; } : x- F. X9 B5 \1 |// unsigned long GetLocalIp() { char IP[MAX_PATH],*ip; ( L1 ]; \ i, J1 Kchar pc_name[80]; struct in_addr in; # |+ n' w) S5 I3 {- Qstruct hostent *host; # |& R% l' x. n4 {' @( OWORD wVersionRequested; WSADATA wsaData; wVersionRequested=MAKEWORD(2,0); ; q5 L! b! c' tip=IP; & h9 q0 R$ b( i# I' ostrcpy(ip,"Ip not get!"); if(WSAStartup(wVersionRequested,&wsaData)) return 0; if(gethostname(pc_name,80)==SOCKET_ERROR){ - \; s( Q; x2 G* I# z# e# uWSACleanup(); & V0 O; s$ ]+ @- b. Mreturn 0; ) h5 t2 ^3 r+ Y; I( g, o} if(!(host=gethostbyname(pc_name))){ 1 a, A# T7 v; p: u+ D7 zWSACleanup(); ) n& ?7 v6 C5 I8 s( ?return 0; } : R- }# Z! F9 Cin.s_addr=*((unsigned long *)host->h_addr_list[0]); strcpy(ip,inet_ntoa(in)); WSACleanup(); 1 X4 U+ o0 q: xreturn in.s_addr; } // : b# N# Q+ l' {. Cunsigned long GetDomainIp(char domainname[250]) { char IP[MAX_PATH],*ip; struct in_addr in; r0 q( W3 W b dstruct hostent *host; 8 ?1 \5 ^9 Q$ r" m6 d: ~WORD wVersionRequested; ' z: T! f) Y% L7 K8 DWSADATA wsaData; / ]7 |2 \ N+ jwVersionRequested=MAKEWORD(2,0); ) L; `% n# G/ ] Uip=IP; strcpy(ip,"Ip not get!"); if(WSAStartup(wVersionRequested,&wsaData)) return 0; if(!(host=gethostbyname(domainname))){ WSACleanup(); ; Z% D" }" n" z6 I/ Jreturn 0; 2 g5 D4 c% I* |$ u! ^' x} - I$ X G" F7 Z8 i$ e% ain.s_addr=*((unsigned long *)host->h_addr_list[0]); strcpy(ip,inet_ntoa(in)); ( F" t* a, b0 P+ w) NWSACleanup(); return in.s_addr; } */ // // UINT HttpReciveThread(LPVOID info){ //针对客户端的接收处理线程 * A" h$ g/ t7 z$ U: _LPSOCKINFO psockinfo; SOCKET sourcesock,destsock; : B# j3 S, G9 T* N" [. U1 ochar data[MAXDATALEN]; . o6 ^9 p/ ]) b P" o% A( u2 Qlong eventid; int datalen; psockinfo=(LPSOCKINFO)info; sourcesock=psockinfo->sourcesock; destsock=psockinfo->destsock; TRACE("deail recive thread ok!\r\n"); while(true){ . t7 W2 u) m! d; {; R W [# Q4 Teventid=GetSocketEventId(sourcesock); , |" m& }, p& f/ cswitch(eventid){ case FD_CLOSE: TRACE("s fdclosed\r\n"); / Q# Q" B( u) Iclosesocket(destsock); return 1; ; V: L( @8 I3 h1 g0 M1 d9 Nbreak; * l# a+ u3 C0 j0 F+ udefault:break; 0 z8 \7 a5 R6 e# @/ T} eventid=GetSocketEventId(destsock); : ^) S& s) R6 P8 o2 u7 k/ x. q" pswitch(eventid){ 2 M& Q3 v4 v0 p; Y' Scase FD_CLOSE: 0 b& N6 Z8 X+ x0 e$ D+ H( v' Eclosesocket(sourcesock); ! l; x/ D8 g0 ITRACE("d fdclosed\r\n"); return 1; break; default:break; & O. k2 D4 v. V% ]* i} 6 e; R' S4 P9 N+ ~; rdatalen=recv(sourcesock,data,sizeof(data),0); if(datalen==0){ closesocket(sourcesock); * ^% ]+ U9 Q7 q/ X; Y9 C4 Fclosesocket(destsock); TRACE("s fdclosed\r\n"); break; 1 S" c y4 ?6 f6 F# g [} % W+ F2 H9 r6 l- f/ e6 s# d Eif(datalen>0){ 9 ?' R9 _. Y9 D$ fwhile(!send(destsock,data,datalen,0)); } Sleep(1); } " Z, P2 b6 i6 Y, x' freturn 1; ) y- B( r/ [! e' i0 r} // UINT HttpSendThread(LPVOID info){ //针对远程端的接收处理线程 % F6 r/ C; _( y1 V+ Q. tLPSOCKINFO psockinfo; SOCKET sourcesock,destsock; char data[MAXDATALEN]; ( }1 n+ I. X6 f4 o4 t$ `% J& b0 @long eventid; int datalen; ! f. U3 }# k( ^+ U$ g; W+ Kpsockinfo=(LPSOCKINFO)info; ! S# Z0 B: g" xsourcesock=psockinfo->sourcesock; & J" w3 K! {8 p h% y) [destsock=psockinfo->destsock; 5 g5 c- o* k2 C# y4 T4 W1 ^$ J9 QTRACE("deail send thread ok!\r\n"); 3 q" k: ?7 r" c5 x5 ]# hwhile(true){ eventid=GetSocketEventId(sourcesock); switch(eventid){ case FD_CLOSE: TRACE("s fdclosed\r\n"); closesocket(destsock); return 1; ( r* O; b, |, F. a _3 Bbreak; default:break; 8 i X0 _ f- [, V} eventid=GetSocketEventId(destsock); % j8 O& P- p5 _$ H/ Z3 G& w# R/ K3 N! s* Qswitch(eventid){ / @ ~( _4 B( wcase FD_CLOSE: ' f7 J: B9 t- [+ N; ^* L, Oclosesocket(sourcesock); 7 Q1 I/ k% B" V7 z5 Y5 x, kTRACE("d fdclosed\r\n"); 5 m1 l' l' v( N( g* ereturn 1; a9 e% i2 w' m, q M0 Zbreak; default:break; 2 h7 e( G" F% T% E0 @% ?; H} / U3 r2 w% G U ~* J% ~. ~0 `datalen=recv(destsock,data,sizeof(data),0); ; j* r( y6 m/ [5 X5 V% m% }if(datalen==0){ 5 K; N; b' @; D9 y1 oclosesocket(sourcesock); 7 i! E) X3 m0 L: i' Wclosesocket(destsock); 0 {1 K2 ?- l- E& i- P9 [$ LTRACE("d fdclosed\r\n"); , ~) j3 {/ f$ C2 X% Dbreak; } 7 v' J: v( z& ?2 S! y* }. Y3 ~if(datalen>0){ ; r% {8 c1 ]6 i8 p9 J/ T6 _& D# Jwhile(!send(sourcesock,data,datalen,0)); } - J ?# W. M# I: U! _* E: lSleep(1); , H# I! a: V: \3 H% ?3 G; A} 3 I. g8 [) P% h' s% E6 Mreturn 1; } 7 C) v9 D" ^' r q/ \3 [$ X5 `// : g9 D' x' Q1 q4 L5 J, X// ' P: T+ H9 G# u" oUINT HttpProxyServerThread(LPVOID info){ //针对一次服务的线程 LPCLIENTINFO pclientinfo; ; }5 Z$ G6 a0 W6 [SOCKET connectsock,clientsock; sockaddr_in remotesock_addr; char data[MAXDATALEN],url[250],temp[250],httpurl[250],portnum[10]; " Y& v R- i' g# L% C) Pint datalen,i,index_start,index_end,port; , Q J8 M5 J9 H2 S7 H# J( ZCString HttpString,UrlString,PortString; pclientinfo=(LPCLIENTINFO)info; clientsock=pclientinfo->clientsock; 7 `3 I1 `* r7 x0 z7 H: h) |+ S% \ZeroMemory((void *)data,sizeof(data)); datalen=recv(clientsock,data,sizeof(data),0); if(datalen<=0){ , y8 {9 [% h0 E& m' ?. Rclosesocket(clientsock); 2 a- G4 v$ i* Z2 H* T) }return 0;

韩冰

} - _ J8 x% D% R/ |/ ~! l9 T" k* ~HttpString.Format("%s",data); 1 u) ?. L+ c" V5 ]- r# @UrlString=HttpString; ) C: D. M; W* F+ Q, ETRACE("get http string:\r\n"); " A, j( n% B/ Q5 J( L4 ZTRACE(HttpString); " h9 }8 a, x& m; M6 ~index_start=HttpString.Find("Host: ",0); //寻找url标记 if(index_start<=0){ 8 A; e; x% g% J& C4 `# R8 s7 wclosesocket(clientsock); 5 V+ n! s( W8 N8 G5 W! ireturn 0; } 4 G$ {3 u8 i3 g; R- R# C! G Bindex_end=HttpString.Find("\r\n",index_start); 8 T4 X! i4 v+ B+ ]. Y ^8 d5 fif(index_end<=0){ 3 P5 E& c z$ v* Z+ oclosesocket(clientsock); return 0; } 9 w4 G v( K% h* _8 e+ zUrlString=HttpString.Mid(index_start+6,index_end-index_start-6); //读取 url字符串 TRACE("\r\n get url:"); TRACE(UrlString); wsprintf(url,"%s",UrlString); strcpy(temp,url); , @2 _6 R- m( w" N2 a0 i' Wstrcat(temp,":"); ! b; k8 x- Z& G% a* L. s- u6 `datalen=strlen(temp); if(HttpString.Find("GET",0)==0){ //判断get命令，并处理 4 n( @% B+ u; N U! Nindex_start=HttpString.Find(temp,0); , v( R# V" ?' p6 n# u Astrcpy(httpurl,"http://"); if(index_start>0){ 6 } E: ?% d5 V; \" \index_end=HttpString.Find("/",index_start); - g# |' A! j& Nif(index_end<=0){ closesocket(clientsock); return 0; } PortString=HttpString.Mid(index_start+datalen,index_end-index_start-datalen); ) s4 S! r1 J( y6 Fport=atoi(PortString); strcat(httpurl,temp); , V7 T) ?# ^+ B2 R: Gitoa(port,portnum,sizeof(portnum)); " H* |) ?5 R) jstrcat(httpurl,portnum); , t* r) ^, u5 ?/ n6 L' r8 x, b) j( u, z zstrcat(httpurl,"/"); ) E" M6 D2 A3 D( I( |} else{ port=80; strcat(httpurl,url); 9 G4 b3 @: [9 G4 T0 X- Sstrcat(httpurl,"/"); + W% m5 l" ]$ P$ [} TRACE("get http url:%s\r\n",httpurl); 1 X; W# z g- G' zHttpString.Replace(httpurl,"/"); HttpString.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){ - O" ^) y K+ J' d: I6 s" {index_end=HttpString.Find(" ",index_start); if(index_end<=0){ / A# n* A& j+ O- \! y( b) U9 D* R: Aclosesocket(clientsock); 6 Y1 a9 `+ m2 G0 e hreturn 0; ' Z3 C$ o# C/ ?9 b( K/ V* K+ ~} PortString=HttpString.Mid(index_start+datalen,index_end-index_start-datalen); 6 x- M" O9 ^9 {* c$ d1 T1 Yport=atoi(PortString); ! U. G* I) M, q5 Q} / R- Y5 t4 z1 T/ o. qelse{ + z- k- r s" W* q9 k" fclosesocket(clientsock); return 0; } } 3 N l- T: T& [. r2 a( h4 }: \TRACE("get new http string:\r\n"); TRACE(HttpString); remotesock_addr.sin_family=AF_INET; remotesock_addr.sin_port=htons(port); remotesock_addr.sin_addr.S_un.S_addr=GetDomainIp(url); connectsock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); ' h7 R% I u" w6 A* R- b$ Bif(connect(connectsock,(const sockaddr *)&remotesock_addr,sizeof(remotesock_addr))==INVALID_SOCKET){ //连接远程主机 closesocket(clientsock); 8 E7 T' v) a2 _& qreturn 0; % ?2 i) f2 f% U8 D. u} + P+ H0 p# c/ h, o! JTRACE("\r\nconnect to remote ip ok\r\n"); ZeroMemory((void *)data,sizeof(data)); wsprintf(data,"%s",HttpString); datalen=strlen(data); X5 h @7 r O' ~) X! w' Z& Rif(HttpString.Find("CONNECT",0)<0) while(!send(connectsock,data,datalen,0)); else{ strcpy(data,"HTTP/1.0 200 Connection established\r\nProxy-agent: CHTTPPROXY V1.0 powered by shadow\r\n\r\n"); ! C0 _/ Y. n) H) {- m$ odatalen=strlen(data); 8 a7 H' u$ X; Q: N# w& Kwhile(!send(clientsock,data,datalen,0)); , B [$ U6 c& K6 h- g5 a( y} - z0 o+ d! j) N* shttpsockinfo.sourcesock=clientsock; , w4 s4 ]! O6 M0 y# ^5 M" v% Bhttpsockinfo.destsock=connectsock; AfxBeginThread(HttpReciveThread,(LPVOID)&httpsockinfo); //抛出处理线程 0 t# R* K4 q. S9 U% [9 }; XAfxBeginThread(HttpSendThread,(LPVOID)&httpsockinfo); // 3 O& a. n! T, |- USleep(100); return 1; } + H$ m+ g+ n$ R7 n4 {7 R. Q" c5 R// ; A9 l' n, D+ b9 QUINT StartHttpProxy(LPVOID info){ //端口监听线程 8 h" ?+ B. C, ^' V( K( U. `; cSOCKET NewSock; int socklen; sockaddr_in serversock,remotesock_addr; serversock.sin_family=AF_INET; serversock.sin_addr.S_un.S_addr=INADDR_ANY; # F. N3 i5 A6 E; ^serversock.sin_port=htons(HttpListenPort); HttpListenSock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); if(HttpListenSock==INVALID_SOCKET) return 0; if(bind(HttpListenSock,(const sockaddr *)&serversock,sizeof(serversock))==SOCKET_ERROR) return 0; ; G0 U- K; Z' flisten(HttpListenSock,BACKUP); socklen=sizeof(remotesock_addr); TRACE("start http proxy thread while\r\n"); while(true){ NewSock=accept(HttpListenSock,(sockaddr *)&remotesock_addr,&socklen); TRACE("waitting ok...\r\n"); if(NewSock==INVALID_SOCKET){ 3 H1 S+ j& s kSleep(1); continue; 1 J: S' |5 T% Y# o} $ m- a3 O& }; Q' \) M3 vZeroMemory((void *)&HttpClientInfo,sizeof(CLIENTINFO)); HttpClientInfo.clientsock=NewSock; & P; [9 K. s, GHttpClientInfo.clientsock_addr=remotesock_addr; TRACE("start proxy thread\r\n"); 3 p, A) |# |! J$ m, @ ^: ~2 AAfxBeginThread(HttpProxyServerThread,(LPVOID)&HttpClientInfo); - z. x& W" ^0 b7 BSleep(100); + I7 X3 I/ s. f% ?} return 1; + n# q1 U( o' [% m! C} * R- ~5 o2 ]; E, Q; T' F// CHTTPPROXY::CHTTPPROXY() * ?. t* i* t$ c4 A{ WSADATA WsaData; ; Q* x: v4 C0 J5 J5 f5 n8 D6 ^WORD wsaVer; # C/ p- ~* F: IwsaVer=MAKEWORD(2,0); / o, v, h3 r" v, \; iWsaStartupOk=false; if(WSAStartup(wsaVer,&WsaData)!=SOCKET_ERROR) WsaStartupOk=true; / Z- W4 @1 S \2 }# z}

CHTTPPROXY::~CHTTPPROXY() 5 x; q0 V9 C1 e9 i% K/ K3 ]* z{ " D0 Q6 u9 z1 B3 Z: _. kif(WsaStartupOk){ ; n' a. k* \5 }- [WSACleanup(); } , e0 F d) t- ]) }6 m}

int CHTTPPROXY::StartProxy(int listenport) { & e C9 s& {( N$ g: [HttpListenPort=listenport; 0 w* E% i4 W% _4 X! A& pAfxBeginThread(StartHttpProxy,(LPVOID)NULL); return 1; * d, }" A, J4 B3 C# D/ c}

/*========================================================================= + O( D8 @3 B1 f* M3 pFILE:HTTPPROXY.h 0 W: v* l/ o# m) S! j j% H==========================================================================*/ class CHTTPPROXY : K7 v5 M! {$ L# P. y{ G% X1 r# N0 c9 Y0 vpublic: 5 s& `: |' [: C0 s9 ]int StartProxy(int listenport); * m) Y0 O! t& Y" C& fbool WsaStartupOk; CHTTPPROXY(); virtual ~CHTTPPROXY();

};

/*========================================================================= 5 k5 l. W4 O- }7 f& lFILE:stdafx.h 6 I6 l. }% u/ _: }8 ^3 Q2 m==========================================================================*/ ' g" }" P0 w) }+ F3 l* |#include ! E8 b6 c' b7 R. L6 F8 U#include #include #include

- F' Q. ]& A' M. O2 _' X8 {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： 3 L7 x1 } k. M) [. {#paragma comment(lib,"wsock32.lib") 0 ?3 r1 _; q! @$ q: @#paragma comment(lib,"ws2_32.lib")

本代码在win2k和vc6.0下编译成功~~ 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; httpproxy.StartProxy(7890); 6 _( r: d3 m( ?* W( y0 c有问题mailto me！ ! D8 v0 Y- \: Z# s2 k