打造自己的HTTP代理服务器

韩冰

/*========================================================================= , ?; I( g$ w3 h6 CFILE:HTTPPROXY.cpp HTTP Proxy v1.0 powered by shadow 2004/11/14 1 _' B! x6 K6 G' U: A2 Q$ omy web:http://www.codehome.6600.org 0 r1 d8 G7 a; {) rQQ:176017352 请先阅读有关http代理协议的相关资料,转载请著明出处 0 |( i+ W3 s% w) A' s==========================================================================*/ # t/ v+ G" T n% c

#include "stdafx.h" 9 @& C& y% x4 q8 e. v% i#include "HTTPPROXY.h" ' @# W2 |& M/ I, o ^% g#define FD_NOEVENT 0 // #define BACKUP 100 #define MAXDATALEN 65535 , S1 h( B4 c" [6 j, ?int HttpListenPort; l3 ~; |8 c. d6 q M' zSOCKET HttpListenSock; 3 q8 I% V# g" T( e2 j0 Y// typedef struct _CLIENTINFO{ 1 _8 p/ ]' b! \' F( G. s: `SOCKET clientsock; ' I: v$ P" ^( KSOCKET udpsock; / ]# k @4 J. M' W. psockaddr_in clientsock_addr; }CLIENTINFO,*LPCLIENTINFO; CLIENTINFO HttpClientInfo; // typedef struct _SOCKINFO{ 3 P0 @. [# R* `* R: z3 ^ MSOCKET sourcesock; SOCKET destsock; }SOCKINFO,*LPSOCKINFO; SOCKINFO httpsockinfo; // extern long GetSocketEventId(SOCKET remotesock); ( ~7 ]3 R- X, Z' _) U. ^extern unsigned long GetLocalIp(); $ c1 G' b% v3 t3 M7 g0 v# ]+ v( [: ^extern unsigned long GetDomainIp(char domainname[250]); * r9 ?" p, c2 ^% W, v/* long GetSocketEventId(SOCKET remotesock){ long EventId; 9 W+ x" C" {7 P, r; g' vHANDLE hevent; 2 _ p) \; E+ i6 S7 [- Whevent=CreateEvent(NULL,0,0,0); 2 Y( { R2 Y6 b3 G& j2 lWSANETWORKEVENTS socket_events; 8 N$ C6 T; ]1 {7 w- Q! L/ }3 KEventId=FD_NOEVENT; 6 {& r5 ?, O2 H* E6 `; Fif(WSAEventSelect(remotesock,hevent,FD_ACCEPT|FD_CONNECT|FD_READ|FD_WRITE|FD_CLOSE)==SOCKET_ERROR) return EventId; 1 Y2 ? i- y3 {! F; [( \WSAEnumNetworkEvents(remotesock,hevent,&socket_events); if(socket_events.lNetworkEvents!=0){ switch(socket_events.lNetworkEvents){ * y+ U: c) y- c9 Xcase FD_ACCEPT:EventId=FD_ACCEPT;break; ! r3 {5 g5 |6 [# A* w, p: u$ zcase 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; 1 R5 p1 c( x% n6 Xdefault:EventId=FD_NOEVENT;break; } } else EventId=FD_NOEVENT; return EventId; } 7 ~% {8 P2 s0 D, g5 B// unsigned long GetLocalIp() { char IP[MAX_PATH],*ip; % H+ l: \: w* {7 J9 M, g& ychar pc_name[80]; * D! U, B c6 `; {struct in_addr in; : E0 a: o# q' Y7 w) W; \1 o) ?struct hostent *host; & Y; q5 K; r g. hWORD wVersionRequested; 9 p/ u7 t$ U8 C- o" k$ ^WSADATA wsaData; 5 P% o; j; L- NwVersionRequested=MAKEWORD(2,0); 0 P9 P3 j/ T# B4 u+ J7 q! \ip=IP; strcpy(ip,"Ip not get!"); 1 }" {. E% P" v5 }; Eif(WSAStartup(wVersionRequested,&wsaData)) return 0; % p+ A6 S% c# x- Eif(gethostname(pc_name,80)==SOCKET_ERROR){ WSACleanup(); ' K3 b( l$ r, S4 T1 o+ C9 |return 0; } 3 x( X4 h' {) g- b) M! i: hif(!(host=gethostbyname(pc_name))){ ! g& C, ]2 @7 c/ a( G: {) ^' ~WSACleanup(); 0 a( g& w# w% u& u6 c! Freturn 0; } in.s_addr=*((unsigned long *)host->h_addr_list[0]); , m, z- }! m* vstrcpy(ip,inet_ntoa(in)); WSACleanup(); return in.s_addr; } * i8 ^3 H$ B; j" n0 N) Z) \0 [// 2 V* F. H1 Y# f0 Munsigned long GetDomainIp(char domainname[250]) { char IP[MAX_PATH],*ip; struct in_addr in; struct hostent *host; WORD wVersionRequested; ) Z2 @5 }9 b# n, V6 gWSADATA wsaData; 1 ~9 Z; M5 K6 w1 ]* fwVersionRequested=MAKEWORD(2,0); ip=IP; 4 |( S4 ^+ P0 @# y: e5 g* cstrcpy(ip,"Ip not get!"); if(WSAStartup(wVersionRequested,&wsaData)) return 0; # j: n1 O6 Q: F0 ?if(!(host=gethostbyname(domainname))){ WSACleanup(); 5 c& ^: A/ y! N) q- O U! w5 Zreturn 0; , N% \& V4 n/ V2 ^& ^} 4 U) S4 `, l" d6 m; ]in.s_addr=*((unsigned long *)host->h_addr_list[0]); strcpy(ip,inet_ntoa(in)); WSACleanup(); ) \) `. T) y4 M. F; w1 `: t9 Mreturn in.s_addr; } */ 2 g6 s3 H6 A# W# S// % J2 }$ P3 K- S// 1 F, m" e3 L0 J9 m5 G. \UINT HttpReciveThread(LPVOID info){ //针对客户端的接收处理线程 6 K* ~; _8 A2 g/ E' Q; GLPSOCKINFO psockinfo; SOCKET sourcesock,destsock; $ u& E2 b) E) Ychar data[MAXDATALEN]; long eventid; int datalen; * i' P4 w: o0 I9 n6 H7 `psockinfo=(LPSOCKINFO)info; / A* c) j" y4 K; g( m6 H! c7 osourcesock=psockinfo->sourcesock; 4 R8 D0 S; W: ?* `- m- G3 ddestsock=psockinfo->destsock; $ }+ G- f! y6 y# w) X1 wTRACE("deail recive thread ok!\r\n"); while(true){ * Y: `3 v0 \* H& a; z9 zeventid=GetSocketEventId(sourcesock); switch(eventid){ # g* W0 K! T0 z* x! O: `case FD_CLOSE: TRACE("s fdclosed\r\n"); ) `" g" q Q* y* a* ^closesocket(destsock); 9 d7 s; H' q$ T& p" P) B' Vreturn 1; # G% W5 V, O4 r; b2 N. S1 obreak; 6 q6 Q; y1 E3 v. u7 H8 m6 Ydefault:break; } 3 z& M1 w% ~/ o! ^eventid=GetSocketEventId(destsock); * N4 p5 E: @& D/ `switch(eventid){ $ T" m/ ?# C7 O0 c- gcase FD_CLOSE: + V% k7 L6 n1 u, {# i+ D( m2 kclosesocket(sourcesock); 4 }' ?' W X, W% \3 p" GTRACE("d fdclosed\r\n"); return 1; break; default:break; ; Z M5 ]4 U- s. Q. k0 @5 L. L( i0 Q} , Y" b6 l t4 K$ ddatalen=recv(sourcesock,data,sizeof(data),0); ' @/ k8 x$ v& Qif(datalen==0){ ( k1 N0 w F$ E# z; B% e Tclosesocket(sourcesock); 8 p/ u: K) I D4 F& e+ V1 gclosesocket(destsock); 9 O& ^1 [# V$ ATRACE("s fdclosed\r\n"); 0 n ?0 m4 K. L- n" _6 Xbreak; 5 Z0 A8 Q4 n5 L0 Z+ L} 3 W+ U4 }3 h8 k- aif(datalen>0){ 2 {3 Y* l+ x& m" N4 g4 }0 \while(!send(destsock,data,datalen,0)); D, K9 u0 _- t8 L p; n! h P1 [9 c} ; p5 u8 z; `/ t, q; nSleep(1); 7 `, N8 m: H7 T& \; T3 o} ! X. T2 c$ I z! l& b4 I' sreturn 1; / C% M+ S5 e' j3 w' a; H8 A7 e} // 5 x6 h- A4 m# q2 @UINT HttpSendThread(LPVOID info){ //针对远程端的接收处理线程 ( x" ^' M* m) Q6 j- XLPSOCKINFO psockinfo; 2 i% I. W3 f8 `/ X, CSOCKET sourcesock,destsock; % a* F- ?" v8 p4 s# x: uchar data[MAXDATALEN]; long eventid; int datalen; psockinfo=(LPSOCKINFO)info; * A* J3 T* D Y, m: Zsourcesock=psockinfo->sourcesock; * S B, D5 U3 T; \: v; @' g% |destsock=psockinfo->destsock; 2 C" {4 r8 W mTRACE("deail send thread ok!\r\n"); while(true){ eventid=GetSocketEventId(sourcesock); switch(eventid){ + ]/ t' J- P6 H" ~: J3 L x0 S4 K$ Ncase FD_CLOSE: TRACE("s fdclosed\r\n"); closesocket(destsock); 1 o; t4 W, ^3 e) v) b- Hreturn 1; $ N. v+ s. b" {* {; Ybreak; 0 S/ @3 E6 Z- K8 @' Jdefault:break; / D7 |5 g) U5 F; w3 r; S0 O} 9 ^" @1 _ L: _6 n! Meventid=GetSocketEventId(destsock); switch(eventid){ 6 s" p, ^$ |9 _) J( R Z8 Fcase FD_CLOSE: - x# U6 e* t: ^+ G9 Tclosesocket(sourcesock); TRACE("d fdclosed\r\n"); return 1; break; ) G& x5 w3 {5 m4 W! Y+ ndefault:break; } datalen=recv(destsock,data,sizeof(data),0); if(datalen==0){ 1 Y# E) g4 K# \" M; hclosesocket(sourcesock); 8 S5 f" [8 g- z: `& \6 pclosesocket(destsock); TRACE("d fdclosed\r\n"); break; } 4 f4 e9 W/ ~8 z2 D9 g4 j4 X; L# D( fif(datalen>0){ 9 y; G. Z" O: k' G$ kwhile(!send(sourcesock,data,datalen,0)); % G- a) e2 r% F' N} ' t3 l" `; [ fSleep(1); } return 1; * X4 R {) j% q5 I$ w; G" C! V} 7 \5 ?6 ^5 Z7 k* I1 b+ A// // UINT HttpProxyServerThread(LPVOID info){ //针对一次服务的线程 : t$ k; Q- G: U6 NLPCLIENTINFO pclientinfo; " v- o U3 V! B6 A1 B; j4 Y+ ]SOCKET connectsock,clientsock; sockaddr_in remotesock_addr; char data[MAXDATALEN],url[250],temp[250],httpurl[250],portnum[10]; 5 g, `: t8 J" q# w E3 Iint datalen,i,index_start,index_end,port; CString HttpString,UrlString,PortString; 3 D; w% l6 o4 N5 o8 i; t! Zpclientinfo=(LPCLIENTINFO)info; % W+ p6 \4 L" ^! t, d* Q3 Xclientsock=pclientinfo->clientsock; ) Z2 u: t8 P) A: t0 G s; qZeroMemory((void *)data,sizeof(data)); ; y0 `/ |/ L2 Q& I# U" qdatalen=recv(clientsock,data,sizeof(data),0); if(datalen<=0){ 8 Z$ u, r. y, K9 i) xclosesocket(clientsock); return 0; w8 V- z! u- [( I

韩冰

} ; f' k8 m1 ]( ~7 L- HHttpString.Format("%s",data); " a' e8 m7 B4 s7 ?UrlString=HttpString; 2 M& C! P/ I( f/ ^TRACE("get http string:\r\n"); TRACE(HttpString); index_start=HttpString.Find("Host: ",0); //寻找url标记 3 S/ l4 ?% J; Y; qif(index_start<=0){ closesocket(clientsock); ! o% m; }% g7 w2 D5 Lreturn 0; } , G/ q6 F: e! i" p$ @5 I* k$ Oindex_end=HttpString.Find("\r\n",index_start); if(index_end<=0){ closesocket(clientsock); return 0; } 8 Z8 ^( a' L) p' ?8 A0 jUrlString=HttpString.Mid(index_start+6,index_end-index_start-6); //读取 url字符串 TRACE("\r\n get url:"); * L1 y' N q: c; XTRACE(UrlString); $ X, R6 b# Q; P/ C* ewsprintf(url,"%s",UrlString); strcpy(temp,url); strcat(temp,":"); 4 F7 d* G) d# j5 Pdatalen=strlen(temp); 7 d& c/ Z& ~% \2 xif(HttpString.Find("GET",0)==0){ //判断get命令，并处理 index_start=HttpString.Find(temp,0); strcpy(httpurl,"http://"); if(index_start>0){ index_end=HttpString.Find("/",index_start); & C$ Z* S+ ~6 E6 k; u* q9 eif(index_end<=0){ closesocket(clientsock); 8 K( d! S/ Q! vreturn 0; ! c5 R3 l9 {! \# P} PortString=HttpString.Mid(index_start+datalen,index_end-index_start-datalen); ' C* X3 a% P- \. ~6 \port=atoi(PortString); # a0 m; n; ]1 ?/ I @- kstrcat(httpurl,temp); 0 d& m: T) V: {6 bitoa(port,portnum,sizeof(portnum)); strcat(httpurl,portnum); strcat(httpurl,"/"); & R" m) q+ H2 h) e& |. W} / F( @/ W- M, Z9 Delse{ port=80; + o8 F# h4 A O$ Estrcat(httpurl,url); strcat(httpurl,"/"); } TRACE("get http url:%s\r\n",httpurl); HttpString.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 / E- _: @6 n/ T+ q: \index_start=HttpString.Find(temp,0); if(index_start>0){ 2 F R, q/ k% i, Z3 Sindex_end=HttpString.Find(" ",index_start); + T$ P3 T& {! f9 i( c: Qif(index_end<=0){ 9 W$ T6 f, l u+ Jclosesocket(clientsock); , d6 X4 F) O/ o% i0 Rreturn 0; } , Q. _) Y+ J* aPortString=HttpString.Mid(index_start+datalen,index_end-index_start-datalen); % E" Z8 J4 u' j+ }3 eport=atoi(PortString); ( e+ e2 K. \' K0 J7 W6 n+ t1 ?} else{ closesocket(clientsock); return 0; 1 e, [! Q0 p8 R+ j% j; \} I7 {1 n3 p a8 }" u} TRACE("get new http string:\r\n"); TRACE(HttpString); 5 m2 J2 P2 `% s$ p S9 sremotesock_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); # c9 d; _2 |# ?& O5 Kif(connect(connectsock,(const sockaddr *)&remotesock_addr,sizeof(remotesock_addr))==INVALID_SOCKET){ //连接远程主机 7 i8 B% L# R0 o* |7 aclosesocket(clientsock); return 0; + z! M- |2 v- J% j( {/ W. c} # B4 \6 |7 z T# r( b' |1 `3 g* K1 QTRACE("\r\nconnect to remote ip ok\r\n"); 5 p( p8 v& r. e; bZeroMemory((void *)data,sizeof(data)); wsprintf(data,"%s",HttpString); datalen=strlen(data); " j1 e U' K, A' j& l8 Pif(HttpString.Find("CONNECT",0)<0) while(!send(connectsock,data,datalen,0)); ' C; B4 g3 r# ~7 n U1 F& |else{ 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)); } $ x1 L2 c7 R% t1 Jhttpsockinfo.sourcesock=clientsock; httpsockinfo.destsock=connectsock; AfxBeginThread(HttpReciveThread,(LPVOID)&httpsockinfo); //抛出处理线程 1 n, C$ } v0 V% yAfxBeginThread(HttpSendThread,(LPVOID)&httpsockinfo); // 1 r8 u+ i, n7 o) G4 d; cSleep(100); 9 _- D+ G/ Z7 E3 l6 ~# t1 ^8 P' y6 Freturn 1; ' Q2 Z6 I: [6 t. a} 0 |" l* r& |' U7 m. U) G// UINT StartHttpProxy(LPVOID info){ //端口监听线程 9 b5 B/ I% L6 l5 a R Z! E3 `/ mSOCKET NewSock; ' p& D# B9 d7 ^0 S4 z1 }int socklen; ! [/ o/ ]' L: s& A1 Zsockaddr_in serversock,remotesock_addr; serversock.sin_family=AF_INET; 2 Q9 J* t4 }9 p" L; d( g2 c1 userversock.sin_addr.S_un.S_addr=INADDR_ANY; + M- x" X+ O, o) P+ Y/ g9 o! @: Oserversock.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; Q! E6 t7 f+ G7 A' T5 [. M) Plisten(HttpListenSock,BACKUP); P5 k8 M! s" r% _, Rsocklen=sizeof(remotesock_addr); TRACE("start http proxy thread while\r\n"); while(true){ NewSock=accept(HttpListenSock,(sockaddr *)&remotesock_addr,&socklen); . d- F3 L1 E1 i9 w0 P5 ~TRACE("waitting ok...\r\n"); if(NewSock==INVALID_SOCKET){ + H( Z; P, s+ ^3 [" O8 T6 ZSleep(1); continue; ) @; Y5 p8 r/ T6 e4 k" r5 _* {- w} # R- c! V# f& G& Y7 P& e4 qZeroMemory((void *)&HttpClientInfo,sizeof(CLIENTINFO)); HttpClientInfo.clientsock=NewSock; : Q) }7 t! i$ g/ a! e) P7 kHttpClientInfo.clientsock_addr=remotesock_addr; ! w1 H* K* `! Y+ M* q' eTRACE("start proxy thread\r\n"); * X3 l. Y" N- |! \9 q0 r; ZAfxBeginThread(HttpProxyServerThread,(LPVOID)&HttpClientInfo); 6 r. i7 e$ |* f& aSleep(100); & n3 \" _2 a6 p9 T4 O9 O} return 1; } // CHTTPPROXY::CHTTPPROXY() { WSADATA WsaData; ' Y! I1 ]$ e7 Z1 u7 W- `WORD wsaVer; ) X9 P2 A, @+ j- x4 b3 \. EwsaVer=MAKEWORD(2,0); 8 d( j/ z0 u4 ^1 I7 C, f- rWsaStartupOk=false; ) p1 B5 j/ w" P2 [, b; hif(WSAStartup(wsaVer,&WsaData)!=SOCKET_ERROR) WsaStartupOk=true; ! i1 x6 y( E& [( h7 Y}

CHTTPPROXY::~CHTTPPROXY() { if(WsaStartupOk){ 1 a# d. s4 O6 I2 B0 D" A% z! v# CWSACleanup(); } }

int CHTTPPROXY::StartProxy(int listenport) * B% C3 ^! Y8 }7 o{ & q9 K( d: Z9 j& O) s+ _HttpListenPort=listenport; AfxBeginThread(StartHttpProxy,(LPVOID)NULL); return 1; }

/*========================================================================= ' k: o k8 ]: cFILE:HTTPPROXY.h ==========================================================================*/ . g! s$ K; N: q! i6 a7 bclass CHTTPPROXY % f- d4 H. h8 r$ `4 ^; P- D{ public: `9 D z$ R+ X4 E; ?# T0 yint StartProxy(int listenport); % b: m7 h" i s" J% T3 K5 ubool WsaStartupOk; : M* J3 m0 I6 }5 Q: \8 nCHTTPPROXY(); virtual ~CHTTPPROXY();

};

/*========================================================================= , W* I5 Y6 f8 R# y. Q& _FILE:stdafx.h % L4 ?, N/ m! z% h3 N/ I. N==========================================================================*/ #include #include & L7 T, H, w% }3 h, c6 t7 D#include #include

9 @2 n+ ~: g: L( Z4 ?" p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： & K: Z" O* c# g& ^* e#paragma comment(lib,"wsock32.lib") #paragma comment(lib,"ws2_32.lib")

本代码在win2k和vc6.0下编译成功~~ " R9 s" n7 P- h/ P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; 2 W2 S# K# S* U7 x4 j9 Ihttpproxy.StartProxy(7890); 6 s5 {9 m3 \% u有问题mailto me！