打造自己的HTTP代理服务器

韩冰

/*========================================================================= FILE:HTTPPROXY.cpp 5 n" e1 b: y' _. x3 vHTTP Proxy v1.0 powered by shadow 2004/11/14 my web:http://www.codehome.6600.org QQ:176017352 请先阅读有关http代理协议的相关资料,转载请著明出处 3 ]4 h8 X! i. I/ [. B==========================================================================*/

#include "stdafx.h" ; T/ V1 X1 F9 [/ S% d2 K1 F#include "HTTPPROXY.h" & Z2 j R4 O J# B: ~) P+ a( M#define FD_NOEVENT 0 ( d; F; X w/ l, L// #define BACKUP 100 - x3 h) {& g/ w1 p#define MAXDATALEN 65535 ; V2 p/ A" S8 j5 w/ F$ {$ R8 A' jint HttpListenPort; 2 n9 Z4 t/ F. ]SOCKET HttpListenSock; // 9 c& a( j: X7 `5 e) x5 J9 [# utypedef struct _CLIENTINFO{ - Q2 P2 y' f: b8 W5 L4 W1 [SOCKET clientsock; 1 o/ ~6 y% W1 ^5 ]SOCKET udpsock; sockaddr_in clientsock_addr; . X" S" n$ }5 \6 _7 v2 [0 Z5 h}CLIENTINFO,*LPCLIENTINFO; 2 K7 F7 ~: }9 ^/ K' z" D3 aCLIENTINFO HttpClientInfo; // typedef struct _SOCKINFO{ SOCKET sourcesock; . C- X' m7 E6 @: l+ ?3 wSOCKET destsock; & e4 c7 u4 A8 X, E. w4 L: F% H}SOCKINFO,*LPSOCKINFO; , B& r' [3 a3 a3 W6 l/ l) lSOCKINFO httpsockinfo; // extern long GetSocketEventId(SOCKET remotesock); extern unsigned long GetLocalIp(); extern unsigned long GetDomainIp(char domainname[250]); , Y2 k8 U. V, W2 g/* f9 d) u% p! y% x) j' \$ \' plong GetSocketEventId(SOCKET remotesock){ % y: u- J$ I: R1 k1 g& [ Rlong EventId; HANDLE hevent; hevent=CreateEvent(NULL,0,0,0); 4 U5 ~0 K* p2 b; _WSANETWORKEVENTS socket_events; 5 `" d; v. {: dEventId=FD_NOEVENT; if(WSAEventSelect(remotesock,hevent,FD_ACCEPT|FD_CONNECT|FD_READ|FD_WRITE|FD_CLOSE)==SOCKET_ERROR) return EventId; WSAEnumNetworkEvents(remotesock,hevent,&socket_events); ! E% E6 D: v) W: p6 {9 L+ Wif(socket_events.lNetworkEvents!=0){ switch(socket_events.lNetworkEvents){ case FD_ACCEPT:EventId=FD_ACCEPT;break; % f0 x) j" D: Mcase FD_CONNECT:EventId=FD_CONNECT;break; case FD_READ:EventId=FD_READ;break; " [1 d: N* g. f- C# o+ tcase FD_WRITE:EventId=FD_WRITE;break; case FD_CLOSE:EventId=FD_CLOSE;break; ; }6 t. o. b- N( I: lcase FD_OOB:EventId=FD_OOB;break; # ?# F' o6 b! Gdefault:EventId=FD_NOEVENT;break; } 2 r/ t% d0 t t, K; A0 _9 Y} 6 Z: w; n# ]7 m* Z4 [6 o; Xelse EventId=FD_NOEVENT; return EventId; 0 Q6 ^- N U' R2 T# G8 M3 s- N} b m9 `0 Q/ h$ N' H# w, P// unsigned long GetLocalIp() & t! ?5 Q }; C8 o{ char IP[MAX_PATH],*ip; ( _4 o3 L1 x! P! N$ }6 _% w' Rchar pc_name[80]; struct in_addr in; struct hostent *host; WORD wVersionRequested; WSADATA wsaData; 6 G H, ]9 D/ a1 m2 |! JwVersionRequested=MAKEWORD(2,0); ip=IP; strcpy(ip,"Ip not get!"); * f3 H) ?$ M. ~' V Kif(WSAStartup(wVersionRequested,&wsaData)) return 0; if(gethostname(pc_name,80)==SOCKET_ERROR){ 1 n. Q- d# Q5 ~6 R$ XWSACleanup(); ! [) o6 O. g: J& G+ f( c0 b% }return 0; } if(!(host=gethostbyname(pc_name))){ WSACleanup(); return 0; } 4 M2 n' U; Y8 a$ Y3 Q1 @8 v7 [ b: O: \in.s_addr=*((unsigned long *)host->h_addr_list[0]); strcpy(ip,inet_ntoa(in)); . N: c r9 a; M. @WSACleanup(); ; R& J6 L! w; X! X0 `# N: ]return in.s_addr; ' v% s0 S: B: k: l} // unsigned long GetDomainIp(char domainname[250]) - M8 A- m# r. r! s9 ^{ 9 B, r3 N$ q! pchar IP[MAX_PATH],*ip; struct in_addr in; 9 w5 W- R8 a; u) s1 ?struct hostent *host; $ c1 V3 C; I# EWORD wVersionRequested; WSADATA wsaData; wVersionRequested=MAKEWORD(2,0); 4 J3 V6 z; e) j0 a* \ip=IP; strcpy(ip,"Ip not get!"); if(WSAStartup(wVersionRequested,&wsaData)) return 0; 7 c, y' P# \# H6 [! Dif(!(host=gethostbyname(domainname))){ WSACleanup(); 2 a4 j. K. W$ F1 Zreturn 0; } in.s_addr=*((unsigned long *)host->h_addr_list[0]); strcpy(ip,inet_ntoa(in)); * i4 q0 r b9 p# _! _0 f& HWSACleanup(); $ P9 ~! N* h) d G8 freturn in.s_addr; ' |, e1 J2 Z* D6 h* L" q2 d9 j# M4 A* o} */ // // UINT HttpReciveThread(LPVOID info){ //针对客户端的接收处理线程 LPSOCKINFO psockinfo; SOCKET sourcesock,destsock; + ]( H! M- I; Q: L# Xchar data[MAXDATALEN]; long eventid; " e( K/ x3 y) k: `" o# aint datalen; 9 ]* x7 X) `( T- s- }( wpsockinfo=(LPSOCKINFO)info; 0 s- K% U* w0 f' P, k8 y7 bsourcesock=psockinfo->sourcesock; & _4 v8 N% K/ _. I i4 zdestsock=psockinfo->destsock; " i/ q* N: h0 N! ? G! z0 MTRACE("deail recive thread ok!\r\n"); S. Y( J0 a* cwhile(true){ eventid=GetSocketEventId(sourcesock); switch(eventid){ : R/ x6 Q0 }) ]case FD_CLOSE: " e: {% A0 W6 a% ~9 `! y, v1 PTRACE("s fdclosed\r\n"); * Y _7 H& W8 r6 Pclosesocket(destsock); return 1; break; default:break; } eventid=GetSocketEventId(destsock); 2 a$ x h) n4 j+ x, Nswitch(eventid){ . M) G X5 w# A5 F: [9 w% |; _case FD_CLOSE: ) I0 z& r5 a0 v" L! i+ M9 Zclosesocket(sourcesock); * m( [ L6 @3 \TRACE("d fdclosed\r\n"); return 1; % Z9 ^$ ]2 l6 f9 g3 a5 A& B( W& Z* q; Ybreak; default:break; 3 }# }' a2 p( u} 5 q5 H" @( ~1 H4 \# |4 kdatalen=recv(sourcesock,data,sizeof(data),0); if(datalen==0){ / r$ A( r# I6 A2 T5 |9 ]; Z6 dclosesocket(sourcesock); closesocket(destsock); TRACE("s fdclosed\r\n"); p. R. n" z% c! a' dbreak; } . H: t1 j- v- ?9 L, jif(datalen>0){ while(!send(destsock,data,datalen,0)); } Sleep(1); ! @+ m2 x4 t5 F" H0 g/ H( G7 p} 0 n2 m: B5 j0 Nreturn 1; } / T3 e! s7 e+ a7 o& U8 @// + s) E( [1 A/ d* hUINT HttpSendThread(LPVOID info){ //针对远程端的接收处理线程 LPSOCKINFO psockinfo; ; i6 H3 `9 i# U- ~SOCKET sourcesock,destsock; * L0 t. k3 Y; Fchar data[MAXDATALEN]; long eventid; int datalen; 7 l1 j4 y% K3 G6 B) X; Tpsockinfo=(LPSOCKINFO)info; sourcesock=psockinfo->sourcesock; destsock=psockinfo->destsock; TRACE("deail send thread ok!\r\n"); ' i# q/ T' L T5 d6 Lwhile(true){ 2 ^1 X5 L& _8 w' Eeventid=GetSocketEventId(sourcesock); switch(eventid){ case FD_CLOSE: 3 b# I; O$ D) G# I) NTRACE("s fdclosed\r\n"); closesocket(destsock); # ~) o8 i+ F/ E0 hreturn 1; 1 T5 Q* E. T/ |2 p, \" Qbreak; default:break; } 3 R/ H5 b7 P5 ?3 ^- @, @eventid=GetSocketEventId(destsock); switch(eventid){ $ i1 [$ {% G C% H* C6 B& e! Scase FD_CLOSE: 8 V( |9 m! f) h3 Xclosesocket(sourcesock); TRACE("d fdclosed\r\n"); * }! p! f4 g; v& V- F! }1 e9 ~- ereturn 1; * {: Y9 r1 n5 s' `7 b1 Zbreak; default:break; } 4 R g, m, y, q. K0 _& {8 P ndatalen=recv(destsock,data,sizeof(data),0); if(datalen==0){ ; X$ n0 Y9 x! I0 a8 Wclosesocket(sourcesock); 3 `& s- K9 c! d7 }& _7 P2 O. g; vclosesocket(destsock); 1 d- G5 |2 n6 o L( ?4 A3 r, hTRACE("d fdclosed\r\n"); break; ; J0 _" P" ?) A# M. D/ T; k& @" \} : s0 K# @; l/ Tif(datalen>0){ & I. F% C% Y) d1 e/ fwhile(!send(sourcesock,data,datalen,0)); } Sleep(1); } 7 W# r" m2 c" K; G. oreturn 1; . k$ t. \: z4 Y% R} % t5 w4 ?, _4 |8 E+ A3 j; l' f# m// // UINT HttpProxyServerThread(LPVOID info){ //针对一次服务的线程 LPCLIENTINFO pclientinfo; SOCKET connectsock,clientsock; % S' }" t0 b! m' G6 Nsockaddr_in remotesock_addr; char data[MAXDATALEN],url[250],temp[250],httpurl[250],portnum[10]; W' c+ k' [( k" K! g' M5 N) Cint datalen,i,index_start,index_end,port; CString HttpString,UrlString,PortString; pclientinfo=(LPCLIENTINFO)info; clientsock=pclientinfo->clientsock; ZeroMemory((void *)data,sizeof(data)); & u& Q: s9 d7 Z0 l5 wdatalen=recv(clientsock,data,sizeof(data),0); 8 A; Q3 N) g5 l" ^$ D s* i; m* P2 Qif(datalen<=0){ * ^+ E8 j0 d+ Y+ o& Sclosesocket(clientsock); return 0; : u% f% M" \0 `

韩冰

} HttpString.Format("%s",data); UrlString=HttpString; 2 ]. S" u' B x7 L+ w4 RTRACE("get http string:\r\n"); TRACE(HttpString); 0 {4 v7 m+ \0 }index_start=HttpString.Find("Host: ",0); //寻找url标记 if(index_start<=0){ closesocket(clientsock); ' { }7 v/ t7 J; }- creturn 0; $ ^# O9 u6 h# M# [, g5 O& q} ( S7 f. V# f9 M1 Bindex_end=HttpString.Find("\r\n",index_start); & S: Y" S* V1 ~. A7 W& K, Vif(index_end<=0){ " r5 Z. C# G" Y' ~# U t, S sclosesocket(clientsock); return 0; . z- c1 {2 |& ]1 D' g# n} UrlString=HttpString.Mid(index_start+6,index_end-index_start-6); //读取 url字符串 TRACE("\r\n get url:"); 4 B3 A5 W. o$ f eTRACE(UrlString); wsprintf(url,"%s",UrlString); strcpy(temp,url); 2 T& y8 ~& a+ U- n) r# X6 S! istrcat(temp,":"); datalen=strlen(temp); if(HttpString.Find("GET",0)==0){ //判断get命令，并处理 index_start=HttpString.Find(temp,0); 5 t( b! K8 s2 k. _strcpy(httpurl,"http://"); if(index_start>0){ 3 b1 E( H+ D0 Q6 M7 D' A( r' ~index_end=HttpString.Find("/",index_start); L6 g8 ~6 x( m8 T2 a. ~1 bif(index_end<=0){ closesocket(clientsock); ' t) T. _ n' W# Freturn 0; } n4 f9 c i0 _. \: v% _) I* iPortString=HttpString.Mid(index_start+datalen,index_end-index_start-datalen); : `( q& Y% y' h+ ~5 o2 O1 @port=atoi(PortString); strcat(httpurl,temp); itoa(port,portnum,sizeof(portnum)); strcat(httpurl,portnum); strcat(httpurl,"/"); 6 M. |! h4 c: ]. m% ~; m} 5 j0 ]' R2 V- oelse{ port=80; - [- K9 p4 d/ Astrcat(httpurl,url); strcat(httpurl,"/"); 4 o K4 I$ I9 ? B2 L/ G} TRACE("get http url:%s\r\n",httpurl); HttpString.Replace(httpurl,"/"); . S8 ?3 N2 c5 k8 c! FHttpString.Replace("Proxy-",""); " W4 b( E0 P7 x+ CHttpString.Replace("HTTP/1.0","HTTP/1.1"); \/ C3 Y9 \3 Q; Z# m} else if(HttpString.Find("CONNECT",0)==0){ //判断connect命令并处理 + f" Q2 y9 N3 S* Kindex_start=HttpString.Find(temp,0); if(index_start>0){ * N6 J2 f1 G. P/ o9 j# q$ x/ Oindex_end=HttpString.Find(" ",index_start); if(index_end<=0){ % u+ L& f5 ]2 Z7 hclosesocket(clientsock); return 0; } PortString=HttpString.Mid(index_start+datalen,index_end-index_start-datalen); port=atoi(PortString); } / b! m9 W' J: L' t v0 Eelse{ closesocket(clientsock); ( e- i6 C: r" y5 A hreturn 0; 6 e( M# K S3 e5 R: I! l& b i} : V# f2 U& Q! ?8 a/ z2 e& r, T} $ F/ ]4 U$ }1 i$ E4 @5 R# `+ TTRACE("get new http string:\r\n"); : [" Z3 ` C6 xTRACE(HttpString); 8 S2 ]2 B) B, N# s' Rremotesock_addr.sin_family=AF_INET; : e' z6 d2 S/ v: iremotesock_addr.sin_port=htons(port); remotesock_addr.sin_addr.S_un.S_addr=GetDomainIp(url); $ R, t0 r, Z( }connectsock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); , y8 {5 c# ?/ v6 |if(connect(connectsock,(const sockaddr *)&remotesock_addr,sizeof(remotesock_addr))==INVALID_SOCKET){ //连接远程主机 closesocket(clientsock); 6 s3 F# {2 L# S5 L6 Rreturn 0; } TRACE("\r\nconnect to remote ip ok\r\n"); * D% o" \; k f' F$ vZeroMemory((void *)data,sizeof(data)); wsprintf(data,"%s",HttpString); datalen=strlen(data); * Z7 h6 e2 Y& D+ n, C) }if(HttpString.Find("CONNECT",0)<0) while(!send(connectsock,data,datalen,0)); ; k" [' e8 R, c' ]1 J4 y3 J! v! xelse{ , R' n/ }& J. Q- Xstrcpy(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)); : u6 y6 k- K/ F. T/ \6 p} 1 @* `6 Q: d8 Q7 Rhttpsockinfo.sourcesock=clientsock; 4 m8 l, w5 u0 ihttpsockinfo.destsock=connectsock; " m+ O6 N( J* [: A1 j- d9 a+ U2 J j( r0 SAfxBeginThread(HttpReciveThread,(LPVOID)&httpsockinfo); //抛出处理线程 AfxBeginThread(HttpSendThread,(LPVOID)&httpsockinfo); // Sleep(100); - Q+ c3 I4 b, z9 b* B/ preturn 1; & m9 B- z% \1 P$ I} // UINT StartHttpProxy(LPVOID info){ //端口监听线程 SOCKET NewSock; int socklen; sockaddr_in serversock,remotesock_addr; 5 }* ?) O" W* D6 {1 _serversock.sin_family=AF_INET; ; w. O7 Y; O0 userversock.sin_addr.S_un.S_addr=INADDR_ANY; serversock.sin_port=htons(HttpListenPort); HttpListenSock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); ) \. C1 O( e# {9 ]$ h: P' b" xif(HttpListenSock==INVALID_SOCKET) return 0; if(bind(HttpListenSock,(const sockaddr *)&serversock,sizeof(serversock))==SOCKET_ERROR) return 0; ( W! K: Q3 ~) \- S) @listen(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){ ) P# o J- K1 H$ C1 J# k+ NSleep(1); 9 j" P* ^4 m3 X9 L7 O/ Z4 I* \/ icontinue; 5 w f- v& `2 L$ F} ZeroMemory((void *)&HttpClientInfo,sizeof(CLIENTINFO)); HttpClientInfo.clientsock=NewSock; ( H6 S3 e/ E& h: u- \8 v* \6 yHttpClientInfo.clientsock_addr=remotesock_addr; , b* y, C4 N* @2 n* XTRACE("start proxy thread\r\n"); AfxBeginThread(HttpProxyServerThread,(LPVOID)&HttpClientInfo); Sleep(100); 9 G1 t- c* Q3 C( ~2 k7 O" w% h} return 1; ) ], o3 t/ i9 g. S. k. u7 \0 s} $ I% A) O0 A# e) f' E b& \: o6 o0 u// . X5 ?$ x& `2 Z4 K4 }& [, lCHTTPPROXY::CHTTPPROXY() 6 h0 G9 \+ v" x: O$ `. q G{ 6 I1 m% G- `- ]7 fWSADATA WsaData; WORD wsaVer; 7 K' w+ m5 G: Z" HwsaVer=MAKEWORD(2,0); WsaStartupOk=false; , l+ @& A0 }( c7 `# Iif(WSAStartup(wsaVer,&WsaData)!=SOCKET_ERROR) WsaStartupOk=true; % \9 T0 f: J$ r, @# B}

CHTTPPROXY::~CHTTPPROXY() { ; l; u- b2 V% M% g* R( Cif(WsaStartupOk){ 6 ]* r( L" `& z, iWSACleanup(); 7 B2 s! M4 V6 R} {" R; s) K, d9 _4 Q- x H}

int CHTTPPROXY::StartProxy(int listenport) 2 g! u/ J! a: a. l1 i{ * L8 S: r6 u. `HttpListenPort=listenport; AfxBeginThread(StartHttpProxy,(LPVOID)NULL); return 1; 1 x% b; A) }0 ]" ~$ V; Z0 B}

/*========================================================================= FILE:HTTPPROXY.h ==========================================================================*/ ^) h @. n! S/ u& e0 ?) H( oclass CHTTPPROXY 1 [+ @/ J9 R: e% Y0 c5 A% L{ public: V) u3 u. o& D# a1 fint StartProxy(int listenport); 5 H( F* X1 A3 ~* Tbool WsaStartupOk; : d2 B$ Q- S; ?, O! V) m! qCHTTPPROXY(); 7 Y; a7 L* C. P% h* D6 L7 c& L) Nvirtual ~CHTTPPROXY();

};

/*========================================================================= FILE:stdafx.h / w7 f! v% }: |( x! @5 Y6 _==========================================================================*/ 0 Z# f" |6 a2 |& S#include #include #include #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") & N: \. U: j7 i#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: * a1 h) Y: W7 {% \- O2 o6 iCHTTPPROXY httpproxy; 8 I7 L+ p8 C3 j& |1 Y- [# K# w; A8 vhttpproxy.StartProxy(7890); 6 r& n" S# g9 P8 W# {. `! ?' ]有问题mailto me！