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标题: 打造自己的HTTP代理服务器 [打印本页]

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作者: 韩冰    时间: 2004-11-21 00:17
标题: 打造自己的HTTP代理服务器
/*========================================================================= 1 B' L; r6 i2 K1 W: BFILE:HTTPPROXY.cpp g3 \ j( m8 AHTTP Proxy v1.0 1 O+ G: Y- X/ V( a! m9 k' }powered by shadow 2004/11/14 my web:http://www.codehome.6600.org ! I' M' [+ e# P) f9 V$ P8 A, eQQ:176017352 请先阅读有关http代理协议的相关资料,转载请著明出处 & b1 I5 I* _! L==========================================================================*/ . V6 @ H+ _* J! H1 J

#include "stdafx.h" #include "HTTPPROXY.h" # ?' C( \ O$ J2 Q: ]2 h. j* Q$ O6 p#define FD_NOEVENT 0 - S/ ]( l4 \7 {# t" m// 8 k& [) D- v: T. u#define BACKUP 100 #define MAXDATALEN 65535 2 ?7 I7 I5 t& I3 ~# n, }int HttpListenPort; SOCKET HttpListenSock; // typedef struct _CLIENTINFO{ SOCKET clientsock; 9 Y& }! R% x1 ^SOCKET udpsock; sockaddr_in clientsock_addr; 1 j# \- N. p- M4 @3 M! R. o}CLIENTINFO,*LPCLIENTINFO; 9 H$ a' d8 ?6 A6 LCLIENTINFO HttpClientInfo; # S9 _4 z$ s t) x. H// typedef struct _SOCKINFO{ SOCKET sourcesock; SOCKET destsock; }SOCKINFO,*LPSOCKINFO; / \9 @9 ?! T/ \# N; I$ eSOCKINFO httpsockinfo; . m7 s( f1 @# P/ x; P* F. K// " n0 h# @( M# U3 B, K, xextern long GetSocketEventId(SOCKET remotesock); extern unsigned long GetLocalIp(); extern unsigned long GetDomainIp(char domainname[250]); /* / B O1 S! A0 i6 ~ @) \long GetSocketEventId(SOCKET remotesock){ 5 @, b# O& r) z% Rlong EventId; HANDLE hevent; hevent=CreateEvent(NULL,0,0,0); WSANETWORKEVENTS socket_events; EventId=FD_NOEVENT; if(WSAEventSelect(remotesock,hevent,FD_ACCEPT|FD_CONNECT|FD_READ|FD_WRITE|FD_CLOSE)==SOCKET_ERROR) return EventId; 4 ]! u1 X7 w% A- m. N; U, dWSAEnumNetworkEvents(remotesock,hevent,&socket_events); if(socket_events.lNetworkEvents!=0){ / b4 a( j5 G+ V& R8 |# Cswitch(socket_events.lNetworkEvents){ case FD_ACCEPT:EventId=FD_ACCEPT;break; 8 M$ K& m4 ~) ~* bcase FD_CONNECT:EventId=FD_CONNECT;break; % Z' L5 Y, p) q8 {* O. O" Ncase FD_READ:EventId=FD_READ;break; case FD_WRITE:EventId=FD_WRITE;break; 2 U3 r, f \* w; y" ~+ _case FD_CLOSE:EventId=FD_CLOSE;break; case FD_OOB:EventId=FD_OOB;break; 8 X& g( S' [% p! T+ K, E. ldefault:EventId=FD_NOEVENT;break; } $ U+ l/ ^/ f7 Q3 ]} else EventId=FD_NOEVENT; ! X5 j3 u) |0 L+ l. ]) ]; hreturn EventId; } // unsigned long GetLocalIp() 8 `# {2 J1 F2 {1 A{ char IP[MAX_PATH],*ip; char pc_name[80]; struct in_addr in; 4 j' I2 x% x# t& t, I2 s9 _struct hostent *host; WORD wVersionRequested; WSADATA wsaData; & U5 X* ?4 E8 twVersionRequested=MAKEWORD(2,0); 2 K$ Y" Z: f* h) Z1 }; j6 o! Oip=IP; strcpy(ip,"Ip not get!"); if(WSAStartup(wVersionRequested,&wsaData)) return 0; + ?: P( F) g! cif(gethostname(pc_name,80)==SOCKET_ERROR){ $ M/ [( d. [7 ]0 v* N( w4 N; CWSACleanup(); return 0; } * c! H# |2 @( c! j+ ^3 H* U4 Xif(!(host=gethostbyname(pc_name))){ ; l8 ]/ {' \. n9 Q9 Y- cWSACleanup(); return 0; 5 K* A+ m$ X9 P6 G' @5 B7 i} in.s_addr=*((unsigned long *)host->h_addr_list[0]); strcpy(ip,inet_ntoa(in)); WSACleanup(); return in.s_addr; } & k* d9 v6 G5 {; ~# i: Z2 q2 I2 C// 6 X( a4 K' b* V+ H! L! Lunsigned long GetDomainIp(char domainname[250]) & P, M O8 e+ u* A{ 8 A6 A8 a# N( ^( }# F" L9 {* Qchar IP[MAX_PATH],*ip; struct in_addr in; struct hostent *host; WORD wVersionRequested; WSADATA wsaData; wVersionRequested=MAKEWORD(2,0); ip=IP; strcpy(ip,"Ip not get!"); 5 h0 v. S# f) x k' rif(WSAStartup(wVersionRequested,&wsaData)) return 0; ' b4 {& R( S" K0 ?7 j% l' r, Y5 }0 mif(!(host=gethostbyname(domainname))){ 7 X. z& R7 R; X9 @0 l5 Z6 K7 R9 YWSACleanup(); return 0; } ' X0 g: @" b+ F$ s a, _in.s_addr=*((unsigned long *)host->h_addr_list[0]); - ]. y' d% z1 N3 H5 [strcpy(ip,inet_ntoa(in)); : e" d! j1 Z3 j* p! m; ]WSACleanup(); ( r) c: E' F# T$ G0 ?return in.s_addr; } " i* k( x2 v4 K2 q o% Z*/ // // ! J* ]- s" K2 C$ B4 u' H5 SUINT HttpReciveThread(LPVOID info){ //针对客户端的接收处理线程 LPSOCKINFO psockinfo; 8 A0 M1 R1 \$ R OSOCKET sourcesock,destsock; 1 k4 q9 V' V7 _: d2 L" {char data[MAXDATALEN]; / F9 g2 M$ R+ z( dlong eventid; int datalen; psockinfo=(LPSOCKINFO)info; sourcesock=psockinfo->sourcesock; 8 l6 v( _& p# s6 X! d/ V- }+ Mdestsock=psockinfo->destsock; - Q0 T3 B& [! |TRACE("deail recive thread ok!\r\n"); while(true){ & V% G8 o; e8 V4 q8 Zeventid=GetSocketEventId(sourcesock); 6 t$ O* r. p: aswitch(eventid){ case FD_CLOSE: TRACE("s fdclosed\r\n"); closesocket(destsock); return 1; break; : j: h6 w, ^, Y& cdefault:break; 3 m7 g+ l# B: R6 f$ R* r- M} eventid=GetSocketEventId(destsock); . d) _. n d6 e& h( V1 Eswitch(eventid){ 1 l6 u9 `6 O+ B) H* f' Lcase FD_CLOSE: & b1 G3 H. w8 w: K5 v( F. sclosesocket(sourcesock); 7 _1 ]- i0 q0 B [TRACE("d fdclosed\r\n"); return 1; # l) a6 n% }' i% ~break; W! w& q" g' E" I& N( |: r% Ddefault:break; ( h$ W7 E5 t1 h0 y$ C} $ |0 s9 b, {( P8 C. |3 Odatalen=recv(sourcesock,data,sizeof(data),0); 3 W4 q) ~- B; }1 D6 S) L$ c" v \if(datalen==0){ closesocket(sourcesock); closesocket(destsock); ( l) d; _" H+ E6 G6 A. z7 STRACE("s fdclosed\r\n"); ! R/ z5 \' g# @0 `. B0 W4 u( ^: Rbreak; 5 Y$ _' d9 |5 o} ; L6 B5 |( p! [5 G! n! T2 Qif(datalen>0){ while(!send(destsock,data,datalen,0)); } Sleep(1); / p1 g. {& a) x' E} return 1; , x; p: \# t/ _5 n& e! x} // / t" h. ^( A2 |4 bUINT HttpSendThread(LPVOID info){ //针对远程端的接收处理线程 1 w! E, }6 s( E2 q# ALPSOCKINFO psockinfo; SOCKET sourcesock,destsock; 8 I5 k6 U9 I) d$ U6 p6 bchar data[MAXDATALEN]; long eventid; int datalen; psockinfo=(LPSOCKINFO)info; sourcesock=psockinfo->sourcesock; destsock=psockinfo->destsock; $ @2 o9 |9 G% K- S6 q% A$ JTRACE("deail send thread ok!\r\n"); ' y! X, P6 w2 Q9 @3 s9 p! H; ywhile(true){ 8 X/ B, l/ }/ x F2 @eventid=GetSocketEventId(sourcesock); switch(eventid){ case FD_CLOSE: 8 m7 K0 g1 h3 k4 t6 J: R# d sTRACE("s fdclosed\r\n"); closesocket(destsock); return 1; break; default:break; 6 @0 g% `* \2 g/ x5 F} eventid=GetSocketEventId(destsock); 6 o& {$ o4 |, n0 Y% nswitch(eventid){ & Y4 @( s( H# M- fcase FD_CLOSE: * i* d% S/ c$ t" j$ G5 }6 Lclosesocket(sourcesock); TRACE("d fdclosed\r\n"); return 1; break; default:break; , p& X( \' R, c} datalen=recv(destsock,data,sizeof(data),0); 9 c( ?* R- k: M# I2 [, Y1 `if(datalen==0){ / m8 P/ u$ U% H8 vclosesocket(sourcesock); 9 ^* }; o9 Y a+ |! oclosesocket(destsock); 6 q9 d8 D# [, _! ~TRACE("d fdclosed\r\n"); break; } if(datalen>0){ : I- D( I7 ~/ f1 \1 V6 {while(!send(sourcesock,data,datalen,0)); } Sleep(1); K; J/ q/ k$ W6 `5 j} return 1; 0 X9 u. a) M. c$ I' l} : L" z' J W% v4 F b5 Y// ' V# Y$ \2 @/ E6 X// ! @# \* r# R% F( c' t v# nUINT HttpProxyServerThread(LPVOID info){ //针对一次服务的线程 LPCLIENTINFO pclientinfo; 0 _+ ~$ z/ ?& _- \. pSOCKET connectsock,clientsock; ) p2 G2 D! H) {! Usockaddr_in remotesock_addr; char data[MAXDATALEN],url[250],temp[250],httpurl[250],portnum[10]; int datalen,i,index_start,index_end,port; CString HttpString,UrlString,PortString; pclientinfo=(LPCLIENTINFO)info; clientsock=pclientinfo->clientsock; ZeroMemory((void *)data,sizeof(data)); 7 T" l( P5 P1 `( L; H& Ydatalen=recv(clientsock,data,sizeof(data),0); 8 Z3 w* i; K. P, o8 |/ dif(datalen<=0){ closesocket(clientsock); 5 D0 J1 p8 P: G- o. ^return 0; * g2 t' l. r/ x8 g# J/ ?& K

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作者: 韩冰    时间: 2004-11-21 00:19
} HttpString.Format("%s",data); UrlString=HttpString; TRACE("get http string:\r\n"); 0 E- c- U1 _4 h" T/ t/ E; BTRACE(HttpString); * [" S5 u2 [0 U, E3 b: Hindex_start=HttpString.Find("Host: ",0); //寻找url标记 6 W: F- a+ J5 u) ?9 h4 {if(index_start<=0){ closesocket(clientsock); 9 W" |3 w/ K$ freturn 0; / L5 s( b% [9 |} index_end=HttpString.Find("\r\n",index_start); if(index_end<=0){ . O) B! |; `! g& ~; B% `2 h4 [1 Fclosesocket(clientsock); 7 E5 J* n$ t) ureturn 0; 8 Q, X" J& l9 e5 c4 K} UrlString=HttpString.Mid(index_start+6,index_end-index_start-6); //读取 url字符串 6 F0 V0 ^, m1 r, vTRACE("\r\n get url:"); % o; [ X0 [& x/ N7 lTRACE(UrlString); % n# g) C( S, }6 E0 [2 Bwsprintf(url,"%s",UrlString); strcpy(temp,url); 1 ]/ f; _3 U7 H; O) `' ]strcat(temp,":"); ; N E/ t( Y- `3 G: E) B9 Vdatalen=strlen(temp); , O: |" e& J' [: J$ Nif(HttpString.Find("GET",0)==0){ //判断get命令，并处理 index_start=HttpString.Find(temp,0); : m1 @, Q3 j% [# Z8 s% w1 I. ~strcpy(httpurl,"http://"); if(index_start>0){ " I" v0 |8 e+ D( t! @, o" oindex_end=HttpString.Find("/",index_start); ; w9 B) O) W# P& r% K( I% B7 L' Hif(index_end<=0){ closesocket(clientsock); 7 ?6 k8 g o# A; d3 zreturn 0; } 5 H3 g' O5 z5 h7 Z" U; MPortString=HttpString.Mid(index_start+datalen,index_end-index_start-datalen); * E+ K+ ^# ?: N8 mport=atoi(PortString); strcat(httpurl,temp); . j4 Z0 L& n' y% H( v+ k& {itoa(port,portnum,sizeof(portnum)); strcat(httpurl,portnum); strcat(httpurl,"/"); + m/ s- l! h% M% t" \* `+ w1 t9 L} else{ port=80; strcat(httpurl,url); / e7 ~) t# B( Nstrcat(httpurl,"/"); } TRACE("get http url:%s\r\n",httpurl); 4 T6 T* E5 I: d% W: qHttpString.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 9 g k0 J9 v, [ b5 O: lindex_start=HttpString.Find(temp,0); if(index_start>0){ " S8 K9 [0 ~7 {" S3 `2 k _index_end=HttpString.Find(" ",index_start); . b5 F- K# A1 n* [' ~/ }if(index_end<=0){ 4 S7 K f- r8 F" b: b, eclosesocket(clientsock); return 0; } PortString=HttpString.Mid(index_start+datalen,index_end-index_start-datalen); port=atoi(PortString); } else{ closesocket(clientsock); return 0; } } TRACE("get new http string:\r\n"); # S' ~) I- |5 Y2 s7 MTRACE(HttpString); / |; L' i' B4 Y4 j3 i5 |( e8 a" [remotesock_addr.sin_family=AF_INET; % m( L; _7 U z2 Y( D5 rremotesock_addr.sin_port=htons(port); 6 r( e: L4 p9 _1 y6 P c% Kremotesock_addr.sin_addr.S_un.S_addr=GetDomainIp(url); 8 u, f- d+ W$ ?connectsock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); 6 |# a+ e4 ~) D1 x; y2 N$ pif(connect(connectsock,(const sockaddr *)&remotesock_addr,sizeof(remotesock_addr))==INVALID_SOCKET){ //连接远程主机 closesocket(clientsock); / R- X+ U( Z$ T+ qreturn 0; } TRACE("\r\nconnect to remote ip ok\r\n"); ZeroMemory((void *)data,sizeof(data)); wsprintf(data,"%s",HttpString); 8 b, u: l2 b6 n5 o, t7 Q# wdatalen=strlen(data); , ?* y3 @* H2 }8 i* H1 gif(HttpString.Find("CONNECT",0)<0) while(!send(connectsock,data,datalen,0)); 2 P3 P/ {- {, J! Y( f. D% helse{ @5 x# {& v, ^4 y" G9 ?strcpy(data,"HTTP/1.0 200 Connection established\r\nProxy-agent: CHTTPPROXY V1.0 powered by shadow\r\n\r\n"); 6 ~ Y* I r. Y" b9 ]datalen=strlen(data); while(!send(clientsock,data,datalen,0)); 5 O& S2 h5 n; A! \. j( E} 6 b+ }+ r6 W; W* v5 {4 h) ahttpsockinfo.sourcesock=clientsock; 8 d$ }/ k% L" A& uhttpsockinfo.destsock=connectsock; AfxBeginThread(HttpReciveThread,(LPVOID)&httpsockinfo); //抛出处理线程 AfxBeginThread(HttpSendThread,(LPVOID)&httpsockinfo); // 1 x( t1 U! E' [! z. l. VSleep(100); return 1; } // $ O# A# a5 T0 h6 B' IUINT StartHttpProxy(LPVOID info){ //端口监听线程 & H- g( z, A8 ^, W @- ^SOCKET NewSock; 6 j9 [2 z( D/ s7 ^+ {int socklen; & d# F0 q) S, N5 U- a7 |1 i( }sockaddr_in serversock,remotesock_addr; serversock.sin_family=AF_INET; , E# K W5 \" w( n# P* V: Jserversock.sin_addr.S_un.S_addr=INADDR_ANY; ! R- y( C* Y5 K, l/ Pserversock.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; listen(HttpListenSock,BACKUP); ( k! K- S+ K6 d6 o% B" Tsocklen=sizeof(remotesock_addr); TRACE("start http proxy thread while\r\n"); ! w$ R0 y# X/ z8 ~. W% D# h Awhile(true){ NewSock=accept(HttpListenSock,(sockaddr *)&remotesock_addr,&socklen); TRACE("waitting ok...\r\n"); if(NewSock==INVALID_SOCKET){ % {" g9 @6 p, g2 V$ n0 p5 b$ ~Sleep(1); continue; } ZeroMemory((void *)&HttpClientInfo,sizeof(CLIENTINFO)); 9 X! i4 n; F* _( u7 rHttpClientInfo.clientsock=NewSock; ( D& U/ q5 W0 c% ?& W2 Z8 h4 RHttpClientInfo.clientsock_addr=remotesock_addr; - R3 w( a- { j# _0 ^4 S! e, \TRACE("start proxy thread\r\n"); AfxBeginThread(HttpProxyServerThread,(LPVOID)&HttpClientInfo); " L; e7 w+ i/ e& BSleep(100); } return 1; 1 c1 j- c0 T- `5 `3 l! K* F, g* R} // CHTTPPROXY::CHTTPPROXY() { WSADATA WsaData; / q# x' j; \8 Y, B- S+ L" MWORD wsaVer; wsaVer=MAKEWORD(2,0); WsaStartupOk=false; ! z, Z0 d U! A% M/ bif(WSAStartup(wsaVer,&WsaData)!=SOCKET_ERROR) WsaStartupOk=true; }

CHTTPPROXY::~CHTTPPROXY() % T$ e/ u& [- \' E4 [* a{ 6 S: O! M4 ]0 m3 p( {# c5 Iif(WsaStartupOk){ " O Z' E! ]4 RWSACleanup(); } 9 v% N2 X. b5 E7 M2 `' C( q}

int CHTTPPROXY::StartProxy(int listenport) 2 U$ S5 W u* v1 F& ?4 ~7 h{ 7 N" {. |5 Q8 ?1 t- eHttpListenPort=listenport; / @5 M! Z8 M2 NAfxBeginThread(StartHttpProxy,(LPVOID)NULL); 9 Z6 j* Y. h6 C( _% u Q0 wreturn 1; : Y E% y4 X, f6 E, a8 k, O' j}

3 n. I1 l' r: p6 A9 Z/*========================================================================= ; ]* {" d/ d" S( U9 @$ c3 XFILE:HTTPPROXY.h ==========================================================================*/ class CHTTPPROXY c. O: c- p. l+ N8 z: C{ ! f% z( Y& T) ~public: int StartProxy(int listenport); bool WsaStartupOk; CHTTPPROXY(); , k' B n- P; h) U+ ?virtual ~CHTTPPROXY();

};

/*========================================================================= ( k1 z% |5 D. P* Z) QFILE:stdafx.h ==========================================================================*/ 0 R# a# @$ L( n% k7 h! g#include . `5 _2 S9 H; }3 m6 a$ |! X#include #include 9 K& X; |* i" {#include

& c9 g' n3 [& p$ j6 J5 S- _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") % | [) ?. |/ Y#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); ; X/ e4 w( A5 B6 P* h& r' m2 o有问题mailto me！

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