打造自己的HTTP代理服务器

韩冰

/*========================================================================= FILE:HTTPPROXY.cpp HTTP Proxy v1.0 powered by shadow 2004/11/14 my web:http://www.codehome.6600.org % M+ N* t3 x( [9 D+ qQQ:176017352 3 f" ], e) ^7 D- S2 I2 T请先阅读有关http代理协议的相关资料,转载请著明出处 # E0 w5 v `# h# N5 s==========================================================================*/ ( z* s. c6 k" _. D% ^5 W' z" |

#include "stdafx.h" / h* p" T5 Q, i2 f+ e3 u n#include "HTTPPROXY.h" #define FD_NOEVENT 0 / f% Q1 i( i( B0 x% Y, F, i4 o// #define BACKUP 100 4 Q: L1 H/ d- h1 k& ~#define MAXDATALEN 65535 # T9 j! I& L& m Vint HttpListenPort; 9 [9 Q8 C- j* b! W& v7 D1 v# tSOCKET HttpListenSock; 7 }2 @) a% E- q1 `+ E ]// * S8 t4 l- a/ a/ @typedef struct _CLIENTINFO{ + u9 r9 A$ M' n% eSOCKET clientsock; 1 O& U3 m }& B" }9 v" D$ VSOCKET udpsock; + n h0 m! z, A% ^, ?. V i" Isockaddr_in clientsock_addr; 3 d& w' r* c8 P' V- h4 A}CLIENTINFO,*LPCLIENTINFO; 9 m! M3 @5 v; L, A3 ICLIENTINFO HttpClientInfo; ; a7 |" ^* v7 V/ s4 R// ' P3 e6 _. H! {* htypedef struct _SOCKINFO{ / @$ F0 N: b4 d2 K( ]SOCKET sourcesock; 6 q+ T1 z. E: H4 \4 J. S' ~7 NSOCKET destsock; }SOCKINFO,*LPSOCKINFO; SOCKINFO httpsockinfo; . P7 `- U6 k5 H: J& J0 d# ]// % M j( T2 D3 j; F4 ^! sextern long GetSocketEventId(SOCKET remotesock); ( w, Q, j/ H- G' u6 p0 P0 q: ^extern unsigned long GetLocalIp(); ) ?8 \3 o- t& J7 eextern unsigned long GetDomainIp(char domainname[250]); /* & [: [& O) v: ~* V& Clong GetSocketEventId(SOCKET remotesock){ / R, _& e0 g& m, _/ r) y blong EventId; 3 C0 p# e$ N; x. i1 k. M1 OHANDLE hevent; ) A, x- d$ B3 }) ?1 _4 C y: A ]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; WSAEnumNetworkEvents(remotesock,hevent,&socket_events); 1 G) ~% \. k' R! a: K% V j" Rif(socket_events.lNetworkEvents!=0){ % m7 C7 v' i: ^/ @switch(socket_events.lNetworkEvents){ case FD_ACCEPT:EventId=FD_ACCEPT;break; 3 A; { B; @; l% c9 R6 Pcase FD_CONNECT:EventId=FD_CONNECT;break; case FD_READ:EventId=FD_READ;break; ; K$ Y" q6 j! v+ V2 Zcase FD_WRITE:EventId=FD_WRITE;break; case FD_CLOSE:EventId=FD_CLOSE;break; case FD_OOB:EventId=FD_OOB;break; ' ]) n. B g) q8 y$ f8 R1 ]default:EventId=FD_NOEVENT;break; 3 [/ I2 H" l( Z9 w} } + u' H* M+ ?" z( x0 q) Delse EventId=FD_NOEVENT; return EventId; } 3 _- m2 {2 V0 Y6 ~ K' f// unsigned long GetLocalIp() { - l/ `/ z+ F' C5 H% U3 Gchar IP[MAX_PATH],*ip; ! a' U( H* s8 {1 U& Kchar pc_name[80]; * t* A x5 N2 s# F+ tstruct in_addr in; struct hostent *host; 6 W6 M9 Q1 c6 O+ [5 ~9 Y, MWORD wVersionRequested; WSADATA wsaData; wVersionRequested=MAKEWORD(2,0); 3 I: g3 J; V- \3 f) l& jip=IP; strcpy(ip,"Ip not get!"); if(WSAStartup(wVersionRequested,&wsaData)) return 0; 1 {/ [" k4 N0 K; T( dif(gethostname(pc_name,80)==SOCKET_ERROR){ ; F8 v8 h/ t0 h+ l# tWSACleanup(); return 0; } if(!(host=gethostbyname(pc_name))){ . v+ U& k. g1 d; ^WSACleanup(); / z: z( y G4 s( M4 ereturn 0; } * K& ^1 |9 p5 k2 n+ X# Din.s_addr=*((unsigned long *)host->h_addr_list[0]); strcpy(ip,inet_ntoa(in)); 3 m W0 K8 d. c- {5 {2 C7 t4 MWSACleanup(); ! N) U1 _ E# ]- W O4 [* Lreturn in.s_addr; / J% L2 Y e5 s6 X+ D" `; J' v9 c} + Y5 s0 R8 F+ O6 C// unsigned long GetDomainIp(char domainname[250]) { char IP[MAX_PATH],*ip; struct in_addr in; , ?0 b. o8 ^+ q/ B. _ jstruct hostent *host; WORD wVersionRequested; WSADATA wsaData; wVersionRequested=MAKEWORD(2,0); / a5 B7 j% y" i6 n! vip=IP; strcpy(ip,"Ip not get!"); if(WSAStartup(wVersionRequested,&wsaData)) return 0; if(!(host=gethostbyname(domainname))){ - U- }- e3 b, x0 S6 L/ D- P) m7 NWSACleanup(); / K- V! U& n; }5 ireturn 0; } ' E7 `8 m) p2 W# n1 l! U5 Ain.s_addr=*((unsigned long *)host->h_addr_list[0]); strcpy(ip,inet_ntoa(in)); WSACleanup(); return in.s_addr; } */ ! @7 e- V+ C7 X// 3 t6 h# K3 h" C% N* G* d: e// 9 h- D# Z0 ]' O4 G8 _UINT HttpReciveThread(LPVOID info){ //针对客户端的接收处理线程 LPSOCKINFO psockinfo; + `# ^3 U, }: y" j: U. VSOCKET sourcesock,destsock; % {" [6 J% M2 Z9 ` {6 Z; Hchar data[MAXDATALEN]; long eventid; 4 ^6 y& m# s" R2 p$ Yint datalen; 0 }! E5 O; [* g6 Fpsockinfo=(LPSOCKINFO)info; sourcesock=psockinfo->sourcesock; destsock=psockinfo->destsock; ; v" Z( x! A4 i& A5 x4 ]TRACE("deail recive thread ok!\r\n"); while(true){ Z' z! y' ~2 Zeventid=GetSocketEventId(sourcesock); switch(eventid){ case FD_CLOSE: 9 o) b( B5 T# q& f% j* x2 B HTRACE("s fdclosed\r\n"); ' U# S1 l2 l6 }7 X" E3 yclosesocket(destsock); * M( K/ P$ X) h+ [7 i, Wreturn 1; break; . F, ~6 O6 x6 c( C% c2 Y7 Sdefault:break; & n- l) @) K& r} eventid=GetSocketEventId(destsock); switch(eventid){ % q; H% A! M& o7 v" [9 C% ~case FD_CLOSE: - e: x% d) x; T) L L& uclosesocket(sourcesock); ! Q6 _6 I/ N( r& |" R4 KTRACE("d fdclosed\r\n"); return 1; break; default:break; } ' Z! g/ z4 ]' n8 g( pdatalen=recv(sourcesock,data,sizeof(data),0); 2 c5 T+ I* ~! W# T0 e: @if(datalen==0){ closesocket(sourcesock); closesocket(destsock); , x" k! e4 M; _, z- s3 LTRACE("s fdclosed\r\n"); break; 8 l6 ?5 z' Z4 G; V& R} ( `; \( T* A/ r" B; {if(datalen>0){ 6 `" {+ c$ N4 A. P9 Xwhile(!send(destsock,data,datalen,0)); ; c) T1 r: c* R0 ]% F) C0 l$ }2 o} Sleep(1); } return 1; 8 @8 L: R; r' l& s} ; l; n) D8 H4 V7 |& k; j9 U// # A# n( n. l4 f; RUINT HttpSendThread(LPVOID info){ //针对远程端的接收处理线程 LPSOCKINFO psockinfo; 3 W4 C) r! @# d+ A9 U9 zSOCKET sourcesock,destsock; char data[MAXDATALEN]; 6 T3 T, B7 p% \: K8 t' m$ olong eventid; + }# G6 B# w& U& ]int datalen; ! W! C) x' s6 t7 T0 {psockinfo=(LPSOCKINFO)info; sourcesock=psockinfo->sourcesock; destsock=psockinfo->destsock; TRACE("deail send thread ok!\r\n"); while(true){ * _2 D( `2 ~2 O/ H' _$ Deventid=GetSocketEventId(sourcesock); switch(eventid){ case FD_CLOSE: TRACE("s fdclosed\r\n"); closesocket(destsock); return 1; break; 8 L+ u* U; J7 e( l: ?8 n+ }default:break; w% q) J) s# Y- U; J, D} eventid=GetSocketEventId(destsock); switch(eventid){ case FD_CLOSE: & i( m! M( W) `9 b1 c! hclosesocket(sourcesock); , p) p" d4 ?) I1 i( |; w6 ITRACE("d fdclosed\r\n"); return 1; break; ) p. X! V, a9 e$ L, {default:break; } " j$ e3 o5 I2 i2 \; ~) edatalen=recv(destsock,data,sizeof(data),0); if(datalen==0){ 4 e3 y5 V& J9 @) v! {) bclosesocket(sourcesock); closesocket(destsock); TRACE("d fdclosed\r\n"); break; ( P& ]0 l8 }3 j& G+ G5 f1 a7 P} if(datalen>0){ ( f8 z4 j: F% n" M4 |- M" bwhile(!send(sourcesock,data,datalen,0)); } 6 b a. G, G8 K( ]7 p5 @" ?# h( {Sleep(1); 9 b0 O. c6 W& G} return 1; 4 Z0 R$ V+ Z9 S5 }} // // UINT HttpProxyServerThread(LPVOID info){ //针对一次服务的线程 $ G3 _5 t! z4 S2 SLPCLIENTINFO pclientinfo; SOCKET connectsock,clientsock; ! Z: m( w v- P1 F5 Asockaddr_in remotesock_addr; * W* l8 E" V. ?$ zchar data[MAXDATALEN],url[250],temp[250],httpurl[250],portnum[10]; int datalen,i,index_start,index_end,port; CString HttpString,UrlString,PortString; / Y- l1 ~( S Zpclientinfo=(LPCLIENTINFO)info; clientsock=pclientinfo->clientsock; ZeroMemory((void *)data,sizeof(data)); datalen=recv(clientsock,data,sizeof(data),0); if(datalen<=0){ closesocket(clientsock); return 0;

韩冰

} 1 o) `2 U1 c" y* U3 \" B8 tHttpString.Format("%s",data); ; m& \; l" _! s% `# h* Q' oUrlString=HttpString; TRACE("get http string:\r\n"); TRACE(HttpString); index_start=HttpString.Find("Host: ",0); //寻找url标记 . b: e$ I9 r7 ?( C! @; Zif(index_start<=0){ 3 ^2 l/ r e4 P) K1 ~. B/ rclosesocket(clientsock); 9 W/ C/ j+ ^* O7 C: U5 Y2 Areturn 0; % l1 C! i. x% Y4 E} 1 P: P& Z, \0 t: y5 @/ r: Y' Kindex_end=HttpString.Find("\r\n",index_start); ; q. \, R' S; r' }* Q& Xif(index_end<=0){ closesocket(clientsock); return 0; } UrlString=HttpString.Mid(index_start+6,index_end-index_start-6); //读取 url字符串 + c2 I- m2 S. h5 }1 a1 |TRACE("\r\n get url:"); TRACE(UrlString); wsprintf(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 * W: \( J" e- M5 @index_start=HttpString.Find(temp,0); strcpy(httpurl,"http://"); if(index_start>0){ 4 |) c. b \/ W# X0 Vindex_end=HttpString.Find("/",index_start); if(index_end<=0){ " u+ \$ Y/ V7 d# v# Q( P8 O7 r/ q4 nclosesocket(clientsock); + {$ f( p7 V2 y9 s& ireturn 0; } 3 B* _4 o# U$ _$ \' ePortString=HttpString.Mid(index_start+datalen,index_end-index_start-datalen); port=atoi(PortString); strcat(httpurl,temp); itoa(port,portnum,sizeof(portnum)); 7 e* k4 Q8 w! J8 r2 m- B9 Istrcat(httpurl,portnum); strcat(httpurl,"/"); ) I/ D+ H6 E7 q3 u8 G/ m, y) t} else{ 7 h7 b; ]2 `) {0 D. n9 o1 wport=80; strcat(httpurl,url); strcat(httpurl,"/"); } TRACE("get http url:%s\r\n",httpurl); HttpString.Replace(httpurl,"/"); ! ?$ c- B2 G' m7 P2 r0 |HttpString.Replace("Proxy-",""); ) ^) ?0 d& U: y" c9 `3 O# T: {HttpString.Replace("HTTP/1.0","HTTP/1.1"); } else if(HttpString.Find("CONNECT",0)==0){ //判断connect命令并处理 S/ ~0 U, {+ C* Jindex_start=HttpString.Find(temp,0); if(index_start>0){ ) r% y8 h1 T- N4 Sindex_end=HttpString.Find(" ",index_start); ' Q% g2 B; _# }3 A; Cif(index_end<=0){ ! `% ?* n# {; kclosesocket(clientsock); 9 j: b! m8 D9 M1 g. z$ K. D; preturn 0; / S, j x2 p/ s5 E: t2 X6 J% l} PortString=HttpString.Mid(index_start+datalen,index_end-index_start-datalen); port=atoi(PortString); ' X8 C1 h$ J! [6 h} 9 u5 t [8 e* V7 W* telse{ closesocket(clientsock); 2 s& q V$ i& ^# B+ ]return 0; } } 6 e6 o+ Q; j FTRACE("get new http string:\r\n"); TRACE(HttpString); 2 u- B& c' j: ^* }" B, i2 E% Xremotesock_addr.sin_family=AF_INET; remotesock_addr.sin_port=htons(port); 3 x) K. n3 @7 h6 z' K5 oremotesock_addr.sin_addr.S_un.S_addr=GetDomainIp(url); 1 n' n/ J4 { ~' I. H0 ^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 5 c- ?$ q$ r$ n' ?1 _7 Pclosesocket(clientsock); . c% v- N4 |# U, freturn 0; % K# v* a+ z! K- v D} TRACE("\r\nconnect to remote ip ok\r\n"); ZeroMemory((void *)data,sizeof(data)); wsprintf(data,"%s",HttpString); datalen=strlen(data); if(HttpString.Find("CONNECT",0)<0) while(!send(connectsock,data,datalen,0)); else{ # O: a. d7 P" @# c$ z5 Cstrcpy(data,"HTTP/1.0 200 Connection established\r\nProxy-agent: CHTTPPROXY V1.0 powered by shadow\r\n\r\n"); datalen=strlen(data); 7 \3 b7 T n0 s5 J7 Nwhile(!send(clientsock,data,datalen,0)); } httpsockinfo.sourcesock=clientsock; $ y2 c2 Q2 w: c: x! A3 s/ @httpsockinfo.destsock=connectsock; AfxBeginThread(HttpReciveThread,(LPVOID)&httpsockinfo); //抛出处理线程 AfxBeginThread(HttpSendThread,(LPVOID)&httpsockinfo); // 1 t" U/ a1 H/ L: USleep(100); return 1; } 1 I5 g& q. ~+ q" \9 L2 Y' ?// UINT StartHttpProxy(LPVOID info){ //端口监听线程 " g- G' R) o! I! f0 ~SOCKET NewSock; % ^* t. A8 T) o7 G; ?int socklen; sockaddr_in serversock,remotesock_addr; 6 r5 S4 o! ^4 z8 [serversock.sin_family=AF_INET; serversock.sin_addr.S_un.S_addr=INADDR_ANY; serversock.sin_port=htons(HttpListenPort); ! J- u/ d x- L# w! m: [, M) }HttpListenSock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); 5 S! b$ u: M5 ~$ Y, }: ?6 ]9 ?if(HttpListenSock==INVALID_SOCKET) return 0; if(bind(HttpListenSock,(const sockaddr *)&serversock,sizeof(serversock))==SOCKET_ERROR) return 0; " a+ R' V: @3 ~2 i7 Z \7 R/ qlisten(HttpListenSock,BACKUP); socklen=sizeof(remotesock_addr); TRACE("start http proxy thread while\r\n"); while(true){ ( }( ^- n% s* X% b ^) INewSock=accept(HttpListenSock,(sockaddr *)&remotesock_addr,&socklen); ( a0 N5 Q" k4 Y' nTRACE("waitting ok...\r\n"); 6 j4 j% M: `' P e+ {if(NewSock==INVALID_SOCKET){ 0 Y8 M: j0 I5 \" Q- x# _5 GSleep(1); continue; 0 k6 h4 ~/ U- v" k/ E9 O6 y/ O6 O} 5 c+ a8 G, D0 d1 g9 D* z Q+ eZeroMemory((void *)&HttpClientInfo,sizeof(CLIENTINFO)); HttpClientInfo.clientsock=NewSock; s8 Y5 D3 \) d# EHttpClientInfo.clientsock_addr=remotesock_addr; 1 i4 W: z' @- g5 c; T1 ?TRACE("start proxy thread\r\n"); AfxBeginThread(HttpProxyServerThread,(LPVOID)&HttpClientInfo); Sleep(100); % t" e0 N- V, C} 0 r. _5 H6 v! \. z8 v0 K8 xreturn 1; 4 k* ?3 Z. |- z} // 7 q s+ X H5 `4 l1 ]' Z* SCHTTPPROXY::CHTTPPROXY() { 2 p1 Q" V9 B+ U: C# S( s, v5 mWSADATA WsaData; WORD wsaVer; wsaVer=MAKEWORD(2,0); ! C6 D" A* n- s* m a# F4 [( bWsaStartupOk=false; if(WSAStartup(wsaVer,&WsaData)!=SOCKET_ERROR) WsaStartupOk=true; ! s9 t) h, A1 t9 k}

CHTTPPROXY::~CHTTPPROXY() $ Z8 r- s+ N: S. h+ L5 {5 p{ 0 T4 h& o* X! \1 |/ Q, g4 p4 h; uif(WsaStartupOk){ ) c5 X0 h- a" _% K- T* Z/ MWSACleanup(); 1 T9 p. v- l0 K} ; s/ v& h8 d2 o* Y/ o! [}

int CHTTPPROXY::StartProxy(int listenport) { 9 B4 }( y" Q4 F1 D9 THttpListenPort=listenport; AfxBeginThread(StartHttpProxy,(LPVOID)NULL); return 1; }

/*========================================================================= ( B$ @1 j5 @9 _' D- ]% v8 eFILE:HTTPPROXY.h ==========================================================================*/ class CHTTPPROXY { public: int StartProxy(int listenport); , r' S* e- y# @ Obool WsaStartupOk; : ]9 {9 Q; Y; Q% b0 Z7 uCHTTPPROXY(); 6 F+ i3 P( e' K3 N. kvirtual ~CHTTPPROXY();

};

/*========================================================================= FILE:stdafx.h 9 ]- H" n: y9 Y7 Z- D, i6 Q1 L==========================================================================*/ 7 E; Q+ e. W' s- M: l#include #include $ o8 j3 h3 h' p#include : S: i$ J( s) k#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") 1 w/ h, ^9 c- `. F$ T#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; " a3 I: A+ R4 {httpproxy.StartProxy(7890); 7 r5 p% c v6 u/ Z: ]4 @有问题mailto me！