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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
/*========================================================================= $ [( L; [: q4 n" @FILE:HTTPPROXY.cpp HTTP Proxy v1.0 powered by shadow 2004/11/14 my web:http://www.codehome.6600.org " ?+ v6 p b' Q3 }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 ==========================================================================*/ , x/ f. l- @7 ], t2 b) [/ M G

#include "stdafx.h" 3 f% y, I+ f5 F& L- p' Q2 D" k#include "HTTPPROXY.h" $ M" D! ~" p- K& i4 u% x, u#define FD_NOEVENT 0 ! j4 B/ n1 B) t$ |( G) b// ) s# f" ^3 S+ U#define BACKUP 100 #define MAXDATALEN 65535 int HttpListenPort; / Q. Z2 h* \$ J+ M( R1 k( @SOCKET HttpListenSock; " A+ f' e+ J) r- O8 r2 X5 x// typedef struct _CLIENTINFO{ SOCKET clientsock; ?. f' f# Y4 PSOCKET udpsock; j$ P9 [0 v' T- G, \. T Ssockaddr_in clientsock_addr; }CLIENTINFO,*LPCLIENTINFO; * h6 J, i: \! ^# l$ b8 iCLIENTINFO HttpClientInfo; // typedef struct _SOCKINFO{ SOCKET sourcesock; SOCKET destsock; }SOCKINFO,*LPSOCKINFO; SOCKINFO httpsockinfo; - x3 I7 t5 _6 V3 U! A. ?// ! E. m* D5 R( |) i& pextern long GetSocketEventId(SOCKET remotesock); 6 H& ^$ m& T- g1 u' A4 O! i$ iextern unsigned long GetLocalIp(); . F- h" M' d- k2 G3 Y9 b% y0 X0 ~extern unsigned long GetDomainIp(char domainname[250]); /* long GetSocketEventId(SOCKET remotesock){ 1 Y" z' k- v. R* x% klong EventId; HANDLE hevent; ( s+ X1 r3 N+ Y' {* ]hevent=CreateEvent(NULL,0,0,0); 8 i; C# R9 a" E: g2 `( iWSANETWORKEVENTS socket_events; EventId=FD_NOEVENT; if(WSAEventSelect(remotesock,hevent,FD_ACCEPT|FD_CONNECT|FD_READ|FD_WRITE|FD_CLOSE)==SOCKET_ERROR) return EventId; , ~! U( d3 W* V: y, bWSAEnumNetworkEvents(remotesock,hevent,&socket_events); 4 H u" j# n3 T: P3 g+ W& F$ Gif(socket_events.lNetworkEvents!=0){ 3 c$ {# f- c0 X ^switch(socket_events.lNetworkEvents){ case FD_ACCEPT:EventId=FD_ACCEPT;break; . m0 y; H* E6 w$ scase FD_CONNECT:EventId=FD_CONNECT;break; case FD_READ:EventId=FD_READ;break; case FD_WRITE:EventId=FD_WRITE;break; n% K7 s# G% V6 d0 ~' \case FD_CLOSE:EventId=FD_CLOSE;break; case FD_OOB:EventId=FD_OOB;break; default:EventId=FD_NOEVENT;break; } } / i1 k% l9 i pelse EventId=FD_NOEVENT; 4 r' A U6 x L0 i4 I& ^return EventId; } $ _( ~8 C/ ?( @- s6 j; X$ s// * S9 n* D7 W9 ?) Y/ A6 S4 aunsigned long GetLocalIp() { char IP[MAX_PATH],*ip; char pc_name[80]; ' @& F g1 b: g5 ^+ K E2 P! wstruct in_addr in; struct hostent *host; 8 r @: ^' \. x( l, @9 hWORD wVersionRequested; WSADATA wsaData; # x! K+ m7 M$ K( P) N% J! o" }wVersionRequested=MAKEWORD(2,0); - v E7 \2 y( vip=IP; & P4 U# V# L* G- L4 P' fstrcpy(ip,"Ip not get!"); 0 w. F/ T& a* A6 T5 C0 Wif(WSAStartup(wVersionRequested,&wsaData)) return 0; " `* C7 @" x( Z! Wif(gethostname(pc_name,80)==SOCKET_ERROR){ & j; w Z# o% l Y' r/ rWSACleanup(); return 0; ! T; f# V. Y! j/ r# M} 6 M% t) @5 U! r. l' Sif(!(host=gethostbyname(pc_name))){ WSACleanup(); return 0; 0 z3 S' _! P" ~: k} in.s_addr=*((unsigned long *)host->h_addr_list[0]); : N9 F5 F9 @% e3 b& Sstrcpy(ip,inet_ntoa(in)); WSACleanup(); - [" E' n Y, F) }2 R0 c1 ereturn in.s_addr; } // & V6 J3 ^! b6 U" x/ Z& z/ qunsigned long GetDomainIp(char domainname[250]) { char IP[MAX_PATH],*ip; struct in_addr in; ! W& a/ h d# P. l! f; q8 @( Dstruct hostent *host; WORD wVersionRequested; 0 _; W- w- W s6 s" ?2 ]& g6 IWSADATA wsaData; O8 l6 n) B6 s7 Q4 MwVersionRequested=MAKEWORD(2,0); ip=IP; , T. a6 V& U! I% U/ }8 S) c i7 Sstrcpy(ip,"Ip not get!"); ' o3 @9 }9 c$ J k4 |9 ?: o, ~if(WSAStartup(wVersionRequested,&wsaData)) return 0; % F) a1 J0 G6 n! w/ H! Pif(!(host=gethostbyname(domainname))){ ! c `9 A2 p; g2 a: E3 ^WSACleanup(); $ o+ {2 J* J/ y' ]( Treturn 0; , W( Z! \! I+ ]0 y6 S3 j! O} in.s_addr=*((unsigned long *)host->h_addr_list[0]); strcpy(ip,inet_ntoa(in)); 2 u7 I% F9 {6 h" }WSACleanup(); 6 t, Q7 q9 U8 V/ l+ p# areturn in.s_addr; } 3 d+ w+ ?2 ?- B( |; C' r# P*/ / Z1 H" t5 O5 Y' x* T% L0 U: b// 4 o w9 J4 b# u- ~* l: U6 A// UINT HttpReciveThread(LPVOID info){ //针对客户端的接收处理线程 * D: ?4 G; f! y( B4 J, {6 T" [LPSOCKINFO psockinfo; 4 l) a) v% Z, `: G- w# sSOCKET sourcesock,destsock; 2 J6 t& N3 D" ~$ U' N! x5 jchar data[MAXDATALEN]; long eventid; int datalen; psockinfo=(LPSOCKINFO)info; sourcesock=psockinfo->sourcesock; & W5 C; Y- \5 X" \/ Q+ o. o( ~; ydestsock=psockinfo->destsock; TRACE("deail recive thread ok!\r\n"); while(true){ eventid=GetSocketEventId(sourcesock); 8 \ @: v: r8 B5 P* y* `0 z4 u$ |# o. oswitch(eventid){ case FD_CLOSE: / u2 K. k" Q g1 BTRACE("s fdclosed\r\n"); closesocket(destsock); return 1; break; % g, r# n! o9 Hdefault:break; 5 k: b0 i% k$ W6 z/ |; c} / T. c* ?6 C7 i) ieventid=GetSocketEventId(destsock); switch(eventid){ case FD_CLOSE: . z" D4 {% t6 @- X4 t; G; p& s4 Gclosesocket(sourcesock); 7 @9 d$ o' q( x0 L: YTRACE("d fdclosed\r\n"); - r; _ g! c6 C8 Z) ureturn 1; . o2 W. F/ s/ R& t V. Nbreak; default:break; } datalen=recv(sourcesock,data,sizeof(data),0); 1 r/ F4 P! O$ wif(datalen==0){ closesocket(sourcesock); + \- Q: _: G" Y6 D% N1 F8 V" nclosesocket(destsock); TRACE("s fdclosed\r\n"); % w5 ~* E' C1 Rbreak; } if(datalen>0){ + Z8 f( z! j% ?5 dwhile(!send(destsock,data,datalen,0)); " I7 U! x8 V2 K! z3 q) |$ A} - z$ n6 j& p o0 z" X0 {Sleep(1); 2 ~+ b. E; r) ~5 U* \9 a} + x. r, s1 V, }$ h, {. Ireturn 1; } , Z( O3 t0 C1 ~' Z% \- j// 3 o. x% g. g1 o) V$ F" SUINT HttpSendThread(LPVOID info){ //针对远程端的接收处理线程 7 s' u4 v4 P8 O& sLPSOCKINFO psockinfo; SOCKET sourcesock,destsock; char data[MAXDATALEN]; long eventid; int datalen; psockinfo=(LPSOCKINFO)info; sourcesock=psockinfo->sourcesock; destsock=psockinfo->destsock; . M9 F; [- @0 m0 d$ ATRACE("deail send thread ok!\r\n"); 7 m8 {. X3 }6 M: U L lwhile(true){ / b/ s S% B H7 w' O* [eventid=GetSocketEventId(sourcesock); switch(eventid){ 3 z* k& d k8 x1 }8 i }: `: }case FD_CLOSE: TRACE("s fdclosed\r\n"); 1 t& O7 {5 t" t- R" `4 C( o9 W( Oclosesocket(destsock); return 1; break; - g' o$ d, D& F. u! O a+ fdefault:break; } eventid=GetSocketEventId(destsock); switch(eventid){ 7 z6 @5 J- i! dcase FD_CLOSE: : K- X0 O& o% C% w2 u& zclosesocket(sourcesock); TRACE("d fdclosed\r\n"); return 1; . A6 ]% \6 Z m1 m+ N& f7 Cbreak; : e9 y, U5 m* _. v& c2 W0 Ydefault:break; } datalen=recv(destsock,data,sizeof(data),0); 5 D! d, m4 J, X7 ]1 W! X7 w2 e% Sif(datalen==0){ ( I- O; Y5 V& x2 j8 o" n) ^1 Iclosesocket(sourcesock); 1 q P$ l0 [) t& i5 \4 m) |closesocket(destsock); + n/ G0 r" m+ m/ jTRACE("d fdclosed\r\n"); ' b3 r7 y+ t1 J9 {! ubreak; $ X4 e. a# U4 ?* M& X+ B# K( p- d} if(datalen>0){ while(!send(sourcesock,data,datalen,0)); } u2 ^* X% f/ k+ Z+ n* y2 e& vSleep(1); 9 B3 E0 T* G5 Z: ^6 D} ) h; I- y. v5 k: ?( vreturn 1; 2 k/ X4 O0 ^9 C+ K: H( E} // # }1 B# h; `" g+ v; R// UINT HttpProxyServerThread(LPVOID info){ //针对一次服务的线程 * r! b/ H/ Q2 l6 L* OLPCLIENTINFO pclientinfo; SOCKET connectsock,clientsock; sockaddr_in remotesock_addr; char data[MAXDATALEN],url[250],temp[250],httpurl[250],portnum[10]; . G3 B# Z" P% {* x3 Bint datalen,i,index_start,index_end,port; CString HttpString,UrlString,PortString; pclientinfo=(LPCLIENTINFO)info; % F4 e, W5 K$ i h5 J8 [; U+ Cclientsock=pclientinfo->clientsock; ) E; w7 L& i$ K" l& J/ tZeroMemory((void *)data,sizeof(data)); datalen=recv(clientsock,data,sizeof(data),0); & ~! m& I5 y* j. U4 Lif(datalen<=0){ 6 s9 d+ |2 @0 vclosesocket(clientsock); return 0;

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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"); O" l7 {9 ~2 [+ I- J* \1 OTRACE(HttpString); : T) N3 Y, u2 Y$ b, Yindex_start=HttpString.Find("Host: ",0); //寻找url标记 if(index_start<=0){ closesocket(clientsock); return 0; } , \# d2 ^+ p" `; x' O, G6 N5 qindex_end=HttpString.Find("\r\n",index_start); if(index_end<=0){ closesocket(clientsock); return 0; # c& k+ V+ H3 Y, E. `$ X} 8 P( K" V' p6 N) tUrlString=HttpString.Mid(index_start+6,index_end-index_start-6); //读取 url字符串 TRACE("\r\n get url:"); 9 W% x, I- u Y( \& S* @0 `& yTRACE(UrlString); wsprintf(url,"%s",UrlString); strcpy(temp,url); 3 p3 h, I/ k; V: H% c# wstrcat(temp,":"); datalen=strlen(temp); ! I' ]& K3 |" p. r0 a3 Dif(HttpString.Find("GET",0)==0){ //判断get命令，并处理 ) p0 e) _0 O1 ]( W+ {9 findex_start=HttpString.Find(temp,0); strcpy(httpurl,"http://"); if(index_start>0){ index_end=HttpString.Find("/",index_start); 0 A' d8 j4 f( _! H- ~: c- ]& Qif(index_end<=0){ closesocket(clientsock); return 0; 4 X; e) C; V. a% z2 ?7 o} 8 V3 h/ W# Q, j! U2 b+ Y. nPortString=HttpString.Mid(index_start+datalen,index_end-index_start-datalen); : B2 ]# }7 @/ w p1 o7 Q8 `port=atoi(PortString); ; n5 g1 w& R4 X6 mstrcat(httpurl,temp); ) ]" P2 s! _. I2 s8 J' Witoa(port,portnum,sizeof(portnum)); strcat(httpurl,portnum); strcat(httpurl,"/"); } else{ port=80; strcat(httpurl,url); 0 A2 z4 v: X( n, X6 q8 Mstrcat(httpurl,"/"); 7 `1 `* n+ {5 O- H" }} / d* l8 b" N* u0 m8 U% `TRACE("get http url:%s\r\n",httpurl); HttpString.Replace(httpurl,"/"); 7 ~4 M7 I- P+ I! n5 I4 W- r/ ~HttpString.Replace("Proxy-",""); HttpString.Replace("HTTP/1.0","HTTP/1.1"); } ' [1 x, {; o+ m$ ?) B* f4 t8 ]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){ 2 v$ i0 N) L8 Lindex_end=HttpString.Find(" ",index_start); 1 ]2 B b# S3 p1 G% q5 Pif(index_end<=0){ closesocket(clientsock); return 0; . b% E" R8 {- I1 A' P6 w: i} # K9 H: M4 ^( h) EPortString=HttpString.Mid(index_start+datalen,index_end-index_start-datalen); 6 P% R+ }7 h. n' Y9 d N% a2 Jport=atoi(PortString); $ v1 P5 h& h/ B# i, H C) O5 D* l0 R} else{ closesocket(clientsock); / e" d9 Z3 U; v$ x+ @$ w! Zreturn 0; 0 u2 ^9 O) f$ a: }} } TRACE("get new http string:\r\n"); 1 Y4 u. O& h: q8 n0 q7 O/ vTRACE(HttpString); remotesock_addr.sin_family=AF_INET; ) S, G4 a" I6 vremotesock_addr.sin_port=htons(port); e9 z2 ^' I ^8 C2 tremotesock_addr.sin_addr.S_un.S_addr=GetDomainIp(url); # D: k1 P% v: \) A) jconnectsock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); 8 f4 }3 f2 a3 y9 g9 gif(connect(connectsock,(const sockaddr *)&remotesock_addr,sizeof(remotesock_addr))==INVALID_SOCKET){ //连接远程主机 + o0 `0 H6 }' gclosesocket(clientsock); 5 B7 o# E# x8 `* L$ X6 t+ R* e. @0 breturn 0; } TRACE("\r\nconnect to remote ip ok\r\n"); 7 Y# g; ?6 f/ |1 X( f6 Q# KZeroMemory((void *)data,sizeof(data)); wsprintf(data,"%s",HttpString); datalen=strlen(data); if(HttpString.Find("CONNECT",0)<0) while(!send(connectsock,data,datalen,0)); 3 ~ K) Z+ I; j. e) O: xelse{ strcpy(data,"HTTP/1.0 200 Connection established\r\nProxy-agent: CHTTPPROXY V1.0 powered by shadow\r\n\r\n"); datalen=strlen(data); ; q" @3 O o; b3 X' Owhile(!send(clientsock,data,datalen,0)); } $ }2 C: i9 ] `httpsockinfo.sourcesock=clientsock; httpsockinfo.destsock=connectsock; AfxBeginThread(HttpReciveThread,(LPVOID)&httpsockinfo); //抛出处理线程 - @* N4 V2 T. }- d! ]8 s! i* t" D1 wAfxBeginThread(HttpSendThread,(LPVOID)&httpsockinfo); // Sleep(100); return 1; } // % L! h( N, p# |( h7 [UINT StartHttpProxy(LPVOID info){ //端口监听线程 3 I. i1 N- f# b% ASOCKET NewSock; int socklen; 3 B4 j% t2 _" p" z: hsockaddr_in serversock,remotesock_addr; serversock.sin_family=AF_INET; serversock.sin_addr.S_un.S_addr=INADDR_ANY; serversock.sin_port=htons(HttpListenPort); 4 M" O: u# O1 }" x: OHttpListenSock=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); ! z6 e' z- e) Zsocklen=sizeof(remotesock_addr); / H4 @' c# l5 f4 ^- |) HTRACE("start http proxy thread while\r\n"); 3 F' b1 A4 U7 Bwhile(true){ , O5 M/ {3 M, BNewSock=accept(HttpListenSock,(sockaddr *)&remotesock_addr,&socklen); ( p! t. [- I6 |! q3 O6 v$ {TRACE("waitting ok...\r\n"); if(NewSock==INVALID_SOCKET){ Sleep(1); continue; } ZeroMemory((void *)&HttpClientInfo,sizeof(CLIENTINFO)); ! Y: d2 t6 P' d; UHttpClientInfo.clientsock=NewSock; 6 b3 x; F6 y( Z; H6 w& I2 ^% j5 pHttpClientInfo.clientsock_addr=remotesock_addr; 8 w1 @- e& Z6 @4 j# e- BTRACE("start proxy thread\r\n"); % p' x% v" g5 G# P8 B, u% Y/ cAfxBeginThread(HttpProxyServerThread,(LPVOID)&HttpClientInfo); Sleep(100); } - F5 Y" z- n S+ j; }return 1; } 6 z! X9 B, B$ `// $ E4 J2 Z! Z& w, d) VCHTTPPROXY::CHTTPPROXY() " g! P) d" |6 C" C6 n- t( p u7 \{ WSADATA WsaData; 0 T# e8 g" j: o+ tWORD wsaVer; 7 [( n! ~( V! ]$ U" V6 _wsaVer=MAKEWORD(2,0); WsaStartupOk=false; if(WSAStartup(wsaVer,&WsaData)!=SOCKET_ERROR) WsaStartupOk=true; }

CHTTPPROXY::~CHTTPPROXY() 9 A7 [( Z) M' K{ ; t" l% F7 q; P: C& Yif(WsaStartupOk){ WSACleanup(); $ t7 M. j6 x6 v# ?: A} ' {' z" {5 c' i' e) @2 [8 R}

int CHTTPPROXY::StartProxy(int listenport) { 0 M9 |9 A, Z2 z# E' J4 IHttpListenPort=listenport; AfxBeginThread(StartHttpProxy,(LPVOID)NULL); return 1; " e( N. {2 |: J2 P7 [+ z. V& L}

/*========================================================================= FILE:HTTPPROXY.h 2 | U, T2 I, e+ R==========================================================================*/ / W2 `5 q+ k+ gclass CHTTPPROXY { ! T! Q3 f: I6 C; p, Apublic: int StartProxy(int listenport); 1 `1 D g) h v# L2 \1 F) G' J% dbool WsaStartupOk; , d5 S, Y5 K0 M# i3 r P% DCHTTPPROXY(); ) l5 l* {4 }0 kvirtual ~CHTTPPROXY();

};

/*========================================================================= FILE:stdafx.h 5 g9 E1 ^7 p$ N==========================================================================*/ & S) E! Q7 D5 D' R3 |% E5 ~#include #include + d+ a3 I; s) |6 E" j2 u#include #include

6 ^- c- h* l; L% j; m7 K1 d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") #paragma comment(lib,"ws2_32.lib")

本代码在win2k和vc6.0下编译成功~~ 2 Z% A) h0 u/ A& i/ \ ?0 D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); 0 N+ B; a/ f+ V H9 R( K) \$ U有问题mailto me！ 4 S& I& L9 T U1 s3 P2 b

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