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htscatchurl.c
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2004-05-09
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/* ------------------------------------------------------------ */
/*
HTTrack Website Copier, Offline Browser for Windows and Unix
Copyright (C) Xavier Roche and other contributors
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Important notes:
- We hereby ask people using this source NOT to use it in purpose of grabbing
emails addresses, or collecting any other private information on persons.
This would disgrace our work, and spoil the many hours we spent on it.
Please visit our Website: http://www.httrack.com
*/
/* ------------------------------------------------------------ */
/* File: URL catch .h */
/* Author: Xavier Roche */
/* ------------------------------------------------------------ */
/* Internal engine bytecode */
#define HTS_INTERNAL_BYTECODE
// Fichier intercepteur d'URL .c
/* specific definitions */
/* specific definitions */
#include "htsbase.h"
#include "htsnet.h"
#include "htslib.h"
#ifndef _WIN32_WCE
#include <fcntl.h>
#endif
#if HTS_WIN
#else
#include <arpa/inet.h>
#endif
/* END specific definitions */
/* dΘfinitions globales */
#include "htsglobal.h"
/* htslib */
/*#include "htslib.h"*/
/* catch url */
#include "htscatchurl.h"
// URL Link catcher
// 0- Init the URL catcher with standard port
// catch_url_init(&port,&return_host);
HTSEXT_API T_SOC catch_url_init_std(int* port_prox,char* adr_prox) {
T_SOC soc;
int try_to_listen_to[]={8080,3128,80,81,82,8081,3129,31337,0,-1};
int i=0;
do {
soc=catch_url_init(&try_to_listen_to[i],adr_prox);
*port_prox=try_to_listen_to[i];
i++;
} while( (soc == INVALID_SOCKET) && (try_to_listen_to[i]>=0));
return soc;
}
// 1- Init the URL catcher
// catch_url_init(&port,&return_host);
HTSEXT_API T_SOC catch_url_init(int* port,char* adr) {
T_SOC soc = INVALID_SOCKET;
char h_loc[256+2];
if (gethostname(h_loc,256)==0) { // host name
SOCaddr server;
int server_size=sizeof(server);
t_hostent* hp_loc;
t_fullhostent buffer;
// effacer structure
memset(&server, 0, sizeof(server));
if ( (hp_loc=vxgethostbyname(h_loc, &buffer)) ) { // notre host
// copie adresse
SOCaddr_copyaddr(server, server_size, hp_loc->h_addr_list[0], hp_loc->h_length);
if ( (soc=socket(SOCaddr_sinfamily(server), SOCK_STREAM, 0)) != INVALID_SOCKET) {
SOCaddr_initport(server, *port);
if ( bind(soc,(struct sockaddr*) &server,server_size) == 0 ) {
SOCaddr server2;
int len;
len=sizeof(server2);
// effacer structure
memset(&server2, 0, sizeof(server2));
if (getsockname(soc,(struct sockaddr*) &server2,&len) == 0) {
*port=ntohs(SOCaddr_sinport(server)); // rΘcupΘrer port
if (listen(soc,10)>=0) { // au pif le 10
SOCaddr_inetntoa(adr, 128, server2, len);
} else {
#ifdef _WIN32
closesocket(soc);
#else
close(soc);
#endif
soc=INVALID_SOCKET;
}
} else {
#ifdef _WIN32
closesocket(soc);
#else
close(soc);
#endif
soc=INVALID_SOCKET;
}
} else {
#ifdef _WIN32
closesocket(soc);
#else
close(soc);
#endif
soc=INVALID_SOCKET;
}
}
}
}
return soc;
}
// 2 - Wait for URL
// catch_url
// returns 0 if error
// url: buffer where URL must be stored - or ip:port in case of failure
// data: 32Kb
HTSEXT_API int catch_url(T_SOC soc,char* url,char* method,char* data) {
int retour=0;
// connexion (accept)
if (soc != INVALID_SOCKET) {
T_SOC soc2;
struct sockaddr dummyaddr;
int dummylen = sizeof(struct sockaddr);
while ( (soc2=accept(soc,&dummyaddr,&dummylen)) == INVALID_SOCKET);
/*
#ifdef _WIN32
closesocket(soc);
#else
close(soc);
#endif
*/
soc = soc2;
/* INFOS */
{
SOCaddr server2;
int len;
len=sizeof(server2);
// effacer structure
memset(&server2, 0, sizeof(server2));
if (getpeername(soc,(struct sockaddr*) &server2,&len) == 0) {
char dot[256+2];
SOCaddr_inetntoa(dot, 256, server2, sizeof(server2));
sprintf(url,"%s:%d", dot, htons(SOCaddr_sinport(server2)));
}
}
/* INFOS */
// rΘception
if (soc != INVALID_SOCKET) {
char line[1000];
char protocol[256];
line[0]=protocol[0]='\0';
//
socinput(soc,line,1000);
if (strnotempty(line)) {
if (sscanf(line,"%s %s %s",method,url,protocol) == 3) {
char BIGSTK url_adr[HTS_URLMAXSIZE*2];
char BIGSTK url_fil[HTS_URLMAXSIZE*2];
// mΘthode en majuscule
int i,r=0;
url_adr[0]=url_fil[0]='\0';
//
for(i=0;i<(int) strlen(method);i++) {
if ((method[i]>='a') && (method[i]<='z'))
method[i]-=('a'-'A');
}
// adresse du lien
if (ident_url_absolute(url,url_adr,url_fil)>=0) {
// Traitement des en-tΩtes
char BIGSTK loc[HTS_URLMAXSIZE*2];
htsblk blkretour;
memset(&blkretour, 0, sizeof(htsblk)); // effacer
blkretour.location=loc; // si non nul, contiendra l'adresse vΘritable en cas de moved xx
// Lire en tΩtes restants
sprintf(data,"%s %s %s\r\n",method,url_fil,protocol);
while(strnotempty(line)) {
socinput(soc,line,1000);
treathead(NULL,NULL,NULL,&blkretour,line); // traiter
strcatbuff(data,line);
strcatbuff(data,"\r\n");
}
// CR/LF final de l'en tΩte inutile car dΘja placΘ via la ligne vide juste au dessus
//strcatbuff(data,"\r\n");
if (blkretour.totalsize>0) {
int len=(int)min(blkretour.totalsize,32000);
int pos=strlen(data);
// Copier le reste (post Θventuel)
while((len>0) && ((r=recv(soc,(char*) data+pos,len,0))>0) ) {
pos+=r;
len-=r;
data[pos]='\0'; // terminer par NULL
}
}
// Envoyer page
sprintf(line,CATCH_RESPONSE);
send(soc,line,strlen(line),0);
// OK!
retour=1;
}
}
} // sinon erreur
}
}
if (soc != INVALID_SOCKET) {
#ifdef _WIN32
closesocket(soc);
/*
WSACleanup();
*/
#else
close(soc);
#endif
}
return retour;
}
// Lecture de ligne sur socket
void socinput(T_SOC soc,char* s,int max) {
int c;
int j=0;
do {
unsigned char b;
if (recv(soc,(char*) &b,1,0)==1) {
c=b;
switch(c) {
case 13: break; // sauter CR
case 10: c=-1; break;
case 9: case 12: break; // sauter ces caractΦres
default: s[j++]=(char) c; break;
}
} else
c=EOF;
} while((c!=-1) && (c!=EOF) && (j<(max-1)));
s[j++]='\0';
}