+const char killpopup_rcs[] = "$Id: killpopup.c,v 1.1 2001/05/13 21:57:06 administrator Exp $";
+/*********************************************************************
+ *
+ * File : $Source: /home/administrator/cvs/ijb/killpopup.c,v $
+ *
+ * Purpose : Handles the filtering of popups.
+ *
+ * Copyright : Written by and Copyright (C) 2001 the SourceForge
+ * IJBSWA team. http://ijbswa.sourceforge.net
+ *
+ * Based on the Internet Junkbuster originally written
+ * by and Copyright (C) 1997 Anonymous Coders and
+ * Junkbusters Corporation. http://www.junkbusters.com
+ *
+ * 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 (at
+ * your option) 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.
+ *
+ * The GNU General Public License should be included with
+ * this file. If not, you can view it at
+ * http://www.gnu.org/copyleft/gpl.html
+ * or write to the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Revisions :
+ * $Log: killpopup.c,v $
+ *
+ *********************************************************************/
+\f
+
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <string.h>
+#include <malloc.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <ctype.h>
+
+#ifndef _WIN32
+#include <unistd.h>
+#endif
+
+#include "project.h"
+#include "killpopup.h"
+#include "jcc.h"
+
+const char killpopup_h_rcs[] = KILLPOPUP_H_VERSION;
+
+#ifdef KILLPOPUPS
+
+/* Change these for debug output. *lots*. */
+/*#define POPUP_VERBOSE 1*/
+/* CHANGED - added the below and shifted the more spammy stuff into it ;-) */
+#undef POPUP_VERY_VERBOSE
+#undef POPUP_VERBOSE
+
+
+/*********************************************************************
+ *
+ * Function : filter_popups
+ *
+ * Description : Filter the block of data that's been read from the server.
+ * IF NECESSARY.
+ *
+ * Parameters :
+ * 1 : csp = Client state
+ * 2 : host_name = hostname of originating web page to
+ * look up on blocklist
+ * 3 : buff = Buffer to scan and modify. Null terminated.
+ * 4 : size = Buffer size, excluding null terminator.
+ *
+ * Returns : void
+ *
+ *********************************************************************/
+void filter_popups(struct client_state *csp, char *host_name, char *buff, int size)
+{
+ struct popup_settings * data;
+ struct popup_blocklist * cur;
+ int i;
+ int found = 0;
+ char *popup = NULL;
+ char *close = NULL;
+ char *p = NULL;
+ char *q = NULL; /* by BREITENB NEW! */
+
+ if ( (!csp->plist) || ((data = csp->plist->f) == NULL) )
+ {
+ /* Disabled. */
+ return;
+ }
+
+ /* If the hostname is on our list for blocking then mark it
+ * as a host to block from. (This may be later changed if the
+ * host is also on the list-to-allow list).
+ */
+
+ for (i=0; (i < 50) && (i < size); i++) /* avoid scanning binary data! */
+ {
+ if ((unsigned int)(buff[i])>127)
+ {
+#ifdef POPUP_VERBOSE
+ fprintf(logfp, "I'm not scanning binary stuff! (%i)\n",buff[i]);
+#endif
+ return;
+ }
+ }
+
+
+ for (cur = data->blocked ; cur ; cur = cur->next)
+ {
+ if ( host_name != 0 )
+ {
+ if ( strcmp( cur->host_name, host_name ) == 0 )
+ {
+#ifdef POPUP_VERBOSE
+ fprintf(logfp, "Blocking %s\n", host_name );
+#endif
+ found = 1;
+ }
+ }
+ }
+
+ /* Force match if we're supposed to nuke _all_ popups, globally. */
+ if ( kill_all_popups != 0 )
+ {
+#ifdef POPUP_VERBOSE
+ fprintf(logfp, "Indescriminatly nuking popups..\n" );
+#endif
+ found = 1;
+ }
+ /* an exception-from blocking should still be an exception! by BREITENB NEW! */
+
+
+ /* Now, if its allowed adjust the filtering, so it _doesn't_ happen. */
+ for (cur = data->allowed ; cur ; cur = cur->next)
+ {
+ if ( host_name != 0 )
+ {
+ if ( strcmp( cur->host_name, host_name ) == 0 )
+ {
+#ifdef POPUP_VERBOSE
+ fprintf(logfp, "Reversing block decision for %s\n", host_name );
+#endif
+ found = 0;
+ }
+ }
+ }
+
+ if ( found == 0)
+ {
+#ifdef POPUP_VERBOSE
+ fprintf(logfp, "Allowing %s\n", host_name );
+#endif
+ return;
+ }
+
+ while ((popup = strstr( buff, "window.open(" )) != NULL)
+ /* if ( popup ) by BREITENB filter ALL popups! NEW! */
+ {
+#ifdef POPUP_VERBOSE
+ fprintf(logfp, "Found start of window open" );
+#endif
+ close = strstr( popup+1, ");" );
+ if ( close )
+ {
+#ifdef POPUP_VERBOSE
+ fprintf(logfp, "Found end of window open" );
+#endif
+ for ( p = popup; p != (close+1); p++ )
+ {
+ *p = ' ';
+ }
+#ifdef POPUP_VERBOSE
+ fprintf(logfp, "Blocked %s\n", host_name );
+#endif
+ }
+ else
+ {
+#ifdef POPUP_VERBOSE
+ fprintf(logfp, "Couldn't find end, turned into comment. Read boundary?\n" );
+#endif
+ *popup = '/';
+ popup++;
+ *popup = '/';
+ }
+
+
+ q=popup; /* by BREITENB NEW! */
+ while (q>=buff)
+ {
+ if (*q==' ' || *q=='\t')
+ q--;
+ else break;
+ }
+ if (q>=buff)
+ {
+ if (*q=='=') *++q='1';
+ /* result of popup is assigned to a variable! ensure success. hehehe. */
+ }
+ }
+
+ /* Filter all other crap like onUnload onExit etc. (by BREITENB) NEW!*/
+ popup=strstr( buff, "<body");
+ if (!popup) popup=strstr( buff, "<BODY");
+ if (!popup) popup=strstr( buff, "<Body");
+ if (!popup) popup=strstr( buff, "<BOdy");
+ if (popup)
+ {
+ q=strchr(popup,'>');
+ if (q)
+ {
+ /* we are now between <body and the ending > */
+ p=strstr(popup, "onUnload");
+ if (p)
+ {
+ strncpy(p,"_nU_",4);
+ }
+ p=strstr(popup, "onExit");
+ if (p)
+ {
+ strncpy(p,"_nE_",4);
+ }
+ }
+ }
+
+}
+
+#endif /* def KILLPOPUPS */
+
+/*
+ Local Variables:
+ tab-width: 3
+ end:
+*/
projects / privoxy.git / blobdiff