+++ /dev/null
-const char filters_rcs[] = "$Id: filters.c,v 2.6 2003/09/25 02:37:32 david__schmidt Exp $";
-/*********************************************************************
- *
- * File : $Source: /cvsroot/ijbswa/current/src/filters.c,v $
- *
- * Purpose : Declares functions to parse/crunch headers and pages.
- * Functions declared include:
- * `acl_addr', `add_stats', `block_acl', `block_imageurl',
- * `block_url', `url_actions', `domain_split',
- * `filter_popups', `forward_url', 'redirect_url',
- * `ij_untrusted_url', `intercept_url', `pcrs_filter_respose',
- * `ijb_send_banner', `trust_url', `gif_deanimate_response',
- * `jpeg_inspect_response'
- *
- * Copyright : Written by and Copyright (C) 2001, 2004 the SourceForge
- * Privoxy team. http://www.privoxy.org/
- *
- * 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: filters.c,v $
- * Revision 2.6 2003/09/25 02:37:32 david__schmidt
- * Feature request 595948: Re-Filter logging in single line
- *
- * Revision 2.5 2003/09/22 00:33:01 david__schmidt
- * Enable sending a custom 'blocked' image. Shows up as
- * "image-blocker-custom-file" parameter in config, and
- * "+set-image-blocker{custom}" in action files.
- *
- * Revision 2.4 2003/01/21 02:49:27 david__schmidt
- * Developer TODO 612294: src: C++ keyword as variable name
- * I changed all ocurrences of 'new' to 'new_something' wherever I found
- * one. I also brought up all the source files in MSDEV to see if I could
- * spot any highlighted keywords that really were variables. Non-scientific,
- * but at least I tried. :-)
- *
- * Revision 2.3 2002/12/28 03:58:19 david__schmidt
- * Initial drop of dashboard instrumentation - enabled with
- * --enable-activity-console
- *
- * Revision 2.2 2002/09/04 15:38:24 oes
- * Synced with the stable branch:
- * Revision 1.58.2.2 2002/08/01 17:18:28 oes
- * Fixed BR 537651 / SR 579724 (MSIE image detect improper for IE/Mac)
- *
- * Revision 1.58.2.1 2002/07/26 15:18:53 oes
- * - Bugfix: Executing a filters without jobs no longer results in
- * turing off *all* filters.
- * - Security fix: Malicious web servers can't cause a seg fault
- * through bogus chunk sizes anymore
- *
- * Revision 2.1 2002/08/26 11:08:18 sarantis
- * Fix typo.
- *
- * Revision 2.0 2002/06/04 14:34:21 jongfoster
- * Moving source files to src/
- *
- * Revision 1.58 2002/04/24 02:11:17 oes
- * Jon's multiple AF patch: url_actions now evaluates rules
- * from all AFs.
- *
- * Revision 1.57 2002/04/08 20:38:34 swa
- * fixed JB spelling
- *
- * Revision 1.56 2002/04/05 15:51:24 oes
- * - bugfix: error-pages now get correct request protocol
- * - fix for invalid HTML in trust info
- *
- * Revision 1.55 2002/04/02 16:13:51 oes
- * Fix: No "Go there anyway" for SSL
- *
- * Revision 1.54 2002/04/02 14:55:56 oes
- * Bugfix: is_untrusted_url() now depends on FEATURE_TRUST, not FEATURE_COOKIE_JAR
- *
- * Revision 1.53 2002/03/26 22:29:54 swa
- * we have a new homepage!
- *
- * Revision 1.52 2002/03/24 16:35:57 jongfoster
- * Removing logo
- *
- * Revision 1.51 2002/03/24 15:23:33 jongfoster
- * Name changes
- *
- * Revision 1.50 2002/03/24 13:25:43 swa
- * name change related issues
- *
- * Revision 1.49 2002/03/16 20:29:14 oes
- * Cosmetics
- *
- * Revision 1.48 2002/03/13 20:25:34 oes
- * Better logging for content filters
- *
- * Revision 1.47 2002/03/13 00:30:52 jongfoster
- * Killing warnings
- * Added option of always sending redirect for imageblock,
- * currently disabled with #if 0.
- *
- * Revision 1.46 2002/03/12 01:42:49 oes
- * Introduced modular filters
- *
- * Revision 1.45 2002/03/08 16:47:50 oes
- * Added choice beween GIF and PNG built-in images
- *
- * Revision 1.44 2002/03/07 03:49:31 oes
- * - Fixed compiler warnings etc
- * - Changed built-in images from GIF to PNG
- * (with regard to Unisys patent issue)
- * - Added a 4x4 pattern PNG which is less intrusive
- * than the logo but also clearly marks the deleted banners
- *
- * Revision 1.43 2002/01/22 23:51:59 jongfoster
- * Replacing strsav() with the safer string_append().
- *
- * Adding missing html_encode() to error message generators. Where encoded
- * and unencoded versions of a string were provided, removing the unencoded
- * one.
- *
- * Revision 1.42 2002/01/17 21:00:32 jongfoster
- * Moving all our URL and URL pattern parsing code to urlmatch.c.
- *
- * Using a single, simple url_match(pattern,url) function - rather than
- * the 3-line match routine which was repeated all over the place.
- *
- * Renaming free_url to free_url_spec, since it frees a struct url_spec.
- *
- * Using parse_http_url() to parse URLs without faking a HTTP
- * request line for parse_http_request().
- *
- * Revision 1.41 2001/11/13 00:14:07 jongfoster
- * Fixing stupid bug now I've figured out what || means.
- * (It always returns 0 or 1, not one of it's paramaters.)
- *
- * Revision 1.40 2001/10/26 17:37:55 oes
- * - Re-enabled Netscape 200/404 bug workaround in block_url():
- * - Removed OS/2 special case
- * - Made block_url() independant from sed() having been run
- * - Made trust_url independant from sed() having been run
- * - Made is_imageurl independant from sed() having been run.
- * It now checks User-Agent: and Accept: by itself.
- *
- *
- * Revision 1.39 2001/10/25 03:40:48 david__schmidt
- * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
- * threads to call select() simultaneously. So, it's time to do a real, live,
- * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
- * (native). Both versions will work, but using __OS2__ offers multi-threading.
- *
- * Revision 1.38 2001/10/23 21:32:33 jongfoster
- * Adding error-checking to selected functions
- *
- * Revision 1.37 2001/10/22 15:33:56 david__schmidt
- * Special-cased OS/2 out of the Netscape-abort-on-404-in-js problem in
- * filters.c. Added a FIXME in front of the offending code. I'll gladly
- * put in a better/more robust fix for all parties if one is presented...
- * It seems that just returning 200 instead of 404 would pretty much fix
- * it for everyone, but I don't know all the history of the problem.
- *
- * Revision 1.36 2001/10/10 16:44:16 oes
- * Added match_portlist function
- *
- * Revision 1.35 2001/10/07 15:41:23 oes
- * Replaced 6 boolean members of csp with one bitmap (csp->flags)
- *
- * New function remove_chunked_transfer_coding that strips chunked
- * transfer coding to plain and is called by pcrs_filter_response
- * and gif_deanimate_response if neccessary
- *
- * Improved handling of zero-change re_filter runs
- *
- * pcrs_filter_response and gif_deanimate_response now remove
- * chunked transfer codeing before processing the body.
- *
- * Revision 1.34 2001/09/20 15:49:36 steudten
- *
- * Fix BUG: Change int size to size_t size in pcrs_filter_response().
- * See cgi.c fill_template().
- *
- * Revision 1.33 2001/09/16 17:05:14 jongfoster
- * Removing unused #include showarg.h
- *
- * Revision 1.32 2001/09/16 13:21:27 jongfoster
- * Changes to use new list functions.
- *
- * Revision 1.31 2001/09/16 11:38:02 jongfoster
- * Splitting fill_template() into 2 functions:
- * template_load() loads the file
- * template_fill() performs the PCRS regexps.
- * This is because the CGI edit interface has a "table row"
- * template which is used many times in the page - this
- * change means it's only loaded from disk once.
- *
- * Revision 1.30 2001/09/16 11:00:10 jongfoster
- * New function alloc_http_response, for symmetry with free_http_response
- *
- * Revision 1.29 2001/09/13 23:32:40 jongfoster
- * Moving image data to cgi.c rather than cgi.h
- * Fixing a GPF under Win32 (and any other OS that protects global
- * constants from being written to).
- *
- * Revision 1.28 2001/09/10 10:18:51 oes
- * Silenced compiler warnings
- *
- * Revision 1.27 2001/08/05 16:06:20 jongfoster
- * Modifiying "struct map" so that there are now separate header and
- * "map_entry" structures. This means that functions which modify a
- * map no longer need to return a pointer to the modified map.
- * Also, it no longer reverses the order of the entries (which may be
- * important with some advanced template substitutions).
- *
- * Revision 1.26 2001/07/30 22:08:36 jongfoster
- * Tidying up #defines:
- * - All feature #defines are now of the form FEATURE_xxx
- * - Permanently turned off WIN_GUI_EDIT
- * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
- *
- * Revision 1.25 2001/07/26 10:09:46 oes
- * Made browser detection a little less naive
- *
- * Revision 1.24 2001/07/25 17:22:51 oes
- * Added workaround for Netscape bug that prevents display of page when loading a component fails.
- *
- * Revision 1.23 2001/07/23 13:40:12 oes
- * Fixed bug that caused document body to be dropped when pcrs joblist was empty.
- *
- * Revision 1.22 2001/07/18 12:29:34 oes
- * - Made gif_deanimate_response respect
- * csp->action->string[ACTION_STRING_DEANIMATE]
- * - Logging cosmetics
- *
- * Revision 1.21 2001/07/13 13:59:53 oes
- * - Introduced gif_deanimate_response which shares the
- * generic content modification interface of pcrs_filter_response
- * and acts as a wrapper to deanimate.c:gif_deanimate()
- * - Renamed re_process_buffer to pcrs_filter_response
- * - pcrs_filter_response now returns NULL on failure
- * - Removed all #ifdef PCRS
- *
- * Revision 1.20 2001/07/01 17:01:04 oes
- * Added comments and missing return statement in is_untrusted_url()
- *
- * Revision 1.19 2001/06/29 21:45:41 oes
- * Indentation, CRLF->LF, Tab-> Space
- *
- * Revision 1.18 2001/06/29 13:27:38 oes
- * - Cleaned up, renamed and reorderd functions
- * and improved comments
- *
- * - block_url:
- * - Ported to CGI platform. Now delivers
- * http_response or NULL
- * - Unified HTML and GIF generation (moved image detection
- * and GIF generation here from jcc.c:chat())
- * - Fixed HTTP status to:
- * - 403 (Forbidden) for the "blocked" HTML message
- * - 200 (OK) for GIF answers
- * - 302 (Redirect) for redirect to GIF
- *
- * - trust_url:
- * - Ported to CGI platform. Now delivers
- * http_response or NULL
- * - Separated detection of untrusted URL into
- * (bool)is_untrusted_url
- * - Added enforcement of untrusted requests
- *
- * - Moved redirect_url() from cgi.c to here
- * and ported it to the CGI platform
- *
- * - Removed logentry from cancelled commit
- *
- * Revision 1.17 2001/06/09 10:55:28 jongfoster
- * Changing BUFSIZ ==> BUFFER_SIZE
- *
- * Revision 1.16 2001/06/07 23:10:26 jongfoster
- * Allowing unanchored domain patterns to back off and retry
- * if they partially match. Optimized right-anchored patterns.
- * Moving ACL and forward files into config file.
- * Replacing struct gateway with struct forward_spec
- *
- * Revision 1.15 2001/06/03 19:12:00 oes
- * extracted-CGI relevant stuff
- *
- * Revision 1.14 2001/06/01 10:30:55 oes
- * Added optional left-anchoring to domaincmp
- *
- * Revision 1.13 2001/05/31 21:21:30 jongfoster
- * Permissionsfile / actions file changes:
- * - Changed "permission" to "action" throughout
- * - changes to file format to allow string parameters
- * - Moved helper functions to actions.c
- *
- * Revision 1.12 2001/05/31 17:35:20 oes
- *
- * - Enhanced domain part globbing with infix and prefix asterisk
- * matching and optional unanchored operation
- *
- * Revision 1.11 2001/05/29 11:53:23 oes
- * "See why" link added to "blocked" page
- *
- * Revision 1.10 2001/05/29 09:50:24 jongfoster
- * Unified blocklist/imagelist/permissionslist.
- * File format is still under discussion, but the internal changes
- * are (mostly) done.
- *
- * Also modified interceptor behaviour:
- * - We now intercept all URLs beginning with one of the following
- * prefixes (and *only* these prefixes):
- * * http://i.j.b/
- * * http://ijbswa.sf.net/config/
- * * http://ijbswa.sourceforge.net/config/
- * - New interceptors "home page" - go to http://i.j.b/ to see it.
- * - Internal changes so that intercepted and fast redirect pages
- * are not replaced with an image.
- * - Interceptors now have the option to send a binary page direct
- * to the client. (i.e. ijb-send-banner uses this)
- * - Implemented show-url-info interceptor. (Which is why I needed
- * the above interceptors changes - a typical URL is
- * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
- * The previous mechanism would not have intercepted that, and
- * if it had been intercepted then it then it would have replaced
- * it with an image.)
- *
- * Revision 1.9 2001/05/27 22:17:04 oes
- *
- * - re_process_buffer no longer writes the modified buffer
- * to the client, which was very ugly. It now returns the
- * buffer, which it is then written by chat.
- *
- * - content_length now adjusts the Content-Length: header
- * for modified documents rather than crunch()ing it.
- * (Length info in csp->content_length, which is 0 for
- * unmodified documents)
- *
- * - For this to work, sed() is called twice when filtering.
- *
- * Revision 1.8 2001/05/26 17:13:28 jongfoster
- * Filled in a function comment.
- *
- * Revision 1.7 2001/05/26 15:26:15 jongfoster
- * ACL feature now provides more security by immediately dropping
- * connections from untrusted hosts.
- *
- * Revision 1.6 2001/05/26 00:28:36 jongfoster
- * Automatic reloading of config file.
- * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
- * Most of the global variables have been moved to a new
- * struct configuration_spec, accessed through csp->config->globalname
- * Most of the globals remaining are used by the Win32 GUI.
- *
- * Revision 1.5 2001/05/25 22:34:30 jongfoster
- * Hard tabs->Spaces
- *
- * Revision 1.4 2001/05/22 18:46:04 oes
- *
- * - Enabled filtering banners by size rather than URL
- * by adding patterns that replace all standard banner
- * sizes with the "Junkbuster" gif to the re_filterfile
- *
- * - Enabled filtering WebBugs by providing a pattern
- * which kills all 1x1 images
- *
- * - Added support for PCRE_UNGREEDY behaviour to pcrs,
- * which is selected by the (nonstandard and therefore
- * capital) letter 'U' in the option string.
- * It causes the quantifiers to be ungreedy by default.
- * Appending a ? turns back to greedy (!).
- *
- * - Added a new interceptor ijb-send-banner, which
- * sends back the "Junkbuster" gif. Without imagelist or
- * MSIE detection support, or if tinygif = 1, or the
- * URL isn't recognized as an imageurl, a lame HTML
- * explanation is sent instead.
- *
- * - Added new feature, which permits blocking remote
- * script redirects and firing back a local redirect
- * to the browser.
- * The feature is conditionally compiled, i.e. it
- * can be disabled with --disable-fast-redirects,
- * plus it must be activated by a "fast-redirects"
- * line in the config file, has its own log level
- * and of course wants to be displayed by show-proxy-args
- * Note: Boy, all the #ifdefs in 1001 locations and
- * all the fumbling with configure.in and acconfig.h
- * were *way* more work than the feature itself :-(
- *
- * - Because a generic redirect template was needed for
- * this, tinygif = 3 now uses the same.
- *
- * - Moved GIFs, and other static HTTP response templates
- * to project.h
- *
- * - Some minor fixes
- *
- * - Removed some >400 CRs again (Jon, you really worked
- * a lot! ;-)
- *
- * Revision 1.3 2001/05/20 16:44:47 jongfoster
- * Removing last hardcoded Junkbusters.com URLs.
- *
- * Revision 1.2 2001/05/20 01:21:20 jongfoster
- * Version 2.9.4 checkin.
- * - Merged popupfile and cookiefile, and added control over PCRS
- * filtering, in new "permissionsfile".
- * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
- * file error you now get a message box (in the Win32 GUI) rather
- * than the program exiting with no explanation.
- * - Made killpopup use the PCRS MIME-type checking and HTTP-header
- * skipping.
- * - Removed tabs from "config"
- * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
- * - Bumped up version number.
- *
- * Revision 1.1.1.1 2001/05/15 13:58:52 oes
- * Initial import of version 2.9.3 source tree
- *
- *
- *********************************************************************/
-\f
-
-#include "config.h"
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <stdlib.h>
-#include <ctype.h>
-#include <string.h>
-#include <assert.h>
-
-#ifndef _WIN32
-#ifndef __OS2__
-#include <unistd.h>
-#endif /* ndef __OS2__ */
-#include <netinet/in.h>
-#else
-#include <winsock2.h>
-#endif /* ndef _WIN32 */
-
-#ifdef __OS2__
-#include <utils.h>
-#endif /* def __OS2__ */
-
-#include "project.h"
-#include "filters.h"
-#include "encode.h"
-#include "parsers.h"
-#include "ssplit.h"
-#include "errlog.h"
-#include "jbsockets.h"
-#include "miscutil.h"
-#include "actions.h"
-#include "cgi.h"
-#include "list.h"
-#include "deanimate.h"
-#include "urlmatch.h"
-#ifdef FEATURE_ACTIVITY_CONSOLE
-#include "stats.h"
-#endif /* def FEATURE_ACTIVITY_CONSOLE */
-#ifdef _WIN32
-#include "win32.h"
-#endif
-
-const char filters_h_rcs[] = FILTERS_H_VERSION;
-
-/* Fix a problem with Solaris. There should be no effect on other
- * platforms.
- * Solaris's isspace() is a macro which uses it's argument directly
- * as an array index. Therefore we need to make sure that high-bit
- * characters generate +ve values, and ideally we also want to make
- * the argument match the declared parameter type of "int".
- */
-#define ijb_isdigit(__X) isdigit((int)(unsigned char)(__X))
-
-
-#ifdef FEATURE_ACL
-/*********************************************************************
- *
- * Function : block_acl
- *
- * Description : Block this request?
- * Decide yes or no based on ACL file.
- *
- * Parameters :
- * 1 : dst = The proxy or gateway address this is going to.
- * Or NULL to check all possible targets.
- * 2 : csp = Current client state (buffers, headers, etc...)
- * Also includes the client IP address.
- *
- * Returns : 0 = FALSE (don't block) and 1 = TRUE (do block)
- *
- *********************************************************************/
-int block_acl(struct access_control_addr *dst, struct client_state *csp)
-{
- struct access_control_list *acl = csp->config->acl;
-
- /* if not using an access control list, then permit the connection */
- if (acl == NULL)
- {
- return(0);
- }
-
- /* search the list */
- while (acl != NULL)
- {
- if ((csp->ip_addr_long & acl->src->mask) == acl->src->addr)
- {
- if (dst == NULL)
- {
- /* Just want to check if they have any access */
- if (acl->action == ACL_PERMIT)
- {
- return(0);
- }
- }
- else if ( ((dst->addr & acl->dst->mask) == acl->dst->addr)
- && ((dst->port == acl->dst->port) || (acl->dst->port == 0)))
- {
- if (acl->action == ACL_PERMIT)
- {
- return(0);
- }
- else
- {
-#ifdef FEATURE_ACTIVITY_CONSOLE
- accumulate_stats(STATS_ACL_RESTRICT, 1);
-#endif /* def FEATURE_ACTIVITY_CONSOLE */
- return(1);
- }
- }
- }
- acl = acl->next;
- }
-
- return(1);
-
-}
-
-
-/*********************************************************************
- *
- * Function : acl_addr
- *
- * Description : Called from `load_config' to parse an ACL address.
- *
- * Parameters :
- * 1 : aspec = String specifying ACL address.
- * 2 : aca = struct access_control_addr to fill in.
- *
- * Returns : 0 => Ok, everything else is an error.
- *
- *********************************************************************/
-int acl_addr(char *aspec, struct access_control_addr *aca)
-{
- int i, masklength, port;
- char *p;
-
- masklength = 32;
- port = 0;
-
- if ((p = strchr(aspec, '/')) != NULL)
- {
- *p++ = '\0';
-
- if (ijb_isdigit(*p) == 0)
- {
- return(-1);
- }
- masklength = atoi(p);
- }
-
- if ((masklength < 0) || (masklength > 32))
- {
- return(-1);
- }
-
- if ((p = strchr(aspec, ':')) != NULL)
- {
- *p++ = '\0';
-
- if (ijb_isdigit(*p) == 0)
- {
- return(-1);
- }
- port = atoi(p);
- }
-
- aca->port = port;
-
- aca->addr = ntohl(resolve_hostname_to_ip(aspec));
-
- if (aca->addr == INADDR_NONE)
- {
- return(-1);
- }
-
- /* build the netmask */
- aca->mask = 0;
- for (i=1; i <= masklength ; i++)
- {
- aca->mask |= (1 << (32 - i));
- }
-
- /* now mask off the host portion of the ip address
- * (i.e. save on the network portion of the address).
- */
- aca->addr = aca->addr & aca->mask;
-
- return(0);
-
-}
-#endif /* def FEATURE_ACL */
-
-
-/*********************************************************************
- *
- * Function : match_portlist
- *
- * Description : Check if a given number is covered by a comma
- * separated list of numbers and ranges (a,b-c,d,..)
- *
- * Parameters :
- * 1 : portlist = String with list
- * 2 : port = port to check
- *
- * Returns : 0 => no match
- * 1 => match
- *
- *********************************************************************/
-int match_portlist(const char *portlist, int port)
-{
- char *min, *max, *next, *portlist_copy;
-
- min = next = portlist_copy = strdup(portlist);
-
- /*
- * Zero-terminate first item and remember offset for next
- */
- if (NULL != (next = strchr(portlist_copy, (int) ',')))
- {
- *next++ = '\0';
- }
-
- /*
- * Loop through all items, checking for match
- */
- while(min)
- {
- if (NULL == (max = strchr(min, (int) '-')))
- {
- /*
- * No dash, check for equality
- */
- if (port == atoi(min))
- {
- free(portlist_copy);
- return(1);
- }
- }
- else
- {
- /*
- * This is a range, so check if between min and max,
- * or, if max was omitted, between min and 65K
- */
- *max++ = '\0';
- if(port >= atoi(min) && port <= (atoi(max) ? atoi(max) : 65535))
- {
- free(portlist_copy);
- return(1);
- }
-
- }
-
- /*
- * Jump to next item
- */
- min = next;
-
- /*
- * Zero-terminate next item and remember offset for n+1
- */
- if ((NULL != next) && (NULL != (next = strchr(next, (int) ','))))
- {
- *next++ = '\0';
- }
- }
-
- free(portlist_copy);
- return 0;
-
-}
-
-
-/*********************************************************************
- *
- * Function : block_url
- *
- * Description : Called from `chat'. Check to see if we need to block this.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : NULL => unblocked, else HTTP block response
- *
- *********************************************************************/
-struct http_response *block_url(struct client_state *csp)
-{
-#ifdef FEATURE_IMAGE_BLOCKING
- char *p;
-#endif /* def FEATURE_IMAGE_BLOCKING */
- struct http_response *rsp;
-
- /*
- * If it's not blocked, don't block it ;-)
- */
- if ((csp->action->flags & ACTION_BLOCK) == 0)
- {
- return NULL;
- }
-
- /*
- * Else, prepare a response
- */
- if (NULL == (rsp = alloc_http_response()))
- {
- return cgi_error_memory();
- }
-
- /*
- * If it's an image-url, send back an image or redirect
- * as specified by the relevant +image action
- */
-#ifdef FEATURE_IMAGE_BLOCKING
- if (((csp->action->flags & ACTION_IMAGE_BLOCKER) != 0)
- && is_imageurl(csp))
- {
- /* determine HOW images should be blocked */
- p = csp->action->string[ACTION_STRING_IMAGE_BLOCKER];
-
-#if 1 /* Two alternative strategies, use this one for now: */
-
- /* and handle accordingly: */
- if ((p == NULL) || (0 == strcmpic(p, "pattern")))
- {
-#ifdef FEATURE_ACTIVITY_CONSOLE
- accumulate_stats(STATS_IMAGE_BLOCK, 1);
-#endif /* def FEATURE_ACTIVITY_CONSOLE */
- rsp->body = bindup(image_pattern_data, image_pattern_length);
- if (rsp->body == NULL)
- {
- free_http_response(rsp);
- return cgi_error_memory();
- }
- rsp->content_length = image_pattern_length;
-
- if (enlist_unique_header(rsp->headers, "Content-Type", BUILTIN_IMAGE_MIMETYPE))
- {
- free_http_response(rsp);
- return cgi_error_memory();
- }
- }
-
- else if (0 == strcmpic(p, "blank"))
- {
-#ifdef FEATURE_ACTIVITY_CONSOLE
- accumulate_stats(STATS_IMAGE_BLOCK, 1);
-#endif /* def FEATURE_ACTIVITY_CONSOLE */
- rsp->body = bindup(image_blank_data, image_blank_length);
- if (rsp->body == NULL)
- {
- free_http_response(rsp);
- return cgi_error_memory();
- }
- rsp->content_length = image_blank_length;
-
- if (enlist_unique_header(rsp->headers, "Content-Type", BUILTIN_IMAGE_MIMETYPE))
- {
- free_http_response(rsp);
- return cgi_error_memory();
- }
- }
-
- else if (0 == strcmpic(p, "custom"))
- {
- rsp->body = bindup(csp->config->image_blocker_data, csp->config->image_blocker_length);
- if (rsp->body == NULL)
- {
- free_http_response(rsp);
- return cgi_error_memory();
- }
- rsp->content_length = csp->config->image_blocker_length;
-
- if (enlist_unique_header(rsp->headers, "Content-Type", csp->config->image_blocker_format))
- {
- free_http_response(rsp);
- return cgi_error_memory();
- }
- }
-
- else
- {
- rsp->status = strdup("302 Local Redirect from Privoxy");
- if (rsp->status == NULL)
- {
- free_http_response(rsp);
- return cgi_error_memory();
- }
-
- if (enlist_unique_header(rsp->headers, "Location", p))
- {
- free_http_response(rsp);
- return cgi_error_memory();
- }
- }
-
-#else /* Following code is disabled for now */
-
- /* and handle accordingly: */
- if ((p == NULL) || (0 == strcmpic(p, "pattern")))
- {
- p = CGI_PREFIX "send-banner?type=pattern";
- }
- else if (0 == strcmpic(p, "blank"))
- {
- p = CGI_PREFIX "send-banner?type=blank";
- }
- rsp->status = strdup("302 Local Redirect from Privoxy");
- if (rsp->status == NULL)
- {
- free_http_response(rsp);
- return cgi_error_memory();
- }
-
- if (enlist_unique_header(rsp->headers, "Location", p))
- {
- free_http_response(rsp);
- return cgi_error_memory();
- }
-#endif /* Preceeding code is disabled for now */
- }
- else
-#endif /* def FEATURE_IMAGE_BLOCKING */
-
- /*
- * Else, generate an HTML "blocked" message:
- */
- {
- jb_err err;
- struct map * exports;
-
- /*
- * Workaround for stupid Netscape bug which prevents
- * pages from being displayed if loading a referenced
- * JavaScript or style sheet fails. So make it appear
- * as if it succeeded.
- */
- if ( NULL != (p = get_header_value(csp->headers, "User-Agent:"))
- && !strncmpic(p, "mozilla", 7) /* Catch Netscape but */
- && !strstr(p, "Gecko") /* save Mozilla, */
- && !strstr(p, "compatible") /* MSIE */
- && !strstr(p, "Opera")) /* and Opera. */
- {
- rsp->status = strdup("200 Request for blocked URL");
- }
- else
- {
- rsp->status = strdup("404 Request for blocked URL");
- }
-
- if (rsp->status == NULL)
- {
- free_http_response(rsp);
- return cgi_error_memory();
- }
-
- exports = default_exports(csp, NULL);
- if (exports == NULL)
- {
- free_http_response(rsp);
- return cgi_error_memory();
- }
-
-#ifdef FEATURE_FORCE_LOAD
- err = map(exports, "force-prefix", 1, FORCE_PREFIX, 1);
- if (csp->http->ssl != 0)
-#endif /* ndef FEATURE_FORCE_LOAD */
- {
- err = map_block_killer(exports, "force-support");
- }
-
- if (!err) err = map(exports, "protocol", 1, csp->http->ssl ? "https://" : "http://", 1);
- if (!err) err = map(exports, "hostport", 1, html_encode(csp->http->hostport), 0);
- if (!err) err = map(exports, "path", 1, html_encode(csp->http->path), 0);
-
- if (err)
- {
- free_map(exports);
- free_http_response(rsp);
- return cgi_error_memory();
- }
-
- err = template_fill_for_cgi(csp, "blocked", exports, rsp);
- if (err)
- {
- free_http_response(rsp);
- return cgi_error_memory();
- }
- }
-
- return finish_http_response(rsp);
-
-}
-
-
-#ifdef FEATURE_TRUST
-/*********************************************************************
- *
- * Function : trust_url FIXME: I should be called distrust_url
- *
- * Description : Calls is_untrusted_url to determine if the URL is trusted
- * and if not, returns a HTTP 304 response with a reject message.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : NULL => trusted, else http_response.
- *
- *********************************************************************/
-struct http_response *trust_url(struct client_state *csp)
-{
- struct http_response *rsp;
- struct map * exports;
- char buf[BUFFER_SIZE];
- char *p;
- struct url_spec **tl;
- struct url_spec *t;
- jb_err err;
-
- /*
- * Don't bother to work on trusted URLs
- */
- if (!is_untrusted_url(csp))
- {
- return NULL;
- }
-
- /*
- * Else, prepare a response:
- */
- if (NULL == (rsp = alloc_http_response()))
- {
- return cgi_error_memory();
- }
-
- exports = default_exports(csp, NULL);
- if (exports == NULL)
- {
- free_http_response(rsp);
- return cgi_error_memory();
- }
-
- /*
- * Export the protocol, host, port, and referrer information
- */
- err = map(exports, "hostport", 1, csp->http->hostport, 1);
- if (!err) err = map(exports, "protocol", 1, csp->http->ssl ? "https://" : "http://", 1);
- if (!err) err = map(exports, "path", 1, csp->http->path, 1);
-
- if (NULL != (p = get_header_value(csp->headers, "Referer:")))
- {
- if (!err) err = map(exports, "referrer", 1, html_encode(p), 0);
- }
- else
- {
- if (!err) err = map(exports, "referrer", 1, "unknown", 1);
- }
-
- if (err)
- {
- free_map(exports);
- free_http_response(rsp);
- return cgi_error_memory();
- }
-
- /*
- * Export the trust list
- */
- p = strdup("");
- for (tl = csp->config->trust_list; (t = *tl) != NULL ; tl++)
- {
- sprintf(buf, "<li>%s</li>\n", t->spec);
- string_append(&p, buf);
- }
- err = map(exports, "trusted-referrers", 1, p, 0);
-
- if (err)
- {
- free_map(exports);
- free_http_response(rsp);
- return cgi_error_memory();
- }
-
- /*
- * Export the trust info, if available
- */
- if (csp->config->trust_info->first)
- {
- struct list_entry *l;
-
- p = strdup("");
- for (l = csp->config->trust_info->first; l ; l = l->next)
- {
- sprintf(buf, "<li> <a href=\"%s\">%s</a><br>\n",l->str, l->str);
- string_append(&p, buf);
- }
- err = map(exports, "trust-info", 1, p, 0);
- }
- else
- {
- err = map_block_killer(exports, "have-trust-info");
- }
-
- if (err)
- {
- free_map(exports);
- free_http_response(rsp);
- return cgi_error_memory();
- }
-
- /*
- * Export the force prefix or the force conditional block killer
- */
-#ifdef FEATURE_FORCE_LOAD
- err = map(exports, "force-prefix", 1, FORCE_PREFIX, 1);
-#else /* ifndef FEATURE_FORCE_LOAD */
- err = map_block_killer(exports, "force-support");
-#endif /* ndef FEATURE_FORCE_LOAD */
-
- if (err)
- {
- free_map(exports);
- free_http_response(rsp);
- return cgi_error_memory();
- }
-
- /*
- * Build the response
- */
- err = template_fill_for_cgi(csp, "untrusted", exports, rsp);
- if (err)
- {
- free_http_response(rsp);
- return cgi_error_memory();
- }
-
- return finish_http_response(rsp);
-}
-#endif /* def FEATURE_TRUST */
-
-
-#ifdef FEATURE_FAST_REDIRECTS
-/*********************************************************************
- *
- * Function : redirect_url
- *
- * Description : Checks for redirection URLs and returns a HTTP redirect
- * to the destination URL, if necessary
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : NULL if URL was clean, HTTP redirect otherwise.
- *
- *********************************************************************/
-struct http_response *redirect_url(struct client_state *csp)
-{
- char *p, *q;
- struct http_response *rsp;
-
- p = q = csp->http->path;
- log_error(LOG_LEVEL_REDIRECTS, "checking path for redirects: %s", p);
-
- /*
- * find the last URL encoded in the request
- */
- while ((p = strstr(p, "http://")) != NULL)
- {
- q = p++;
- }
-
- /*
- * if there was any, generate and return a HTTP redirect
- */
- if (q != csp->http->path)
- {
- log_error(LOG_LEVEL_REDIRECTS, "redirecting to: %s", q);
-
- if (NULL == (rsp = alloc_http_response()))
- {
- return cgi_error_memory();
- }
-
- if ( enlist_unique_header(rsp->headers, "Location", q)
- || (NULL == (rsp->status = strdup("302 Local Redirect from Privoxy"))) )
- {
- free_http_response(rsp);
- return cgi_error_memory();
- }
-
- return finish_http_response(rsp);
- }
- else
- {
- return NULL;
- }
-
-}
-#endif /* def FEATURE_FAST_REDIRECTS */
-
-
-#ifdef FEATURE_IMAGE_BLOCKING
-/*********************************************************************
- *
- * Function : is_imageurl
- *
- * Description : Given a URL, decide whether it is an image or not,
- * using either the info from a previous +image action
- * or, #ifdef FEATURE_IMAGE_DETECT_MSIE, and the browser
- * is MSIE and not on a Mac, tell from the browser's accept
- * header.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : True (nonzero) if URL is an image, false (0)
- * otherwise
- *
- *********************************************************************/
-int is_imageurl(struct client_state *csp)
-{
-#ifdef FEATURE_IMAGE_DETECT_MSIE
- char *tmp;
-
- tmp = get_header_value(csp->headers, "User-Agent:");
- if (tmp && strstr(tmp, "MSIE") && !strstr(tmp, "Mac_"))
- {
- tmp = get_header_value(csp->headers, "Accept:");
- if (tmp && strstr(tmp, "image/gif"))
- {
- /* Client will accept HTML. If this seems counterintuitive,
- * blame Microsoft.
- */
- return(0);
- }
- else
- {
- return(1);
- }
- }
-#endif /* def FEATURE_IMAGE_DETECT_MSIE */
-
- return ((csp->action->flags & ACTION_IMAGE) != 0);
-
-}
-#endif /* def FEATURE_IMAGE_BLOCKING */
-
-
-#ifdef FEATURE_TRUST
-/*********************************************************************
- *
- * Function : is_untrusted_url
- *
- * Description : Should we "distrust" this URL (and block it)?
- *
- * Yes if it matches a line in the trustfile, or if the
- * referrer matches a line starting with "+" in the
- * trustfile.
- * No otherwise.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : 0 => trusted, 1 => untrusted
- *
- *********************************************************************/
-int is_untrusted_url(struct client_state *csp)
-{
- struct file_list *fl;
- struct block_spec *b;
- struct url_spec **trusted_url;
- struct http_request rhttp[1];
- const char * referer;
- jb_err err;
-
- /*
- * If we don't have a trustlist, we trust everybody
- */
- if (((fl = csp->tlist) == NULL) || ((b = fl->f) == NULL))
- {
- return 0;
- }
-
- memset(rhttp, '\0', sizeof(*rhttp));
-
- /*
- * Do we trust the request URL itself?
- */
- for (b = b->next; b ; b = b->next)
- {
- if (url_match(b->url, csp->http))
- {
- return b->reject;
- }
- }
-
- if (NULL == (referer = get_header_value(csp->headers, "Referer:")))
- {
- /* no referrer was supplied */
- return 1;
- }
-
-
- /*
- * If not, do we maybe trust its referrer?
- */
- err = parse_http_url(referer, rhttp, csp);
- if (err)
- {
- return 1;
- }
-
- for (trusted_url = csp->config->trust_list; *trusted_url != NULL; trusted_url++)
- {
- if (url_match(*trusted_url, rhttp))
- {
- /* if the URL's referrer is from a trusted referrer, then
- * add the target spec to the trustfile as an unblocked
- * domain and return NULL (which means it's OK).
- */
-
- FILE *fp;
-
- if (NULL != (fp = fopen(csp->config->trustfile, "a")))
- {
- char * path;
- char * path_end;
- char * new_entry = strdup("~");
-
- string_append(&new_entry, csp->http->hostport);
-
- path = csp->http->path;
- if ( (path[0] == '/')
- && (path[1] == '~')
- && ((path_end = strchr(path + 2, '/')) != NULL))
- {
- /* since this path points into a user's home space
- * be sure to include this spec in the trustfile.
- */
- int path_len = path_end - path; /* save offset */
- path = strdup(path); /* Copy string */
- if (path != NULL)
- {
- path_end = path + path_len; /* regenerate ptr to new buffer */
- *(path_end + 1) = '\0'; /* Truncate path after '/' */
- }
- string_join(&new_entry, path);
- }
-
- if (new_entry != NULL)
- {
- fprintf(fp, "%s\n", new_entry);
- free(new_entry);
- }
- else
- {
- /* FIXME: No way to handle out-of memory, so mostly ignoring it */
- log_error(LOG_LEVEL_ERROR, "Out of memory adding pattern to trust file");
- }
-
- fclose(fp);
- }
- return 0;
- }
- }
- return 1;
-}
-#endif /* def FEATURE_TRUST */
-
-
-/*********************************************************************
- *
- * Function : pcrs_filter_response
- *
- * Description : Execute all text substitutions from all applying
- * +filter actions on the text buffer that's been accumulated
- * in csp->iob->buf. If this changes the contents, set
- * csp->content_length to the modified size and raise the
- * CSP_FLAG_MODIFIED flag.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : a pointer to the (newly allocated) modified buffer.
- * or NULL if there were no hits or something went wrong
- *
- *********************************************************************/
-char *pcrs_filter_response(struct client_state *csp)
-{
- int hits=0;
- size_t size, prev_size;
-
- char *old_buf = csp->iob->cur, *new_buf = NULL;
- pcrs_job *job;
-
- struct file_list *fl;
- struct re_filterfile_spec *b;
- struct list_entry *filtername;
-
- /*
- * Sanity first
- */
- if (csp->iob->cur >= csp->iob->eod)
- {
- return(NULL);
- }
- size = csp->iob->eod - csp->iob->cur;
-
- if ( ( NULL == (fl = csp->rlist) ) || ( NULL == fl->f) )
- {
- log_error(LOG_LEVEL_ERROR, "Unable to get current state of regexp filtering.");
- return(NULL);
- }
-
- /*
- * If the body has a "chunked" transfer-encoding,
- * get rid of it first, adjusting size and iob->eod
- */
- if (csp->flags & CSP_FLAG_CHUNKED)
- {
- log_error(LOG_LEVEL_RE_FILTER, "Need to de-chunk first");
- if (0 == (size = remove_chunked_transfer_coding(csp->iob->cur, size)))
- {
- return(NULL);
- }
- csp->iob->eod = csp->iob->cur + size;
- csp->flags |= CSP_FLAG_MODIFIED;
- }
-
- /*
- * For all applying +filter actions, look if a filter by that
- * name exists and if yes, execute it's pcrs_joblist on the
- * buffer.
- */
- for (b = fl->f; b; b = b->next)
- {
- for (filtername = csp->action->multi[ACTION_MULTI_FILTER]->first;
- filtername ; filtername = filtername->next)
- {
- if (strcmp(b->name, filtername->str) == 0)
- {
- int current_hits = 0;
-
- if ( NULL == b->joblist )
- {
- log_error(LOG_LEVEL_RE_FILTER, "Filter %s has empty joblist. Nothing to do.", b->name);
- continue;
- }
-
- prev_size = size;
- /* Apply all jobs from the joblist */
- for (job = b->joblist; NULL != job; job = job->next)
- {
- current_hits += pcrs_execute(job, old_buf, size, &new_buf, &size);
- if (old_buf != csp->iob->cur) free(old_buf);
- old_buf=new_buf;
- }
-
- log_error(LOG_LEVEL_RE_FILTER, "re_filtering %s%s (size %d) with filter %s produced %d hits (new size %d).",
- csp->http->hostport, csp->http->path, prev_size, b->name, current_hits, size);
-
- hits += current_hits;
- }
- }
- }
-
- /*
- * If there were no hits, destroy our copy and let
- * chat() use the original in csp->iob
- */
- if (!hits)
- {
- free(new_buf);
- return(NULL);
- }
-#ifdef FEATURE_ACTIVITY_CONSOLE
- else
- accumulate_stats(STATS_FILTER, hits);
-#endif /* def FEATURE_ACTIVITY_CONSOLE */
-
- csp->flags |= CSP_FLAG_MODIFIED;
- csp->content_length = size;
- IOB_RESET(csp);
-
- return(new_buf);
-
-}
-
-
-/*********************************************************************
- *
- * Function : gif_deanimate_response
- *
- * Description : Deanimate the GIF image that has been accumulated in
- * csp->iob->buf, set csp->content_length to the modified
- * size and raise the CSP_FLAG_MODIFIED flag.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : a pointer to the (newly allocated) modified buffer.
- * or NULL in case something went wrong.
- *
- *********************************************************************/
-char *gif_deanimate_response(struct client_state *csp)
-{
- struct binbuffer *in, *out;
- char *p;
- size_t size = csp->iob->eod - csp->iob->cur;
-
- /*
- * If the body has a "chunked" transfer-encoding,
- * get rid of it first, adjusting size and iob->eod
- */
- if (csp->flags & CSP_FLAG_CHUNKED)
- {
- log_error(LOG_LEVEL_DEANIMATE, "Need to de-chunk first");
- if (0 == (size = remove_chunked_transfer_coding(csp->iob->cur, size)))
- {
- return(NULL);
- }
- csp->iob->eod = csp->iob->cur + size;
- csp->flags |= CSP_FLAG_MODIFIED;
- }
-
- if ( (NULL == (in = (struct binbuffer *)zalloc(sizeof *in )))
- || (NULL == (out = (struct binbuffer *)zalloc(sizeof *out))) )
- {
- log_error(LOG_LEVEL_DEANIMATE, "failed! (no mem)");
- return NULL;
- }
-
- in->buffer = csp->iob->cur;
- in->size = size;
-
- if (gif_deanimate(in, out, strncmp("last", csp->action->string[ACTION_STRING_DEANIMATE], 4)))
- {
- log_error(LOG_LEVEL_DEANIMATE, "failed! (gif parsing)");
- free(in);
- buf_free(out);
- return(NULL);
- }
- else
- {
- if ((int)size == out->offset)
- {
- log_error(LOG_LEVEL_DEANIMATE, "GIF not changed.");
- }
- else
- {
-#ifdef FEATURE_ACTIVITY_CONSOLE
- accumulate_stats(STATS_GIF_DEANIMATE, 1);
-#endif /* def FEATURE_ACTIVITY_CONSOLE */
- log_error(LOG_LEVEL_DEANIMATE, "Success! GIF shrunk from %d bytes to %d.", size, out->offset);
- }
- csp->content_length = out->offset;
- csp->flags |= CSP_FLAG_MODIFIED;
- p = out->buffer;
- free(in);
- free(out);
- return(p);
- }
-
-}
-
-
-/*********************************************************************
- *
- * Function : jpeg_inspect_response
- *
- * Description :
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : a pointer to the (newly allocated) modified buffer
- * or NULL in case something went wrong.
- *
- *********************************************************************/
-char *jpeg_inspect_response(struct client_state *csp)
-{
- struct binbuffer *in = NULL, *out = NULL;
- char *p = NULL;
- size_t size = csp->iob->eod - csp->iob->cur;
-
- /*
- * If the body has a "chunked" transfer-encoding,
- * get rid of it first, adjusting size and iob->eod
- */
- if (csp->flags & CSP_FLAG_CHUNKED)
- {
- log_error(LOG_LEVEL_DEANIMATE, "Need to de-chunk first");
- if (0 == (size = remove_chunked_transfer_coding(csp->iob->cur, size)))
- {
- return(NULL);
- }
- csp->iob->eod = csp->iob->cur + size;
- csp->flags |= CSP_FLAG_MODIFIED;
- }
-
- if (NULL == (in = (struct binbuffer *)zalloc(sizeof *in )))
- {
- log_error(LOG_LEVEL_DEANIMATE, "failed! (jpeg no mem 1)");
- return NULL;
- }
-
- if (NULL == (out = (struct binbuffer *)zalloc(sizeof *out)))
- {
- log_error(LOG_LEVEL_DEANIMATE, "failed! (jpeg no mem 2)");
- return NULL;
- }
-
- in->buffer = csp->iob->cur;
- in->size = size;
-
- /*
- * Calling jpeg_inspect has the side-effect of creating and
- * modifying the image buffer of "out" directly.
- */
- if (jpeg_inspect(in, out))
- {
- log_error(LOG_LEVEL_DEANIMATE, "failed! (jpeg parsing)");
- free(in);
- buf_free(out);
- return(NULL);
-
- }
- else
- {
- csp->content_length = out->offset;
- csp->flags |= CSP_FLAG_MODIFIED;
- p = out->buffer;
- free(in);
- free(out);
- return(p);
- }
-
-}
-
-
-/*********************************************************************
- *
- * Function : remove_chunked_transfer_coding
- *
- * Description : In-situ remove the "chunked" transfer coding as defined
- * in rfc2616 from a buffer.
- *
- * Parameters :
- * 1 : buffer = Pointer to the text buffer
- * 2 : size = Number of bytes to be processed
- *
- * Returns : The new size, i.e. the number of bytes from buffer which
- * are occupied by the stripped body, or 0 in case something
- * went wrong
- *
- *********************************************************************/
-int remove_chunked_transfer_coding(char *buffer, const size_t size)
-{
- size_t newsize = 0;
- unsigned int chunksize = 0;
- char *from_p, *to_p;
-
- assert(buffer);
- from_p = to_p = buffer;
-
- if (sscanf(buffer, "%x", &chunksize) != 1)
- {
- log_error(LOG_LEVEL_ERROR, "Invalid first chunksize while stripping \"chunked\" transfer coding");
- return(0);
- }
-
- while (chunksize > 0)
- {
- if (NULL == (from_p = strstr(from_p, "\r\n")))
- {
- log_error(LOG_LEVEL_ERROR, "Parse error while stripping \"chunked\" transfer coding");
- return(0);
- }
-
- if ((newsize += chunksize) >= size)
- {
- log_error(LOG_LEVEL_ERROR, "Chunksize exceeds buffer in \"chunked\" transfer coding");
- return(0);
- }
- from_p += 2;
-
- memmove(to_p, from_p, (size_t) chunksize);
- to_p = buffer + newsize;
- from_p += chunksize + 2;
-
- if (sscanf(from_p, "%x", &chunksize) != 1)
- {
- log_error(LOG_LEVEL_ERROR, "Parse error while stripping \"chunked\" transfer coding");
- return(0);
- }
- }
-
- /* FIXME: Should this get its own loglevel? */
- log_error(LOG_LEVEL_RE_FILTER, "De-chunking successful. Shrunk from %d to %d\n", size, newsize);
- return(newsize);
-
-}
-
-
-/*********************************************************************
- *
- * Function : url_actions
- *
- * Description : Gets the actions for this URL.
- *
- * Parameters :
- * 1 : http = http_request request for blocked URLs
- * 2 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : N/A
- *
- *********************************************************************/
-void url_actions(struct http_request *http,
- struct client_state *csp)
-{
- struct file_list *fl;
- struct url_actions *b;
- int i;
-
- init_current_action(csp->action);
-
- for (i = 0; i < MAX_ACTION_FILES; i++)
- {
- if (((fl = csp->actions_list[i]) == NULL) || ((b = fl->f) == NULL))
- {
- return;
- }
-
- apply_url_actions(csp->action, http, b);
- }
-
- return;
-}
-
-
-/*********************************************************************
- *
- * Function : apply_url_actions
- *
- * Description : Applies a list of URL actions.
- *
- * Parameters :
- * 1 : action = Destination.
- * 2 : http = Current URL
- * 3 : b = list of URL actions to apply
- *
- * Returns : N/A
- *
- *********************************************************************/
-void apply_url_actions(struct current_action_spec *action,
- struct http_request *http,
- struct url_actions *b)
-{
- if (b == NULL)
- {
- /* Should never happen */
- return;
- }
-
- for (b = b->next; NULL != b; b = b->next)
- {
- if (url_match(b->url, http))
- {
- merge_current_action(action, b->action);
- }
- }
-}
-
-
-/*********************************************************************
- *
- * Function : forward_url
- *
- * Description : Should we forward this to another proxy?
- *
- * Parameters :
- * 1 : http = http_request request for current URL
- * 2 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : Pointer to forwarding information.
- *
- *********************************************************************/
-const struct forward_spec * forward_url(struct http_request *http,
- struct client_state *csp)
-{
- static const struct forward_spec fwd_default[1] = { FORWARD_SPEC_INITIALIZER };
- struct forward_spec *fwd = csp->config->forward;
-
- if (fwd == NULL)
- {
- return fwd_default;
- }
-
- while (fwd != NULL)
- {
- if (url_match(fwd->url, http))
- {
- return fwd;
- }
- fwd = fwd->next;
- }
-
- return fwd_default;
-}
-
-
-/*
- Local Variables:
- tab-width: 3
- end:
-*/
projects / privoxy.git / blobdiff