1 const char filters_rcs[] = "$Id: filters.c,v 1.63 2006/08/31 10:11:28 fabiankeil Exp $";
2 /*********************************************************************
4 * File : $Source: /cvsroot/ijbswa/current/filters.c,v $
6 * Purpose : Declares functions to parse/crunch headers and pages.
7 * Functions declared include:
8 * `acl_addr', `add_stats', `block_acl', `block_imageurl',
9 * `block_url', `url_actions', `domain_split',
10 * `filter_popups', `forward_url', 'redirect_url',
11 * `ij_untrusted_url', `intercept_url', `pcrs_filter_respose',
12 * `ijb_send_banner', `trust_url', `gif_deanimate_response',
13 * `jpeg_inspect_response'
15 * Copyright : Written by and Copyright (C) 2001, 2004 the SourceForge
16 * Privoxy team. http://www.privoxy.org/
18 * Based on the Internet Junkbuster originally written
19 * by and Copyright (C) 1997 Anonymous Coders and
20 * Junkbusters Corporation. http://www.junkbusters.com
22 * This program is free software; you can redistribute it
23 * and/or modify it under the terms of the GNU General
24 * Public License as published by the Free Software
25 * Foundation; either version 2 of the License, or (at
26 * your option) any later version.
28 * This program is distributed in the hope that it will
29 * be useful, but WITHOUT ANY WARRANTY; without even the
30 * implied warranty of MERCHANTABILITY or FITNESS FOR A
31 * PARTICULAR PURPOSE. See the GNU General Public
32 * License for more details.
34 * The GNU General Public License should be included with
35 * this file. If not, you can view it at
36 * http://www.gnu.org/copyleft/gpl.html
37 * or write to the Free Software Foundation, Inc., 59
38 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
42 * Revision 1.63 2006/08/31 10:11:28 fabiankeil
43 * Don't free p which is still in use and will be later
44 * freed by free_map(). Don't claim the referrer is unknown
45 * when the client didn't set one.
47 * Revision 1.62 2006/08/14 00:27:47 david__schmidt
48 * Feature request 595948: Re-Filter logging in single line
50 * Revision 1.61 2006/08/03 02:46:41 david__schmidt
51 * Incorporate Fabian Keil's patch work:
\rhttp://www.fabiankeil.de/sourcecode/privoxy/
53 * Revision 1.60 2006/07/18 14:48:46 david__schmidt
54 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
55 * with what was really the latest development (the v_3_0_branch branch)
57 * Revision 1.58.2.9 2006/01/29 23:10:56 david__schmidt
58 * Multiple filter file support
60 * Revision 1.58.2.8 2005/05/07 21:50:55 david__schmidt
61 * A few memory leaks plugged (mostly on error paths)
63 * Revision 1.58.2.7 2004/10/03 12:53:32 david__schmidt
64 * Add the ability to check jpeg images for invalid
65 * lengths of comment blocks. Defensive strategy
66 * against the exploit:
67 * Microsoft Security Bulletin MS04-028
68 * Buffer Overrun in JPEG Processing (GDI+) Could
69 * Allow Code Execution (833987)
70 * Enabled with +inspect-jpegs in actions files.
72 * Revision 1.58.2.6 2003/12/06 22:18:27 gliptak
73 * Correcting compile problem with FEATURE_IMAGE_BLOCKING
75 * Revision 1.58.2.5 2003/11/11 13:10:31 oes
76 * Fixed bug #839859: "See why" link URL now gets url-encoded.
78 * Revision 1.58.2.4 2003/02/28 12:52:45 oes
81 * Revision 1.58.2.3 2002/09/25 14:51:51 oes
82 * Added basic support for OPTIONS and TRACE HTTP methods:
83 * New function direct_response which handles OPTIONS and
84 * TRACE requests whose Max-Forwards header field is zero.
86 * Revision 1.58.2.2 2002/08/01 17:18:28 oes
87 * Fixed BR 537651 / SR 579724 (MSIE image detect improper for IE/Mac)
89 * Revision 1.58.2.1 2002/07/26 15:18:53 oes
90 * - Bugfix: Executing a filters without jobs no longer results in
91 * turing off *all* filters.
92 * - Security fix: Malicious web servers can't cause a seg fault
93 * through bogus chunk sizes anymore
95 * Revision 1.58 2002/04/24 02:11:17 oes
96 * Jon's multiple AF patch: url_actions now evaluates rules
99 * Revision 1.57 2002/04/08 20:38:34 swa
102 * Revision 1.56 2002/04/05 15:51:24 oes
103 * - bugfix: error-pages now get correct request protocol
104 * - fix for invalid HTML in trust info
106 * Revision 1.55 2002/04/02 16:13:51 oes
107 * Fix: No "Go there anyway" for SSL
109 * Revision 1.54 2002/04/02 14:55:56 oes
110 * Bugfix: is_untrusted_url() now depends on FEATURE_TRUST, not FEATURE_COOKIE_JAR
112 * Revision 1.53 2002/03/26 22:29:54 swa
113 * we have a new homepage!
115 * Revision 1.52 2002/03/24 16:35:57 jongfoster
118 * Revision 1.51 2002/03/24 15:23:33 jongfoster
121 * Revision 1.50 2002/03/24 13:25:43 swa
122 * name change related issues
124 * Revision 1.49 2002/03/16 20:29:14 oes
127 * Revision 1.48 2002/03/13 20:25:34 oes
128 * Better logging for content filters
130 * Revision 1.47 2002/03/13 00:30:52 jongfoster
132 * Added option of always sending redirect for imageblock,
133 * currently disabled with #if 0.
135 * Revision 1.46 2002/03/12 01:42:49 oes
136 * Introduced modular filters
138 * Revision 1.45 2002/03/08 16:47:50 oes
139 * Added choice beween GIF and PNG built-in images
141 * Revision 1.44 2002/03/07 03:49:31 oes
142 * - Fixed compiler warnings etc
143 * - Changed built-in images from GIF to PNG
144 * (with regard to Unisys patent issue)
145 * - Added a 4x4 pattern PNG which is less intrusive
146 * than the logo but also clearly marks the deleted banners
148 * Revision 1.43 2002/01/22 23:51:59 jongfoster
149 * Replacing strsav() with the safer string_append().
151 * Adding missing html_encode() to error message generators. Where encoded
152 * and unencoded versions of a string were provided, removing the unencoded
155 * Revision 1.42 2002/01/17 21:00:32 jongfoster
156 * Moving all our URL and URL pattern parsing code to urlmatch.c.
158 * Using a single, simple url_match(pattern,url) function - rather than
159 * the 3-line match routine which was repeated all over the place.
161 * Renaming free_url to free_url_spec, since it frees a struct url_spec.
163 * Using parse_http_url() to parse URLs without faking a HTTP
164 * request line for parse_http_request().
166 * Revision 1.41 2001/11/13 00:14:07 jongfoster
167 * Fixing stupid bug now I've figured out what || means.
168 * (It always returns 0 or 1, not one of it's paramaters.)
170 * Revision 1.40 2001/10/26 17:37:55 oes
171 * - Re-enabled Netscape 200/404 bug workaround in block_url():
172 * - Removed OS/2 special case
173 * - Made block_url() independant from sed() having been run
174 * - Made trust_url independant from sed() having been run
175 * - Made is_imageurl independant from sed() having been run.
176 * It now checks User-Agent: and Accept: by itself.
179 * Revision 1.39 2001/10/25 03:40:48 david__schmidt
180 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
181 * threads to call select() simultaneously. So, it's time to do a real, live,
182 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
183 * (native). Both versions will work, but using __OS2__ offers multi-threading.
185 * Revision 1.38 2001/10/23 21:32:33 jongfoster
186 * Adding error-checking to selected functions
188 * Revision 1.37 2001/10/22 15:33:56 david__schmidt
189 * Special-cased OS/2 out of the Netscape-abort-on-404-in-js problem in
190 * filters.c. Added a FIXME in front of the offending code. I'll gladly
191 * put in a better/more robust fix for all parties if one is presented...
192 * It seems that just returning 200 instead of 404 would pretty much fix
193 * it for everyone, but I don't know all the history of the problem.
195 * Revision 1.36 2001/10/10 16:44:16 oes
196 * Added match_portlist function
198 * Revision 1.35 2001/10/07 15:41:23 oes
199 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
201 * New function remove_chunked_transfer_coding that strips chunked
202 * transfer coding to plain and is called by pcrs_filter_response
203 * and gif_deanimate_response if neccessary
205 * Improved handling of zero-change re_filter runs
207 * pcrs_filter_response and gif_deanimate_response now remove
208 * chunked transfer codeing before processing the body.
210 * Revision 1.34 2001/09/20 15:49:36 steudten
212 * Fix BUG: Change int size to size_t size in pcrs_filter_response().
213 * See cgi.c fill_template().
215 * Revision 1.33 2001/09/16 17:05:14 jongfoster
216 * Removing unused #include showarg.h
218 * Revision 1.32 2001/09/16 13:21:27 jongfoster
219 * Changes to use new list functions.
221 * Revision 1.31 2001/09/16 11:38:02 jongfoster
222 * Splitting fill_template() into 2 functions:
223 * template_load() loads the file
224 * template_fill() performs the PCRS regexps.
225 * This is because the CGI edit interface has a "table row"
226 * template which is used many times in the page - this
227 * change means it's only loaded from disk once.
229 * Revision 1.30 2001/09/16 11:00:10 jongfoster
230 * New function alloc_http_response, for symmetry with free_http_response
232 * Revision 1.29 2001/09/13 23:32:40 jongfoster
233 * Moving image data to cgi.c rather than cgi.h
234 * Fixing a GPF under Win32 (and any other OS that protects global
235 * constants from being written to).
237 * Revision 1.28 2001/09/10 10:18:51 oes
238 * Silenced compiler warnings
240 * Revision 1.27 2001/08/05 16:06:20 jongfoster
241 * Modifiying "struct map" so that there are now separate header and
242 * "map_entry" structures. This means that functions which modify a
243 * map no longer need to return a pointer to the modified map.
244 * Also, it no longer reverses the order of the entries (which may be
245 * important with some advanced template substitutions).
247 * Revision 1.26 2001/07/30 22:08:36 jongfoster
248 * Tidying up #defines:
249 * - All feature #defines are now of the form FEATURE_xxx
250 * - Permanently turned off WIN_GUI_EDIT
251 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
253 * Revision 1.25 2001/07/26 10:09:46 oes
254 * Made browser detection a little less naive
256 * Revision 1.24 2001/07/25 17:22:51 oes
257 * Added workaround for Netscape bug that prevents display of page when loading a component fails.
259 * Revision 1.23 2001/07/23 13:40:12 oes
260 * Fixed bug that caused document body to be dropped when pcrs joblist was empty.
262 * Revision 1.22 2001/07/18 12:29:34 oes
263 * - Made gif_deanimate_response respect
264 * csp->action->string[ACTION_STRING_DEANIMATE]
265 * - Logging cosmetics
267 * Revision 1.21 2001/07/13 13:59:53 oes
268 * - Introduced gif_deanimate_response which shares the
269 * generic content modification interface of pcrs_filter_response
270 * and acts as a wrapper to deanimate.c:gif_deanimate()
271 * - Renamed re_process_buffer to pcrs_filter_response
272 * - pcrs_filter_response now returns NULL on failiure
273 * - Removed all #ifdef PCRS
275 * Revision 1.20 2001/07/01 17:01:04 oes
276 * Added comments and missing return statement in is_untrusted_url()
278 * Revision 1.19 2001/06/29 21:45:41 oes
279 * Indentation, CRLF->LF, Tab-> Space
281 * Revision 1.18 2001/06/29 13:27:38 oes
282 * - Cleaned up, renamed and reorderd functions
283 * and improved comments
286 * - Ported to CGI platform. Now delivers
287 * http_response or NULL
288 * - Unified HTML and GIF generation (moved image detection
289 * and GIF generation here from jcc.c:chat())
290 * - Fixed HTTP status to:
291 * - 403 (Forbidden) for the "blocked" HTML message
292 * - 200 (OK) for GIF answers
293 * - 302 (Redirect) for redirect to GIF
296 * - Ported to CGI platform. Now delivers
297 * http_response or NULL
298 * - Separated detection of untrusted URL into
299 * (bool)is_untrusted_url
300 * - Added enforcement of untrusted requests
302 * - Moved redirect_url() from cgi.c to here
303 * and ported it to the CGI platform
305 * - Removed logentry from cancelled commit
307 * Revision 1.17 2001/06/09 10:55:28 jongfoster
308 * Changing BUFSIZ ==> BUFFER_SIZE
310 * Revision 1.16 2001/06/07 23:10:26 jongfoster
311 * Allowing unanchored domain patterns to back off and retry
312 * if they partially match. Optimized right-anchored patterns.
313 * Moving ACL and forward files into config file.
314 * Replacing struct gateway with struct forward_spec
316 * Revision 1.15 2001/06/03 19:12:00 oes
317 * extracted-CGI relevant stuff
319 * Revision 1.14 2001/06/01 10:30:55 oes
320 * Added optional left-anchoring to domaincmp
322 * Revision 1.13 2001/05/31 21:21:30 jongfoster
323 * Permissionsfile / actions file changes:
324 * - Changed "permission" to "action" throughout
325 * - changes to file format to allow string parameters
326 * - Moved helper functions to actions.c
328 * Revision 1.12 2001/05/31 17:35:20 oes
330 * - Enhanced domain part globbing with infix and prefix asterisk
331 * matching and optional unanchored operation
333 * Revision 1.11 2001/05/29 11:53:23 oes
334 * "See why" link added to "blocked" page
336 * Revision 1.10 2001/05/29 09:50:24 jongfoster
337 * Unified blocklist/imagelist/permissionslist.
338 * File format is still under discussion, but the internal changes
341 * Also modified interceptor behaviour:
342 * - We now intercept all URLs beginning with one of the following
343 * prefixes (and *only* these prefixes):
345 * * http://ijbswa.sf.net/config/
346 * * http://ijbswa.sourceforge.net/config/
347 * - New interceptors "home page" - go to http://i.j.b/ to see it.
348 * - Internal changes so that intercepted and fast redirect pages
349 * are not replaced with an image.
350 * - Interceptors now have the option to send a binary page direct
351 * to the client. (i.e. ijb-send-banner uses this)
352 * - Implemented show-url-info interceptor. (Which is why I needed
353 * the above interceptors changes - a typical URL is
354 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
355 * The previous mechanism would not have intercepted that, and
356 * if it had been intercepted then it then it would have replaced
359 * Revision 1.9 2001/05/27 22:17:04 oes
361 * - re_process_buffer no longer writes the modified buffer
362 * to the client, which was very ugly. It now returns the
363 * buffer, which it is then written by chat.
365 * - content_length now adjusts the Content-Length: header
366 * for modified documents rather than crunch()ing it.
367 * (Length info in csp->content_length, which is 0 for
368 * unmodified documents)
370 * - For this to work, sed() is called twice when filtering.
372 * Revision 1.8 2001/05/26 17:13:28 jongfoster
373 * Filled in a function comment.
375 * Revision 1.7 2001/05/26 15:26:15 jongfoster
376 * ACL feature now provides more security by immediately dropping
377 * connections from untrusted hosts.
379 * Revision 1.6 2001/05/26 00:28:36 jongfoster
380 * Automatic reloading of config file.
381 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
382 * Most of the global variables have been moved to a new
383 * struct configuration_spec, accessed through csp->config->globalname
384 * Most of the globals remaining are used by the Win32 GUI.
386 * Revision 1.5 2001/05/25 22:34:30 jongfoster
389 * Revision 1.4 2001/05/22 18:46:04 oes
391 * - Enabled filtering banners by size rather than URL
392 * by adding patterns that replace all standard banner
393 * sizes with the "Junkbuster" gif to the re_filterfile
395 * - Enabled filtering WebBugs by providing a pattern
396 * which kills all 1x1 images
398 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
399 * which is selected by the (nonstandard and therefore
400 * capital) letter 'U' in the option string.
401 * It causes the quantifiers to be ungreedy by default.
402 * Appending a ? turns back to greedy (!).
404 * - Added a new interceptor ijb-send-banner, which
405 * sends back the "Junkbuster" gif. Without imagelist or
406 * MSIE detection support, or if tinygif = 1, or the
407 * URL isn't recognized as an imageurl, a lame HTML
408 * explanation is sent instead.
410 * - Added new feature, which permits blocking remote
411 * script redirects and firing back a local redirect
413 * The feature is conditionally compiled, i.e. it
414 * can be disabled with --disable-fast-redirects,
415 * plus it must be activated by a "fast-redirects"
416 * line in the config file, has its own log level
417 * and of course wants to be displayed by show-proxy-args
418 * Note: Boy, all the #ifdefs in 1001 locations and
419 * all the fumbling with configure.in and acconfig.h
420 * were *way* more work than the feature itself :-(
422 * - Because a generic redirect template was needed for
423 * this, tinygif = 3 now uses the same.
425 * - Moved GIFs, and other static HTTP response templates
430 * - Removed some >400 CRs again (Jon, you really worked
433 * Revision 1.3 2001/05/20 16:44:47 jongfoster
434 * Removing last hardcoded Junkbusters.com URLs.
436 * Revision 1.2 2001/05/20 01:21:20 jongfoster
437 * Version 2.9.4 checkin.
438 * - Merged popupfile and cookiefile, and added control over PCRS
439 * filtering, in new "permissionsfile".
440 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
441 * file error you now get a message box (in the Win32 GUI) rather
442 * than the program exiting with no explanation.
443 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
445 * - Removed tabs from "config"
446 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
447 * - Bumped up version number.
449 * Revision 1.1.1.1 2001/05/15 13:58:52 oes
450 * Initial import of version 2.9.3 source tree
453 *********************************************************************/
459 #include <sys/types.h>
468 #endif /* ndef __OS2__ */
469 #include <netinet/in.h>
471 #include <winsock2.h>
472 #endif /* ndef _WIN32 */
476 #endif /* def __OS2__ */
484 #include "jbsockets.h"
485 #include "miscutil.h"
489 #include "deanimate.h"
490 #include "urlmatch.h"
496 const char filters_h_rcs[] = FILTERS_H_VERSION;
498 /* Fix a problem with Solaris. There should be no effect on other
500 * Solaris's isspace() is a macro which uses it's argument directly
501 * as an array index. Therefore we need to make sure that high-bit
502 * characters generate +ve values, and ideally we also want to make
503 * the argument match the declared parameter type of "int".
505 #define ijb_isdigit(__X) isdigit((int)(unsigned char)(__X))
509 /*********************************************************************
511 * Function : block_acl
513 * Description : Block this request?
514 * Decide yes or no based on ACL file.
517 * 1 : dst = The proxy or gateway address this is going to.
518 * Or NULL to check all possible targets.
519 * 2 : csp = Current client state (buffers, headers, etc...)
520 * Also includes the client IP address.
522 * Returns : 0 = FALSE (don't block) and 1 = TRUE (do block)
524 *********************************************************************/
525 int block_acl(struct access_control_addr *dst, struct client_state *csp)
527 struct access_control_list *acl = csp->config->acl;
529 /* if not using an access control list, then permit the connection */
535 /* search the list */
538 if ((csp->ip_addr_long & acl->src->mask) == acl->src->addr)
542 /* Just want to check if they have any access */
543 if (acl->action == ACL_PERMIT)
548 else if ( ((dst->addr & acl->dst->mask) == acl->dst->addr)
549 && ((dst->port == acl->dst->port) || (acl->dst->port == 0)))
551 if (acl->action == ACL_PERMIT)
569 /*********************************************************************
571 * Function : acl_addr
573 * Description : Called from `load_config' to parse an ACL address.
576 * 1 : aspec = String specifying ACL address.
577 * 2 : aca = struct access_control_addr to fill in.
579 * Returns : 0 => Ok, everything else is an error.
581 *********************************************************************/
582 int acl_addr(char *aspec, struct access_control_addr *aca)
584 int i, masklength, port;
590 if ((p = strchr(aspec, '/')) != NULL)
594 if (ijb_isdigit(*p) == 0)
598 masklength = atoi(p);
601 if ((masklength < 0) || (masklength > 32))
606 if ((p = strchr(aspec, ':')) != NULL)
610 if (ijb_isdigit(*p) == 0)
619 aca->addr = ntohl(resolve_hostname_to_ip(aspec));
621 if (aca->addr == INADDR_NONE)
626 /* build the netmask */
628 for (i=1; i <= masklength ; i++)
630 aca->mask |= (1 << (32 - i));
633 /* now mask off the host portion of the ip address
634 * (i.e. save on the network portion of the address).
636 aca->addr = aca->addr & aca->mask;
641 #endif /* def FEATURE_ACL */
644 /*********************************************************************
646 * Function : match_portlist
648 * Description : Check if a given number is covered by a comma
649 * separated list of numbers and ranges (a,b-c,d,..)
652 * 1 : portlist = String with list
653 * 2 : port = port to check
655 * Returns : 0 => no match
658 *********************************************************************/
659 int match_portlist(const char *portlist, int port)
661 char *min, *max, *next, *portlist_copy;
663 min = next = portlist_copy = strdup(portlist);
666 * Zero-terminate first item and remember offset for next
668 if (NULL != (next = strchr(portlist_copy, (int) ',')))
674 * Loop through all items, checking for match
678 if (NULL == (max = strchr(min, (int) '-')))
681 * No dash, check for equality
683 if (port == atoi(min))
692 * This is a range, so check if between min and max,
693 * or, if max was omitted, between min and 65K
696 if(port >= atoi(min) && port <= (atoi(max) ? atoi(max) : 65535))
710 * Zero-terminate next item and remember offset for n+1
712 if ((NULL != next) && (NULL != (next = strchr(next, (int) ','))))
724 /*********************************************************************
726 * Function : block_url
728 * Description : Called from `chat'. Check to see if we need to block this.
731 * 1 : csp = Current client state (buffers, headers, etc...)
733 * Returns : NULL => unblocked, else HTTP block response
735 *********************************************************************/
736 struct http_response *block_url(struct client_state *csp)
738 struct http_response *rsp;
739 const char *new_content_type = NULL;
742 * If it's not blocked, don't block it ;-)
744 if ((csp->action->flags & ACTION_BLOCK) == 0)
748 if (csp->action->flags & ACTION_REDIRECT)
750 log_error(LOG_LEVEL_ERROR, "redirect{} overruled by block.");
753 * Else, prepare a response
755 if (NULL == (rsp = alloc_http_response()))
757 return cgi_error_memory();
761 * If it's an image-url, send back an image or redirect
762 * as specified by the relevant +image action
764 #ifdef FEATURE_IMAGE_BLOCKING
765 if (((csp->action->flags & ACTION_IMAGE_BLOCKER) != 0)
769 /* determine HOW images should be blocked */
770 p = csp->action->string[ACTION_STRING_IMAGE_BLOCKER];
772 if(csp->action->flags & ACTION_HANDLE_AS_EMPTY_DOCUMENT)
774 log_error(LOG_LEVEL_ERROR, "handle-as-empty-document overruled by handle-as-image.");
776 #if 1 /* Two alternative strategies, use this one for now: */
778 /* and handle accordingly: */
779 if ((p == NULL) || (0 == strcmpic(p, "pattern")))
781 rsp->status = strdup("403 Request blocked by Privoxy");
782 if (rsp->status == NULL)
784 free_http_response(rsp);
785 return cgi_error_memory();
787 rsp->body = bindup(image_pattern_data, image_pattern_length);
788 if (rsp->body == NULL)
790 free_http_response(rsp);
791 return cgi_error_memory();
793 rsp->content_length = image_pattern_length;
795 if (enlist_unique_header(rsp->headers, "Content-Type", BUILTIN_IMAGE_MIMETYPE))
797 free_http_response(rsp);
798 return cgi_error_memory();
802 else if (0 == strcmpic(p, "blank"))
804 rsp->status = strdup("403 Request blocked by Privoxy");
805 if (rsp->status == NULL)
807 free_http_response(rsp);
808 return cgi_error_memory();
810 rsp->body = bindup(image_blank_data, image_blank_length);
811 if (rsp->body == NULL)
813 free_http_response(rsp);
814 return cgi_error_memory();
816 rsp->content_length = image_blank_length;
818 if (enlist_unique_header(rsp->headers, "Content-Type", BUILTIN_IMAGE_MIMETYPE))
820 free_http_response(rsp);
821 return cgi_error_memory();
827 rsp->status = strdup("302 Local Redirect from Privoxy");
828 if (rsp->status == NULL)
830 free_http_response(rsp);
831 return cgi_error_memory();
834 if (enlist_unique_header(rsp->headers, "Location", p))
836 free_http_response(rsp);
837 return cgi_error_memory();
841 #else /* Following code is disabled for now */
843 /* and handle accordingly: */
844 if ((p == NULL) || (0 == strcmpic(p, "pattern")))
846 p = CGI_PREFIX "send-banner?type=pattern";
848 else if (0 == strcmpic(p, "blank"))
850 p = CGI_PREFIX "send-banner?type=blank";
852 rsp->status = strdup("302 Local Redirect from Privoxy");
853 if (rsp->status == NULL)
855 free_http_response(rsp);
856 return cgi_error_memory();
859 if (enlist_unique_header(rsp->headers, "Location", p))
861 free_http_response(rsp);
862 return cgi_error_memory();
864 #endif /* Preceeding code is disabled for now */
866 else if(csp->action->flags & ACTION_HANDLE_AS_EMPTY_DOCUMENT)
869 * Send empty document.
871 new_content_type = csp->action->string[ACTION_STRING_CONTENT_TYPE];
874 rsp->body = strdup(" ");
875 rsp->content_length = 1;
877 rsp->status = strdup("403 Request blocked by Privoxy");
878 if (rsp->status == NULL)
880 free_http_response(rsp);
881 return cgi_error_memory();
883 if (new_content_type != 0)
885 log_error(LOG_LEVEL_HEADER, "Overwriting Content-Type with %s", new_content_type);
886 if (enlist_unique_header(rsp->headers, "Content-Type", new_content_type))
888 free_http_response(rsp);
889 return cgi_error_memory();
895 #endif /* def FEATURE_IMAGE_BLOCKING */
898 * Else, generate an HTML "blocked" message:
902 struct map * exports;
906 * Workaround for stupid Netscape bug which prevents
907 * pages from being displayed if loading a referenced
908 * JavaScript or style sheet fails. So make it appear
909 * as if it succeeded.
911 if ( NULL != (p = get_header_value(csp->headers, "User-Agent:"))
912 && !strncmpic(p, "mozilla", 7) /* Catch Netscape but */
913 && !strstr(p, "Gecko") /* save Mozilla, */
914 && !strstr(p, "compatible") /* MSIE */
915 && !strstr(p, "Opera")) /* and Opera. */
917 rsp->status = strdup("200 Request for blocked URL");
921 rsp->status = strdup("404 Request for blocked URL");
924 if (rsp->status == NULL)
926 free_http_response(rsp);
927 return cgi_error_memory();
930 exports = default_exports(csp, NULL);
933 free_http_response(rsp);
934 return cgi_error_memory();
937 #ifdef FEATURE_FORCE_LOAD
938 err = map(exports, "force-prefix", 1, FORCE_PREFIX, 1);
939 if (csp->http->ssl != 0)
940 #endif /* ndef FEATURE_FORCE_LOAD */
942 err = map_block_killer(exports, "force-support");
945 if (!err) err = map(exports, "protocol", 1, csp->http->ssl ? "https://" : "http://", 1);
946 if (!err) err = map(exports, "hostport", 1, html_encode(csp->http->hostport), 0);
947 if (!err) err = map(exports, "path", 1, html_encode(csp->http->path), 0);
948 if (!err) err = map(exports, "path-ue", 1, url_encode(csp->http->path), 0);
953 free_http_response(rsp);
954 return cgi_error_memory();
957 err = template_fill_for_cgi(csp, "blocked", exports, rsp);
960 free_http_response(rsp);
961 return cgi_error_memory();
965 return finish_http_response(rsp);
971 /*********************************************************************
973 * Function : trust_url FIXME: I should be called distrust_url
975 * Description : Calls is_untrusted_url to determine if the URL is trusted
976 * and if not, returns a HTTP 403 response with a reject message.
979 * 1 : csp = Current client state (buffers, headers, etc...)
981 * Returns : NULL => trusted, else http_response.
983 *********************************************************************/
984 struct http_response *trust_url(struct client_state *csp)
986 struct http_response *rsp;
987 struct map * exports;
988 char buf[BUFFER_SIZE];
990 struct url_spec **tl;
995 * Don't bother to work on trusted URLs
997 if (!is_untrusted_url(csp))
1003 * Else, prepare a response:
1005 if (NULL == (rsp = alloc_http_response()))
1007 return cgi_error_memory();
1010 rsp->status = strdup("403 Request blocked by Privoxy");
1011 exports = default_exports(csp, NULL);
1012 if (exports == NULL || rsp->status == NULL)
1014 free_http_response(rsp);
1015 return cgi_error_memory();
1019 * Export the protocol, host, port, and referrer information
1021 err = map(exports, "hostport", 1, csp->http->hostport, 1);
1022 if (!err) err = map(exports, "protocol", 1, csp->http->ssl ? "https://" : "http://", 1);
1023 if (!err) err = map(exports, "path", 1, csp->http->path, 1);
1025 if (NULL != (p = get_header_value(csp->headers, "Referer:")))
1027 if (!err) err = map(exports, "referrer", 1, html_encode(p), 0);
1031 if (!err) err = map(exports, "referrer", 1, "none set", 1);
1037 free_http_response(rsp);
1038 return cgi_error_memory();
1042 * Export the trust list
1045 for (tl = csp->config->trust_list; (t = *tl) != NULL ; tl++)
1047 sprintf(buf, "<li>%s</li>\n", t->spec);
1048 string_append(&p, buf);
1050 err = map(exports, "trusted-referrers", 1, p, 0);
1055 free_http_response(rsp);
1056 return cgi_error_memory();
1060 * Export the trust info, if available
1062 if (csp->config->trust_info->first)
1064 struct list_entry *l;
1067 for (l = csp->config->trust_info->first; l ; l = l->next)
1069 sprintf(buf, "<li> <a href=\"%s\">%s</a><br>\n",l->str, l->str);
1070 string_append(&p, buf);
1072 err = map(exports, "trust-info", 1, p, 0);
1076 err = map_block_killer(exports, "have-trust-info");
1082 free_http_response(rsp);
1083 return cgi_error_memory();
1087 * Export the force prefix or the force conditional block killer
1089 #ifdef FEATURE_FORCE_LOAD
1090 err = map(exports, "force-prefix", 1, FORCE_PREFIX, 1);
1091 #else /* ifndef FEATURE_FORCE_LOAD */
1092 err = map_block_killer(exports, "force-support");
1093 #endif /* ndef FEATURE_FORCE_LOAD */
1098 free_http_response(rsp);
1099 return cgi_error_memory();
1103 * Build the response
1105 err = template_fill_for_cgi(csp, "untrusted", exports, rsp);
1108 free_http_response(rsp);
1109 return cgi_error_memory();
1112 return finish_http_response(rsp);
1114 #endif /* def FEATURE_TRUST */
1117 #ifdef FEATURE_FAST_REDIRECTS
1118 /*********************************************************************
1120 * Function : redirect_url
1122 * Description : Checks for redirection URLs and returns a HTTP redirect
1123 * to the destination URL, if necessary
1126 * 1 : csp = Current client state (buffers, headers, etc...)
1128 * Returns : NULL if URL was clean, HTTP redirect otherwise.
1130 *********************************************************************/
1131 struct http_response *redirect_url(struct client_state *csp)
1134 struct http_response *rsp;
1135 char *redirect_mode = NULL;
1138 if ((csp->action->flags & ACTION_REDIRECT))
1140 q = csp->action->string[ACTION_STRING_REDIRECT];
1144 redirect_mode = csp->action->string[ACTION_STRING_FAST_REDIRECTS];
1145 if (0 == strcmpic(redirect_mode, "check-decoded-url"))
1147 p = q = csp->http->path;
1148 log_error(LOG_LEVEL_REDIRECTS, "Decoding path: %s if necessary.", p);
1151 if (*p == '%') /* Escape sequence? */
1153 /* Yes, translate from hexadecimal to decimal */
1167 /* No, forward character. */
1173 p = q = csp->http->path;
1174 log_error(LOG_LEVEL_REDIRECTS, "Checking path for redirects: %s", p);
1177 * find the last URL encoded in the request
1179 while ((p = strstr(p, "http://")) != NULL)
1185 * if there was any, generate and return a HTTP redirect
1187 if (q != csp->http->path)
1189 log_error(LOG_LEVEL_REDIRECTS, "redirecting to: %s", q);
1191 if (NULL == (rsp = alloc_http_response()))
1193 return cgi_error_memory();
1196 if ( enlist_unique_header(rsp->headers, "Location", q)
1197 || (NULL == (rsp->status = strdup("302 Local Redirect from Privoxy"))) )
1199 free_http_response(rsp);
1200 return cgi_error_memory();
1203 return finish_http_response(rsp);
1211 #endif /* def FEATURE_FAST_REDIRECTS */
1214 #ifdef FEATURE_IMAGE_BLOCKING
1215 /*********************************************************************
1217 * Function : is_imageurl
1219 * Description : Given a URL, decide whether it is an image or not,
1220 * using either the info from a previous +image action
1221 * or, #ifdef FEATURE_IMAGE_DETECT_MSIE, and the browser
1222 * is MSIE and not on a Mac, tell from the browser's accept
1226 * 1 : csp = Current client state (buffers, headers, etc...)
1228 * Returns : True (nonzero) if URL is an image, false (0)
1231 *********************************************************************/
1232 int is_imageurl(struct client_state *csp)
1234 #ifdef FEATURE_IMAGE_DETECT_MSIE
1237 tmp = get_header_value(csp->headers, "User-Agent:");
1238 if (tmp && strstr(tmp, "MSIE") && !strstr(tmp, "Mac_"))
1240 tmp = get_header_value(csp->headers, "Accept:");
1241 if (tmp && strstr(tmp, "image/gif"))
1243 /* Client will accept HTML. If this seems counterintuitive,
1253 #endif /* def FEATURE_IMAGE_DETECT_MSIE */
1255 return ((csp->action->flags & ACTION_IMAGE) != 0);
1258 #endif /* def FEATURE_IMAGE_BLOCKING */
1261 #ifdef FEATURE_TRUST
1262 /*********************************************************************
1264 * Function : is_untrusted_url
1266 * Description : Should we "distrust" this URL (and block it)?
1268 * Yes if it matches a line in the trustfile, or if the
1269 * referrer matches a line starting with "+" in the
1274 * 1 : csp = Current client state (buffers, headers, etc...)
1276 * Returns : 0 => trusted, 1 => untrusted
1278 *********************************************************************/
1279 int is_untrusted_url(struct client_state *csp)
1281 struct file_list *fl;
1282 struct block_spec *b;
1283 struct url_spec **trusted_url;
1284 struct http_request rhttp[1];
1285 const char * referer;
1289 * If we don't have a trustlist, we trust everybody
1291 if (((fl = csp->tlist) == NULL) || ((b = fl->f) == NULL))
1296 memset(rhttp, '\0', sizeof(*rhttp));
1299 * Do we trust the request URL itself?
1301 for (b = b->next; b ; b = b->next)
1303 if (url_match(b->url, csp->http))
1309 if (NULL == (referer = get_header_value(csp->headers, "Referer:")))
1311 /* no referrer was supplied */
1317 * If not, do we maybe trust its referrer?
1319 err = parse_http_url(referer, rhttp, csp);
1325 for (trusted_url = csp->config->trust_list; *trusted_url != NULL; trusted_url++)
1327 if (url_match(*trusted_url, rhttp))
1329 /* if the URL's referrer is from a trusted referrer, then
1330 * add the target spec to the trustfile as an unblocked
1331 * domain and return NULL (which means it's OK).
1336 if (NULL != (fp = fopen(csp->config->trustfile, "a")))
1340 char * new_entry = strdup("~");
1342 string_append(&new_entry, csp->http->hostport);
1344 path = csp->http->path;
1345 if ( (path[0] == '/')
1347 && ((path_end = strchr(path + 2, '/')) != NULL))
1349 /* since this path points into a user's home space
1350 * be sure to include this spec in the trustfile.
1352 int path_len = path_end - path; /* save offset */
1353 path = strdup(path); /* Copy string */
1356 path_end = path + path_len; /* regenerate ptr to new buffer */
1357 *(path_end + 1) = '\0'; /* Truncate path after '/' */
1359 string_join(&new_entry, path);
1362 if (new_entry != NULL)
1364 fprintf(fp, "%s\n", new_entry);
1369 /* FIXME: No way to handle out-of memory, so mostly ignoring it */
1370 log_error(LOG_LEVEL_ERROR, "Out of memory adding pattern to trust file");
1380 #endif /* def FEATURE_TRUST */
1383 /*********************************************************************
1385 * Function : pcrs_filter_response
1387 * Description : Execute all text substitutions from all applying
1388 * +filter actions on the text buffer that's been accumulated
1389 * in csp->iob->buf. If this changes the contents, set
1390 * csp->content_length to the modified size and raise the
1391 * CSP_FLAG_MODIFIED flag.
1394 * 1 : csp = Current client state (buffers, headers, etc...)
1396 * Returns : a pointer to the (newly allocated) modified buffer.
1397 * or NULL if there were no hits or something went wrong
1399 *********************************************************************/
1400 char *pcrs_filter_response(struct client_state *csp)
1403 size_t size, prev_size;
1405 char *old = csp->iob->cur, *new = NULL;
1408 struct file_list *fl;
1409 struct re_filterfile_spec *b;
1410 struct list_entry *filtername;
1412 int i, found_filters = 0;
1417 if (csp->iob->cur >= csp->iob->eod)
1421 size = csp->iob->eod - csp->iob->cur;
1424 * Need to check the set of re_filterfiles...
1426 for (i = 0; i < MAX_AF_FILES; i++)
1439 if (0 == found_filters)
1441 log_error(LOG_LEVEL_ERROR, "Unable to get current state of regexp filtering.");
1446 * If the body has a "chunked" transfer-encoding,
1447 * get rid of it first, adjusting size and iob->eod
1449 if (csp->flags & CSP_FLAG_CHUNKED)
1451 log_error(LOG_LEVEL_RE_FILTER, "Need to de-chunk first");
1452 if (0 == (size = remove_chunked_transfer_coding(csp->iob->cur, size)))
1456 csp->iob->eod = csp->iob->cur + size;
1457 csp->flags |= CSP_FLAG_MODIFIED;
1460 for (i = 0; i < MAX_AF_FILES; i++)
1463 if ((NULL == fl) || (NULL == fl->f))
1466 * For all applying +filter actions, look if a filter by that
1467 * name exists and if yes, execute it's pcrs_joblist on the
1470 for (b = fl->f; b; b = b->next)
1472 for (filtername = csp->action->multi[ACTION_MULTI_FILTER]->first;
1473 filtername ; filtername = filtername->next)
1475 if (strcmp(b->name, filtername->str) == 0)
1477 int current_hits = 0;
1479 if ( NULL == b->joblist )
1481 log_error(LOG_LEVEL_RE_FILTER, "Filter %s has empty joblist. Nothing to do.", b->name);
1486 /* Apply all jobs from the joblist */
1487 for (job = b->joblist; NULL != job; job = job->next)
1489 current_hits += pcrs_execute(job, old, size, &new, &size);
1490 if (old != csp->iob->cur) free(old);
1494 log_error(LOG_LEVEL_RE_FILTER, "re_filtering %s%s (size %d) with filter %s produced %d hits (new size %d).",
1495 csp->http->hostport, csp->http->path, prev_size, b->name, current_hits, size);
1497 hits += current_hits;
1504 * If there were no hits, destroy our copy and let
1505 * chat() use the original in csp->iob
1513 csp->flags |= CSP_FLAG_MODIFIED;
1514 csp->content_length = size;
1522 /*********************************************************************
1524 * Function : gif_deanimate_response
1526 * Description : Deanimate the GIF image that has been accumulated in
1527 * csp->iob->buf, set csp->content_length to the modified
1528 * size and raise the CSP_FLAG_MODIFIED flag.
1531 * 1 : csp = Current client state (buffers, headers, etc...)
1533 * Returns : a pointer to the (newly allocated) modified buffer.
1534 * or NULL in case something went wrong.
1536 *********************************************************************/
1537 char *gif_deanimate_response(struct client_state *csp)
1539 struct binbuffer *in, *out;
1541 size_t size = csp->iob->eod - csp->iob->cur;
1544 * If the body has a "chunked" transfer-encoding,
1545 * get rid of it first, adjusting size and iob->eod
1547 if (csp->flags & CSP_FLAG_CHUNKED)
1549 log_error(LOG_LEVEL_DEANIMATE, "Need to de-chunk first");
1550 if (0 == (size = remove_chunked_transfer_coding(csp->iob->cur, size)))
1554 csp->iob->eod = csp->iob->cur + size;
1555 csp->flags |= CSP_FLAG_MODIFIED;
1558 if ( (NULL == (in = (struct binbuffer *)zalloc(sizeof *in )))
1559 || (NULL == (out = (struct binbuffer *)zalloc(sizeof *out))) )
1561 log_error(LOG_LEVEL_DEANIMATE, "failed! (no mem)");
1565 in->buffer = csp->iob->cur;
1568 if (gif_deanimate(in, out, strncmp("last", csp->action->string[ACTION_STRING_DEANIMATE], 4)))
1570 log_error(LOG_LEVEL_DEANIMATE, "failed! (gif parsing)");
1577 if ((int)size == out->offset)
1579 log_error(LOG_LEVEL_DEANIMATE, "GIF not changed.");
1583 log_error(LOG_LEVEL_DEANIMATE, "Success! GIF shrunk from %d bytes to %d.", size, out->offset);
1585 csp->content_length = out->offset;
1586 csp->flags |= CSP_FLAG_MODIFIED;
1596 /*********************************************************************
1598 * Function : jpeg_inspect_response
1603 * 1 : csp = Current client state (buffers, headers, etc...)
1605 * Returns : a pointer to the (newly allocated) modified buffer
1606 * or NULL in case something went wrong.
1608 *********************************************************************/
1609 char *jpeg_inspect_response(struct client_state *csp)
1611 struct binbuffer *in = NULL, *out = NULL;
1613 size_t size = csp->iob->eod - csp->iob->cur;
1616 * If the body has a "chunked" transfer-encoding,
1617 * get rid of it first, adjusting size and iob->eod
1619 if (csp->flags & CSP_FLAG_CHUNKED)
1621 log_error(LOG_LEVEL_DEANIMATE, "Need to de-chunk first");
1622 if (0 == (size = remove_chunked_transfer_coding(csp->iob->cur, size)))
1626 csp->iob->eod = csp->iob->cur + size;
1627 csp->flags |= CSP_FLAG_MODIFIED;
1630 if (NULL == (in = (struct binbuffer *)zalloc(sizeof *in )))
1632 log_error(LOG_LEVEL_DEANIMATE, "failed! (jpeg no mem 1)");
1636 if (NULL == (out = (struct binbuffer *)zalloc(sizeof *out)))
1638 log_error(LOG_LEVEL_DEANIMATE, "failed! (jpeg no mem 2)");
1642 in->buffer = csp->iob->cur;
1646 * Calling jpeg_inspect has the side-effect of creating and
1647 * modifying the image buffer of "out" directly.
1649 if (jpeg_inspect(in, out))
1651 log_error(LOG_LEVEL_DEANIMATE, "failed! (jpeg parsing)");
1659 csp->content_length = out->offset;
1660 csp->flags |= CSP_FLAG_MODIFIED;
1670 /*********************************************************************
1672 * Function : remove_chunked_transfer_coding
1674 * Description : In-situ remove the "chunked" transfer coding as defined
1675 * in rfc2616 from a buffer.
1678 * 1 : buffer = Pointer to the text buffer
1679 * 2 : size = Number of bytes to be processed
1681 * Returns : The new size, i.e. the number of bytes from buffer which
1682 * are occupied by the stripped body, or 0 in case something
1685 *********************************************************************/
1686 int remove_chunked_transfer_coding(char *buffer, const size_t size)
1689 unsigned int chunksize = 0;
1690 char *from_p, *to_p;
1693 from_p = to_p = buffer;
1695 if (sscanf(buffer, "%x", &chunksize) != 1)
1697 log_error(LOG_LEVEL_ERROR, "Invalid first chunksize while stripping \"chunked\" transfer coding");
1701 while (chunksize > 0)
1703 if (NULL == (from_p = strstr(from_p, "\r\n")))
1705 log_error(LOG_LEVEL_ERROR, "Parse error while stripping \"chunked\" transfer coding");
1709 if ((newsize += chunksize) >= size)
1711 log_error(LOG_LEVEL_ERROR, "Chunksize exceeds buffer in \"chunked\" transfer coding");
1716 memmove(to_p, from_p, (size_t) chunksize);
1717 to_p = buffer + newsize;
1718 from_p += chunksize + 2;
1720 if (sscanf(from_p, "%x", &chunksize) != 1)
1722 log_error(LOG_LEVEL_ERROR, "Parse error while stripping \"chunked\" transfer coding");
1727 /* FIXME: Should this get its own loglevel? */
1728 log_error(LOG_LEVEL_RE_FILTER, "De-chunking successful. Shrunk from %d to %d\n", size, newsize);
1734 /*********************************************************************
1736 * Function : url_actions
1738 * Description : Gets the actions for this URL.
1741 * 1 : http = http_request request for blocked URLs
1742 * 2 : csp = Current client state (buffers, headers, etc...)
1746 *********************************************************************/
1747 void url_actions(struct http_request *http,
1748 struct client_state *csp)
1750 struct file_list *fl;
1751 struct url_actions *b;
1754 init_current_action(csp->action);
1756 for (i = 0; i < MAX_AF_FILES; i++)
1758 if (((fl = csp->actions_list[i]) == NULL) || ((b = fl->f) == NULL))
1763 apply_url_actions(csp->action, http, b);
1770 /*********************************************************************
1772 * Function : apply_url_actions
1774 * Description : Applies a list of URL actions.
1777 * 1 : action = Destination.
1778 * 2 : http = Current URL
1779 * 3 : b = list of URL actions to apply
1783 *********************************************************************/
1784 void apply_url_actions(struct current_action_spec *action,
1785 struct http_request *http,
1786 struct url_actions *b)
1790 /* Should never happen */
1794 for (b = b->next; NULL != b; b = b->next)
1796 if (url_match(b->url, http))
1798 merge_current_action(action, b->action);
1804 /*********************************************************************
1806 * Function : forward_url
1808 * Description : Should we forward this to another proxy?
1811 * 1 : http = http_request request for current URL
1812 * 2 : csp = Current client state (buffers, headers, etc...)
1814 * Returns : Pointer to forwarding information.
1816 *********************************************************************/
1817 const struct forward_spec * forward_url(struct http_request *http,
1818 struct client_state *csp)
1820 static const struct forward_spec fwd_default[1] = { FORWARD_SPEC_INITIALIZER };
1821 struct forward_spec *fwd = csp->config->forward;
1830 if (url_match(fwd->url, http))
1841 /*********************************************************************
1843 * Function : direct_response
1845 * Description : Check if Max-Forwards == 0 for an OPTIONS or TRACE
1846 * request and if so, return a HTTP 501 to the client.
1848 * FIXME: I have a stupid name and I should handle the
1849 * requests properly. Still, what we do here is rfc-
1850 * compliant, whereas ignoring or forwarding are not.
1853 * 1 : csp = Current client state (buffers, headers, etc...)
1855 * Returns : http_response if , NULL if nonmatch or handler fail
1857 *********************************************************************/
1858 struct http_response *direct_response(struct client_state *csp)
1860 struct http_response *rsp;
1861 struct list_entry *p;
1863 if ((0 == strcmpic(csp->http->gpc, "trace"))
1864 || (0 == strcmpic(csp->http->gpc, "options")))
1866 for (p = csp->headers->first; (p != NULL) ; p = p->next)
1868 if (!strncmp("Max-Forwards:", p->str, 13)
1869 && (*(p->str+13) != '\0') && (atoi(p->str+13) == 0))
1871 /* FIXME: We could handle at least TRACE here,
1872 but that would require a verbatim copy of
1873 the request which we don't have anymore */
1875 log_error(LOG_LEVEL_HEADER, "Found Max-Forwards:0 in OPTIONS or TRACE request -- Returning 501");
1877 /* Get mem for response or fail*/
1878 if (NULL == (rsp = alloc_http_response()))
1880 return cgi_error_memory();
1883 if (NULL == (rsp->status = strdup("501 Not Implemented")))
1885 free_http_response(rsp);
1886 return cgi_error_memory();
1890 return(finish_http_response(rsp));