1 #ifndef PARSERS_H_INCLUDED
2 #define PARSERS_H_INCLUDED
3 #define PARSERS_H_VERSION "$Id: parsers.h,v 1.36 2007/03/05 13:25:32 fabiankeil Exp $"
4 /*********************************************************************
6 * File : $Source: /cvsroot/ijbswa/current/parsers.h,v $
8 * Purpose : Declares functions to parse/crunch headers and pages.
9 * Functions declared include:
10 * `add_to_iob', `client_cookie_adder', `client_from',
11 * `client_referrer', `client_send_cookie', `client_ua',
12 * `client_uagent', `client_x_forwarded',
13 * `client_x_forwarded_adder', `client_xtra_adder',
14 * `content_type', `crumble', `destroy_list', `enlist',
15 * `flush_socket', `free_http_request', `get_header',
16 * `list_to_text', `parse_http_request', `sed',
17 * and `server_set_cookie'.
19 * Copyright : Written by and Copyright (C) 2001 the SourceForge
20 * Privoxy team. http://www.privoxy.org/
22 * Based on the Internet Junkbuster originally written
23 * by and Copyright (C) 1997 Anonymous Coders and
24 * Junkbusters Corporation. http://www.junkbusters.com
26 * This program is free software; you can redistribute it
27 * and/or modify it under the terms of the GNU General
28 * Public License as published by the Free Software
29 * Foundation; either version 2 of the License, or (at
30 * your option) any later version.
32 * This program is distributed in the hope that it will
33 * be useful, but WITHOUT ANY WARRANTY; without even the
34 * implied warranty of MERCHANTABILITY or FITNESS FOR A
35 * PARTICULAR PURPOSE. See the GNU General Public
36 * License for more details.
38 * The GNU General Public License should be included with
39 * this file. If not, you can view it at
40 * http://www.gnu.org/copyleft/gpl.html
41 * or write to the Free Software Foundation, Inc., 59
42 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
46 * Revision 1.36 2007/03/05 13:25:32 fabiankeil
47 * - Cosmetical changes for LOG_LEVEL_RE_FILTER messages.
48 * - Handle "Cookie:" and "Connection:" headers a bit smarter
49 * (don't crunch them just to recreate them later on).
50 * - Add another non-standard time format for the cookie
51 * expiration date detection.
52 * - Fix a valgrind warning.
54 * Revision 1.35 2007/01/01 19:36:37 fabiankeil
55 * Integrate a modified version of Wil Mahan's
56 * zlib patch (PR #895531).
58 * Revision 1.34 2006/12/29 19:08:22 fabiankeil
59 * Reverted parts of my last commit
60 * to keep error handling working.
62 * Revision 1.33 2006/12/29 18:04:40 fabiankeil
63 * Fixed gcc43 conversion warnings.
65 * Revision 1.32 2006/12/06 19:14:23 fabiankeil
66 * Added prototype for get_destination_from_headers().
68 * Revision 1.31 2006/08/17 17:15:10 fabiankeil
69 * - Back to timegm() using GnuPG's replacement if necessary.
70 * Using mktime() and localtime() could add a on hour offset if
71 * the randomize factor was big enough to lead to a summer/wintertime
74 * - Removed now-useless Privoxy 3.0.3 compatibility glue.
76 * - Moved randomization code into pick_from_range().
78 * - Changed parse_header_time definition.
79 * time_t isn't guaranteed to be signed and
80 * if it isn't, -1 isn't available as error code.
81 * Changed some variable types in client_if_modified_since()
82 * because of the same reason.
84 * Revision 1.30 2006/08/14 08:25:19 fabiankeil
85 * Split filter-headers{} into filter-client-headers{}
86 * and filter-server-headers{}.
87 * Added parse_header_time() to share some code.
88 * Replaced timegm() with mktime().
90 * Revision 1.29 2006/08/03 02:46:41 david__schmidt
91 * Incorporate Fabian Keil's patch work:
\rhttp://www.fabiankeil.de/sourcecode/privoxy/
93 * Revision 1.28 2006/07/18 14:48:47 david__schmidt
94 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
95 * with what was really the latest development (the v_3_0_branch branch)
97 * Revision 1.26.2.1 2002/09/25 14:52:46 oes
98 * Added basic support for OPTIONS and TRACE HTTP methods:
99 * - New parser function client_max_forwards which decrements
100 * the Max-Forwards HTTP header field of OPTIONS and TRACE
101 * requests by one before forwarding
102 * - New parser function client_host which extracts the host
103 * and port information from the HTTP header field if the
104 * request URI was not absolute
105 * - Don't crumble and re-add the Host: header, but only generate
106 * and append if missing
108 * Revision 1.26 2002/05/08 15:59:53 oes
109 * Changed add_to_iob signature (now returns jb_err)
111 * Revision 1.25 2002/03/26 22:29:55 swa
112 * we have a new homepage!
114 * Revision 1.24 2002/03/24 13:25:43 swa
115 * name change related issues
117 * Revision 1.23 2002/03/13 00:27:05 jongfoster
120 * Revision 1.22 2002/03/09 20:03:52 jongfoster
121 * - Making various functions return int rather than size_t.
122 * (Undoing a recent change). Since size_t is unsigned on
123 * Windows, functions like read_socket that return -1 on
124 * error cannot return a size_t.
126 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
127 * crashes, and also frequently caused JB to jump to 100%
128 * CPU and stay there. (Because it thought it had just
129 * read ((unsigned)-1) == 4Gb of data...)
131 * - The signature of write_socket has changed, it now simply
132 * returns success=0/failure=nonzero.
134 * - Trying to get rid of a few warnings --with-debug on
135 * Windows, I've introduced a new type "jb_socket". This is
136 * used for the socket file descriptors. On Windows, this
137 * is SOCKET (a typedef for unsigned). Everywhere else, it's
138 * an int. The error value can't be -1 any more, so it's
139 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
140 * Windows it maps to the #define INVALID_SOCKET.)
142 * - The signature of bind_port has changed.
144 * Revision 1.21 2002/03/07 03:46:17 oes
145 * Fixed compiler warnings
147 * Revision 1.20 2002/02/20 23:15:13 jongfoster
148 * Parsing functions now handle out-of-memory gracefully by returning
151 * Revision 1.19 2002/01/17 21:03:47 jongfoster
152 * Moving all our URL and URL pattern parsing code to urlmatch.c.
154 * Revision 1.18 2001/10/26 17:40:23 oes
155 * Introduced get_header_value()
156 * Removed client_accept()
158 * Revision 1.17 2001/10/13 12:47:32 joergs
159 * Removed client_host, added client_host_adder
161 * Revision 1.16 2001/10/07 18:50:16 oes
162 * Added server_content_encoding, renamed server_transfer_encoding
164 * Revision 1.15 2001/10/07 18:01:55 oes
165 * Changed server_http11 to server_http
167 * Revision 1.14 2001/10/07 15:45:48 oes
168 * added client_accept_encoding, client_te, client_accept_encoding_adder
170 * renamed content_type and content_length
172 * fixed client_host and strclean prototypes
174 * Revision 1.13 2001/09/29 12:56:03 joergs
175 * IJB now changes HTTP/1.1 to HTTP/1.0 in requests and answers.
177 * Revision 1.12 2001/09/13 23:05:50 jongfoster
178 * Changing the string paramater to the header parsers a "const".
180 * Revision 1.11 2001/07/31 14:46:53 oes
181 * Added prototype for connection_close_adder
183 * Revision 1.10 2001/07/30 22:08:36 jongfoster
184 * Tidying up #defines:
185 * - All feature #defines are now of the form FEATURE_xxx
186 * - Permanently turned off WIN_GUI_EDIT
187 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
189 * Revision 1.9 2001/07/29 18:43:08 jongfoster
190 * Changing #ifdef _FILENAME_H to FILENAME_H_INCLUDED, to conform to
193 * Revision 1.8 2001/07/13 14:01:54 oes
194 * Removed all #ifdef PCRS
196 * Revision 1.7 2001/06/29 13:32:14 oes
197 * Removed logentry from cancelled commit
199 * Revision 1.6 2001/06/03 19:12:38 oes
200 * deleted const struct interceptors
202 * Revision 1.5 2001/05/31 21:30:33 jongfoster
203 * Removed list code - it's now in list.[ch]
204 * Renamed "permission" to "action", and changed many features
205 * to use the actions file rather than the global config.
207 * Revision 1.4 2001/05/27 13:19:06 oes
208 * Patched Joergs solution for the content-length in.
210 * Revision 1.3 2001/05/26 13:39:32 jongfoster
211 * Only crunches Content-Length header if applying RE filtering.
212 * Without this fix, Microsoft Windows Update wouldn't work.
214 * Revision 1.2 2001/05/20 01:21:20 jongfoster
215 * Version 2.9.4 checkin.
216 * - Merged popupfile and cookiefile, and added control over PCRS
217 * filtering, in new "permissionsfile".
218 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
219 * file error you now get a message box (in the Win32 GUI) rather
220 * than the program exiting with no explanation.
221 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
223 * - Removed tabs from "config"
224 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
225 * - Bumped up version number.
227 * Revision 1.1.1.1 2001/05/15 13:59:01 oes
228 * Initial import of version 2.9.3 source tree
231 *********************************************************************/
240 extern const struct parsers client_patterns[];
241 extern const struct parsers server_patterns[];
242 extern const struct parsers server_patterns_light[];
244 extern const add_header_func_ptr add_client_headers[];
245 extern const add_header_func_ptr add_server_headers[];
247 extern int flush_socket(jb_socket fd, struct client_state *csp);
248 extern jb_err add_to_iob(struct client_state *csp, char *buf, int n);
249 extern jb_err decompress_iob(struct client_state *csp);
250 extern char *get_header(struct client_state *csp);
251 extern char *get_header_value(const struct list *header_list, const char *header_name);
252 extern char *sed(const struct parsers pats[], const add_header_func_ptr more_headers[], struct client_state *csp);
253 extern void get_http_time(int time_offset, char *buf);
254 extern struct tm *parse_header_time(char *header, time_t *tm);
255 extern jb_err get_destination_from_headers(const struct list *headers, struct http_request *http);
257 /* XXX: Why do we export these anyway? */
258 extern jb_err crumble (struct client_state *csp, char **header);
259 extern jb_err connection (struct client_state *csp, char **header);
260 extern jb_err filter_header (struct client_state *csp, char **header);
262 extern jb_err client_referrer (struct client_state *csp, char **header);
263 extern jb_err client_uagent (struct client_state *csp, char **header);
264 extern jb_err client_ua (struct client_state *csp, char **header);
265 extern jb_err client_from (struct client_state *csp, char **header);
266 extern jb_err client_send_cookie (struct client_state *csp, char **header);
267 extern jb_err client_x_forwarded (struct client_state *csp, char **header);
268 extern jb_err client_accept_encoding (struct client_state *csp, char **header);
269 extern jb_err client_te (struct client_state *csp, char **header);
270 extern jb_err client_max_forwards (struct client_state *csp, char **header);
271 extern jb_err client_host(struct client_state *csp, char **header);
272 extern jb_err client_if_modified_since(struct client_state *csp, char **header);
273 extern jb_err client_accept_language (struct client_state *csp, char **header);
274 extern jb_err client_if_none_match (struct client_state *csp, char **header);
275 extern jb_err crunch_client_header (struct client_state *csp, char **header);
276 extern jb_err client_x_filter (struct client_state *csp, char **header);
279 extern jb_err client_host_adder (struct client_state *csp);
280 extern jb_err client_cookie_adder (struct client_state *csp);
281 extern jb_err client_xtra_adder (struct client_state *csp);
282 extern jb_err client_accept_encoding_adder(struct client_state *csp);
283 extern jb_err client_x_forwarded_adder (struct client_state *csp);
285 extern jb_err connection_close_adder (struct client_state *csp);
287 extern jb_err server_set_cookie (struct client_state *csp, char **header);
288 extern jb_err server_content_type (struct client_state *csp, char **header);
289 extern jb_err server_content_length (struct client_state *csp, char **header);
290 extern jb_err server_content_md5 (struct client_state *csp, char **header);
291 extern jb_err server_content_encoding(struct client_state *csp, char **header);
292 extern jb_err server_transfer_coding (struct client_state *csp, char **header);
293 extern jb_err server_http (struct client_state *csp, char **header);
294 extern jb_err crunch_server_header (struct client_state *csp, char **header);
295 extern jb_err server_last_modified (struct client_state *csp, char **header);
296 extern jb_err server_content_disposition(struct client_state *csp, char **header);
298 #ifdef FEATURE_FORCE_LOAD
299 extern int strclean(const char *string, const char *substring);
300 #endif /* def FEATURE_FORCE_LOAD */
302 /* Revision control strings from this header and associated .c file */
303 extern const char parsers_rcs[];
304 extern const char parsers_h_rcs[];
312 #endif /* ndef PARSERS_H_INCLUDED */