- * Revisions :
- * $Log: cgisimple.c,v $
- * Revision 1.85 2008/05/26 17:30:55 fabiankeil
- * Provide an OpenSearch Description to access the
- * show-url-info page through "search engine plugins".
- *
- * Revision 1.84 2008/05/26 16:16:55 fabiankeil
- * Spell error correctly.
- *
- * Revision 1.83 2008/05/12 14:51:30 fabiankeil
- * Don't complain about an invalid URL if show-url-info is requested
- * without parameters. Regression introduced in 1.81 by yours truly.
- *
- * Revision 1.82 2008/05/10 20:01:47 fabiankeil
- * Fix an assertion that could erroneously
- * trigger in case of memory shortage.
- *
- * Revision 1.81 2008/05/05 09:54:39 fabiankeil
- * In cgi_show_url_info(), make sure ftp URLs are
- * declared invalid. Also simplify the code that adds
- * "http://" if no protocol has been specified.
- *
- * Revision 1.80 2008/05/04 16:18:32 fabiankeil
- * Provide parse_http_url() with a third parameter to specify
- * whether or not URLs without protocol are acceptable.
- *
- * Revision 1.79 2008/05/04 13:30:56 fabiankeil
- * Streamline parse_http_url()'s prototype.
- *
- * Revision 1.78 2008/05/03 16:50:11 fabiankeil
- * Leverage content_filters_enabled() in cgi_show_url_info().
- *
- * Revision 1.77 2008/05/02 09:47:48 fabiankeil
- * In cgi_show_url_info, pass an initialized http structure
- * to parse_http_url() as that will be required soonish and
- * assert that https URLs are recognized correctly.
- *
- * Revision 1.76 2008/04/28 09:13:30 fabiankeil
- * In load_file(), remember the error reason and fclose()
- * and return later on instead of right away.
- *
- * Revision 1.75 2008/04/27 13:52:52 fabiankeil
- * Move CGI file loading code into load_file() and
- * add checks for unexpected errors.
- *
- * Revision 1.74 2008/04/26 15:50:56 fabiankeil
- * Fix macro name in cgi_show_file() error path.
- *
- * Revision 1.73 2008/04/26 12:21:55 fabiankeil
- * Forget about JB_ERR_PARSE. JB_ERR_CGI_PARAMS to the rescue.
- *
- * Revision 1.72 2008/04/26 10:34:15 fabiankeil
- * If zlib support is unavailable and there are content filters active
- * but the prevent-compression action is disabled, include a warning
- * on the show-url-info page that compression might prevent filtering.
- *
- * Revision 1.71 2008/04/25 13:33:56 fabiankeil
- * - Factor cgi_show_file() out of cgi_show_status().
- * - Adjust cgi_show_status()'s parameter description to match reality.
- *
- * Revision 1.70 2008/04/24 16:12:38 fabiankeil
- * In cgi_show_status(), load the requested file at once.
- * Using string_join() for every line really doesn't scale.
- *
- * Revision 1.69 2008/04/17 14:40:48 fabiankeil
- * Provide get_http_time() with the buffer size so it doesn't
- * have to blindly assume that the buffer is big enough.
- *
- * Revision 1.68 2008/03/27 18:27:21 fabiankeil
- * Remove kill-popups action.
- *
- * Revision 1.67 2008/03/27 17:00:05 fabiankeil
- * Turn the favicon blobs into locals.
- *
- * Revision 1.66 2008/02/23 16:57:12 fabiankeil
- * Rename url_actions() to get_url_actions() and let it
- * use the standard parameter ordering.
- *
- * Revision 1.65 2008/02/23 16:33:43 fabiankeil
- * Let forward_url() use the standard parameter ordering
- * and mark its second parameter immutable.
- *
- * Revision 1.64 2008/02/03 13:56:07 fabiankeil
- * Add SOCKS5 support for show-url-info CGI page.
- *
- * Revision 1.63 2008/02/01 06:04:31 fabiankeil
- * If edit buttons on the show-url-info CGI page are hidden, explain why.
- *
- * Revision 1.62 2008/02/01 05:52:40 fabiankeil
- * Hide edit buttons on the show-url-info CGI page if enable-edit-action
- * is disabled. Patch by Lee with additional white space adjustments.
- *
- * Revision 1.61 2008/01/26 11:13:25 fabiankeil
- * If enable-edit-actions is disabled, hide the edit buttons and explain why.
- *
- * Revision 1.60 2007/10/27 13:12:13 fabiankeil
- * Finish 1.49 and check write access before
- * showing edit buttons on show-url-info page.
- *
- * Revision 1.59 2007/10/19 16:42:36 fabiankeil
- * Plug memory leak I introduced five months ago.
- * Yay Valgrind and Privoxy-Regression-Test.
- *
- * Revision 1.58 2007/07/21 12:19:50 fabiankeil
- * If show-url-info is called with an URL that Privoxy
- * would reject as invalid, don't show unresolved forwarding
- * variables, "final matches" or claim the site's secure.
- *
- * Revision 1.57 2007/06/01 16:53:05 fabiankeil
- * Adjust cgi_show_url_info() to show what forward-override{}
- * would do with the requested URL (instead of showing how the
- * request for the CGI page would be forwarded if it wasn't a
- * CGI request).
- *
- * Revision 1.56 2007/05/21 10:50:35 fabiankeil
- * - Use strlcpy() instead of strcpy().
- * - Stop treating actions files special. Expect a complete file name
- * (with or without path) like it's done for the rest of the files.
- * Closes FR#588084.
- * - Don't rerun sed() in cgi_show_request().
- *
- * Revision 1.55 2007/04/13 13:36:46 fabiankeil
- * Reference action files in CGI URLs by id instead
- * of using the first part of the file name.
- * Fixes BR 1694250 and BR 1590556.
- *
- * Revision 1.54 2007/04/09 18:11:35 fabiankeil
- * Don't mistake VC++'s _snprintf() for a snprintf() replacement.
- *
- * Revision 1.53 2007/04/08 13:21:04 fabiankeil
- * Reference action files in CGI URLs by id instead
- * of using the first part of the file name.
- * Fixes BR 1694250 and BR 1590556.
- *
- * Revision 1.52 2007/02/13 15:10:26 fabiankeil
- * Apparently fopen()ing in "binary" mode doesn't require
- * #ifdefs, it's already done without them in cgiedit.c.
- *
- * Revision 1.51 2007/02/10 16:55:22 fabiankeil
- * - Show forwarding settings on the show-url-info page
- * - Fix some HTML syntax errors.
- *
- * Revision 1.50 2007/01/23 15:51:17 fabiankeil
- * Add favicon delivery functions.
- *
- * Revision 1.49 2007/01/20 16:29:38 fabiankeil
- * Suppress edit buttons for action files if Privoxy has
- * no write access. Suggested by Roland in PR 1564026.
- *
- * Revision 1.48 2007/01/20 15:31:31 fabiankeil
- * Display warning if show-url-info CGI page
- * is used while Privoxy is toggled off.
- *
- * Revision 1.47 2007/01/12 15:07:10 fabiankeil
- * Use zalloc in cgi_send_user_manual.
- *
- * Revision 1.46 2007/01/02 12:49:46 fabiankeil
- * Add FEATURE_ZLIB to the list of conditional
- * defines at the show-status page.
- *
- * Revision 1.45 2006/12/28 18:16:41 fabiankeil
- * Fixed gcc43 compiler warnings, zero out cgi_send_user_manual's
- * body memory before using it, replaced sprintf calls with snprintf.
- *
- * Revision 1.44 2006/12/22 14:19:27 fabiankeil
- * Removed checks whether or not AF_FILES have
- * data structures associated with them in cgi_show_status.
- * It doesn't matter as we're only interested in the file names.
- *
- * For the action files the checks were always true,
- * but they prevented empty filter files from being
- * listed. Fixes parts of BR 1619208.
- *
- * Revision 1.43 2006/12/17 17:57:56 fabiankeil
- * - Added FEATURE_GRACEFUL_TERMINATION to the
- * "conditional #defines" section
- * - Escaped ampersands in generated HTML.
- * - Renamed re-filter-filename to re-filter-filenames
- *
- * Revision 1.42 2006/11/21 15:43:12 fabiankeil
- * Add special treatment for WIN32 to make sure
- * cgi_send_user_manual opens the files in binary mode.
- * Fixes BR 1600411 and unbreaks image delivery.
- *
- * Remove outdated comment.
- *
- * Revision 1.41 2006/10/09 19:18:28 roro
- * Redirect http://p.p/user-manual (without trailing slash) to
- * http://p.p/user-manual/ (with trailing slash), otherwise links will be broken.
- *
- * Revision 1.40 2006/09/09 13:05:33 fabiankeil
- * Modified cgi_send_user_manual to serve binary
- * content without destroying it first. Should also be
- * faster now. Added ".jpg" check for Content-Type guessing.
- *
- * Revision 1.39 2006/09/08 09:49:23 fabiankeil
- * Deliver documents in the user-manual directory
- * with "Content-Type text/css" if their filename
- * ends with ".css".
- *
- * Revision 1.38 2006/09/06 18:45:03 fabiankeil
- * Incorporate modified version of Roland Rosenfeld's patch to
- * optionally access the user-manual via Privoxy. Closes patch 679075.
- *
- * Formatting changed to Privoxy style, added call to
- * cgi_error_no_template if the requested file doesn't
- * exist and modified check whether or not Privoxy itself
- * should serve the manual. Should work cross-platform now.
- *
- * Revision 1.37 2006/07/18 14:48:45 david__schmidt
- * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
- * with what was really the latest development (the v_3_0_branch branch)
- *
- * Revision 1.35.2.7 2006/01/29 23:10:56 david__schmidt
- * Multiple filter file support
- *
- * Revision 1.35.2.6 2005/07/04 03:13:43 david__schmidt
- * Undo some damaging memory leak patches
- *
- * Revision 1.35.2.5 2005/05/07 21:50:55 david__schmidt
- * A few memory leaks plugged (mostly on error paths)
- *
- * Revision 1.35.2.4 2005/04/04 02:21:24 david__schmidt
- * Another instance of:
- * Don't show "Edit" buttons #ifndef FEATURE_CGI_EDIT_ACTIONS
- * Thanks to Magnus Holmgren for the patch
- *
- * Revision 1.35.2.3 2003/12/17 16:34:15 oes
- * - Prevent line wrap beween "View/Edit" link buttons on status page
- * - Some (mostly irrelevant) fixes for Out-of-mem-case handling
- *
- * Revision 1.35.2.2 2003/04/03 13:48:28 oes
- * Don't show "Edit" buttons #ifndef FEATURE_CGI_EDIT_ACTIONS
- *
- * Revision 1.35.2.1 2002/07/04 15:02:38 oes
- * Added ability to send redirects to send-banner CGI, so that it can completely mimic the image blocking action if called with type=auto
- *
- * Revision 1.35.2.1 2002/07/01 17:32:04 morcego
- * Applying patch from Andreas as provided by Hal on the list.
- * Message-ID: <20020701121218.V1606@feenix.burgiss.net>
- *
- * Revision 1.35 2002/05/12 21:44:44 jongfoster
- * Adding amiga.[ch] revision information, if on an amiga.
- *
- * Revision 1.34 2002/04/30 12:06:12 oes
- * Deleted unused code from default_cgi
- *
- * Revision 1.33 2002/04/30 11:14:52 oes
- * Made csp the first parameter in *action_to_html
- *
- * Revision 1.32 2002/04/26 18:29:13 jongfoster
- * Fixing this Visual C++ warning:
- * cgisimple.c(775) : warning C4018: '<' : signed/unsigned mismatch
- *
- * Revision 1.31 2002/04/26 12:54:36 oes
- * - Kill obsolete REDIRECT_URL code
- * - Error handling fixes
- * - Style sheet related HTML snipplet changes
- * - cgi_show_url_info:
- * - Matches now in table, actions on single lines,
- * linked to help
- * - standard.action suppressed
- * - Buttons to View and Edit AFs
- *
- * Revision 1.30 2002/04/24 02:18:08 oes
- * - show-status is now the starting point for editing
- * the actions files, generate list of all AFs with buttons
- * for viewing and editing, new look for file list (Jon:
- * buttons now aligned ;-P ), view mode now supports multiple
- * AFs, name changes, no view links for unspecified files,
- * no edit link for standard.action.
- *
- * - Jon's multiple AF patch: cgi_show_url_info now uses all
- * AFs and marks the output accordingly
- *
- * Revision 1.29 2002/04/10 13:38:35 oes
- * load_template signature changed
- *
- * Revision 1.28 2002/04/07 15:42:12 jongfoster
- * Fixing send-banner?type=auto when the image-blocker is
- * a redirect to send-banner
- *
- * Revision 1.27 2002/04/05 15:50:48 oes
- * added send-stylesheet CGI
- *
- * Revision 1.26 2002/04/04 00:36:36 gliptak
- * always use pcre for matching
- *
- * Revision 1.25 2002/04/03 22:28:03 gliptak
- * Removed references to gnu_regex
- *
- * Revision 1.24 2002/04/02 16:12:47 oes
- * Fix: moving misplaced lines into #ifdef FEATURE_FORCE
- *
- * Revision 1.23 2002/03/26 22:29:54 swa
- * we have a new homepage!
- *
- * Revision 1.22 2002/03/24 16:18:15 jongfoster
- * Removing old logo
- *
- * Revision 1.21 2002/03/24 15:23:33 jongfoster
- * Name changes
- *
- * Revision 1.20 2002/03/24 13:25:43 swa
- * name change related issues
- *
- * Revision 1.19 2002/03/16 23:54:06 jongfoster
- * Adding graceful termination feature, to help look for memory leaks.
- * If you enable this (which, by design, has to be done by hand
- * editing config.h) and then go to http://i.j.b/die, then the program
- * will exit cleanly after the *next* request. It should free all the
- * memory that was used.
- *
- * Revision 1.18 2002/03/12 01:44:49 oes
- * Changed default for "blocked" image from jb logo to checkboard pattern
- *
- * Revision 1.17 2002/03/08 16:43:18 oes
- * Added choice beween GIF and PNG built-in images
- *
- * Revision 1.16 2002/03/07 03:48:38 oes
- * - 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 1.15 2002/03/06 22:54:35 jongfoster
- * Automated function-comment nitpicking.
- *
- * Revision 1.14 2002/03/02 04:14:50 david__schmidt
- * Clean up a little CRLF unpleasantness that suddenly appeared
- *
- * Revision 1.13 2002/02/21 00:10:37 jongfoster
- * Adding send-banner?type=auto option
- *
- * Revision 1.12 2002/01/23 01:03:32 jongfoster
- * Fixing gcc [CygWin] compiler warnings
- *
- * Revision 1.11 2002/01/23 00:01:04 jongfoster
- * Adding cgi_transparent_gif() for http://i.j.b/t
- * Adding missing html_encode() to many CGI functions.
- * Adding urlmatch.[ch] to http://i.j.b/show-version
- *
- * Revision 1.10 2002/01/17 21:10:37 jongfoster
- * Changes to cgi_show_url_info to use new matching code from urlmatch.c.
- * Also fixing a problem in the same function with improperly quoted URLs
- * in output HTML, and adding code to handle https:// URLs correctly.
- *
- * Revision 1.9 2001/11/30 23:09:15 jongfoster
- * Now reports on FEATURE_CGI_EDIT_ACTIONS
- * Removing FEATURE_DENY_GZIP from template
- *
- * Revision 1.8 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 1.7 2001/10/23 21:48:19 jongfoster
- * Cleaning up error handling in CGI functions - they now send back
- * a HTML error page and should never cause a FATAL error. (Fixes one
- * potential source of "denial of service" attacks).
- *
- * CGI actions file editor that works and is actually useful.
- *
- * Ability to toggle JunkBuster remotely using a CGI call.
- *
- * You can turn off both the above features in the main configuration
- * file, e.g. if you are running a multi-user proxy.
- *
- * Revision 1.6 2001/10/14 22:00:32 jongfoster
- * Adding support for a 404 error when an invalid CGI page is requested.
- *
- * Revision 1.5 2001/10/07 15:30:41 oes
- * Removed FEATURE_DENY_GZIP
- *
- * Revision 1.4 2001/10/02 15:31:12 oes
- * Introduced show-request cgi
- *
- * Revision 1.3 2001/09/22 16:34:44 jongfoster
- * Removing unneeded #includes
- *
- * Revision 1.2 2001/09/19 18:01:11 oes
- * Fixed comments; cosmetics
- *
- * Revision 1.1 2001/09/16 17:08:54 jongfoster
- * Moving simple CGI functions from cgi.c to new file cgisimple.c
- *
- *