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cgi.h

Go to the documentation of this file.

#ifndef CGI_H_INCLUDED
#define CGI_H_INCLUDED
#define CGI_H_VERSION "$Id: cgi.h,v 2.0 2002/06/04 14:34:21 jongfoster Exp $"
/* ******************************************************************
 * $Source: /cvsroot/ijbswa/current/src/cgi.h,v $
 * ******************************************************************
 *
 * Written by and Copyright (C) 2001 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.
 * 
 * *****************************************************************/
/**
 * @file
 *
 * Declares functions to intercept request, generate
 * html or gif answers, and to compose HTTP resonses.
 * 
 * Functions declared include:
 * 
 * 
 *
 * $Log: cgi.h,v $
 * Revision 2.0  2002/06/04 14:34:21  jongfoster
 * Moving source files to src/
 * 
 * Revision 1.29  2002/05/19 11:33:21  jongfoster
 * If a CGI error was not handled, and propogated back to
 * dispatch_known_cgi(), then it was assumed to be "out of memory".
 * This gave a very misleading error message.
 * 
 * Now other errors will cause a simple message giving the error
 * number and asking the user to report a bug.
 * 
 * Bug report:
 * http://sourceforge.net/tracker/index.php?func=detail
 * &aid=557905&group_id=11118&atid=111118
 * 
 * Revision 1.28  2002/04/26 12:54:03  oes
 * New function add_help_link
 * 
 * Revision 1.27  2002/04/24 02:16:51  oes
 * Moved get_char_param, get_string_param and get_number_param here from cgiedit.c
 * 
 * Revision 1.26  2002/04/10 13:38:35  oes
 * load_template signature changed
 * 
 * Revision 1.25  2002/04/08 20:50:25  swa
 * fixed JB spelling
 * 
 * Revision 1.24  2002/03/26 22:29:54  swa
 * we have a new homepage!
 * 
 * Revision 1.23  2002/03/24 16:18:15  jongfoster
 * Removing old logo
 * 
 * Revision 1.22  2002/03/24 13:25:43  swa
 * name change related issues
 * 
 * Revision 1.21  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 1.20  2002/03/04 17:53:22  oes
 * Fixed compiled warning
 * 
 * Revision 1.19  2002/01/21 00:33:52  jongfoster
 * Adding map_block_keep() to save a few bytes in the edit-actions-list HTML.
 * 
 * Revision 1.18  2001/11/16 00:46:31  jongfoster
 * Fixing compiler warnings
 * 
 * Revision 1.17  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 1.16  2001/09/16 17:08:54  jongfoster
 * Moving simple CGI functions from cgi.c to new file cgisimple.c
 * 
 * Revision 1.15  2001/09/16 15:02:35  jongfoster
 * Adding i.j.b/robots.txt.
 * Inlining add_stats() since it's only ever called from one place.
 * 
 * Revision 1.14  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 1.13  2001/09/16 11:00:10  jongfoster
 * New function alloc_http_response, for symmetry with free_http_response
 * 
 * Revision 1.12  2001/09/13 23:31:25  jongfoster
 * Moving image data to cgi.c rather than cgi.h.
 * 
 * Revision 1.11  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 1.10  2001/08/01 21:19:22  jongfoster
 * Moving file version information to a separate CGI page.
 * 
 * Revision 1.9  2001/08/01 00:17:54  jongfoster
 * Adding prototype for map_conditional
 * 
 * Revision 1.8  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 1.7  2001/07/29 18:43:08  jongfoster
 * Changing #ifdef _FILENAME_H to FILENAME_H_INCLUDED, to conform to
 * ANSI C rules.
 * 
 * Revision 1.6  2001/06/29 21:45:41  oes
 * Indentation, CRLF->LF, Tab-> Space
 * 
 * Revision 1.5  2001/06/29 13:22:44  oes
 * - Cleaned up
 * - Added new functions: default_exports(), make_menu(),
 *   error_response() etc, ranamed others and changed
 *   param and return types.
 * - Removed HTTP/HTML snipplets
 * - Removed logentry from cancelled commit
 * 
 * Revision 1.4  2001/06/09 10:50:58  jongfoster
 * Changing "show URL info" handler to new style.
 * Adding "extern" to some function prototypes.
 * 
 * Revision 1.3  2001/06/03 19:12:16  oes
 * introduced new cgi handling
 * 
 * No revisions before 1.3
 * 
 */
/* *****************************************************************/


#include "project.h"

#ifdef __cplusplus
extern "C" {
#endif

/*
 * Main dispatch function
 */
extern struct http_response *dispatch_cgi(struct client_state *csp);

/* Not exactly a CGI */
extern struct http_response * error_response(struct client_state *csp,
                                             const char *templatename,
                                             int err);

/*
 * CGI support functions
 */
extern struct http_response * alloc_http_response(void);
extern void free_http_response(struct http_response *rsp);

extern struct http_response *finish_http_response(struct http_response *rsp);

extern struct map * default_exports(const struct client_state *csp, const char *caller);

extern jb_err map_block_killer (struct map *exports, const char *name);
extern jb_err map_block_keep   (struct map *exports, const char *name);
extern jb_err map_conditional  (struct map *exports, const char *name, int choose_first);

extern jb_err template_load(struct client_state *csp, char ** template_ptr, 
                            const char *templatename, int recursive);
extern jb_err template_fill(char ** template_ptr, const struct map *exports);
extern jb_err template_fill_for_cgi(struct client_state *csp,
                                    const char *templatename,
                                    struct map *exports,
                                    struct http_response *rsp);

extern void cgi_init_error_messages(void);
extern struct http_response *cgi_error_memory(void);
extern jb_err cgi_error_no_template(struct client_state *csp,
                                    struct http_response *rsp,
                                    const char *template_name);
extern jb_err cgi_error_bad_param(struct client_state *csp,
                                  struct http_response *rsp);
jb_err cgi_error_unknown(struct client_state *csp,
                         struct http_response *rsp,
                         jb_err error_to_report);

extern jb_err get_number_param(struct client_state *csp,
                               const struct map *parameters,
                               char *name,
                               unsigned *pvalue);
extern jb_err get_string_param(const struct map *parameters,
                               const char *param_name,
                               const char **pparam);
extern char   get_char_param(const struct map *parameters,
                             const char *param_name);

/*
 * Text generators
 */
extern void get_http_time(int time_offset, char * buf);
extern char *add_help_link(const char *item, struct configuration_spec *config);
extern char *make_menu(const char *self);
extern char *dump_map(const struct map *the_map);

/*
 * Ad replacement images
 */
extern const char image_pattern_data[];
extern const size_t  image_pattern_length;
extern const char image_blank_data[];
extern const size_t  image_blank_length;

/* Revision control strings from this header and associated .c file */

/** Version information about cgi.c. */
extern const char cgi_rcs[];

/** Version information about cgi.h. */
extern const char cgi_h_rcs[];

#ifdef __cplusplus
} /* extern "C" */
#endif

#endif /* ndef CGI_H_INCLUDED */

/*
  Local Variables:
  tab-width: 3
  end:
*/

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