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- /* ====================================================================
- * Copyright (c) 1995 The Apache Group. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * 4. The names "Apache Server" and "Apache Group" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission.
- *
- * 5. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
- * IT'S CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Group and was originally based
- * on public domain software written at the National Center for
- * Supercomputing Applications, University of Illinois, Urbana-Champaign.
- * For more information on the Apache Group and the Apache HTTP server
- * project, please see <http://www.apache.org/>.
- *
- */
-
- /*
- * mod_cern_meta.c
- * version 0.0.5
- * status beta
- *
- * Andrew Wilson <Andrew.Wilson@cm.cf.ac.uk> 25.Jan.96
- *
- * Emulate the CERN HTTPD Meta file semantics. Meta files are HTTP
- * headers that can be output in addition to the normal range of
- * headers for each file accessed. They appear rather like the Apache
- * .asis files, and are able to provide a crude way of influencing
- * the Expires: header, as well as providing other curiosities.
- * There are many ways to manage meta information, this one was
- * chosen because there is already a large number of CERN users
- * who can exploit this module. It should be noted that there are probably
- * more sensitive ways of managing the Expires: header specifically.
- *
- * The module obeys the following directives, which can only appear
- * in the server's .conf files and not in any .htaccess file.
- *
- * MetaDir <directory name>
- *
- * specifies the name of the directory in which Apache can find
- * meta information files. The directory is usually a 'hidden'
- * subdirectory of the directory that contains the file being
- * accessed. eg:
- *
- * # .meta files are in the *same* directory as the
- * # file being accessed
- * MetaDir .
- *
- * the default is to look in a '.web' subdirectory. This is the
- * same as for CERN 3.+ webservers and behaviour is the same as
- * for the directive:
- *
- * MetaDir .web
- *
- * MetaSuffix <meta file suffix>
- *
- * specifies the file name suffix for the file containing the
- * meta information. eg:
- *
- * # our meta files are suffixed with '.cern_meta'
- * MetaSuffix .cern_meta
- *
- * the default is to look for files with the suffix '.meta'. This
- * behaviour is the same as for the directive:
- *
- * MetaSuffix .meta
- *
- * When accessing the file
- *
- * DOCUMENT_ROOT/somedir/index.html
- *
- * this module will look for the file
- *
- * DOCUMENT_ROOT/somedir/.web/index.html.meta
- *
- * and will use its contents to generate additional MIME header
- * information.
- *
- * For more information on the CERN Meta file semantics see:
- *
- * http://www.w3.org/hypertext/WWW/Daemon/User/Config/General.html#MetaDir
- *
- * Change-log:
- * 29.Jan.96 pfopen/pfclose instead of fopen/fclose
- * DECLINE when real file not found, we may be checking each
- * of the index.html/index.shtml/index.htm variants and don't
- * need to report missing ones as spurious errors.
- * 31.Jan.96 log_error reports about a malformed .meta file, rather
- * than a script error.
- *
- */
-
- #include "httpd.h"
- #include "http_config.h"
- #include <sys/types.h>
- #include <sys/stat.h>
- #include "util_script.h"
- #include "http_log.h"
-
- #define DEFAULT_METADIR ".web"
- #define DEFAULT_METASUFFIX ".meta"
-
- module cern_meta_module;
-
- typedef struct {
- char *metadir;
- char *metasuffix;
- } cern_meta_config;
-
- void *create_cern_meta_config (pool *p, server_rec *dummy)
- {
- cern_meta_config *new =
- (cern_meta_config *) palloc (p, sizeof(cern_meta_config));
-
- new->metadir = DEFAULT_METADIR;
- new->metasuffix = DEFAULT_METASUFFIX;
-
- return new;
- }
-
- char *set_metadir (cmd_parms *parms, void *dummy, char *arg)
- {
- cern_meta_config *cmc ;
-
- cmc = get_module_config (parms->server->module_config,
- &cern_meta_module);
- cmc->metadir = arg;
- return NULL;
- }
-
- char *set_metasuffix (cmd_parms *parms, void *dummy, char *arg)
- {
- cern_meta_config *cmc ;
-
- cmc = get_module_config (parms->server->module_config,
- &cern_meta_module);
- cmc->metasuffix = arg;
- return NULL;
- }
-
- command_rec cern_meta_cmds[] = {
- { "MetaDir", set_metadir, NULL, RSRC_CONF, TAKE1,
- "the name of the directory containing meta files"},
- { "MetaSuffix", set_metasuffix, NULL, RSRC_CONF, TAKE1,
- "the filename suffix for meta files"},
- { NULL }
- };
-
- int scan_meta_file(request_rec *r, FILE *f)
- {
- char w[MAX_STRING_LEN];
- char *l;
- int p;
-
- while( fgets(w, MAX_STRING_LEN-1, f) != NULL ) {
-
- /* Delete terminal (CR?)LF */
-
- p = strlen(w);
- if (p > 0 && w[p-1] == '\n')
- {
- if (p > 1 && w[p-2] == '\015') w[p-2] = '\0';
- else w[p-1] = '\0';
- }
-
- if(w[0] == '\0') {
- return OK;
- }
-
- /* if we see a bogus header don't ignore it. Shout and scream */
-
- if(!(l = strchr(w,':'))) {
- log_reason ("malformed header in meta file", r->filename, r);
- return SERVER_ERROR;
- }
-
- *l++ = '\0';
- while (*l && isspace (*l)) ++l;
-
- if(!strcasecmp(w,"Content-type")) {
-
- /* Nuke trailing whitespace */
-
- char *endp = l + strlen(l) - 1;
- while (endp > l && isspace(*endp)) *endp-- = '\0';
-
- r->content_type = pstrdup (r->pool, l);
- }
- else if(!strcasecmp(w,"Status")) {
- sscanf(l, "%d", &r->status);
- r->status_line = pstrdup(r->pool, l);
- }
- else {
- table_set (r->headers_out, w, l);
- }
- }
- return OK;
- }
-
- int add_cern_meta_data(request_rec *r)
- {
- char *metafilename;
- char *last_slash;
- char *real_file;
- char *scrap_book;
- struct stat meta_stat;
- FILE *f;
- cern_meta_config *cmc ;
- int rv;
-
- cmc = get_module_config (r->server->module_config,
- &cern_meta_module);
-
- /* if ./.web/$1.meta exists then output 'asis' */
-
- if (r->finfo.st_mode == 0) {
- return DECLINED;
- };
-
- /* does uri end in a trailing slash? */
- if ( r->uri[strlen(r->uri) - 1] == '/' ) {
- return DECLINED;
- };
-
- /* what directory is this file in? */
- scrap_book = pstrdup( r->pool, r->filename );
- /* skip leading slash, recovered in later processing */
- scrap_book++;
- last_slash = strrchr( scrap_book, '/' );
- if ( last_slash != NULL ) {
- /* skip over last slash */
- real_file = last_slash;
- real_file++;
- *last_slash = '\0';
- } else {
- /* no last slash, buh?! */
- log_reason("internal error in mod_cern_meta", r->filename, r);
- /* should really barf, but hey, let's be friends... */
- return DECLINED;
- };
-
- metafilename = pstrcat(r->pool, "/", scrap_book, "/", cmc->metadir, "/", real_file, cmc->metasuffix, NULL);
-
- /*
- * stat can legitimately fail for a bewildering number of reasons,
- * only one of which implies the file isn't there. A hardened
- * version of this module should test for all conditions, but later...
- */
- if (stat(metafilename, &meta_stat) == -1) {
- /* stat failed, possibly file missing */
- return DECLINED;
- };
-
- /*
- * this check is to be found in other Jan/96 Apache code, I've
- * not been able to find any corroboration in the man pages but
- * I've been wrong before so I'll put it in anyway. Never
- * admit to being clueless...
- */
- if ( meta_stat.st_mode == 0 ) {
- /* stat failed, definately file missing */
- return DECLINED;
- };
-
- f = pfopen (r->pool, metafilename, "r");
-
- if (f == NULL) {
- log_reason("meta file permissions deny server access", metafilename, r);
- return FORBIDDEN;
- };
-
- /* read the headers in */
- rv = scan_meta_file(r, f);
- pfclose( r->pool, f );
-
- return rv;
- }
-
- module cern_meta_module = {
- STANDARD_MODULE_STUFF,
- NULL, /* initializer */
- NULL, /* dir config creater */
- NULL, /* dir merger --- default is to override */
- create_cern_meta_config, /* server config */
- NULL, /* merge server configs */
- cern_meta_cmds, /* command table */
- NULL, /* handlers */
- NULL, /* filename translation */
- NULL, /* check_user_id */
- NULL, /* check auth */
- NULL, /* check access */
- NULL, /* type_checker */
- add_cern_meta_data, /* fixups */
- NULL, /* logger */
- };
-