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- /* ====================================================================
- * Copyright (c) 1995-1999 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. For written permission, please contact
- * apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache"
- * nor may "Apache" appear in their names without prior written
- * permission of the Apache Group.
- *
- * 6. 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
- * ITS 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/>.
- *
- */
-
- /*
- * http_mime.c: Sends/gets MIME headers for requests
- *
- * Rob McCool
- *
- */
-
- #define MIME_PRIVATE
-
- #include "httpd.h"
- #include "http_config.h"
- #include "http_log.h"
-
- typedef struct handlers_info {
- char *name;
- } handlers_info;
-
- typedef struct {
- table *forced_types; /* Additional AddTyped stuff */
- table *encoding_types; /* Added with AddEncoding... */
- table *language_types; /* Added with AddLanguage... */
- table *handlers; /* Added with AddHandler... */
- array_header *handlers_remove; /* List of handlers to remove */
-
- char *type; /* Type forced with ForceType */
- char *handler; /* Handler forced with SetHandler */
- char *default_language; /* Language if no AddLanguage ext found */
- } mime_dir_config;
-
- module MODULE_VAR_EXPORT mime_module;
-
- static void *create_mime_dir_config(pool *p, char *dummy)
- {
- mime_dir_config *new =
- (mime_dir_config *) ap_palloc(p, sizeof(mime_dir_config));
-
- new->forced_types = ap_make_table(p, 4);
- new->encoding_types = ap_make_table(p, 4);
- new->language_types = ap_make_table(p, 4);
- new->handlers = ap_make_table(p, 4);
- new->handlers_remove = ap_make_array(p, 4, sizeof(handlers_info));
-
- new->type = NULL;
- new->handler = NULL;
- new->default_language = NULL;
-
- return new;
- }
-
- static void *merge_mime_dir_configs(pool *p, void *basev, void *addv)
- {
- mime_dir_config *base = (mime_dir_config *) basev;
- mime_dir_config *add = (mime_dir_config *) addv;
- mime_dir_config *new =
- (mime_dir_config *) ap_palloc(p, sizeof(mime_dir_config));
- int i;
- handlers_info *hand;
-
- hand = (handlers_info *) add->handlers_remove->elts;
- for (i = 0; i < add->handlers_remove->nelts; i++) {
- ap_table_unset(base->handlers, hand[i].name);
- }
-
- new->forced_types = ap_overlay_tables(p, add->forced_types,
- base->forced_types);
- new->encoding_types = ap_overlay_tables(p, add->encoding_types,
- base->encoding_types);
- new->language_types = ap_overlay_tables(p, add->language_types,
- base->language_types);
- new->handlers = ap_overlay_tables(p, add->handlers,
- base->handlers);
-
- new->type = add->type ? add->type : base->type;
- new->handler = add->handler ? add->handler : base->handler;
- new->default_language = add->default_language ?
- add->default_language : base->default_language;
-
- return new;
- }
-
- static const char *add_type(cmd_parms *cmd, mime_dir_config * m, char *ct,
- char *ext)
- {
- if (*ext == '.')
- ++ext;
- ap_str_tolower(ct);
- ap_table_setn(m->forced_types, ext, ct);
- return NULL;
- }
-
- static const char *add_encoding(cmd_parms *cmd, mime_dir_config * m, char *enc,
- char *ext)
- {
- if (*ext == '.')
- ++ext;
- ap_str_tolower(enc);
- ap_table_setn(m->encoding_types, ext, enc);
- return NULL;
- }
-
- static const char *add_language(cmd_parms *cmd, mime_dir_config * m, char *lang,
- char *ext)
- {
- if (*ext == '.')
- ++ext;
- ap_str_tolower(lang);
- ap_table_setn(m->language_types, ext, lang);
- return NULL;
- }
-
- static const char *add_handler(cmd_parms *cmd, mime_dir_config * m, char *hdlr,
- char *ext)
- {
- if (*ext == '.')
- ++ext;
- ap_str_tolower(hdlr);
- ap_table_setn(m->handlers, ext, hdlr);
- return NULL;
- }
-
- /*
- * Note handler names that should be un-added for this location. This
- * will keep the association from being inherited, as well, but not
- * from being re-added at a subordinate level.
- */
- static const char *remove_handler(cmd_parms *cmd, void *m, char *ext)
- {
- mime_dir_config *mcfg = (mime_dir_config *) m;
- handlers_info *hand;
-
- if (*ext == '.') {
- ++ext;
- }
- hand = (handlers_info *) ap_push_array(mcfg->handlers_remove);
- hand->name = ap_pstrdup(cmd->pool, ext);
- return NULL;
- }
-
- /* The sole bit of server configuration that the MIME module has is
- * the name of its config file, so...
- */
-
- static const char *set_types_config(cmd_parms *cmd, void *dummy, char *arg)
- {
- ap_set_module_config(cmd->server->module_config, &mime_module, arg);
- return NULL;
- }
-
- static const command_rec mime_cmds[] =
- {
- {"AddType", add_type, NULL, OR_FILEINFO, ITERATE2,
- "a mime type followed by one or more file extensions"},
- {"AddEncoding", add_encoding, NULL, OR_FILEINFO, ITERATE2,
- "an encoding (e.g., gzip), followed by one or more file extensions"},
- {"AddLanguage", add_language, NULL, OR_FILEINFO, ITERATE2,
- "a language (e.g., fr), followed by one or more file extensions"},
- {"AddHandler", add_handler, NULL, OR_FILEINFO, ITERATE2,
- "a handler name followed by one or more file extensions"},
- {"ForceType", ap_set_string_slot_lower,
- (void *)XtOffsetOf(mime_dir_config, type), OR_FILEINFO, TAKE1,
- "a media type"},
- {"RemoveHandler", remove_handler, NULL, OR_FILEINFO, ITERATE,
- "one or more file extensions"},
- {"SetHandler", ap_set_string_slot_lower,
- (void *)XtOffsetOf(mime_dir_config, handler), OR_FILEINFO, TAKE1,
- "a handler name"},
- {"TypesConfig", set_types_config, NULL, RSRC_CONF, TAKE1,
- "the MIME types config file"},
- {"DefaultLanguage", ap_set_string_slot,
- (void*)XtOffsetOf(mime_dir_config, default_language), OR_FILEINFO, TAKE1,
- "language to use for documents with no other language file extension" },
- {NULL}
- };
-
- /* Hash table --- only one of these per daemon; virtual hosts can
- * get private versions through AddType...
- */
-
- /* MIME_HASHSIZE used to be 27 (26 chars and one "non-alpha" slot), but
- * with character sets like EBCDIC, this is insufficient because the
- * range 'a'...'z' is not contigous. Defining it as ('z'-'a'+2) is
- * equivalent to 27 in ASCII, and makes it work in EBCDIC.
- */
- #define MIME_HASHSIZE ('z'-'a'+2)
- #define hash(i) (ap_isalpha(i) ? (ap_tolower(i)) - 'a' : (MIME_HASHSIZE-1))
-
- static table *hash_buckets[MIME_HASHSIZE];
-
- static void init_mime(server_rec *s, pool *p)
- {
- configfile_t *f;
- char l[MAX_STRING_LEN];
- int x;
- char *types_confname = ap_get_module_config(s->module_config, &mime_module);
-
- if (!types_confname)
- types_confname = TYPES_CONFIG_FILE;
-
- types_confname = ap_server_root_relative(p, types_confname);
-
- if (!(f = ap_pcfg_openfile(p, types_confname))) {
- ap_log_error(APLOG_MARK, APLOG_ERR, s,
- "could not open mime types log file %s.", types_confname);
- exit(1);
- }
-
- for (x = 0; x < MIME_HASHSIZE; x++)
- hash_buckets[x] = ap_make_table(p, 10);
-
- while (!(ap_cfg_getline(l, MAX_STRING_LEN, f))) {
- const char *ll = l, *ct;
-
- if (l[0] == '#')
- continue;
- ct = ap_getword_conf(p, &ll);
-
- while (ll[0]) {
- char *ext = ap_getword_conf(p, &ll);
- ap_str_tolower(ext); /* ??? */
- ap_table_setn(hash_buckets[hash(ext[0])], ext, ct);
- }
- }
- ap_cfg_closefile(f);
- }
-
- static int find_ct(request_rec *r)
- {
- const char *fn = strrchr(r->filename, '/');
- mime_dir_config *conf =
- (mime_dir_config *) ap_get_module_config(r->per_dir_config, &mime_module);
- char *ext;
- const char *orighandler = r->handler;
- const char *type;
-
- if (S_ISDIR(r->finfo.st_mode)) {
- r->content_type = DIR_MAGIC_TYPE;
- return OK;
- }
-
- /* TM -- FIXME
- * if r->filename does not contain a '/', the following passes a null
- * pointer to getword, causing a SEGV ..
- */
-
- if (fn == NULL)
- fn = r->filename;
-
- /* Parse filename extensions, which can be in any order */
- while ((ext = ap_getword(r->pool, &fn, '.')) && *ext) {
- int found = 0;
-
- /* Check for Content-Type */
- if ((type = ap_table_get(conf->forced_types, ext))
- || (type = ap_table_get(hash_buckets[hash(*ext)], ext))) {
- r->content_type = type;
- found = 1;
- }
-
- /* Check for Content-Language */
- if ((type = ap_table_get(conf->language_types, ext))) {
- const char **new;
-
- r->content_language = type; /* back compat. only */
- if (!r->content_languages)
- r->content_languages = ap_make_array(r->pool, 2, sizeof(char *));
- new = (const char **) ap_push_array(r->content_languages);
- *new = type;
- found = 1;
- }
-
- /* Check for Content-Encoding */
- if ((type = ap_table_get(conf->encoding_types, ext))) {
- if (!r->content_encoding)
- r->content_encoding = type;
- else
- r->content_encoding = ap_pstrcat(r->pool, r->content_encoding,
- ", ", type, NULL);
- found = 1;
- }
-
- /* Check for a special handler, but not for proxy request */
- if ((type = ap_table_get(conf->handlers, ext)) && !r->proxyreq) {
- r->handler = type;
- found = 1;
- }
-
- /* This is to deal with cases such as foo.gif.bak, which we want
- * to not have a type. So if we find an unknown extension, we
- * zap the type/language/encoding and reset the handler
- */
-
- if (!found) {
- r->content_type = NULL;
- r->content_language = NULL;
- r->content_languages = NULL;
- r->content_encoding = NULL;
- r->handler = orighandler;
- }
-
- }
-
- /* Set default language, if none was specified by the extensions
- * and we have a DefaultLanguage setting in force
- */
-
- if (!r->content_languages && conf->default_language) {
- const char **new;
-
- r->content_language = conf->default_language; /* back compat. only */
- if (!r->content_languages)
- r->content_languages = ap_make_array(r->pool, 2, sizeof(char *));
- new = (const char **) ap_push_array(r->content_languages);
- *new = conf->default_language;
- }
-
- /* Check for overrides with ForceType/SetHandler */
-
- if (conf->type && strcmp(conf->type, "none"))
- r->content_type = conf->type;
- if (conf->handler && strcmp(conf->handler, "none"))
- r->handler = conf->handler;
-
- if (!r->content_type)
- return DECLINED;
-
- return OK;
- }
-
- module MODULE_VAR_EXPORT mime_module =
- {
- STANDARD_MODULE_STUFF,
- init_mime, /* initializer */
- create_mime_dir_config, /* dir config creator */
- merge_mime_dir_configs, /* dir config merger */
- NULL, /* server config */
- NULL, /* merge server config */
- mime_cmds, /* command table */
- NULL, /* handlers */
- NULL, /* filename translation */
- NULL, /* check_user_id */
- NULL, /* check auth */
- NULL, /* check access */
- find_ct, /* type_checker */
- NULL, /* fixups */
- NULL, /* logger */
- NULL, /* header parser */
- NULL, /* child_init */
- NULL, /* child_exit */
- NULL /* post read-request */
- };
-