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apache-httpd/modules/http/mod_mime.c

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/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* http_mime.c: Sends/gets MIME headers for requests
*
* Rob McCool
*
*/
#include "apr.h"
#include "apr_strings.h"
#include "apr_lib.h"
#include "apr_hash.h"
#define APR_WANT_STRFUNC
#include "apr_want.h"
#include "ap_config.h"
#include "httpd.h"
#include "http_config.h"
#include "http_log.h"
#include "http_request.h"
#include "http_protocol.h"
/* XXXX - fix me / EBCDIC
* there was a cludge here which would use its
* own version apr_isascii(). Indicating that
* on some platforms that might be needed.
*
* #define OS_ASC(c) (c) -- for mere mortals
* or
* #define OS_ASC(c) (ebcdic2ascii[c]) -- for dino's
*
* #define apr_isascii(c) ((OS_ASC(c) & 0x80) == 0)
*/
/* XXXXX - fix me - See note with NOT_PROXY
*/
typedef struct attrib_info {
char *name;
int offset;
} attrib_info;
/* Information to which an extension can be mapped
*/
typedef struct extension_info {
char *forced_type; /* Additional AddTyped stuff */
char *encoding_type; /* Added with AddEncoding... */
char *language_type; /* Added with AddLanguage... */
char *handler; /* Added with AddHandler... */
char *charset_type; /* Added with AddCharset... */
char *input_filters; /* Added with AddInputFilter... */
char *output_filters; /* Added with AddOutputFilter... */
} extension_info;
#define MULTIMATCH_UNSET 0
#define MULTIMATCH_ANY 1
#define MULTIMATCH_NEGOTIATED 2
#define MULTIMATCH_HANDLERS 4
#define MULTIMATCH_FILTERS 8
typedef struct {
apr_hash_t *extension_mappings; /* Map from extension name to
* extension_info structure */
apr_array_header_t *remove_mappings; /* A simple list, walked once */
char *default_language; /* Language if no AddLanguage ext found */
int multimatch; /* Extensions to include in multiview matching
* for filenames, e.g. Filters and Handlers
*/
int use_path_info; /* If set to 0, only use filename.
* If set to 1, append PATH_INFO to filename for
* lookups.
* If set to 2, this value is unset and is
* effectively 0.
*/
} mime_dir_config;
typedef struct param_s {
char *attr;
char *val;
struct param_s *next;
} param;
typedef struct {
const char *type;
apr_size_t type_len;
const char *subtype;
apr_size_t subtype_len;
param *param;
} content_type;
static char tspecial[] = {
'(', ')', '<', '>', '@', ',', ';', ':',
'\\', '"', '/', '[', ']', '?', '=',
'\0'
};
module AP_MODULE_DECLARE_DATA mime_module;
static void *create_mime_dir_config(apr_pool_t *p, char *dummy)
{
mime_dir_config *new = apr_palloc(p, sizeof(mime_dir_config));
new->extension_mappings = NULL;
new->remove_mappings = NULL;
new->default_language = NULL;
new->multimatch = MULTIMATCH_UNSET;
new->use_path_info = 2;
return new;
}
/*
* Overlay one hash table of extension_mappings onto another
*/
static void *overlay_extension_mappings(apr_pool_t *p,
const void *key,
apr_ssize_t klen,
const void *overlay_val,
const void *base_val,
const void *data)
{
const extension_info *overlay_info = (const extension_info *)overlay_val;
const extension_info *base_info = (const extension_info *)base_val;
extension_info *new_info = apr_pmemdup(p, base_info, sizeof(extension_info));
if (overlay_info->forced_type) {
new_info->forced_type = overlay_info->forced_type;
}
if (overlay_info->encoding_type) {
new_info->encoding_type = overlay_info->encoding_type;
}
if (overlay_info->language_type) {
new_info->language_type = overlay_info->language_type;
}
if (overlay_info->handler) {
new_info->handler = overlay_info->handler;
}
if (overlay_info->charset_type) {
new_info->charset_type = overlay_info->charset_type;
}
if (overlay_info->input_filters) {
new_info->input_filters = overlay_info->input_filters;
}
if (overlay_info->output_filters) {
new_info->output_filters = overlay_info->output_filters;
}
return new_info;
}
/* Member is the offset within an extension_info of the pointer to reset
*/
static void remove_items(apr_pool_t *p, apr_array_header_t *remove,
apr_hash_t *mappings)
{
attrib_info *suffix = (attrib_info *) remove->elts;
int i;
for (i = 0; i < remove->nelts; i++) {
extension_info *exinfo = apr_hash_get(mappings,
suffix[i].name,
APR_HASH_KEY_STRING);
if (exinfo && *(const char**)((char *)exinfo + suffix[i].offset)) {
extension_info *copyinfo = exinfo;
exinfo = apr_pmemdup(p, copyinfo, sizeof(*exinfo));
apr_hash_set(mappings, suffix[i].name,
APR_HASH_KEY_STRING, exinfo);
*(const char**)((char *)exinfo + suffix[i].offset) = NULL;
}
}
}
static void *merge_mime_dir_configs(apr_pool_t *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 = apr_palloc(p, sizeof(mime_dir_config));
if (base->extension_mappings && add->extension_mappings) {
new->extension_mappings = apr_hash_merge(p, add->extension_mappings,
base->extension_mappings,
overlay_extension_mappings,
NULL);
}
else {
if (base->extension_mappings == NULL) {
new->extension_mappings = add->extension_mappings;
}
else {
new->extension_mappings = base->extension_mappings;
}
/* We may not be merging the tables, but if we potentially will change
* an exinfo member, then we are about to trounce it anyways.
* We must have a copy for safety.
*/
if (new->extension_mappings && add->remove_mappings) {
new->extension_mappings =
apr_hash_copy(p, new->extension_mappings);
}
}
if (new->extension_mappings) {
if (add->remove_mappings)
remove_items(p, add->remove_mappings, new->extension_mappings);
}
new->remove_mappings = NULL;
new->default_language = add->default_language ?
add->default_language : base->default_language;
new->multimatch = (add->multimatch != MULTIMATCH_UNSET) ?
add->multimatch : base->multimatch;
if ((add->use_path_info & 2) == 0) {
new->use_path_info = add->use_path_info;
}
else {
new->use_path_info = base->use_path_info;
}
return new;
}
static const char *add_extension_info(cmd_parms *cmd, void *m_,
const char *value_, const char* ext)
{
mime_dir_config *m=m_;
extension_info *exinfo;
int offset = (int) (long) cmd->info;
char *key = apr_pstrdup(cmd->temp_pool, ext);
char *value = apr_pstrdup(cmd->pool, value_);
ap_str_tolower(value);
ap_str_tolower(key);
if (*key == '.') {
++key;
}
if (!m->extension_mappings) {
m->extension_mappings = apr_hash_make(cmd->pool);
exinfo = NULL;
}
else {
exinfo = (extension_info*)apr_hash_get(m->extension_mappings, key,
APR_HASH_KEY_STRING);
}
if (!exinfo) {
exinfo = apr_pcalloc(cmd->pool, sizeof(extension_info));
key = apr_pstrdup(cmd->pool, key);
apr_hash_set(m->extension_mappings, key, APR_HASH_KEY_STRING, exinfo);
}
*(const char**)((char *)exinfo + offset) = value;
return NULL;
}
/*
* As RemoveType should also override the info from TypesConfig, we add an
* empty string as type instead of actually removing the type.
*/
static const char *remove_extension_type(cmd_parms *cmd, void *m_,
const char *ext)
{
return add_extension_info(cmd, m_, "", ext);
}
/*
* Note handler names are un-added with each per_dir_config merge.
* This keeps the association from being inherited, but not
* from being re-added at a subordinate level.
*/
static const char *remove_extension_info(cmd_parms *cmd, void *m_,
const char *ext)
{
mime_dir_config *m = (mime_dir_config *) m_;
attrib_info *suffix;
if (*ext == '.') {
++ext;
}
if (!m->remove_mappings) {
m->remove_mappings = apr_array_make(cmd->pool, 4, sizeof(*suffix));
}
suffix = (attrib_info *)apr_array_push(m->remove_mappings);
suffix->name = apr_pstrdup(cmd->pool, ext);
ap_str_tolower(suffix->name);
suffix->offset = (int) (long) cmd->info;
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,
const char *arg)
{
ap_set_module_config(cmd->server->module_config, &mime_module,
(void *)arg);
return NULL;
}
static const char *multiviews_match(cmd_parms *cmd, void *m_,
const char *include)
{
mime_dir_config *m = (mime_dir_config *) m_;
const char *errmsg;
errmsg = ap_check_cmd_context(cmd, NOT_IN_LOCATION);
if (errmsg != NULL) {
return errmsg;
}
if (strcasecmp(include, "Any") == 0) {
if (m->multimatch && (m->multimatch & ~MULTIMATCH_ANY)) {
return "Any is incompatible with NegotiatedOnly, "
"Filters and Handlers";
}
m->multimatch |= MULTIMATCH_ANY;
}
else if (strcasecmp(include, "NegotiatedOnly") == 0) {
if (m->multimatch && (m->multimatch & ~MULTIMATCH_NEGOTIATED)) {
return "NegotiatedOnly is incompatible with Any, "
"Filters and Handlers";
}
m->multimatch |= MULTIMATCH_NEGOTIATED;
}
else if (strcasecmp(include, "Filters") == 0) {
if (m->multimatch && (m->multimatch & (MULTIMATCH_NEGOTIATED
| MULTIMATCH_ANY))) {
return "Filters is incompatible with Any and NegotiatedOnly";
}
m->multimatch |= MULTIMATCH_FILTERS;
}
else if (strcasecmp(include, "Handlers") == 0) {
if (m->multimatch && (m->multimatch & (MULTIMATCH_NEGOTIATED
| MULTIMATCH_ANY))) {
return "Handlers is incompatible with Any and NegotiatedOnly";
}
m->multimatch |= MULTIMATCH_HANDLERS;
}
else {
return apr_psprintf(cmd->pool, "Unrecognized option '%s'", include);
}
return NULL;
}
static const command_rec mime_cmds[] =
{
AP_INIT_ITERATE2("AddCharset", add_extension_info,
(void *)APR_OFFSETOF(extension_info, charset_type), OR_FILEINFO,
"a charset (e.g., iso-2022-jp), followed by one or more "
"file extensions"),
AP_INIT_ITERATE2("AddEncoding", add_extension_info,
(void *)APR_OFFSETOF(extension_info, encoding_type), OR_FILEINFO,
"an encoding (e.g., gzip), followed by one or more file extensions"),
AP_INIT_ITERATE2("AddHandler", add_extension_info,
(void *)APR_OFFSETOF(extension_info, handler), OR_FILEINFO,
"a handler name followed by one or more file extensions"),
AP_INIT_ITERATE2("AddInputFilter", add_extension_info,
(void *)APR_OFFSETOF(extension_info, input_filters), OR_FILEINFO,
"input filter name (or ; delimited names) followed by one or "
"more file extensions"),
AP_INIT_ITERATE2("AddLanguage", add_extension_info,
(void *)APR_OFFSETOF(extension_info, language_type), OR_FILEINFO,
"a language (e.g., fr), followed by one or more file extensions"),
AP_INIT_ITERATE2("AddOutputFilter", add_extension_info,
(void *)APR_OFFSETOF(extension_info, output_filters), OR_FILEINFO,
"output filter name (or ; delimited names) followed by one or "
"more file extensions"),
AP_INIT_ITERATE2("AddType", add_extension_info,
(void *)APR_OFFSETOF(extension_info, forced_type), OR_FILEINFO,
"a mime type followed by one or more file extensions"),
AP_INIT_TAKE1("DefaultLanguage", ap_set_string_slot,
(void*)APR_OFFSETOF(mime_dir_config, default_language), OR_FILEINFO,
"language to use for documents with no other language file extension"),
AP_INIT_ITERATE("MultiviewsMatch", multiviews_match, NULL, OR_FILEINFO,
"NegotiatedOnly (default), Handlers and/or Filters, or Any"),
AP_INIT_ITERATE("RemoveCharset", remove_extension_info,
(void *)APR_OFFSETOF(extension_info, charset_type), OR_FILEINFO,
"one or more file extensions"),
AP_INIT_ITERATE("RemoveEncoding", remove_extension_info,
(void *)APR_OFFSETOF(extension_info, encoding_type), OR_FILEINFO,
"one or more file extensions"),
AP_INIT_ITERATE("RemoveHandler", remove_extension_info,
(void *)APR_OFFSETOF(extension_info, handler), OR_FILEINFO,
"one or more file extensions"),
AP_INIT_ITERATE("RemoveInputFilter", remove_extension_info,
(void *)APR_OFFSETOF(extension_info, input_filters), OR_FILEINFO,
"one or more file extensions"),
AP_INIT_ITERATE("RemoveLanguage", remove_extension_info,
(void *)APR_OFFSETOF(extension_info, language_type), OR_FILEINFO,
"one or more file extensions"),
AP_INIT_ITERATE("RemoveOutputFilter", remove_extension_info,
(void *)APR_OFFSETOF(extension_info, output_filters), OR_FILEINFO,
"one or more file extensions"),
AP_INIT_ITERATE("RemoveType", remove_extension_type,
(void *)APR_OFFSETOF(extension_info, forced_type), OR_FILEINFO,
"one or more file extensions"),
AP_INIT_TAKE1("TypesConfig", set_types_config, NULL, RSRC_CONF,
"the MIME types config file"),
AP_INIT_FLAG("ModMimeUsePathInfo", ap_set_flag_slot,
(void *)APR_OFFSETOF(mime_dir_config, use_path_info), ACCESS_CONF,
"Set to 'yes' to allow mod_mime to use path info for type checking"),
{NULL}
};
static apr_hash_t *mime_type_extensions;
static int mime_post_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s)
{
ap_configfile_t *f;
char l[MAX_STRING_LEN];
const char *types_confname = ap_get_module_config(s->module_config,
&mime_module);
apr_status_t status;
if (!types_confname) {
types_confname = AP_TYPES_CONFIG_FILE;
}
types_confname = ap_server_root_relative(p, types_confname);
if (!types_confname) {
ap_log_error(APLOG_MARK, APLOG_ERR, APR_EBADPATH, s,
"Invalid mime types config path %s",
(const char *)ap_get_module_config(s->module_config,
&mime_module));
return HTTP_INTERNAL_SERVER_ERROR;
}
if ((status = ap_pcfg_openfile(&f, ptemp, types_confname))
!= APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_ERR, status, s,
"could not open mime types config file %s.",
types_confname);
return HTTP_INTERNAL_SERVER_ERROR;
}
mime_type_extensions = apr_hash_make(p);
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);
apr_hash_set(mime_type_extensions, ext, APR_HASH_KEY_STRING, ct);
}
}
ap_cfg_closefile(f);
return OK;
}
static const char *zap_sp(const char *s)
{
if (s == NULL) {
return (NULL);
}
if (*s == '\0') {
return (s);
}
/* skip prefixed white space */
for (; *s == ' ' || *s == '\t' || *s == '\n'; s++)
;
return (s);
}
static char *zap_sp_and_dup(apr_pool_t *p, const char *start,
const char *end, apr_size_t *len)
{
while ((start < end) && apr_isspace(*start)) {
start++;
}
while ((end > start) && apr_isspace(*(end - 1))) {
end--;
}
if (len) {
*len = end - start;
}
return apr_pstrmemdup(p, start, end - start);
}
static int is_token(char c)
{
int res;
res = (apr_isascii(c) && apr_isgraph(c)
&& (strchr(tspecial, c) == NULL)) ? 1 : -1;
return res;
}
static int is_qtext(char c)
{
int res;
res = (apr_isascii(c) && (c != '"') && (c != '\\') && (c != '\n'))
? 1 : -1;
return res;
}
static int is_quoted_pair(const char *s)
{
int res = -1;
int c;
if (((s + 1) != NULL) && (*s == '\\')) {
c = (int) *(s + 1);
if (apr_isascii(c)) {
res = 1;
}
}
return (res);
}
static content_type *analyze_ct(request_rec *r, const char *s)
{
const char *cp, *mp;
char *attribute, *value;
int quoted = 0;
server_rec * ss = r->server;
apr_pool_t * p = r->pool;
content_type *ctp;
param *pp, *npp;
/* initialize ctp */
ctp = (content_type *)apr_palloc(p, sizeof(content_type));
ctp->type = NULL;
ctp->subtype = NULL;
ctp->param = NULL;
mp = s;
/* getting a type */
cp = mp;
while (apr_isspace(*cp)) {
cp++;
}
if (!*cp) {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ss,
"mod_mime: analyze_ct: cannot get media type from '%s'",
(const char *) mp);
return (NULL);
}
ctp->type = cp;
do {
cp++;
} while (*cp && (*cp != '/') && !apr_isspace(*cp) && (*cp != ';'));
if (!*cp || (*cp == ';')) {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ss,
"Cannot get media type from '%s'",
(const char *) mp);
return (NULL);
}
while (apr_isspace(*cp)) {
cp++;
}
if (*cp != '/') {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ss,
"mod_mime: analyze_ct: cannot get media type from '%s'",
(const char *) mp);
return (NULL);
}
ctp->type_len = cp - ctp->type;
cp++; /* skip the '/' */
/* getting a subtype */
while (apr_isspace(*cp)) {
cp++;
}
if (!*cp) {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ss,
"Cannot get media subtype.");
return (NULL);
}
ctp->subtype = cp;
do {
cp++;
} while (*cp && !apr_isspace(*cp) && (*cp != ';'));
ctp->subtype_len = cp - ctp->subtype;
while (apr_isspace(*cp)) {
cp++;
}
if (*cp == '\0') {
return (ctp);
}
/* getting parameters */
cp++; /* skip the ';' */
cp = zap_sp(cp);
if (cp == NULL || *cp == '\0') {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ss,
"Cannot get media parameter.");
return (NULL);
}
mp = cp;
attribute = NULL;
value = NULL;
while (cp != NULL && *cp != '\0') {
if (attribute == NULL) {
if (is_token(*cp) > 0) {
cp++;
continue;
}
else if (*cp == ' ' || *cp == '\t' || *cp == '\n') {
cp++;
continue;
}
else if (*cp == '=') {
attribute = zap_sp_and_dup(p, mp, cp, NULL);
if (attribute == NULL || *attribute == '\0') {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ss,
"Cannot get media parameter.");
return (NULL);
}
cp++;
cp = zap_sp(cp);
if (cp == NULL || *cp == '\0') {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ss,
"Cannot get media parameter.");
return (NULL);
}
mp = cp;
continue;
}
else {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ss,
"Cannot get media parameter.");
return (NULL);
}
}
else {
if (mp == cp) {
if (*cp == '"') {
quoted = 1;
cp++;
}
else {
quoted = 0;
}
}
if (quoted > 0) {
while (quoted && *cp != '\0') {
if (is_qtext(*cp) > 0) {
cp++;
}
else if (is_quoted_pair(cp) > 0) {
cp += 2;
}
else if (*cp == '"') {
cp++;
while (*cp == ' ' || *cp == '\t' || *cp == '\n') {
cp++;
}
if (*cp != ';' && *cp != '\0') {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ss,
"Cannot get media parameter.");
return(NULL);
}
quoted = 0;
}
else {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ss,
"Cannot get media parameter.");
return (NULL);
}
}
}
else {
while (1) {
if (is_token(*cp) > 0) {
cp++;
}
else if (*cp == '\0' || *cp == ';') {
break;
}
else {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ss,
"Cannot get media parameter.");
return (NULL);
}
}
}
value = zap_sp_and_dup(p, mp, cp, NULL);
if (value == NULL || *value == '\0') {
ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ss,
"Cannot get media parameter.");
return (NULL);
}
pp = apr_palloc(p, sizeof(param));
pp->attr = attribute;
pp->val = value;
pp->next = NULL;
if (ctp->param == NULL) {
ctp->param = pp;
}
else {
npp = ctp->param;
while (npp->next) {
npp = npp->next;
}
npp->next = pp;
}
quoted = 0;
attribute = NULL;
value = NULL;
if (*cp == '\0') {
break;
}
cp++;
mp = cp;
}
}
return (ctp);
}
/*
* find_ct is the hook routine for determining content-type and other
* MIME-related metadata. It assumes that r->filename has already been
* set and stat has been called for r->finfo. It also assumes that the
* non-path base file name is not the empty string unless it is a dir.
*/
static int find_ct(request_rec *r)
{
mime_dir_config *conf;
apr_array_header_t *exception_list;
char *ext;
const char *fn, *type, *charset = NULL, *resource_name;
int found_metadata = 0;
if (r->finfo.filetype == APR_DIR) {
ap_set_content_type(r, DIR_MAGIC_TYPE);
return OK;
}
if (!r->filename) {
return DECLINED;
}
conf = (mime_dir_config *)ap_get_module_config(r->per_dir_config,
&mime_module);
exception_list = apr_array_make(r->pool, 2, sizeof(char *));
/* If use_path_info is explicitly set to on (value & 1 == 1), append. */
if (conf->use_path_info & 1) {
resource_name = apr_pstrcat(r->pool, r->filename, r->path_info, NULL);
}
else {
resource_name = r->filename;
}
/* Always drop the path leading up to the file name.
*/
if ((fn = ap_strrchr_c(resource_name, '/')) == NULL) {
fn = resource_name;
}
else {
++fn;
}
/* The exception list keeps track of those filename components that
* are not associated with extensions indicating metadata.
* The base name is always the first exception (i.e., "txt.html" has
* a basename of "txt" even though it might look like an extension).
*/
ext = ap_getword(r->pool, &fn, '.');
*((const char **)apr_array_push(exception_list)) = ext;
/* Parse filename extensions which can be in any order
*/
while (*fn && (ext = ap_getword(r->pool, &fn, '.'))) {
const extension_info *exinfo = NULL;
int found;
char *extcase;
if (*ext == '\0') { /* ignore empty extensions "bad..html" */
continue;
}
found = 0;
/* Save the ext in extcase before converting it to lower case.
*/
extcase = apr_pstrdup(r->pool, ext);
ap_str_tolower(ext);
if (conf->extension_mappings != NULL) {
exinfo = (extension_info*)apr_hash_get(conf->extension_mappings,
ext, APR_HASH_KEY_STRING);
}
if (exinfo == NULL || !exinfo->forced_type) {
if ((type = apr_hash_get(mime_type_extensions, ext,
APR_HASH_KEY_STRING)) != NULL) {
ap_set_content_type(r, (char*) type);
found = 1;
}
}
if (exinfo != NULL) {
/* empty string is treated as special case for RemoveType */
if (exinfo->forced_type && *exinfo->forced_type) {
ap_set_content_type(r, exinfo->forced_type);
found = 1;
}
if (exinfo->charset_type) {
charset = exinfo->charset_type;
found = 1;
}
if (exinfo->language_type) {
if (!r->content_languages) {
r->content_languages = apr_array_make(r->pool, 2,
sizeof(char *));
}
*((const char **)apr_array_push(r->content_languages))
= exinfo->language_type;
found = 1;
}
if (exinfo->encoding_type) {
if (!r->content_encoding) {
r->content_encoding = exinfo->encoding_type;
}
else {
/* XXX should eliminate duplicate entities
*
* ah no. Order is important and double encoding is neither
* forbidden nor impossible. -- nd
*/
r->content_encoding = apr_pstrcat(r->pool,
r->content_encoding,
", ",
exinfo->encoding_type,
NULL);
}
found = 1;
}
/* The following extensions are not 'Found'. That is, they don't
* make any contribution to metadata negotiation, so they must have
* been explicitly requested by name.
*/
if (exinfo->handler && r->proxyreq == PROXYREQ_NONE) {
r->handler = exinfo->handler;
if (conf->multimatch & MULTIMATCH_HANDLERS) {
found = 1;
}
}
/* XXX Two significant problems; 1, we don't check to see if we are
* setting redundant filters. 2, we insert these in the types
* config hook, which may be too early (dunno.)
*/
if (exinfo->input_filters && r->proxyreq == PROXYREQ_NONE) {
const char *filter, *filters = exinfo->input_filters;
while (*filters
&& (filter = ap_getword(r->pool, &filters, ';'))) {
ap_add_input_filter(filter, NULL, r, r->connection);
}
if (conf->multimatch & MULTIMATCH_FILTERS) {
found = 1;
}
}
if (exinfo->output_filters && r->proxyreq == PROXYREQ_NONE) {
const char *filter, *filters = exinfo->output_filters;
while (*filters
&& (filter = ap_getword(r->pool, &filters, ';'))) {
ap_add_output_filter(filter, NULL, r, r->connection);
}
if (conf->multimatch & MULTIMATCH_FILTERS) {
found = 1;
}
}
}
if (found || (conf->multimatch & MULTIMATCH_ANY)) {
found_metadata = 1;
}
else {
*((const char **) apr_array_push(exception_list)) = extcase;
}
}
/*
* Need to set a notes entry on r for unrecognized elements.
* Somebody better claim them! If we did absolutely nothing,
* skip the notes to alert mod_negotiation we are clueless.
*/
if (found_metadata) {
apr_table_setn(r->notes, "ap-mime-exceptions-list",
(void *)exception_list);
}
if (r->content_type) {
content_type *ctp;
int override = 0;
if ((ctp = analyze_ct(r, r->content_type))) {
param *pp = ctp->param;
char *base_content_type = apr_palloc(r->pool, ctp->type_len +
ctp->subtype_len +
sizeof("/"));
char *tmp = base_content_type;
memcpy(tmp, ctp->type, ctp->type_len);
tmp += ctp->type_len;
*tmp++ = '/';
memcpy(tmp, ctp->subtype, ctp->subtype_len);
tmp += ctp->subtype_len;
*tmp = 0;
ap_set_content_type(r, base_content_type);
while (pp != NULL) {
if (charset && !strcmp(pp->attr, "charset")) {
if (!override) {
ap_set_content_type(r,
apr_pstrcat(r->pool,
r->content_type,
"; charset=",
charset,
NULL));
override = 1;
}
}
else {
ap_set_content_type(r,
apr_pstrcat(r->pool,
r->content_type,
"; ", pp->attr,
"=", pp->val,
NULL));
}
pp = pp->next;
}
if (charset && !override) {
ap_set_content_type(r, apr_pstrcat(r->pool, r->content_type,
"; charset=", charset,
NULL));
}
}
}
/* 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;
if (!r->content_languages) {
r->content_languages = apr_array_make(r->pool, 2, sizeof(char *));
}
new = (const char **)apr_array_push(r->content_languages);
*new = conf->default_language;
}
if (!r->content_type) {
return DECLINED;
}
return OK;
}
static void register_hooks(apr_pool_t *p)
{
ap_hook_post_config(mime_post_config,NULL,NULL,APR_HOOK_MIDDLE);
ap_hook_type_checker(find_ct,NULL,NULL,APR_HOOK_MIDDLE);
/*
* this hook seems redundant ... is there any reason a type checker isn't
* allowed to do this already? I'd think that fixups in general would be
* the last opportunity to get the filters right.
* ap_hook_insert_filter(mime_insert_filters,NULL,NULL,APR_HOOK_MIDDLE);
*/
}
AP_DECLARE_MODULE(mime) = {
STANDARD20_MODULE_STUFF,
create_mime_dir_config, /* create per-directory config structure */
merge_mime_dir_configs, /* merge per-directory config structures */
NULL, /* create per-server config structure */
NULL, /* merge per-server config structures */
mime_cmds, /* command apr_table_t */
register_hooks /* register hooks */
};