/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2001 The Apache Software Foundation. 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. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" 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 name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``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 SOFTWARE FOUNDATION 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 Software Foundation. For more
* information on the Apache Software Foundation, please see
* .
*
* Portions of this software are based upon public domain software
* originally written at the National Center for Supercomputing Applications,
* University of Illinois, Urbana-Champaign.
*/
/*
* http_request.c: functions to get and process requests
*
* Rob McCool 3/21/93
*
* Thoroughly revamped by rst for Apache. NB this file reads
* best from the bottom up.
*
*/
#include "apr_strings.h"
#include "apr_file_io.h"
#include "apr_fnmatch.h"
#define APR_WANT_STRFUNC
#include "apr_want.h"
#define CORE_PRIVATE
#include "ap_config.h"
#include "httpd.h"
#include "http_config.h"
#include "http_request.h"
#include "http_core.h"
#include "http_protocol.h"
#include "http_log.h"
#include "http_main.h"
#include "util_filter.h"
#include "util_charset.h"
#include "mod_core.h"
#if APR_HAVE_STDARG_H
#include
#endif
APR_HOOK_STRUCT(
APR_HOOK_LINK(translate_name)
APR_HOOK_LINK(check_user_id)
APR_HOOK_LINK(fixups)
APR_HOOK_LINK(type_checker)
APR_HOOK_LINK(access_checker)
APR_HOOK_LINK(auth_checker)
APR_HOOK_LINK(insert_filter)
APR_HOOK_LINK(create_request)
)
AP_IMPLEMENT_HOOK_RUN_FIRST(int,translate_name,
(request_rec *r),(r),DECLINED)
AP_IMPLEMENT_HOOK_RUN_FIRST(int,check_user_id,
(request_rec *r),(r),DECLINED)
AP_IMPLEMENT_HOOK_RUN_ALL(int,fixups,
(request_rec *r),(r),OK,DECLINED)
AP_IMPLEMENT_HOOK_RUN_FIRST(int,type_checker,
(request_rec *r),(r),DECLINED)
AP_IMPLEMENT_HOOK_RUN_ALL(int,access_checker,
(request_rec *r),(r),OK,DECLINED)
AP_IMPLEMENT_HOOK_RUN_FIRST(int,auth_checker,
(request_rec *r),(r),DECLINED)
AP_IMPLEMENT_HOOK_VOID(insert_filter, (request_rec *r), (r))
AP_IMPLEMENT_HOOK_RUN_ALL(int,create_request,(request_rec *r),(r),OK,DECLINED)
/*****************************************************************
*
* Getting and checking directory configuration. Also checks the
* FollowSymlinks and FollowSymOwner stuff, since this is really the
* only place that can happen (barring a new mid_dir_walk callout).
*
* We can't do it as an access_checker module function which gets
* called with the final per_dir_config, since we could have a directory
* with FollowSymLinks disabled, which contains a symlink to another
* with a .htaccess file which turns FollowSymLinks back on --- and
* access in such a case must be denied. So, whatever it is that
* checks FollowSymLinks needs to know the state of the options as
* they change, all the way down.
*/
/*
* We don't want people able to serve up pipes, or unix sockets, or other
* scary things. Note that symlink tests are performed later.
*/
static int check_safe_file(request_rec *r)
{
if (r->finfo.filetype == 0 /* doesn't exist */
|| r->finfo.filetype == APR_DIR
|| r->finfo.filetype == APR_REG
|| r->finfo.filetype == APR_LNK) {
return OK;
}
ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, r,
"object is not a file, directory or symlink: %s",
r->filename);
return HTTP_FORBIDDEN;
}
static int check_symlinks(char *d, int opts, apr_pool_t *p)
{
#if defined(OS2)
/* OS/2 doesn't have symlinks */
return OK;
#else
apr_finfo_t lfi, fi;
char *lastp;
int res;
if (opts & OPT_SYM_LINKS)
return OK;
/*
* Strip trailing '/', if any, off what we're checking; trailing slashes
* make some systems follow symlinks to directories even in lstat().
* After we've done the lstat, put it back. Also, don't bother checking
* '/' at all...
*
* Note that we don't have to worry about multiple slashes here because of
* no2slash() below...
*/
lastp = d + strlen(d) - 1;
if (lastp == d)
return OK; /* Root directory, '/' */
if (*lastp == '/')
*lastp = '\0';
else
lastp = NULL;
res = apr_lstat(&lfi, d, APR_FINFO_TYPE | APR_FINFO_OWNER, p);
if (lastp)
*lastp = '/';
/*
* Note that we don't reject accesses to nonexistent files (multiviews or
* the like may cons up a way to run the transaction anyway)...
*/
if ((res != APR_SUCCESS && res != APR_INCOMPLETE)
|| (lfi.filetype != APR_LNK))
return OK;
/* OK, it's a symlink. May still be OK with OPT_SYM_OWNER */
if (!(opts & OPT_SYM_OWNER))
return HTTP_FORBIDDEN;
/* OPT_SYM_OWNER only works if we can get the owner from the file */
if (res != APR_SUCCESS)
return HTTP_FORBIDDEN;
if (apr_stat(&fi, d, APR_FINFO_OWNER, p) != APR_SUCCESS)
return HTTP_FORBIDDEN;
/* TODO: replace with an apr_compare_users() fn */
return (fi.user == lfi.user) ? OK : HTTP_FORBIDDEN;
#endif
}
/* Dealing with the file system to get PATH_INFO
*/
static int get_path_info(request_rec *r)
{
char *cp;
char *path = r->filename;
char *end = &path[strlen(path)];
char *last_cp = NULL;
int rv;
#if defined(HAVE_DRIVE_LETTERS) || defined(HAVE_UNC_PATHS)
char bStripSlash=1;
#endif
if (r->finfo.filetype != APR_NOFILE) {
/* assume path_info already set */
return OK;
}
#ifdef HAVE_DRIVE_LETTERS
/* If the directory is x:\, then we don't want to strip
* the trailing slash since x: is not a valid directory.
*/
if (strlen(path) == 3 && path[1] == ':' && path[2] == '/')
bStripSlash = 0;
#endif
#ifdef HAVE_UNC_PATHS
/* If UNC name == //machine/share/, do not
* advance over the trailing slash. Any other
* UNC name is OK to strip the slash.
*/
cp = end;
if (path[0] == '/' && path[1] == '/' &&
path[2] != '/' && cp[-1] == '/') {
char *p;
int iCount=0;
p = path;
while ((p = strchr(p,'/')) != NULL) {
p++;
iCount++;
}
if (iCount == 4)
bStripSlash = 0;
}
#endif
#if defined(HAVE_DRIVE_LETTERS) || defined(HAVE_UNC_PATHS)
if (bStripSlash)
#endif
/* Advance over trailing slashes ... NOT part of filename
* if file is not a UNC name (Win32 only).
*/
for (cp = end; cp > path && cp[-1] == '/'; --cp)
continue;
while (cp > path) {
/* See if the pathname ending here exists... */
*cp = '\0';
/* ### We no longer need the test ap_os_is_filename_valid() here
* since apr_stat isn't a posix thing - it's apr_stat's responsibility
* to handle whatever path string arrives at it's door - by platform
* and volume restrictions as applicable...
* TODO: This code becomes even simpler if apr_stat grows
* an APR_PATHINCOMPLETE result to indicate that we are staring at
* an partial virtual root. Only OS2/Win32/Netware need apply it :-)
*/
rv = apr_stat(&r->finfo, path, APR_FINFO_MIN, r->pool);
if (cp != end)
*cp = '/';
if (rv == APR_SUCCESS || rv == APR_INCOMPLETE) {
/*
* Aha! Found something. If it was a directory, we will search
* contents of that directory for a multi_match, so the PATH_INFO
* argument starts with the component after that.
*/
if (r->finfo.filetype == APR_DIR && last_cp) {
r->finfo.filetype = APR_NOFILE; /* No such file... */
cp = last_cp;
}
r->path_info = apr_pstrdup(r->pool, cp);
*cp = '\0';
return OK;
}
if (APR_STATUS_IS_ENOENT(rv) || APR_STATUS_IS_ENOTDIR(rv)) {
last_cp = cp;
while (--cp > path && *cp != '/')
continue;
while (cp > path && cp[-1] == '/')
--cp;
}
else {
if (APR_STATUS_IS_EACCES(rv))
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
"access to %s denied", r->uri);
else
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r,
"access to %s failed", r->uri);
return HTTP_FORBIDDEN;
}
}
return OK;
}
AP_DECLARE(int) directory_walk(request_rec *r)
{
core_server_config *sconf = ap_get_module_config(r->server->module_config,
&core_module);
ap_conf_vector_t *per_dir_defaults = r->server->lookup_defaults;
ap_conf_vector_t **sec = (ap_conf_vector_t **) sconf->sec->elts;
int num_sec = sconf->sec->nelts;
char *test_filename;
char *test_dirname;
int res;
unsigned i, num_dirs;
int j, test_filename_len;
#if defined(HAVE_UNC_PATHS) || defined(NETWARE)
unsigned iStart = 1;
#endif
ap_conf_vector_t *entry_config;
ap_conf_vector_t *this_conf;
core_dir_config *entry_core;
/*
* Are we dealing with a file? If not, we can (hopefuly) safely assume we
* have a handler that doesn't require one, but for safety's sake, and so
* we have something find_types() can get something out of, fake one. But
* don't run through the directory entries.
*/
if (r->filename == NULL) {
r->filename = apr_pstrdup(r->pool, r->uri);
r->finfo.filetype = APR_NOFILE;
r->per_dir_config = per_dir_defaults;
return OK;
}
/*
* Go down the directory hierarchy. Where we have to check for symlinks,
* do so. Where a .htaccess file has permission to override anything,
* try to find one. If either of these things fails, we could poke
* around, see why, and adjust the lookup_rec accordingly --- this might
* save us a call to get_path_info (with the attendant stat()s); however,
* for the moment, that's not worth the trouble.
*
* Fake filenames (i.e. proxy:) only match Directory sections.
*/
if (!ap_os_is_path_absolute(r->filename))
{
const char *entry_dir;
for (j = 0; j < num_sec; ++j) {
entry_config = sec[j];
entry_core = ap_get_module_config(entry_config, &core_module);
entry_dir = entry_core->d;
this_conf = NULL;
if (entry_core->r) {
if (!ap_regexec(entry_core->r, r->filename, 0, NULL, 0))
this_conf = entry_config;
}
else if (entry_core->d_is_fnmatch) {
if (!apr_fnmatch(entry_dir, r->filename, 0))
this_conf = entry_config;
}
else if (!strncmp(r->filename, entry_dir, strlen(entry_dir)))
this_conf = entry_config;
if (this_conf)
per_dir_defaults = ap_merge_per_dir_configs(r->pool,
per_dir_defaults,
this_conf);
}
r->per_dir_config = per_dir_defaults;
return OK;
}
/* XXX This needs to be rolled into APR, the APR function will not
* be allowed to fold the case of any non-existant segment of the path:
*/
r->filename = ap_os_case_canonical_filename(r->pool, r->filename);
/* TODO This is rather silly right here, we should simply be setting
* filename and path_info at the end of our directory_walk
*/
res = get_path_info(r);
if (res != OK) {
return res;
}
/* XXX This becomes moot, and will already happen above for elements
* that actually exist:
*/
r->filename = ap_os_canonical_filename(r->pool, r->filename);
test_filename = apr_pstrdup(r->pool, r->filename);
/* XXX This becomes mute, since the APR canonical parsing will handle
* 2slash and dot directory issues:
*/
ap_no2slash(test_filename);
num_dirs = ap_count_dirs(test_filename);
/* XXX This needs to be rolled into APR: */
if ((res = check_safe_file(r))) {
return res;
}
test_filename_len = strlen(test_filename);
if (test_filename[test_filename_len - 1] == '/')
--num_dirs;
if (r->finfo.filetype == APR_DIR)
++num_dirs;
/*
* We will use test_dirname as scratch space while we build directory
* names during the walk. Profiling shows directory_walk to be a busy
* function so we try to avoid allocating lots of extra memory here.
* We need 2 extra bytes, one for trailing \0 and one because
* make_dirstr_prefix will add potentially one extra /.
*/
test_dirname = apr_palloc(r->pool, test_filename_len + 2);
/* XXX These exception cases go away if apr_stat() returns the
* APR_PATHINCOMPLETE status, so we skip hard filesystem testing
* of the initial 'pseudo' elements:
*/
#if defined(HAVE_UNC_PATHS)
/* If the name is a UNC name, then do not perform any true file test
* against the machine name (start at //machine/share/)
* This is optimized to use the normal walk (skips the redundant '/' root)
*/
if (num_dirs > 3 && test_filename[0] == '/' && test_filename[1] == '/')
iStart = 4;
#endif
#if defined(NETWARE)
/* If the name is a fully qualified volume name, then do not perform any
* true file test on the machine name (start at machine/share:/)
* XXX: The implementation eludes me at this moment...
* Does this make sense? Please test!
*/
if (num_dirs > 1 && strchr(test_filename, '/') < strchr(test_filename, ':'))
iStart = 2;
#endif
#if defined(HAVE_DRIVE_LETTERS) || defined(NETWARE)
/* Should match sections starting from '/', not 'e:/'
* (for example). WIN32/OS2/NETWARE do not have a single root directory,
* they have one for each filesystem. Traditionally, Apache has treated
* permissions as the base for the whole server, and this
* tradition should probably be preserved.
*
* NOTE: MUST SYNC WITH ap_make_dirstr_prefix() CHANGE IN src/main/util.c
*/
if (test_filename[0] == '/')
i = 1;
else
i = 0;
#else
/* Normal File Systems are rooted at / */
i = 1;
#endif /* def HAVE_DRIVE_LETTERS || NETWARE */
/* j keeps track of which section we're on, see core_reorder_directories */
j = 0;
for (; i <= num_dirs; ++i) {
int overrides_here;
core_dir_config *core_dir = ap_get_module_config(per_dir_defaults,
&core_module);
/*
* XXX: this could be made faster by only copying the next component
* rather than copying the entire thing all over.
*/
ap_make_dirstr_prefix(test_dirname, test_filename, i);
/*
* Do symlink checks first, because they are done with the
* permissions appropriate to the *parent* directory...
*/
#if defined(HAVE_UNC_PATHS) || defined(NETWARE)
/* Test only legal names against the real filesystem */
if (i >= iStart)
#endif
if ((res = check_symlinks(test_dirname, core_dir->opts, r->pool))) {
ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, r,
"Symbolic link not allowed: %s", test_dirname);
return res;
}
/*
* Begin *this* level by looking for matching sections
* from access.conf.
*/
for (; j < num_sec; ++j) {
char *entry_dir;
entry_config = sec[j];
entry_core = ap_get_module_config(entry_config, &core_module);
entry_dir = entry_core->d;
if (entry_core->r
|| !ap_os_is_path_absolute(entry_dir)
#if defined(HAVE_DRIVE_LETTERS) || defined(NETWARE)
/* To account for the top-level "/" directory when i == 0
* XXX: The net test may be wrong... may fail ap_os_is_path_absolute
*/
|| (entry_core->d_components > 1
&& entry_core->d_components > i)
#else
|| entry_core->d_components > i
#endif /* def HAVE_DRIVE_LETTERS || NETWARE */
)
break;
this_conf = NULL;
if (entry_core->d_is_fnmatch) {
if (!apr_fnmatch(entry_dir, test_dirname, FNM_PATHNAME)) {
this_conf = entry_config;
}
}
else if (!strcmp(test_dirname, entry_dir))
this_conf = entry_config;
if (this_conf) {
per_dir_defaults = ap_merge_per_dir_configs(r->pool,
per_dir_defaults,
this_conf);
core_dir = ap_get_module_config(per_dir_defaults,
&core_module);
}
#if defined(HAVE_DRIVE_LETTERS) || defined(NETWARE)
/* So that other top-level directory sections (e.g. "e:/") aren't
* skipped when i == 0
* XXX: I don't get you here, Tim... That's a level 1 section, but
* we are at level 0. Did you mean fast-forward to the next?
*/
else if (!i)
break;
#endif /* def HAVE_DRIVE_LETTERS || NETWARE */
}
overrides_here = core_dir->override;
/* If .htaccess files are enabled, check for one. */
#if defined(HAVE_UNC_PATHS) || defined(NETWARE)
/* Test only legal names against the real filesystem */
if (i >= iStart)
#endif
if (overrides_here) {
ap_conf_vector_t *htaccess_conf = NULL;
res = ap_parse_htaccess(&htaccess_conf, r, overrides_here,
apr_pstrdup(r->pool, test_dirname),
sconf->access_name);
if (res)
return res;
if (htaccess_conf) {
per_dir_defaults = ap_merge_per_dir_configs(r->pool,
per_dir_defaults,
htaccess_conf);
r->per_dir_config = per_dir_defaults;
}
}
}
/*
* There's two types of IS_SPECIAL sections (see http_core.c), and we've
* already handled the proxy:-style stuff. Now we'll deal with the
* regexes.
*/
for (; j < num_sec; ++j) {
entry_config = sec[j];
entry_core = ap_get_module_config(entry_config, &core_module);
if (entry_core->r) {
if (!ap_regexec(entry_core->r, test_dirname, 0, NULL, REG_NOTEOL)) {
per_dir_defaults = ap_merge_per_dir_configs(r->pool,
per_dir_defaults,
entry_config);
}
}
}
r->per_dir_config = per_dir_defaults;
/*
* Symlink permissions are determined by the parent. If the request is
* for a directory then applying the symlink test here would use the
* permissions of the directory as opposed to its parent. Consider a
* symlink pointing to a dir with a .htaccess disallowing symlinks. If
* you access /symlink (or /symlink/) you would get a 403 without this
* S_ISDIR test. But if you accessed /symlink/index.html, for example,
* you would *not* get the 403.
*/
if (r->finfo.filetype != APR_DIR
&& (res = check_symlinks(r->filename, ap_allow_options(r), r->pool))) {
ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, r,
"Symbolic link not allowed: %s", r->filename);
return res;
}
return OK; /* Can only "fail" if access denied by the
* symlink goop. */
}
AP_DECLARE(int) location_walk(request_rec *r)
{
core_server_config *sconf = ap_get_module_config(r->server->module_config,
&core_module);
ap_conf_vector_t *per_dir_defaults = r->per_dir_config;
ap_conf_vector_t **url = (ap_conf_vector_t **) sconf->sec_url->elts;
int len, num_url = sconf->sec_url->nelts;
char *test_location;
ap_conf_vector_t *this_conf;
ap_conf_vector_t *entry_config;
core_dir_config *entry_core;
char *entry_url;
int j;
if (!num_url) {
return OK;
}
/* Location and LocationMatch differ on their behaviour w.r.t. multiple
* slashes. Location matches multiple slashes with a single slash,
* LocationMatch doesn't. An exception, for backwards brokenness is
* absoluteURIs... in which case neither match multiple slashes.
*/
if (r->uri[0] != '/') {
test_location = r->uri;
}
else {
test_location = apr_pstrdup(r->pool, r->uri);
ap_no2slash(test_location);
}
/* Go through the location entries, and check for matches. */
/* we apply the directive sections in some order;
* should really try them with the most general first.
*/
for (j = 0; j < num_url; ++j) {
entry_config = url[j];
entry_core = ap_get_module_config(entry_config, &core_module);
entry_url = entry_core->d;
len = strlen(entry_url);
this_conf = NULL;
if (entry_core->r) {
if (!ap_regexec(entry_core->r, r->uri, 0, NULL, 0))
this_conf = entry_config;
}
else if (entry_core->d_is_fnmatch) {
if (!apr_fnmatch(entry_url, test_location, FNM_PATHNAME)) {
this_conf = entry_config;
}
}
else if (!strncmp(test_location, entry_url, len) &&
(entry_url[len - 1] == '/' ||
test_location[len] == '/' || test_location[len] == '\0'))
this_conf = entry_config;
if (this_conf)
per_dir_defaults = ap_merge_per_dir_configs(r->pool,
per_dir_defaults,
this_conf);
}
r->per_dir_config = per_dir_defaults;
return OK;
}
AP_DECLARE(int) file_walk(request_rec *r)
{
core_dir_config *conf = ap_get_module_config(r->per_dir_config,
&core_module);
ap_conf_vector_t *per_dir_defaults = r->per_dir_config;
ap_conf_vector_t **file = (ap_conf_vector_t **) conf->sec->elts;
int num_files = conf->sec->nelts;
char *test_file;
/* get the basename */
test_file = strrchr(r->filename, '/');
if (test_file == NULL) {
test_file = r->filename;
}
else {
++test_file;
}
/* Go through the file entries, and check for matches. */
if (num_files) {
ap_conf_vector_t *this_conf;
ap_conf_vector_t *entry_config;
core_dir_config *entry_core;
char *entry_file;
int j;
/* we apply the directive sections in some order;
* should really try them with the most general first.
*/
for (j = 0; j < num_files; ++j) {
entry_config = file[j];
entry_core = ap_get_module_config(entry_config, &core_module);
entry_file = entry_core->d;
this_conf = NULL;
if (entry_core->r) {
if (!ap_regexec(entry_core->r, test_file, 0, NULL, 0))
this_conf = entry_config;
}
else if (entry_core->d_is_fnmatch) {
if (!apr_fnmatch(entry_file, test_file, FNM_PATHNAME)) {
this_conf = entry_config;
}
}
else if (!strcmp(test_file, entry_file)) {
this_conf = entry_config;
}
if (this_conf)
per_dir_defaults = ap_merge_per_dir_configs(r->pool,
per_dir_defaults,
this_conf);
}
r->per_dir_config = per_dir_defaults;
}
return OK;
}
/*****************************************************************
*
* The sub_request mechanism.
*
* Fns to look up a relative URI from, e.g., a map file or SSI document.
* These do all access checks, etc., but don't actually run the transaction
* ... use run_sub_req below for that. Also, be sure to use destroy_sub_req
* as appropriate if you're likely to be creating more than a few of these.
* (An early Apache version didn't destroy the sub_reqs used in directory
* indexing. The result, when indexing a directory with 800-odd files in
* it, was massively excessive storage allocation).
*
* Note more manipulation of protocol-specific vars in the request
* structure...
*/
static request_rec *make_sub_request(const request_rec *r)
{
apr_pool_t *rrp;
request_rec *rr;
apr_pool_create(&rrp, r->pool);
rr = apr_pcalloc(rrp, sizeof(request_rec));
rr->pool = rrp;
return rr;
}
static void fill_in_sub_req_vars(request_rec *rnew, const request_rec *r,
ap_filter_t *next_filter)
{
rnew->hostname = r->hostname;
rnew->request_time = r->request_time;
rnew->connection = r->connection;
rnew->server = r->server;
rnew->request_config = ap_create_request_config(rnew->pool);
rnew->htaccess = r->htaccess;
rnew->allowed_methods = ap_make_method_list(rnew->pool, 2);
/* make a copy of the allowed-methods list */
ap_copy_method_list(rnew->allowed_methods, r->allowed_methods);
/* start with the same set of output filters */
if (next_filter) {
rnew->output_filters = next_filter;
}
else {
rnew->output_filters = r->output_filters;
}
ap_add_output_filter("SUBREQ_CORE", NULL, rnew, rnew->connection);
/* no input filters for a subrequest */
ap_set_sub_req_protocol(rnew, r);
}
static int sub_req_common_validation(request_rec *rnew)
{
int res;
if ((( ap_satisfies(rnew) == SATISFY_ALL
|| ap_satisfies(rnew) == SATISFY_NOSPEC)
? ((res = ap_run_access_checker(rnew))
|| (ap_some_auth_required(rnew)
&& ((res = ap_run_check_user_id(rnew))
|| (res = ap_run_auth_checker(rnew)))))
: ((res = ap_run_access_checker(rnew))
&& (!ap_some_auth_required(rnew)
|| ((res = ap_run_check_user_id(rnew))
|| (res = ap_run_auth_checker(rnew)))))
)
|| (res = ap_run_type_checker(rnew))
|| (res = ap_run_fixups(rnew)))
return res;
else
return 0;
}
AP_CORE_DECLARE_NONSTD(apr_status_t) ap_sub_req_output_filter(ap_filter_t *f,
apr_bucket_brigade *bb)
{
apr_bucket *e = APR_BRIGADE_LAST(bb);
if (APR_BUCKET_IS_EOS(e)) {
apr_bucket_delete(e);
}
return ap_pass_brigade(f->next, bb);
}
AP_DECLARE(int) ap_some_auth_required(request_rec *r)
{
/* Is there a require line configured for the type of *this* req? */
const apr_array_header_t *reqs_arr = ap_requires(r);
require_line *reqs;
int i;
if (!reqs_arr)
return 0;
reqs = (require_line *) reqs_arr->elts;
for (i = 0; i < reqs_arr->nelts; ++i)
if (reqs[i].method_mask & (1 << r->method_number))
return 1;
return 0;
}
AP_DECLARE(request_rec *) ap_sub_req_method_uri(const char *method,
const char *new_file,
const request_rec *r,
ap_filter_t *next_filter)
{
request_rec *rnew;
int res;
char *udir;
rnew = make_sub_request(r);
fill_in_sub_req_vars(rnew, r, next_filter);
rnew->per_dir_config = r->server->lookup_defaults;
/* We have to run this after ap_set_sub_req_protocol, or the r->main
* pointer won't be setup
*/
ap_run_create_request(rnew);
/* would be nicer to pass "method" to ap_set_sub_req_protocol */
rnew->method = method;
rnew->method_number = ap_method_number_of(method);
if (new_file[0] == '/')
ap_parse_uri(rnew, new_file);
else {
udir = ap_make_dirstr_parent(rnew->pool, r->uri);
udir = ap_escape_uri(rnew->pool, udir); /* re-escape it */
ap_parse_uri(rnew, ap_make_full_path(rnew->pool, udir, new_file));
}
res = ap_unescape_url(rnew->uri);
if (res) {
rnew->status = res;
return rnew;
}
ap_getparents(rnew->uri);
if ((res = location_walk(rnew))) {
rnew->status = res;
return rnew;
}
res = ap_run_translate_name(rnew);
if (res) {
rnew->status = res;
return rnew;
}
/*
* We could be clever at this point, and avoid calling directory_walk,
* etc. However, we'd need to test that the old and new filenames contain
* the same directory components, so it would require duplicating the
* start of translate_name. Instead we rely on the cache of .htaccess
* results.
*
* NB: directory_walk() clears the per_dir_config, so we don't inherit
* from location_walk() above
*/
if ((res = directory_walk(rnew))
|| (res = file_walk(rnew))
|| (res = location_walk(rnew))
|| (res = sub_req_common_validation(rnew))) {
rnew->status = res;
}
return rnew;
}
AP_DECLARE(request_rec *) ap_sub_req_lookup_uri(const char *new_file,
const request_rec *r,
ap_filter_t *next_filter)
{
return ap_sub_req_method_uri("GET", new_file, r, next_filter);
}
AP_DECLARE(request_rec *) ap_sub_req_lookup_dirent(const apr_finfo_t *dirent,
const request_rec *r,
ap_filter_t *next_filter)
{
apr_status_t rv;
request_rec *rnew;
int res;
char *fdir;
char *udir;
rnew = make_sub_request(r);
fill_in_sub_req_vars(rnew, r, next_filter);
rnew->chunked = r->chunked;
/* We have to run this after ap_set_sub_req_protocol, or the r->main
* pointer won't be setup
*/
ap_run_create_request(rnew);
fdir = ap_make_dirstr_parent(rnew->pool, r->filename);
/*
* Special case: we are looking at a relative lookup in the same directory.
* That means we won't have to redo directory_walk, and we may
* not even have to redo access checks.
*/
udir = ap_make_dirstr_parent(rnew->pool, r->uri);
rnew->uri = ap_make_full_path(rnew->pool, udir, dirent->name);
rnew->filename = ap_make_full_path(rnew->pool, fdir, dirent->name);
ap_parse_uri(rnew, rnew->uri); /* fill in parsed_uri values */
if ((dirent->valid & APR_FINFO_MIN) != APR_FINFO_MIN) {
if (((rv = apr_stat(&rnew->finfo, rnew->filename,
APR_FINFO_MIN, rnew->pool)) != APR_SUCCESS)
&& (rv != APR_INCOMPLETE)) {
rnew->finfo.filetype = 0;
}
}
else {
memcpy (&rnew->finfo, dirent, sizeof(apr_finfo_t));
}
if ((res = check_safe_file(rnew))) {
rnew->status = res;
return rnew;
}
rnew->per_dir_config = r->per_dir_config;
/*
* no matter what, if it's a subdirectory, we need to re-run
* directory_walk
*/
if (rnew->finfo.filetype == APR_DIR) {
res = directory_walk(rnew);
if (!res) {
res = file_walk(rnew);
}
}
else {
if ((res = check_symlinks(rnew->filename, ap_allow_options(rnew),
rnew->pool))) {
ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, rnew,
"Symbolic link not allowed: %s", rnew->filename);
rnew->status = res;
return rnew;
}
/*
* do a file_walk, if it doesn't change the per_dir_config then
* we know that we don't have to redo all the access checks
*/
if ((res = file_walk(rnew))) {
rnew->status = res;
return rnew;
}
if (rnew->per_dir_config == r->per_dir_config) {
if ((res = ap_run_type_checker(rnew)) || (res = ap_run_fixups(rnew))) {
rnew->status = res;
}
return rnew;
}
}
if (res || (res = sub_req_common_validation(rnew))) {
rnew->status = res;
}
return rnew;
}
AP_DECLARE(request_rec *) ap_sub_req_lookup_file(const char *new_file,
const request_rec *r,
ap_filter_t *next_filter)
{
request_rec *rnew;
int res;
char *fdir;
rnew = make_sub_request(r);
fill_in_sub_req_vars(rnew, r, next_filter);
rnew->chunked = r->chunked;
/* We have to run this after ap_set_sub_req_protocol, or the r->main
* pointer won't be setup
*/
ap_run_create_request(rnew);
fdir = ap_make_dirstr_parent(rnew->pool, r->filename);
/*
* Check for a special case... if there are no '/' characters in new_file
* at all, then we are looking at a relative lookup in the same
* directory. That means we won't have to redo directory_walk, and we may
* not even have to redo access checks.
*/
if (ap_strchr_c(new_file, '/') == NULL) {
char *udir = ap_make_dirstr_parent(rnew->pool, r->uri);
apr_status_t rv;
rnew->uri = ap_make_full_path(rnew->pool, udir, new_file);
rnew->filename = ap_make_full_path(rnew->pool, fdir, new_file);
ap_parse_uri(rnew, rnew->uri); /* fill in parsed_uri values */
if (((rv = apr_stat(&rnew->finfo, rnew->filename,
APR_FINFO_MIN, rnew->pool)) != APR_SUCCESS)
&& (rv != APR_INCOMPLETE)) {
rnew->finfo.filetype = 0;
}
if ((res = check_safe_file(rnew))) {
rnew->status = res;
return rnew;
}
rnew->per_dir_config = r->per_dir_config;
/*
* no matter what, if it's a subdirectory, we need to re-run
* directory_walk
*/
if (rnew->finfo.filetype == APR_DIR) {
res = directory_walk(rnew);
if (!res) {
res = file_walk(rnew);
}
}
else {
if ((res = check_symlinks(rnew->filename, ap_allow_options(rnew),
rnew->pool))) {
ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, rnew,
"Symbolic link not allowed: %s", rnew->filename);
rnew->status = res;
return rnew;
}
/*
* do a file_walk, if it doesn't change the per_dir_config then
* we know that we don't have to redo all the access checks
*/
if ((res = file_walk(rnew))) {
rnew->status = res;
return rnew;
}
if (rnew->per_dir_config == r->per_dir_config) {
if ((res = ap_run_type_checker(rnew)) || (res = ap_run_fixups(rnew))) {
rnew->status = res;
}
return rnew;
}
}
}
else {
/* XXX: @@@: What should be done with the parsed_uri values? */
ap_parse_uri(rnew, new_file); /* fill in parsed_uri values */
/*
* XXX: this should be set properly like it is in the same-dir case
* but it's actually sometimes to impossible to do it... because the
* file may not have a uri associated with it -djg
*/
rnew->uri = "INTERNALLY GENERATED file-relative req";
rnew->filename = ((ap_os_is_path_absolute(new_file)) ?
apr_pstrdup(rnew->pool, new_file) :
ap_make_full_path(rnew->pool, fdir, new_file));
rnew->per_dir_config = r->server->lookup_defaults;
res = directory_walk(rnew);
if (!res) {
res = file_walk(rnew);
}
}
if (res || (res = sub_req_common_validation(rnew))) {
rnew->status = res;
}
return rnew;
}
AP_DECLARE(int) ap_run_sub_req(request_rec *r)
{
int retval;
/* see comments in process_request_internal() */
ap_run_insert_filter(r);
retval = ap_invoke_handler(r);
ap_finalize_sub_req_protocol(r);
return retval;
}
AP_DECLARE(void) ap_destroy_sub_req(request_rec *r)
{
/* Reclaim the space */
apr_pool_destroy(r->pool);
}
/*
* Function to set the r->mtime field to the specified value if it's later
* than what's already there.
*/
AP_DECLARE(void) ap_update_mtime(request_rec *r, apr_time_t dependency_mtime)
{
if (r->mtime < dependency_mtime) {
r->mtime = dependency_mtime;
}
}
/*
* Is it the initial main request, which we only get *once* per HTTP request?
*/
AP_DECLARE(int) ap_is_initial_req(request_rec *r)
{
return
(r->main == NULL) /* otherwise, this is a sub-request */
&&
(r->prev == NULL); /* otherwise, this is an internal redirect */
}