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a8ce196da5
all of the Apache macros that modules don't need access to. This should have been committed with the modules, but I wasn't paying attention to the directory I was in when I ran the commit. Submitted by: Manoj Kasichainula and Ryan Bloom git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@84493 13f79535-47bb-0310-9956-ffa450edef68
685 lines
20 KiB
C
685 lines
20 KiB
C
/* ====================================================================
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* Copyright (c) 1995-1999 The Apache Group. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the Apache Group
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* for use in the Apache HTTP server project (http://www.apache.org/)."
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*
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* 4. The names "Apache Server" and "Apache Group" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* apache@apache.org.
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*
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* 5. Products derived from this software may not be called "Apache"
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* nor may "Apache" appear in their names without prior written
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* permission of the Apache Group.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the Apache Group
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* for use in the Apache HTTP server project (http://www.apache.org/)."
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*
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* THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Group and was originally based
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* on public domain software written at the National Center for
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* Supercomputing Applications, University of Illinois, Urbana-Champaign.
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* For more information on the Apache Group and the Apache HTTP server
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* project, please see <http://www.apache.org/>.
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*
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*/
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#define CORE_PRIVATE
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#include "httpd.h"
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#include "http_config.h"
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#include "http_main.h"
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#include "http_log.h"
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#include "http_core.h"
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#include "http_protocol.h"
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#include "http_request.h" /* for sub_req_lookup_uri() */
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#include "util_script.h"
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#include "util_date.h" /* For parseHTTPdate() */
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#include <stdlib.h>
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#include <string.h>
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#ifdef OS2
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#define INCL_DOS
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#include <os2.h>
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#endif
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/*
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* Various utility functions which are common to a whole lot of
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* script-type extensions mechanisms, and might as well be gathered
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* in one place (if only to avoid creating inter-module dependancies
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* where there don't have to be).
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*/
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#define MALFORMED_MESSAGE "malformed header from script. Bad header="
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#define MALFORMED_HEADER_LENGTH_TO_SHOW 30
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#if defined(OS2) || defined(WIN32)
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/* If a request includes query info in the URL (stuff after "?"), and
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* the query info does not contain "=" (indicative of a FORM submission),
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* then this routine is called to create the argument list to be passed
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* to the CGI script. When suexec is enabled, the suexec path, user, and
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* group are the first three arguments to be passed; if not, all three
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* must be NULL. The query info is split into separate arguments, where
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* "+" is the separator between keyword arguments.
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*
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* XXXX: note that the WIN32 code uses one of the suexec strings
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* to pass an interpreter name. Remember this if changing the way they
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* are handled in create_argv.
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*
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*/
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static char **create_argv(ap_context_t *p, char *path, char *user, char *group,
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char *av0, const char *args)
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{
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int x, numwords;
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char **av;
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char *w;
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int idx = 0;
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/* count the number of keywords */
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for (x = 0, numwords = 1; args[x]; x++) {
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if (args[x] == '+') {
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++numwords;
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}
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}
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if (numwords > APACHE_ARG_MAX - 5) {
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numwords = APACHE_ARG_MAX - 5; /* Truncate args to prevent overrun */
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}
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av = (char **) ap_palloc(p, (numwords + 5) * sizeof(char *));
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if (path) {
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av[idx++] = path;
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}
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if (user) {
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av[idx++] = user;
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}
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if (group) {
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av[idx++] = group;
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}
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av[idx++] = av0;
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for (x = 1; x <= numwords; x++) {
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w = ap_getword_nulls(p, &args, '+');
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ap_unescape_url(w);
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av[idx++] = ap_escape_shell_cmd(p, w);
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}
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av[idx] = NULL;
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return av;
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}
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#endif /* defined(OS2) || defined(WIN32) */
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static char *http2env(ap_context_t *a, char *w)
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{
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char *res = ap_pstrcat(a, "HTTP_", w, NULL);
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char *cp = res;
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while (*++cp) {
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if (!ap_isalnum(*cp) && *cp != '_') {
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*cp = '_';
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}
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else {
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*cp = ap_toupper(*cp);
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}
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}
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return res;
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}
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API_EXPORT(char **) ap_create_environment(ap_context_t *p, ap_table_t *t)
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{
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ap_array_header_t *env_arr = ap_table_elts(t);
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ap_table_entry_t *elts = (ap_table_entry_t *) env_arr->elts;
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char **env = (char **) ap_palloc(p, (env_arr->nelts + 2) * sizeof(char *));
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int i, j;
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char *tz;
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char *whack;
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j = 0;
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if (!ap_table_get(t, "TZ")) {
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tz = getenv("TZ");
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if (tz != NULL) {
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env[j++] = ap_pstrcat(p, "TZ=", tz, NULL);
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}
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}
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for (i = 0; i < env_arr->nelts; ++i) {
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if (!elts[i].key) {
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continue;
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}
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env[j] = ap_pstrcat(p, elts[i].key, "=", elts[i].val, NULL);
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whack = env[j];
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if (ap_isdigit(*whack)) {
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*whack++ = '_';
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}
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while (*whack != '=') {
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if (!ap_isalnum(*whack) && *whack != '_') {
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*whack = '_';
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}
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++whack;
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}
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++j;
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}
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env[j] = NULL;
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return env;
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}
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API_EXPORT(void) ap_add_common_vars(request_rec *r)
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{
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ap_table_t *e;
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server_rec *s = r->server;
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conn_rec *c = r->connection;
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const char *rem_logname;
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char *env_path;
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#ifdef WIN32
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char *env_temp;
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#endif
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const char *host;
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ap_array_header_t *hdrs_arr = ap_table_elts(r->headers_in);
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ap_table_entry_t *hdrs = (ap_table_entry_t *) hdrs_arr->elts;
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int i;
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/* use a temporary ap_table_t which we'll overlap onto
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* r->subprocess_env later
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*/
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e = ap_make_table(r->pool, 25 + hdrs_arr->nelts);
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/* First, add environment vars from headers... this is as per
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* CGI specs, though other sorts of scripting interfaces see
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* the same vars...
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*/
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for (i = 0; i < hdrs_arr->nelts; ++i) {
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if (!hdrs[i].key) {
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continue;
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}
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/* A few headers are special cased --- Authorization to prevent
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* rogue scripts from capturing passwords; content-type and -length
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* for no particular reason.
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*/
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if (!strcasecmp(hdrs[i].key, "Content-type")) {
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ap_table_addn(e, "CONTENT_TYPE", hdrs[i].val);
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}
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else if (!strcasecmp(hdrs[i].key, "Content-length")) {
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ap_table_addn(e, "CONTENT_LENGTH", hdrs[i].val);
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}
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/*
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* You really don't want to disable this check, since it leaves you
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* wide open to CGIs stealing passwords and people viewing them
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* in the environment with "ps -e". But, if you must...
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*/
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#ifndef SECURITY_HOLE_PASS_AUTHORIZATION
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else if (!strcasecmp(hdrs[i].key, "Authorization")
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|| !strcasecmp(hdrs[i].key, "Proxy-Authorization")) {
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continue;
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}
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#endif
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else {
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ap_table_addn(e, http2env(r->pool, hdrs[i].key), hdrs[i].val);
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}
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}
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if (!(env_path = getenv("PATH"))) {
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env_path = DEFAULT_PATH;
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}
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#ifdef WIN32
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if (env_temp = getenv("SystemRoot")) {
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ap_table_addn(e, "SystemRoot", env_temp);
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}
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if (env_temp = getenv("COMSPEC")) {
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ap_table_addn(e, "COMSPEC", env_temp);
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}
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if (env_temp = getenv("WINDIR")) {
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ap_table_addn(e, "WINDIR", env_temp);
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}
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#endif
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ap_table_addn(e, "PATH", env_path);
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ap_table_addn(e, "SERVER_SIGNATURE", ap_psignature("", r));
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ap_table_addn(e, "SERVER_SOFTWARE", ap_get_server_version());
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ap_table_addn(e, "SERVER_NAME", ap_get_server_name(r));
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ap_table_addn(e, "SERVER_ADDR", r->connection->local_ip); /* Apache */
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ap_table_addn(e, "SERVER_PORT",
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ap_psprintf(r->pool, "%u", ap_get_server_port(r)));
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host = ap_get_remote_host(c, r->per_dir_config, REMOTE_HOST);
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if (host) {
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ap_table_addn(e, "REMOTE_HOST", host);
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}
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ap_table_addn(e, "REMOTE_ADDR", c->remote_ip);
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ap_table_addn(e, "DOCUMENT_ROOT", ap_document_root(r)); /* Apache */
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ap_table_addn(e, "SERVER_ADMIN", s->server_admin); /* Apache */
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ap_table_addn(e, "SCRIPT_FILENAME", r->filename); /* Apache */
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ap_table_addn(e, "REMOTE_PORT",
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ap_psprintf(r->pool, "%d", ntohs(c->remote_addr.sin_port)));
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if (r->user) {
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ap_table_addn(e, "REMOTE_USER", r->user);
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}
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if (r->ap_auth_type) {
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ap_table_addn(e, "AUTH_TYPE", r->ap_auth_type);
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}
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rem_logname = ap_get_remote_logname(r);
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if (rem_logname) {
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ap_table_addn(e, "REMOTE_IDENT", ap_pstrdup(r->pool, rem_logname));
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}
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/* Apache custom error responses. If we have redirected set two new vars */
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if (r->prev) {
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if (r->prev->args) {
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ap_table_addn(e, "REDIRECT_QUERY_STRING", r->prev->args);
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}
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if (r->prev->uri) {
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ap_table_addn(e, "REDIRECT_URL", r->prev->uri);
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}
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}
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ap_overlap_tables(r->subprocess_env, e, AP_OVERLAP_TABLES_SET);
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}
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/* This "cute" little function comes about because the path info on
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* filenames and URLs aren't always the same. So we take the two,
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* and find as much of the two that match as possible.
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*/
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API_EXPORT(int) ap_find_path_info(const char *uri, const char *path_info)
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{
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int lu = strlen(uri);
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int lp = strlen(path_info);
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while (lu-- && lp-- && uri[lu] == path_info[lp]);
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if (lu == -1) {
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lu = 0;
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}
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while (uri[lu] != '\0' && uri[lu] != '/') {
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lu++;
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}
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return lu;
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}
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/* Obtain the Request-URI from the original request-line, returning
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* a new string from the request pool containing the URI or "".
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*/
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static char *original_uri(request_rec *r)
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{
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char *first, *last;
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if (r->the_request == NULL) {
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return (char *) ap_pcalloc(r->pool, 1);
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}
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first = r->the_request; /* use the request-line */
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while (*first && !ap_isspace(*first)) {
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++first; /* skip over the method */
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}
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while (ap_isspace(*first)) {
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++first; /* and the space(s) */
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}
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last = first;
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while (*last && !ap_isspace(*last)) {
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++last; /* end at next whitespace */
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}
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return ap_pstrndup(r->pool, first, last - first);
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}
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API_EXPORT(void) ap_add_cgi_vars(request_rec *r)
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{
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ap_table_t *e = r->subprocess_env;
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ap_table_setn(e, "GATEWAY_INTERFACE", "CGI/1.1");
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ap_table_setn(e, "SERVER_PROTOCOL", r->protocol);
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ap_table_setn(e, "REQUEST_METHOD", r->method);
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ap_table_setn(e, "QUERY_STRING", r->args ? r->args : "");
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ap_table_setn(e, "REQUEST_URI", original_uri(r));
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/* Note that the code below special-cases scripts run from includes,
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* because it "knows" that the sub_request has been hacked to have the
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* args and path_info of the original request, and not any that may have
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* come with the script URI in the include command. Ugh.
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*/
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if (!strcmp(r->protocol, "INCLUDED")) {
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ap_table_setn(e, "SCRIPT_NAME", r->uri);
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if (r->path_info && *r->path_info) {
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ap_table_setn(e, "PATH_INFO", r->path_info);
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}
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}
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else if (!r->path_info || !*r->path_info) {
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ap_table_setn(e, "SCRIPT_NAME", r->uri);
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}
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else {
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int path_info_start = ap_find_path_info(r->uri, r->path_info);
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ap_table_setn(e, "SCRIPT_NAME",
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ap_pstrndup(r->pool, r->uri, path_info_start));
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ap_table_setn(e, "PATH_INFO", r->path_info);
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}
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if (r->path_info && r->path_info[0]) {
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/*
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* To get PATH_TRANSLATED, treat PATH_INFO as a URI path.
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* Need to re-escape it for this, since the entire URI was
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* un-escaped before we determined where the PATH_INFO began.
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*/
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request_rec *pa_req;
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pa_req = ap_sub_req_lookup_uri(ap_escape_uri(r->pool, r->path_info), r);
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if (pa_req->filename) {
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#ifdef WIN32
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char buffer[HUGE_STRING_LEN];
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#endif
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char *pt = ap_pstrcat(r->pool, pa_req->filename, pa_req->path_info,
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NULL);
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#ifdef WIN32
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/* We need to make this a real Windows path name */
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GetFullPathName(pt, HUGE_STRING_LEN, buffer, NULL);
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ap_table_setn(e, "PATH_TRANSLATED", ap_pstrdup(r->pool, buffer));
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#else
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ap_table_setn(e, "PATH_TRANSLATED", pt);
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#endif
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}
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ap_destroy_sub_req(pa_req);
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}
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}
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static int set_cookie_doo_doo(void *v, const char *key, const char *val)
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{
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ap_table_addn(v, key, val);
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return 1;
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}
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API_EXPORT(int) ap_scan_script_header_err_core(request_rec *r, char *buffer,
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int (*getsfunc) (char *, int, void *),
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void *getsfunc_data)
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{
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char x[MAX_STRING_LEN];
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char *w, *l;
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int p;
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int cgi_status = HTTP_OK;
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ap_table_t *merge;
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ap_table_t *cookie_table;
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if (buffer) {
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*buffer = '\0';
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}
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w = buffer ? buffer : x;
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/* temporary place to hold headers to merge in later */
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merge = ap_make_table(r->pool, 10);
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/* The HTTP specification says that it is legal to merge duplicate
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* headers into one. Some browsers that support Cookies don't like
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* merged headers and prefer that each Set-Cookie header is sent
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* separately. Lets humour those browsers by not merging.
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* Oh what a pain it is.
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*/
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cookie_table = ap_make_table(r->pool, 2);
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ap_table_do(set_cookie_doo_doo, cookie_table, r->err_headers_out, "Set-Cookie", NULL);
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while (1) {
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if ((*getsfunc) (w, MAX_STRING_LEN - 1, getsfunc_data) == 0) {
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ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, r,
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"Premature end of script headers: %s", r->filename);
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return HTTP_INTERNAL_SERVER_ERROR;
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}
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/* Delete terminal (CR?)LF */
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p = strlen(w);
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if (p > 0 && w[p - 1] == '\n') {
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if (p > 1 && w[p - 2] == '\015') {
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w[p - 2] = '\0';
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}
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else {
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w[p - 1] = '\0';
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}
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|
}
|
|
|
|
/*
|
|
* If we've finished reading the headers, check to make sure any
|
|
* HTTP/1.1 conditions are met. If so, we're done; normal processing
|
|
* will handle the script's output. If not, just return the error.
|
|
* The appropriate thing to do would be to send the script process a
|
|
* SIGPIPE to let it know we're ignoring it, close the channel to the
|
|
* script process, and *then* return the failed-to-meet-condition
|
|
* error. Otherwise we'd be waiting for the script to finish
|
|
* blithering before telling the client the output was no good.
|
|
* However, we don't have the information to do that, so we have to
|
|
* leave it to an upper layer.
|
|
*/
|
|
if (w[0] == '\0') {
|
|
int cond_status = OK;
|
|
|
|
if ((cgi_status == HTTP_OK) && (r->method_number == M_GET)) {
|
|
cond_status = ap_meets_conditions(r);
|
|
}
|
|
ap_overlap_tables(r->err_headers_out, merge,
|
|
AP_OVERLAP_TABLES_MERGE);
|
|
if (!ap_is_empty_table(cookie_table)) {
|
|
/* the cookies have already been copied to the cookie_table */
|
|
ap_table_unset(r->err_headers_out, "Set-Cookie");
|
|
r->err_headers_out = ap_overlay_tables(r->pool,
|
|
r->err_headers_out, cookie_table);
|
|
}
|
|
return cond_status;
|
|
}
|
|
|
|
/* if we see a bogus header don't ignore it. Shout and scream */
|
|
|
|
#ifdef CHARSET_EBCDIC
|
|
/* Chances are that we received an ASCII header text instead of
|
|
* the expected EBCDIC header lines. Try to auto-detect:
|
|
*/
|
|
if (!(l = strchr(w, ':'))) {
|
|
int maybeASCII = 0, maybeEBCDIC = 0;
|
|
char *cp;
|
|
|
|
for (cp = w; *cp != '\0'; ++cp) {
|
|
if (isprint(*cp) && !isprint(os_toebcdic[*cp]))
|
|
++maybeEBCDIC;
|
|
if (!isprint(*cp) && isprint(os_toebcdic[*cp]))
|
|
++maybeASCII;
|
|
}
|
|
if (maybeASCII > maybeEBCDIC) {
|
|
ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r->server,
|
|
"CGI Interface Error: Script headers apparently ASCII: (CGI = %s)", r->filename);
|
|
ascii2ebcdic(w, w, cp - w);
|
|
}
|
|
}
|
|
#endif
|
|
if (!(l = strchr(w, ':'))) {
|
|
char malformed[(sizeof MALFORMED_MESSAGE) + 1
|
|
+ MALFORMED_HEADER_LENGTH_TO_SHOW];
|
|
|
|
strcpy(malformed, MALFORMED_MESSAGE);
|
|
strncat(malformed, w, MALFORMED_HEADER_LENGTH_TO_SHOW);
|
|
|
|
if (!buffer) {
|
|
/* Soak up all the script output - may save an outright kill */
|
|
while ((*getsfunc) (w, MAX_STRING_LEN - 1, getsfunc_data)) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, r,
|
|
"%s: %s", malformed, r->filename);
|
|
return HTTP_INTERNAL_SERVER_ERROR;
|
|
}
|
|
|
|
*l++ = '\0';
|
|
while (*l && ap_isspace(*l)) {
|
|
++l;
|
|
}
|
|
|
|
if (!strcasecmp(w, "Content-type")) {
|
|
char *tmp;
|
|
|
|
/* Nuke trailing whitespace */
|
|
|
|
char *endp = l + strlen(l) - 1;
|
|
while (endp > l && ap_isspace(*endp)) {
|
|
*endp-- = '\0';
|
|
}
|
|
|
|
tmp = ap_pstrdup(r->pool, l);
|
|
ap_content_type_tolower(tmp);
|
|
r->content_type = tmp;
|
|
}
|
|
/*
|
|
* If the script returned a specific status, that's what
|
|
* we'll use - otherwise we assume 200 OK.
|
|
*/
|
|
else if (!strcasecmp(w, "Status")) {
|
|
r->status = cgi_status = atoi(l);
|
|
r->status_line = ap_pstrdup(r->pool, l);
|
|
}
|
|
else if (!strcasecmp(w, "Location")) {
|
|
ap_table_set(r->headers_out, w, l);
|
|
}
|
|
else if (!strcasecmp(w, "Content-Length")) {
|
|
ap_table_set(r->headers_out, w, l);
|
|
}
|
|
else if (!strcasecmp(w, "Transfer-Encoding")) {
|
|
ap_table_set(r->headers_out, w, l);
|
|
}
|
|
/*
|
|
* If the script gave us a Last-Modified header, we can't just
|
|
* pass it on blindly because of restrictions on future values.
|
|
*/
|
|
else if (!strcasecmp(w, "Last-Modified")) {
|
|
ap_update_mtime(r, ap_parseHTTPdate(l));
|
|
ap_set_last_modified(r);
|
|
}
|
|
else if (!strcasecmp(w, "Set-Cookie")) {
|
|
ap_table_add(cookie_table, w, l);
|
|
}
|
|
else {
|
|
ap_table_add(merge, w, l);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int getsfunc_FILE(char *buf, int len, void *f)
|
|
{
|
|
return ap_fgets(buf, len, (ap_file_t *) f) == APR_SUCCESS;
|
|
}
|
|
|
|
API_EXPORT(int) ap_scan_script_header_err(request_rec *r, ap_file_t *f,
|
|
char *buffer)
|
|
{
|
|
return ap_scan_script_header_err_core(r, buffer, getsfunc_FILE, f);
|
|
}
|
|
|
|
static int getsfunc_BUFF(char *w, int len, void *fb)
|
|
{
|
|
return ap_bgets(w, len, (BUFF *) fb) > 0;
|
|
}
|
|
|
|
API_EXPORT(int) ap_scan_script_header_err_buff(request_rec *r, BUFF *fb,
|
|
char *buffer)
|
|
{
|
|
return ap_scan_script_header_err_core(r, buffer, getsfunc_BUFF, fb);
|
|
}
|
|
|
|
|
|
API_EXPORT(void) ap_send_size(ap_ssize_t size, request_rec *r)
|
|
{
|
|
/* XXX: this -1 thing is a gross hack */
|
|
if (size == (ap_ssize_t)-1) {
|
|
ap_rputs(" -", r);
|
|
}
|
|
else if (!size) {
|
|
ap_rputs(" 0k", r);
|
|
}
|
|
else if (size < 1024) {
|
|
ap_rputs(" 1k", r);
|
|
}
|
|
else if (size < 1048576) {
|
|
ap_rprintf(r, "%4" APR_SSIZE_T_FMT "k", (size + 512) / 1024);
|
|
}
|
|
else if (size < 103809024) {
|
|
ap_rprintf(r, "%4.1fM", size / 1048576.0);
|
|
}
|
|
else {
|
|
ap_rprintf(r, "%4" APR_SSIZE_T_FMT "M", (size + 524288) / 1048576);
|
|
}
|
|
}
|
|
|
|
#if defined(OS2) || defined(WIN32)
|
|
static char **create_argv_cmd(ap_context_t *p, char *av0, const char *args, char *path)
|
|
{
|
|
register int x, n;
|
|
char **av;
|
|
char *w;
|
|
|
|
for (x = 0, n = 2; args[x]; x++) {
|
|
if (args[x] == '+') {
|
|
++n;
|
|
}
|
|
}
|
|
|
|
/* Add extra strings to array. */
|
|
n = n + 2;
|
|
|
|
av = (char **) ap_palloc(p, (n + 1) * sizeof(char *));
|
|
av[0] = av0;
|
|
|
|
/* Now insert the extra strings we made room for above. */
|
|
av[1] = strdup("/C");
|
|
av[2] = strdup(path);
|
|
|
|
for (x = (1 + 2); x < n; x++) {
|
|
w = ap_getword(p, &args, '+');
|
|
ap_unescape_url(w);
|
|
av[x] = ap_escape_shell_cmd(p, w);
|
|
}
|
|
av[n] = NULL;
|
|
return av;
|
|
}
|
|
#endif
|
|
|