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-
- /* ====================================================================
- * Copyright (c) 1995 The Apache Group. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * 4. The names "Apache Server" and "Apache Group" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission.
- *
- * 5. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Group and was originally based
- * on public domain software written at the National Center for
- * Supercomputing Applications, University of Illinois, Urbana-Champaign.
- * For more information on the Apache Group and the Apache HTTP server
- * project, please see <http://www.apache.org/>.
- *
- */
-
-
- /*
- * http_script: keeps all script-related ramblings together.
- *
- * Compliant to CGI/1.1 spec
- *
- * Adapted by rst from original NCSA code by Rob McCool
- *
- * Apache adds some new env vars; REDIRECT_URL and REDIRECT_QUERY_STRING for
- * custom error responses, and DOCUMENT_ROOT because we found it useful.
- * It also adds SERVER_ADMIN - useful for scripts to know who to mail when
- * they fail.
- */
-
- #include "httpd.h"
- #include "http_config.h"
- #include "http_request.h"
- #include "http_core.h"
- #include "http_protocol.h"
- #include "http_main.h"
- #include "http_log.h"
- #include "util_script.h"
-
- /* KLUDGE --- for back-combatibility, we don't have to check ExecCGI
- * in ScriptAliased directories, which means we need to know if this
- * request came through ScriptAlias or not... so the Alias module
- * leaves a note for us.
- */
-
- int is_scriptaliased (request_rec *r)
- {
- char *t = table_get (r->notes, "alias-forced-type");
- return t && (!strcmp (t, "cgi-script"));
- }
-
- /****************************************************************
- *
- * Actual CGI handling...
- */
-
-
- struct cgi_child_stuff {
- request_rec *r;
- int nph;
- char *argv0;
- };
-
- void cgi_child (void *child_stuff)
- {
- struct cgi_child_stuff *cld = (struct cgi_child_stuff *)child_stuff;
- request_rec *r = cld->r;
- char *argv0 = cld->argv0;
- int nph = cld->nph;
-
- #ifdef DEBUG_CGI
- #ifdef __EMX__
- /* Under OS/2 need to use device con. */
- FILE *dbg = fopen ("con", "w");
- #else
- FILE *dbg = fopen ("/dev/tty", "w");
- #endif
- int i;
- #endif
-
- char **env;
- char err_string[HUGE_STRING_LEN];
-
- #ifdef DEBUG_CGI
- fprintf (dbg, "Attempting to exec %s as %sCGI child (argv0 = %s)\n",
- r->filename, nph ? "NPH " : "", argv0);
- #endif
-
- add_cgi_vars (r);
- env = create_environment (r->pool, r->subprocess_env);
-
- #ifdef DEBUG_CGI
- fprintf (dbg, "Environment: \n");
- for (i = 0; env[i]; ++i) fprintf (dbg, "'%s'\n", env[i]);
- #endif
-
- chdir_file (r->filename);
- error_log2stderr (r->server);
-
- #ifndef __EMX__
- if (nph) client_to_stdout (r->connection);
- #endif
-
- /* Transumute outselves into the script.
- * NB only ISINDEX scripts get decoded arguments.
- */
-
- cleanup_for_exec();
-
- #ifdef __EMX__
- if((!r->args) || (!r->args[0]) || (ind(r->args,'=') >= 0)) {
- int emxloop;
- char *emxtemp;
-
- /* For OS/2 place the variables in the current
- enviornment then it will be inherited. This way
- the program will also get all of OS/2's other SETs. */
- for (emxloop=0; ((emxtemp = env[emxloop]) != NULL); emxloop++)
- putenv(emxtemp);
-
- if (strstr(strupr(r->filename), ".CMD") > 0) {
- /* Special case to allow use of REXX commands as scripts. */
- os2pathname(r->filename);
- execl("CMD.EXE", "CMD.EXE", "/C", r->filename, NULL);
- } else {
- execl(r->filename, argv0, NULL);
- }
- } else {
- int emxloop;
- char *emxtemp;
-
- /* For OS/2 place the variables in the current
- enviornment then it will be inherited. This way
- the program will also get all of OS/2's other SETs. */
- for (emxloop=0; ((emxtemp = env[emxloop]) != NULL); emxloop++)
- putenv(emxtemp);
-
- if (strstr(strupr(r->filename), ".CMD") > 0) {
- /* Special case to allow use of REXX commands as scripts. */
- os2pathname(r->filename);
- execv("CMD.EXE", create_argv_cmd(r->pool, argv0, r->args, r->filename));
- } else {
- execv(r->filename, create_argv(r->pool, argv0, r->args));
- }
- }
- #else
- if((!r->args) || (!r->args[0]) || (ind(r->args,'=') >= 0))
- execle(r->filename, argv0, NULL, env);
- else
- execve(r->filename, create_argv(r->pool, argv0, r->args), env);
- #endif
-
- /* Uh oh. Still here. Where's the kaboom? There was supposed to be an
- * EARTH-shattering kaboom!
- *
- * Oh, well. Muddle through as best we can...
- *
- * (NB we can't use log_error, or anything like that, because we
- * just closed the file descriptor which r->server->error_log
- * was tied to in cleanup_for_exec(). It's only available on stderr
- * now, so that's what we use).
- */
-
- sprintf(err_string,
- "exec of %s failed, errno is %d\n", r->filename, errno);
- write(2, err_string, strlen(err_string));
- exit(0);
- }
-
- int cgi_handler (request_rec *r)
- {
- int nph;
- char *argv0;
- FILE *script_out, *script_in;
- char argsbuffer[HUGE_STRING_LEN];
- int is_included = !strcmp (r->protocol, "INCLUDED");
- char *lenp = table_get (r->headers_in, "Content-length");
-
- struct cgi_child_stuff cld;
-
- if((argv0 = strrchr(r->filename,'/')) != NULL)
- argv0++;
- else argv0 = r->filename;
-
- nph = !(strncmp(argv0,"nph-",4));
-
- if (!(allow_options (r) & OPT_EXECCGI) && !is_scriptaliased (r)) {
- log_reason("Options ExecCGI is off in this directory", r->filename, r);
- return FORBIDDEN;
- }
- if (nph && is_included) {
- log_reason("attempt to include NPH CGI script", r->filename, r);
- return FORBIDDEN;
- }
-
- if (S_ISDIR(r->finfo.st_mode)) {
- log_reason("attempt to invoke directory as script", r->filename, r);
- return FORBIDDEN;
- }
- if (r->finfo.st_mode == 0) {
- log_reason("script not found or unable to stat", r->filename, r);
- return NOT_FOUND;
- }
- if(!can_exec(&r->finfo)) {
- log_reason("file permissions deny server execution", r->filename, r);
- return FORBIDDEN;
- }
- if ((r->method_number == M_POST || r->method_number == M_PUT)
- && !lenp) {
- log_reason("POST or PUT without Content-length:", r->filename, r);
- return BAD_REQUEST;
- }
-
- add_common_vars (r);
- cld.argv0 = argv0; cld.r = r; cld.nph = nph;
-
- if (!spawn_child (r->connection->pool, cgi_child, (void *)&cld,
- nph ? just_wait : kill_after_timeout,
- #ifdef __EMX__
- &script_out, &script_in)) {
- #else
- &script_out, nph ? NULL : &script_in)) {
- #endif
- log_reason ("couldn't spawn child process", r->filename, r);
- return SERVER_ERROR;
- }
-
- /* Transfer any put/post args, CERN style...
- * Note that if a buggy script fails to read everything we throw
- * at it, or a buggy client sends too much, we get a SIGPIPE, so
- * we have to ignore SIGPIPE while doing this. CERN does the same
- * (and in fact, they pretty nearly guarantee themselves a SIGPIPE
- * on every invocation by chasing the real client data with a
- * spurious newline).
- */
-
- if (r->method_number == M_POST || r->method_number == M_PUT) {
- void (*handler)();
- int remaining = atoi (lenp);
-
- hard_timeout ("copy script args", r);
- handler = signal (SIGPIPE, SIG_IGN);
-
- while ((remaining > 0))
- {
- int len_read, len_to_read = remaining;
-
- if (len_to_read > HUGE_STRING_LEN) len_to_read = HUGE_STRING_LEN;
-
- len_read = read_client_block (r, argsbuffer, len_to_read);
- if (len_read == 0)
- break;
- if (fwrite (argsbuffer, 1, len_read, script_out) == 0)
- break;
- remaining -= len_read;
- }
-
- /* If script stopped reading early, soak up remaining stuff from
- * client...
- */
-
- while (remaining > 0) {
- int len_read, len_to_read = remaining;
- if (len_to_read > HUGE_STRING_LEN) len_to_read = HUGE_STRING_LEN;
-
- len_read = read_client_block (r, argsbuffer, len_to_read);
- if (len_read == 0) break;
- }
-
- fflush (script_out);
- signal (SIGPIPE, handler);
-
- kill_timeout (r);
- }
-
- pfclose (r->connection->pool, script_out);
-
- /* Handle script return... */
- if (script_in && !nph) {
- char *location;
- int ret;
-
- if ((ret = scan_script_header(r, script_in)))
- return ret;
-
- location = table_get (r->headers_out, "Location");
-
- if (location && location[0] == '/' && r->status == 200) {
-
- /* Soak up all the script output */
- hard_timeout ("read from script", r);
- while (fgets(argsbuffer, HUGE_STRING_LEN-1, script_in) != NULL)
- continue;
- kill_timeout (r);
-
-
- /* This redirect needs to be a GET no matter what the original
- * method was.
- */
- r->method = pstrdup(r->pool, "GET");
- r->method_number = M_GET;
-
- internal_redirect_handler (location, r);
- return OK;
- }
- else if (location && r->status == 200) {
- /* XX Note that if a script wants to produce its own Redirect
- * body, it now has to explicitly *say* "Status: 302"
- */
- return REDIRECT;
- }
-
- hard_timeout ("send script output", r);
- send_http_header(r);
- if(!r->header_only) send_fd (script_in, r);
- kill_timeout (r);
- pfclose (r->connection->pool, script_in);
- }
-
- #ifdef __EMX__
- if (nph) {
- while (fgets(argsbuffer, HUGE_STRING_LEN-1, script_in) != NULL) {
- bputs(argsbuffer, r->connection->client);
- }
- }
- #endif
-
- return OK; /* NOT r->status, even if it has changed. */
- }
-
- handler_rec cgi_handlers[] = {
- { CGI_MAGIC_TYPE, cgi_handler },
- { "cgi-script", cgi_handler },
- { NULL }
- };
-
- module cgi_module = {
- STANDARD_MODULE_STUFF,
- NULL, /* initializer */
- NULL, /* dir config creater */
- NULL, /* dir merger --- default is to override */
- NULL, /* server config */
- NULL, /* merge server config */
- NULL, /* command table */
- cgi_handlers, /* handlers */
- NULL, /* filename translation */
- NULL, /* check_user_id */
- NULL, /* check auth */
- NULL, /* check access */
- NULL, /* type_checker */
- NULL, /* fixups */
- NULL /* logger */
- };
-