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Apache 1.3.9 baseline for the Apache 2.0 repository.
Obtained from: Apache 1.3.9 (minus unused files), tag APACHE_1_3_9 Submitted by: Apache Group git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@83751 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Roy T. Fielding
609
modules/generators/mod_cgi.c
Normal file
609
modules/generators/mod_cgi.c
Normal file
@@ -0,0 +1,609 @@
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/* ====================================================================
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* Copyright (c) 1995-1999 The Apache Group. All rights reserved.
|
||||
*
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||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
*
|
||||
* 3. All advertising materials mentioning features or use of this
|
||||
* software must display the following acknowledgment:
|
||||
* "This product includes software developed by the Apache Group
|
||||
* for use in the Apache HTTP server project (http://www.apache.org/)."
|
||||
*
|
||||
* 4. The names "Apache Server" and "Apache Group" must not be used to
|
||||
* endorse or promote products derived from this software without
|
||||
* prior written permission. For written permission, please contact
|
||||
* apache@apache.org.
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||||
*
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||||
* 5. Products derived from this software may not be called "Apache"
|
||||
* nor may "Apache" appear in their names without prior written
|
||||
* permission of the Apache Group.
|
||||
*
|
||||
* 6. Redistributions of any form whatsoever must retain the following
|
||||
* acknowledgment:
|
||||
* "This product includes software developed by the Apache Group
|
||||
* for use in the Apache HTTP server project (http://www.apache.org/)."
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
|
||||
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
|
||||
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||||
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
||||
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
||||
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
* ====================================================================
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||||
*
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||||
* 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.
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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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/*
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* http_script: keeps all script-related ramblings together.
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*
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* Compliant to CGI/1.1 spec
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*
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* Adapted by rst from original NCSA code by Rob McCool
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*
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* Apache adds some new env vars; REDIRECT_URL and REDIRECT_QUERY_STRING for
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* custom error responses, and DOCUMENT_ROOT because we found it useful.
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* It also adds SERVER_ADMIN - useful for scripts to know who to mail when
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* they fail.
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*/
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#include "httpd.h"
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#include "http_config.h"
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#include "http_request.h"
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#include "http_core.h"
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#include "http_protocol.h"
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#include "http_main.h"
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#include "http_log.h"
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#include "util_script.h"
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#include "http_conf_globals.h"
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module MODULE_VAR_EXPORT cgi_module;
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/* KLUDGE --- for back-combatibility, we don't have to check ExecCGI
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* in ScriptAliased directories, which means we need to know if this
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* request came through ScriptAlias or not... so the Alias module
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* leaves a note for us.
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*/
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static int is_scriptaliased(request_rec *r)
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{
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const char *t = ap_table_get(r->notes, "alias-forced-type");
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return t && (!strcasecmp(t, "cgi-script"));
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}
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/* Configuration stuff */
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#define DEFAULT_LOGBYTES 10385760
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#define DEFAULT_BUFBYTES 1024
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typedef struct {
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char *logname;
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long logbytes;
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int bufbytes;
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} cgi_server_conf;
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static void *create_cgi_config(pool *p, server_rec *s)
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{
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cgi_server_conf *c =
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(cgi_server_conf *) ap_pcalloc(p, sizeof(cgi_server_conf));
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c->logname = NULL;
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c->logbytes = DEFAULT_LOGBYTES;
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c->bufbytes = DEFAULT_BUFBYTES;
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return c;
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}
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static void *merge_cgi_config(pool *p, void *basev, void *overridesv)
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{
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cgi_server_conf *base = (cgi_server_conf *) basev, *overrides = (cgi_server_conf *) overridesv;
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return overrides->logname ? overrides : base;
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}
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static const char *set_scriptlog(cmd_parms *cmd, void *dummy, char *arg)
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{
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server_rec *s = cmd->server;
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cgi_server_conf *conf =
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(cgi_server_conf *) ap_get_module_config(s->module_config, &cgi_module);
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conf->logname = arg;
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return NULL;
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}
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static const char *set_scriptlog_length(cmd_parms *cmd, void *dummy, char *arg)
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{
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server_rec *s = cmd->server;
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cgi_server_conf *conf =
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(cgi_server_conf *) ap_get_module_config(s->module_config, &cgi_module);
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conf->logbytes = atol(arg);
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return NULL;
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}
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static const char *set_scriptlog_buffer(cmd_parms *cmd, void *dummy, char *arg)
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{
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server_rec *s = cmd->server;
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cgi_server_conf *conf =
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(cgi_server_conf *) ap_get_module_config(s->module_config, &cgi_module);
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conf->bufbytes = atoi(arg);
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return NULL;
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}
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static const command_rec cgi_cmds[] =
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{
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{"ScriptLog", set_scriptlog, NULL, RSRC_CONF, TAKE1,
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"the name of a log for script debugging info"},
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{"ScriptLogLength", set_scriptlog_length, NULL, RSRC_CONF, TAKE1,
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"the maximum length (in bytes) of the script debug log"},
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{"ScriptLogBuffer", set_scriptlog_buffer, NULL, RSRC_CONF, TAKE1,
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"the maximum size (in bytes) to record of a POST request"},
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{NULL}
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};
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static int log_scripterror(request_rec *r, cgi_server_conf * conf, int ret,
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int show_errno, char *error)
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{
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FILE *f;
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struct stat finfo;
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ap_log_rerror(APLOG_MARK, show_errno|APLOG_ERR, r,
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"%s: %s", error, r->filename);
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if (!conf->logname ||
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((stat(ap_server_root_relative(r->pool, conf->logname), &finfo) == 0)
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&& (finfo.st_size > conf->logbytes)) ||
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((f = ap_pfopen(r->pool, ap_server_root_relative(r->pool, conf->logname),
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"a")) == NULL)) {
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return ret;
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}
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/* "%% [Wed Jun 19 10:53:21 1996] GET /cgi-bin/printenv HTTP/1.0" */
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fprintf(f, "%%%% [%s] %s %s%s%s %s\n", ap_get_time(), r->method, r->uri,
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r->args ? "?" : "", r->args ? r->args : "", r->protocol);
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/* "%% 500 /usr/local/apache/cgi-bin */
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fprintf(f, "%%%% %d %s\n", ret, r->filename);
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fprintf(f, "%%error\n%s\n", error);
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ap_pfclose(r->pool, f);
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return ret;
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}
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static int log_script(request_rec *r, cgi_server_conf * conf, int ret,
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char *dbuf, const char *sbuf, BUFF *script_in, BUFF *script_err)
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{
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array_header *hdrs_arr = ap_table_elts(r->headers_in);
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table_entry *hdrs = (table_entry *) hdrs_arr->elts;
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char argsbuffer[HUGE_STRING_LEN];
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FILE *f;
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int i;
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struct stat finfo;
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if (!conf->logname ||
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((stat(ap_server_root_relative(r->pool, conf->logname), &finfo) == 0)
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&& (finfo.st_size > conf->logbytes)) ||
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((f = ap_pfopen(r->pool, ap_server_root_relative(r->pool, conf->logname),
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"a")) == NULL)) {
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/* Soak up script output */
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while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_in) > 0)
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continue;
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#ifdef WIN32
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/* Soak up stderr and redirect it to the error log.
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* Script output to stderr is already directed to the error log
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* on Unix, thanks to the magic of fork().
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*/
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while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0) {
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ap_log_rerror(APLOG_MARK, APLOG_ERR | APLOG_NOERRNO, r,
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"%s", argsbuffer);
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}
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#else
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while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0)
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continue;
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#endif
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return ret;
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}
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/* "%% [Wed Jun 19 10:53:21 1996] GET /cgi-bin/printenv HTTP/1.0" */
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fprintf(f, "%%%% [%s] %s %s%s%s %s\n", ap_get_time(), r->method, r->uri,
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r->args ? "?" : "", r->args ? r->args : "", r->protocol);
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/* "%% 500 /usr/local/apache/cgi-bin" */
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fprintf(f, "%%%% %d %s\n", ret, r->filename);
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fputs("%request\n", f);
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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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fprintf(f, "%s: %s\n", hdrs[i].key, hdrs[i].val);
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}
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if ((r->method_number == M_POST || r->method_number == M_PUT)
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&& *dbuf) {
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fprintf(f, "\n%s\n", dbuf);
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}
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fputs("%response\n", f);
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hdrs_arr = ap_table_elts(r->err_headers_out);
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hdrs = (table_entry *) hdrs_arr->elts;
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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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fprintf(f, "%s: %s\n", hdrs[i].key, hdrs[i].val);
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}
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if (sbuf && *sbuf)
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fprintf(f, "%s\n", sbuf);
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if (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_in) > 0) {
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fputs("%stdout\n", f);
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fputs(argsbuffer, f);
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while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_in) > 0)
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fputs(argsbuffer, f);
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fputs("\n", f);
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}
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if (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0) {
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fputs("%stderr\n", f);
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fputs(argsbuffer, f);
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while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0)
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fputs(argsbuffer, f);
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fputs("\n", f);
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}
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ap_bclose(script_in);
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ap_bclose(script_err);
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ap_pfclose(r->pool, f);
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return ret;
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}
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/****************************************************************
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*
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* Actual CGI handling...
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*/
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struct cgi_child_stuff {
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#ifdef TPF
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TPF_FORK_CHILD t;
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#endif
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request_rec *r;
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int nph;
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int debug;
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char *argv0;
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};
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static int cgi_child(void *child_stuff, child_info *pinfo)
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{
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struct cgi_child_stuff *cld = (struct cgi_child_stuff *) child_stuff;
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request_rec *r = cld->r;
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char *argv0 = cld->argv0;
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int child_pid;
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#ifdef DEBUG_CGI
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#ifdef OS2
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/* Under OS/2 need to use device con. */
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FILE *dbg = fopen("con", "w");
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#else
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FILE *dbg = fopen("/dev/tty", "w");
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#endif
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int i;
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||||
#endif
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char **env;
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||||
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RAISE_SIGSTOP(CGI_CHILD);
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#ifdef DEBUG_CGI
|
||||
fprintf(dbg, "Attempting to exec %s as %sCGI child (argv0 = %s)\n",
|
||||
r->filename, cld->nph ? "NPH " : "", argv0);
|
||||
#endif
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|
||||
ap_add_cgi_vars(r);
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env = ap_create_environment(r->pool, r->subprocess_env);
|
||||
|
||||
#ifdef DEBUG_CGI
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fprintf(dbg, "Environment: \n");
|
||||
for (i = 0; env[i]; ++i)
|
||||
fprintf(dbg, "'%s'\n", env[i]);
|
||||
#endif
|
||||
|
||||
#ifndef WIN32
|
||||
ap_chdir_file(r->filename);
|
||||
#endif
|
||||
if (!cld->debug)
|
||||
ap_error_log2stderr(r->server);
|
||||
|
||||
/* Transumute outselves into the script.
|
||||
* NB only ISINDEX scripts get decoded arguments.
|
||||
*/
|
||||
|
||||
#ifdef TPF
|
||||
return (0);
|
||||
#else
|
||||
ap_cleanup_for_exec();
|
||||
|
||||
child_pid = ap_call_exec(r, pinfo, argv0, env, 0);
|
||||
#if defined(WIN32) || defined(OS2)
|
||||
return (child_pid);
|
||||
#else
|
||||
|
||||
/* 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...
|
||||
*
|
||||
* Note that only stderr is available at this point, so don't pass in
|
||||
* a server to aplog_error.
|
||||
*/
|
||||
|
||||
ap_log_error(APLOG_MARK, APLOG_ERR, NULL, "exec of %s failed", r->filename);
|
||||
exit(0);
|
||||
/* NOT REACHED */
|
||||
return (0);
|
||||
#endif
|
||||
#endif /* TPF */
|
||||
}
|
||||
|
||||
static int cgi_handler(request_rec *r)
|
||||
{
|
||||
int retval, nph, dbpos = 0;
|
||||
char *argv0, *dbuf = NULL;
|
||||
BUFF *script_out, *script_in, *script_err;
|
||||
char argsbuffer[HUGE_STRING_LEN];
|
||||
int is_included = !strcmp(r->protocol, "INCLUDED");
|
||||
void *sconf = r->server->module_config;
|
||||
cgi_server_conf *conf =
|
||||
(cgi_server_conf *) ap_get_module_config(sconf, &cgi_module);
|
||||
|
||||
struct cgi_child_stuff cld;
|
||||
|
||||
if (r->method_number == M_OPTIONS) {
|
||||
/* 99 out of 100 CGI scripts, this is all they support */
|
||||
r->allowed |= (1 << M_GET);
|
||||
r->allowed |= (1 << M_POST);
|
||||
return DECLINED;
|
||||
}
|
||||
|
||||
if ((argv0 = strrchr(r->filename, '/')) != NULL)
|
||||
argv0++;
|
||||
else
|
||||
argv0 = r->filename;
|
||||
|
||||
nph = !(strncmp(argv0, "nph-", 4));
|
||||
|
||||
if (!(ap_allow_options(r) & OPT_EXECCGI) && !is_scriptaliased(r))
|
||||
return log_scripterror(r, conf, FORBIDDEN, APLOG_NOERRNO,
|
||||
"Options ExecCGI is off in this directory");
|
||||
if (nph && is_included)
|
||||
return log_scripterror(r, conf, FORBIDDEN, APLOG_NOERRNO,
|
||||
"attempt to include NPH CGI script");
|
||||
|
||||
#if defined(OS2) || defined(WIN32)
|
||||
/* Allow for cgi files without the .EXE extension on them under OS/2 */
|
||||
if (r->finfo.st_mode == 0) {
|
||||
struct stat statbuf;
|
||||
char *newfile;
|
||||
|
||||
newfile = ap_pstrcat(r->pool, r->filename, ".EXE", NULL);
|
||||
|
||||
if ((stat(newfile, &statbuf) != 0) || (!S_ISREG(statbuf.st_mode))) {
|
||||
return log_scripterror(r, conf, NOT_FOUND, 0,
|
||||
"script not found or unable to stat");
|
||||
} else {
|
||||
r->filename = newfile;
|
||||
}
|
||||
}
|
||||
#else
|
||||
if (r->finfo.st_mode == 0)
|
||||
return log_scripterror(r, conf, NOT_FOUND, APLOG_NOERRNO,
|
||||
"script not found or unable to stat");
|
||||
#endif
|
||||
if (S_ISDIR(r->finfo.st_mode))
|
||||
return log_scripterror(r, conf, FORBIDDEN, APLOG_NOERRNO,
|
||||
"attempt to invoke directory as script");
|
||||
if (!ap_suexec_enabled) {
|
||||
if (!ap_can_exec(&r->finfo))
|
||||
return log_scripterror(r, conf, FORBIDDEN, APLOG_NOERRNO,
|
||||
"file permissions deny server execution");
|
||||
}
|
||||
|
||||
if ((retval = ap_setup_client_block(r, REQUEST_CHUNKED_ERROR)))
|
||||
return retval;
|
||||
|
||||
ap_add_common_vars(r);
|
||||
cld.argv0 = argv0;
|
||||
cld.r = r;
|
||||
cld.nph = nph;
|
||||
cld.debug = conf->logname ? 1 : 0;
|
||||
#ifdef TPF
|
||||
cld.t.filename = r->filename;
|
||||
cld.t.subprocess_env = r->subprocess_env;
|
||||
cld.t.prog_type = FORK_FILE;
|
||||
#endif /* TPF */
|
||||
|
||||
#ifdef CHARSET_EBCDIC
|
||||
/* XXX:@@@ Is the generated/included output ALWAYS in text/ebcdic format? */
|
||||
/* Or must we check the Content-Type first? */
|
||||
ap_bsetflag(r->connection->client, B_EBCDIC2ASCII, 1);
|
||||
#endif /*CHARSET_EBCDIC*/
|
||||
|
||||
/*
|
||||
* we spawn out of r->main if it's there so that we can avoid
|
||||
* waiting for free_proc_chain to cleanup in the middle of an
|
||||
* SSI request -djg
|
||||
*/
|
||||
if (!ap_bspawn_child(r->main ? r->main->pool : r->pool, cgi_child,
|
||||
(void *) &cld, kill_after_timeout,
|
||||
&script_out, &script_in, &script_err)) {
|
||||
ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
|
||||
"couldn't spawn child process: %s", r->filename);
|
||||
return HTTP_INTERNAL_SERVER_ERROR;
|
||||
}
|
||||
|
||||
/* Transfer any put/post args, CERN style...
|
||||
* Note that we already ignore SIGPIPE in the core server.
|
||||
*/
|
||||
|
||||
if (ap_should_client_block(r)) {
|
||||
int dbsize, len_read;
|
||||
|
||||
if (conf->logname) {
|
||||
dbuf = ap_pcalloc(r->pool, conf->bufbytes + 1);
|
||||
dbpos = 0;
|
||||
}
|
||||
|
||||
ap_hard_timeout("copy script args", r);
|
||||
|
||||
while ((len_read =
|
||||
ap_get_client_block(r, argsbuffer, HUGE_STRING_LEN)) > 0) {
|
||||
if (conf->logname) {
|
||||
if ((dbpos + len_read) > conf->bufbytes) {
|
||||
dbsize = conf->bufbytes - dbpos;
|
||||
}
|
||||
else {
|
||||
dbsize = len_read;
|
||||
}
|
||||
memcpy(dbuf + dbpos, argsbuffer, dbsize);
|
||||
dbpos += dbsize;
|
||||
}
|
||||
ap_reset_timeout(r);
|
||||
if (ap_bwrite(script_out, argsbuffer, len_read) < len_read) {
|
||||
/* silly script stopped reading, soak up remaining message */
|
||||
while (ap_get_client_block(r, argsbuffer, HUGE_STRING_LEN) > 0) {
|
||||
/* dump it */
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
ap_bflush(script_out);
|
||||
|
||||
ap_kill_timeout(r);
|
||||
}
|
||||
|
||||
ap_bclose(script_out);
|
||||
|
||||
/* Handle script return... */
|
||||
if (script_in && !nph) {
|
||||
const char *location;
|
||||
char sbuf[MAX_STRING_LEN];
|
||||
int ret;
|
||||
|
||||
if ((ret = ap_scan_script_header_err_buff(r, script_in, sbuf))) {
|
||||
return log_script(r, conf, ret, dbuf, sbuf, script_in, script_err);
|
||||
}
|
||||
|
||||
#ifdef CHARSET_EBCDIC
|
||||
/* Now check the Content-Type to decide if conversion is needed */
|
||||
ap_checkconv(r);
|
||||
#endif /*CHARSET_EBCDIC*/
|
||||
|
||||
location = ap_table_get(r->headers_out, "Location");
|
||||
|
||||
if (location && location[0] == '/' && r->status == 200) {
|
||||
|
||||
/* Soak up all the script output */
|
||||
ap_hard_timeout("read from script", r);
|
||||
while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_in) > 0) {
|
||||
continue;
|
||||
}
|
||||
while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0) {
|
||||
continue;
|
||||
}
|
||||
ap_kill_timeout(r);
|
||||
|
||||
|
||||
/* This redirect needs to be a GET no matter what the original
|
||||
* method was.
|
||||
*/
|
||||
r->method = ap_pstrdup(r->pool, "GET");
|
||||
r->method_number = M_GET;
|
||||
|
||||
/* We already read the message body (if any), so don't allow
|
||||
* the redirected request to think it has one. We can ignore
|
||||
* Transfer-Encoding, since we used REQUEST_CHUNKED_ERROR.
|
||||
*/
|
||||
ap_table_unset(r->headers_in, "Content-Length");
|
||||
|
||||
ap_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;
|
||||
}
|
||||
|
||||
ap_send_http_header(r);
|
||||
if (!r->header_only) {
|
||||
ap_send_fb(script_in, r);
|
||||
}
|
||||
ap_bclose(script_in);
|
||||
|
||||
ap_soft_timeout("soaking script stderr", r);
|
||||
while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0) {
|
||||
continue;
|
||||
}
|
||||
ap_kill_timeout(r);
|
||||
ap_bclose(script_err);
|
||||
}
|
||||
|
||||
if (script_in && nph) {
|
||||
ap_send_fb(script_in, r);
|
||||
}
|
||||
|
||||
return OK; /* NOT r->status, even if it has changed. */
|
||||
}
|
||||
|
||||
static const handler_rec cgi_handlers[] =
|
||||
{
|
||||
{CGI_MAGIC_TYPE, cgi_handler},
|
||||
{"cgi-script", cgi_handler},
|
||||
{NULL}
|
||||
};
|
||||
|
||||
module MODULE_VAR_EXPORT cgi_module =
|
||||
{
|
||||
STANDARD_MODULE_STUFF,
|
||||
NULL, /* initializer */
|
||||
NULL, /* dir config creater */
|
||||
NULL, /* dir merger --- default is to override */
|
||||
create_cgi_config, /* server config */
|
||||
merge_cgi_config, /* merge server config */
|
||||
cgi_cmds, /* 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 */
|
||||
NULL, /* header parser */
|
||||
NULL, /* child_init */
|
||||
NULL, /* child_exit */
|
||||
NULL /* post read-request */
|
||||
};
|
||||
Reference in New Issue
Block a user