| /* Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /* |
| * http_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" |
| #include "http_conf_globals.h" |
| |
| module MODULE_VAR_EXPORT cgi_module; |
| |
| /* 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. |
| */ |
| |
| static int is_scriptaliased(request_rec *r) |
| { |
| const char *t = ap_table_get(r->notes, "alias-forced-type"); |
| return t && (!strcasecmp(t, "cgi-script")); |
| } |
| |
| /* Configuration stuff */ |
| |
| #define DEFAULT_LOGBYTES 10385760 |
| #define DEFAULT_BUFBYTES 1024 |
| |
| typedef struct { |
| char *logname; |
| long logbytes; |
| int bufbytes; |
| } cgi_server_conf; |
| |
| static void *create_cgi_config(pool *p, server_rec *s) |
| { |
| cgi_server_conf *c = |
| (cgi_server_conf *) ap_pcalloc(p, sizeof(cgi_server_conf)); |
| |
| c->logname = NULL; |
| c->logbytes = DEFAULT_LOGBYTES; |
| c->bufbytes = DEFAULT_BUFBYTES; |
| |
| return c; |
| } |
| |
| static void *merge_cgi_config(pool *p, void *basev, void *overridesv) |
| { |
| cgi_server_conf *base = (cgi_server_conf *) basev, *overrides = (cgi_server_conf *) overridesv; |
| |
| return overrides->logname ? overrides : base; |
| } |
| |
| static const char *set_scriptlog(cmd_parms *cmd, void *dummy, char *arg) |
| { |
| server_rec *s = cmd->server; |
| cgi_server_conf *conf = |
| (cgi_server_conf *) ap_get_module_config(s->module_config, &cgi_module); |
| |
| conf->logname = arg; |
| return NULL; |
| } |
| |
| static const char *set_scriptlog_length(cmd_parms *cmd, void *dummy, char *arg) |
| { |
| server_rec *s = cmd->server; |
| cgi_server_conf *conf = |
| (cgi_server_conf *) ap_get_module_config(s->module_config, &cgi_module); |
| |
| conf->logbytes = atol(arg); |
| return NULL; |
| } |
| |
| static const char *set_scriptlog_buffer(cmd_parms *cmd, void *dummy, char *arg) |
| { |
| server_rec *s = cmd->server; |
| cgi_server_conf *conf = |
| (cgi_server_conf *) ap_get_module_config(s->module_config, &cgi_module); |
| |
| conf->bufbytes = atoi(arg); |
| return NULL; |
| } |
| |
| static const command_rec cgi_cmds[] = |
| { |
| {"ScriptLog", set_scriptlog, NULL, RSRC_CONF, TAKE1, |
| "the name of a log for script debugging info"}, |
| {"ScriptLogLength", set_scriptlog_length, NULL, RSRC_CONF, TAKE1, |
| "the maximum length (in bytes) of the script debug log"}, |
| {"ScriptLogBuffer", set_scriptlog_buffer, NULL, RSRC_CONF, TAKE1, |
| "the maximum size (in bytes) to record of a POST request"}, |
| {NULL} |
| }; |
| |
| static int log_scripterror(request_rec *r, cgi_server_conf * conf, int ret, |
| int show_errno, char *error) |
| { |
| FILE *f; |
| struct stat finfo; |
| |
| ap_log_rerror(APLOG_MARK, show_errno|APLOG_ERR, r, |
| "%s: %s", error, r->filename); |
| |
| if (!conf->logname || |
| ((stat(ap_server_root_relative(r->pool, conf->logname), &finfo) == 0) |
| && (finfo.st_size > conf->logbytes)) || |
| ((f = ap_pfopen(r->pool, ap_server_root_relative(r->pool, conf->logname), |
| "a")) == NULL)) { |
| return ret; |
| } |
| |
| /* "%% [Wed Jun 19 10:53:21 1996] GET /cgi-bin/printenv HTTP/1.0" */ |
| fprintf(f, "%%%% [%s] %s %s%s%s %s\n", ap_get_time(), r->method, r->uri, |
| r->args ? "?" : "", r->args ? r->args : "", r->protocol); |
| /* "%% 500 /usr/local/apache/cgi-bin */ |
| fprintf(f, "%%%% %d %s\n", ret, r->filename); |
| |
| fprintf(f, "%%error\n%s\n", error); |
| |
| ap_pfclose(r->pool, f); |
| return ret; |
| } |
| |
| static int log_script(request_rec *r, cgi_server_conf * conf, int ret, |
| char *dbuf, const char *sbuf, BUFF *script_in, BUFF *script_err) |
| { |
| array_header *hdrs_arr = ap_table_elts(r->headers_in); |
| table_entry *hdrs = (table_entry *) hdrs_arr->elts; |
| char argsbuffer[HUGE_STRING_LEN]; |
| FILE *f; |
| int i; |
| struct stat finfo; |
| |
| if (!conf->logname || |
| ((stat(ap_server_root_relative(r->pool, conf->logname), &finfo) == 0) |
| && (finfo.st_size > conf->logbytes)) || |
| ((f = ap_pfopen(r->pool, ap_server_root_relative(r->pool, conf->logname), |
| "a")) == NULL)) { |
| /* Soak up script output */ |
| while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_in) > 0) |
| continue; |
| #if defined(WIN32) || defined(NETWARE) |
| /* Soak up stderr and redirect it to the error log. |
| * Script output to stderr is already directed to the error log |
| * on Unix, thanks to the magic of fork(). |
| */ |
| while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR | APLOG_NOERRNO, r, |
| "%s", argsbuffer); |
| } |
| #else |
| while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0) |
| continue; |
| #endif |
| return ret; |
| } |
| |
| /* "%% [Wed Jun 19 10:53:21 1996] GET /cgi-bin/printenv HTTP/1.0" */ |
| fprintf(f, "%%%% [%s] %s %s%s%s %s\n", ap_get_time(), r->method, r->uri, |
| r->args ? "?" : "", r->args ? r->args : "", r->protocol); |
| /* "%% 500 /usr/local/apache/cgi-bin" */ |
| fprintf(f, "%%%% %d %s\n", ret, r->filename); |
| |
| fputs("%request\n", f); |
| for (i = 0; i < hdrs_arr->nelts; ++i) { |
| if (!hdrs[i].key) |
| continue; |
| fprintf(f, "%s: %s\n", hdrs[i].key, hdrs[i].val); |
| } |
| if ((r->method_number == M_POST || r->method_number == M_PUT) |
| && dbuf && *dbuf) { |
| fprintf(f, "\n%s\n", dbuf); |
| } |
| |
| fputs("%response\n", f); |
| hdrs_arr = ap_table_elts(r->err_headers_out); |
| hdrs = (table_entry *) hdrs_arr->elts; |
| |
| for (i = 0; i < hdrs_arr->nelts; ++i) { |
| if (!hdrs[i].key) |
| continue; |
| fprintf(f, "%s: %s\n", hdrs[i].key, hdrs[i].val); |
| } |
| |
| if (sbuf && *sbuf) |
| fprintf(f, "%s\n", sbuf); |
| |
| if (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_in) > 0) { |
| fputs("%stdout\n", f); |
| fputs(argsbuffer, f); |
| while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_in) > 0) |
| fputs(argsbuffer, f); |
| fputs("\n", f); |
| } |
| |
| if (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0) { |
| fputs("%stderr\n", f); |
| fputs(argsbuffer, f); |
| while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0) |
| fputs(argsbuffer, f); |
| fputs("\n", f); |
| } |
| |
| ap_bclose(script_in); |
| ap_bclose(script_err); |
| |
| ap_pfclose(r->pool, f); |
| return ret; |
| } |
| |
| /**************************************************************** |
| * |
| * Actual CGI handling... |
| */ |
| |
| |
| struct cgi_child_stuff { |
| #ifdef TPF |
| TPF_FORK_CHILD t; |
| #endif |
| request_rec *r; |
| int nph; |
| int debug; |
| char *argv0; |
| }; |
| |
| static int cgi_child(void *child_stuff, child_info *pinfo) |
| { |
| struct cgi_child_stuff *cld = (struct cgi_child_stuff *) child_stuff; |
| request_rec *r = cld->r; |
| char *argv0 = cld->argv0; |
| int child_pid; |
| |
| #ifdef DEBUG_CGI |
| #ifdef OS2 |
| /* 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; |
| |
| RAISE_SIGSTOP(CGI_CHILD); |
| #ifdef DEBUG_CGI |
| fprintf(dbg, "Attempting to exec %s as %sCGI child (argv0 = %s)\n", |
| r->filename, cld->nph ? "NPH " : "", argv0); |
| #endif |
| |
| ap_add_cgi_vars(r); |
| env = ap_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 |
| |
| #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 ((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 |
| /* The included MIME headers must ALWAYS be in text/ebcdic format. |
| * Only after reading the MIME headers, we check the Content-Type |
| * and switch to the necessary conversion mode. |
| * Until then (and in case an nph- script was called), use the |
| * configured default conversion: |
| */ |
| ap_bsetflag(r->connection->client, B_EBCDIC2ASCII, r->ebcdic.conv_out); |
| #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); |
| } |
| |
| 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; |
| } |
| #if defined(WIN32) || defined(NETWARE) |
| /* Soak up stderr and redirect it to the error log. |
| * Script output to stderr is already directed to the error log |
| * on Unix, thanks to the magic of fork(). |
| */ |
| while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR | APLOG_NOERRNO, r, |
| "%s", argsbuffer); |
| } |
| #else |
| while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0) { |
| continue; |
| } |
| #endif |
| 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); |
| #if defined(WIN32) || defined(NETWARE) |
| /* Script output to stderr is already directed to the error log |
| * on Unix, thanks to the magic of fork(). |
| */ |
| while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR | APLOG_NOERRNO, r, |
| "%s", argsbuffer); |
| } |
| #else |
| while (ap_bgets(argsbuffer, HUGE_STRING_LEN, script_err) > 0) { |
| continue; |
| } |
| #endif |
| 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 */ |
| }; |