diff options
Diffstat (limited to 'modules/mappers/mod_actions.c')
| -rw-r--r-- | modules/mappers/mod_actions.c | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/modules/mappers/mod_actions.c b/modules/mappers/mod_actions.c new file mode 100644 index 0000000..ac9c3b7 --- /dev/null +++ b/modules/mappers/mod_actions.c @@ -0,0 +1,230 @@ +/* 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. + */ + +/* + * mod_actions.c: executes scripts based on MIME type or HTTP method + * + * by Alexei Kosut; based on mod_cgi.c, mod_mime.c and mod_includes.c, + * adapted by rst from original NCSA code by Rob McCool + * + * Usage instructions: + * + * Action mime/type /cgi-bin/script + * + * will activate /cgi-bin/script when a file of content type mime/type is + * requested. It sends the URL and file path of the requested document using + * the standard CGI PATH_INFO and PATH_TRANSLATED environment variables. + * + * Script PUT /cgi-bin/script + * + * will activate /cgi-bin/script when a request is received with the + * HTTP method "PUT". The available method names are defined in httpd.h. + * If the method is GET, the script will only be activated if the requested + * URI includes query information (stuff after a ?-mark). + */ + +#include "apr_strings.h" +#define APR_WANT_STRFUNC +#include "apr_want.h" +#include "ap_config.h" +#include "httpd.h" +#include "http_config.h" +#include "http_request.h" +#include "http_core.h" +#include "http_protocol.h" +#include "http_main.h" +#include "http_log.h" +#include "util_script.h" + +typedef struct { + apr_table_t *action_types; /* Added with Action... */ + const char *scripted[METHODS]; /* Added with Script... */ + int configured; /* True if Action or Script has been + * called at least once + */ +} action_dir_config; + +module AP_MODULE_DECLARE_DATA actions_module; + +static void *create_action_dir_config(apr_pool_t *p, char *dummy) +{ + action_dir_config *new = + (action_dir_config *) apr_pcalloc(p, sizeof(action_dir_config)); + + new->action_types = apr_table_make(p, 4); + + return new; +} + +static void *merge_action_dir_configs(apr_pool_t *p, void *basev, void *addv) +{ + action_dir_config *base = (action_dir_config *) basev; + action_dir_config *add = (action_dir_config *) addv; + action_dir_config *new = (action_dir_config *) apr_palloc(p, + sizeof(action_dir_config)); + int i; + + new->action_types = apr_table_overlay(p, add->action_types, + base->action_types); + + for (i = 0; i < METHODS; ++i) { + new->scripted[i] = add->scripted[i] ? add->scripted[i] + : base->scripted[i]; + } + + new->configured = (base->configured || add->configured); + return new; +} + +static const char *add_action(cmd_parms *cmd, void *m_v, + const char *type, const char *script, + const char *option) +{ + action_dir_config *m = (action_dir_config *)m_v; + + if (option && strcasecmp(option, "virtual")) { + return apr_pstrcat(cmd->pool, + "unrecognized option '", option, "'", NULL); + } + + apr_table_setn(m->action_types, type, + apr_pstrcat(cmd->pool, option ? "1" : "0", script, NULL)); + m->configured = 1; + + return NULL; +} + +static const char *set_script(cmd_parms *cmd, void *m_v, + const char *method, const char *script) +{ + action_dir_config *m = (action_dir_config *)m_v; + int methnum; + if (cmd->pool == cmd->temp_pool) { + /* In .htaccess, we can't globally register new methods. */ + methnum = ap_method_number_of(method); + } + else { + /* ap_method_register recognizes already registered methods, + * so don't bother to check its previous existence explicitly. + */ + methnum = ap_method_register(cmd->pool, method); + } + + if (methnum == M_TRACE) { + return "TRACE not allowed for Script"; + } + else if (methnum == M_INVALID) { + return apr_pstrcat(cmd->pool, "Could not register method '", method, + "' for Script", NULL); + } + + m->scripted[methnum] = script; + m->configured = 1; + + return NULL; +} + +static const command_rec action_cmds[] = +{ + AP_INIT_TAKE23("Action", add_action, NULL, OR_FILEINFO, + "a media type followed by a script name"), + AP_INIT_TAKE2("Script", set_script, NULL, ACCESS_CONF | RSRC_CONF, + "a method followed by a script name"), + {NULL} +}; + +static int action_handler(request_rec *r) +{ + action_dir_config *conf = (action_dir_config *) + ap_get_module_config(r->per_dir_config, &actions_module); + const char *t, *action; + const char *script; + int i; + + if (!conf->configured) { + return DECLINED; + } + + /* Note that this handler handles _all_ types, so handler is unchecked */ + + /* Set allowed stuff */ + for (i = 0; i < METHODS; ++i) { + if (conf->scripted[i]) + r->allowed |= (AP_METHOD_BIT << i); + } + + /* First, check for the method-handling scripts */ + if (r->method_number == M_GET) { + if (r->args) + script = conf->scripted[M_GET]; + else + script = NULL; + } + else { + script = conf->scripted[r->method_number]; + } + + /* Check for looping, which can happen if the CGI script isn't */ + if (script && r->prev && r->prev->prev) + return DECLINED; + + /* Second, check for actions (which override the method scripts) */ + action = r->handler ? r->handler : + ap_field_noparam(r->pool, r->content_type); + + if (action && (t = apr_table_get(conf->action_types, action))) { + int virtual = (*t++ == '0' ? 0 : 1); + if (!virtual && r->finfo.filetype == APR_NOFILE) { + ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00652) + "File does not exist: %s", r->filename); + return HTTP_NOT_FOUND; + } + + script = t; + /* propagate the handler name to the script + * (will be REDIRECT_HANDLER there) + */ + apr_table_setn(r->subprocess_env, "HANDLER", action); + if (virtual) { + apr_table_setn(r->notes, "virtual_script", "1"); + } + } + + if (script == NULL) + return DECLINED; + + ap_internal_redirect_handler(apr_pstrcat(r->pool, script, + ap_escape_uri(r->pool, r->uri), + r->args ? "?" : NULL, + r->args, NULL), r); + return OK; +} + +static void register_hooks(apr_pool_t *p) +{ + ap_hook_handler(action_handler,NULL,NULL,APR_HOOK_LAST); +} + +AP_DECLARE_MODULE(actions) = +{ + STANDARD20_MODULE_STUFF, + create_action_dir_config, /* dir config creater */ + merge_action_dir_configs, /* dir merger --- default is to override */ + NULL, /* server config */ + NULL, /* merge server config */ + action_cmds, /* command apr_table_t */ + register_hooks /* register hooks */ +}; |