/* Copyright 1999-2004 The Apache Software Foundation * * Licensed 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. */ #ifndef APACHE_HTTP_REQUEST_H #define APACHE_HTTP_REQUEST_H #include "apr_hooks.h" #include "util_filter.h" #ifdef __cplusplus extern "C" { #endif #define AP_SUBREQ_NO_ARGS 0 #define AP_SUBREQ_MERGE_ARGS 1 /** * @file http_request.h * @brief Apache Request library */ /* http_request.c is the code which handles the main line of request * processing, once a request has been read in (finding the right per- * directory configuration, building it if necessary, and calling all * the module dispatch functions in the right order). * * The pieces here which are public to the modules, allow them to learn * how the server would handle some other file or URI, or perhaps even * direct the server to serve that other file instead of the one the * client requested directly. * * There are two ways to do that. The first is the sub_request mechanism, * which handles looking up files and URIs as adjuncts to some other * request (e.g., directory entries for multiviews and directory listings); * the lookup functions stop short of actually running the request, but * (e.g., for includes), a module may call for the request to be run * by calling run_sub_req. The space allocated to create sub_reqs can be * reclaimed by calling destroy_sub_req --- be sure to copy anything you care * about which was allocated in its apr_pool_t elsewhere before doing this. */ /** * An internal handler used by the ap_process_request, all sub request mechanisms * and the redirect mechanism. * @param r The request, subrequest or internal redirect to pre-process * @return The return code for the request */ AP_DECLARE(int) ap_process_request_internal(request_rec *r); /** * Create a sub request from the given URI. This sub request can be * inspected to find information about the requested URI * @param new_uri The URI to lookup * @param r The current request * @param next_filter The first filter the sub_request should use. If this is * NULL, it defaults to the first filter for the main request * @return The new request record * @deffunc request_rec * ap_sub_req_lookup_uri(const char *new_uri, const request_rec *r) */ AP_DECLARE(request_rec *) ap_sub_req_lookup_uri(const char *new_uri, const request_rec *r, ap_filter_t *next_filter); /** * Create a sub request for the given file. This sub request can be * inspected to find information about the requested file * @param new_file The file to lookup * @param r The current request * @param next_filter The first filter the sub_request should use. If this is * NULL, it defaults to the first filter for the main request * @return The new request record * @deffunc request_rec * ap_sub_req_lookup_file(const char *new_file, const request_rec *r) */ AP_DECLARE(request_rec *) ap_sub_req_lookup_file(const char *new_file, const request_rec *r, ap_filter_t *next_filter); /** * Create a sub request for the given apr_dir_read result. This sub request * can be inspected to find information about the requested file * @param finfo The apr_dir_read result to lookup * @param r The current request * @param subtype What type of subrequest to perform, one of; *
* AP_SUBREQ_NO_ARGS ignore r->args and r->path_info * AP_SUBREQ_MERGE_ARGS merge r->args and r->path_info ** @param next_filter The first filter the sub_request should use. If this is * NULL, it defaults to the first filter for the main request * @return The new request record * @deffunc request_rec * ap_sub_req_lookup_dirent(apr_finfo_t *finfo, int subtype, const request_rec *r) * @tip The apr_dir_read flags value APR_FINFO_MIN|APR_FINFO_NAME flag is the * minimum recommended query if the results will be passed to apr_dir_read. * The file info passed must include the name, and must have the same relative * directory as the current request. */ AP_DECLARE(request_rec *) ap_sub_req_lookup_dirent(const apr_finfo_t *finfo, const request_rec *r, int subtype, ap_filter_t *next_filter); /** * Create a sub request for the given URI using a specific method. This * sub request can be inspected to find information about the requested URI * @param method The method to use in the new sub request * @param new_uri The URI to lookup * @param r The current request * @param next_filter The first filter the sub_request should use. If this is * NULL, it defaults to the first filter for the main request * @return The new request record * @deffunc request_rec * ap_sub_req_method_uri(const char *method, const char *new_uri, const request_rec *r) */ AP_DECLARE(request_rec *) ap_sub_req_method_uri(const char *method, const char *new_uri, const request_rec *r, ap_filter_t *next_filter); /** * An output filter to strip EOS buckets from sub-requests. This always * has to be inserted at the end of a sub-requests filter stack. * @param f The current filter * @param bb The brigade to filter * @deffunc apr_status_t ap_sub_req_output_filter(ap_filter_t *f, apr_bucket_brigade *bb) */ AP_CORE_DECLARE_NONSTD(apr_status_t) ap_sub_req_output_filter(ap_filter_t *f, apr_bucket_brigade *bb); /** * Run the handler for the sub request * @param r The sub request to run * @return The return code for the sub request * @deffunc int ap_run_sub_req(request_rec *r) */ AP_DECLARE(int) ap_run_sub_req(request_rec *r); /** * Free the memory associated with a sub request * @param r The sub request to finish * @deffunc void ap_destroy_sub_req(request_rec *r) */ AP_DECLARE(void) ap_destroy_sub_req(request_rec *r); /* * Then there's the case that you want some other request to be served * as the top-level request INSTEAD of what the client requested directly. * If so, call this from a handler, and then immediately return OK. */ /** * Redirect the current request to some other uri * @param new_uri The URI to replace the current request with * @param r The current request * @deffunc void ap_internal_redirect(const char *new_uri, request_rec *r) */ AP_DECLARE(void) ap_internal_redirect(const char *new_uri, request_rec *r); /** * This function is designed for things like actions or CGI scripts, when * using AddHandler, and you want to preserve the content type across * an internal redirect. * @param new_uri The URI to replace the current request with. * @param r The current request * @deffunc void ap_internal_redirect_handler(const char *new_uri, request_rec *r) */ AP_DECLARE(void) ap_internal_redirect_handler(const char *new_uri, request_rec *r); /** * Redirect the current request to a sub_req, merging the pools * @param sub_req A subrequest created from this request * @param r The current request * @deffunc void ap_internal_fast_redirect(request_rec *sub_req, request_rec *r) * @tip the sub_req's pool will be merged into r's pool, be very careful * not to destroy this subrequest, it will be destroyed with the main request! */ AP_DECLARE(void) ap_internal_fast_redirect(request_rec *sub_req, request_rec *r); /** * Can be used within any handler to determine if any authentication * is required for the current request * @param r The current request * @return 1 if authentication is required, 0 otherwise * @deffunc int ap_some_auth_required(request_rec *r) */ AP_DECLARE(int) ap_some_auth_required(request_rec *r); /** * Determine if the current request is the main request or a sub requests * @param r The current request * @retrn 1 if this is a main request, 0 otherwise * @deffunc int ap_is_initial_req(request_rec *r) */ AP_DECLARE(int) ap_is_initial_req(request_rec *r); /** * Function to set the r->mtime field to the specified value if it's later * than what's already there. * @param r The current request * @param dependency_time Time to set the mtime to * @deffunc void ap_update_mtime(request_rec *r, apr_time_t dependency_mtime) */ AP_DECLARE(void) ap_update_mtime(request_rec *r, apr_time_t dependency_mtime); /** * Add one or more methods to the list permitted to access the resource. * Usually executed by the content handler before the response header is * sent, but sometimes invoked at an earlier phase if a module knows it * can set the list authoritatively. Note that the methods are ADDED * to any already permitted unless the reset flag is non-zero. The * list is used to generate the Allow response header field when it * is needed. * @param r The pointer to the request identifying the resource. * @param reset Boolean flag indicating whether this list should * completely replace any current settings. * @param ... A NULL-terminated list of strings, each identifying a * method name to add. * @return None. * @deffunc void ap_allow_methods(request_rec *r, int reset, ...) */ AP_DECLARE(void) ap_allow_methods(request_rec *r, int reset, ...); /** * Add one or more methods to the list permitted to access the resource. * Usually executed by the content handler before the response header is * sent, but sometimes invoked at an earlier phase if a module knows it * can set the list authoritatively. Note that the methods are ADDED * to any already permitted unless the reset flag is non-zero. The * list is used to generate the Allow response header field when it * is needed. * @param r The pointer to the request identifying the resource. * @param reset Boolean flag indicating whether this list should * completely replace any current settings. * @param ... A list of method identifiers, from the "M_" series * defined in httpd.h, terminated with a value of -1 * (e.g., "M_GET, M_POST, M_OPTIONS, -1") * @return None. * @deffunc void ap_allow_standard_methods(request_rec *r, int reset, ...) */ AP_DECLARE(void) ap_allow_standard_methods(request_rec *r, int reset, ...); #define MERGE_ALLOW 0 #define REPLACE_ALLOW 1 #ifdef CORE_PRIVATE /* Function called by main.c to handle first-level request */ void ap_process_request(request_rec *); /** * Kill the current request * @param type Why the request is dieing * @param r The current request * @deffunc void ap_die(int type, request_rec *r) */ AP_DECLARE(void) ap_die(int type, request_rec *r); #endif /* Hooks */ /** * Gives modules a chance to create their request_config entry when the * request is created. * @param r The current request * @ingroup hooks */ AP_DECLARE_HOOK(int,create_request,(request_rec *r)) /** * This hook allow modules an opportunity to translate the URI into an * actual filename. If no modules do anything special, the server's default * rules will be followed. * @param r The current request * @return OK, DECLINED, or HTTP_... * @ingroup hooks */ AP_DECLARE_HOOK(int,translate_name,(request_rec *r)) /** * This hook allow modules to set the per_dir_config based on their own * context (such as