| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2000-2001 The Apache Software Foundation. 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. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Apache" and "Apache Software Foundation" 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. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``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 SOFTWARE FOUNDATION 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 Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| * Portions of this software are based upon public domain software |
| * originally written at the National Center for Supercomputing Applications, |
| * University of Illinois, Urbana-Champaign. |
| */ |
| |
| /* |
| * http_request.c: functions to get and process requests |
| * |
| * Rob McCool 3/21/93 |
| * |
| * Thoroughly revamped by rst for Apache. NB this file reads |
| * best from the bottom up. |
| * |
| */ |
| |
| #include "apr_strings.h" |
| #include "apr_file_io.h" |
| #include "apr_fnmatch.h" |
| |
| #define APR_WANT_STRFUNC |
| #include "apr_want.h" |
| |
| #define CORE_PRIVATE |
| #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_log.h" |
| #include "http_main.h" |
| #include "util_filter.h" |
| #include "util_charset.h" |
| |
| #include "mod_core.h" |
| |
| #if APR_HAVE_STDARG_H |
| #include <stdarg.h> |
| #endif |
| |
| /***************************************************************** |
| * |
| * Mainline request processing... |
| */ |
| |
| AP_DECLARE(void) ap_die(int type, request_rec *r) |
| { |
| int error_index = ap_index_of_response(type); |
| char *custom_response = ap_response_code_string(r, error_index); |
| int recursive_error = 0; |
| |
| if (type == AP_FILTER_ERROR) { |
| return; |
| } |
| |
| if (type == DONE) { |
| ap_finalize_request_protocol(r); |
| return; |
| } |
| |
| /* |
| * The following takes care of Apache redirects to custom response URLs |
| * Note that if we are already dealing with the response to some other |
| * error condition, we just report on the original error, and give up on |
| * any attempt to handle the other thing "intelligently"... |
| */ |
| |
| if (r->status != HTTP_OK) { |
| recursive_error = type; |
| |
| while (r->prev && (r->prev->status != HTTP_OK)) |
| r = r->prev; /* Get back to original error */ |
| |
| type = r->status; |
| custom_response = NULL; /* Do NOT retry the custom thing! */ |
| } |
| |
| r->status = type; |
| |
| /* |
| * This test is done here so that none of the auth modules needs to know |
| * about proxy authentication. They treat it like normal auth, and then |
| * we tweak the status. |
| */ |
| if (HTTP_UNAUTHORIZED == r->status && PROXYREQ_PROXY == r->proxyreq) { |
| r->status = HTTP_PROXY_AUTHENTICATION_REQUIRED; |
| } |
| |
| /* |
| * If we want to keep the connection, be sure that the request body |
| * (if any) has been read. |
| */ |
| if ((r->status != HTTP_NOT_MODIFIED) && (r->status != HTTP_NO_CONTENT) |
| && !ap_status_drops_connection(r->status) |
| && r->connection && (r->connection->keepalive != -1)) { |
| |
| (void) ap_discard_request_body(r); |
| } |
| |
| /* |
| * Two types of custom redirects --- plain text, and URLs. Plain text has |
| * a leading '"', so the URL code, here, is triggered on its absence |
| */ |
| |
| if (custom_response && custom_response[0] != '"') { |
| |
| if (ap_is_url(custom_response)) { |
| /* |
| * The URL isn't local, so lets drop through the rest of this |
| * apache code, and continue with the usual REDIRECT handler. |
| * But note that the client will ultimately see the wrong |
| * status... |
| */ |
| r->status = HTTP_MOVED_TEMPORARILY; |
| apr_table_setn(r->headers_out, "Location", custom_response); |
| } |
| else if (custom_response[0] == '/') { |
| const char *error_notes; |
| r->no_local_copy = 1; /* Do NOT send HTTP_NOT_MODIFIED for |
| * error documents! */ |
| /* |
| * This redirect needs to be a GET no matter what the original |
| * method was. |
| */ |
| apr_table_setn(r->subprocess_env, "REQUEST_METHOD", r->method); |
| |
| /* |
| * Provide a special method for modules to communicate |
| * more informative (than the plain canned) messages to us. |
| * Propagate them to ErrorDocuments via the ERROR_NOTES variable: |
| */ |
| if ((error_notes = apr_table_get(r->notes, "error-notes")) != NULL) { |
| apr_table_setn(r->subprocess_env, "ERROR_NOTES", error_notes); |
| } |
| r->method = apr_pstrdup(r->pool, "GET"); |
| r->method_number = M_GET; |
| ap_internal_redirect(custom_response, r); |
| return; |
| } |
| else { |
| /* |
| * Dumb user has given us a bad url to redirect to --- fake up |
| * dying with a recursive server error... |
| */ |
| recursive_error = HTTP_INTERNAL_SERVER_ERROR; |
| ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, r, |
| "Invalid error redirection directive: %s", |
| custom_response); |
| } |
| } |
| ap_send_error_response(r, recursive_error); |
| } |
| |
| static void decl_die(int status, char *phase, request_rec *r) |
| { |
| if (status == DECLINED) { |
| ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_CRIT, 0, r, |
| "configuration error: couldn't %s: %s", phase, r->uri); |
| ap_die(HTTP_INTERNAL_SERVER_ERROR, r); |
| } |
| else |
| ap_die(status, r); |
| } |
| |
| static void process_request_internal(request_rec *r) |
| { |
| int access_status; |
| |
| /* Ignore embedded %2F's in path for proxy requests */ |
| if (!r->proxyreq && r->parsed_uri.path) { |
| access_status = ap_unescape_url(r->parsed_uri.path); |
| if (access_status) { |
| ap_die(access_status, r); |
| return; |
| } |
| } |
| |
| ap_getparents(r->uri); /* OK --- shrinking transformations... */ |
| |
| if ((access_status = location_walk(r))) { |
| ap_die(access_status, r); |
| return; |
| } |
| |
| if ((access_status = ap_run_translate_name(r))) { |
| decl_die(access_status, "translate", r); |
| return; |
| } |
| |
| if (!r->proxyreq) { |
| /* |
| * We don't want TRACE to run through the normal handler set, we |
| * handle it specially. |
| */ |
| if (r->method_number == M_TRACE) { |
| if ((access_status = ap_send_http_trace(r))) |
| ap_die(access_status, r); |
| else |
| ap_finalize_request_protocol(r); |
| return; |
| } |
| } |
| |
| if (r->proto_num > HTTP_VERSION(1,0) && apr_table_get(r->subprocess_env, "downgrade-1.0")) { |
| r->proto_num = HTTP_VERSION(1,0); |
| } |
| |
| /* |
| * NB: directory_walk() clears the per_dir_config, so we don't inherit |
| * from location_walk() above |
| */ |
| |
| if ((access_status = directory_walk(r))) { |
| ap_die(access_status, r); |
| return; |
| } |
| |
| if ((access_status = file_walk(r))) { |
| ap_die(access_status, r); |
| return; |
| } |
| |
| if ((access_status = location_walk(r))) { |
| ap_die(access_status, r); |
| return; |
| } |
| |
| if ((access_status = ap_run_header_parser(r))) { |
| ap_die(access_status, r); |
| return; |
| } |
| |
| switch (ap_satisfies(r)) { |
| case SATISFY_ALL: |
| case SATISFY_NOSPEC: |
| if ((access_status = ap_run_access_checker(r)) != 0) { |
| decl_die(access_status, "check access", r); |
| return; |
| } |
| if (ap_some_auth_required(r)) { |
| if (((access_status = ap_run_check_user_id(r)) != 0) || !ap_auth_type(r)) { |
| decl_die(access_status, ap_auth_type(r) |
| ? "check user. No user file?" |
| : "perform authentication. AuthType not set!", r); |
| return; |
| } |
| if (((access_status = ap_run_auth_checker(r)) != 0) || !ap_auth_type(r)) { |
| decl_die(access_status, ap_auth_type(r) |
| ? "check access. No groups file?" |
| : "perform authentication. AuthType not set!", r); |
| return; |
| } |
| } |
| break; |
| case SATISFY_ANY: |
| if (((access_status = ap_run_access_checker(r)) != 0) || !ap_auth_type(r)) { |
| if (!ap_some_auth_required(r)) { |
| decl_die(access_status, ap_auth_type(r) |
| ? "check access" |
| : "perform authentication. AuthType not set!", r); |
| return; |
| } |
| if (((access_status = ap_run_check_user_id(r)) != 0) || !ap_auth_type(r)) { |
| decl_die(access_status, ap_auth_type(r) |
| ? "check user. No user file?" |
| : "perform authentication. AuthType not set!", r); |
| return; |
| } |
| if (((access_status = ap_run_auth_checker(r)) != 0) || !ap_auth_type(r)) { |
| decl_die(access_status, ap_auth_type(r) |
| ? "check access. No groups file?" |
| : "perform authentication. AuthType not set!", r); |
| return; |
| } |
| } |
| break; |
| } |
| |
| if (! (r->proxyreq |
| && r->parsed_uri.scheme != NULL |
| && strcmp(r->parsed_uri.scheme, "http") == 0) ) { |
| if ((access_status = ap_run_type_checker(r)) != 0) { |
| decl_die(access_status, "find types", r); |
| return; |
| } |
| } |
| |
| if ((access_status = ap_run_fixups(r)) != 0) { |
| ap_die(access_status, r); |
| return; |
| } |
| |
| /* The new insert_filter stage makes sense here IMHO. We are sure that |
| * we are going to run the request now, so we may as well insert filters |
| * if any are available. Since the goal of this phase is to allow all |
| * modules to insert a filter if they want to, this filter returns |
| * void. I just can't see any way that this filter can reasonably |
| * fail, either your modules inserts something or it doesn't. rbb |
| */ |
| ap_run_insert_filter(r); |
| |
| if ((access_status = ap_invoke_handler(r)) != 0) { |
| ap_die(access_status, r); |
| return; |
| } |
| |
| /* Take care of little things that need to happen when we're done */ |
| ap_finalize_request_protocol(r); |
| } |
| |
| static void check_pipeline_flush(request_rec *r) |
| { |
| /* ### if would be nice if we could PEEK without a brigade. that would |
| ### allow us to defer creation of the brigade to when we actually |
| ### need to send a FLUSH. */ |
| apr_bucket_brigade *bb = apr_brigade_create(r->pool); |
| apr_size_t zero = 0; |
| |
| /* Flush the filter contents if: |
| * |
| * 1) the connection will be closed |
| * 2) there isn't a request ready to be read |
| */ |
| /* ### shouldn't this read from the connection input filters? */ |
| if (!r->connection->keepalive || |
| ap_get_brigade(r->input_filters, bb, AP_MODE_PEEK, &zero) != APR_SUCCESS) { |
| apr_bucket *e = apr_bucket_flush_create(); |
| |
| /* We just send directly to the connection based filters. At |
| * this point, we know that we have seen all of the data |
| * (request finalization sent an EOS bucket, which empties all |
| * of the request filters). We just want to flush the buckets |
| * if something hasn't been sent to the network yet. |
| */ |
| APR_BRIGADE_INSERT_HEAD(bb, e); |
| ap_pass_brigade(r->connection->output_filters, bb); |
| } |
| } |
| |
| void ap_process_request(request_rec *r) |
| { |
| int access_status; |
| |
| /* Give quick handlers a shot at serving the request on the fast |
| * path, bypassing all of the other Apache hooks. |
| * |
| * This hook was added to enable serving files out of a URI keyed |
| * content cache ( e.g., Mike Abbott's Quick Shortcut Cache, |
| * described here: http://oss.sgi.com/projects/apache/mod_qsc.html ) |
| * |
| * It may have other uses as well, such as routing requests directly to |
| * content handlers that have the ability to grok HTTP and do their |
| * own access checking, etc (e.g. servlet engines). |
| * |
| * Use this hook with extreme care and only if you know what you are |
| * doing. |
| * |
| * Consider moving this hook to after the first location_walk in order |
| * to enable the quick handler to make decisions based on config |
| * directives in Location blocks. |
| */ |
| access_status = ap_run_quick_handler(r); |
| if (access_status == OK) { |
| ap_finalize_request_protocol(r); |
| } |
| else if (access_status == DECLINED) { |
| process_request_internal(r); |
| } |
| else { |
| ap_die(access_status, r); |
| } |
| |
| /* |
| * We want to flush the last packet if this isn't a pipelining connection |
| * *before* we start into logging. Suppose that the logging causes a DNS |
| * lookup to occur, which may have a high latency. If we hold off on |
| * this packet, then it'll appear like the link is stalled when really |
| * it's the application that's stalled. |
| */ |
| check_pipeline_flush(r); |
| ap_run_log_transaction(r); |
| } |
| |
| static apr_table_t *rename_original_env(apr_pool_t *p, apr_table_t *t) |
| { |
| apr_array_header_t *env_arr = apr_table_elts(t); |
| apr_table_entry_t *elts = (apr_table_entry_t *) env_arr->elts; |
| apr_table_t *new = apr_table_make(p, env_arr->nalloc); |
| int i; |
| |
| for (i = 0; i < env_arr->nelts; ++i) { |
| if (!elts[i].key) |
| continue; |
| apr_table_setn(new, apr_pstrcat(p, "REDIRECT_", elts[i].key, NULL), |
| elts[i].val); |
| } |
| |
| return new; |
| } |
| |
| static request_rec *internal_internal_redirect(const char *new_uri, |
| request_rec *r) { |
| int access_status; |
| request_rec *new = (request_rec *) apr_pcalloc(r->pool, |
| sizeof(request_rec)); |
| |
| new->connection = r->connection; |
| new->server = r->server; |
| new->pool = r->pool; |
| |
| /* |
| * A whole lot of this really ought to be shared with http_protocol.c... |
| * another missing cleanup. It's particularly inappropriate to be |
| * setting header_only, etc., here. |
| */ |
| |
| new->method = r->method; |
| new->method_number = r->method_number; |
| new->allowed_methods = ap_make_method_list(new->pool, 2); |
| ap_parse_uri(new, new_uri); |
| |
| new->request_config = ap_create_request_config(r->pool); |
| |
| new->per_dir_config = r->server->lookup_defaults; |
| |
| new->prev = r; |
| r->next = new; |
| |
| /* Must have prev and next pointers set before calling create_request |
| * hook. |
| */ |
| ap_run_create_request(new); |
| |
| /* Inherit the rest of the protocol info... */ |
| |
| new->the_request = r->the_request; |
| |
| new->allowed = r->allowed; |
| |
| new->status = r->status; |
| new->assbackwards = r->assbackwards; |
| new->header_only = r->header_only; |
| new->protocol = r->protocol; |
| new->proto_num = r->proto_num; |
| new->hostname = r->hostname; |
| new->request_time = r->request_time; |
| new->main = r->main; |
| |
| new->headers_in = r->headers_in; |
| new->headers_out = apr_table_make(r->pool, 12); |
| new->err_headers_out = r->err_headers_out; |
| new->subprocess_env = rename_original_env(r->pool, r->subprocess_env); |
| new->notes = apr_table_make(r->pool, 5); |
| new->allowed_methods = ap_make_method_list(new->pool, 2); |
| |
| new->htaccess = r->htaccess; |
| new->no_cache = r->no_cache; |
| new->expecting_100 = r->expecting_100; |
| new->no_local_copy = r->no_local_copy; |
| new->read_length = r->read_length; /* We can only read it once */ |
| new->vlist_validator = r->vlist_validator; |
| |
| new->output_filters = r->connection->output_filters; |
| new->input_filters = r->connection->input_filters; |
| |
| ap_add_output_filter("BYTERANGE", NULL, new, new->connection); |
| ap_add_output_filter("CONTENT_LENGTH", NULL, new, new->connection); |
| ap_add_output_filter("HTTP_HEADER", NULL, new, new->connection); |
| |
| apr_table_setn(new->subprocess_env, "REDIRECT_STATUS", |
| apr_psprintf(r->pool, "%d", r->status)); |
| |
| /* |
| * XXX: hmm. This is because mod_setenvif and mod_unique_id really need |
| * to do their thing on internal redirects as well. Perhaps this is a |
| * misnamed function. |
| */ |
| if ((access_status = ap_run_post_read_request(new))) { |
| ap_die(access_status, new); |
| return NULL; |
| } |
| |
| return new; |
| } |
| |
| AP_DECLARE(void) ap_internal_redirect(const char *new_uri, request_rec *r) |
| { |
| request_rec *new = internal_internal_redirect(new_uri, r); |
| process_request_internal(new); |
| } |
| |
| /* 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. |
| */ |
| AP_DECLARE(void) ap_internal_redirect_handler(const char *new_uri, request_rec *r) |
| { |
| request_rec *new = internal_internal_redirect(new_uri, r); |
| if (r->handler) |
| new->content_type = r->content_type; |
| process_request_internal(new); |
| } |
| |
| AP_DECLARE(void) ap_allow_methods(request_rec *r, int reset, ...) |
| { |
| const char *method; |
| va_list methods; |
| |
| /* |
| * Get rid of any current settings if requested; not just the |
| * well-known methods but any extensions as well. |
| */ |
| if (reset) { |
| ap_clear_method_list(r->allowed_methods); |
| } |
| |
| va_start(methods, reset); |
| while ((method = va_arg(methods, const char *)) != NULL) { |
| ap_method_list_add(r->allowed_methods, method); |
| } |
| } |
