| /* 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_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" |
| |
| #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 "scoreboard.h" |
| |
| #include "mod_core.h" |
| |
| #if APR_HAVE_STDARG_H |
| #include <stdarg.h> |
| #endif |
| |
| APLOG_USE_MODULE(http); |
| |
| /***************************************************************** |
| * |
| * Mainline request processing... |
| */ |
| |
| /* XXX A cleaner and faster way to do this might be to pass the request_rec |
| * down the filter chain as a parameter. It would need to change for |
| * subrequest vs. main request filters; perhaps the subrequest filter could |
| * make the switch. |
| */ |
| static void update_r_in_filters(ap_filter_t *f, |
| request_rec *from, |
| request_rec *to) |
| { |
| while (f) { |
| if (f->r == from) { |
| f->r = to; |
| } |
| f = f->next; |
| } |
| } |
| |
| static void ap_die_r(int type, request_rec *r, int recursive_error) |
| { |
| char *custom_response; |
| request_rec *r_1st_err = r; |
| |
| if (type == OK || type == DONE) { |
| ap_finalize_request_protocol(r); |
| return; |
| } |
| |
| if (!ap_is_HTTP_VALID_RESPONSE(type)) { |
| ap_filter_t *next; |
| |
| /* |
| * Check if we still have the ap_http_header_filter in place. If |
| * this is the case we should not ignore the error here because |
| * it means that we have not sent any response at all and never |
| * will. This is bad. Sent an internal server error instead. |
| */ |
| next = r->output_filters; |
| while (next && (next->frec != ap_http_header_filter_handle)) { |
| next = next->next; |
| } |
| |
| /* |
| * If next != NULL then we left the while above because of |
| * next->frec == ap_http_header_filter |
| */ |
| if (next) { |
| if (type != AP_FILTER_ERROR) { |
| ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01579) |
| "Invalid response status %i", type); |
| } |
| else { |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02831) |
| "Response from AP_FILTER_ERROR"); |
| } |
| type = HTTP_INTERNAL_SERVER_ERROR; |
| } |
| else { |
| 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 (recursive_error != HTTP_OK) { |
| while (r_1st_err->prev && (r_1st_err->prev->status != HTTP_OK)) |
| r_1st_err = r_1st_err->prev; /* Get back to original error */ |
| |
| if (r_1st_err != r) { |
| /* The recursive error was caused by an ErrorDocument specifying |
| * an internal redirect to a bad URI. ap_internal_redirect has |
| * changed the filter chains to point to the ErrorDocument's |
| * request_rec. Back out those changes so we can safely use the |
| * original failing request_rec to send the canned error message. |
| * |
| * ap_send_error_response gets rid of existing resource filters |
| * on the output side, so we can skip those. |
| */ |
| update_r_in_filters(r_1st_err->proto_output_filters, r, r_1st_err); |
| update_r_in_filters(r_1st_err->input_filters, r, r_1st_err); |
| } |
| |
| custom_response = NULL; /* Do NOT retry the custom thing! */ |
| } |
| else { |
| int error_index = ap_index_of_response(type); |
| custom_response = ap_response_code_string(r, error_index); |
| recursive_error = 0; |
| } |
| |
| 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 don't want to keep the connection, make sure we mark that the |
| * connection is not eligible for keepalive. If we want to keep the |
| * connection, be sure that the request body (if any) has been read. |
| */ |
| if (ap_status_drops_connection(r->status)) { |
| r->connection->keepalive = AP_CONN_CLOSE; |
| } |
| |
| /* |
| * 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, *original_method; |
| int original_method_number; |
| 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); |
| } |
| original_method = r->method; |
| original_method_number = r->method_number; |
| r->method = "GET"; |
| r->method_number = M_GET; |
| ap_internal_redirect(custom_response, r); |
| /* preserve ability to see %<m in the access log */ |
| r->method = original_method; |
| r->method_number = original_method_number; |
| 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_ERR, 0, r, APLOGNO(01580) |
| "Invalid error redirection directive: %s", |
| custom_response); |
| } |
| } |
| ap_send_error_response(r_1st_err, recursive_error); |
| } |
| |
| AP_DECLARE(void) ap_die(int type, request_rec *r) |
| { |
| ap_die_r(type, r, r->status); |
| } |
| |
| AP_DECLARE(apr_status_t) ap_check_pipeline(conn_rec *c, apr_bucket_brigade *bb, |
| unsigned int max_blank_lines) |
| { |
| apr_status_t rv = APR_EOF; |
| ap_input_mode_t mode = AP_MODE_SPECULATIVE; |
| unsigned int num_blank_lines = 0; |
| apr_size_t cr = 0; |
| char buf[2]; |
| |
| while (c->keepalive != AP_CONN_CLOSE && !c->aborted) { |
| apr_size_t len = cr + 1; |
| |
| apr_brigade_cleanup(bb); |
| rv = ap_get_brigade(c->input_filters, bb, mode, |
| APR_NONBLOCK_READ, len); |
| if (rv != APR_SUCCESS || APR_BRIGADE_EMPTY(bb)) { |
| if (mode == AP_MODE_READBYTES) { |
| /* Unexpected error, stop with this connection */ |
| ap_log_cerror(APLOG_MARK, APLOG_ERR, rv, c, APLOGNO(02967) |
| "Can't consume pipelined empty lines"); |
| c->keepalive = AP_CONN_CLOSE; |
| rv = APR_EGENERAL; |
| } |
| else if (rv != APR_SUCCESS && !APR_STATUS_IS_EAGAIN(rv)) { |
| /* Pipe is dead */ |
| c->keepalive = AP_CONN_CLOSE; |
| } |
| else { |
| /* Pipe is up and empty */ |
| rv = APR_EAGAIN; |
| } |
| break; |
| } |
| if (!max_blank_lines) { |
| apr_off_t n = 0; |
| /* Single read asked, (non-meta-)data available? */ |
| rv = apr_brigade_length(bb, 0, &n); |
| if (rv == APR_SUCCESS && n <= 0) { |
| rv = APR_EAGAIN; |
| } |
| break; |
| } |
| |
| /* Lookup and consume blank lines */ |
| rv = apr_brigade_flatten(bb, buf, &len); |
| if (rv != APR_SUCCESS || len != cr + 1) { |
| int log_level; |
| if (mode == AP_MODE_READBYTES) { |
| /* Unexpected error, stop with this connection */ |
| c->keepalive = AP_CONN_CLOSE; |
| log_level = APLOG_ERR; |
| rv = APR_EGENERAL; |
| } |
| else { |
| /* Let outside (non-speculative/blocking) read determine |
| * where this possible failure comes from (metadata, |
| * morphed EOF socket, ...). Debug only here. |
| */ |
| log_level = APLOG_DEBUG; |
| rv = APR_SUCCESS; |
| } |
| ap_log_cerror(APLOG_MARK, log_level, rv, c, APLOGNO(02968) |
| "Can't check pipelined data"); |
| break; |
| } |
| |
| if (mode == AP_MODE_READBYTES) { |
| /* [CR]LF consumed, try next */ |
| mode = AP_MODE_SPECULATIVE; |
| cr = 0; |
| } |
| else if (cr) { |
| AP_DEBUG_ASSERT(len == 2 && buf[0] == APR_ASCII_CR); |
| if (buf[1] == APR_ASCII_LF) { |
| /* consume this CRLF */ |
| mode = AP_MODE_READBYTES; |
| num_blank_lines++; |
| } |
| else { |
| /* CR(?!LF) is data */ |
| break; |
| } |
| } |
| else { |
| if (buf[0] == APR_ASCII_LF) { |
| /* consume this LF */ |
| mode = AP_MODE_READBYTES; |
| num_blank_lines++; |
| } |
| else if (buf[0] == APR_ASCII_CR) { |
| cr = 1; |
| } |
| else { |
| /* Not [CR]LF, some data */ |
| break; |
| } |
| } |
| if (num_blank_lines > max_blank_lines) { |
| /* Enough blank lines with this connection, |
| * stop and don't recycle it. |
| */ |
| c->keepalive = AP_CONN_CLOSE; |
| rv = APR_NOTFOUND; |
| break; |
| } |
| } |
| |
| return rv; |
| } |
| |
| #define RETRIEVE_BRIGADE_FROM_POOL(bb, key, pool, allocator) do { \ |
| apr_pool_userdata_get((void **)&bb, key, pool); \ |
| if (bb == NULL) { \ |
| bb = apr_brigade_create(pool, allocator); \ |
| apr_pool_userdata_setn((const void *)bb, key, NULL, pool); \ |
| } \ |
| else { \ |
| apr_brigade_cleanup(bb); \ |
| } \ |
| } while(0) |
| |
| AP_DECLARE(void) ap_process_request_after_handler(request_rec *r) |
| { |
| apr_bucket_brigade *bb; |
| apr_bucket *b; |
| conn_rec *c = r->connection; |
| apr_status_t rv; |
| |
| /* Send an EOR bucket through the output filter chain. When |
| * this bucket is destroyed, the request will be logged and |
| * its pool will be freed |
| */ |
| RETRIEVE_BRIGADE_FROM_POOL(bb, "ap_process_request_after_handler_brigade", |
| c->pool, c->bucket_alloc); |
| b = ap_bucket_eor_create(c->bucket_alloc, r); |
| APR_BRIGADE_INSERT_HEAD(bb, b); |
| |
| ap_pass_brigade(c->output_filters, bb); |
| |
| /* The EOR bucket has either been handled by an output filter (eg. |
| * deleted or moved to a buffered_bb => no more in bb), or an error |
| * occured before that (eg. c->aborted => still in bb) and we ought |
| * to destroy it now. So cleanup any remaining bucket along with |
| * the orphan request (if any). |
| */ |
| apr_brigade_cleanup(bb); |
| |
| /* From here onward, it is no longer safe to reference r |
| * or r->pool, because r->pool may have been destroyed |
| * already by the EOR bucket's cleanup function. |
| */ |
| |
| /* Check pipeline consuming blank lines, they must not be interpreted as |
| * the next pipelined request, otherwise we would block on the next read |
| * without flushing data, and hence possibly delay pending response(s) |
| * until the next/real request comes in or the keepalive timeout expires. |
| */ |
| rv = ap_check_pipeline(c, bb, DEFAULT_LIMIT_BLANK_LINES); |
| c->data_in_input_filters = (rv == APR_SUCCESS); |
| apr_brigade_cleanup(bb); |
| |
| if (c->cs) |
| c->cs->state = (c->aborted) ? CONN_STATE_LINGER |
| : CONN_STATE_WRITE_COMPLETION; |
| AP_PROCESS_REQUEST_RETURN((uintptr_t)r, r->uri, r->status); |
| if (ap_extended_status) { |
| ap_time_process_request(c->sbh, STOP_PREQUEST); |
| } |
| } |
| |
| void ap_process_async_request(request_rec *r) |
| { |
| conn_rec *c = r->connection; |
| 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. |
| */ |
| AP_PROCESS_REQUEST_ENTRY((uintptr_t)r, r->uri); |
| if (ap_extended_status) { |
| ap_time_process_request(r->connection->sbh, START_PREQUEST); |
| } |
| |
| if (APLOGrtrace4(r)) { |
| int i; |
| const apr_array_header_t *t_h = apr_table_elts(r->headers_in); |
| const apr_table_entry_t *t_elt = (apr_table_entry_t *)t_h->elts; |
| ap_log_rerror(APLOG_MARK, APLOG_TRACE4, 0, r, |
| "Headers received from client:"); |
| for (i = 0; i < t_h->nelts; i++, t_elt++) { |
| ap_log_rerror(APLOG_MARK, APLOG_TRACE4, 0, r, " %s: %s", |
| ap_escape_logitem(r->pool, t_elt->key), |
| ap_escape_logitem(r->pool, t_elt->val)); |
| } |
| } |
| |
| #if APR_HAS_THREADS |
| apr_thread_mutex_create(&r->invoke_mtx, APR_THREAD_MUTEX_DEFAULT, r->pool); |
| apr_thread_mutex_lock(r->invoke_mtx); |
| #endif |
| access_status = ap_run_quick_handler(r, 0); /* Not a look-up request */ |
| if (access_status == DECLINED) { |
| access_status = ap_process_request_internal(r); |
| if (access_status == OK) { |
| access_status = ap_invoke_handler(r); |
| } |
| } |
| |
| if (access_status == SUSPENDED) { |
| /* TODO: Should move these steps into a generic function, so modules |
| * working on a suspended request can also call _ENTRY again. |
| */ |
| AP_PROCESS_REQUEST_RETURN((uintptr_t)r, r->uri, access_status); |
| if (ap_extended_status) { |
| ap_time_process_request(c->sbh, STOP_PREQUEST); |
| } |
| if (c->cs) |
| c->cs->state = CONN_STATE_SUSPENDED; |
| #if APR_HAS_THREADS |
| apr_thread_mutex_unlock(r->invoke_mtx); |
| #endif |
| return; |
| } |
| #if APR_HAS_THREADS |
| apr_thread_mutex_unlock(r->invoke_mtx); |
| #endif |
| |
| ap_die_r(access_status, r, HTTP_OK); |
| |
| ap_process_request_after_handler(r); |
| } |
| |
| AP_DECLARE(void) ap_process_request(request_rec *r) |
| { |
| apr_bucket_brigade *bb; |
| apr_bucket *b; |
| conn_rec *c = r->connection; |
| apr_status_t rv; |
| |
| ap_process_async_request(r); |
| |
| if (!c->data_in_input_filters) { |
| RETRIEVE_BRIGADE_FROM_POOL(bb, "ap_process_request_brigade", |
| c->pool, c->bucket_alloc); |
| b = apr_bucket_flush_create(c->bucket_alloc); |
| APR_BRIGADE_INSERT_HEAD(bb, b); |
| rv = ap_pass_brigade(c->output_filters, bb); |
| if (APR_STATUS_IS_TIMEUP(rv)) { |
| /* |
| * Notice a timeout as an error message. This might be |
| * valuable for detecting clients with broken network |
| * connections or possible DoS attacks. |
| */ |
| ap_log_cerror(APLOG_MARK, APLOG_INFO, rv, c, APLOGNO(01581) |
| "flushing data to the client"); |
| } |
| apr_brigade_cleanup(bb); |
| } |
| if (ap_extended_status) { |
| ap_time_process_request(c->sbh, STOP_PREQUEST); |
| } |
| } |
| |
| static apr_table_t *rename_original_env(apr_pool_t *p, apr_table_t *t) |
| { |
| const apr_array_header_t *env_arr = apr_table_elts(t); |
| const apr_table_entry_t *elts = (const 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; |
| const char *vary_header; |
| |
| if (ap_is_recursion_limit_exceeded(r)) { |
| ap_die(HTTP_INTERNAL_SERVER_ERROR, r); |
| return NULL; |
| } |
| |
| 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->parsed_uri.port_str = r->parsed_uri.port_str; |
| new->parsed_uri.port = r->parsed_uri.port; |
| |
| new->request_config = ap_create_request_config(r->pool); |
| |
| new->per_dir_config = r->server->lookup_defaults; |
| |
| new->prev = r; |
| r->next = new; |
| |
| new->useragent_addr = r->useragent_addr; |
| new->useragent_ip = r->useragent_ip; |
| |
| /* 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->trailers_in = r->trailers_in; |
| new->headers_out = apr_table_make(r->pool, 12); |
| if (ap_is_HTTP_REDIRECT(new->status)) { |
| const char *location = apr_table_get(r->headers_out, "Location"); |
| if (location) |
| apr_table_setn(new->headers_out, "Location", location); |
| } |
| |
| /* A module (like mod_rewrite) can force an internal redirect |
| * to carry over the Vary header (if present). |
| */ |
| if (apr_table_get(r->notes, "redirect-keeps-vary")) { |
| if((vary_header = apr_table_get(r->headers_out, "Vary"))) { |
| apr_table_setn(new->headers_out, "Vary", vary_header); |
| } |
| } |
| |
| new->err_headers_out = r->err_headers_out; |
| new->trailers_out = apr_table_make(r->pool, 5); |
| new->subprocess_env = rename_original_env(r->pool, r->subprocess_env); |
| new->notes = apr_table_make(r->pool, 5); |
| |
| 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->proto_output_filters = r->proto_output_filters; |
| new->proto_input_filters = r->proto_input_filters; |
| |
| new->input_filters = new->proto_input_filters; |
| |
| if (new->main) { |
| ap_filter_t *f, *nextf; |
| |
| /* If this is a subrequest, the filter chain may contain a |
| * mixture of filters specific to the old request (r), and |
| * some inherited from r->main. Here, inherit that filter |
| * chain, and remove all those which are specific to the old |
| * request; ensuring the subreq filter is left in place. */ |
| new->output_filters = r->output_filters; |
| |
| f = new->output_filters; |
| do { |
| nextf = f->next; |
| |
| if (f->r == r && f->frec != ap_subreq_core_filter_handle) { |
| ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01582) |
| "dropping filter '%s' in internal redirect from %s to %s", |
| f->frec->name, r->unparsed_uri, new_uri); |
| |
| /* To remove the filter, first set f->r to the *new* |
| * request_rec, so that ->output_filters on 'new' is |
| * changed (if necessary) when removing the filter. */ |
| f->r = new; |
| ap_remove_output_filter(f); |
| } |
| |
| f = nextf; |
| |
| /* Stop at the protocol filters. If a protocol filter has |
| * been newly installed for this resource, better leave it |
| * in place, though it's probably a misconfiguration or |
| * filter bug to get into this state. */ |
| } while (f && f != new->proto_output_filters); |
| } |
| else { |
| /* If this is not a subrequest, clear out all |
| * resource-specific filters. */ |
| new->output_filters = new->proto_output_filters; |
| } |
| |
| update_r_in_filters(new->input_filters, r, new); |
| update_r_in_filters(new->output_filters, r, new); |
| |
| apr_table_setn(new->subprocess_env, "REDIRECT_STATUS", |
| apr_itoa(r->pool, r->status)); |
| |
| /* Begin by presuming any module can make its own path_info assumptions, |
| * until some module interjects and changes the value. |
| */ |
| new->used_path_info = AP_REQ_DEFAULT_PATH_INFO; |
| |
| #if APR_HAS_THREADS |
| new->invoke_mtx = r->invoke_mtx; |
| #endif |
| |
| /* |
| * 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_post_read_request(new))) { |
| ap_die(access_status, new); |
| return NULL; |
| } |
| |
| return new; |
| } |
| |
| /* XXX: Is this function is so bogus and fragile that we deep-6 it? */ |
| AP_DECLARE(void) ap_internal_fast_redirect(request_rec *rr, request_rec *r) |
| { |
| /* We need to tell POOL_DEBUG that we're guaranteeing that rr->pool |
| * will exist as long as r->pool. Otherwise we run into troubles because |
| * some values in this request will be allocated in r->pool, and others in |
| * rr->pool. |
| */ |
| apr_pool_join(r->pool, rr->pool); |
| r->proxyreq = rr->proxyreq; |
| r->no_cache = (r->no_cache && rr->no_cache); |
| r->no_local_copy = (r->no_local_copy && rr->no_local_copy); |
| r->mtime = rr->mtime; |
| r->uri = rr->uri; |
| r->filename = rr->filename; |
| r->canonical_filename = rr->canonical_filename; |
| r->path_info = rr->path_info; |
| r->args = rr->args; |
| r->finfo = rr->finfo; |
| r->handler = rr->handler; |
| ap_set_content_type(r, rr->content_type); |
| r->content_encoding = rr->content_encoding; |
| r->content_languages = rr->content_languages; |
| r->per_dir_config = rr->per_dir_config; |
| /* copy output headers from subrequest, but leave negotiation headers */ |
| r->notes = apr_table_overlay(r->pool, rr->notes, r->notes); |
| r->headers_out = apr_table_overlay(r->pool, rr->headers_out, |
| r->headers_out); |
| r->err_headers_out = apr_table_overlay(r->pool, rr->err_headers_out, |
| r->err_headers_out); |
| r->trailers_out = apr_table_overlay(r->pool, rr->trailers_out, |
| r->trailers_out); |
| r->subprocess_env = apr_table_overlay(r->pool, rr->subprocess_env, |
| r->subprocess_env); |
| |
| r->output_filters = rr->output_filters; |
| r->input_filters = rr->input_filters; |
| |
| /* If any filters pointed at the now-defunct rr, we must point them |
| * at our "new" instance of r. In particular, some of rr's structures |
| * will now be bogus (say rr->headers_out). If a filter tried to modify |
| * their f->r structure when it is pointing to rr, the real request_rec |
| * will not get updated. Fix that here. |
| */ |
| update_r_in_filters(r->input_filters, rr, r); |
| update_r_in_filters(r->output_filters, rr, r); |
| |
| if (r->main) { |
| ap_filter_t *next = r->output_filters; |
| while (next && (next != r->proto_output_filters)) { |
| if (next->frec == ap_subreq_core_filter_handle) { |
| break; |
| } |
| next = next->next; |
| } |
| if (!next || next == r->proto_output_filters) { |
| ap_add_output_filter_handle(ap_subreq_core_filter_handle, |
| NULL, r, r->connection); |
| } |
| } |
| else { |
| /* |
| * We need to check if we now have the SUBREQ_CORE filter in our filter |
| * chain. If this is the case we need to remove it since we are NO |
| * subrequest. But we need to keep in mind that the SUBREQ_CORE filter |
| * does not necessarily need to be the first filter in our chain. So we |
| * need to go through the chain. But we only need to walk up the chain |
| * until the proto_output_filters as the SUBREQ_CORE filter is below the |
| * protocol filters. |
| */ |
| ap_filter_t *next; |
| |
| next = r->output_filters; |
| while (next && (next->frec != ap_subreq_core_filter_handle) |
| && (next != r->proto_output_filters)) { |
| next = next->next; |
| } |
| if (next && (next->frec == ap_subreq_core_filter_handle)) { |
| ap_remove_output_filter(next); |
| } |
| } |
| } |
| |
| AP_DECLARE(void) ap_internal_redirect(const char *new_uri, request_rec *r) |
| { |
| int access_status; |
| request_rec *new = internal_internal_redirect(new_uri, r); |
| |
| AP_INTERNAL_REDIRECT(r->uri, new_uri); |
| |
| /* ap_die was already called, if an error occured */ |
| if (!new) { |
| return; |
| } |
| |
| access_status = ap_run_quick_handler(new, 0); /* Not a look-up request */ |
| if (access_status == DECLINED) { |
| access_status = ap_process_request_internal(new); |
| if (access_status == OK) { |
| access_status = ap_invoke_handler(new); |
| } |
| } |
| ap_die(access_status, 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) |
| { |
| int access_status; |
| request_rec *new = internal_internal_redirect(new_uri, r); |
| |
| /* ap_die was already called, if an error occured */ |
| if (!new) { |
| return; |
| } |
| |
| if (r->handler) |
| ap_set_content_type(new, r->content_type); |
| access_status = ap_process_request_internal(new); |
| if (access_status == OK) { |
| access_status = ap_invoke_handler(new); |
| } |
| ap_die(access_status, 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); |
| } |
| va_end(methods); |
| } |
| |
| AP_DECLARE(void) ap_allow_standard_methods(request_rec *r, int reset, ...) |
| { |
| int method; |
| va_list methods; |
| apr_int64_t mask; |
| |
| /* |
| * 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); |
| } |
| |
| mask = 0; |
| va_start(methods, reset); |
| while ((method = va_arg(methods, int)) != -1) { |
| mask |= (AP_METHOD_BIT << method); |
| } |
| va_end(methods); |
| |
| r->allowed_methods->method_mask |= mask; |
| } |
