+++ /dev/null
-/* 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"
-
-#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"
-#include "scoreboard.h"
-
-#if APR_HAVE_STDARG_H
-#include <stdarg.h>
-#endif
-
-/*****************************************************************
- *
- * 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;
- }
-}
-
-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;
- request_rec *r_1st_err = r;
-
- 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_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! */
- }
-
- 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;
- 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_ERR, 0, r,
- "Invalid error redirection directive: %s",
- custom_response);
- }
- }
- ap_send_error_response(r_1st_err, recursive_error);
-}
-
-static void check_pipeline_flush(request_rec *r)
-{
- conn_rec *c = r->connection;
- /* ### 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, c->bucket_alloc);
-
- /* 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? */
- /* ### is zero correct? that means "read one line" */
- if (r->connection->keepalive == AP_CONN_CLOSE ||
- ap_get_brigade(r->input_filters, bb, AP_MODE_EATCRLF,
- APR_NONBLOCK_READ, 0) != APR_SUCCESS) {
- apr_bucket *e = apr_bucket_flush_create(c->bucket_alloc);
-
- /* 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.
- */
- if (ap_extended_status)
- ap_time_process_request(r->connection->sbh, START_PREQUEST);
- 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 == DONE) {
- /* e.g., something not in storage like TRACE */
- access_status = OK;
- }
-
- if (access_status == OK) {
- ap_finalize_request_protocol(r);
- }
- else {
- r->status = HTTP_OK;
- 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_update_child_status(r->connection->sbh, SERVER_BUSY_LOG, r);
- ap_run_log_transaction(r);
- if (ap_extended_status)
- ap_time_process_request(r->connection->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;
-
- 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->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->proto_output_filters = r->proto_output_filters;
- new->proto_input_filters = r->proto_input_filters;
-
- new->output_filters = new->proto_output_filters;
- new->input_filters = new->proto_input_filters;
-
- if (new->main) {
- /* Add back the subrequest filter, which we lost when
- * we set output_filters to include only the protocol
- * output filters from the original request.
- */
- ap_add_output_filter_handle(ap_subreq_core_filter_handle,
- NULL, new, new->connection);
- }
-
- 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));
-
- /*
- * 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;
-}
-
-/* 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->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 (r->main) {
- ap_add_output_filter_handle(ap_subreq_core_filter_handle,
- NULL, r, r->connection);
- }
- else if (r->output_filters->frec == ap_subreq_core_filter_handle) {
- ap_remove_output_filter(r->output_filters);
- r->output_filters = r->output_filters->next;
- }
-
- /* 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);
-}
-
-AP_DECLARE(void) ap_internal_redirect(const char *new_uri, request_rec *r)
-{
- request_rec *new = internal_internal_redirect(new_uri, r);
- int access_status;
-
- /* ap_die was already called, if an error occured */
- if (!new) {
- return;
- }
-
- access_status = ap_process_request_internal(new);
- if (access_status == OK) {
- if ((access_status = ap_invoke_handler(new)) != 0) {
- ap_die(access_status, new);
- return;
- }
- ap_finalize_request_protocol(new);
- }
- else {
- 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) {
- if ((access_status = ap_invoke_handler(new)) != 0) {
- ap_die(access_status, new);
- return;
- }
- ap_finalize_request_protocol(new);
- }
- else {
- 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;
-}
Code Review / bottlenecks.git / blobdiff