296 lines
9.3 KiB
C
296 lines
9.3 KiB
C
/* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "apr_strings.h"
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#include "httpd.h"
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#include "http_config.h"
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#include "http_log.h"
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#include "http_protocol.h"
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#include "http_request.h"
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#include "ap_expr.h"
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extern module AP_MODULE_DECLARE_DATA log_debug_module;
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typedef struct {
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ap_expr_info_t *msg_expr;
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ap_expr_info_t *condition;
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const char *hook;
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} msg_entry;
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typedef struct {
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apr_array_header_t *entries;
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} log_debug_dirconf;
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static const char *allhooks = "all";
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static const char * const hooks[] = {
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"log_transaction", /* 0 */
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"quick_handler", /* 1 */
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"handler", /* 2 */
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"translate_name", /* 3 */
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"map_to_storage", /* 4 */
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"fixups", /* 5 */
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"type_checker", /* 6 */
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"check_access", /* 7 */
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"check_access_ex", /* 8 */
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"check_authn", /* 9 */
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"check_authz", /* 10 */
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"insert_filter", /* 11 */
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"pre_translate_name", /* 12 */
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NULL
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};
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static void do_debug_log(request_rec *r, const char *hookname)
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{
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log_debug_dirconf *dconf = ap_get_module_config(r->per_dir_config, &log_debug_module);
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int i;
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if (dconf->entries == NULL)
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return;
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for (i = 0; i < dconf->entries->nelts; i++) {
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const char *msg, *err;
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msg_entry *entry = APR_ARRAY_IDX(dconf->entries, i, msg_entry *);
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if (entry->hook != allhooks && entry->hook != hookname)
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continue;
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if (entry->condition) {
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int ret = ap_expr_exec(r, entry->condition, &err);
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if (err) {
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ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00640)
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"Can't evaluate condition: %s", err);
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continue;
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}
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if (!ret)
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continue;
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}
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msg = ap_expr_str_exec(r, entry->msg_expr, &err);
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if (err)
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ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00641)
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"Can't evaluate message expression: %s", err);
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if (APLOGrdebug(r))
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/* Intentional no APLOGNO */
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ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
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"%s (%s hook, %s:%d)",
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msg, hookname, entry->msg_expr->filename,
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entry->msg_expr->line_number);
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else
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/* Intentional no APLOGNO */
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ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
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"%s", msg);
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}
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}
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static int log_debug_log_transaction(request_rec *r)
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{
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do_debug_log(r, hooks[0]);
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return DECLINED;
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}
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static int log_debug_quick_handler(request_rec *r, int lookup_uri)
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{
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do_debug_log(r, hooks[1]);
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return DECLINED;
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}
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static int log_debug_handler(request_rec *r)
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{
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do_debug_log(r, hooks[2]);
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return DECLINED;
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}
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static int log_debug_pre_translate_name(request_rec *r)
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{
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do_debug_log(r, hooks[12]);
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return DECLINED;
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}
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static int log_debug_translate_name(request_rec *r)
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{
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do_debug_log(r, hooks[3]);
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return DECLINED;
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}
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static int log_debug_map_to_storage(request_rec *r)
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{
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do_debug_log(r, hooks[4]);
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return DECLINED;
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}
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static int log_debug_fixups(request_rec *r)
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{
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do_debug_log(r, hooks[5]);
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return DECLINED;
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}
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static int log_debug_type_checker(request_rec *r)
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{
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do_debug_log(r, hooks[6]);
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return DECLINED;
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}
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static int log_debug_check_access(request_rec *r)
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{
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do_debug_log(r, hooks[7]);
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return DECLINED;
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}
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static int log_debug_check_access_ex(request_rec *r)
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{
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do_debug_log(r, hooks[8]);
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return DECLINED;
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}
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static int log_debug_check_authn(request_rec *r)
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{
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do_debug_log(r, hooks[9]);
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return DECLINED;
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}
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static int log_debug_check_authz(request_rec *r)
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{
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do_debug_log(r, hooks[10]);
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return DECLINED;
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}
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static void log_debug_insert_filter(request_rec *r)
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{
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do_debug_log(r, hooks[11]);
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}
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static void *log_debug_create_dconf(apr_pool_t *p, char *dirspec)
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{
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log_debug_dirconf *dconf = apr_pcalloc(p, sizeof(log_debug_dirconf));
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return dconf;
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}
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static void *log_debug_merge_dconf(apr_pool_t *p, void *parent_conf, void *new_conf)
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{
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log_debug_dirconf *merged = apr_pcalloc(p, sizeof(log_debug_dirconf));
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const log_debug_dirconf *parent = parent_conf;
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const log_debug_dirconf *new = new_conf;
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if (parent->entries == NULL)
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merged->entries = new->entries;
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else if (new->entries == NULL)
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merged->entries = parent->entries;
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else
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/* apr_array_append actually creates a new array */
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merged->entries = apr_array_append(p, parent->entries, new->entries);
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return merged;
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}
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static const char *cmd_log_message(cmd_parms *cmd, void *dconf_, const char *arg1,
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const char *arg2, const char *arg3)
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{
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msg_entry *entry = apr_pcalloc(cmd->pool, sizeof(msg_entry));
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log_debug_dirconf *dconf = dconf_;
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int i, j;
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const char *err;
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const char *args[2];
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args[0] = arg2;
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args[1] = arg3;
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entry->msg_expr = ap_expr_parse_cmd(cmd, arg1, AP_EXPR_FLAG_STRING_RESULT|
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AP_EXPR_FLAG_DONT_VARY,
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&err, NULL);
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if (err)
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return apr_psprintf(cmd->pool,
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"Could not parse message expression '%s': %s",
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arg1, err);
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for (i = 0; i < 2; i++) {
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if (args[i] == NULL)
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break;
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if (strncasecmp(args[i], "hook=", 5) == 0) {
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const char *name = args[i] + 5;
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j = 0;
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while (hooks[j]) {
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if (strcasecmp(hooks[j], name) == 0) {
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entry->hook = hooks[j];
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break;
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}
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j++;
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}
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if (entry->hook == NULL) {
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if (strcmp(name, "*") == 0 || strcasecmp(name, allhooks) == 0)
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entry->hook = allhooks;
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else
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return apr_psprintf(cmd->pool, "Invalid hook name: %s", name);
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}
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}
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else if (strncasecmp(args[i], "expr=", 5) == 0) {
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const char *expr = args[i] + 5;
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entry->condition = ap_expr_parse_cmd(cmd, expr,
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AP_EXPR_FLAG_DONT_VARY,
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&err, NULL);
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if (err)
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return apr_psprintf(cmd->pool,
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"Could not parse expression '%s': %s",
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expr, err);
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}
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else {
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return apr_psprintf(cmd->pool, "Invalid argument %s", args[i]);
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}
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}
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if (entry->hook == NULL)
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entry->hook = hooks[0];
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if (!dconf->entries)
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dconf->entries = apr_array_make(cmd->pool, 4, sizeof(msg_entry *));
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APR_ARRAY_PUSH(dconf->entries, msg_entry *) = entry;
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return NULL;
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}
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static const command_rec log_debug_cmds[] =
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{
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AP_INIT_TAKE123("LogMessage", cmd_log_message, NULL, RSRC_CONF|ACCESS_CONF,
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"Log a debug message to the error log if this config block is used for "
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" a request"),
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{NULL}
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};
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static void register_hooks(apr_pool_t *p)
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{
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ap_hook_log_transaction(log_debug_log_transaction, NULL, NULL, APR_HOOK_FIRST);
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ap_hook_quick_handler(log_debug_quick_handler, NULL, NULL, APR_HOOK_FIRST);
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ap_hook_handler(log_debug_handler, NULL, NULL, APR_HOOK_FIRST);
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ap_hook_pre_translate_name(log_debug_pre_translate_name, NULL, NULL, APR_HOOK_FIRST);
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ap_hook_translate_name(log_debug_translate_name, NULL, NULL, APR_HOOK_FIRST);
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ap_hook_map_to_storage(log_debug_map_to_storage, NULL, NULL, APR_HOOK_FIRST);
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ap_hook_fixups(log_debug_fixups, NULL, NULL, APR_HOOK_FIRST);
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ap_hook_type_checker(log_debug_type_checker, NULL, NULL, APR_HOOK_FIRST);
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ap_hook_check_access(log_debug_check_access, NULL, NULL, APR_HOOK_FIRST, AP_AUTH_INTERNAL_PER_URI);
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ap_hook_check_access_ex(log_debug_check_access_ex, NULL, NULL, APR_HOOK_FIRST, AP_AUTH_INTERNAL_PER_URI);
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ap_hook_check_authn(log_debug_check_authn, NULL, NULL, APR_HOOK_FIRST, AP_AUTH_INTERNAL_PER_URI);
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ap_hook_check_authz(log_debug_check_authz, NULL, NULL, APR_HOOK_FIRST, AP_AUTH_INTERNAL_PER_URI);
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ap_hook_insert_filter(log_debug_insert_filter, NULL, NULL, APR_HOOK_FIRST);
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}
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AP_DECLARE_MODULE(log_debug) =
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{
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STANDARD20_MODULE_STUFF,
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log_debug_create_dconf, /* create per-dir config */
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log_debug_merge_dconf, /* merge per-dir config */
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NULL, /* server config */
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NULL, /* merge server config */
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log_debug_cmds, /* command apr_table_t */
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register_hooks /* register hooks */
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};
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