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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 06:33:50 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 06:33:50 +0000
commitfe39ffb8b90ae4e002ed73fe98617cd590abb467 (patch)
treeb80e5956907d8aeaaffe4e4f0c068c0e6157ce8b /modules/loggers/mod_log_debug.c
parentInitial commit. (diff)
downloadapache2-fe39ffb8b90ae4e002ed73fe98617cd590abb467.tar.xz
apache2-fe39ffb8b90ae4e002ed73fe98617cd590abb467.zip
Adding upstream version 2.4.56.upstream/2.4.56upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'modules/loggers/mod_log_debug.c')
-rw-r--r--modules/loggers/mod_log_debug.c295
1 files changed, 295 insertions, 0 deletions
diff --git a/modules/loggers/mod_log_debug.c b/modules/loggers/mod_log_debug.c
new file mode 100644
index 0000000..3f27a95
--- /dev/null
+++ b/modules/loggers/mod_log_debug.c
@@ -0,0 +1,295 @@
+/* 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.
+ */
+
+#include "apr_strings.h"
+
+#include "httpd.h"
+#include "http_config.h"
+#include "http_log.h"
+#include "http_protocol.h"
+#include "http_request.h"
+#include "ap_expr.h"
+
+extern module AP_MODULE_DECLARE_DATA log_debug_module;
+
+typedef struct {
+ ap_expr_info_t *msg_expr;
+ ap_expr_info_t *condition;
+ const char *hook;
+} msg_entry;
+
+typedef struct {
+ apr_array_header_t *entries;
+} log_debug_dirconf;
+
+static const char *allhooks = "all";
+static const char * const hooks[] = {
+ "log_transaction", /* 0 */
+ "quick_handler", /* 1 */
+ "handler", /* 2 */
+ "translate_name", /* 3 */
+ "map_to_storage", /* 4 */
+ "fixups", /* 5 */
+ "type_checker", /* 6 */
+ "check_access", /* 7 */
+ "check_access_ex", /* 8 */
+ "check_authn", /* 9 */
+ "check_authz", /* 10 */
+ "insert_filter", /* 11 */
+ "pre_translate_name", /* 12 */
+ NULL
+};
+
+static void do_debug_log(request_rec *r, const char *hookname)
+{
+ log_debug_dirconf *dconf = ap_get_module_config(r->per_dir_config, &log_debug_module);
+ int i;
+ if (dconf->entries == NULL)
+ return;
+
+ for (i = 0; i < dconf->entries->nelts; i++) {
+ const char *msg, *err;
+ msg_entry *entry = APR_ARRAY_IDX(dconf->entries, i, msg_entry *);
+ if (entry->hook != allhooks && entry->hook != hookname)
+ continue;
+ if (entry->condition) {
+ int ret = ap_expr_exec(r, entry->condition, &err);
+ if (err) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00640)
+ "Can't evaluate condition: %s", err);
+ continue;
+ }
+ if (!ret)
+ continue;
+ }
+ msg = ap_expr_str_exec(r, entry->msg_expr, &err);
+ if (err)
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00641)
+ "Can't evaluate message expression: %s", err);
+ if (APLOGrdebug(r))
+ /* Intentional no APLOGNO */
+ ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+ "%s (%s hook, %s:%d)",
+ msg, hookname, entry->msg_expr->filename,
+ entry->msg_expr->line_number);
+ else
+ /* Intentional no APLOGNO */
+ ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+ "%s", msg);
+ }
+}
+
+static int log_debug_log_transaction(request_rec *r)
+{
+ do_debug_log(r, hooks[0]);
+ return DECLINED;
+}
+
+static int log_debug_quick_handler(request_rec *r, int lookup_uri)
+{
+ do_debug_log(r, hooks[1]);
+ return DECLINED;
+}
+
+static int log_debug_handler(request_rec *r)
+{
+ do_debug_log(r, hooks[2]);
+ return DECLINED;
+}
+
+static int log_debug_pre_translate_name(request_rec *r)
+{
+ do_debug_log(r, hooks[12]);
+ return DECLINED;
+}
+
+static int log_debug_translate_name(request_rec *r)
+{
+ do_debug_log(r, hooks[3]);
+ return DECLINED;
+}
+
+static int log_debug_map_to_storage(request_rec *r)
+{
+ do_debug_log(r, hooks[4]);
+ return DECLINED;
+}
+
+static int log_debug_fixups(request_rec *r)
+{
+ do_debug_log(r, hooks[5]);
+ return DECLINED;
+}
+
+static int log_debug_type_checker(request_rec *r)
+{
+ do_debug_log(r, hooks[6]);
+ return DECLINED;
+}
+
+static int log_debug_check_access(request_rec *r)
+{
+ do_debug_log(r, hooks[7]);
+ return DECLINED;
+}
+
+static int log_debug_check_access_ex(request_rec *r)
+{
+ do_debug_log(r, hooks[8]);
+ return DECLINED;
+}
+
+static int log_debug_check_authn(request_rec *r)
+{
+ do_debug_log(r, hooks[9]);
+ return DECLINED;
+}
+
+static int log_debug_check_authz(request_rec *r)
+{
+ do_debug_log(r, hooks[10]);
+ return DECLINED;
+}
+
+static void log_debug_insert_filter(request_rec *r)
+{
+ do_debug_log(r, hooks[11]);
+}
+
+static void *log_debug_create_dconf(apr_pool_t *p, char *dirspec)
+{
+ log_debug_dirconf *dconf = apr_pcalloc(p, sizeof(log_debug_dirconf));
+ return dconf;
+}
+
+static void *log_debug_merge_dconf(apr_pool_t *p, void *parent_conf, void *new_conf)
+{
+ log_debug_dirconf *merged = apr_pcalloc(p, sizeof(log_debug_dirconf));
+ const log_debug_dirconf *parent = parent_conf;
+ const log_debug_dirconf *new = new_conf;
+
+ if (parent->entries == NULL)
+ merged->entries = new->entries;
+ else if (new->entries == NULL)
+ merged->entries = parent->entries;
+ else
+ /* apr_array_append actually creates a new array */
+ merged->entries = apr_array_append(p, parent->entries, new->entries);
+
+ return merged;
+}
+
+static const char *cmd_log_message(cmd_parms *cmd, void *dconf_, const char *arg1,
+ const char *arg2, const char *arg3)
+{
+ msg_entry *entry = apr_pcalloc(cmd->pool, sizeof(msg_entry));
+ log_debug_dirconf *dconf = dconf_;
+ int i, j;
+ const char *err;
+ const char *args[2];
+ args[0] = arg2;
+ args[1] = arg3;
+
+ entry->msg_expr = ap_expr_parse_cmd(cmd, arg1, AP_EXPR_FLAG_STRING_RESULT|
+ AP_EXPR_FLAG_DONT_VARY,
+ &err, NULL);
+ if (err)
+ return apr_psprintf(cmd->pool,
+ "Could not parse message expression '%s': %s",
+ arg1, err);
+
+ for (i = 0; i < 2; i++) {
+ if (args[i] == NULL)
+ break;
+
+ if (strncasecmp(args[i], "hook=", 5) == 0) {
+ const char *name = args[i] + 5;
+ j = 0;
+ while (hooks[j]) {
+ if (strcasecmp(hooks[j], name) == 0) {
+ entry->hook = hooks[j];
+ break;
+ }
+ j++;
+ }
+ if (entry->hook == NULL) {
+ if (strcmp(name, "*") == 0 || strcasecmp(name, allhooks) == 0)
+ entry->hook = allhooks;
+ else
+ return apr_psprintf(cmd->pool, "Invalid hook name: %s", name);
+ }
+ }
+ else if (strncasecmp(args[i], "expr=", 5) == 0) {
+ const char *expr = args[i] + 5;
+ entry->condition = ap_expr_parse_cmd(cmd, expr,
+ AP_EXPR_FLAG_DONT_VARY,
+ &err, NULL);
+ if (err)
+ return apr_psprintf(cmd->pool,
+ "Could not parse expression '%s': %s",
+ expr, err);
+ }
+ else {
+ return apr_psprintf(cmd->pool, "Invalid argument %s", args[i]);
+ }
+ }
+ if (entry->hook == NULL)
+ entry->hook = hooks[0];
+
+ if (!dconf->entries)
+ dconf->entries = apr_array_make(cmd->pool, 4, sizeof(msg_entry *));
+
+ APR_ARRAY_PUSH(dconf->entries, msg_entry *) = entry;
+
+ return NULL;
+}
+
+static const command_rec log_debug_cmds[] =
+{
+ AP_INIT_TAKE123("LogMessage", cmd_log_message, NULL, RSRC_CONF|ACCESS_CONF,
+ "Log a debug message to the error log if this config block is used for "
+ " a request"),
+ {NULL}
+};
+
+static void register_hooks(apr_pool_t *p)
+{
+ ap_hook_log_transaction(log_debug_log_transaction, NULL, NULL, APR_HOOK_FIRST);
+ ap_hook_quick_handler(log_debug_quick_handler, NULL, NULL, APR_HOOK_FIRST);
+ ap_hook_handler(log_debug_handler, NULL, NULL, APR_HOOK_FIRST);
+ ap_hook_pre_translate_name(log_debug_pre_translate_name, NULL, NULL, APR_HOOK_FIRST);
+ ap_hook_translate_name(log_debug_translate_name, NULL, NULL, APR_HOOK_FIRST);
+ ap_hook_map_to_storage(log_debug_map_to_storage, NULL, NULL, APR_HOOK_FIRST);
+ ap_hook_fixups(log_debug_fixups, NULL, NULL, APR_HOOK_FIRST);
+ ap_hook_type_checker(log_debug_type_checker, NULL, NULL, APR_HOOK_FIRST);
+ ap_hook_check_access(log_debug_check_access, NULL, NULL, APR_HOOK_FIRST, AP_AUTH_INTERNAL_PER_URI);
+ ap_hook_check_access_ex(log_debug_check_access_ex, NULL, NULL, APR_HOOK_FIRST, AP_AUTH_INTERNAL_PER_URI);
+ ap_hook_check_authn(log_debug_check_authn, NULL, NULL, APR_HOOK_FIRST, AP_AUTH_INTERNAL_PER_URI);
+ ap_hook_check_authz(log_debug_check_authz, NULL, NULL, APR_HOOK_FIRST, AP_AUTH_INTERNAL_PER_URI);
+ ap_hook_insert_filter(log_debug_insert_filter, NULL, NULL, APR_HOOK_FIRST);
+}
+
+AP_DECLARE_MODULE(log_debug) =
+{
+ STANDARD20_MODULE_STUFF,
+ log_debug_create_dconf, /* create per-dir config */
+ log_debug_merge_dconf, /* merge per-dir config */
+ NULL, /* server config */
+ NULL, /* merge server config */
+ log_debug_cmds, /* command apr_table_t */
+ register_hooks /* register hooks */
+};
+