Adding upstream version 2.4.56.upstream/2.4.56upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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 */
+};
+