Add rspamd_config:register_regexp

1 files changed, 77 insertions, 0 deletions

diff --git a/src/lua/lua_config.c b/src/lua/lua_config.c
index ae7111f4a..b7d095ded 100644
--- a/src/lua/lua_config.c
+++ b/src/lua/lua_config.c
@@ -350,6 +350,21 @@ rspamd_config.SYMBOL = {
  */
 LUA_FUNCTION_DEF (config, newindex);
 
+/***
+ * @method rspamd_config:register_regexp(params)
+ * Registers new re for further cached usage
+ * Params is the table with the follwoing fields (mandatory fields are marked with `*`):
+ * - `re`* : regular expression object
+ * - `type`*: type of regular expression:
+ *   + `mime`: mime regexp
+ *   + `header`: header regexp
+ *   + `rawheader`: raw header expression
+ *   + `body`: raw body regexp
+ *   + `url`: url regexp
+ * - `header`: for header and rawheader regexp means the name of header
+ */
+LUA_FUNCTION_DEF (config, register_regexp);
+
 static const struct luaL_reg configlib_m[] = {
 	LUA_INTERFACE_DEF (config, get_module_opt),
 	LUA_INTERFACE_DEF (config, get_mempool),
@@ -374,6 +389,7 @@ static const struct luaL_reg configlib_m[] = {
 	LUA_INTERFACE_DEF (config, get_api_version),
 	LUA_INTERFACE_DEF (config, get_key),
 	LUA_INTERFACE_DEF (config, add_condition),
+	LUA_INTERFACE_DEF (config, register_regexp),
 	{"__tostring", rspamd_lua_class_tostring},
 	{"__newindex", lua_config_newindex},
 	{NULL, NULL}
@@ -1531,6 +1547,67 @@ lua_config_add_condition (lua_State *L)
 	return 1;
 }
 
+static gint
+lua_config_register_regexp (lua_State *L)
+{
+	struct rspamd_config *cfg = lua_check_config (L, 1);
+	struct rspamd_lua_regexp *re = NULL;
+	const gchar *type_str = NULL, *header_str = NULL;
+	gsize header_len = 0;
+	GError *err = NULL;
+	enum rspamd_re_type type = RSPAMD_RE_BODY;
+
+	/*
+	 * - `re`* : regular expression object
+ 	 * - `type`*: type of regular expression:
+	 *   + `mime`: mime regexp
+	 *   + `header`: header regexp
+	 *   + `rawheader`: raw header expression
+	 *   + `body`: raw body regexp
+	 *   + `url`: url regexp
+	 * - `header`: for header and rawheader regexp means the name of header
+	 */
+	if (cfg != NULL) {
+		if (!rspamd_lua_parse_table_arguments (L, 2, &err,
+				"re=*U{regexp};type=*S;header=V",
+				&re, &type_str, &header_len, &header_str)) {
+			msg_err_config ("cannot get parameters list: %e", err);
+
+			if (err) {
+				g_error_free (err);
+			}
+		}
+
+		if (strcmp (type_str, "header") == 0) {
+			type = RSPAMD_RE_HEADER;
+		}
+		else if (strcmp (type_str, "rawheader") == 0) {
+			type = RSPAMD_RE_RAWHEADER;
+		}
+		else if (strcmp (type_str, "mime") == 0) {
+			type = RSPAMD_RE_MIME;
+		}
+		else if (strcmp (type_str, "body") == 0) {
+			type = RSPAMD_RE_BODY;
+		}
+		else if (strcmp (type_str, "url") == 0) {
+			type = RSPAMD_RE_URL;
+		}
+
+		if ((type == RSPAMD_RE_HEADER || type == RSPAMD_RE_RAWHEADER)
+				&& header_str == NULL) {
+			msg_err_config (
+					"header argument is mandatory for header/rawheader regexps");
+		}
+		else {
+			rspamd_re_cache_add (cfg->re_cache, re->re, type,
+					(gpointer) header_str, header_len);
+		}
+	}
+
+	return 0;
+}
+
 struct lua_map_callback_data {
 	lua_State *L;
 	gint ref;