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/*-
* Copyright 2016 Vsevolod Stakhov
*
* Licensed 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 "classifiers.h"
#include "cfg_file.h"
#include "stat_internal.h"
#include "lua/lua_common.h"
struct rspamd_lua_classifier_ctx {
gchar *name;
gint classify_ref;
gint learn_ref;
};
static GHashTable *lua_classifiers = NULL;
#define msg_err_luacl(...) rspamd_default_log_function (G_LOG_LEVEL_CRITICAL, \
"luacl", task->task_pool->tag.uid, \
G_STRFUNC, \
__VA_ARGS__)
#define msg_warn_luacl(...) rspamd_default_log_function (G_LOG_LEVEL_WARNING, \
"luacl", task->task_pool->tag.uid, \
G_STRFUNC, \
__VA_ARGS__)
#define msg_info_luacl(...) rspamd_default_log_function (G_LOG_LEVEL_INFO, \
"luacl", task->task_pool->tag.uid, \
G_STRFUNC, \
__VA_ARGS__)
#define msg_debug_luacl(...) rspamd_default_log_function (G_LOG_LEVEL_DEBUG, \
"luacl", task->task_pool->tag.uid, \
G_STRFUNC, \
__VA_ARGS__)
gboolean
lua_classifier_init (rspamd_mempool_t *pool,
struct rspamd_classifier *cl)
{
struct rspamd_lua_classifier_ctx *ctx;
lua_State *L = cl->ctx->cfg->lua_state;
gint cb_classify = -1, cb_learn = -1;
if (lua_classifiers == NULL) {
lua_classifiers = g_hash_table_new_full (rspamd_strcase_hash,
rspamd_strcase_equal, g_free, g_free);
}
ctx = g_hash_table_lookup (lua_classifiers, cl->subrs->name);
if (ctx != NULL) {
msg_err_pool ("duplicate lua classifier definition: %s",
cl->subrs->name);
return FALSE;
}
lua_getglobal (L, "rspamd_classifiers");
if (lua_type (L, -1) != LUA_TTABLE) {
msg_err_pool ("cannot register classifier %s: no rspamd_classifier global",
cl->subrs->name);
lua_pop (L, 1);
return FALSE;
}
lua_pushstring (L, cl->subrs->name);
lua_gettable (L, -2);
if (lua_type (L, -1) != LUA_TTABLE) {
msg_err_pool ("cannot register classifier %s: bad lua type: %s",
cl->subrs->name, lua_typename (L, lua_type (L, -1)));
lua_pop (L, 2);
return FALSE;
}
lua_pushstring (L, "classify");
lua_gettable (L, -2);
if (lua_type (L, -1) != LUA_TFUNCTION) {
msg_err_pool ("cannot register classifier %s: bad lua type for classify: %s",
cl->subrs->name, lua_typename (L, lua_type (L, -1)));
lua_pop (L, 3);
return FALSE;
}
cb_classify = luaL_ref (L, LUA_REGISTRYINDEX);
lua_pushstring (L, "learn");
lua_gettable (L, -2);
if (lua_type (L, -1) != LUA_TFUNCTION) {
msg_err_pool ("cannot register classifier %s: bad lua type for learn: %s",
cl->subrs->name, lua_typename (L, lua_type (L, -1)));
lua_pop (L, 3);
return FALSE;
}
cb_learn = luaL_ref (L, LUA_REGISTRYINDEX);
lua_pop (L, 2); /* Table + global */
ctx = g_malloc0 (sizeof (*ctx));
ctx->name = g_strdup (cl->subrs->name);
ctx->classify_ref = cb_classify;
ctx->learn_ref = cb_learn;
cl->cfg->flags |= RSPAMD_FLAG_CLASSIFIER_NO_BACKEND;
g_hash_table_insert (lua_classifiers, ctx->name, ctx);
return TRUE;
}
gboolean
lua_classifier_classify (struct rspamd_classifier *ctx,
GPtrArray *tokens,
struct rspamd_task *task)
{
return TRUE;
}
gboolean
lua_classifier_learn_spam (struct rspamd_classifier *ctx,
GPtrArray *tokens,
struct rspamd_task *task,
gboolean is_spam,
gboolean unlearn,
GError **err)
{
return TRUE;
}
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