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lighttpd2/src/config_lua.c

210 lines
5.2 KiB

#include <lighttpd/config_lua.h>
#include <lighttpd/condition_lua.h>
#include <lighttpd/value_lua.h>
#include <lighttpd/actions_lua.h>
#include <lualib.h>
#include <lauxlib.h>
typedef int (*LuaWrapper)(server *srv, lua_State *L, gpointer data);
static value* lua_params_to_value(server *srv, lua_State *L) {
value *val, *subval;
switch (lua_gettop(L)) {
case 0:
case 1:
return NULL;
case 2:
return value_from_lua(srv, L);
default:
val = value_new_list();
g_array_set_size(val->data.list, lua_gettop(L) - 1);
while (lua_gettop(L) > 1) {
if (NULL == (subval = value_from_lua(srv, L))) {
ERROR(srv, "Couldn't convert value from lua (lua type '%s')", lua_typename(L, lua_type(L, -1)));
value_free(val);
return NULL;
}
g_array_index(val->data.list, value*, lua_gettop(L) - 1) = subval;
}
return val;
}
return NULL;
}
/* Creates a table on the lua stack */
static void lua_push_publish_hash_metatable(server *srv, lua_State *L);
static int lua_str_hash_index(lua_State *L) {
server *srv;
GHashTable *ht;
LuaWrapper wrapper;
srv = (server*) lua_touserdata(L, lua_upvalueindex(1));
lua_pushstring(L, "__ht"); lua_rawget(L, 1);
ht = (GHashTable*) lua_touserdata(L, -1); lua_pop(L, 1);
lua_pushstring(L, "__wrapper"); lua_rawget(L, 1);
wrapper = (LuaWrapper)(intptr_t) lua_touserdata(L, -1); lua_pop(L, 1);
if (!lua_isstring(L, 2) || !ht || !wrapper) {
lua_pop(L, lua_gettop(L));
lua_pushstring(L, "lookup failed");
lua_error(L);
return 0;
}
/* TRACE(srv, "str hash index: '%s'", luaL_checklstring(L, 2, NULL)); */
lua_newtable(L);
lua_pushlightuserdata(L, ht);
lua_setfield(L, -2, "__ht");
lua_pushlightuserdata(L, (void*)(intptr_t)wrapper);
lua_setfield(L, -2, "__wrapper");
lua_pushstring(L, "__key"); lua_rawget(L, 1);
if (lua_isstring(L, -1)) {
lua_pushstring(L, ".");
lua_pushvalue(L, 2);
lua_concat(L, 3);
} else {
lua_pop(L, 1);
lua_pushvalue(L, 2);
}
lua_setfield(L, -2, "__key");
lua_push_publish_hash_metatable(srv, L);
lua_setmetatable(L, -2);
return 1;
}
static int lua_str_hash_call(lua_State *L) {
server *srv;
GHashTable *ht;
LuaWrapper wrapper;
const char *key;
gpointer d;
srv = (server*) lua_touserdata(L, lua_upvalueindex(1));
lua_pushstring(L, "__ht"); lua_rawget(L, 1);
ht = (GHashTable*) lua_touserdata(L, -1); lua_pop(L, 1);
lua_pushstring(L, "__wrapper"); lua_rawget(L, 1);
wrapper = (LuaWrapper)(intptr_t) lua_touserdata(L, -1); lua_pop(L, 1);
lua_pushstring(L, "__key"); lua_rawget(L, 1);
key = luaL_checklstring(L, -1, NULL);
/* TRACE(srv, "str hash call: '%s'", key); */
if (key && NULL != (d = g_hash_table_lookup(ht, key))) {
lua_pop(L, 1);
return wrapper(srv, L, d);
}
lua_pop(L, lua_gettop(L));
lua_pushstring(L, "lookup failed");
lua_error(L);
return 0;
}
#define LUA_PUBLISH_HASH "GHashTable*"
static void lua_push_publish_hash_metatable(server *srv, lua_State *L) {
if (luaL_newmetatable(L, LUA_PUBLISH_HASH)) {
lua_pushlightuserdata(L, srv);
lua_pushcclosure(L, lua_str_hash_index, 1);
lua_setfield(L, -2, "__index");
lua_pushlightuserdata(L, srv);
lua_pushcclosure(L, lua_str_hash_call, 1);
lua_setfield(L, -2, "__call");
}
}
static gboolean publish_str_hash(server *srv, lua_State *L, GHashTable *ht, LuaWrapper wrapper) {
lua_newtable(L); /* { } */
lua_pushlightuserdata(L, ht);
lua_setfield(L, -2, "__ht");
lua_pushlightuserdata(L, (void*)(intptr_t)wrapper);
lua_setfield(L, -2, "__wrapper");
lua_push_publish_hash_metatable(srv, L);
lua_setmetatable(L, -2);
return TRUE;
}
static int handle_server_action(server *srv, lua_State *L, gpointer _sa) {
server_action *sa = (server_action*) _sa;
value *val;
action *a;
lua_checkstack(L, 16);
val = lua_params_to_value(srv, L);
/* TRACE(srv, "%s", "Creating action"); */
a = sa->create_action(srv, sa->p, val);
value_free(val);
if (NULL == a) {
lua_pushstring(L, "creating action failed");
lua_error(L);
}
return lua_push_action(srv, L, a);
}
static int handle_server_setup(server *srv, lua_State *L, gpointer _ss) {
server_setup *ss = (server_setup*) _ss;
value *val;
lua_checkstack(L, 16);
val = lua_params_to_value(srv, L);
/* TRACE(srv, "%s", "Calling setup"); */
if (!ss->setup(srv, ss->p, val)) {
value_free(val);
lua_pushstring(L, "setup failed");
lua_error(L);
}
value_free(val);
return 0;
}
gboolean config_lua_load(server *srv, const gchar *filename) {
lua_State *L;
L = luaL_newstate();
luaL_openlibs(L);
if (0 != luaL_loadfile(L, filename)) {
ERROR(srv, "Loading script '%s' failed: %s", filename, lua_tostring(L, -1));
return FALSE;
}
TRACE(srv, "Loaded config script '%s'", filename);
publish_str_hash(srv, L, srv->setups, handle_server_setup);
lua_setfield(L, LUA_GLOBALSINDEX, "setup");
publish_str_hash(srv, L, srv->actions, handle_server_action);
lua_setfield(L, LUA_GLOBALSINDEX, "action");
lua_push_lvalues_dict(srv, L);
if (lua_pcall(L, 0, 1, 0)) {
ERROR(srv, "lua_pcall(): %s", lua_tostring(L, -1));
return FALSE;
}
lua_pop(L, 1); /* pop the ret-value */
lua_getfield(L, LUA_GLOBALSINDEX, "actions");
srv->mainaction = lua_get_action(L, -1);
action_acquire(srv->mainaction);
lua_pop(L, 1);
assert(lua_gettop(L) == 0);
lua_close(L);
return TRUE;
}