/*
=============================================================================
dbacquire(dbType, dbString): Opens a new connection to a database of type
_dbType_ and with the connection parameters _dbString_. If successful,
returns a table with functions for using the database handle. If an error
occurs, returns nil as the first parameter and the error message as the
second. See the APR_DBD for a list of database types and connection strings
supported.
=============================================================================
*/
AP_LUA_DECLARE(int) lua_db_acquire(lua_State *L)
{
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
const char *type;
const char *arguments;
const char *error = 0;
request_rec *r;
lua_db_handle *db = 0;
apr_status_t rc = 0;
ap_dbd_t *dbdhandle = NULL;
apr_pool_t *pool = NULL;
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
r = ap_lua_check_request_rec(L, 1);
if (r) {
type = luaL_optstring(L, 2, "mod_dbd"); /* Defaults to mod_dbd */
if (!strcmp(type, "mod_dbd")) {
lua_settop(L, 0);
lua_ap_dbd_open = APR_RETRIEVE_OPTIONAL_FN(ap_dbd_open);
if (lua_ap_dbd_open)
dbdhandle = (ap_dbd_t *) lua_ap_dbd_open(
r->server->process->pool, r->server);
if (dbdhandle) {
db = lua_push_db_handle(L, r, LUA_DBTYPE_MOD_DBD, dbdhandle->pool);
db->driver = dbdhandle->driver;
db->handle = dbdhandle->handle;
db->dbdhandle = dbdhandle;
return 1;
}
else {
lua_pushnil(L);
if ( lua_ap_dbd_open == NULL )
lua_pushliteral(L,
"mod_dbd doesn't seem to have been loaded.");
else
lua_pushliteral(
L,
"Could not acquire connection from mod_dbd. If your database is running, this may indicate a permission problem.");
return 2;
}
}
else {
rc = apr_pool_create(&pool, NULL);
if (rc != APR_SUCCESS) {
lua_pushnil(L);
lua_pushliteral(L, "Could not allocate memory for database!");
return 2;
}
apr_pool_tag(pool, "lua_dbd_pool");
apr_dbd_init(pool);
dbdhandle = apr_pcalloc(pool, sizeof(ap_dbd_t));
rc = apr_dbd_get_driver(pool, type, &dbdhandle->driver);
if (rc == APR_SUCCESS) {
luaL_checktype(L, 3, LUA_TSTRING);
arguments = lua_tostring(L, 3);
lua_settop(L, 0);
if (strlen(arguments)) {
rc = apr_dbd_open_ex(dbdhandle->driver, pool,
arguments, &dbdhandle->handle, &error);
if (rc == APR_SUCCESS) {
db = lua_push_db_handle(L, r, LUA_DBTYPE_APR_DBD, pool);
db->driver = dbdhandle->driver;
db->handle = dbdhandle->handle;
db->dbdhandle = dbdhandle;
return 1;
}
else {
lua_pushnil(L);
if (error) {
lua_pushstring(L, error);
return 2;
}
return 1;
}
}
lua_pushnil(L);
lua_pushliteral(L,
"No database connection string was specified.");
apr_pool_destroy(pool);
return (2);
}
else {
lua_pushnil(L);
if (APR_STATUS_IS_ENOTIMPL(rc)) {
lua_pushfstring(L,
"driver for %s not available", type);
}
else if (APR_STATUS_IS_EDSOOPEN(rc)) {
lua_pushfstring(L,
"can't find driver for %s", type);
}
else if (APR_STATUS_IS_ESYMNOTFOUND(rc)) {
lua_pushfstring(L,
"driver for %s is invalid or corrupted",
type);
}
else {
lua_pushliteral(L,
"mod_lua not compatible with APR in get_driver");
}
lua_pushinteger(L, rc);
apr_pool_destroy(pool);
return 3;
}
}
lua_pushnil(L);
return 1;
}
return 0;
}
APU_DECLARE(apr_status_t) apr_dbd_open(const apr_dbd_driver_t *driver,
apr_pool_t *pool, const char *params,
apr_dbd_t **handle)
{
return apr_dbd_open_ex(driver,pool,params,handle,NULL);
}
