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-rw-r--r--modules/lua/lua_dbd.c843
1 files changed, 843 insertions, 0 deletions
diff --git a/modules/lua/lua_dbd.c b/modules/lua/lua_dbd.c
new file mode 100644
index 0000000..1b8d5b7
--- /dev/null
+++ b/modules/lua/lua_dbd.c
@@ -0,0 +1,843 @@
+/**
+ * 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 "mod_lua.h"
+#include "lua_dbd.h"
+
+APLOG_USE_MODULE(lua);
+static APR_OPTIONAL_FN_TYPE(ap_dbd_close) *lua_ap_dbd_close = NULL;
+static APR_OPTIONAL_FN_TYPE(ap_dbd_open) *lua_ap_dbd_open = NULL;
+
+
+
+
+static request_rec *ap_lua_check_request_rec(lua_State *L, int index)
+{
+ request_rec *r;
+ luaL_checkudata(L, index, "Apache2.Request");
+ r = lua_unboxpointer(L, index);
+ return r;
+}
+
+static lua_db_handle *lua_get_db_handle(lua_State *L)
+{
+ luaL_checktype(L, 1, LUA_TTABLE);
+ lua_rawgeti(L, 1, 0);
+ luaL_checktype(L, -1, LUA_TUSERDATA);
+ return (lua_db_handle *) lua_topointer(L, -1);
+}
+
+static lua_db_result_set *lua_get_result_set(lua_State *L)
+{
+ luaL_checktype(L, 1, LUA_TTABLE);
+ lua_rawgeti(L, 1, 0);
+ luaL_checktype(L, -1, LUA_TUSERDATA);
+ return (lua_db_result_set *) lua_topointer(L, -1);
+}
+
+
+/*
+ =============================================================================
+ db:close(): Closes an open database connection.
+ =============================================================================
+ */
+int lua_db_close(lua_State *L)
+{
+ /*~~~~~~~~~~~~~~~~~~~~*/
+ lua_db_handle *db;
+ apr_status_t rc = 0;
+ /*~~~~~~~~~~~~~~~~~~~~*/
+
+ db = lua_get_db_handle(L);
+ if (db && db->alive) {
+ if (db->type == LUA_DBTYPE_APR_DBD) {
+ rc = apr_dbd_close(db->driver, db->handle);
+ if (db->pool) apr_pool_destroy(db->pool);
+ }
+ else {
+ lua_ap_dbd_close = APR_RETRIEVE_OPTIONAL_FN(ap_dbd_close);
+ if (lua_ap_dbd_close != NULL)
+ if (db->dbdhandle) lua_ap_dbd_close(db->server, db->dbdhandle);
+ }
+
+ db->driver = NULL;
+ db->handle = NULL;
+ db->alive = 0;
+ db->pool = NULL;
+ }
+
+ lua_settop(L, 0);
+ lua_pushnumber(L, rc);
+ return 1;
+}
+
+/*
+ =============================================================================
+ db:__gc(): Garbage collecting function.
+ =============================================================================
+ */
+int lua_db_gc(lua_State *L)
+{
+ /*~~~~~~~~~~~~~~~~*/
+ lua_db_handle *db;
+ /*~~~~~~~~~~~~~~~~~~~~*/
+
+ db = lua_touserdata(L, 1);
+ if (db && db->alive) {
+ if (db->type == LUA_DBTYPE_APR_DBD) {
+ apr_dbd_close(db->driver, db->handle);
+ if (db->pool) apr_pool_destroy(db->pool);
+ }
+ else {
+ lua_ap_dbd_close = APR_RETRIEVE_OPTIONAL_FN(ap_dbd_close);
+ if (lua_ap_dbd_close != NULL)
+ if (db->dbdhandle) lua_ap_dbd_close(db->server, db->dbdhandle);
+ }
+ db->driver = NULL;
+ db->handle = NULL;
+ db->alive = 0;
+ db->pool = NULL;
+ }
+ lua_settop(L, 0);
+ return 0;
+}
+
+/*
+ =============================================================================
+ db:active(): Returns true if the connection to the db is still active.
+ =============================================================================
+ */
+int lua_db_active(lua_State *L)
+{
+ /*~~~~~~~~~~~~~~~~~~~~*/
+ lua_db_handle *db = 0;
+ apr_status_t rc = 0;
+ /*~~~~~~~~~~~~~~~~~~~~*/
+
+ db = lua_get_db_handle(L);
+ if (db && db->alive) {
+ rc = apr_dbd_check_conn(db->driver, db->pool, db->handle);
+ if (rc == APR_SUCCESS) {
+ lua_pushboolean(L, 1);
+ return 1;
+ }
+ }
+
+ lua_pushboolean(L, 0);
+ return 1;
+}
+
+/*
+ =============================================================================
+ db:query(statement): Executes the given database query and returns the
+ number of rows affected. If an error is encountered, returns nil as the
+ first parameter and the error message as the second.
+ =============================================================================
+ */
+int lua_db_query(lua_State *L)
+{
+ /*~~~~~~~~~~~~~~~~~~~~~~~*/
+ lua_db_handle *db = 0;
+ apr_status_t rc = 0;
+ int x = 0;
+ const char *statement;
+ /*~~~~~~~~~~~~~~~~~~~~~~~*/
+ luaL_checktype(L, 3, LUA_TSTRING);
+ statement = lua_tostring(L, 3);
+ db = lua_get_db_handle(L);
+ if (db && db->alive)
+ rc = apr_dbd_query(db->driver, db->handle, &x, statement);
+ else {
+ rc = 0;
+ x = -1;
+ }
+
+ if (rc == APR_SUCCESS)
+ lua_pushnumber(L, x);
+ else {
+
+ /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+ const char *err = apr_dbd_error(db->driver, db->handle, rc);
+ /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+
+ lua_pushnil(L);
+ if (err) {
+ lua_pushstring(L, err);
+ return 2;
+ }
+ }
+
+ return 1;
+}
+
+/*
+ =============================================================================
+ db:escape(string): Escapes a string for safe use in the given database type.
+ =============================================================================
+ */
+int lua_db_escape(lua_State *L)
+{
+ /*~~~~~~~~~~~~~~~~~~~~~*/
+ lua_db_handle *db = 0;
+ const char *statement;
+ const char *escaped = 0;
+ request_rec *r;
+ /*~~~~~~~~~~~~~~~~~~~~~*/
+
+ r = ap_lua_check_request_rec(L, 2);
+ if (r) {
+ luaL_checktype(L, 3, LUA_TSTRING);
+ statement = lua_tostring(L, 3);
+ db = lua_get_db_handle(L);
+ if (db && db->alive) {
+ apr_dbd_init(r->pool);
+ escaped = apr_dbd_escape(db->driver, r->pool, statement,
+ db->handle);
+ if (escaped) {
+ lua_pushstring(L, escaped);
+ return 1;
+ }
+ }
+ else {
+ lua_pushnil(L);
+ }
+ return (1);
+ }
+
+ return 0;
+}
+
+/*
+ =============================================================================
+ resultset(N): Fetches one or more rows from a result set.
+ =============================================================================
+ */
+int lua_db_get_row(lua_State *L)
+{
+ int row_no,x,alpha = 0;
+ const char *entry, *rowname;
+ apr_dbd_row_t *row = 0;
+ lua_db_result_set *res = lua_get_result_set(L);
+
+ row_no = luaL_optinteger(L, 2, 0);
+ if (lua_isboolean(L, 3)) {
+ alpha = lua_toboolean(L, 3);
+ }
+ lua_settop(L,0);
+
+ /* Fetch all rows at once? */
+
+ if (row_no == 0) {
+ row_no = 1;
+ lua_newtable(L);
+ while (apr_dbd_get_row(res->driver, res->pool, res->results,
+ &row, -1) != -1)
+ {
+ lua_pushinteger(L, row_no);
+ lua_newtable(L);
+ for (x = 0; x < res->cols; x++) {
+ entry = apr_dbd_get_entry(res->driver, row, x);
+ if (entry) {
+ if (alpha == 1) {
+ rowname = apr_dbd_get_name(res->driver,
+ res->results, x);
+ lua_pushstring(L, rowname ? rowname : "(oob)");
+ }
+ else {
+ lua_pushinteger(L, x + 1);
+ }
+ lua_pushstring(L, entry);
+ lua_rawset(L, -3);
+ }
+ }
+ lua_rawset(L, -3);
+ row_no++;
+ }
+ return 1;
+ }
+
+ /* Just fetch a single row */
+ if (apr_dbd_get_row(res->driver, res->pool, res->results,
+ &row, row_no) != -1)
+ {
+
+ lua_newtable(L);
+ for (x = 0; x < res->cols; x++) {
+ entry = apr_dbd_get_entry(res->driver, row, x);
+ if (entry) {
+ if (alpha == 1) {
+ rowname = apr_dbd_get_name(res->driver,
+ res->results, x);
+ lua_pushstring(L, rowname ? rowname : "(oob)");
+ }
+ else {
+ lua_pushinteger(L, x + 1);
+ }
+ lua_pushstring(L, entry);
+ lua_rawset(L, -3);
+ }
+ }
+ return 1;
+ }
+ return 0;
+}
+
+
+/*
+ =============================================================================
+ db:select(statement): Queries the database for the given statement and
+ returns the rows/columns found as a table. If an error is encountered,
+ returns nil as the first parameter and the error message as the second.
+ =============================================================================
+ */
+int lua_db_select(lua_State *L)
+{
+ /*~~~~~~~~~~~~~~~~~~~~~~~*/
+ lua_db_handle *db = 0;
+ apr_status_t rc = 0;
+ const char *statement;
+ request_rec *r;
+ /*~~~~~~~~~~~~~~~~~~~~~~~*/
+ r = ap_lua_check_request_rec(L, 2);
+ if (r) {
+ luaL_checktype(L, 3, LUA_TSTRING);
+ statement = lua_tostring(L, 3);
+ db = lua_get_db_handle(L);
+ if (db && db->alive) {
+
+ /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+ int cols;
+ apr_dbd_results_t *results = 0;
+ lua_db_result_set* resultset = NULL;
+ /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+
+ rc = apr_dbd_select(db->driver, db->pool, db->handle,
+ &results, statement, 0);
+ if (rc == APR_SUCCESS) {
+
+ cols = apr_dbd_num_cols(db->driver, results);
+
+ if (cols > 0) {
+ lua_newtable(L);
+ resultset = lua_newuserdata(L, sizeof(lua_db_result_set));
+ resultset->cols = cols;
+ resultset->driver = db->driver;
+ resultset->pool = db->pool;
+ resultset->rows = apr_dbd_num_tuples(db->driver, results);
+ resultset->results = results;
+ luaL_newmetatable(L, "lua_apr.dbselect");
+ lua_pushliteral(L, "__call");
+ lua_pushcfunction(L, lua_db_get_row);
+ lua_rawset(L, -3);
+ lua_setmetatable(L, -3);
+ lua_rawseti(L, -2, 0);
+ return 1;
+ }
+ return 0;
+ }
+ else {
+
+ /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+ const char *err = apr_dbd_error(db->driver, db->handle, rc);
+ /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+
+ lua_pushnil(L);
+ if (err) {
+ lua_pushstring(L, err);
+ return 2;
+ }
+ }
+ }
+
+ lua_pushboolean(L, 0);
+ return 1;
+ }
+
+ return 0;
+}
+
+
+
+/*
+ =============================================================================
+ statement:select(var1, var2, var3...): Injects variables into a prepared
+ statement and returns the number of rows matching the query.
+ =============================================================================
+ */
+int lua_db_prepared_select(lua_State *L)
+{
+ /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+ lua_db_prepared_statement *st = 0;
+ apr_status_t rc = 0;
+ const char **vars;
+ int x, have;
+ /*~~~~~~~~~~~~~~~~~~~~~~~*/
+
+ /* Fetch the prepared statement and the vars passed */
+ luaL_checktype(L, 1, LUA_TTABLE);
+ lua_rawgeti(L, 1, 0);
+ luaL_checktype(L, -1, LUA_TUSERDATA);
+ st = (lua_db_prepared_statement*) lua_topointer(L, -1);
+
+ /* Check if we got enough variables passed on to us.
+ * This, of course, only works for prepared statements made through lua. */
+ have = lua_gettop(L) - 2;
+ if (st->variables != -1 && have < st->variables ) {
+ lua_pushboolean(L, 0);
+ lua_pushfstring(L,
+ "Error in executing prepared statement: Expected %d arguments, got %d.",
+ st->variables, have);
+ return 2;
+ }
+ vars = apr_pcalloc(st->db->pool, have*sizeof(char *));
+ for (x = 0; x < have; x++) {
+ vars[x] = lua_tostring(L, x + 2);
+ }
+
+ /* Fire off the query */
+ if (st->db && st->db->alive) {
+
+ /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+ int cols;
+ apr_dbd_results_t *results = 0;
+ /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+
+ rc = apr_dbd_pselect(st->db->driver, st->db->pool, st->db->handle,
+ &results, st->statement, 0, have, vars);
+ if (rc == APR_SUCCESS) {
+
+ /*~~~~~~~~~~~~~~~~~~~~~*/
+ lua_db_result_set *resultset;
+ /*~~~~~~~~~~~~~~~~~~~~~*/
+
+ cols = apr_dbd_num_cols(st->db->driver, results);
+ lua_newtable(L);
+ resultset = lua_newuserdata(L, sizeof(lua_db_result_set));
+ resultset->cols = cols;
+ resultset->driver = st->db->driver;
+ resultset->pool = st->db->pool;
+ resultset->rows = apr_dbd_num_tuples(st->db->driver, results);
+ resultset->results = results;
+ luaL_newmetatable(L, "lua_apr.dbselect");
+ lua_pushliteral(L, "__call");
+ lua_pushcfunction(L, lua_db_get_row);
+ lua_rawset(L, -3);
+ lua_setmetatable(L, -3);
+ lua_rawseti(L, -2, 0);
+ return 1;
+
+ }
+ else {
+
+ /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+ const char *err = apr_dbd_error(st->db->driver, st->db->handle, rc);
+ /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+
+ lua_pushnil(L);
+ if (err) {
+ lua_pushstring(L, err);
+ return 2;
+ }
+ return 1;
+ }
+ }
+
+ lua_pushboolean(L, 0);
+ lua_pushliteral(L,
+ "Database connection seems to be closed, please reacquire it.");
+ return (2);
+}
+
+
+/*
+ =============================================================================
+ statement:query(var1, var2, var3...): Injects variables into a prepared
+ statement and returns the number of rows affected.
+ =============================================================================
+ */
+int lua_db_prepared_query(lua_State *L)
+{
+ /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+ lua_db_prepared_statement *st = 0;
+ apr_status_t rc = 0;
+ const char **vars;
+ int x, have;
+ /*~~~~~~~~~~~~~~~~~~~~~~~*/
+
+ /* Fetch the prepared statement and the vars passed */
+ luaL_checktype(L, 1, LUA_TTABLE);
+ lua_rawgeti(L, 1, 0);
+ luaL_checktype(L, -1, LUA_TUSERDATA);
+ st = (lua_db_prepared_statement*) lua_topointer(L, -1);
+
+ /* Check if we got enough variables passed on to us.
+ * This, of course, only works for prepared statements made through lua. */
+ have = lua_gettop(L) - 2;
+ if (st->variables != -1 && have < st->variables ) {
+ lua_pushboolean(L, 0);
+ lua_pushfstring(L,
+ "Error in executing prepared statement: Expected %d arguments, got %d.",
+ st->variables, have);
+ return 2;
+ }
+ vars = apr_pcalloc(st->db->pool, have*sizeof(char *));
+ for (x = 0; x < have; x++) {
+ vars[x] = lua_tostring(L, x + 2);
+ }
+
+ /* Fire off the query */
+ if (st->db && st->db->alive) {
+
+ /*~~~~~~~~~~~~~~*/
+ int affected = 0;
+ /*~~~~~~~~~~~~~~*/
+
+ rc = apr_dbd_pquery(st->db->driver, st->db->pool, st->db->handle,
+ &affected, st->statement, have, vars);
+ if (rc == APR_SUCCESS) {
+ lua_pushinteger(L, affected);
+ return 1;
+ }
+ else {
+
+ /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+ const char *err = apr_dbd_error(st->db->driver, st->db->handle, rc);
+ /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+
+ lua_pushnil(L);
+ if (err) {
+ lua_pushstring(L, err);
+ return 2;
+ }
+ return 1;
+ }
+ }
+
+ lua_pushboolean(L, 0);
+ lua_pushliteral(L,
+ "Database connection seems to be closed, please reacquire it.");
+ return (2);
+}
+
+/*
+ =============================================================================
+ db:prepare(statement): Prepares a statement for later query/select.
+ Returns a table with a :query and :select function, same as the db funcs.
+ =============================================================================
+ */
+int lua_db_prepare(lua_State* L)
+{
+ /*~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+ lua_db_handle *db = 0;
+ apr_status_t rc = 0;
+ const char *statement, *at;
+ request_rec *r;
+ lua_db_prepared_statement* st;
+ int need = 0;
+ /*~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+
+ r = ap_lua_check_request_rec(L, 2);
+ if (r) {
+ apr_dbd_prepared_t *pstatement = NULL;
+ luaL_checktype(L, 3, LUA_TSTRING);
+ statement = lua_tostring(L, 3);
+
+ /* Count number of variables in statement */
+ at = ap_strchr_c(statement,'%');
+ while (at != NULL) {
+ if (at[1] == '%') {
+ at++;
+ }
+ else {
+ need++;
+ }
+ at = ap_strchr_c(at+1,'%');
+ }
+
+
+ db = lua_get_db_handle(L);
+ rc = apr_dbd_prepare(db->driver, r->pool, db->handle, statement,
+ NULL, &pstatement);
+ if (rc != APR_SUCCESS) {
+ /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+ const char *err = apr_dbd_error(db->driver, db->handle, rc);
+ /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+
+ lua_pushnil(L);
+ if (err) {
+ lua_pushstring(L, err);
+ return 2;
+ }
+ return 1;
+ }
+
+ /* Push the prepared statement table */
+ lua_newtable(L);
+ st = lua_newuserdata(L, sizeof(lua_db_prepared_statement));
+ st->statement = pstatement;
+ st->variables = need;
+ st->db = db;
+
+ lua_pushliteral(L, "select");
+ lua_pushcfunction(L, lua_db_prepared_select);
+ lua_rawset(L, -4);
+ lua_pushliteral(L, "query");
+ lua_pushcfunction(L, lua_db_prepared_query);
+ lua_rawset(L, -4);
+ lua_rawseti(L, -2, 0);
+ return 1;
+ }
+ return 0;
+}
+
+
+
+/*
+ =============================================================================
+ db:prepared(statement): Fetches a prepared statement made through
+ DBDPrepareSQL.
+ =============================================================================
+ */
+int lua_db_prepared(lua_State* L)
+{
+ /*~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+ lua_db_handle *db = 0;
+ const char *tag;
+ request_rec *r;
+ lua_db_prepared_statement* st;
+ /*~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+
+ r = ap_lua_check_request_rec(L, 2);
+ if (r) {
+ apr_dbd_prepared_t *pstatement = NULL;
+ db = lua_get_db_handle(L);
+ luaL_checktype(L, 3, LUA_TSTRING);
+ tag = lua_tostring(L, 3);
+
+ /* Look for the statement */
+ pstatement = apr_hash_get(db->dbdhandle->prepared, tag,
+ APR_HASH_KEY_STRING);
+
+ if (pstatement == NULL) {
+ lua_pushnil(L);
+ lua_pushfstring(L,
+ "Could not find any prepared statement called %s!", tag);
+ return 2;
+ }
+
+
+ /* Push the prepared statement table */
+ lua_newtable(L);
+ st = lua_newuserdata(L, sizeof(lua_db_prepared_statement));
+ st->statement = pstatement;
+ st->variables = -1; /* we don't know :( */
+ st->db = db;
+ lua_pushliteral(L, "select");
+ lua_pushcfunction(L, lua_db_prepared_select);
+ lua_rawset(L, -4);
+ lua_pushliteral(L, "query");
+ lua_pushcfunction(L, lua_db_prepared_query);
+ lua_rawset(L, -4);
+ lua_rawseti(L, -2, 0);
+ return 1;
+ }
+ return 0;
+}
+
+
+
+/* lua_push_db_handle: Creates a database table object with database functions
+ and a userdata at index 0, which will call lua_dbgc when garbage collected.
+ */
+static lua_db_handle* lua_push_db_handle(lua_State *L, request_rec* r, int type,
+ apr_pool_t* pool)
+{
+ lua_db_handle* db;
+ lua_newtable(L);
+ db = lua_newuserdata(L, sizeof(lua_db_handle));
+ db->alive = 1;
+ db->pool = pool;
+ db->type = type;
+ db->dbdhandle = 0;
+ db->server = r->server;
+ luaL_newmetatable(L, "lua_apr.dbacquire");
+ lua_pushliteral(L, "__gc");
+ lua_pushcfunction(L, lua_db_gc);
+ lua_rawset(L, -3);
+ lua_setmetatable(L, -2);
+ lua_rawseti(L, -2, 0);
+
+ lua_pushliteral(L, "escape");
+ lua_pushcfunction(L, lua_db_escape);
+ lua_rawset(L, -3);
+
+ lua_pushliteral(L, "close");
+ lua_pushcfunction(L, lua_db_close);
+ lua_rawset(L, -3);
+
+ lua_pushliteral(L, "select");
+ lua_pushcfunction(L, lua_db_select);
+ lua_rawset(L, -3);
+
+ lua_pushliteral(L, "query");
+ lua_pushcfunction(L, lua_db_query);
+ lua_rawset(L, -3);
+
+ lua_pushliteral(L, "active");
+ lua_pushcfunction(L, lua_db_active);
+ lua_rawset(L, -3);
+
+ lua_pushliteral(L, "prepare");
+ lua_pushcfunction(L, lua_db_prepare);
+ lua_rawset(L, -3);
+
+ lua_pushliteral(L, "prepared");
+ lua_pushcfunction(L, lua_db_prepared);
+ lua_rawset(L, -3);
+ return db;
+}
+
+/*
+ =============================================================================
+ 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.
+ =============================================================================
+ */
+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 (*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;
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 13:08:55 +0000