diff options
Diffstat (limited to 'includes/bootstrap.inc')
| -rw-r--r-- | includes/bootstrap.inc | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/includes/bootstrap.inc b/includes/bootstrap.inc new file mode 100644 index 000000000..c13f1b8b7 --- /dev/null +++ b/includes/bootstrap.inc @@ -0,0 +1,226 @@ +<?php + +function conf_init() { + + /* + ** Try finding a matching configuration file by stripping the website's + ** URI from left to right. If no configuration file is found, return a + ** default value 'conf'. + */ + + $uri = $_SERVER["PHP_SELF"]; + + $file = strtolower(strtr($_SERVER["HTTP_HOST"] . substr($uri, 0, strrpos($uri, "/")), "/:", "..")); + + while (strlen($file) > 4) { + if (file_exists("includes/$file.php")) { + return $file; + } + else { + $file = substr($file, strpos($file, ".") + 1); + } + } + + return "conf"; +} + +function variable_init($conf = array()) { + $result = db_query("SELECT * FROM {variable} "); + while ($variable = db_fetch_object($result)) { + if (!isset($conf[$variable->name])) { + $conf[$variable->name] = unserialize($variable->value); + } + } + + return $conf; +} + +function variable_get($name, $default) { + global $conf; + + return isset($conf[$name]) ? $conf[$name] : $default; +} + +function variable_set($name, $value) { + global $conf; + + db_query("DELETE FROM {variable} WHERE name = '%s'", $name); + db_query("INSERT INTO {variable} (name, value) VALUES ('%s', '%s')", $name, serialize($value)); + + $conf[$name] = $value; +} + +function variable_del($name) { + global $conf; + + db_query("DELETE FROM {variable} WHERE name = '%s'", $name); + + unset($conf[$name]); +} + +function cache_get($key) { + $cache = db_fetch_object(db_query("SELECT data, created FROM {cache} WHERE cid = '%s'", $key)); + return $cache->data ? $cache : 0; +} + +function cache_set($cid, $data, $expire = 0) { + db_query("UPDATE {cache} SET data = '%s', created = %d, expire = %d WHERE cid = '%s'", $data, time(), $expire, $cid); + if (!db_affected_rows()) { + db_query("INSERT INTO {cache} (cid, data, created, expire) VALUES('%s', '%s', %d, %d)", $cid, $data, time(), $expire); + } +} + +function cache_clear_all($cid = NULL) { + if (empty($cid)) { + db_query("DELETE FROM {cache} WHERE expire <> 0"); + } + else { + db_query("DELETE FROM {cache} WHERE cid = '%s'", $cid); + } +} + +function page_set_cache() { + global $user; + + if (!$user->uid && $_SERVER["REQUEST_METHOD"] == "GET") { + if ($data = ob_get_contents()) { + cache_set(request_uri(), $data, 1); + } + } +} + +function page_get_cache() { + global $user; + + $cache = NULL; + + if (!$user->uid && $_SERVER["REQUEST_METHOD"] == "GET") { + $cache = cache_get(request_uri()); + + if (empty($cache)) { + ob_start(); + } + } + + return $cache; +} + +function drupal_page_header() { + + if (variable_get("dev_timer", 0)) { + timer_start(); + } + + if (variable_get("cache", 0)) { + if ($cache = page_get_cache()) { + + // Set default values: + $date = gmdate("D, d M Y H:i:s", $cache->created) ." GMT"; + $etag = '"'. md5($date) .'"'; + + // Check http headers: + $modified_since = isset($_SERVER["HTTP_IF_MODIFIED_SINCE"]) ? $_SERVER["HTTP_IF_MODIFIED_SINCE"] == $date : NULL; + $none_match = isset($_SERVER["HTTP_IF_NONE_MATCH"]) ? $_SERVER["HTTP_IF_NONE_MATCH"] == $etag : NULL; + + // The type checking here is very important, be careful when changing entries. + if (($modified_since !== NULL || $none_match !== NULL) && $modified_since !== false && $none_match !== false) { + header("HTTP/1.0 304 Not Modified"); + exit(); + } + + // Send appropriate response: + header("Last-Modified: $date"); + header("ETag: $etag"); + print $cache->data; + + /* + ** call all init() and exit() hooks without including all modules + ** only use those hooks for critical operations + */ + foreach (module_list(0, 1) as $module) { + if (is_array($module) && $module['bootstrap']) { + include_once $module['filename']; + foreach (bootstrap_hooks() as $hook) { + module_invoke($module['name'], $hook); + } + } + } + exit(); + } + } +} + +// critical hooks called even when serving a cached page +function bootstrap_hooks() { + return array('init', 'exit'); +} + +function referer_uri() { + + if (isset($_SERVER["HTTP_REFERER"])) { + $uri = $_SERVER["HTTP_REFERER"]; + + return check_url($uri); + } +} + +function arg($index) { + + static $arguments; + + if (empty($arguments)) { + $arguments = explode("/", $_GET["q"]); + } + + return $arguments[$index]; +} + +function check_query($text) { + return addslashes($text); +} + +function check_url($uri) { + $uri = htmlspecialchars($uri, ENT_QUOTES); + + /* + ** We replace ( and ) with their entity equivalents to prevent XSS + ** attacks. + */ + + $uri = strtr($uri, array("(" => "&040;", ")" => "&041;")); + + return $uri; +} + +function request_uri() { + /* + ** Since request_uri() is only available on Apache, we generate + ** equivalent using other environment vars. + */ + + if (isset($_SERVER["REQUEST_URI"])) { + $uri = $_SERVER["REQUEST_URI"]; + } + else { + $uri = $_SERVER["PHP_SELF"] ."?". $_SERVER["QUERY_STRING"]; + } + + return check_url($uri); +} +function timer_start() { + global $timer; + list($usec, $sec) = explode(" ", microtime()); + $timer = (float)$usec + (float)$sec; +} + +unset($conf); +$config = conf_init(); + +include_once "includes/$config.php"; +include_once "includes/database.inc"; +include_once "includes/session.inc"; +include_once "includes/module.inc"; + +// initialize configuration variables, using values from conf.php if available: +$conf = variable_init(isset($conf) ? $conf : array()); +?> |