function answer_request()
{
$graph = array();
$ms = new MasterServer();
foreach ($ms->servers as $info) {
$serverGraph = array();
$info->populateGraphTemplate($serverGraph);
$graph[$info->ident()] = $serverGraph;
}
$json = json_encode_clean($graph);
header('Pragma: public');
header('Cache-Control: public');
header('Content-Type: application/json');
header('Last-Modified: ' . date(DATE_RFC1123, time()));
header('Expires: ' . date(DATE_RFC1123, strtotime('+5 days')));
print $json;
// Thats all folks!
exit;
}
private function outputPackageGraph(&$pack)
{
$fc =& FrontController::fc();
if (!$pack instanceof BasePackage) {
throw new Exception('Received invalid Package.');
}
$cacheName = $this->composePackageGraphCacheName($pack);
try {
if (!FrontController::contentCache()->has($cacheName)) {
// Generate a graph template for this package.
$template = array();
$pack->populateGraphTemplate($template);
$json = json_encode_clean($template);
// Store the graph in the cache.
FrontController::contentCache()->store($cacheName, $json);
}
$contentInfo = new ContentInfo();
if (FrontController::contentCache()->info($cacheName, $contentInfo)) {
header('Pragma: public');
header('Cache-Control: public');
header('Content-Type: application/json');
header('Last-Modified: ' . date(DATE_RFC1123, $contentInfo->modifiedTime));
header('Expires: ' . date(DATE_RFC1123, strtotime('+5 days')));
FrontController::contentCache()->import($cacheName);
}
} catch (Exception $e) {
// Log the error.
trigger_error(sprintf('Failed reading Package JSON from cache.\\nError:%s', $e->getMessage()), E_USER_WARNING);
}
return TRUE;
}
/**
* Given an associative array generate a textual representation
* using JSON markup.
*
* @note json_encode is practically useless for real world data
* in PHP <= 5.3 hence this hand-rolled imitation.
*
* @param array (Array) Array to be interpreted.
* @param flags (Integer) Reserved for future use.
* @param indent_level (Integer) Level of indent to add to the output.
* @return (Mixed) Textual representation in JSON format, else Boolean @c FALSE
*/
function json_encode_clean(&$array, $flags = 0, $indent_level = 0)
{
if (!is_array($array)) {
return FALSE;
}
$staged = NULL;
foreach ($array as $key => $value) {
$key = '"' . addslashes($key) . '"';
// Format the value:
if (is_array($value)) {
// Descend to the subobject.
$value = json_encode_clean($value, $flags, $indent_level + 1);
} else {
if (is_bool($value)) {
$value = (bool) $value ? 'true' : 'false';
} else {
if (!is_numeric($value) || is_string($value)) {
$value = '"' . addslashes($value) . '"';
}
}
}
// Time to construct the staging array?
if (is_null($staged)) {
$staged = array();
}
$staged[] = "{$key}: {$value}";
}
if (is_null($staged)) {
return '';
}
// Collapse into JSON comma-delimited form.
$indent = ' ';
$glue = ", \n";
$tmp = '';
foreach ($staged as $item) {
$tmp .= $indent . $item . $glue;
}
$result = "{\n" . substr($tmp, 0, -strlen($glue)) . "\n}";
// Determine scope-level indent depth.
$indent_level = (int) $indent_level;
if ($indent_level < 0) {
$indent_level = 0;
}
// Apply a scope-level indent?
if ($indent_level != 0) {
$result = str_repeat($indent, $indent_level) . $result;
}
return $result;
}