<?php
/**
* class Settings
*
* Handles editing and fetching jilo configuration.
*/
class Settings {
/**
* Loads javascript file the Jitsi server.
*
* @param string $jitsiUrl The base URL of the Jitsi server.
* @param string $livejsFile The name of the remote js file to load.
* @param bool $raw Whether to return the full file (true) or only uncommented values (false).
*
* @return string The content of the interface_config.js file or an error message.
*/
public function getPlatformJsFile($jitsiUrl, $livejsFile, $raw = false) {
// constructing the URL
$jsFile = $jitsiUrl . '/' . $livejsFile;
// default content, if we can't get the file contents
$jsFileContent = "The file $livejsFile can't be loaded.";
// Check if URL is valid
if (!filter_var($jsFile, FILTER_VALIDATE_URL)) {
return "Invalid URL: $jsFile";
}
// ssl options
$contextOptions = [
'ssl' => [
'verify_peer' => true,
'verify_peer_name' => true,
],
];
$context = stream_context_create($contextOptions);
// Try to get headers first to check if file exists and wasn't redirected
$headers = @get_headers($jsFile, 1); // 1 to get headers as array
if ($headers === false) {
return "The file $livejsFile can't be loaded (connection error).";
}
// Check for redirects
$statusLine = $headers[0];
if (strpos($statusLine, '301') !== false || strpos($statusLine, '302') !== false) {
return "The file $livejsFile was redirected - this might indicate the file doesn't exist.";
}
// Check if we got 200 OK
if (strpos($statusLine, '200') === false) {
return "The file $livejsFile can't be loaded (HTTP error: $statusLine).";
}
// Check content type
$contentType = isset($headers['Content-Type']) ? $headers['Content-Type'] : '';
if (is_array($contentType)) {
$contentType = end($contentType); // get last content-type in case of redirects
}
if (stripos($contentType, 'javascript') === false && stripos($contentType, 'text/plain') === false) {
return "The file $livejsFile doesn't appear to be a JavaScript file (got $contentType).";
}
// get the file
$fileContent = @file_get_contents($jsFile, false, $context);
if ($fileContent !== false) {
// Quick validation of content
$firstLine = strtolower(trim(substr($fileContent, 0, 100)));
if (strpos($firstLine, '<!doctype html>') !== false ||
strpos($firstLine, '<html') !== false ||
strpos($firstLine, '<?xml') !== false) {
return "The file $livejsFile appears to be HTML/XML content instead of JavaScript.";
}
// when we need only uncommented values
if ($raw === false) {
// remove block comments
$jsFileContent = preg_replace('!/\*.*?\*/!s', '', $fileContent);
// remove single-line comments
$jsFileContent = preg_replace('/\/\/[^\n]*/', '', $jsFileContent);
// remove empty lines
$jsFileContent = preg_replace('/^\s*[\r\n]/m', '', $jsFileContent);
// when we need the full file as it is
} else {
$jsFileContent = $fileContent;
}
}
return $jsFileContent;
}
}
?>