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