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77 lines
1.9 KiB
77 lines
1.9 KiB
<?php |
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if (!isset($_GET['f']) || |
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!isset($_GET['t'])) { |
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header('HTTP/1.1 400 Bad Request'); |
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die(); |
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} |
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require(__DIR__ . '/../constants.php'); |
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/** |
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* Check if a file can be served by ext.php. A valid file is under a |
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* EXTENSIONS_PATH/extension_name/static/ directory. |
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* |
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* You should sanitize path by using the realpath() function. |
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* |
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* @param $path the path to the file we want to serve. |
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* @return true if it can be served, false else. |
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* |
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*/ |
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function is_valid_path($path) { |
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// It must be under the extension path. |
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$real_ext_path = realpath(EXTENSIONS_PATH); |
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//Windows compatibility |
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$real_ext_path = str_replace('\\', '/', $real_ext_path); |
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$path = str_replace('\\', '/', $path); |
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$in_ext_path = (substr($path, 0, strlen($real_ext_path)) === $real_ext_path); |
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if (!$in_ext_path) { |
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return false; |
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} |
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// File to serve must be under a `ext_dir/static/` directory. |
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$path_relative_to_ext = substr($path, strlen($real_ext_path) + 1); |
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$path_splitted = explode('/', $path_relative_to_ext); |
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if (count($path_splitted) < 3 || $path_splitted[1] !== 'static') { |
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return false; |
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} |
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return true; |
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} |
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$file_name = urldecode($_GET['f']); |
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$file_type = $_GET['t']; |
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$absolute_filename = realpath(EXTENSIONS_PATH . '/' . $file_name); |
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if (!is_valid_path($absolute_filename)) { |
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header('HTTP/1.1 400 Bad Request'); |
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die(); |
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} |
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switch ($file_type) { |
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case 'css': |
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header('Content-Type: text/css; charset=UTF-8'); |
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header('Content-Disposition: inline; filename="' . $file_name . '"'); |
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break; |
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case 'js': |
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header('Content-Type: application/javascript; charset=UTF-8'); |
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header('Content-Disposition: inline; filename="' . $file_name . '"'); |
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break; |
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default: |
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header('HTTP/1.1 400 Bad Request'); |
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die(); |
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} |
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$mtime = @filemtime($absolute_filename); |
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if ($mtime === false) { |
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header('HTTP/1.1 404 Not Found'); |
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die(); |
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} |
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require(LIB_PATH . '/http-conditional.php'); |
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if (!httpConditional($mtime, 604800, 2)) { |
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readfile($absolute_filename); |
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}
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