jvsteiner_send-note/docs/Example server implementation.md

Example server implementation

⚠️ WARNING! This code should not be used as-is to implement a service for the public. It is fine for private use.

This is a simple reference implementation using PHP.

/v1/file/upload

Documentation

$whitelist = ['html', 'css', 'jpg', 'png', 'ttf', 'otf', 'woff', 'woff2'];
$data = json_decode(file_get_contents('php://input'));
$file = explode('.', $data->filename);
// Sanitize the filename
$file[0] = preg_replace("/[^a-z0-9]/", '', $file[0]);
if (count($file) === 2 && in_array($file[1], $whitelist) && ! empty($file[0])) {
	if ($data->encoding === 'base64') {
		// Decode uploaded images
		$data->content = base64_decode($data->content);
	}
	file_put_contents(__DIR__ . "/$file[0].$file[1]", $data->content);
}

/v1/file/check-css

Documentation

$data = json_decode(file_get_contents('php://input'));
$id = preg_replace("/[^a-z0-9]/", '', $data->id);
if ($id) {
  $filename = $id . '.css'
  if (file_exists('/path/to/files/' . $filename)) {
    echo json_encode([
      'success'  => true,
      'filename' => 'https://example.com/files/' . $filename
    ]);
  }
}