Method _getFileName

src/Formidable.js:551–566

(headerValue)

  }

  _getFileName(headerValue) {
    // matches either a quoted-string or a token (RFC 2616 section 19.5.1)
    const m = headerValue.match(
      /\bfilename=("(.*?)"|([^()<>{}[\]@,;:"?=\s/\t]+))($|;\s)/i,
    );
    if (!m) return null;

    const match = m[2] || m[3] || '';
    let originalFilename = match.substr(match.lastIndexOf('\\') + 1);
    originalFilename = originalFilename.replace(/%22/g, '"');
    originalFilename = originalFilename.replace(/&#([\d]{4});/g, (_, code) =>
      String.fromCharCode(code),
    );

    return originalFilename;
  }

  // able to get composed extension with multiple dots
  // "a.b.c" -> ".b.c"