Field Detail

• HEADER

  public static final String HEADER

  The HTTP header the extension adds to router requests to self-report.

  See Also:

  Constant Field Values

Method Detail

• compare

  public static int compare(String a,
                            String b)

  Compares two dotted version strings numerically by segment; missing or non-numeric segments count as 0. "0.1.1" > "0.1.0", "0.1.10" > "0.1.9", "1.0" > "0.9.99".

  Parameters:

  a - first version, may be null

  b - second version, may be null

  Returns:

  negative if a is older, zero if equal, positive if a is newer

• extractVersion

  static String extractVersion(String json)

  Extracts the "version" string from extension manifest JSON without a JSON parser, by locating the version key and reading the quoted value after it.

  Parameters:

  json - the manifest content

  Returns:

  the version, or null if not found

• isUpdateAvailable

  public static boolean isUpdateAvailable(String installed,
                                          String bundled)

  Whether an update to the bundled version is available for the installed one.

  Parameters:

  installed - the version reported by the extension, may be null

  bundled - the version bundled in this war, may be null

  Returns:

  true if installed is older than bundled

• readXpiVersion

  public static String readXpiVersion(InputStream xpi)

  Reads the "version" field from the manifest.json inside a zipped XPI.

  Parameters:

  xpi - the open XPI stream; closed by this method. May be null.

  Returns:

  the version string, or null if it cannot be determined