CombinePDF.encrypted?

[leviwilson]

In using CombinePDF, we have a need to understand whether or not a PDF is encrypted with a password or not.

Given that CombinePDF will silently fail in this event, we don't really have a recourse for testing if it is or is not encrypted. Furthermore, we also have scenarios where we have password protected PDFs and we get a https://github.com/boazsegev/combine_pdf/issues/155 issue (Zlib::DataError).

What We Did

• added a CombinePDF.encrypted?
  • returns true if it's password protected; false if it's not (testing the root_object[:Encrypt] to validate)
  • handles if it's encrypted and there's a ZLib::DataError so it doesn't blow up when asking for encrypted?
• added a .travis.yml and make the :default rake task be :test

[leviwilson]

I'm going to close this for now and try to move this into the PDF class. I'll re-open after we switch things around, thanks @boazsegev

[leviwilson]

@boazsegev please provide feedback on https://github.com/boazsegev/combine_pdf/pull/177 that we just opened. This should avoid the double-parsing of the PDF object and allow for the user to opt into throwing a CombinePDF::EncryptionError in the event that the PDF is encrypted.

[reiz]

@boazsegev CombinePDF.encrypted? would be very useful to provide feedback to the user.