5/17/2023 0 Comments Combine pdf mergeWith any operating system, you can always use an online app that combines and edits uploaded PDFs, but I’m leery about using almost all of them. If you use Windows, you need third-party apps-good thing there are a few free, open-source options that do the job. Best Hosted Endpoint Protection and Security Software. But I think there are those in real need that will benefit more from your generosity. having said that, gifts (such as free coffee or iTunes gift cards) are always fun. What this project needs is the time given by caring developers who keep it up to date and fix any documentation errors or issues they notice. This project can sustain itself without your money. If you're thinking of donations or sending me money - no need. You can look at the GitHub Issues Page and see the "help wanted" tags. Please respect his license and copyright. I wanted to install the gem, but I had issues with the internet and ended up copying the code itself into the combine_pdf_decrypt class file.Ĭredit to his wonderful is given here. Stefan Leitner wrote the outline merging code supporting PDFs which contain a ToC.Ĭaige Nichols wrote an amazing RC4 gem which I used in my code. The code itself should be very straight forward, but feel free to ask whatever you want. The documentation is lacking and the comments in the code are poor guidlines. If you want to help with the code, please be aware: There is very little support for encrypted files and very very basic and limited support for compressed files. Some PDF files are encrypted and some are compressed (the use of filters). You can see a Demo for a "Bates stumping web-app" and read through it's code. load ( pdf_file, allow_optional_content: true ) attachments. That being said, I'm using the library happily after testing against different solutions. If this library causes loss of data or burns down your house, I'm not to blame - as pointed to by the MIT license. The same applies to PDF links and the table of contents, which all have global attributes and could be corrupted or lost when combining PDF data. However, PDF files are quite complex creatures and no guaranty is provided.įor example, PDF Forms are known to have issues and form data might be lost when attempting to combine PDFs with filled form data (also, forms are global objects, not page specific, so one should combine the whole of the PDF for any data to have any chance of being preserved). Hence, PDF files that have heavily nested objects, as well as those that where combined in a way that results in cyclic nesting, might explode the stack - resulting in an exception or program failure.ĬombinePDF is written natively in Ruby and should (presumably) work on all Ruby platforms that follow Ruby 2.0 compatibility. The CombinePDF gem runs recursive code to both parse and format the PDF files. I find it better to err on the side of caution, although for optional content PDFs an exception is avoidable using CombinePDF.load(pdf_file, allow_optional_content: true). Sometimes the CombinePDF will raise an exception even if the PDF could be parsed (i.e., when PDF optional content exists). If you prefer to choose the noisy route, you can specify the raise_on_encrypted option using CombinePDF.load(pdf_file, raise_on_encrypted: true) which will raise a CombinePDF::EncryptionError. Some encrypted PDF files (usually the ones you can't view without a password) will fail quietly instead of noisily. Some links will be lost when ripping pages out of PDF files and merging them with another PDF. Keeping this information requires merging the PDF objects rather then their pages. Some links and data (URL links and PDF "Named Destinations") are stored at the root of a PDF and they aren't linked back to from the page. You can fix this by adding content to the pages before merging the PDF files (i.e. When unifying the same TOC data more then once, one of the references will be unified with the other (meaning that if the pages look the same, both references will link to the same page instead of linking to two different pages). I couldn't fix this because this is how PDF forms work (filling a field fills in the data in any field with the same name), but frankly, I kinda liked the issue. When combining PDF Forms, form data might be unified. I tried fixing this to the best of my ability, but I'm not sure it all works just yet. When reading PDF Forms, some form data might be lost. Please hit me up if you would like to join in and eventually take over. I love this gem, but I feel it's time I took a step back from maintaining it and concentrate on my music and other things I want to develop. However, during the last three years or so I have been maintaining the project for no reason at all, except that I enjoyed sharing it with the community. I wrote this gem because I needed to solve an issue with bates-numbering existing PDF documents. I need help maintaining the CombinePDF Ruby gem.
0 Comments
Leave a Reply. |