topic Re: Watermark PDF on view/download in Alfresco Archive

Watermark PDF on view/download

cristianfrog — Fri, 03 Jan 2014 13:49:50 GMT

Hi all, happy new year!It's me again, I have to ask you to guide me through this because I can't get over it :<I want to do this: watermark PDF files when user view or download the file from Share. The watermark will be a simple text or image.I tried with a custom behaviour but someone here told

Re: Watermark PDF on view/download

scouil — Fri, 03 Jan 2014 14:33:25 GMT

Hi,

Basically what you need are 2 things:
1) A place to store your watermarked document (this one is optional but will prevent you from have to regenerate it on the fly every single time)
It can be either a rendition node (like the thumbnails you mentionned) or another cm:content field for your document.
2) An interceptor
That will kick in to replace the java function that return the content.
It will be pretty similar except that it will either pick the content from your other node (or field) or generate this content and store it in the right place

Good luck

Re: Watermark PDF on view/download

cristianfrog — Sun, 05 Jan 2014 20:26:44 GMT

So basically I need to look up Alfresco's source code at the function where content is returned out?
Can you provide me some information about the function and where to find it out???
I need to write an AMP with my customization, right?

I will initially think of doing it with static node, it's easier for you it's ok, I need to learn first…
thank you in advance.

Re: Watermark PDF on view/download

scouil — Tue, 07 Jan 2014 09:55:19 GMT

Hi,

Yes it would be either an AMP or a jar since it is some java code.
For the class to extend, look at org.alfresco.service.cmr.repository.ContentService . More specifically the getReader function.

Re: Watermark PDF on view/download

jpotts — Tue, 07 Jan 2014 21:54:13 GMT

Have you taken a look at the <a href="http://addons.alfresco.com/addons/alfresco-pdf-toolkit">PDF Toolkit</a>? It's a freely-available open source project that adds watermarking and other PDF manipulating functionality to Alfresco.

Jeff

Re: Watermark PDF on view/download

cristianfrog — Thu, 23 Jan 2014 11:20:00 GMT

Yes, I did but the addon is based on alfresco's rules and behaviours, so I can watermark documents only when I upload or move them. I will like to do it on the fly when user reads the document so I apply it with his account info like username, timestamp, email, and so on…

Thanks Scouil for the tip, I will look at that function, thank you…

Re: Watermark PDF on view/download

leonard — Thu, 17 Apr 2014 10:36:55 GMT

Hi critianfrog

anyway does the pdf toolkit able to perform watermarking using username for user who read it?

Re: Watermark PDF on view/download

romschn — Thu, 17 Apr 2014 12:21:39 GMT

I have not explored PDT Toolkit, however another option that you can go for is - iText. With the use of it, you can have watermark applied on PDF. You need to have a custom code to get it done the way you require.

Re: Watermark PDF on view/download

christopheradam — Mon, 21 Apr 2014 02:51:02 GMT

We usually add and create a watermark to PDF file in order to help users ensure the document confidentiality and safety. As long as we choose a right <a href="http://www.rasteredge.com/how-to/vb-net-imaging/pdf-watermark-creating/">pdf watermark creating</a> plugin, we can be capable of adding a designed watermark and customizing it on many aspects, for example, typing any text word and phrase, full font options to customize the text font style, size and color, defining the watermark angle and orientation and even saving the created watermark on different ways.

Re: Watermark PDF on view/download

ttownsend — Wed, 17 Dec 2014 22:25:21 GMT

Has anyone come up with an easily deployable solution for this? I would like to deploy a solution for watermarking on download/access.