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<p>Hi,</p>
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<p>I'd like to go a little microservices on this. I was thinking that we need a REST service that takes a document and returns its archive format equivalent. This can even autodetect the mimetype using e.g JHOVE [1]. There are other tools as well.</p>
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I'd like to support ODF natively via LibreOffice, where the service has LibreOffice running and converts all documents to PDF/A.</div>
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PDF to PDF/A could be done as Petter suggests.</div>
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I would have a microservices style approach and offload it to another REST service as sometimes users will upload big files. The largest PDF file I saw in a Noark system is about 250 MB and when I converted 800 000 documents to archive format a few years ago,
we saw many random crashes. So I really think it's worthwhile offloading it away from the core.</div>
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The documents should be automatically converted to archive format when the case file is closed. </div>
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For teaching purposes, I will not support MS Office. So many of my students are unaware of LibreOffice so I think it's worthwhile exposing them only to LibreOffice via nikita. However if we were to support MS Office, we would need a queue system that can talk
to a PixEdit server to do the conversion. PixEdit works really nicely and is able to work on a per-core basis so scales nicely.</div>
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Creating a REST service to convert the documents would be a nice project for someone to attempt.</div>
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[1]<a href="https://en.wikipedia.org/wiki/JHOVE" class="OWAAutoLink" id="LPlnk192140" previewremoved="true">https://en.wikipedia.org/wiki/JHOVE</a><br>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> nikita-noark-bounces@nuug.no <nikita-noark-bounces@nuug.no> on behalf of Petter Reinholdtsen <pere@hungry.com><br>
<b>Sent:</b> Thursday, May 18, 2017 19:11<br>
<b>To:</b> nikita-noark@nuug.no<br>
<b>Subject:</b> Recipes for converting PDF to PDF/A</font>
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One task we need to implement in the core, is converting PDF files to<br>
PDF/A if they are not already in PDF/A form. I had a quick look, and<br>
found this recipe on<br>
<URL: <a href="https://unix.stackexchange.com/questions/79516/converting-pdf-to-pdf-a" id="LPlnk252717" previewremoved="true">
https://unix.stackexchange.com/questions/79516/converting-pdf-to-pdf-a</a> >:<br>
<br>
gs -sDEVICE=pdfwrite -q -dNOPAUSE -dBATCH -dNOSAFER \<br>
-dPDFA -dUseCIEColor -sProcessColorModel=DeviceCMYK \<br>
-sOutputFile=Out_PDFA.pdf PDFA_def.ps pdfmarks IN_PDF.pdf<br>
<br>
and<br>
<br>
java FixPrintFlag Out_PDFA.pdf New_verifiablePDFA.pdf<br>
<br>
Based on are recipe available from<br>
<URL: <a href="http://thisthatisnot.blogspot.no/2010/04/free-way-to-convert-existing-pdf-to.html" id="LPlnk414903" previewremoved="true">
http://thisthatisnot.blogspot.no/2010/04/free-way-to-convert-existing-pdf-to.html</a> >.<br>
<br>
I wonder, should this be a task done by a API client, or a task done<br>
internally in the server? What do the rest of you think? I suspect<br>
doing it via the API will either loose some metadata or must be done<br>
using operations that allow us to set metadata that normally should not<br>
be modifyable via the API.<br>
<br>
-- <br>
Happy hacking<br>
Petter Reinholdtsen<br>
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