Hi Peter, thank you for your answer! The Google and @mire solutions are pretty much out of the question. Google because of copyright problems and @mire because it doesn't comply with the client's specifications (flash is a no no).
I agree with you, making a new bundle to store the previews is tricky and very likely unnecessary I was just following (or trying to follow) the media filter's patterns. In any case. I am developing over (the client was already using when they hired me) a fairly modified version of the jspui and the BitstreamReader is from the xmlui. What is it's jspui equivalent? BitstreamServlet maybe? I was thinking. Maybe the best idea is to modify the HandleServlet and add there the code to make the dissemination (if the bitstream is not already in the specified format) and then have the item viewer request for the images. Do you think it's a good idea? Thanks for your help! On Mon, 2013-06-10 at 10:45 -0400, Peter Dietz wrote: > Hi David, > > > Ultimately you want document preview for PDF. > > > You can take a look at one approach, using Google Docs Previewer. It > embeds an iframe on your page that makes Google Docs produce > images/pages from the URL of your PDF. > https://wiki.duraspace.org/display/DSPACE/Document+Preview+with+Google > +Docs+viewer > > > > > > You can take a look at a module from @mire that does exactly this: > (module) http://atmire.com/website/?q=modules/ds > (demo) > http://atmire.com/dspace-labs3/pdfpreview/bitstream/handle/123456789/7624/Document%20Streaming.doc?sequence=1 > > > > > > Another interesting concept that I've heard of is Brasiliana's Corisco > DSpace. They have an interceptor/disseminator for PDFs that do some > rendering. > https://github.com/brasiliana/Corisco/blob/master/docs/CoriscoDiagram.png > > > > > > Here's a link to a previous dspace-tech discussion on > this: > http://dspace.2283337.n4.nabble.com/Dspace-tech-anyone-coding-document-streaming-for-DSpace-on-their-own-td3277721.html > > > > > If I had to approach this project from scratch, I don't think I would > store the dissemination renditions of the PDF (the JPEGS) into your > repository. Messing with a new bundle for previews is tricky. I would > customize the BitstreamReader to add a dissemination so that the PDF > could be converted to PNG. Then have the ItemViewer request all the > PNG-dissemination for the PDF, instead of the PDF itself. Then you > could plop in a PNG-viewer/gallery/page-turner. The generated PNG's > wouldn't be stored in your DSpace assetstore, but in a temp directory, > or just generated on the fly. > > > > Peter Dietz > > > > On Mon, Jun 10, 2013 at 10:04 AM, David <[email protected]> > wrote: > Hello there list! My name is David and I'm from Argentina. > > I am quite new with Dspace (and java) development and I am > failing to > find a solution for my problem. > > My client (a library) wants to show pdf files embedded > directly in the > page of the item detail "display-item.jsp". I tried several > aproaches > but non where 100% efective. > > I tried: > a. Embbeding the pdf in the page using PDF.js but the > script doesn't > work perfectly in IE and Chrome, some (few) files fail to > load. > b. Embedding the pdf with a reader made with flash. > Converting the > pdf to swf with a custom filter made with pdf2swf. But my > client is not > convinced by flash. He wants something that works with firefox > in unix > as well and flash is certainly dying as a linux/unix friendly > technology. > > So now I had the idea of converting the pdf file to a > collection of pngs > (using pdftoppm) and show the pngs in a custom javascript > "gallery". But > I am not sure if and how can I convert one Bitstream (the pdf > file) to a > collection of Bitstreams (the images) and save them to a > bundle. I > looked at the documentation but it kind of assumes that one > wants a 1:1 > conversion. And Google returned nothing. > > If someone could help me or give me a trail to follow I would > be very > thankful and of course whatever I end up making I will publish > it in my > git account for the public > > I am developing in dspace 1.8.2 (client is already using this > version > and, by now, refuses to upgrade) > > Thanks in advance!. > > > > > ------------------------------------------------------------------------------ > How ServiceNow helps IT people transform IT departments: > 1. A cloud service to automate IT design, transition and > operations > 2. Dashboards that offer high-level views of enterprise > services > 3. A single system of record for all IT processes > http://p.sf.net/sfu/servicenow-d2d-j > _______________________________________________ > DSpace-tech mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/dspace-tech > List Etiquette: > https://wiki.duraspace.org/display/DSPACE/Mailing+List > +Etiquette > >
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