steveryan
Hey All,
Building a Phoenix LiveView app that allows you to upload a file (currently only markdown supported) and advance through the pages one at a time, and I would like it to support pdf files. I have been looking for a package that can do this, but I can’t find one.
I’d love to be able to provide a pdf, and a page number and render that page of the pdf in my LiveView page.
Is there anything out there like this for Elixir/Phoenix?
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egze
You will need hooks and pdf.js, or no hooks but an iframe.
zimt28
You probably won’t find an existing solution but it should be easy to build one yourself:
bratsche
In the past I’ve used the command line tool
pdfimagesthat’s included in poppler and had some success with it. For example, you can shell out topdfimages -list <filename>to get a list of pages with some information about them, and you can convert the PDF into a series of images that you can render in LiveView.mayel
pdftocairo also works nicely (it renders fonts pretty well, being based on the poppler pdf rendering lib, and can also convert to SVG). For example you generate a preview image of the first page with
pdftocairo -png -singlefile -scale-to #{max_size} #{original_path} #{output_path}mayel
I’ve just experimented with the SVG support. There’s an issue with multipage PDFs in that it generates multi-page SVGs which unfortunately doesn’t seem supported by browsers. You can do one page at a time though with
pdfseparate input.pdf ouput-%d.pdf(that command also comes with poppler) and thenpdftocairo -svgon each page.