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Re: Goodbye to Document Viewer

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Paul wrote:
> On Tue, 1/7/2025 2:19 PM, Monsieur wrote:
>> This is the third time that my computer freezes when opening an epub with Document Viewer. At first I thought the file was corrupted, but it also happens with other epub-files. The file opens, but I get a completely black page and can no longer do anything. Background processes continue to work (music keeps playing), the mouse can still be moved, but clicking anywhere or pressing keys on the keyboard has no effect whatsoever. Only option is to restart the pc with alt-sysreq-o.
>>
>> Wanted to remove Document Viewer, but was not allowed to do so because of dependency hell.
>>
>> Used Synaptic to remove everything xreader* and so now I think the stupid thing is finally gone. Pdf's now open in a browser. Anyone has had the same problem before? What is a good alternative to Document Viewer (which will never set foot on my hard disk again).
>>
>> Thanks,
>> 🧔
> 
> https://www.w3.org/publishing/epubcheck/
> 
>     "epubcheck moby-dick.epub
> 
>      Validating using EPUB version 3.3 rules.
>      No errors or warnings detected!
>     "
> 
> I would start by verifying the input materials are good.
> 
> Say, for example, you download an ePub from a suspect site
> and the materials inside are an exploit for your computer.
> Perhaps even an epubcheck is not sufficient to vet it.
> 
> Provide a sha256sum of the item. I don't need the file name.
> Just the sha256sum of the thing that hung the viewer.
> 
>     sha256sum  moby-dick.epub
> 
>     123456789ABCD...
> 
> All that I am going to do, is run the sha256sum through
> virustotal.com and see if the document has ever been
> scanned before, and whether anything was abnormal about
> the document from that perspective.


b328acdc487be040db2cd8a645a7d6f48c167e205936473b8864922de6d91852

This came from a free and open source book site (Gutenberg Project I 
believe, not sure). It doesn't hang the computer, but the file opens 
with a black page and navigating is impossible. Probably would hang the 
computer if I left it open for a minute or so.

7a30b5f70aedd80fee54b93e065df1cbf3a289a001a93b1f897feb3736d42e06

Don't remember where I got it, the file is from 2011. It opens with a 
black page too and hangs the computer immediately.

Tried both numbers on virustotal already and got "no matches found".

Also downloaded the epubcheck from w3, but can't get the jar file to run 
(yes, I gave it permission to run). Probably don't have the right Java 
runtime.

Will look further into it tomorrow. Thanks for the tips.

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Goodbye to Document Viewer Monsieur <Monsieur@notreal.invalid> - 2025-01-07 20:19 +0100
  Re: Goodbye to Document Viewer Marco Moock <mm+usenet-es@dorfdsl.de> - 2025-01-07 21:09 +0100
    Re: Goodbye to Document Viewer Monsieur <Monsieur@notreal.invalid> - 2025-01-07 21:35 +0100
  Re: Goodbye to Document Viewer Paul <nospam@needed.invalid> - 2025-01-07 15:30 -0500
    Re: Goodbye to Document Viewer Monsieur <Monsieur@notreal.invalid> - 2025-01-07 21:52 +0100
  Re: Goodbye to Document Viewer Jeff Layman <Jeff@invalid.invalid> - 2025-01-07 21:21 +0000
    Re: Goodbye to Document Viewer Paul <nospam@needed.invalid> - 2025-01-07 20:15 -0500
  Re: Goodbye to Document Viewer Jim <jcm_spectrum@spectrum.net> - 2025-01-07 15:24 -0600
  Re: Goodbye to Document Viewer "Alan K." <alan@invalid.com> - 2025-01-07 17:01 -0500
  Re: Goodbye to Document Viewer Edmund <nomail@hotmail.com> - 2025-01-08 09:41 +0100

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