Invalid Attachments (PDF)

[albsch]

Recently attachments stopped working properly. Neither preview, nor downloading a PDF works. I can confirm that using another IMAP client the same attachment opens and downloads properly.

Here is a diff for a PDF which was once downloaded with Snappymail (error.pdf) and once with another mail client (valid.pdf). It seems that for the corrupt PDF something is missing at the end of the file.

❯ ls
error.pdf  valid.pdf
❯ xxd error.pdf > d1
❯ xxd valid.pdf > d2
❯ diff d1 d2
29184c29184,29187
< 00071ff0: 3868 0494 bdc6 dc3e 89fc                 8h.....>..
---
> 00071ff0: 3868 0494 bdc6 dc3e 89fc 0115 832c 5d0a  8h.....>.....,].
> 00072000: 656e 6473 7472 6561 6d0a 656e 646f 626a  endstream.endobj
> 00072010: 0a73 7461 7274 7872 6566 0a34 3636 3631  .startxref.46661
> 00072020: 340a 2525 454f 460a                      4.%%EOF.

Affects at least versions 2.15.x and 2.17.x.

[ner00]

This has to be very specific, it's working fine for me.

[the-djmaze]

To know why your IMAP server is not transferring the whole file, we need some debug info.
https://github.com/the-djmaze/snappymail/wiki/FAQ#how-do-i-enable-logging

Also clear the /_data_/_default_/cache folder.

[kurti500]

I seem to have a similar issue recently: preview not working for some pdfs, downloading the pdf attachment results in a 0kb file.
But working with another web client for the same file.

[the-djmaze]

I found the above MailSo bug at AfterLogic, maybe it solves it.

[albsch]

Updating from 2.17 to 2.18.5 fixed the issue, I think. I'll reopen if I encounter it again.

[albsch]

Still happening. A recent PDF with size 185kb is downloaded as size 181kb and corrupted.

[the-djmaze]

Is there a way you can place the EML here so i can take a look?

Forward to issue466@snappymail.eu is also fine

[simonbuehler]

fwiw: with nextcloud i get Content Security Policy: Die Einstellungen der Seite haben das Laden einer Ressource auf eval blockiert ("script-src"). when trying to view a pdf attachement , works with rainloop

url is like https://cloud.x.de/apps/snappymail/run/?/Raw/&q[]=/0/Download/&q[]=/b3BlbnNzbA.euPIkNeIOTvTqX9X-H-lhQ.ITRU-LTSTmriBjkHByALfQ9yZ3OT_AngUGYHEV-N2hKNoGSWu4qA6e-ul8hooe4FQi9xhwG-OjWTGMtIJbyh_5fuIX0pKUpy2uvK4K3BsySHNVfR35e9I8jK3VT9fJGkVxNCv7O-3sIUOmCC-SRyrcBkY0CS3_HCvSjxjM_KYmWrk6F5eTAim6fGonqB4kd0_1quRPehsHYpzyEuXlpPyY1FSQTR0WeL8PKie_eq1uEBvWtS31oqWsK5RdVHsQBHzvMf3drsuuUDoOO-374K-yh64-RknRlePwSXqvtfQ1A

edit: actually no attachement download works...

[the-djmaze]

@simonbuehler your comment is not related to this issue.
It's related to issue #566

[the-djmaze]

I've found a code flow that breaks attachment.
It is partially solved but i need to analyse a few more things regarding the message caching.

[the-djmaze]

Found it. The values in the link are encrypted with the session token.
Since the token expired all links failed (while message is fetched with 304 Not Modified)