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[GH-ISSUE #1782] Error 500 on user creation #1403

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opened 2026-02-27 11:16:55 +03:00 by kerem · 6 comments
kerem commented 2026-02-27 11:16:55 +03:00
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Originally created by @benjaminbellamy on GitHub (Oct 5, 2019).
Original GitHub issue: https://github.com/modoboa/modoboa/issues/1782

I don’t know if this is a bug or a hidden feature, but you cannot add new accounts after updating /srv/modoboa/instance/sitestatic/css/modoboa.png

Impacted versions

  • Modoboa: 1.14.0
  • installer used: Yes
  • Webserver: Nginx

Steps to reproduce

  • Install Modoboa
  • Design a nice logo with Gimp (or MS Paint if you live in 1984 or Photoshop if you love DRMs)
  • Replace /srv/modoboa/instance/sitestatic/css/modoboa.png with your logo.
  • Add a new identity/mailbox and…
  • Patatra !

Current behavior

Error 500

IOError at /admin/accounts/new/
cannot identify image file <open file u'/srv/modoboa/instance/sitestatic/css/modoboa.png', mode 'rb' at 0x7f4171dc9390>
fileName=u'/srv/modoboa/instance/sitestatic/css/modoboa.png' identity=[ImageReader@0x7f4171e5acd0 filename=u'/srv/modoboa/instance/sitestatic/css/modoboa.png']

Request Method: POST
Request URL: https://xxx/admin/accounts/new/
Django Version: 1.11.24
Python Executable: /usr/bin/uwsgi-core
Python Version: 2.7.15
Python Path: ['.', '', '/srv/modoboa/env/lib/python2.7', '/srv/modoboa/env/lib/python2.7/plat-x86_64-linux-gnu', '/srv/modoboa/env/lib/python2.7/lib-tk', '/srv/modoboa/env/lib/python2.7/lib-old', '/srv/modoboa/env/lib/python2.7/lib-dynload', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-x86_64-linux-gnu', '/usr/lib/python2.7/lib-tk', '/srv/modoboa/env/local/lib/python2.7/site-packages', '/srv/modoboa/env/lib/python2.7/site-packages']
Server time: Sat, 5 Oct 2019 15:54:30 +0200

Expected behavior

Create new account with no Error 500?

Originally created by @benjaminbellamy on GitHub (Oct 5, 2019). Original GitHub issue: https://github.com/modoboa/modoboa/issues/1782 I don’t know if this is a bug or a hidden feature, but you cannot add new accounts after updating `/srv/modoboa/instance/sitestatic/css/modoboa.png` # Impacted versions * Modoboa: 1.14.0 * installer used: Yes * Webserver: Nginx # Steps to reproduce * Install Modoboa * Design a nice logo with Gimp (or MS Paint if you live in 1984 or Photoshop if you love DRMs) * Replace `/srv/modoboa/instance/sitestatic/css/modoboa.png` with your logo. * Add a new identity/mailbox and… * **Patatra !** # Current behavior **Error 500** ``` IOError at /admin/accounts/new/ cannot identify image file <open file u'/srv/modoboa/instance/sitestatic/css/modoboa.png', mode 'rb' at 0x7f4171dc9390> fileName=u'/srv/modoboa/instance/sitestatic/css/modoboa.png' identity=[ImageReader@0x7f4171e5acd0 filename=u'/srv/modoboa/instance/sitestatic/css/modoboa.png'] Request Method: POST Request URL: https://xxx/admin/accounts/new/ Django Version: 1.11.24 Python Executable: /usr/bin/uwsgi-core Python Version: 2.7.15 Python Path: ['.', '', '/srv/modoboa/env/lib/python2.7', '/srv/modoboa/env/lib/python2.7/plat-x86_64-linux-gnu', '/srv/modoboa/env/lib/python2.7/lib-tk', '/srv/modoboa/env/lib/python2.7/lib-old', '/srv/modoboa/env/lib/python2.7/lib-dynload', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-x86_64-linux-gnu', '/usr/lib/python2.7/lib-tk', '/srv/modoboa/env/local/lib/python2.7/site-packages', '/srv/modoboa/env/lib/python2.7/site-packages'] Server time: Sat, 5 Oct 2019 15:54:30 +0200 ``` # Expected behavior Create new account with no Error 500?
kerem closed this issue 2026-02-27 11:16:56 +03:00
kerem commented 2026-02-27 11:16:56 +03:00
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@tonioo commented on GitHub (Oct 11, 2019):

@benjaminbellamy Are you sure your image is not corrupted? Is it a real PNG file?

<!-- gh-comment-id:541077519 --> @tonioo commented on GitHub (Oct 11, 2019): @benjaminbellamy Are you sure your image is not corrupted? Is it a real PNG file?
kerem commented 2026-02-27 11:16:56 +03:00
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@benjaminbellamy commented on GitHub (Oct 11, 2019):

Yes, the PNG is perfectly displayed, everything works fine. I just can’t create new mailboxes.
And when I put the original PNG file back I can create accounts again.

<!-- gh-comment-id:541143661 --> @benjaminbellamy commented on GitHub (Oct 11, 2019): Yes, the PNG is perfectly displayed, everything works fine. I just can’t create new mailboxes. And when I put the original PNG file back I can create accounts again.
kerem commented 2026-02-27 11:16:56 +03:00
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@tonioo commented on GitHub (Oct 13, 2019):

@benjaminbellamy The error is pretty clear: cannot identify image file <open file u'/srv/modoboa/instance/sitestatic/css/modoboa.png. Your PNG file must be special in some way...

<!-- gh-comment-id:541412629 --> @tonioo commented on GitHub (Oct 13, 2019): @benjaminbellamy The error is pretty clear: ``cannot identify image file <open file u'/srv/modoboa/instance/sitestatic/css/modoboa.png``. Your PNG file must be special in some way...
kerem commented 2026-02-27 11:16:56 +03:00
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@benjaminbellamy commented on GitHub (Oct 15, 2019):

I don’t see anything special about this file. It is displayed fine by Nginx/browser.
I even tried with a blank png file, same size, same error.
Weird.
Why is this happening on user creation? How is user creation related to a PNG file?

<!-- gh-comment-id:542230399 --> @benjaminbellamy commented on GitHub (Oct 15, 2019): I don’t see anything special about this file. It is displayed fine by Nginx/browser. I even tried with a blank png file, same size, same error. Weird. Why is this happening on user creation? How is user creation related to a PNG file?
kerem commented 2026-02-27 11:16:56 +03:00
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@benjaminbellamy commented on GitHub (Oct 15, 2019):

I just got it: the PDF file created with the user credential needs the PNG file.

<!-- gh-comment-id:542233650 --> @benjaminbellamy commented on GitHub (Oct 15, 2019): I just got it: the PDF file created with the user credential needs the PNG file.
kerem commented 2026-02-27 11:16:56 +03:00
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@benjaminbellamy commented on GitHub (Oct 15, 2019):

OK, I found it: PNG file must have NO metadata at all.
I removed them, now it works.

For instance when exporting to PNG using Gimp, you must uncheck all checkboxes (uncheck "Save Exif data"…).
Comments for PIL/Image.py open() function says "This is a lazy operation;"… Well it kinda is lazy…
(I had checked my PNG file header with Hex editor and they were clean.)

<!-- gh-comment-id:542243006 --> @benjaminbellamy commented on GitHub (Oct 15, 2019): OK, I found it: **PNG file must have NO metadata at all.** I removed them, now it works. For instance when exporting to PNG using Gimp, you must uncheck all checkboxes (uncheck `"Save Exif data"`…). Comments for PIL/Image.py open() function says `"This is a lazy operation;"`… Well it kinda is lazy… (I had checked my PNG file header with Hex editor and they were clean.)
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