# Letter images blank behind proxy server

**URL:** <https://meta.discourse.org/t/letter-images-blank-behind-proxy-server/311957>\
**Category:** Support\
**Created:** [June 13, 2024, 4:06pm UTC](https://meta.discourse.org/t/letter-images-blank-behind-proxy-server/311957 "2024-06-13T16:06:21Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![rbos](https://avatars.discourse-cdn.com/v4/letter/r/b3f665/32.png) [@rbos](https://meta.discourse.org/u/rbos)\
**Post date:** [July 9, 2024, 8:17pm UTC](https://meta.discourse.org/t/letter-images-blank-behind-proxy-server/311957/2 "2024-07-09T20:17:23Z")

</div>

I am still having this problem. I dug into the code a bit, and as I expected, [https://avatars.discourse-cdn.com/#{params[:version]}/letter/#{params[:letter]}/#{params[:color]}/#{params[:size]}.png](https://avatars.discourse-cdn.com/#%7Bparams%5B:version%5D%7D/letter/#%7Bparams%5B:letter%5D%7D/#%7Bparams%5B:color%5D%7D/#%7Bparams%5B:size%5D%7D.png)" is what the code is actually requesting. Within the Discourse container, I’m able to wget the file directly and get a valid PNG. For example: [https://avatars.discourse-cdn.com/v4/letter/b/bcef8e/48.png](https://avatars.discourse-cdn.com/v4/letter/b/bcef8e/48.png) → [https://forum.pkp.sfu.ca/48.png](https://forum.pkp.sfu.ca/48.png)

In production.log, it shows the image being successfully downloaded, allegedly:

```plaintext

Started GET "/presence/get?channels%5B%5D=%2Fdiscourse-presence%2Freply%2F88689&channels%5B%5D=%2Fdiscourse-presence%2Fwhisper%2F88689" for 172.17.1.79 at 2024-07-09 19:59:01 +0000
Processing by PresenceController#get as JSON
Parameters: {"channels"=>["/discourse-presence/reply/88689", "/discourse-presence/whisper/88689"]}
Processing by UserAvatarsController#show_proxy_letter as PNG
Parameters: {"version"=>"v4", "letter"=>"b", "color"=>"bcef8e", "size"=>"48"}
Completed 200 OK in 14ms (Views: 0.5ms | ActiveRecord: 0.0ms | Allocations: 3095)
Completed 418 in 9ms (Views: 0.4ms | ActiveRecord: 0.0ms | Allocations: 1680)

```

So for whatever reason, I’m still getting a blank image. Maybe it’s not using HTTP\_PROXY or HTTPS\_PROXY or something.

In site\_settings.yml, it says that the default letter\_avatar\_proxy url is: `"/letter_avatar_proxy/v4/letter/{first_letter}/{color}/{size}.png"` and when I rightclick on one of the images to get the URL, it is (correctly?) `https://forum.pkp.sfu.ca/letter_avatar_proxy/v4/letter/b/bcef8e/48.png`

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