Issues with uploads using Cloudflare tunnel

[paxiongmao]

Hi All,
Apologies if this is the wrong place for this discussion. I am running Lychee via Portainer / Docker and am using a Cloudflare Tunnel to expose the gallery to the wider world. I'm using the lycheeorg/lyuchee:latest image (5.1.1).

When accessing the instance using an internal IP (192.168.1.x:90) everything works fine. When I change the APP_URL to my domain and redeploy, I can access the gallery (https://gallery.my.domain/gallery), but cannot upload. I get the message "Upload failed. The server returned an error!". Looking at my browser console I see the following error: Unchecked lastError value: Error: Could not establish connection. Receiving end does not exist.

Any help would be much appreciated, I assume there's something else in my config that I need to change, or possibly something with the http/https setup on the tunnel. Diagnostic info below:

Diagnostics
-----------
    Warning: Dropbox import not working. dropbox_key is empty.
    Info: Latest version of PHP is 8.3
    Warning: git (software) is not available.
 

System Information
------------------
    Lychee Version (git):                    ?? (1e3b000) -- Could not compare.
    DB Version:                              5.1.1
    
    composer install:                        --no-dev
    APP_ENV:                                 production
    APP_DEBUG:                               false
    APP_URL:                                 set
    APP_DIR:                                 default
    LOG_VIEWER_ENABLED:                      true
    LIVEWIRE_ENABLED:                        true
    
    System:                                  Linux
    PHP Version:                             8.2.7
    PHP User agent:                          Lychee/4 (https://lycheeorg.github.io/)
    Timezone:                                Europe/London
    Max uploaded file size:                  100M
    Max post size:                           100M
    Livewire chunk size:                     12.00 MB
    Max execution time:                      3600
    MySQL Version:                           10.11.6-MariaDB-1:10.11.6+maria~ubu2204
    
    exec() Available:                        yes
    Imagick Available:                       1
    Imagick Enabled:                         1
    Imagick Version:                         1691
    GD Version:                              2.3.3
    Number of foreign key:                   12 found.

Thanks in advance for any help or pointers.

[ildyria]

Did you set up TRUSTED_PROXIES ?

[relink2013]

I don't know if this helps in this case or not, but CF tunnels have a 100MB file upload limit. This may be what you're hitting and it's dropping the connection.

The only way around this would be to implement chunked uploading like several other apps have had to do.

[ildyria]

He is using the Livewire front-end so that 100MB upload file limit is no longer applicable, we now support the chunked uploading. :)

[paxiongmao]

Hi All,
Thanks for the suggestions. I added the config updates in this issue: (https://github.com/LycheeOrg/Lychee-Docker/issues/175) for trusted proxies and it worked.

For info I didn't need anything on the Cloudflare side to get this working.

Thank you very much for the prompt replies!

[paxiongmao]

Added to the compose file (Portainer stack definition):

TRUSTED_PROXIES: *
APP_URL: https://a.b.com:3444
APP_FORCE_HTTPS: true