Fileupload through CloudFlare proxy stuck #3554

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opened 2026-02-05 07:03:40 +03:00 by OVERLORD · 0 comments
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Originally created by @towerplease on GitHub (Mar 1, 2023).

Describe the Bug

When i upload some bigger files like > 100MB to Bookstack the upload will not start and is stuck on 0 %.
image
After a while it cancels with error 0.
image

Any idea which CloudFlare configuration could interfere with the fileupload?

PS: Upload max Filesize is configured for like 4 GB Files. In the past (without CloudFlare proxy) i could upload without any problems.

Steps to Reproduce

  1. Access bookstack which is proxied by CloudFlare.
  2. Try to upload files > 100 MB to page.

Expected Behaviour

Upload should start normally.

Screenshots or Additional Context

No response

Browser Details

Opera, Chrome

Exact BookStack Version

V23.02.1

PHP Version

8.1

Hosting Environment

Ubuntu 22.04.2 -> LAMP with CloudFlare proxy.

Originally created by @towerplease on GitHub (Mar 1, 2023). ### Describe the Bug When i upload some bigger files like > 100MB to Bookstack the upload will not start and is stuck on 0 %. ![image](https://user-images.githubusercontent.com/21177236/222100573-8730c5eb-d411-4502-b15a-83eec4517004.png) After a while it cancels with error 0. ![image](https://user-images.githubusercontent.com/21177236/222100673-1d636d09-d847-4e9f-bc0e-916654eaf538.png) Any idea which CloudFlare configuration could interfere with the fileupload? PS: Upload max Filesize is configured for like 4 GB Files. In the past (without CloudFlare proxy) i could upload without any problems. ### Steps to Reproduce 1. Access bookstack which is proxied by CloudFlare. 2. Try to upload files > 100 MB to page. ### Expected Behaviour Upload should start normally. ### Screenshots or Additional Context _No response_ ### Browser Details Opera, Chrome ### Exact BookStack Version V23.02.1 ### PHP Version 8.1 ### Hosting Environment Ubuntu 22.04.2 -> LAMP with CloudFlare proxy.
OVERLORD added the 🐛 Bug label 2026-02-05 07:03:40 +03:00
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Reference: starred/BookStack#3554