Updating uploaded .txt file containing long contents throw an error

[saw-jan]

Note: works fine for .md file

Steps to reproduce

1. upload a .txt file with large contents
2. open file in the editor
3. try to save some changes on the editor

Error message:

Video Reference:

record101.mp4

Server configuration

Operating system: Ubuntu 20.04

Web server: Apache

Database: MySql

PHP version: 7.4.3

ownCloud version: 10.6.1alpha (git)

List of activated apps:

Enabled:
  - comments: 0.3.0
  - dav: 0.6.0
  - federatedfilesharing: 0.5.0
  - federation: 0.1.0
  - files: 1.5.2
  - files_external: 0.7.1
  - files_sharing: 0.14.0
  - files_trashbin: 0.9.1
  - files_versions: 1.3.0
  - notifications: 0.5.2
  - oauth2: 0.5.0
  - provisioning_api: 0.5.0
  - systemtags: 0.3.0
  - testing: 0.1.0
  - updatenotification: 0.2.1

[pascalwengerter]

@saw-jan do you have any indication how large the file has to be for the error to occur? :)

[saw-jan]

The issue is still relevant.
@pascalwengerter, you can use the lorem-big.txt from tests/e2e/filesForUpload. I retested with that one.

[AlexAndBear]

related to #6947