Subject: Issue with Updating Extension in MODX 3.0.5

auribus · November 4, 2024, 3:31pm

Hello everyone,

I have been using MODX for over 10 years for my personal website, and I recently encountered an issue while trying to update the “Collections” extension to version 4.1.0-pl. Every time I attempt the update, I receive the following error messages:

Console running...
PHP deprecated: Creation of dynamic property MODX\Revolution\modConnectorResponse::$response is deprecated
Attempting to install package with signature: collections-4.1.0-pl
Package found...now preparing to install.
PHP deprecated: Creation of dynamic property MODX\Revolution\modConnectorResponse::$response is deprecated
Grabbing package workspace...
Workspace environment initiated, now installing package...
Attempting to preserve files at /home/bergerie/www/core/components/collections into archive /home/bergerie/www/core/packages/collections-4.1.0-pl/MODX/Revolution/modNamespace/a0e585751a7d744d796d14e1e9ed8ae0.0.preserved.zip
Attempting to preserve files at /home/bergerie/www/assets/components/collections into archive /home/bergerie/www/core/packages/collections-4.1.0-pl/MODX/Revolution/modNamespace/a0e585751a7d744d796d14e1e9ed8ae0.1.preserved.zip
Install failed with ValueError in /core/vendor/xpdo/xpdo/src/xPDO/Compression/pclzip.lib.php:2678: fread(): Argument #2 ($length) must be greater than 0
Could not install package with signature: collections-4.1.0-pl

I am currently using MODX version 3.0.5 and PHP 8.0. I have tried several troubleshooting steps, including checking file permissions and ensuring my MODX installation is up to date, but the issue persists.

Additionally, I am experiencing the exact same problem with other packages such as Gallery, modDevTools, and Guzzle7.

Could anyone provide guidance on how to resolve this issue? Any help would be greatly appreciated.

Thank you!

halftrainedharry · November 4, 2024, 3:41pm

The problem is the PclZip library.
PclZip is on old MODX depenency (that is no longer maintained and can’t handle empty file in PHP 8).

PclZip is only used (as a fallback) if your PHP installation doesn’t have the zip extension (or if the system setting archive_with is explicitely set).

pclzip and zero length files in PHP 8.x

opened 12:41PM - 18 Oct 24 UTC

Jako

xPDO 2.x has issues with zero length files in PHP 8.x. The same code works fine …in PHP 7.x. The same issue may occur with xPDO 3.x. ``` PHP Fatal error: Uncaught ValueError: fread(): Argument #2 ($length) must be greater than 0 in /…/core/xpdo/compression/pclzip.lib.php:2678 ``` I am not sure why this issue occurs only in PHP 8.x, but creating a transport file with PHP 7.4 works well and not with PHP 8.1/8.2 during my tests when an empty file (.gitignore in my case) exists in a folder in a package. If the file has a length of 1 byte everything works well. It is more of a guide as to why the issue is occurring and how it can be resolved.

auribus · November 7, 2024, 7:15am

Big Thanks for help.
“archive_with” was set to “yes” in system settings. “no” solves the issue.