[4.2] webclient user agents

[david19161]

Steps to reproduce the issue

Somehow! set your user agent to "Chrome Privacy Preserving Prefetch Proxy"

Expected result

no warnings

Actual result

Undefined array key 1 in libraries/vendor/joomla/application/src/Web/WebClient.php on line 439

System information (as much as possible)

joomla 4.2.6
php 8.0.23

Additional comments

seeing a lot of these in the php error log.
its obvious why, there is no "/" in the user agent string

[ReLater]

Something seems to be wrong with your testing instructions. Line 439 is surrounded by

elseif (stripos($userAgent, 'Chrome') !== false)
{

}

but there is no Chrome in your UserAgent string.

[ReLater]

For reference: https://developers.google.com/search/docs/crawling-indexing/overview-google-crawlers

As far as I see Google never adds the string Chrome/W.X.Y.Z to Feedfetcher user agents or just Chrome.

It looks like somebody is visiting your site with a badly faked user agent. Block them!

Or do I miss something?

[david19161]

corrected instructions

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/39637.}

[david19161]

user agent is "Chrome Privacy Preserving Prefetch Proxy"

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/39637.}

[ReLater]

Maybe a solution could be:

elseif (stripos($userAgent, 'Chrome/') !== false)

The correct repository for this issue is https://github.com/joomla-framework/application

I'm out.

[Simran180]

can I work on this issue?

[alikon]

there is no need to ask, please submit your pull request

[ReLater]

@Simran180

Like said in #39637 (comment) it's not the joomla-cms repository here but joomla-framework. See joomla-framework/application#112 there.

[Rartg]

Add a "/" to the end of the user agent string.
Update the version of Joomla or PHP to ensure compatibility with the user agent string.

[brianteeman]

Closing this here as a relevant issue has been created in the upstream library