RequestProcessor causes fatal errors for users on subnets due to issues with IpUtils::checkIp6

[sydseter]

Some users have reported Fatal error message when trying to downloading css files from internal networks. This leads to the site being rendered without css which leads to issues for customers. Our reverse proxy caches these responses which aggravate the issue.

The issue happens in the pre 2.8.2 release of http-foundation's IpUtils::checkIp6 the 3.0.2 possibly fixes the issue: https://github.com/symfony/http-foundation/commits/652e8af9d22c16c5b6556048136021db0b8c6640/IpUtils.php

We should consider upgrading to 3.0.2 and possibly also add a try catch around:

silex-extras/src/Aptoma/Log/RequestProcessor.php

Line 35 in d8348a5

$record['extra']['clientIp'] = $this->getClientIp($this->app['request_stack']);

[gunnarlium]

symfony/http-foundation requires php >=5.5.9, so until we migrate to a new platform, that's off the table.

I think the try/catch approach is preferable. Not getting the client ip in the logs for a few requests is not that big a deal, as long as we keep a ticket open for upgrading once our platform is ready.