Fix for slashes hosing Symfony URLs
Sometimes a parameter in a GET string contains slashes, which are interpreted as file path delimeters by Apache and/or parameter name/value separators by Symfony.
So this URL works: http://myapp/employee/bytitle/title/System+Engineer
But this one returns a 404 (Page Not Found) error: http://myapp/employee/bytitle/title/Programmer/analyst
Double-escaping the slash into ‘%252F’ (e.g.
urlencode(str_replace('/', "%2f", $this->getTitle()))) works if the URL isn’t rewritten by Apache.
This threw me because my URLs would work if they included the name of the controller file, frontend_dev.php or backend.php or even index.php like http://myapp/index.php/employee/bytitle/title/Programmer%252Fanalyst,
but they wouldn’t work through the implicit, controllerless URLs like http://myapp/employee/bytitle/title/Programmer%252Fanalyst
- Turn on the AllowEncodedSlashes Apache directive by adding this line to your server-wide section or the appropriate VirtualHost:
- DON’T double-escape the parameter as above, but do use urlencode() or equivalent to change slashes to
%2F, eg. in the view layer,
<?php echo link_to( $employee->getTitle(), '/employee/bytitle?title='. urlencode($employee->getTitle()) ); ?>
Browsers may treat the encoded slash in the URL differently.
IE 7, 8 and Firefox 3, and Safari 3.2.1 on Windows display the URL in the address bar with the %2F intact, as you’d expect.
In Google Chrome 18.104.22.168, the links work but the address bar displays a slash instead of the encoded %2F, so if you hit the “Go” button you get a 404 error. Weird. Bug submitted!