#216 — Translation links break when using Virtual Host Monster

The workaround above seems to break some things. Here's a better one:

Undo the above workaround and instead create a new theme add-on product with the following in the browser/ folder:

selector.py:
from Products.LinguaPlone.browser.selector import TranslatableLanguageSelector
class LanguageSelector(TranslatableLanguageSelector):
    def languages(self):
        results = TranslatableLanguageSelector.languages(self)
        for data in results:
            data['url'] = data['url'].replace('VirtualHostRoot', 'switchLanguage').replace('&-C=', '')
        return results

configure.zcml:
...
    <browser:viewlet name="plone.app.i18n.locales.languageselector"
        manager="plone.app.layout.viewlets.interfaces.IPortalTop"
        class=".selector.LanguageSelector"
        permission="zope2.View" layer=".interfaces.IThemeSpecific" />
...

Here's a pdb session with a couple of "p" statements (see attachment). From the debugger, it seems that the "VirtualHostRoot" problem only occurs when the URL passed by Apache *ends* in "VirtualHostRoot", that is, in the site root. For example,

(Pdb) p current_path
['VirtualHostBase', 'http', 'example.com:80', 'Plone', 'VirtualHostRoot']

results in the broken

(Pdb) p state.view_url() + appendtourl
'http://example.com/VirtualHostRoot?set_language=en&-C='

but

(Pdb) p current_path
['VirtualHostBase', 'https', 'example.com:443', 'Plone', 'VirtualHostRoot', 'news']

results in

(Pdb) p state.view_url() + appendtourl
'https://example.com/news?set_language=en&-C='

Don't know what that empty "-C" form variable is doing there. Would you happen to have any idea what it's for or where it comes from? It didn't use to be there earlier and I'm not passing it myself.