Exception thrown on Nginx servers

[baltauger]

Hello!

Running the ufront-hello example on a Nginx server throws the folliwing exception:

uncaught exception: Call to undefined function apache_request_headers()

Called from sys.ufront.web.context.HttpRequest::get_clientHeaders
Called from ufront.remoting.RemotingHandler::handleRequest
Called from ufront.app.HttpApplication::setContentDirectory@326
Called from ufront.app.HttpApplication::executeModules@402
Called from ufront.app.HttpApplication::executeModules
Called from ufront.app.HttpApplication::setContentDirectory@352
Called from tink.core._Future.Future_Impl_::_tryFailingFlatMap@110
Called from tink.core._Future.Future_Impl_::trigger@34
Called from tink.core.FutureTrigger::new@146
Called from tink.core._Future.Future_Impl_::map@34
Called from tink.core._Future.Future_Impl_::gather@18
Called from tink.core._Future.Future_Impl_::flatten@53
Called from tink.core._Future.Future_Impl_::gather@18
Called from tink.core._Future.Future_Impl_::trigger@55
Called from tink.core.FutureTrigger::new@146
Called from tink.core._Future.Future_Impl_::gather@18
Called from tink.core._Future.Future_Impl_::flatten@53
Called from tink.core._Future.Future_Impl_::gather@18
Called from ufront.app.HttpApplication::execute
Called from ufront.app.UfrontApplication::execute
Called from ufront.app.HttpApplication::executeRequest
Called from net.txori.baston.server.Main::main

I tracked this down to the fact that FastCGI is missing an implementation of apache_request_headers, upon which ufront relies in its HttpRequest class.

Defining the function by hand in php before ufront loads works, but I believe that the framework could and should handle this gracefully.