[Catalyst] FastCGI fails with file extension mapped configuration for IIS

[Stuart Watt]

I've used an IIS hack engine for a good while, and finally got around to =

switching to the main C::E::FastCGI with a few issues.

1. It works fine, apparently on IIS5
2. It does not work, at least not the way I have it configured, on IIS6

The issue revolves around the IIS handling of some request parameters; I =

get:

PATH_INFO: /m3analyst/arm.fcgi/index
PATH_TRANSLATED: C:\Sites\ARM\arm.fcgi\index
SCRIPT_NAME: /m3analyst/arm.fcgi

Problem #1 - the condition is: ( $env->{SERVER_SOFTWARE} =3D~ =

/IIS\/[6-9]\.[0-9]/ )

This seems to explain why IIS5 is not affected in the same way. The =

FastCGI component works just fine on IIS5, so I guess this ought to be =

included/processed.

Problem #2 - FastCGI engine cannot handle IIS with file extension mapped =

configuration for FastCGI

Obviously, IIS is broken with respect to some request parameters.

The algorthm for fixing IIS appears to be to pop items off a split =

PATH_INFO and a split PATH_TRANSLATED as long as they are the same, =

unshifting (!) the consistent items into a new value for PATH_INFO. =

Whatever was left on the old PATH_INFO is put into SCRIPT_NAME. The =

result of my request above, therefore, is:

PATH_INFO =3D /arm.fcgi/index
SCRIPT_NAME =3D /m3analyst

Since this is incorrect against the namespacing, Catalyst hits the =

default action for everything.

This ought to be:

PATH_INFO =3D /index
SCRIPT_NAME =3D /m3analyst/arm.fcgi

My hacky IIS engine did a rather simpler:

        my $path =3D $env{PATH_INFO};
        my $script =3D $env{SCRIPT_NAME};
        my $length =3D length($script);
        if (substr($path, 0, $length) eq $script) {
            $env{PATH_INFO} =3D substr($path, $length);
        }

i.e., I left SCRIPT_NAME alone, but removed it from the front of =

PATH_INFO when it matched exactly.

The documentation implies that a wildcard mapping is recommended =

(although this is not supported by IIS5). I suspect the algorithm is =

completely correct on IIS6/7 with a wildcard mapping.

Is this likely to require a patch to allow FastCGI to work with file =

extension mapping? Shall I write one?

All the best
Stuart
-- =

Stuart Watt
ARM Product Developer
Information Balance
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