Micah Johnson wrote:
Hi,

I'm trying to use a pre-existing CGI script without
modification.  I'd like to use an input filter to tack
on something to the POST string.  My filter adds the
string, but the CGI sees a CONTENT_LENGTH
environmental variable that corresponds to its
original length.  How do I update the CONTENT_LENGTH?

You can do that only in the Connection level filter, Request level filter is too late.


I've tried setting %ENV in my filter, setting
CONTENT_LENGTH with $f->r->subprocess_env, and using
headers_out->set('Content-Length').  In the first two
         ^^^^

That's headers *out* (==response), you want headers_in. I haven't tried that, but it may work in any phase before the response handler (instead of connection filter).

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