On 9/25/2013 8:11 PM, Steven D'Aprano wrote:
On Wed, 25 Sep 2013 15:18:41 +0000, Grant Edwards wrote:
The Referer is not an environment variable.
It is when you're writing a CGI app.
How would your shell know what URL you were just browsing?
Because the HTTP server sets those environment variables before invoking
the CGI app.
I stand corrected.
That's a pretty shitty design though, isn't it? Communicating via
environment variables. What is this, 1998? :-)
1993 https://en.wikipedia.org/wiki/Common_Gateway_Interface
Mind you, I'm not sure what other alternatives exist.
Send a series of lines with the same info over an input channel, as was
done 3 years later for FastCGI. Since CGI uses stdout for the finished
product, it could have used stdin for the input. Using a serial channel
does put more burden on the page server to parse the input. But is
allows it to be on a different machine.
--
Terry Jan Reedy
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