Order of HTTP request headers

kappa has asked for the wisdom of the Perl Monks concerning the following question:

Good day, fellow monks!

Is there a way to get the order of HTTP headers the client sent to us using mod_perl? It looks like HTTP headers always get to Perl level represented as hash.

--kap

Comment on Order of HTTP request headers

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Re: Order of HTTP request headers by Fletch (Bishop) on Oct 14, 2008 at 15:42 UTC
One wonders, erm, why? The order is neither specified nor significant (apart from a general recommended ordering of header types), so why do you think it's of any use? (Having said that, `$r->headers_in` returns an APR::Table instance rather than a true hash, and that class supports a method `$tbl->do( $callback )` which iterates over the items in the table passing key/value paris to the callback (presumably in order as the APR::Table docs specifies keys are stored in the order added). That might get what you're looking for.) The cake is a lie. The cake is a lie. The cake is a lie.	[reply] [d/l] [select]
Re^2: Order of HTTP request headers by kappa (Chaplain) on Oct 31, 2008 at 23:06 UTC
We're trying to use the order of HTTP request headers as a factor in our antifraud system. We found out that our beloved bots send the headers in a distinctly different order than all current browsers. Thanks for the advice! Too bad our main system uses Apache 1.3 but we'll probably use the APR::Table in another place. --kap	[reply]