yo, I was doing some stuff, and reading pod like always, when I came accross
$ua->parse_head($boolean)

Get/set a value indicating wether we should initialize response headers from the <head> section of HTML documents. The default is TRUE. Do not turn this off, unless you know what you are doing.
in LWP::UserAgent.

What does "Do not turn this off, unless you know what you are doing" mean?

or should I ask, why shouldn't I turn it off, what exactly is it doing?

I super searched for ->parse_head and I can't believe nothing turned up (well nothing relevant). I took a look at the source, but it's too much for me to grock at the moment, but here is some of it (from LWP::Protocol, sub collect): 
    if ($parse_head && $response->content_type eq 'text/html') {
    $parser = HTML::HeadParser->new($response->{'_headers'});
    }....

[download]
From what I can gather from reading, is that it parses stuff in the head section of html documents, and sets some kind of HTTP headers accordingly. I would appreciate more detail (and of course the answer to the question above).

 
___crazyinsomniac_______________________________________
Disclaimer: Don't blame. It came from inside the void
perl -e "$q=$_;map({chr unpack qq;H*;,$_}split(q;;,q*H*));print;$q/$q;"

In reply to LWP::UserAgent and parse_head by crazyinsomniac

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.