in reply to Output should have multiple segments

Arunbear is on track with the approach that I use for getting specific items into the <head> section of pages generated from mason. And I use a similar approach for getting page-specific attributes into the <body> tag too:

autohandler:

<%perl>
# does the requested comp have anything special to tell the body tag?
% my $BodyAttr = $m->comp('REQUEST:body_attr') 
%       if $m->request_comp->method_exists('body_attr');
</%perl>

%# THE OUTPUT
<html>
    <head>
        ...
    </head>
</html>

<& 'SELF:body_tag', attrs => $BodyAttr &>

% $m->call next;

</body>
</html>

<%method body_tag>
<%args>
    $attrs => undef
</%args>
<%perl>
    my $att_str;
    if ($attrs && %$attrs) {
        for (keys %$attrs) {
            $att_str .= sprintf qq[ %s="%s"], $_, $attrs->{$_};
        }       
    }       
</%perl>

<body<% $att_str %>>

</%method>

[download]
Other components provide the body tag attributes as a hash ref 
<%method body_attr>
% my $bd_attr = { class => 'support', onload => q[myInit('foo','bar')]
+};
% return $bd_attr;
</%method>

[download]
OUTPUTS: 
<html>
    <head>
        ...
    </head>
</html>

<body class="support" onload="myInit('foo','bar')">

</body>
</html>

[download]

Note: Quickly hacked together example of the approach, untested.

Note2: OP asked about getting init code into the onload attribute of the body tag. I actually use a different approach, but that's a different discussion that is not perl at all.

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