Plack::...tLength(3)

💖 Plack::Middleware::ContentLength — or as the man page header calls it, Plack::...tLength(3) ✨

okay bestie, gather round, because this one is a little slice of Perl-flavored heaven from the User Contributed Perl Documentation collection 🫶

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🌸 NAME 🌸

Plack::Middleware::ContentLength — it adds the Content-Length header for you, automatically, no cap 💅

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✨ SYNOPSIS ✨

like, here's the vibe. first up, in your app.psgi:

# in app.psgi

builder {
    enable "Plack::Middleware::ContentLength";
    $app;
}

or, if you're doing it in Plack::Handler::* instead:

# Or in Plack::Handler::*

$app = Plack::Middleware::ContentLength->wrap($app);

see? two ways, both iconic, pick your fighter 🎀

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🦋 DESCRIPTION 🦋

Plack::Middleware::ContentLength is a middleware that automatically adds the "Content-Length" header when it's appropriate — okay so what counts as appropriate? literally: when the response has a content body with a calculable size. and what has a calculable size, you ask? an array of chunks, or a real filehandle. that's it, that's the tea ☕

and here's the lowkey underrated part: this middleware can also be used as a library from PSGI server implementations 🌈 so instead of setting Content-Length at the end user level, the server implementations can just set it themselves. delegation, but make it slay 👑

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👑 AUTHOR 👑

Tatsuhiko Miyagawa — the icon, the moment, the main character 💖

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💜 SEE ALSO 💜

• Rack::ContentLength — yes bestie, the Rack girlies have one too, we're all connected 🦋

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fr fr, that's the whole page. every flag, every behavior, every vibe — all accounted for, no details ghosted 💀

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and that's a wrap, my love! 🌸 this lil' page came to you courtesy of perl v5.42.3, dated 2026-10-18, filed under Plack::...tLength(3). obsessed with her. periodt 💅✨