[bitreq] Add default size limits for headers, status line, and body #463
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While its hard to say what size body a client wants, HTTP headers and status line should be quite limited and its very easy for a dev to forget to set a reasonable limit. Here we limit the total header size to the same value used in Chrome, which seems like a pretty safe limit, and the status line limit to a quarter of that (which is really absurd for a status line).
Because its very easy to (mis-)use the API and forget to set a response size limit, we really should have a default one. Sadly, its also quite hard to pick a reasonable default here. Rather than being conservative, we pick 1 GiB and hope that this is enough to avoid an OOM, even though its still quite huge, and almost certainly is larger than what people will use `bitreq` for.
jamillambert
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Jan 16, 2026
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jamillambert
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ACK dfa0ce9
nit: Could be defined as consts e.g. DEFAULT_MAX_HEADER_SIZE to make it easier to understand what the numbers are when scanning over the code.
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I realize we also don't have default size limits for the total response headers or status line, which is quite a large footgun. Instead, here we adopt the default response header limit from chrome and set a status line limit of 1/4 of that. Also adds a 1GiB default body response just to have some limit even if its incredibly high and we still document that folks should really set it.
IMO we should cut this as 0.3.1.