[quicwg/base-drafts] Error code to be sent when the size of request headers exceed server's limit (#2775)

[Kazuho Oku <[e-mail]>]

At the moment, the HTTP spec says that "an HTTP/3 implementation MAY impose a limit on the maximum size of the header it will accept on an individual HTTP message; encountering a larger message header SHOULD be treated as a stream error of type `HTTP_EXCESSIVE_LOAD`."

Is this the intended behavior?

IIUC, HTTP_EXCESSIVE_LOAD indicates a temporary issue inside the server; a client is allowed to retransmit the request hoping that it would succeed the next time. In contrary to that, I view the size of the request exceeding the maximum imposed by the server to be a permanent error, and therefore that a different error code should be used. Or even better a HTTP status code, because what we want here is not a hop-by-hop signal; the other benefit of suggesting the use of a HTTP status code is that it removes the risk of the connection getting shut down (an action that affects other requests).


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