Unexpected behaviour with REQUEST_MAX_HEADER_SIZE

[pluzun]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

Hey,
It seems that the REQUEST_MAX_HEADER_SIZE don't rely only Headers size but also on the URL and Method leading to a sanic.exceptions.PayloadTooLarge: Request header exceeds the size limit even if the headers size don't reach the max size: https://github.com/sanic-org/sanic/blob/v23.12.1/sanic/http/http1.py#L172-L197

See the following log with 2 requests with the same headers but with different URL:

sanic[2756545]: [2024-02-14 20:05:26 +0000] [2756545] [CRITICAL] 278 # Headers size 
sanic[2756545]: [2024-02-14 20:05:26 +0000] [2756545] [CRITICAL] [('host', '127.0.0.1:8000'), ('user-agent', 'python-httpx/0.11.1'), ('accept', '*/*'), ('accept-encoding', 'gzip, deflate'), ('connection', 'keep-alive'), ('content-type', 'application/json')]
sanic[2756545]: [2024-02-14 20:05:27 +0000] [2756545] [CRITICAL] 20571 # Headers size with big URL
sanic[2756545]: [2024-02-14 20:05:27 +0000] [2756545] [CRITICAL] [('host', '127.0.0.1:8000'), ('user-agent', 'python-httpx/0.11.1'), ('accept', '*/*'), ('accept-encoding', 'gzip, deflate'), ('connection', 'keep-alive'), ('content-type', 'application/json')]

Code snippet

No response

Expected Behavior

REQUEST_MAX_HEADER_SIZE should only take into account the HTTP Headers and not raise an Exception if the URL is too long.

How do you run Sanic?

As a module

Operating System

Linux

Sanic Version

v23.12.1

Additional context

No response

[Tronic]

This is intended functionality. HTTP/1 header consists of the request line and header lines, that together (also including the newlines that follow) must fit in this limit. Sanic by design cannot make a distinction between different parts of the header. Closing as not a bug.