BadStatusLine: 400 not expected random exceptions

[iandresolares]

Describe the bug

Hi, I have setup a webserver which handles some POST requests. This works fine, however when the server is running for some hours I start to see some errors handling requests which were not supposed to happen: Error handling request Traceback (most recent call last): File "/usr/local/lib/python3.9/dist-packages/aiohttp/web_protocol.py", line 314, in data_received messages, upgraded, tail = self._request_parser.feed_data(data) File "aiohttp/_http_parser.pyx", line 546, in aiohttp._http_parser.HttpParser.feed_data aiohttp.http_exceptions.BadStatusLine: 400, message="Bad status line 'invalid HTTP method'"

This happens a few times every few hours and I am the only one doing requests to the webserver right now so I have control of them. I have read some issues having similar problems but I still can't find a solution. What are these requests which fail? It doesn't make my system fail or anything but it is very annoying to try to find something in the logs and just see a bunch of these exceptions and I haven't been able to wrap it in a Try Except block. Where should I place this try except block if that would be the solution?

To Reproduce

1. Set up a webserver:

app = web.Application()
app.add_routes([web.post("/whatever", handler)])

async def create_webserver():
    runner = web.AppRunner(app)
    await runner.setup()
    site = web.TCPSite(runner)
    await site.start()

await create_webserver()

2. Run it.

Expected behavior

To not get BadStatusLine: 400 exception when there are no expected requests.

Logs/tracebacks

Error handling request
Traceback (most recent call last):
  File "/usr/local/lib/python3.9/dist-packages/aiohttp/web_protocol.py", line 314, in data_received
    messages, upgraded, tail = self._request_parser.feed_data(data)
  File "aiohttp/_http_parser.pyx", line 546, in aiohttp._http_parser.HttpParser.feed_data
aiohttp.http_exceptions.BadStatusLine: 400, message="Bad status line 'invalid HTTP method'"

Python Version

Version: 3.9.10

aiohttp Version

Version: 3.7.4

multidict Version

Version: 5.2.0

yarl Version

Version: 1.7.2

OS

Ubuntu 20.04

Related component

Server

Additional context

No response

Code of Conduct

• [x] I agree to follow the aio-libs Code of Conduct

[mousetail]

This error happens whenever there is a request with a invalid HTTP verb. Any production server will receive many invalid requests and they shouldn't all throw errors. This buries real errors in the code. Such issues should be logged separately.