invalid character in header url

[saarsa]

my python env
Python 3.8.5
aiohttp 3.7.4.post0
multidict 5.1.0
yarl 1.6.3
Hi sorry for the question but I have an error that I can not understand
I'm trying to run this code
`async def main():
async with aiohttp.ClientSession() as session:
async with session.get("https://tase.co.il") as resp:
print(resp.status)
print(await resp.text())

loop = asyncio.get_event_loop()
loop.run_until_complete(main())`

But it brings me back
raise ClientResponseError(aiohttp.client_exceptions.ClientResponseError: 400, message='invalid character in header', url=URL('https://www.tase.co.il/')
Why is this happening to me?

[g66-gopanear]

I am getting the same issue.
This is my header : {'X-Avangate-Authentication': 'code="255435546325215709" date="2021-06-11 09:14:04" hash="f312b75343er41f44dce26a3d4fdb6dc3e5a0"'}

[Hanaasagi]

@saarsa
It's the server' problem. It has a invisible char \x01 in the response header.

Run this command in you shell.

curl https://tase.co.il/ --http1.1 -L -ivs --user-agent "Python/3.9 aiohttp/3.7.4" -H "Accept-Encoding: gzip, deflate" -vvv > output

And use the vim to open this file output

The highlight place is the invalid char. Use some hex editor tools to check this position, it's \x01.

---

The http-parser's validation rules:
https://github.com/nodejs/http-parser/blob/2343fd6b5214b2ded2cdcf76de2bf60903bb90cd/http_parser.c#L445-L451

/**
 * Verify that a char is a valid visible (printable) US-ASCII
 * character or %x80-FF
 **/
#define IS_HEADER_CHAR(ch)                                                     \
  (ch == CR || ch == LF || ch == 9 || ((unsigned char)ch > 31 && ch != 127))

[Hanaasagi]

@g66-gopanear Please check the server's response header.

[Hanaasagi]

Please reopen if your have other questions.