Assertion Error on Pico W (RP2040)

[AngryChihuahua04]

Hi there!

Was testing this library with the new Pico W, but I keep getting an error: "AssertionError: b'HTTP/1.1 400 BAD REQUEST'". It looks like the Micropython library had this issue and was fixed and I was wondering if there was a fix for this CircuitPython library?

Any and all help is appreciated!

[vniehues]

@AngryChihuahua04 did you ever find a solution to this? Im currently stuck with the same problem

[Neradoc]

That means the server gave a 400 bad request response.
You can use this in your code to activate the logging of the server's response but that probably doesn't contain more info:

import adafruit_logging as logging
LOGGER = logging.getLogger("websockets.client")
LOGGER.setLevel(logging.DEBUG)

It would be interesting to know what server it is, if it's publicly accessible that would help me test it. If it's a server you are running, you could try to get some debug information on why it's not happy.

It might not like the Origin header, or there's something else. I noticed that it does not give the proper scheme: it always uses http://<host>:<port> even over https, that might be the cause.
This would be this line:

websockets-for-circuitpython/uwebsockets/client.py

Line 62 in 46f7827

send_header(b'Origin: http://%s:%s', uri.hostname, uri.port)

[vniehues]

@Neradoc Thanks for your fast response!

the server expected a connection on wss and port 8002 but I was trying to connect with ws on 8001.
the problem is that the "server" is actually a Samsung TV and when I try to connect with wss, I get the error that the certificate is invalid. Duh. Its self signed on a local device, I get that but is there any way to "look past" the certificate with your implementation?

Thanks in advance :)

[vniehues]

Btw, connecting to the TV with Postman using WSS works. It seems to just ignore the invalid certificate, I get no warning

[Neradoc]

Can you paste here the full error ? (The whole stacktrace with the lines and files and stuff).
I'll have to look into it, I'm not sure of what is supported in the picow implementation currently.

[vniehues]

x509-crt-bundle:Failed to verify certificate
OSError: (-12288, 'MBEDTLS_ERR_X509_FATAL_ERROR')

this is all I have unfortunately.. but as I said, I think that's not really a bug but more a feature.
the certificate on the server is bad. but for my project I need to ignore the bad certificate but I didn't find a way to disable the cert check

edit: using micropython instead I can use a very basic implementation that seems to work ok. I'd rather use CircuitPython tho. This is the working implementation