I can NOT connect Chome WT API to this implementation

[jordicenzano]

I created a super simple example that shows how Chome (Version 119.0.6045.123 (Official Build) (arm64)) gets a establishment connection error when tries to connect to this WT server

See example and repro steps here: https://github.com/jordicenzano/simple-wt-server

PS: Exact same code and steps with github.com/adriancable/webtransport-go works perfectly (with small tweaks on go code to adapt to this lib)

[marten-seemann]

Thanks for the repro, I ran it on my machine and it fails as well.

I suspect this is because it's using RSA keys: see https://www.w3.org/TR/webtransport/#web-transport-configuration (last paragraph). Can you try switching to non-RSA keys?

[jordicenzano]

Thanks a lot for testing this, but when I use a ECDSA keys I get the exact same error. This is what I use to create those keys:

openssl req -new -newkey ec -pkeyopt ec_paramgen_curve:prime256v1 -x509 -nodes -days 10 -out ../certs/certificate.pem -keyout ../certs/certificate.key -subj '/CN=Test Certificate' -addext "subjectAltName = DNS:localhost"

[marten-seemann]

Have you also updated https://github.com/jordicenzano/simple-wt-server/blob/main/scripts/start-localhost-test-chrome.sh#L4? Could you push your change?

[jordicenzano]

Yes, I updated that script (IDK if I did properly TBH)

I just pushed the changes

[marten-seemann]

@jordicenzano Can you try running the interop code? It works on CI. If it doesn't work on your machine, this might be because Chrome changed something.

[jordicenzano]

Sorry for my late reply, it is faling too:

 interop git:(master) ✗ python3 interop.py
Traceback (most recent call last):
  File "/Users/jcenzano/joccode/webtransport-go/interop/interop.py", line 32, in <module>
    driver.get("http://localhost:8080/webtransport")
  File "/Users/jcenzano/homebrew/lib/python3.11/site-packages/selenium/webdriver/remote/webdriver.py", line 356, in get
    self.execute(Command.GET, {"url": url})
  File "/Users/jcenzano/homebrew/lib/python3.11/site-packages/selenium/webdriver/remote/webdriver.py", line 347, in execute
    self.error_handler.check_response(response)
  File "/Users/jcenzano/homebrew/lib/python3.11/site-packages/selenium/webdriver/remote/errorhandler.py", line 229, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: unknown error: net::ERR_CONNECTION_REFUSED
  (Session info: headless chrome=119.0.6045.159)
Stacktrace:
0   chromedriver                        0x0000000104a3e004 chromedriver + 4169732
1   chromedriver                        0x0000000104a35ff8 chromedriver + 4136952
2   chromedriver                        0x000000010468b500 chromedriver + 292096
3   chromedriver                        0x0000000104683f20 chromedriver + 261920
4   chromedriver                        0x0000000104674790 chromedriver + 198544
5   chromedriver                        0x0000000104675bd0 chromedriver + 203728
6   chromedriver                        0x0000000104674aec chromedriver + 199404
7   chromedriver                        0x00000001046739d0 chromedriver + 195024
8   chromedriver                        0x000000010467397c chromedriver + 194940
9   chromedriver                        0x0000000104671ef4 chromedriver + 188148
10  chromedriver                        0x00000001046729e0 chromedriver + 190944
11  chromedriver                        0x000000010468debc chromedriver + 302780
12  chromedriver                        0x000000010470bda4 chromedriver + 818596
13  chromedriver                        0x000000010470b818 chromedriver + 817176
14  chromedriver                        0x00000001046c45e8 chromedriver + 525800
15  chromedriver                        0x00000001046c54b8 chromedriver + 529592
16  chromedriver                        0x0000000104a04334 chromedriver + 3932980
17  chromedriver                        0x0000000104a08970 chromedriver + 3950960
18  chromedriver                        0x00000001049ec774 chromedriver + 3835764
19  chromedriver                        0x0000000104a09478 chromedriver + 3953784
20  chromedriver                        0x00000001049deab4 chromedriver + 3779252
21  chromedriver                        0x0000000104a25914 chromedriver + 4069652
22  chromedriver                        0x0000000104a25a90 chromedriver + 4070032
23  chromedriver                        0x0000000104a35c70 chromedriver + 4136048
24  libsystem_pthread.dylib             0x0000000183265034 _pthread_start + 136
25  libsystem_pthread.dylib             0x000000018325fe3c thread_start + 8