Microsoft Teams Webhook Connector "200 OK" status insufficient indication of success

[atc0005]

From rveachkc/pymsteams#75:

I did use a script to verify the size constraints, and I'll detail it below if it's interesting, but I talked with the Teams team and believe I found a better way.

It seems the reason for the 200 status in cases where the message doesn't send is due to 3rd party connectors, incorrectly, handling errors by deleting the configuration.

tl;dr

The team let me know that the content of the response will be '1' when the message is sent successfully. So I propose updating the check before returning in send from if r.status_code == requests.codes.ok: to if r.status_code == requests.codes.ok and r.text == '1'

Needs further research/testing. Further notes from that GH issue:

It's seemingly the combined data size sent that effects it
Without a summary, I get an exception so I'm using a single char for that (more characters would then mean removing others from the cardsection text or title, but it's not 1-for-1 i.e. a summary of '00' won't work if a "bare text message" is sent w\ 20826 characters
With a title that was the count of characters sent, the limit is 20,811 chars
W\o a title the limit bumps up to 20,827

So 20k+ characters is enough to hit a limit, but probably worth implementing the check as noted previously instead of trying to check for a specific hard-coded message size limit.