Posting Slack Messages about channelsurf

[tamhinsf]

Some endpoints in the MS Graph API will insert a retry-after value in the response header when returning a 429 code. Teams isn't indicated as being one of them, but docs have been known to be wrong.

https://developer.microsoft.com/en-us/graph/docs/concepts/throttling

Batching may not necessarily make things better: it depends how the Teams API that sits underneath the Graph is counting API calls.

[argvMatey]

Yeah, I saw that page as well, and I can confirm that there's no retry-after value in the response header. Since batching the requests doesn't result in more messages being posted, I'm assuming there's a hard limit in the Teams API on the number of posts per hour. Throttling seems to reset after an hour.

Also, this bit of code will return a new token after the original expires. Right now i am just returning the new token from postMessage, so it will only allow you to upload a single channel because the new token never makes it back to the GetAndUploadMessages loop at the top of Messages.cs, but because we are making a new team for each channel, it works well enough for our purposes. Sorry for linearizing your beautifully object oriented program!

if (j["error"]["code"].ToString() == "InvalidAuthenticationToken")
{
// need to re-authenticate when token expires - made authenticationcontext public static
//this piece is successfully re-authenticating
//new access token is returned from method
string newToken = Program.authenticationContext.AcquireTokenSilentAsync(Program.aadResourceAppId, Program.Configuration["AzureAd:ClientId"]).Result.AccessToken;

                Helpers.httpClient.DefaultRequestHeaders.Clear();
                Helpers.httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", newToken);
                Helpers.httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

[haraldreingruber]

@argvMatey Thanks for sharing your improvements. Do you still have the code? Could you share it as a Pull-Request? I guess it would increase the chance somebody building on the progress you have made.

[iradzik]

is that code posted anywhere i am running into issues when i try and run it

[dschief001]

@tamhinsf is there any new development into this direction going on, would be great, to fix this issue?
and make the result... way more "pretty"

[JustinWalker72]

We can import chats from slack to teams for more information you may want to take a look at this Slack to Teams migration guide.
https://www.cloudfuze.com/slack-to-teams-migration-guide-for-it-admins/