TeamsSSOTokenExchangeMiddleware Class
Definition
Important
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If the activity name is signin/tokenExchange, this middleware will attempt to exchange the token, and deduplicate the incoming call, ensuring only one exchange request is processed.
public class TeamsSSOTokenExchangeMiddleware : Microsoft.Bot.Builder.IMiddlewaretype TeamsSSOTokenExchangeMiddleware = class
interface IMiddlewarePublic Class TeamsSSOTokenExchangeMiddleware
Implements IMiddleware- Inheritance
-
TeamsSSOTokenExchangeMiddleware
- Implements
Remarks
If a user is signed into multiple Teams clients, the Bot could receive a "signin/tokenExchange" from each client. Each token exchange request for a specific user login will have an identical Activity.Value.Id.
Only one of these token exchange requests should be processed by the bot. The others return PreconditionFailed. For a distributed bot in production, this requires a distributed storage ensuring only one token exchange is processed. This middleware supports CosmosDb storage found in Microsoft.Bot.Builder.Azure, or MemoryStorage for local development. IStorage's ETag implementation for token exchange activity deduplication.
Constructors
| TeamsSSOTokenExchangeMiddleware(IStorage, String) |
Initializes a new instance of the TeamsSSOTokenExchangeMiddleware class. |
Methods
| OnTurnAsync(ITurnContext, NextDelegate, CancellationToken) |
When implemented in middleware, processes an incoming activity. |