SharePointSSOTokenExchangeMiddleware Class
Definition
Important
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If the activity name is cardExtension/token, this middleware will attempt to exchange the token, and deduplicate the incoming call, ensuring only one exchange request is processed.
public class SharePointSSOTokenExchangeMiddlewaretype SharePointSSOTokenExchangeMiddleware = classPublic Class SharePointSSOTokenExchangeMiddleware- Inheritance
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SharePointSSOTokenExchangeMiddleware
Remarks
If a user is signed into multiple devices, 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
| SharePointSSOTokenExchangeMiddleware(IStorage, String) |
Initializes a new instance of the SharePointSSOTokenExchangeMiddleware class. |
Methods
| OnTurnAsync(ITurnContext, CancellationToken) |
Handles a turn. |