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* fix: clear stale client registration on invalid_client during token refresh When a token refresh fails with `invalid_client`, the stored DCR client registration is no longer valid on the authorization server. The existing error handler only checked for `unauthorized_client` and returned null, leaving the stale client_id cached in the database permanently. Every subsequent token refresh attempt would fail with the same error. Now when `invalid_client` is detected during refresh: 1. The stale client registration is deleted from the database 2. A `ReauthenticationRequiredError` is thrown to trigger a fresh OAuth flow with new dynamic client registration Also passes `deleteTokens` from MCPConnectionFactory to getTokens() so the cleanup has access to the token deletion method. * fix: address review findings for stale client cleanup on token refresh - Delete stale refresh token alongside client registration on invalid_client (Finding 1) - Add tests for all new code paths: cleanup, warning, case-insensitivity, cleanup failure (Finding 2) - Detect all vendor-specific client rejection patterns (client_id mismatch, client not found, unknown client) with case-insensitive matching (Finding 3) - Use else-if for mutually exclusive error branches (Finding 4) - Log warning when deleteTokens is not available on client rejection (Finding 6) - Fix log message to say "attempting to clear" before async cleanup (Finding 7) - Extract isClientRejectionMessage to shared utility, refactor MCPConnectionFactory.isClientRejection to use it * fix: address followup review findings - Extract isInvalidClientMessage (4 stale-client patterns) from isClientRejectionMessage to eliminate pattern duplication between utils.ts and tokens.ts (Finding 1) - Remove redundant staleIdentifier variable, reuse identifier already in scope (Finding 2) - Separate await from .then() on Promise.allSettled for readability (Finding 3) - Add dedicated unit tests for isInvalidClientMessage and isClientRejectionMessage (Finding 4) - Assert error message content in primary invalid_client test (Finding 5) - Add JSDoc on deleteTokens in GetTokensParams (Finding 6) --------- Co-authored-by: Mani Japra <mani@muonspace.com> |
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