fix: issue with refreshing token when client_secret is not set #513
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anna-romanova
changed the title
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Hi @jpoehnelt 👋, Just a friendly ping — we’re encountering an issue with refreshing the token when using PKCE without setting a client secret. Resolving this in the OAuth2 for Apps Script would be the best solution for us, and I was wondering if you might have some time to look into the proposed changes in this PR. Any feedback or thoughts would be greatly appreciated! Thanks so much for your time and help. |
jpoehnelt
approved these changes
Feb 27, 2025
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Fix for #506
Problem: The support for PKCE (Proof Key for Code Exchange) was introduced in the library, making the
client_secretfield optional (see commit e6afdfb). However, theclient_secretfield is still included in the list of validated fields in therefresh()method (Service.js#L667).Issue: When creating a client without setting a
client_secret(using PKCE for authentication), the token cannot be refreshed after its default expiration of one hour. This is because the validation check in therefresh()method expects aclient_secret, causing an error in the PKCE flow.Proposed Fix: Adjust the validation logic in the
refresh()method to account for the possibility that theclient_secretis not provided when using PKCE. This ensures that the token can still be refreshed in the absence of aclient_secret.