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Topic starter
As Airtable is phasing out their API keys, I've been attempting to configure new Airtable OAuth2 credentials. Upon trying to establish a connection, the credential callback returned the following error:
{
"error": "invalid_request",
"error_description": "The "code_verifier" must only contain characters that are in: [A-Z] / [a-z] / [0-9] / "-" / "." / "_""
}
I noticed that PKCE support was introduced earlier this summer (feat(core): Add PKCE for OAuth2 by agobrech · Pull Request #6324 · n8n-io/n8n · GitHub), and I suspect this error indicates a necessary adjustment for the Airtable Auth2 credentials to be successfully created.
- callin.io version: 1.4.1
Posted : 30/08/2023 6:39 pm
Hi, I'm very sorry you’re experiencing difficulties.
I was able to reproduce this, but this error only occurred sporadically, with about 2 out of 3 attempts succeeding. Therefore, I suspect this is simply a situation where Airtable is rejecting a character (typically supported by other services implementing OAuth2) in the codeverifier field. Retrying the connection should generate a new codeverifier.
Could you please try this again on your end and let me know if the problem also resolves for you upon retrying?
Posted : 31/08/2023 10:42 am
Topic starter
Interesting. I attempted a few more times, and it succeeded on the fourth try.
I suspect the core reason for this problem lies with pkce-challenge@3.0.0.patch, which eliminated the ~ character to resolve a Twitter-specific issue. You can find related discussion in PR #6324.
Posted : 31/08/2023 3:10 pm
Hello,
We've also encountered this issue and plan to address it shortly.
Posted : 31/08/2023 3:29 pm
I'm encountering the same problem.
I attempted to run a workflow and discovered that the Airtable authentication was failing. I generated new OAuth credentials, and while I can connect on the credentials screen, the nodes are prompting me to verify my credentials.
Posted : 11/09/2023 7:23 am
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Posted : 10/12/2023 7:23 am