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FME Client sending incorrect URL to Oauth2 Service (Keycloak) authenticator. Is this a bug?

  • 27 October 2022
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Hello Forum. I'm trying to help a colleague to setup an Oauth2 service (Tools->WebConnections->+->Oauth2Service) but we're struggling. We have the parameters from the data-owner, and the "Preview" window in the setup dialog presents an acceptable URL (see attached image), but when the connection is made to the server, the URL is malformed. The problem is that the URL received on the server is terminated (prior to the parameters) with ampersand thus:

 

  • /realms/fdir-dev/protocol/openid-connect/auth&redirect_uri=https://localhost/&client_id=yggdrasil-sa

 

 instead of question-mark as reported in the setup-dialog Preview (see image) The question-mark is required by the server and html convention. Has anyone had success with the OAuth2 server connector, who might be able to guide us, or is this simply a bug?

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Best answer by williamm 3 November 2022, 13:24

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The trick here, as we found out from a helpful reseller-support, is that one must provide the question-mark as part of the authorization url.  Either as terminator, or with an initial parameter, thus our re-formed URL looks like so:

https://.../realms/fdir-dev/protocol/openid-connect/auth?response_type=code

 

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