Add OAuth2ClientInterceptor to handle client credentials flow#2969

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christiangoerdes wants to merge 10 commits into

oAuth2Client-interceptor

Commits on Jun 5, 2026

Add OAuth2ClientInterceptor to handle client credentials flow
christiangoerdes
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Implement access token caching in OAuth2ClientInterceptor to reduce redundant token requests
christiangoerdes
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Simplify error detail message in OAuth2ClientInterceptor for token retrieval failure
christiangoerdes
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Encode client credentials in OAuth2ClientInterceptor to ensure proper handling of special characters
christiangoerdes
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Add Javadocs for OAuth2ClientInterceptor configuration attributes and usage
christiangoerdes
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Refactor `OAuth2ClientInterceptor` for improved readability and token handling: extract `extractAccessToken()` method and simplify token request creation.
christiangoerdes
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Refactor OAuth2 token handling: replace manual query string construction with `URLParamUtil.createQueryStringOmitNullValues` for improved readability and reusability
christiangoerdes
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Refactor authorization header creation: centralize logic in `BasicAuthenticationUtil.createAuthorizationHeader` and replace redundant implementations across modules
christiangoerdes
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Call super.init() in OAuth2ClientInterceptor init method
christiangoerdes
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Add proxy authentication check in HttpClient before attaching credentials
christiangoerdes
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