eric-wang-1990 opened a new pull request, #3962:
URL: https://github.com/apache/arrow-adbc/pull/3962

   Add support for configurable certificate revocation checking to address 
connection failures in restricted network environments (AWS PrivateLink, 
corporate firewalls) where CRL/OCSP servers are unreachable.
   
   Changes:
   - Add revocation_mode parameter to HttpTlsOptions and StandardTlsOptions
   - Support three modes: online (default), offline, nocheck
   - Add ParseRevocationMode helper for case-insensitive parsing
   - Apply RevocationMode to X509Chain validation in ValidateCertificate
   - Add 40 comprehensive unit tests (20 for HTTP, 20 for Standard)
   - All tests passing (42/42)
   
   Parameters:
   - adbc.http_options.tls.revocation_mode
   - adbc.standard_options.tls.revocation_mode
   
   Values:
   - "online": Check via network (default, requires port 80 to CRL/OCSP)
   - "offline": Check using locally cached CRL only
   - "nocheck": Skip revocation checking (recommended for PrivateLink)
   
   Fixes connection timeouts when port 80 access to CRL servers 
(crl3.digicert.com, ocsp.digicert.com) is blocked.
   
   Provides feature parity with ODBC (CheckCertRevocation) and JDBC 
(checkCertificateRevocation) drivers.


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