Worked on stabilizing HTTP transport behavior in the ClickHouse/clickhouse-go repository, focusing on backend and API development using Go. Addressed a critical issue with Host header handling by ensuring that the Host header specified in HTTP options reliably overrides the req.Host field. Implemented case-insensitive matching for the Host header and prevented duplication by routing the value directly to req.Host rather than req.Header. This approach improved the consistency and reliability of HTTP requests, eliminating previous inconsistencies in Host values. Emphasized thorough testing throughout the process, resulting in more predictable and robust HTTP interactions for ClickHouse-go users and downstream systems.