v.21.1Improvements

Set Content-Type in HTTP Packets from URL Engine

Set Content-Type in HTTP packets issued from URL engine. #32113 (Frank Chen).
Adds the ability to set the Content-Type header in HTTP requests made by the URL engine in ClickHouse.

Why it matters

This feature addresses the need to specify the Content-Type in HTTP packets when ClickHouse uses the URL table engine, allowing better interaction with HTTP services that require specific content types for request payloads.

How to use it

Users can specify the Content-Type header directly in the URL table engine query settings when making HTTP requests through the URL engine.