How to get full text of request (not response) headers?

I have to ensure that curl is sending cookies propertly, so I shoul开发者_如何学God view full text of request (not response!) http headers. Is there any way to do it?

Thank you

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Obviously, you need to intercept the request headers at some point. Considering you want to see headers from curl, I would suggest setting up a transparent proxy. For a relatively simpler solution, I would suggest a tool such as WireShark.