Reverse Proxy Cheatsheet as a Request-Response Sequence Diagram

Trying to understand what headers and bodies the requests and responses between client, reverse proxy and backend actually contain.

Getting Host, Port and Scheme right

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Getting Subpaths right

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Useful cURL Commands

Setting the Host header and being verbose:

curl -vH "Host: example.com" http://localhost/

To also test HTTPS (using SNI) – an alternative to a local /etc/hosts entry:

curl -v --resolve example.com:443:127.0.0.1 https://example.com