curl with Host header

Sometimes, it is handy to be able to test a web server running locally which is configured to serve different contents (or backends/upstream) based on the HTTP Host header in the request.

For HTTP, you could

curl -v -H 'Host: www.site1.com' localhost

But the above will not work for HTTPS even when you specify https because the webserver will insist on using localhost to match the SSL/TLS certificate. Instead, you need to:

curl -v --resolve 'www.site1.com:443:127.0.0.1' https://www.site1.com/