Sometimes you want/have to send specific http(s) requests. You can do that easy with curl or just write the request yourself.

make a http request with nc

nc example.com 80
GET / HTTP/1.1
Host: example.com
# press enter

make a http request with telnet

telnet example.com 80
GET / HTTP/1.1
Host: example.com
# press enter

make https request with openssl

openssl s_client -connect example.com:443
GET / HTTP/1.1
Host: example.com
# press enter

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You can specify more headers if you want:

nc example.com 80
GET /foo.html HTTP/1.1
Host: example.com
Accept-Encoding: gzip
Accept: text/html
# press enter