HTTP Rule

There are two HTTP rule types. HTTP rule is for HTTP requests or HTTPS requests. It won't affect TCP connections.

USER-AGENT

USER-AGENT,Instagram*,DIRECT

Rule matches if the user agent of the request matches. Wildcard characters * and ? are supported.

URL-REGEX

URL-REGEX,^http://google\.com,DIRECT

Rule matches if the URL matches the regular expression.

You can append the extended-matching parameter to also test the HTTP Host header (or :authority) and SNI, which helps when TLS handshake information is needed:

URL-REGEX,^https://example\.com,Proxy,extended-matching