Parser for rfc7239 formatted Forwarded headers.
use rfc7239::parse;
// get the header value from your favorite http server library
let header_value = "for=192.0.2.60;proto=http;by=203.0.113.43,for=192.168.10.10";
for node_result in parse(header_value) {
let node = node_result?;
if let Some(forwarded_for) = node.forwarded_for {
println!("Forwarded by {}", forwarded_for)
}
}