Running a Client
Setting up a Proxied Connection
A client needs to be configured with the same URI template as the proxy. For more information on URI templates, see URI Templates.
t := uritemplate.MustNew("https://example.org:4443/masque?h={target_host}&p={target_port}")
cl := masque.Client{
Template: t,
}Client.DialAddr can then be used establish proxied connections to servers by hostname.
In this case, DNS resolution is handled by the proxy:
// dial a target with a hostname
conn, rsp, err := cl.DialAddr(ctx, "quic-go.net:443")Client.Dial can be used to establish proxied connections to servers by IP address:
conn, rsp, err := cl.Dial(ctx, <*net.UDPAddr>)The net.PacketConn returned from these methods is only non-nil if the proxy accepted the proxying request.
This is the case if the HTTP status code is in the 2xx range:
conn, rsp, err := cl.DialAddr(ctx, "quic-go.net:443")
// ... handle error ...
if rsp.StatusCode < 200 && rsp.StatusCode > 299 {
// proxying request rejected
// The response status code and body might contain more information.
return
}
// use conn to send and receive UDP datagrams to the target
Multiple UDP flows can be proxied over the same QUIC connection to the proxy by calling DialAddr and / or Dial multiple times on the same Client.