First commit

middleware/host.go

@@ -0,0 +1,22 @@
+package middleware
+
+import (
+	"net"
+	"strings"
+
+	"github.com/miekg/dns"
+)
+
+// Host represents a host from the Caddyfile, may contain port.
+type Host string
+
+// Standard host will return the host portion of host, stripping
+// of any port. The host will also be fully qualified and lowercased.
+func (h Host) StandardHost() string {
+	// separate host and port
+	host, _, err := net.SplitHostPort(string(h))
+	if err != nil {
+		host, _, _ = net.SplitHostPort(string(h) + ":")
+	}
+	return strings.ToLower(dns.Fqdn(host))
+}