Added optional TLS bypass mechanism

+ Added opt-out for subdomains for global TLS settings #44
+ Optimized subdomain / vdir editing interface

src/mod/dynamicproxy/dynamicproxy.go

@@ -60,6 +60,12 @@ func (router *Router) UpdateTLSVersion(requireLatest bool) {
 	router.Restart()
 }
 
+// Update port 80 listener state
+func (router *Router) UpdatePort80ListenerState(useRedirect bool) {
+	router.Option.ListenOnPort80 = useRedirect
+	router.Restart()
+}
+
 // Update https redirect, which will require updates
 func (router *Router) UpdateHttpToHttpsRedirectSetting(useRedirect bool) {
 	router.Option.ForceHttpsRedirect = useRedirect
@@ -112,16 +118,56 @@ func (router *Router) StartProxyService() error {
 		}
 		router.Running = true
 
-		if router.Option.Port != 80 && router.Option.ForceHttpsRedirect {
+		if router.Option.Port != 80 && router.Option.ListenOnPort80 {
 			//Add a 80 to 443 redirector
 			httpServer := &http.Server{
 				Addr: ":80",
 				Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-					protocol := "https://"
-					if router.Option.Port == 443 {
-						http.Redirect(w, r, protocol+r.Host+r.RequestURI, http.StatusTemporaryRedirect)
+					//Check if the domain requesting allow non TLS mode
+					domainOnly := r.Host
+					if strings.Contains(r.Host, ":") {
+						hostPath := strings.Split(r.Host, ":")
+						domainOnly = hostPath[0]
+					}
+					sep := router.getSubdomainProxyEndpointFromHostname(domainOnly)
+					if sep != nil && sep.BypassGlobalTLS {
+						//Allow routing via non-TLS handler
+						originalHostHeader := r.Host
+						if r.URL != nil {
+							r.Host = r.URL.Host
+						} else {
+							//Fallback when the upstream proxy screw something up in the header
+							r.URL, _ = url.Parse(originalHostHeader)
+						}
+
+						sep.Proxy.ServeHTTP(w, r, &dpcore.ResponseRewriteRuleSet{
+							ProxyDomain:  sep.Domain,
+							OriginalHost: originalHostHeader,
+							UseTLS:       sep.RequireTLS,
+							PathPrefix:   "",
+						})
+						return
+					}
+
+					if router.Option.ForceHttpsRedirect {
+						//Redirect to https is enabled
+						protocol := "https://"
+						if router.Option.Port == 443 {
+							http.Redirect(w, r, protocol+r.Host+r.RequestURI, http.StatusTemporaryRedirect)
+						} else {
+							http.Redirect(w, r, protocol+r.Host+":"+strconv.Itoa(router.Option.Port)+r.RequestURI, http.StatusTemporaryRedirect)
+						}
 					} else {
-						http.Redirect(w, r, protocol+r.Host+":"+strconv.Itoa(router.Option.Port)+r.RequestURI, http.StatusTemporaryRedirect)
+						//Do not do redirection
+						if sep != nil {
+							//Sub-domain exists but not allow non-TLS access
+							w.WriteHeader(http.StatusBadRequest)
+							w.Write([]byte("400 - Bad Request"))
+						} else {
+							//No defined sub-domain
+							http.NotFound(w, r)
+						}
+
 					}
 
 				}),

src/mod/dynamicproxy/typedef.go

@@ -27,6 +27,7 @@ type RouterOption struct {
 	Port               int    //Incoming port
 	UseTls             bool   //Use TLS to serve incoming requsts
 	ForceTLSLatest     bool   //Force TLS1.2 or above
+	ListenOnPort80     bool   //Enable port 80 http listener
 	ForceHttpsRedirect bool   //Force redirection of http to https endpoint
 	TlsManager         *tlscert.Manager
 	RedirectRuleTable  *redirection.RuleTable