From e92f817edbf814cb332f79eda3322c0120291482 Mon Sep 17 00:00:00 2001
From: Lukas <lukas@leucali.net>
Date: Fri, 18 Nov 2022 21:37:29 +0100
Subject: [PATCH] Added Basic Landing Page & Redirect

---
 internal/httputil/paths.go |  1 +
 setup/base/base.go         | 16 ++++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/internal/httputil/paths.go b/internal/httputil/paths.go
index 12cf59eb4..62eff0415 100644
--- a/internal/httputil/paths.go
+++ b/internal/httputil/paths.go
@@ -19,6 +19,7 @@ const (
 	PublicFederationPathPrefix = "/_matrix/federation/"
 	PublicKeyPathPrefix        = "/_matrix/key/"
 	PublicMediaPathPrefix      = "/_matrix/media/"
+	PublicStaticPath           = "/_matrix/static/"
 	PublicWellKnownPrefix      = "/.well-known/matrix/"
 	InternalPathPrefix         = "/api/"
 	DendriteAdminPathPrefix    = "/_dendrite/"
diff --git a/setup/base/base.go b/setup/base/base.go
index 14edadd96..9a158d9b7 100644
--- a/setup/base/base.go
+++ b/setup/base/base.go
@@ -79,6 +79,7 @@ type BaseDendrite struct {
 	PublicKeyAPIMux        *mux.Router
 	PublicMediaAPIMux      *mux.Router
 	PublicWellKnownAPIMux  *mux.Router
+	PublicStaticMux        *mux.Router
 	InternalAPIMux         *mux.Router
 	DendriteAdminMux       *mux.Router
 	SynapseAdminMux        *mux.Router
@@ -250,6 +251,7 @@ func NewBaseDendrite(cfg *config.Dendrite, componentName string, options ...Base
 		PublicKeyAPIMux:        mux.NewRouter().SkipClean(true).PathPrefix(httputil.PublicKeyPathPrefix).Subrouter().UseEncodedPath(),
 		PublicMediaAPIMux:      mux.NewRouter().SkipClean(true).PathPrefix(httputil.PublicMediaPathPrefix).Subrouter().UseEncodedPath(),
 		PublicWellKnownAPIMux:  mux.NewRouter().SkipClean(true).PathPrefix(httputil.PublicWellKnownPrefix).Subrouter().UseEncodedPath(),
+		PublicStaticMux:        mux.NewRouter().SkipClean(true).PathPrefix(httputil.PublicStaticPath).Subrouter().UseEncodedPath(),
 		InternalAPIMux:         mux.NewRouter().SkipClean(true).PathPrefix(httputil.InternalPathPrefix).Subrouter().UseEncodedPath(),
 		DendriteAdminMux:       mux.NewRouter().SkipClean(true).PathPrefix(httputil.DendriteAdminPathPrefix).Subrouter().UseEncodedPath(),
 		SynapseAdminMux:        mux.NewRouter().SkipClean(true).PathPrefix(httputil.SynapseAdminPathPrefix).Subrouter().UseEncodedPath(),
@@ -403,6 +405,7 @@ func (b *BaseDendrite) configureHTTPErrors() {
 	for _, router := range []*mux.Router{
 		b.PublicMediaAPIMux, b.DendriteAdminMux,
 		b.SynapseAdminMux, b.PublicWellKnownAPIMux,
+		b.PublicStaticMux,
 	} {
 		router.NotFoundHandler = notFoundCORSHandler
 		router.MethodNotAllowedHandler = notAllowedCORSHandler
@@ -458,14 +461,26 @@ func (b *BaseDendrite) SetupAndServeHTTP(
 
 	b.configureHTTPErrors()
 
+	//Redirect for Landing Page
+	externalRouter.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		http.Redirect(w, r, httputil.PublicStaticPath, http.StatusSeeOther)
+	})
+
 	internalRouter.PathPrefix(httputil.InternalPathPrefix).Handler(b.InternalAPIMux)
 	if b.Cfg.Global.Metrics.Enabled {
 		internalRouter.Handle("/metrics", httputil.WrapHandlerInBasicAuth(promhttp.Handler(), b.Cfg.Global.Metrics.BasicAuth))
 	}
 
+	b.PublicStaticMux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(200)
+		w.Header().Set("Content-Type", "application/json")
+		_, _ = w.Write([]byte(`{"message":"hello world"}`))
+	})
+
 	b.DendriteAdminMux.HandleFunc("/monitor/up", func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(200)
 	})
+
 	b.DendriteAdminMux.HandleFunc("/monitor/health", func(w http.ResponseWriter, r *http.Request) {
 		if isDegraded, reasons := b.ProcessContext.IsDegraded(); isDegraded {
 			w.WriteHeader(503)
@@ -504,6 +519,7 @@ func (b *BaseDendrite) SetupAndServeHTTP(
 	externalRouter.PathPrefix(httputil.SynapseAdminPathPrefix).Handler(b.SynapseAdminMux)
 	externalRouter.PathPrefix(httputil.PublicMediaPathPrefix).Handler(b.PublicMediaAPIMux)
 	externalRouter.PathPrefix(httputil.PublicWellKnownPrefix).Handler(b.PublicWellKnownAPIMux)
+	externalRouter.PathPrefix(httputil.PublicStaticPath).Handler(b.PublicStaticMux)
 
 	b.startupLock.Unlock()
 	if internalAddr != NoListener && internalAddr != externalAddr {