custom favicon support

Config.go

@@ -6,10 +6,11 @@ type Config struct {
 	}
 
 	Web struct {
-		Port   int    `json:"port"`
-		BindTo string `json:"bind_to"`
-		Extern string `json:"extern"`
-		Title  string `json:"title"`
+		Port          int    `json:"port"`
+		BindTo        string `json:"bind_to"`
+		Extern        string `json:"extern"`
+		Title         string `json:"title"`
+		CustomFavicon bool   `json:"custom_favicon"`
 
 		ExternalWebroot bool `json:"external_webroot,omitempty"`
 	}

main.go

@@ -181,6 +181,10 @@ func (this *App) SocketIOServer(so socketio.Socket) {
 
 }
 
+func (this *App) customFaviconHandler(w http.ResponseWriter, r *http.Request) {
+	http.ServeFile(w, r, "favicon.ico")
+}
+
 func (this *App) ConfigRequestHandler(w http.ResponseWriter, r *http.Request) {
 
 	confStruct := struct {
@@ -213,9 +217,9 @@ func (this *App) StaticRequestHandler(w http.ResponseWriter, r *http.Request) {
 
 	knownContentTypes := map[string]string{
 		".htm": "text/html",
-		".css": "text/css",
-		".js":  "application/javascript",
 		".png": "image/png",
+		".ico": "image/x-icon",
+		// No CSS/JS since they're embedded in the HTML
 	}
 
 	foundMime := false
@@ -251,6 +255,10 @@ func (this *App) RunServer() {
 	// Configuration handler
 	http.HandleFunc("/conf", this.ConfigRequestHandler)
 
+	if this.cfg.Web.CustomFavicon {
+		http.HandleFunc("/favicon.ico", this.customFaviconHandler)
+	}
+
 	// Other files: asset handler
 	if this.cfg.Web.ExternalWebroot {
 		http.Handle("/", http.FileServer(http.Dir("client")))

nmdc-webfrontend.conf.SAMPLE

@@ -8,7 +8,8 @@
 		"port"   : 8082,
 		"bind_to": "127.0.0.1",
 		"extern" : "http://127.0.0.1:8082",
-		"title"  : "DCWebUI"
+		"title"  : "DCWebUI",
+		"custom_favicon": false
 	},
 	
 	"hub": {