websocket stub

go.mod

@@ -4,6 +4,7 @@ require (
 	github.com/disintegration/imaging v1.5.0
 	github.com/google/go-cmp v0.2.0 // indirect
 	github.com/google/pprof v0.0.0-20190109223431-e84dfd68c163 // indirect
+	github.com/gorilla/websocket v1.4.0
 	github.com/mattn/go-sqlite3 v1.10.0
 	github.com/mjibson/esc v0.1.0 // indirect
 	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 // indirect

go.sum

@@ -6,6 +6,8 @@ github.com/google/go-cmp v0.2.0 h1:+dTQ8DZQJz0Mb/HjFlkptS1FeQ4cWSnN941F8aEG4SQ=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/pprof v0.0.0-20190109223431-e84dfd68c163 h1:beB+Da4k9B1zmgag78k3k1Bx4L/fdWr5FwNa0f8RxmY=
 github.com/google/pprof v0.0.0-20190109223431-e84dfd68c163/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=
+github.com/gorilla/websocket v1.4.0 h1:WDFjx/TMzVgy9VdMMQi2K2Emtwi2QcUQsztZ/zLaH/Q=
+github.com/gorilla/websocket v1.4.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/mattn/go-sqlite3 v1.10.0 h1:jbhqpg7tQe4SupckyijYiy0mJJ/pRyHvXf7JdWK860o=
 github.com/mattn/go-sqlite3 v1.10.0/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=

web/serve.go

@@ -20,6 +20,7 @@ func Serve(ctx *app.App) {
 	mux.Handle("/", http.FileServer(vfs.FS(ctx.Config.Webdev)))
 	mux.Handle("/api/tile/", &Tiles{ctx: ctx})
 	mux.Handle("/api/config", &ConfigHandler{ctx: ctx})
+	mux.Handle("/api/ws", &WS{ctx: ctx})
 
 	if ctx.Config.WebApi.EnableMapblock {
 		mux.Handle("/api/mapblock/", &MapblockHandler{ctx: ctx})

web/ws.go

@@ -0,0 +1,38 @@
+package web
+
+import (
+	"mapserver/app"
+	"net/http"
+	"github.com/gorilla/websocket"
+	"fmt"
+)
+
+type WS struct {
+	ctx *app.App
+}
+
+var upgrader = websocket.Upgrader{
+	ReadBufferSize:  1024,
+	WriteBufferSize: 1024,
+}
+
+func (t *WS) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
+	conn, _ := upgrader.Upgrade(resp, req, nil)
+
+	for {
+			// Read message from browser
+			msgType, msg, err := conn.ReadMessage()
+			if err != nil {
+				return
+			}
+
+			// Print the message to the console
+			fmt.Printf("%s sent: %s\n", conn.RemoteAddr(), string(msg))
+
+			// Write message back to browser
+			if err = conn.WriteMessage(msgType, msg); err != nil {
+				return
+			}
+		}
+
+}