Single endpoint for web+ui (Issue #4). Migrated to modern protobuf+grpc.

internal/httpservers/webuiServer.go

@@ -0,0 +1,63 @@
+package httpservers
+
+import (
+	"encoding/json"
+	//	cors "github.com/jamesread/OliveTin/internal/cors"
+	log "github.com/sirupsen/logrus"
+	"net/http"
+	"os"
+
+	config "github.com/jamesread/OliveTin/internal/config"
+)
+
+type webUISettings struct {
+	Rest string
+}
+
+func findWebuiDir() string {
+	directoriesToSearch := []string{
+		"./webui",
+		"/var/www/olivetin/",
+	}
+
+	for _, dir := range directoriesToSearch {
+		if _, err := os.Stat(dir); !os.IsNotExist(err) {
+			log.Infof("Found the webui directory here: %v", dir)
+
+			return dir
+		}
+	}
+
+	log.Warnf("Did not find the webui directory, you will probably get 404 errors.")
+
+	return "./webui" // Should not exist
+}
+
+func startWebUIServer(cfg *config.Config) {
+	log.WithFields(log.Fields{
+		"address": cfg.ListenAddressWebUI,
+	}).Info("Starting WebUI server")
+
+	mux := http.NewServeMux()
+	mux.Handle("/", http.FileServer(http.Dir(findWebuiDir())))
+	mux.HandleFunc("/webUiSettings.json", func(w http.ResponseWriter, r *http.Request) {
+		restAddress := ""
+
+		if !cfg.UseSingleHTTPFrontend {
+			restAddress = cfg.ExternalRestAddress
+		}
+
+		jsonRet, _ := json.Marshal(webUISettings{
+			Rest: restAddress + "/api/",
+		})
+
+		w.Write([]byte(jsonRet))
+	})
+
+	srv := &http.Server{
+		Addr:    cfg.ListenAddressWebUI,
+		Handler: mux,
+	}
+
+	log.Fatal(srv.ListenAndServe())
+}