* Externalized config

* Add dynamic user/share handling

main.go

@@ -27,27 +27,39 @@ package main
 
 import (
 	"context"
+	"flag"
 	"golang.org/x/net/webdav"
-	"log"
 	"net/http"
 )
 
+var configFile = flag.String("config", "sharedav.toml", "Config file to be used.")
+
 func main() {
+	flag.Parse()
+
+	c := LoadConfig(*configFile)
+
 	h := &webdav.Handler{}
 	h.LockSystem = webdav.NewMemLS()
-	h.FileSystem = BaseDir("")
+	h.FileSystem = BaseDir(c.BaseDirectory)
 
 	authenticatedWebdavHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		username, password, ok := r.BasicAuth()
-		if !ok || (username != "user1" && username != "user2") || password != "test" {
-			log.Println("invalid user pass", ok, username, password)
+		directory := ""
+		if ok {
+			ok, directory = c.ValidateDAVUser(username, password)
+		}
+		if !ok {
 			w.Header().Set("WWW-Authenticate", `Basic realm="ShareDAV"`)
 			http.Error(w, "unauthorized", http.StatusUnauthorized)
 			return
 		}
 
-		h.ServeHTTP(w, r.WithContext(context.WithValue(r.Context(), "dir", username)))
+		// Use the WebDAV handler to actually serve the request. Also enhance the context
+		// to contain the subdirectory (of the base directory) which contains the data for
+		// the authenticated user.
+		h.ServeHTTP(w, r.WithContext(context.WithValue(r.Context(), "dir", directory)))
 	})
 
-	http.ListenAndServe(":3000", authenticatedWebdavHandler)
+	http.ListenAndServe(c.ListenAddress, authenticatedWebdavHandler)
 }