Add routing for basic web ui

server/fileserver.go

@@ -0,0 +1,47 @@
+package server
+
+import (
+	"net/http"
+	"os"
+	"strings"
+
+	"github.com/go-chi/chi"
+)
+
+func FileServer(r chi.Router, fullPath, subPath string, root http.FileSystem) {
+	if strings.ContainsAny(fullPath, "{}*") {
+		panic("FileServer does not permit URL parameters.")
+	}
+
+	fs := http.StripPrefix(fullPath, http.FileServer(justFilesFilesystem{root}))
+
+	if subPath != "/" && subPath[len(subPath)-1] != '/' {
+		r.Get(subPath, http.RedirectHandler(fullPath+"/", 302).ServeHTTP)
+		subPath += "/"
+	}
+	subPath += "*"
+
+	r.Get(subPath, func(w http.ResponseWriter, r *http.Request) {
+		fs.ServeHTTP(w, r)
+	})
+}
+
+type justFilesFilesystem struct {
+	fs http.FileSystem
+}
+
+func (fs justFilesFilesystem) Open(name string) (http.File, error) {
+	f, err := fs.fs.Open(name)
+	if err != nil {
+		return nil, err
+	}
+	return neuteredReaddirFile{f}, nil
+}
+
+type neuteredReaddirFile struct {
+	http.File
+}
+
+func (f neuteredReaddirFile) Readdir(count int) ([]os.FileInfo, error) {
+	return nil, nil
+}