Use vanilla HTTP handlers (refactoring)

ui/static_app_icon.go

@@ -0,0 +1,37 @@
+// Copyright 2018 Frédéric Guillot. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package ui
+
+import (
+	"encoding/base64"
+	"net/http"
+	"time"
+
+	"github.com/miniflux/miniflux/http/request"
+	"github.com/miniflux/miniflux/http/response"
+	"github.com/miniflux/miniflux/http/response/html"
+	"github.com/miniflux/miniflux/logger"
+	"github.com/miniflux/miniflux/ui/static"
+)
+
+// AppIcon renders application icons.
+func (c *Controller) AppIcon(w http.ResponseWriter, r *http.Request) {
+	filename := request.Param(r, "filename", "favicon.png")
+	encodedBlob, found := static.Binaries[filename]
+	if !found {
+		logger.Info("[Controller:AppIcon] This icon doesn't exists: %s", filename)
+		html.NotFound(w)
+		return
+	}
+
+	blob, err := base64.StdEncoding.DecodeString(encodedBlob)
+	if err != nil {
+		logger.Error("[Controller:AppIcon] %v", err)
+		html.NotFound(w)
+		return
+	}
+
+	response.Cache(w, r, "image/png", static.BinariesChecksums[filename], blob, 48*time.Hour)
+}