Simplify application HTTP middlewares

service/httpd/middleware.go

@@ -0,0 +1,47 @@
+// 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 httpd // import "miniflux.app/service/httpd"
+
+import (
+	"context"
+	"net/http"
+
+	"miniflux.app/config"
+	"miniflux.app/http/request"
+	"miniflux.app/logger"
+)
+
+type middleware struct {
+	cfg *config.Config
+}
+
+func newMiddleware(cfg *config.Config) *middleware {
+	return &middleware{cfg}
+}
+
+func (m *middleware) Serve(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		clientIP := request.FindClientIP(r)
+		ctx := r.Context()
+		ctx = context.WithValue(ctx, request.ClientIPContextKey, clientIP)
+
+		if r.Header.Get("X-Forwarded-Proto") == "https" {
+			m.cfg.IsHTTPS = true
+		}
+
+		protocol := "HTTP"
+		if m.cfg.IsHTTPS {
+			protocol = "HTTPS"
+		}
+
+		logger.Debug("[%s] %s %s %s", protocol, clientIP, r.Method, r.RequestURI)
+
+		if m.cfg.IsHTTPS && m.cfg.HasHSTS() {
+			w.Header().Set("Strict-Transport-Security", "max-age=31536000")
+		}
+
+		next.ServeHTTP(w, r.WithContext(ctx))
+	})
+}