Use Gorilla middleware (refactoring)

middleware/basic_auth.go

@@ -0,0 +1,61 @@
+// 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 middleware
+
+import (
+	"context"
+	"net/http"
+
+	"github.com/miniflux/miniflux/logger"
+)
+
+// BasicAuth handles HTTP basic authentication.
+func (m *Middleware) BasicAuth(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("WWW-Authenticate", `Basic realm="Restricted"`)
+		errorResponse := `{"error_message": "Not Authorized"}`
+
+		username, password, authOK := r.BasicAuth()
+		if !authOK {
+			logger.Debug("[Middleware:BasicAuth] No authentication headers sent")
+			w.WriteHeader(http.StatusUnauthorized)
+			w.Write([]byte(errorResponse))
+			return
+		}
+
+		if err := m.store.CheckPassword(username, password); err != nil {
+			logger.Info("[Middleware:BasicAuth] Invalid username or password: %s", username)
+			w.WriteHeader(http.StatusUnauthorized)
+			w.Write([]byte(errorResponse))
+			return
+		}
+
+		user, err := m.store.UserByUsername(username)
+		if err != nil {
+			logger.Error("[Middleware:BasicAuth] %v", err)
+			w.WriteHeader(http.StatusInternalServerError)
+			w.Write([]byte(errorResponse))
+			return
+		}
+
+		if user == nil {
+			logger.Info("[Middleware:BasicAuth] User not found: %s", username)
+			w.WriteHeader(http.StatusUnauthorized)
+			w.Write([]byte(errorResponse))
+			return
+		}
+
+		logger.Info("[Middleware:BasicAuth] User authenticated: %s", username)
+		m.store.SetLastLogin(user.ID)
+
+		ctx := r.Context()
+		ctx = context.WithValue(ctx, UserIDContextKey, user.ID)
+		ctx = context.WithValue(ctx, UserTimezoneContextKey, user.Timezone)
+		ctx = context.WithValue(ctx, IsAdminUserContextKey, user.IsAdmin)
+		ctx = context.WithValue(ctx, IsAuthenticatedContextKey, true)
+
+		next.ServeHTTP(w, r.WithContext(ctx))
+	})
+}