﻿/*
 * Copyright 2014, 2015 Dominick Baier, Brock Allen
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using IdentityServer3.Core.Resources;
using Microsoft.Owin;
using System;
using System.Collections.Generic;
using System.Threading.Tasks;

namespace IdentityServer3.Core.Configuration.Hosting
{
    internal class RequireSslMiddleware
    {
        readonly Func<IDictionary<string, object>, Task> _next;

        public RequireSslMiddleware(Func<IDictionary<string, object>, Task> next)
        {
            _next = next;
        }

        public async Task Invoke(IDictionary<string, object> env)
        {
            var context = new OwinContext(env);

            if (context.Request.Uri.Scheme != Uri.UriSchemeHttps)
            {
                context.Response.StatusCode = 403;
                context.Response.ReasonPhrase = Messages.SslRequired;

                await context.Response.WriteAsync(context.Response.ReasonPhrase);

                return;
            }

            await _next(env);
        }
    }
}