KJD/Store.Framework/HttpExtension/AppApiRequestBase.cs

using MAX.Core.Autofac;
using MAX.Core.Cryptography;
using MAX.Core.DependencyInjection;
using MAX.Core.Helpers;
using MAX.Core.Logger;
using Store.Client.Agent;
using Store.Framework;
using Store.Framework.Inerterfaces;
using Store.Framework.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;

namespace Store.Client.HttpExtension
{
	/// <summary>
	/// Store 基础 API 请求基类。
	/// 项目 API 可以继承该基类并重写 ServiceConfigKey，使用项目自己的服务配置。
	/// </summary>
	public class AppApiRequestBase
	{
		/// <summary>
		/// 日志。
		/// </summary>
		[Autowired]
		protected ILoggerFacade _logger => LazyServiceProvider.Instance.LazyGetService<ILoggerFacade>();
		protected IApiServerConfig _config => LazyServiceProvider.Instance.LazyGetService<IApiServerConfig>();
		protected ICurrentUser CurrentUser => LazyServiceProvider.Instance.LazyGetService<ICurrentUser>();

		/// <summary>
		/// 默认服务请求。
		/// </summary>
		protected HttpResult Post(string urlpath, string postdata = "")
		{
			return Request(BuildServiceUrl(urlpath), postdata);
		}

		/// <summary>
		/// 公共签名服务请求。
		/// </summary>
		protected HttpResult PostPublic(string urlpath, string postdata = "")
		{
			return Request(BuildServiceUrl(urlpath), postdata, isUserSign: false);
		}

		/// <summary>
		/// 拼多多服务请求。
		/// </summary>
		protected HttpResult PostPdd(string urlpath, string postdata = "")
		{
			return Request(BuildServiceUrl("bxx_" + urlpath), postdata);
		}

		/// <summary>
		/// 微信服务请求。
		/// </summary>
		protected HttpResult PostWx(string urlpath, string postdata = "")
		{
			return Request(BuildServiceUrl("wxxd_" + urlpath), postdata);
		}

		/// <summary>
		/// 微信图片服务请求。
		/// </summary>
		protected HttpResult PostWxImg(string urlpath, string postdata = "")
		{
			return Request(BuildServiceUrl("wxxd_" + urlpath), postdata);
		}

		/// <summary>
		/// 默认兼容服务请求。
		/// </summary>
		protected HttpResult PostDefault(string urlpath, string postdata = "")
		{
			return Request(BuildServiceUrl(urlpath), postdata);
		}

		/// <summary>
		/// 使用当前 Key 构建服务请求地址。
		/// </summary>
		protected string BuildServiceUrl(string urlPath)
		{
			return $"{_config.Host}/wxxd_{urlPath}?obj={Config.MainPath}/wxxd_{urlPath}";
		}

		/// <summary>
		/// 创建并执行服务端请求，默认使用当前用户签名。
		/// </summary>
		protected HttpResult Request(string url, string postdata = "", MethodType method = MethodType.Post, bool isUserSign = true)
		{
			HttpItem item = new HttpItem
			{
				URL = url,
				Method = method,
				Postdata = postdata ?? string.Empty
			};

			ApplySign(item, isUserSign);

			return Send(item);
		}

		/// <summary>
		/// 服务器请求。
		/// </summary>
		public HttpResult ServerRequest(HttpItem item)
		{
			if (item == null)
			{
				throw new ArgumentNullException(nameof(item));
			}

#if RELEASE
            item.WebProxy = null;
#endif
			ApplySign(item, false);

			return Send(item);
		}

		/// <summary>
		/// 执行底层 HTTP 请求。
		/// </summary>
		protected HttpResult Send(HttpItem item)
		{
			if (item == null)
			{
				throw new ArgumentNullException(nameof(item));
			}
			if (string.IsNullOrWhiteSpace(item.URL))
			{
				throw new ArgumentException("请求地址不能为空。", nameof(item));
			}

			if (!item.URL.StartsWith("http", StringComparison.OrdinalIgnoreCase))
			{
				item.URL = _config.Host + "/" + item.URL.TrimStart('/');
			}

			item.Encoding = Encoding.UTF8;
			HttpResult result = HttpHelper.Request(item);
			if (result.StatusCode == HttpStatusCode.OK && !string.IsNullOrEmpty(result.Html) && result.Html[0] == 65279)
			{
				result.Html = result.Html.Remove(0, 1);
			}

			return result;
		}

		/// <summary>
		/// 为请求添加公共签名或用户签名。
		/// </summary>
		private void ApplySign(HttpItem item, bool isUserSign)
		{
			string sign = isUserSign
				? GetUserSign("", "")
				: GetSign();

			SetSign(item, sign);
		}

		/// <summary>
		/// 获取公共签名。
		/// </summary>
		private static string GetSign()
		{
			long time = GetReviseUnix();
			string code = Encryption(time);
			return "time=" + time + "&code=" + code + "&NbCodeVersion=1";
		}

		/// <summary>
		/// 获取当前用户签名。
		/// </summary>
		private string GetUserSign(string shopId, string shopName)
		{
			UserInfo user = CurrentUser.User;
			if (user == null)
			{
				throw new InvalidOperationException("当前用户未登录，无法生成用户签名。");
			}

			long time = GetReviseUnix();
			string code = Encryption(time);
			var dict = new Dictionary<string, string>
			{
				{ "time", time.ToString() },
				{ "code", code },
				{ "code_version", "1" },
				{ "version", Config.Version },
				{ "user_name", user.UserName },
				{ "path", Config.MainPath }
			};
			if (!string.IsNullOrEmpty(AgentConfig.AgentCode))
			{
				dict.Add("agent_code", AgentConfig.AgentCode);
				dict.Add("agent_name", AgentConfig.AgentName);
			}

			return string.Join("&", dict.Select(kv => $"{kv.Key}={kv.Value}"));
		}

		/// <summary>
		/// 获取校正后的时间戳。
		/// </summary>
		protected static long GetReviseUnix()
		{
			return DateHelper.GetCurrentUnixTimestampInSeconds() + ServerConfig.TimeDifferent;
		}

		/// <summary>
		/// 签名算法。
		/// </summary>
		/// <param name="s">随机数</param>
		/// <returns>加密签名结果</returns>
		protected static string Encryption(long s)
		{
			string value = $"{s}sdhewu*/fhAAue48485ew5+5%@3485esGFFHFD";
			return MD5Helper.Md5_32(value);
		}

		/// <summary>
		/// 将签名参数拼接到请求。
		/// </summary>
		private static void SetSign(HttpItem item, string sign)
		{
			if (item.Method == MethodType.Get)
			{
				item.URL += item.URL.Contains("?") ? "&" : "?";
				item.URL += sign;
			}
			else
			{
				item.Postdata = item.Postdata ?? string.Empty;
				if (item.Postdata.Length > 0)
				{
					item.Postdata += "&";
				}
				item.Postdata += sign;
			}
		}
	}
}