using FastJSON;
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Net;
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using System.Net.NetworkInformation;
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using System.Net.Sockets;
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using System.Security.Cryptography;
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using System.Text;
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using Top.Api.Parser;
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namespace Top.Api.Util
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{
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/// <summary>
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/// TOP系统工具类。
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/// </summary>
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public abstract class TopUtils
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{
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private static readonly JSONParameters jp = new JSONParameters();
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private static string intranetIp;
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static TopUtils()
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{
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jp.UseApiNamingStyle = true;
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jp.UseExtensions = false;
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jp.SerializeNullValues = false;
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}
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/// <summary>
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/// 给TOP请求签名。
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/// </summary>
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/// <param name="parameters">所有字符型的TOP请求参数</param>
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/// <param name="secret">签名密钥</param>
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/// <param name="signMethod">签名方法，可选值：md5, hmac</param>
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/// <returns>签名</returns>
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public static string SignTopRequest(IDictionary<string, string> parameters, string secret, string signMethod)
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{
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return SignTopRequest(parameters, null, secret, signMethod);
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}
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/// <summary>
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/// 给TOP请求签名。
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/// </summary>
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/// <param name="parameters">所有字符型的TOP请求参数</param>
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/// <param name="body">请求主体内容</param>
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/// <param name="secret">签名密钥</param>
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/// <param name="signMethod">签名方法，可选值：md5, hmac</param>
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/// <returns>签名</returns>
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public static string SignTopRequest(IDictionary<string, string> parameters, string body, string secret, string signMethod)
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{
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// 第一步：把字典按Key的字母顺序排序
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IDictionary<string, string> sortedParams = new SortedDictionary<string, string>(parameters, StringComparer.Ordinal);
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// 第二步：把所有参数名和参数值串在一起
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StringBuilder query = new StringBuilder();
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if (Constants.SIGN_METHOD_MD5.Equals(signMethod))
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{
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query.Append(secret);
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}
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foreach (KeyValuePair<string, string> kv in sortedParams)
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{
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if (!string.IsNullOrEmpty(kv.Key) && !string.IsNullOrEmpty(kv.Value))
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{
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query.Append(kv.Key).Append(kv.Value);
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}
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}
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// 第三步：把请求主体拼接在参数后面
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if (!string.IsNullOrEmpty(body))
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{
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query.Append(body);
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}
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// 第四步：使用MD5/HMAC加密
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byte[] bytes;
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if (Constants.SIGN_METHOD_HMAC.Equals(signMethod))
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{
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HMACMD5 hmac = new HMACMD5(Encoding.UTF8.GetBytes(secret));
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bytes = hmac.ComputeHash(Encoding.UTF8.GetBytes(query.ToString()));
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}
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else if (Constants.SIGN_METHOD_HMAC_SHA256.Equals(signMethod))
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{
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HMACSHA256 hmac = new HMACSHA256(Encoding.UTF8.GetBytes(secret));
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bytes = hmac.ComputeHash(Encoding.UTF8.GetBytes(query.ToString()));
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}
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else
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{
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query.Append(secret);
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MD5 md5 = MD5.Create();
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bytes = md5.ComputeHash(Encoding.UTF8.GetBytes(query.ToString()));
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}
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// 第五步：把二进制转化为大写的十六进制
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StringBuilder result = new StringBuilder();
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for (int i = 0; i < bytes.Length; i++)
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{
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result.Append(bytes[i].ToString("X2"));
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}
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return result.ToString();
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}
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/// <summary>
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/// 清除字典中值为空的项。
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/// </summary>
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/// <param name="dict">待清除的字典</param>
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/// <returns>清除后的字典</returns>
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public static IDictionary<string, T> CleanupDictionary<T>(IDictionary<string, T> dict)
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{
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IDictionary<string, T> newDict = new Dictionary<string, T>(dict.Count);
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foreach (KeyValuePair<string, T> kv in dict)
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{
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if (kv.Value != null)
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{
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newDict.Add(kv.Key, kv.Value);
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}
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}
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return newDict;
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}
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/// <summary>
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/// 把对象转换为JSON字符串。
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/// </summary>
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public static string ObjectToJson(object obj)
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{
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return JSON.ToJSON(obj, jp);
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}
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/// <summary>
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/// 把对象转换为JSON字符串。
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/// </summary>
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public static string ObjectToJson(object obj, JSONParameters newjp)
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{
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return JSON.ToJSON(obj, newjp);
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}
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/// <summary>
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/// 把JSON字符串转换为对象。
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/// </summary>
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public static object JsonToObject(string json)
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{
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return JSON.Parse(json);
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}
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/// <summary>
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/// 把JSON解释为API响应对象。
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/// </summary>
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/// <typeparam name="T">API响应类型</typeparam>
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/// <param name="json">JSON字符串</param>
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/// <returns>API响应对象</returns>
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public static T ParseResponse<T>(string json) where T : TopResponse
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{
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TopJsonParser<T> parser = new TopJsonParser<T>();
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return parser.Parse(json);
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}
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/// <summary>
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/// 获取从1970年1月1日到现在的毫秒总数。
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/// </summary>
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/// <returns>毫秒数</returns>
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public static long GetCurrentTimeMillis()
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{
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return (long)DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1)).TotalMilliseconds;
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}
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/// <summary>
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/// 获取本机的局域网IP。
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/// </summary>
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public static string GetIntranetIp()
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{
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if (intranetIp == null)
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{
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NetworkInterface[] nis = NetworkInterface.GetAllNetworkInterfaces();
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foreach (NetworkInterface ni in nis)
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{
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if (OperationalStatus.Up == ni.OperationalStatus && (NetworkInterfaceType.Ethernet == ni.NetworkInterfaceType || NetworkInterfaceType.Wireless80211 == ni.NetworkInterfaceType))
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{
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foreach (UnicastIPAddressInformation info in ni.GetIPProperties().UnicastAddresses)
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{
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if (AddressFamily.InterNetwork == info.Address.AddressFamily)
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{
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intranetIp = info.Address.ToString();
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break;
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}
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}
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if (intranetIp != null) break;
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}
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}
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}
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if (intranetIp == null)
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{
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intranetIp = "127.0.0.1";
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}
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return intranetIp;
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}
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}
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}
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