微信Jssdk 認證簽名

微信jssdk 認證簽名，微信官方建議在後臺獲取，而且要緩存獲取過程當中使用的access_token 和 jsapiticket，緣由是微信官方限制了天天獲取的次數（2000次），因此要在後臺緩存，

access_token 和 jsapiticket都是兩小時內有效，可根據本身的需求設定緩存的時間。

下面的代碼是認證簽名類

  1 using LitJson;
  2 using System;
  3 using System.Collections.Generic;
  4 using System.IO;
  5 using System.Net;
  6 using System.Security.Cryptography;
  7 using System.Text;
  8 using System.Web;
  9 
 10 namespace Components.Helper
 11 {
 12     public static class WxJsSdkHelper
 13     {
 14         private static string m_CacheKey_accesstoken = "wxapi/jssdk/accesstoken";
 15         private static string m_CacheKey_jsapiticket = "wxapi/jssdk/jsapiticket";
 16 
 17         #region Get請求的簡單封裝
 18 
 19         /// <summary>發起GET請求</summary>
 20         /// <param name="url">請求URL</param>
 21         /// <param name="errmsg">錯誤信息</param>
 22         /// <param name="parameters">請求參數</param>
 23         /// <returns></returns>
 24         public static string Get(string url, out string errmsg, Dictionary<string, object> parameters)
 25         {
 26             errmsg = null;
 27             var strUrl = new StringBuilder(url);
 28             if (parameters != null && parameters.Count > 0)
 29             {
 30                 //拼接參數
 31                 strUrl.Append("?");
 32                 foreach (KeyValuePair<string, object> keyValuePair in parameters)
 33                 {
 34                     strUrl.AppendFormat("{0}={1}&",keyValuePair.Key,keyValuePair.Value.ToString());
 35                 }
 36                 strUrl.Remove(strUrl.Length - 1, 1);//移除最後一位多出的「&」
 37             }
 38             var request = (HttpWebRequest)WebRequest.Create(strUrl.ToString());
 39             request.Method = "GET";
 40             request.Timeout = 10000;
 41             try
 42             {
 43                 var response = (HttpWebResponse)request.GetResponse();
 44                 using (Stream stream = response.GetResponseStream())
 45                 {
 46                     if (stream != null)
 47                     {
 48                         var reader = new StreamReader(stream);
 49                         return reader.ReadToEnd();
 50                     }
 51                 }
 52             }
 53             catch (Exception ex)
 54             {
 55                 errmsg = "請求異常：" + ex.Message;
 56             }
 57             return null;
 58         }
 59 
 60         #endregion
 61 
 62         #region SHA1加密算法
 63 
 64         /// <summary>
 65         /// SHA1加密算法
 66         /// </summary>
 67         /// <param name="str">要加密的字符串</param>
 68         /// <returns></returns>
 69         public static string GetSha1Str(string str)
 70         {
 71             byte[] strRes = Encoding.UTF8.GetBytes(str);
 72             HashAlgorithm iSha = new SHA1CryptoServiceProvider();
 73             strRes = iSha.ComputeHash(strRes);
 74             var enText = new StringBuilder();
 75             foreach (byte iByte in strRes)
 76             {
 77                 enText.AppendFormat("{0:x2}", iByte);
 78             }
 79             return enText.ToString();
 80         }
 81 
 82         #endregion
 83 
 84         #region 獲取access_token
 85         /// <summary>
 86         /// 獲取調用JS SDK時所需的access_token
 87         /// 文檔地址：http://mp.weixin.qq.com/wiki/15/54ce45d8d30b6bf6758f68d2e95bc627.html
 88         /// </summary>
 89         /// <returns></returns>
 90         public static string GetAccessToken(string appid,string appSecret)
 91         {
 92             //獲取access_token在2小時內有效，因爲1天內獲取次數有限制（2000次），所以緩存100分鐘
 93             string errmsg;
 94             string access_token = string.Empty;
 95             // 從緩存中獲取token
 96             //string temp = CacheHelper.GetCache(m_CacheKey_accesstoken).IString();
 97             string temp = MemcachHelper.Get(m_CacheKey_accesstoken).IString();
 98             //Functions.Write("緩存測試，當前緩存內容：token" + temp + ",時間：" + DateTime.Now.IString());
 99             if (!temp.IsEmpty())
100             {
101                 return access_token = temp;
102             }
103             else
104             {
105                 string apiUrl = string.Format("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={0}&secret={1}", appid, appSecret);
106                 string responseStr = Get(apiUrl, out errmsg, null);
107                 if (responseStr == null)
108                 {
109                     return errmsg;
110                 }
111                 else
112                 {
113                     JsonData jd = JsonMapper.ToObject(responseStr);
114                     access_token = (string)jd["access_token"];
115                     if (!access_token.IsEmpty())
116                     {
117                         //CacheHelper.AddCache(m_CacheKey_accesstoken, access_token, 1);
118                         DateTime m_expiryTime = DateTime.Now.AddMilliseconds(60000);
119                         MemcachHelper.Add(m_CacheKey_accesstoken, access_token, m_expiryTime);
120                         //Functions.Write("緩存測試，添加緩存操做，內容：token" + access_token + ",時間：" + DateTime.Now.IString());
121                         return access_token;
122                     }
123                     else
124                     {
125                         return errmsg = "取得access_token失敗";
126                     }
127                 }
128             }
129         }
130         #endregion
131 
132         #region 獲取調用JS SDK時所需的票據
133         /// <summary>
134         /// 獲取調用JS SDK時所需的票據
135         /// 文檔地址：http://mp.weixin.qq.com/wiki/7/aaa137b55fb2e0456bf8dd9148dd613f.html#.E9.99.84.E5.BD.951-JS-SDK.E4.BD.BF.E7.94.A8.E6.9D.83.E9.99.90.E7.AD.BE.E5.90.8D.E7.AE.97.E6.B3.95
136         /// </summary>
137         /// <returns></returns>
138         public static string GetJsApiTicket(string appid, string appSecret)
139         {
140             //獲取的ticket在2小時內有效，因爲1天內獲取次數有限制（2000次），所以緩存100分鐘
141             string errmsg;
142             string jsapiticket = string.Empty;
143             // 從緩存中獲取ticket
144             //string temp = CacheHelper.GetCache(m_CacheKey_jsapiticket).IString();
145             string temp = MemcachHelper.Get(m_CacheKey_jsapiticket).IString();
146             //Functions.Write("緩存測試，當前緩存內容：票據" + temp + ",時間：" + DateTime.Now.IString());
147             if (!temp.IsEmpty())
148             {
149                 return jsapiticket = temp;
150             }
151             else {
152                 string apiUrl = string.Format("https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token={0}&type=jsapi", GetAccessToken(appid, appSecret));
153                 string responseStr = Get(apiUrl, out errmsg, null);
154                 if (responseStr == null)
155                 {
156                     return null;
157                 }
158                 else
159                 {
160                     JsonData jd = JsonMapper.ToObject(responseStr);
161                     jsapiticket = (string)jd["ticket"];
162                     if (!jsapiticket.IsEmpty())
163                     {
164                         //CacheHelper.AddCache(m_CacheKey_jsapiticket, jsapiticket, 1);
165                         DateTime m_expiryTime = DateTime.Now.AddMilliseconds(60000);
166                         MemcachHelper.Add(m_CacheKey_jsapiticket, jsapiticket, m_expiryTime);
167                         //Functions.Write("緩存測試，添加緩存操做，內容：票據" + jsapiticket + ",時間：" + DateTime.Now.IString());
168                         return jsapiticket;
169                     }
170                     else
171                     {
172                         return null;
173                     }
174                 }
175             }
176         }
177         #endregion
178 
179         #region JS SDK使用權限簽名算法
180         /// <summary>
181         /// JS SDK使用權限簽名算法
182         /// </summary>
183         /// <param name="jsapiTicket">The jsapi_ticket.</param>
184         /// <param name="url">The URL.</param>
185         /// <returns></returns>
186         public static Dictionary<string, string> Sign(string jsapiTicket, string url, string appid)
187         {
188             string nonceStr = Guid.NewGuid().ToString().Replace("-", "");
189             string timestamp = GenerateTimeStamp();
190             string str = string.Format("jsapi_ticket={0}&noncestr={1}&timestamp={2}&url={3}", jsapiTicket, nonceStr, timestamp, url);
191             string signature = GetSha1Str(str);//SHA1加密
192             return new Dictionary<string, string>{
193                 {"appid", appid},
194                 {"jsapi_ticket", jsapiTicket},
195                 {"noncestr", nonceStr},
196                 {"timestamp", timestamp},
197                 {"signature", signature}
198             };
199         }
200         public static string GenerateTimeStamp()
201         {
202             TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);
203             return Convert.ToInt64(ts.TotalSeconds).ToString();
204         }
205         #endregion
206     }
207 }

認證簽名類

當中用到了分佈式緩存幫助類，代碼以下

  1 using Memcached.ClientLibrary;
  2 using System;
  3 using System.Collections;
  4 using System.Collections.Generic;
  5 using System.Configuration;
  6 using System.Linq;
  7 using System.Text;
  8 
  9 namespace Components.Helper
 10 {
 11     /// <summary>分佈式緩存Memcach幫助類</summary>
 12     public class MemcachHelper
 13     {
 14         private static MemcachedClient _client;
 15         /// <summary>默認緩存時間(默認20分鐘)</summary>
 16         public static int DefaultCacheTime = (!string.IsNullOrEmpty(ConfigurationManager.AppSettings["DefaultCacheTime"]) ? Convert.ToInt32(ConfigurationManager.AppSettings["DefaultCacheTime"]) : 1200000);
 17 
 18         /// <summary>
 19         /// 是否啓用分佈式緩存
 20         /// </summary>
 21         public static bool IsEnableScatteredCache = (!string.IsNullOrEmpty(ConfigurationManager.AppSettings["IsEnableScatteredCache"]) ? Convert.ToBoolean(ConfigurationManager.AppSettings["IsEnableScatteredCache"]) : true);
 22         static MemcachHelper()
 23         {
 24             string[] serverlist = (!string.IsNullOrEmpty(ConfigurationManager.AppSettings["Memcached.ServerList"]) ? ConfigurationManager.AppSettings["Memcached.ServerList"].Split(',') : null);
 25 
 26             if (null == serverlist)
 27             {
 28                 serverlist = new string[] { "127.0.0.1:11211" };
 29             }
 30 
 31             SockIOPool pool = SockIOPool.GetInstance("First");
 32             pool.SetServers(serverlist);
 33             pool.Initialize();
 34 
 35             //初始化
 36             _client = new MemcachedClient();
 37             _client.PoolName = "First";
 38             _client.EnableCompression = false;
 39         }
 40 
 41         #region Add
 42         public static bool Add(string key, object value)
 43         {
 44             DateTime m_expiryTime = DateTime.Now.AddMilliseconds(DefaultCacheTime);
 45             return _client.Add(key, value, m_expiryTime);
 46         }
 47         public static bool Add(string key, object value, DateTime expiry)
 48         {
 49             return _client.Add(key, value, expiry);
 50         }
 51         public static bool Add(string key, object value, int hashCode)
 52         {
 53             return _client.Add(key, value, hashCode);
 54         }
 55         public static bool Add(string key, object value, DateTime expiry, int hashCode)
 56         {
 57             return _client.Add(key, value, expiry, hashCode);
 58         }
 59         #endregion
 60 
 61         #region Delete
 62         /// <summary>刪除緩存</summary>
 63         /// <param name="key"></param>
 64         /// <returns></returns>
 65         public static bool Delete(string key)
 66         {
 67             return _client.Delete(key);
 68         }
 69 
 70         /// <summary>刪除緩存</summary>
 71         /// <param name="key"></param>
 72         /// <param name="expiry"></param>
 73         /// <returns></returns>
 74         public static bool Delete(string key, DateTime expiry)
 75         {
 76             return _client.Delete(key, expiry);
 77         }
 78 
 79         /// <summary>刪除緩存</summary>
 80         /// <param name="key"></param>
 81         /// <param name="hashCode"></param>
 82         /// <param name="expiry"></param>
 83         /// <returns></returns>
 84         public static bool Delete(string key, object hashCode, DateTime expiry)
 85         {
 86             return _client.Delete(key, hashCode, expiry);
 87         }
 88 
 89         #endregion
 90 
 91         #region Get
 92         /// <summary>獲取緩存</summary>
 93         /// <param name="key"></param>
 94         /// <returns></returns>
 95         public static object Get(string key)
 96         {
 97             return _client.Get(key);
 98         }
 99         /// <summary>獲取緩存</summary>
100         /// <param name="key"></param>
101         /// <param name="hashCode"></param>
102         /// <returns></returns>
103         public static object Get(string key, int hashCode)
104         {
105             return _client.Get(key, hashCode);
106         }
107         /// <summary>獲取緩存</summary>
108         /// <param name="key"></param>
109         /// <param name="hashCode"></param>
110         /// <param name="asString"></param>
111         /// <returns></returns>
112         public static object Get(string key, object hashCode, bool asString)
113         {
114             return _client.Get(key, hashCode, asString);
115         }
116         #endregion
117 
118         #region Replace
119         /// <summary>
120         /// 替換更新
121         /// </summary>
122         /// <param name="key"></param>
123         /// <param name="value"></param>
124         /// <returns></returns>
125         public static bool Replace(string key, object value)
126         {
127             return _client.Replace(key, value);
128         }
129         /// <summary>
130         /// 替換更新
131         /// </summary>
132         /// <param name="key"></param>
133         /// <param name="value"></param>
134         /// <param name="expiry"></param>
135         /// <returns></returns>
136         public static bool Replace(string key, object value, DateTime expiry)
137         {
138             return _client.Replace(key, value, expiry);
139         }
140         /// <summary>
141         /// 替換更新
142         /// </summary>
143         /// <param name="key"></param>
144         /// <param name="value"></param>
145         /// <param name="hashCode"></param>
146         /// <returns></returns>
147         public static bool Replace(string key, object value, int hashCode)
148         {
149             return _client.Replace(key, value, hashCode);
150         }
151         /// <summary>
152         /// 替換更新
153         /// </summary>
154         /// <param name="key"></param>
155         /// <param name="value"></param>
156         /// <param name="expiry"></param>
157         /// <param name="hashCode"></param>
158         /// <returns></returns>
159         public static bool Replace(string key, object value, DateTime expiry, int hashCode)
160         {
161             return _client.Replace(key, value, expiry, hashCode);
162         }
163         #endregion
164 
165         #region Set
166         public static bool Set(string key, object value)
167         {
168             return _client.Set(key, value);
169         }
170         public static bool Set(string key, object value, DateTime expiry)
171         {
172             return _client.Set(key, value, expiry);
173         }
174         public static bool Set(string key, object value, int hashCode)
175         {
176             return _client.Set(key, value, hashCode);
177         }
178         public static bool Set(string key, object value, DateTime expiry, int hashCode)
179         {
180             return _client.Set(key, value, expiry, hashCode);
181         }
182         #endregion
183 
184         #region Stats
185         public static Hashtable Stats()
186         {
187             return _client.Stats();
188         }
189 
190         public static Hashtable Stats(ArrayList servers)
191         {
192             return _client.Stats(servers);
193         }
194         #endregion
195 
196         /// <summary>判斷指定Key的緩存是否存在</summary>
197         /// <param name="key"></param>
198         /// <returns></returns>
199         public static bool KeyExists(string key)
200         {
201             return _client.KeyExists(key);
202         }
203 
204         /// <summary>
205         /// 移除緩存,針對空間
206         /// </summary>
207         /// <param name="key"></param>
208         public static void RemoveRegionCache(string regionName)
209         {
210 
211         }
212     }
213 }

分佈式緩存類

簽名的實現：三個參數 ①url  ②微信appid  ③微信 AppSecret，注意微信官方要求url是取「#」前邊的部分做爲參數。

下面是示例代碼，僅供參考。

 1 Dictionary<string, string> dic = new Dictionary<string, string>();
 2             string url = postData["url"].IString();
 3             string[] urlarray = url.Split('#');
 4             url = urlarray[0].IString();
 5             string appid = "wx12344566778";
 6             string AppSecret = "testtest12345678test";
 7             string ticket = WxJsSdkHelper.GetJsApiTicket(appid, AppSecret);
 8             if (!ticket.IsEmpty())
 9             {
10                 dic = WxJsSdkHelper.Sign(ticket, url, appid);
11                 result.Result = JsonMapper.ToJson(dic);
12             }