ACCESS TOKEN 过期失效解决之法,微信开发必知

Index: wxjsSDK.cs

===================================================================

--- wxjsSDK.cs  (revision 0)

+++ wxjsSDK.cs  (revision 1)

@@ -0,0 +1,209 @@

+using System;

+using System.Collections.Generic;

+using System.Web;

+using System.IO;

+using System.Security.Cryptography;

+using System.Runtime.Serialization.Json;

+using System.Runtime.Serialization;

+using System.Net;

+using System.Runtime.Serialization.Formatters.Binary;

+using System.Text;

+

+namespace JR.Common

+{

+    public class wxjsSDK

+    {

+        private string appId;

+        private string appSecret;

+

+

+        public wxjsSDK(string appId, string appSecret)

+        {

+            this.appId = appId;

+            this.appSecret = appSecret;

+        }

+  

+  

+  

+        //得到数据包，返回使用页面

+        public System.Collections.Hashtable getSignPackage()

+        {

+            string jsapiTicket = getJsApiTicket();

+            string url = HttpContext.Current.Request.Url.ToString(); //"http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";

+            string timestamp = Convert.ToString(ConvertDateTimeInt(DateTime.Now));

+            string nonceStr = createNonceStr();

+            // 这里参数的顺序要按照 key 值 ASCII 码升序排序

+            string rawstring = "jsapi_ticket=" + jsapiTicket + "&noncestr=" + nonceStr + "&timestamp=" + timestamp + "&url=" + url + "";

+            string signature = SHA1_Hash(rawstring);

+            var signPackage = new System.Collections.Hashtable();

+            signPackage.Add("appId", appId);

+            signPackage.Add("nonceStr", nonceStr);

+            signPackage.Add("timestamp", timestamp);

+            signPackage.Add("url", url);

+            signPackage.Add("signature", signature);

+            signPackage.Add("rawString", rawstring);

+            return signPackage;

+        }

+  

+  

+        //创建随机字符串

+        private string createNonceStr()

+        {

+            int length = 16;

+            string chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";

+            string str = "";

+            var rad = new Random();

+            for (int i = 0; i < length; i++)

+            {

+                str += chars.Substring(rad.Next(0, chars.Length - 1), 1);

+            }

+            return str;

+        }

+

+

+        //得到ticket 如果文件里时间 超时则重新获取

+        private string getJsApiTicket()

+        {

+            string ticket = "";

+            // jsapi_ticket 应该全局存储与更新，以下代码以写入到文件中做示例

+            string path = HttpContext.Current.Server.MapPath(@"/log/jssdk/jsapi_ticket.json");

+            if (!File.Exists(path))

+            {

+                File.Create(path).Close();

+            }

+            StreamReader sr = new StreamReader(path, System.Text.Encoding.Default);

+            string filecontent = sr.ReadToEnd();

+            CommonJsonModel jsonModel = null;

+            if (!string.IsNullOrEmpty(filecontent))

+            {

+                jsonModel = new CommonJsonModel(filecontent);

+            }

+            sr.Close();

+            sr.Dispose();

+            if (jsonModel == null || int.Parse(jsonModel.GetValue("expires_in")) < ConvertDateTimeInt(DateTime.Now))

+            {

+                string accessToken = getAccessToken();

+                string url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=" + accessToken;

+                jsonModel = new CommonJsonModel(httpGet(url));

+                ticket = jsonModel.GetValue("ticket");

+                if (ticket != "")

+                {

+                    string json = "{\"ticket\":\"" + ticket + "\",\"expires_in\":" + (ConvertDateTimeInt(DateTime.Now) + 7000) + "}";

+                    StreamWriterMetod(json, path);

+                }

+            }

+            else

+            {

+                ticket = jsonModel.GetValue("ticket");

+            }

+            return ticket;

+        }

+

+

+        //得到accesstoken 如果文件里时间 超时则重新获取

+        private string getAccessToken()

+        {

+            // access_token 应该全局存储与更新，以下代码以写入到文件中做示例

+            string access_token = "";

+            string path = HttpContext.Current.Server.MapPath(@"/log/jssdk/access_token.json");

+            if (!File.Exists(path))

+            {

+                File.Create(path).Close();

+            }

+            StreamReader sr = new StreamReader(path, System.Text.Encoding.Default);

+            string filecontent = sr.ReadToEnd();

+            CommonJsonModel jsonModel = null;

+            if (!string.IsNullOrEmpty(filecontent))

+            {