微信开发中 ACCESS TOKEN 过期失效的解决方案详解

why 196 2024-09-10

微信开发-access token 过期失效解决方案

微信开发中 ACCESS TOKEN 过期失效的解决方案详解

起因:因为access_token的重要性,开发过微信的都知道,但是他有自己的生命周期,官方解释为:"有效期为7200秒",一天调用2000次。流量一高,就over了,没办法,龙哥不帮我们解决问题,我们就要自己解决,不能等死。

解决思路很简单:建立公共access token数据,有效期内不重新创建access_token。

解决方案:
1、微信类库:有效期内直接读取access token数据文件中的json数据,过期失效,重新获取并创建新的access token数据文件
2、数据文件:存放有效的access token数据,具体有:access_token.json和jsapi_ticket.json

核心代码如下:

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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

+        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))

+            {

+                jsonModel = new CommonJsonModel(filecontent);

+            }

+            sr.Close();

+            sr.Dispose();

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

+            {

+                string url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" + appId +

+                             "&secret=" + appSecret + "";

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

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

+                if (access_token != "")

+                {

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

+                    StreamWriterMetod(json, path);

+                }

+            }

+            else

+            {

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

+            }

+            return access_token;

+        }

+

+

+        //发起一个http请球,返回值

+        private string httpGet(string url)

+        {

+            try

+            {

+                var MyWebClient = new WebClient();

+                MyWebClient.Credentials = CredentialCache.DefaultCredentials; //获取或设置用于向Internet资源的请求进行身份验证的网络凭据

+                Byte[] pageData = MyWebClient.DownloadData(url); //从指定网站-数据

+                string pageHtml = System.Text.Encoding.Default.GetString(pageData);//如果获取网站页面采用的是GB2312,则使用这句            

+                //string pageHtml = Encoding.UTF8.GetString(pageData); //如果获取网站页面采用的是UTF-8,则使用这句

+                return pageHtml;

+            }

+            catch (WebException webEx)

+            {

+                Console.WriteLine(webEx.Message.ToString());

+                return null;

+            }

+        }

+  

+  

+        //SHA1哈希加密算法

+        private string SHA1_Hash(string str_sha1_in)

+        {

+            SHA1 sha1 = new SHA1CryptoServiceProvider();

+            byte[] bytes_sha1_in = System.Text.UTF8Encoding.Default.GetBytes(str_sha1_in);

+            byte[] bytes_sha1_out = sha1.ComputeHash(bytes_sha1_in);

+            string str_sha1_out = BitConverter.ToString(bytes_sha1_out);

+            str_sha1_out = str_sha1_out.Replace("-", "").ToLower();

+            return str_sha1_out;

+        }

+  

+  

+        /// <summary>

+        /// StreamWriter写入文件方法

+        /// </summary>

+        private void StreamWriterMetod(string str, string patch)

+        {

+            FileStream stream = new FileStream(patch, FileMode.OpenOrCreate, FileAccess.Write, FileShare.Delete | FileShare.ReadWrite);

+            StreamWriter writer = new StreamWriter(stream);

+            writer.WriteLine(str);

+            stream.Flush();

+            writer.Close();

+            stream.Close();

+            stream.Dispose();

+            writer.Dispose();

+        }

+  

+  

+  

+        /// <summary>

+        /// 将c# DateTime时间格式转换为Unix时间戳格式

+        /// </summary>

+        /// <param name="time">时间</param>

+        /// <returns>double</returns>

+        private int ConvertDateTimeInt(System.DateTime time)

+        {

+            int intResult = 0;

+            System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));

+            intResult = Convert.ToInt32((time - startTime).TotalSeconds);

+            return intResult;

+        }

+

+

+    }

+

+

+}

  

  

access_token.json

{"access_token":"4H14BVCUrAxxxxxxxxxxxxWeLu-zKETaBYqsoKFjsHZDc3xOwc-m43WDw2HjzxEkng2nC7iJuHydNt5PqRDY7HCoAU4lmuaPoYsIQHdW9kA","expire_time":1428599121}

 

access_token.json

{"jsapi_ticket":"bxLdikRXVbTPdHSM05e5u1wgoccccccccccccccccccccccccccccc11FFzYsiqbXZN0SDGN6Dnksnt2Q","expire_time":1428599122}



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