asp.net 微信JsSDK

 

有时间再整理吧

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.IO;
using Newtonsoft.Json;
using System.Net;
using System.Runtime.Serialization.Formatters.Binary;
using System.Text;
using System.Security.Cryptography;
using System.Data;
using Common;

namespace LingDing.test
{
    /// <summary>
    /// WXJSSDK 的摘要说明
    /// </summary>
    public class WXJSSDK
    {
        private string appId;
        private string appSecret;
        private DataTable DT;

        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();
            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);

            System.Collections.Hashtable 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 = "";
            Random 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()
        {
            //这里我从数据库读取
            DT = new DAL.FreeBase().TranSQLGetTable("select jsapi_ticket,ticket_expires from tokens where ID=1");
            int expire_time = (int)DT.Rows[0]["ticket_expires"];
            string ticket = DT.Rows[0]["jsapi_ticket"].ToString();
            string accessToken = GetTokenName(); //getAccessToken();//获取系统的全局token 
            if (expire_time < ConvertDateTimeInt(DateTime.Now))
            {
                string url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=" + accessToken + "";
                Jsapi api = JsonConvert.DeserializeObject<Jsapi>(httpGet(url));
                ticket = api.ticket;
                if (ticket != "")
                {
                    expire_time = ConvertDateTimeInt(DateTime.Now) + 7000;
                    //存入数据库操作
                    new DAL.FreeBase().TranSQL("update tokens set jsapi_ticket='" + ticket + "',ticket_expires='" + expire_time + "' where ID=1");
                }
            }
            return ticket;
        }

        string GetTokenName()//得到tokenname
        {
            //string projectname = "类名:" + System.Reflection.MethodBase.GetCurrentMethod().DeclaringType.FullName;
            string projectname = System.Reflection.MethodBase.GetCurrentMethod().DeclaringType.FullName;
            string classname = projectname.Substring(projectname.IndexOf('.') + 1);
            string tokenname = GetConfig.gettoken(classname);
            return tokenname;
        }
        ////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(@"/weixin/access_token.json");
        //    FileStream file = new FileStream(path, FileMode.Open);
        //    var serializer = new DataContractJsonSerializer(typeof(AccToken));
        //    AccToken readJSTicket = (AccToken)serializer.ReadObject(file);
        //    file.Close();
        //    if (readJSTicket.expires_in < ConvertDateTimeInt(DateTime.Now))
        //    {
        //        string url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" + appId + "&secret=" + appSecret + "";

        //        AccToken iden = Desrialize<AccToken>(new AccToken(), httpGet(url));

        //        access_token = iden.access_token;
        //        if (access_token != "")
        //        {
        //            iden.expires_in = ConvertDateTimeInt(DateTime.Now) + 7000;
        //            iden.access_token = access_token;

        //            string json = Serialize<AccToken>(iden);
        //            StreamWriterMetod(json, path);
        //        }
        //    }
        //    else
        //    {
        //        access_token = readJSTicket.access_token;
        //    }
        //    return access_token;
        //}


        //发起一个http请球，返回值  
        private string httpGet(string url)
        {
            try
            {
                WebClient 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); //从指定网站下载数据  
                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              

                return pageHtml;
            }
            catch (WebException webEx)
            {
                Console.WriteLine(webEx.Message.ToString());
                return null;
            }
        }


        //SHA1哈希加密算法  
        public 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)
        {
            try
            {
                FileStream fsFile = new FileStream(patch, FileMode.OpenOrCreate);
                StreamWriter swWriter = new StreamWriter(fsFile);
                swWriter.WriteLine(str);
                swWriter.Close();
            }
            catch (Exception e)
            {
                throw e;
            }
        }

        /// <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>  
        public 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;
        }
    }
    //创建Json序列化 及反序列化类目  
    #region
    //创建JSon类 保存文件 jsapi_ticket.json  
    public class JSTicket
    {

        public string jsapi_ticket { get; set; }

        public double expire_time { get; set; }
    }
    //创建 JSon类 保存文件 access_token.json  

    public class AccToken
    {

        public string access_token { get; set; }

        public double expires_in { get; set; }
    }


    //创建从微信返回结果的一个类 用于获取ticket  

    public class Jsapi
    {

        public int errcode { get; set; }

        public string errmsg { get; set; }

        public string ticket { get; set; }

        public string expires_in { get; set; }
    }
    #endregion
}