實際案例: 獲取臨時票証 (JsApi Ticket)

專案中選用大名鼎鼎的 Senparc 微信開發套件

獲取臨時票證處理常式的程式碼 (GetgVXinInfo.ashx)

using Senparc.Weixin;
using Senparc.Weixin.MP;
using Senparc.Weixin.MP.Entities;
using Senparc.Weixin.MP.CommonAPIs;
using ShouJia.BO;
using ShouJia.Facades;
using ShouJia.Debugger;
using System;
using System.IO;
using System.Net;
using System.Text;
using System.Web;

namespace ShouJia.VXinWeb.User.ashx
{
    /// <summary>
    /// VXinInfo 的摘要描述
    /// </summary>
    public class GetVXinInfo : IHttpHandler
    {

        public void ProcessRequest(HttpContext c)
        {
            //string GarageID = c.Request.QueryString["xlc_id"];
            string GarageID = "43";
            string Url = c.Request.UrlReferrer.ToString();

            WebLogs.Debug("Start for GetVXinInfo ", "Start");
            WebLogs.Debug("Get GarageID", GarageID);
            WebLogs.Debug("Get URL", Url);

            SendVXinInfo(GarageID, Url, c);

            WebLogs.Debug("End for GetVXinInfo", "End");
        }

        private void SendVXinInfo(string garageID, string url, HttpContext c)
        {
            VXConfigInfo vxi = WeixinBehaviors.GetVXinInfoByGarage(int.Parse(garageID));

            AccessTokenContainer.TryGetAccessToken(vxi.AppID, vxi.AppSecret);

            string access_token = AccessTokenContainer.GetAccessToken(vxi.AppID);

                WebLogs.Debug("Get AccessToken", access_token);
                WebLogs.Debug("Get AppID", vxi.AppID);

            StringBuilder ticketUrl = new StringBuilder();

            ticketUrl.AppendFormat("https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token={0}&type=jsapi", access_token);

            WebLogs.Debug("Get ticketUrl", ticketUrl.ToString());

            string ticket = JsApiTicketContainer.GetJsApiTicket(vxi.AppID);
            string oragiralStr = "jsapi_ticket=" + ticket + "&noncestr=" + GetRandomString() + "&timestamp=" + GetTimeTrap() + "&url=" + url;
            string signature = SHA1(oragiralStr).ToLower();

            WebLogs.Debug("Get ticket", ticket);
            WebLogs.Debug("Get oragiralStr", oragiralStr);
            WebLogs.Debug("Get signature", signature);

            c.Response.Write("{\"appid\":\"" + vxi.AppID + "\",\"timestamp\":" + GetTimeTrap() + ",\"nonceStr\":\"" + GetRandomString() + "\",\"signature\":\"" + signature + "\"}");
        }

        private int GetTimeTrap()
        {
            return (int)DateTime.Now.Ticks;
        }

        private string GetRandomString()
        {
            string rString = null;
            Random ran = new Random((int)DateTime.Now.Ticks);

            for (int i = 0; i < 10; i++)
                rString += (char)ran.Next((int)‘a‘, (int)‘z‘); 

            return rString;
        }

        private string SHA1(string src)
        {
            byte[] cleanBytes = Encoding.Default.GetBytes(src);
            byte[] hashedBytes = System.Security.Cryptography.SHA1.Create().ComputeHash(cleanBytes);

            return BitConverter.ToString(hashedBytes).Replace("-", "");
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}

前端如何呼叫獲取票證處理常式 (以下為前端頁面的 js 程式碼片段，僅摘錄重點)

    $.ajax({
        url: "/user/ashx/GetVXinInfo.ashx?xlc_id=" + xlcId,
        success: function (data) {
            if (data != "error")
            {
                var wxInfo = $.parseJSON(data);

                wx.config({
                    debug: false, // 羲?覃彸耀宒,覃蚚腔垀衄api腔殿隙硉頗婓諦誧傷alert堤懂ㄛ?猁脤艘換?腔統杅ㄛ褫眕婓pc傷湖羲ㄛ統杅陓洘頗籵徹log湖堤ㄛ躺婓pc傷奀符頗湖荂
                    appId: wxInfo.appid, // 斛沓ㄛ鼠笲瘍腔峔珨梓妎
                    timestamp: wxInfo.timestamp, // 斛沓ㄛ汜傖?靡腔奀潔期
                    nonceStr: wxInfo.nonceStr, // 斛沓ㄛ汜傖?靡腔呴儂揹
                    signature: wxInfo.signature,// 斛沓ㄛ?靡ㄛ獗蜇翹1
                    jsApiList: [‘getLocation‘, ‘closeWindow‘] // 斛沓ㄛ剒猁妏蚚腔JS諉諳蹈桶ㄛ垀衄JS諉諳蹈桶獗蜇翹2
                });

                wx.ready(function () {
                    wx.getLocation({
                        type: ‘wgs84‘,
                        success: function (res) {
                            $.get(
                                "/user/ashx/GetLocation.ashx",
                                { "Location_x": res.latitude, "Location_y": res.longitude },
                                function (data) {
                                    GetXlcList($("#L_xlc")[0], data);
                                }
                            );
                        }
                    });
                });
            }
            else
            {
                GetXlcList($("#L_xlc")[0], "")
            }
        }
    });