erp/SiteCore/Handler/GetMiniCode.cs

using System.Collections.Generic;
using System.Web;
using System.Web.Script.Serialization;
using Utils;

namespace SiteCore.Handler
{
    public class GetMiniCode : BaseHandler, IHttpHandler
    {
        string appid = "wx20432512482565e9";
        string appsecret = "07492bc9cbbc5b303e5e135b4dccd6f0";
        public void ProcessRequest(HttpContext context)
        {
            con = context;
            CommonHelper.PageExpires();
            HttpHelper http = new HttpHelper();
            HttpResult hResult = null;
            object cat = WebCache.GetCache("at");
            if (cat == null)
            {
                HttpItem item = new HttpItem()
                {
                    URL = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" + appid + "&secret=" + appsecret
                };
                hResult = http.GetHtml(item);
                string html = hResult.Html;
                JavaScriptSerializer jss = new JavaScriptSerializer();
                Dictionary<string, object> jObj = jss.Deserialize<Dictionary<string, object>>(html);
                if (!jObj.ContainsKey("errcode"))
                {
                    string at = jObj["access_token"].ToString();
                    WebCache.AddCacheWithTime("at", at, 1.8);
                    cat = at;
                }
            }
            if (cat != null)
            {
                string st = GetString("st");
                string pdata = "";
                string url = "";
                if (st == "a")
                {
                    pdata = "{\"width\":520,\"line_color\":{\"r\":\"17\",\"g\":\"123\",\"b\":\"185\"},\"path\":\"pages/index\"}";
                    url = "https://api.weixin.qq.com/wxa/getwxacode?access_token=";
                }
                else
                {
                    pdata = "{\"width\":520,\"path\":\"pages/index\"}";
                    url = "https://api.weixin.qq.com/cgi-bin/wxaapp/createwxaqrcode?access_token=";
                }

                HttpItem item = new HttpItem()
                {
                    URL = url + cat,
                    Method = "POST",
                    Postdata = pdata,
                    //Postdata = "scene=bbbb&page=pages/home/home",
                    ResultType = ResultType.Byte,
                    Accept = "image/webp,image/*,*/*;q=0.8",
                    ContentType = "application/json"
                };
                //HttpItem item = new HttpItem()
                //{
                //    URL = "https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=" + cat,
                //    Method = "POST",
                //    Postdata = "{\"scene\":\"s" + bid + "\",\"width\":450,\"line_color\":{\"r\":\"17\",\"g\":\"123\",\"b\":\"185\"},\"path\":\"pages/home/home?bid=" + bid + "&btime=" + DateTime.Now.ToString("HHmm") + "\"}",
                //    //Postdata = "scene=bbbb&page=pages/home/home",
                //    ResultType = ResultType.Byte,
                //    Accept = "image/webp,image/*,*/*;q=0.8",
                //    ContentType = "application/json"
                //};
                hResult = http.GetHtml(item);
                if (hResult.Html.IndexOf("errcode") != -1)
                {
                    return;
                }
                con.Response.ClearContent(); //需要输出图象信息 要修改HTTP头 
                con.Response.ContentType = "image/bmp";
                con.Response.BinaryWrite(hResult.ResultByte);
                con.Response.End();
            }
        }

    }
}