微信公众号开发淘宝优惠券查询的思路和原理

约定不等于承诺〃 2021-12-10 07:53 304阅读 0赞

做微信公众号查券首先需要一个1个产品库，我们可以使用淘宝的开放平台提供的产品库通用物料搜索API。

通过用户手淘分享的商品信息，信息中包含商品标题和链接还有淘口令，我们可以用正则表达式提取出商品标题

或者通过分享信息中的淘宝链接http抓包方式获取淘宝商品id; 然后通过id在查询的一批商品中找到指定的商品优惠券、佣金等信息。

关键代码如下

public static string GetTaobaoCoupon(RequestMessageText responseMessageText)
            {
                string itemInfo = responseMessageText.Content.Trim();
    
                string responeMessage = "";
                try
                {
                    Match m_title = Regex.Match(itemInfo, @"【.*】");
                    string temp = m_title.Value;
                    if (!string.IsNullOrEmpty(temp))
                    {
                        temp = temp.Substring(1, temp.Length - 2);
                    }
                    else
                    {
                        return "";
                    }
    
                    if (temp.Contains("#手聚App"))
                    {
                        int IndexofA = temp.IndexOf("宝贝不错:");
                        int IndexofB = temp.IndexOf("(分享自");
                        temp = temp.Substring(IndexofA + 5, IndexofB - IndexofA - 5);
                    }
    
                    string title = temp;
    
                    //通过商品关键字查询商品
                    ITopClient client = new DefaultTopClient(taobaoApiUrl,taobaoAppkey, taobaoSecret);
                    TbkDgMaterialOptionalRequest req = new TbkDgMaterialOptionalRequest();
                    req.AdzoneId = addzoneId;
                    req.Platform = 2L;
                    
                    req.PageSize = 100L;
                    req.Q = title;
               
                    req.PageNo = 1L;
                    TbkDgMaterialOptionalResponse rsp = client.Execute(req);
    
                    if (rsp.ResultList.Count > 0)
                    {
                        //获取淘宝短链接
                        Match m_url = Regex.Match(itemInfo, @"htt(p|ps):\/\/([\w\-]+(\.[\w\-]+)*\/)*[\w\-]+(\.[\w\-]+)*\/?(\?([\w\-\.,@?^=%&:\/~\+#]*)+)?");
    
                        if (m_url.Value == "")
                        {
                            return responeMessage;
                        }
                        var s = HttpUtility.HttpGet(m_url.Value, "", "utf-8");
    
                        //Match am_url = Regex.Match(s, @"(?<=var url = ')(.*)(?=')");
                        //获取宝贝item id
                        Match m_item = Regex.Match(s, @"(?<=m.taobao.com\/i)([0-9]*)");
                        string item_id = m_item.Value;
    
                        if (string.IsNullOrEmpty(item_id))
                        {
                            Match am_url = Regex.Match(s, @"(?<=var url = ')(.*)(?=')");
                            var htmlContent = HttpUtility.HttpGet(am_url.Value, "", "gbk");
                            Match re_m_item = Regex.Match(htmlContent, @"(?<=taobao.com/item.htm\?id=)([0-9]*)");
                            item_id = re_m_item.Value;
                        }
    
                        if (string.IsNullOrEmpty(item_id))
                        {
                            //LogHelper.WriteLog(typeof(WechatController), "通过抓包方式未获取到宝贝item id");
                            var g = rsp.ResultList.Where(y => !string.IsNullOrEmpty(y.CouponId)).OrderByDescending(w => w.Volume).FirstOrDefault();
                            if (g == null)
                            {
                                responeMessage = ConfigurationManager.AppSettings["tbk_nocoupon_msg"].Replace("\\n", "\n").Replace("\\ue231", "\ue231");
    
                            }
                            else
                            {
                                var hongbao = (decimal.Parse(g.ZkFinalPrice) - decimal.Parse(Regex.Match(g.CouponInfo, "减" + @"(\d+)").Groups[1].Value)) * decimal.Parse(g.CommissionRate) / 10000 * commission_rate;
                                
                                responeMessage = $"{g.Title}\n【在售价】{g.ZkFinalPrice}元\n【巻后价】{Math.Round(double.Parse(g.ZkFinalPrice) - double.Parse(Regex.Match(g.CouponInfo, "减" + @"(\d+)").Groups[1].Value), 2)} 元\n复制这条信息，打开「手机绹宝」领巻下单{GetTaobaoKePassword(g.CouponShareUrl, g.PictUrl + "_400x400.jpg")}\n";
    
                            }
                            return responeMessage;
    
                        }
                        else
                        {
                            float numid = 0;
                            try
                            {
                                numid = float.Parse(item_id);
                            }
                            catch (Exception ex)
                            {
    
                              //通过淘宝链接没有获取到item id,显示销量最高商品
                                var g = rsp.ResultList.Where(y => !string.IsNullOrEmpty(y.CouponId)).OrderByDescending(y => y.Volume).FirstOrDefault();
    
                                var hongbao = (decimal.Parse(g.ZkFinalPrice) - decimal.Parse(Regex.Match(g.CouponInfo, "减" + @"(\d+)").Groups[1].Value)) * decimal.Parse(g.CommissionRate) / 10000 * commission_rate;
                                responeMessage = $"{g.Title}\n【在售价】{g.ZkFinalPrice}元\n【巻后价】{Math.Round(double.Parse(g.ZkFinalPrice) - double.Parse(Regex.Match(g.CouponInfo, "减" + @"(\d+)").Groups[1].Value), 2)} 元\n复制这条信息，打开「手机绹宝」领巻下单{GetTaobaoKePassword(g.CouponShareUrl, g.PictUrl + "_400x400.jpg")}\n";
    
                                return responeMessage;
    
                            }
    
                            //在接口返回的商品中找查询的商品
                            foreach (var g in rsp.ResultList)
                            {
                                if (g.NumIid == numid)
                                {
                                    if (string.IsNullOrEmpty(g.CouponInfo))
                                    {
                                        var hongbao = decimal.Parse(g.ZkFinalPrice) * decimal.Parse(g.CommissionRate) / 10000 * commission_rate;
    
                                        responeMessage = $"{g.Title}\n【在售价】{g.ZkFinalPrice}元\n【约返利】{Math.Round(hongbao, 2)}元\n复制这条信息，打开「手机绹宝」领巻下单{GetTaobaoKePassword(g.Url, g.PictUrl + "_400x400.jpg")}\n==========================\n下单确认收货后就能收到返利佣金啦~\n 点击查看  <a href='http://mp.weixin.qq.com/s?__biz=Mzg2NTAxOTEyMA==&mid=100000146&idx=1&sn=62405c8df3db46e74940aefb9ac3737b&chksm=4e61340d7916bd1bf645afbc6d10c1f19561d7fa59847516c01e64c0791e6d544f4f56c4f498#rd'>如何领取返利</a>";
                                        return responeMessage;
                                    }
                                    else
                                    {
                                        var hongbao = (decimal.Parse(g.ZkFinalPrice) - decimal.Parse(Regex.Match(g.CouponInfo, "减" + @"(\d+)").Groups[1].Value)) * decimal.Parse(g.CommissionRate) / 10000 * commission_rate;
                                        responeMessage = $"{g.Title}\n【在售价】{g.ZkFinalPrice}元\n【巻后价】{Math.Round(double.Parse(g.ZkFinalPrice) - double.Parse(Regex.Match(g.CouponInfo, "减" + @"(\d+)").Groups[1].Value), 2)} 元\n复制这条信息，打开「手机绹宝」领巻下单{GetTaobaoKePassword(g.CouponShareUrl, g.PictUrl + "_400x400.jpg")}\n";
                                        return responeMessage;
                                    }
                                }
                            }
    
                            //没有找到，有相似宝贝推荐
                            var w = rsp.ResultList.Where(y => !string.IsNullOrEmpty(y.CouponId)).OrderByDescending(y => y.Volume).FirstOrDefault();
    
                            if (w == null)
                            {
                                responeMessage = ConfigurationManager.AppSettings["tbk_nocoupon_msg"].Replace("\\n", "\n").Replace("\\ue231", "\ue231");
                            }
                            else
                            {
                                var hongbao = (decimal.Parse(w.ZkFinalPrice) - decimal.Parse(Regex.Match(w.CouponInfo, "减" + @"(\d+)").Groups[1].Value)) * decimal.Parse(w.CommissionRate) / 10000 * commission_rate;
    
                                responeMessage = $"/:rose 亲，这款商品的优惠返利活动结束了~\n已为你推荐以下宝贝。\n==========================\n{w.Title}\n【在售价】{w.ZkFinalPrice}元\n【巻后价】{Math.Round(double.Parse(w.ZkFinalPrice) - double.Parse(Regex.Match(w.CouponInfo, "减" + @"(\d+)").Groups[1].Value), 2)} 元\n复制这条信息，打开「手机绹宝」领巻下单{GetTaobaoKePassword(w.CouponShareUrl, w.PictUrl + "_400x400.jpg")}\n";
                            }
    
                            return responeMessage;
    
                        }
    
    
                    }
                    else
                    {
                        responeMessage = ConfigurationManager.AppSettings["tbk_nocoupon_msg"].Replace("\\n", "\n").Replace("\\ue231", "\ue231");
    
                    }
    
                }
                catch (Exception ex)
                {
                    //LogHelper.WriteLog(typeof(WechatController), "返回消息异常" + ex.Message);
    
                }
    
                return responeMessage;
    
            }