C# CefSharp Winform抓取拼多多订单
前言
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只支持查询自己的买家订单
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支持Excel导出，只支持部分字段
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纯技术实战分享
如何使用
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直接运行项目
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登录拼多多
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点击全部订单
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等待页面加载不跳转了，点击 导出订单按钮
登录验证
基于CefSharp Winform加载Web浏览器（chrome内核），浏览器地址导航到http://mobile.yangkeduo.com/personal.html，然后用手机验证码方式登录
获取订单数据
if (request.Method.Equals("POST")&&request.Url.Contains("order_list"))
var filter = FilterManager.GetFileter(request.Identifier.ToString()) as TestJsonFilter;
if (filter==null)
return;
ASCIIEncoding encoding = new ASCIIEncoding();
//这里截获返回的数据
var data = encoding.GetString(filter.DataAll.ToArray());
}
但是由于采用了分页获取的仍然不是全部，这样我们必须通过手动模拟Post请求来加载全部
尝试抓取Post数据
将byte转为string之后得到json
{"timeout":1300,"type":"all","page":1,"pay_channel_list":["9","30","31","35","38","52","97","122","135","322","-1"],"origin_host_name":"mobile.yangkeduo.com","size":10,"offset":"200725-031832966363189"}
看得出size为10条数据 所以尝试更改post入参试试，offset应该是分页的最后条记录作为偏移量，理论我们可以传空试试，从第一条记录消费
结论是拼多多那边做了验证 返回了errorCode 300000
重新梳理！
获取Post Json
Encoding.Default.GetString(request.PostData.Elements[0].Bytes);将Byte转为String
{"timeout":1300,"type":"all","page":1,"pay_channel_list":["9","30","31","35","38","52","97","122","135","322","-1"],"origin_host_name":"mobile.yangkeduo.com","size":10,"offset":"200803-173139887143189"}
{"timeout":1300,"type":"all","page":1,"pay_channel_list":["9","30","31","35","38","52","97","122","135","322","-1"],"origin_host_name":"mobile.yangkeduo.com","size":10,"offset":"200727-071906181943189"}
{"timeout":1300,"type":"all","page":1,"pay_channel_list":["9","30","31","35","38","52","97","122","135","322","-1"],"origin_host_name":"mobile.yangkeduo.com","size":10,"offset":"200725-031832966363189"}
区别的只有offset，那么offset是啥
由于offset是前端请求必然是在后端返回的订单数据里有，所以拿到offset值去搜索，可以找到为订单order_sn字段！
那么下一步的思路清晰了，解析返回的json
解析返回json
public class Order
public long server_time { get; set; }
public List<OrderItem> orders { get; set; }
public class OrderItem {
/// <summary>
/// 快递单号
/// </summary>
public string tracking_number { get; set; }
/// <summary>
/// 订单编码
/// </summary>
public string order_sn { get; set; }
/// <summary>
/// 快递公司ID
/// </summary>
public string shipping_id { get; set; }
/// <summary>
/// 订单状态 4为已收货
/// </summary>
public int status { get; set; }
/// <summary>
/// 订单金额
/// </summary>
public int display_amount { get; set; }
}
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获取返回json，拿到最后一个的订单编码然后重新请求，直到订单查完
if (request.Method.Equals("POST")&&request.Url.Contains("order_list"))
var filter = FilterManager.GetFileter(request.Identifier.ToString()) as TestJsonFilter;
if (filter==null)
return;
ASCIIEncoding encoding = new ASCIIEncoding();
//这里截获返回的数据
var data = encoding.GetString(filter.DataAll.ToArray());
var orderList= JsonConvert.DeserializeObject<Order>(data);
if (orderList.orders!=null&& orderList.orders.Count!=0)
Thread.Sleep(1000);
FilterManager.AddOrder(orderList);
//反向排序
orderList.orders.Reverse();
//获取第一个
var order=orderList.orders.FirstOrDefault();
string json = "{\"timeout\":1300,\"type\":\"all\",\"page\":1,\"pay_channel_list\":[\"9\",\"30\",\"31\",\"35\",\"38\",\"52\",\"97\",\"122\",\"135\",\"322\",\"-1\"],\"origin_host_name\":\"mobile.yangkeduo.com\",\"size\":10,\"offset\":\"#offset#\"}";
json=json.Replace("#offset#", order.order_sn);
chromiumWebBrowser.Navigate(Encoding.Default.GetBytes(json), request);
}
导出Excel
引用NOPI进行导出，将List转为DataTable
演示效果
开源地址
点我前往github
