C# 读取网页验证码并模拟提交表单 充值 ScrapySharp Demo

【实例截图】

【核心代码】

using System;
using System.Text;
using System.Web;
using CardPay.Enums;
using HtmlAgilityPack;
using ScrapySharp.Extensions;
using ScrapySharp.Html.Forms;
using ScrapySharp.Network;

namespace CardPay.Plat
{
    public class ZongYouCard2:ICardPay
    {
        ScrapingBrowser browser;
        private WebForm curForm { get; set; }
        const string RequestUrl = "http://www.6186.com/ChargeProduct2016.aspx?pt=1108&ptpc=11080101";
        public ZongYouCard2()
        {
            browser=new ScrapingBrowser {Encoding = Encoding.UTF8};
        }
        public byte[] GetValidCodeImage()
        {
            var html = browser.DownloadString(new Uri(RequestUrl));
            html = html.Replace("onchange=\"selectrole_onchange()\">", "onchange=\"selectrole_onchange()\"><option value=''></option>");

            HtmlNode.ElementsFlags.Remove("form");
            var doc = new HtmlDocument();
            doc.LoadHtml(html);
            var formNode = doc.GetElementbyId("aspnetForm");
            var webForm = new WebForm(formNode);

            var nodes = doc.DocumentNode.CssSelect("textarea");
            foreach (var htmlNode in nodes)
            {
                webForm.FormFields.Add(new FormField() { Name = htmlNode.GetAttributeValue("name", "xxxxxx"), Value = (HttpUtility.HtmlDecode(htmlNode.InnerText)) });

            }
            curForm = webForm;


            var validCodeUrl = string.Format("http://www.6186.com/{0}", webForm["ctl00$ContentPlaceHolder1$hfRandom"]);

            var res=browser.DownloadWebResource(new Uri(validCodeUrl));
            return res.Content.ToArray();
            //throw new NotImplementedException();
        }

        public PayResult Pay(CardInfo card, string validCode,string account)
        {
            var webForm = curForm;
            webForm["ctl00$ContentPlaceHolder1$txtCardNo_1"] = card.cardNo;
            webForm["ctl00$ContentPlaceHolder1$txtCardPwd_1"] = card.cardPwd;
            //webForm["ctl00$ContentPlaceHolder1$txtCardNo_2"] = card2.cardNo;
            //webForm["ctl00$ContentPlaceHolder1$txtCardPwd_2"] = card2.cardPwd;
            //...
            webForm["ctl00$ContentPlaceHolder1$txtRandom"] = validCode;
           
            webForm["ctl00$ContentPlaceHolder1$txtAccount"] = account;
            webForm["ctl00$ContentPlaceHolder1$txtReAccount"] = account;

            //webForm.Submit(browser,new Uri(RequestUrl));

            var html=browser.NavigateTo(new Uri(RequestUrl), HttpVerb.Post, webForm.SerializeFormFields());

             if (html.Contains("验证码错误"))
            return new PayResult() { errMsg = "验证码错误", state = PayState.充值失败 };
            else if (html.Contains("卡密 1 错误"))
                return new PayResult() { errMsg = "卡密 1 错误", state = PayState.充值失败 };
            else return new PayResult() { errMsg = html, state = PayState.结果不明 };

            //throw new NotImplementedException();
        }
    }
}