爬虫系列一次采集.NET WebForm网站的坎坷历程

今天接到一个活，需要统计人员的工号信息，由于种种原因不能直接连数据库 [无奈]、[无奈]、[无奈]。采取迂回方案，写个工具自动登录网站，采集用户信息。

这也不是第一次采集ASP.NET网站，以前采集的时候就知道，这种网站采集比较麻烦，尤其是WebForm的ASP.NET 网站，那叫一个费劲。

喜欢现在流行的Restful模式的网站，数据接口采集那才叫舒服。

闲话少说，开干

工作量不大，HTTP纯手写

先准备下一个GET/POST预备使用

　　　　public static string Get(string url, Action<string> SuccessCallback, Action<string> FailCallback) {

            HttpWebRequest req = WebRequest.Create(url) as HttpWebRequest;

            req.Method = "GET";

            req.UserAgent = "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36";

            req.Accept = "*/*";

            req.KeepAlive = true;

            req.ServicePoint.ConnectionLimit = int.MaxValue;

            req.ServicePoint.Expect100Continue = false;

            req.CookieContainer = sznyCookie; #静态变量

            req.Credentials = System.Net.CredentialCache.DefaultCredentials;

            string msg = "";

            using (HttpWebResponse rsp = req.GetResponse() as HttpWebResponse)

            {

                using (StreamReader reader = new StreamReader(rsp.GetResponseStream()))

                {

                    msg = reader.ReadToEnd();

                }

            }

            return msg;

        }

　　　　public static string Post(string url, Dictionary<string, string> dicParms, Action<string> SuccessCallback, Action<string> FailCallback) {

            StringBuilder data = new StringBuilder();

            foreach (var kv in dicParms) {

                if (kv.Key.StartsWith("header"))

                    continue;

                data.Append($"&{Common.UrlEncode( kv.Key,Encoding.UTF8)}={ Common.UrlEncode( kv.Value,Encoding.UTF8)}");

            }

            if (data.Length > )

                data.Remove(, );

            HttpWebRequest req = WebRequest.Create(url) as HttpWebRequest;

            req.Method = "POST";

            req.KeepAlive = true;

            req.CookieContainer = sznyCookie;

            req.Connection = "KeepAlive";

            req.KeepAlive = true;

            req.ContentType = "application/x-www-form-urlencoded";

            req.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9";

            req.Referer = url;

            if (dicParms.ContainsKey("ScriptManager1"))

            {

                req.Headers.Add("X-MicrosoftAjax", "Delta=true");

                req.Headers.Add("X-Requested-With", "XMLHttpRequest");

                req.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";

                req.Accept = "*/*";

            }

            req.Headers.Add("Cache-Control", "no-cache");

            req.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.163 Safari/537.36";

            req.ServicePoint.ConnectionLimit = int.MaxValue;

            req.ServicePoint.Expect100Continue = false;

            req.AllowAutoRedirect = true;

            req.Credentials = System.Net.CredentialCache.DefaultCredentials;

            byte[] buffer = Encoding.UTF8.GetBytes(data.ToString());

            using (Stream reqStream = req.GetRequestStream())

            {

                reqStream.Write(buffer, , buffer.Length);

            }

            string msg = "";

            using (HttpWebResponse rsp = req.GetResponse() as HttpWebResponse)

            {

                using (StreamReader reader = new StreamReader(rsp.GetResponseStream()))

                {

                    msg = reader.ReadToEnd();

                    if (msg.Contains("images/dl.jpg") || msg.Contains("pageRedirect||%2flogin.aspx"))

                    {

                        //登录失败

                        if (FailCallback != null)

                            FailCallback(msg);

                    }

                    else {

                        if (SuccessCallback!=null)

                            SuccessCallback(msg);

                    }

                }

            }

            return msg;

        }

整个过程分为登陆、用户信息列表、用户信息详情，分三步走来完成这个项目

登陆

根据Chrome抓包结果编写Login，帐号密码没有任何加密，直接明文显示了，直接用了，根据是否跳转页面判断是否登陆成功。调试查看结果登陆成功了。

根据上面的抓包数据，可以调用下面的代码确定是否登陆成功。

　　　　　　public static bool SznyLogin(string username, string password, Action<string> SuccessCallback, Action<string> FailCallback) {

            string url = "http://127.0.0.1/login.aspx";

            string msg = Get(url, SuccessCallback, FailCallback);

            if (msg.Trim().Length > ) {

                Dictionary<string, string> dicParms = new Dictionary<string, string>();

                dicParms.Add("__VIEWSTATE", "");

                dicParms.Add("__EVENTVALIDATION", "");

                dicParms.Add("Text_Name", "");

                dicParms.Add("Text_Pass", "");

                dicParms.Add("btn_Login.x", new Random().Next().ToString());

                dicParms.Add("btn_Login.y", new Random().Next().ToString());

                MatchCollection mc = Regex.Matches(msg, @"<input[^<>]*?name=""(?<name>[^""]*?)""[^<>]*?value=""(?<val>[^""]*?)""[^<>]*?/?>|<input[^<>]*?name=""(?<name>[^""]*?)""[^<>]*?""[^<>]*?/?>|<select[^<>]*?name=""(?<name>[^""]*?)""[^<>]*?""[^<>]*?/?>", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture);

                foreach (Match mi in mc)

                {

                    if (dicParms.ContainsKey(mi.Groups["name"].Value.Trim()))

                        dicParms[mi.Groups["name"].Value.Trim()] = mi.Groups["val"].Value.Trim();

                }

                dicParms["Text_Name"] = username;

                dicParms["Text_Pass"] = password;

                msg=Post(url, dicParms, SuccessCallback, FailCallback);

                if (msg.Contains("images/dl.jpg") || msg.Contains("pageRedirect||%2flogin.aspx"))

                {

                    return false;

                }

                else

                    return true;

            }

            return false;

        }

抓取人员信息

看到下面这个页面，失望了，列表上没有工号，如果列表上有工号设置一页显示全部信息就可以把所有的数据都抓取到了。

换个思路：是不是我直接设置一页显示所有的数据后，然后根据员工ID可以获取到所有的信息呢？

接下来点击任意一条信息后，查看详情，显示下面的调用结果。Url上没有ID，Get这条路走不通了，查看Post的数据，更失望，没有ID,通过行信息绑定。传统的WebForm 提交模式…

把所有的数据显示到一页，把列表的数据先采集完，然后最后一个页面一个页面的采集工号信息。

　　　　public static CookieContainer sznyCookie = new CookieContainer();

        /// <summary>

        /// 员工信息

        /// </summary>

        public static Dictionary<int, Dictionary<string,string>> dicSznyEmployees = new Dictionary<int, Dictionary<string, string>>();

        public static Dictionary<string, string> dicSznyEmployeeParms = new Dictionary<string, string>();

        /// <summary>

        /// 人员顺序号

        /// </summary>

        public static ConcurrentQueue<int> queueSznyEmployeeInfo = new ConcurrentQueue<int>();

        public static ConcurrentQueue<int> queueSuccessEmployeeInfo = new ConcurrentQueue<int>();

　　　　public static bool SznyEmployeeList(Action<string> SuccessCallback, Action<string> FailCallback)

        {

            string url = $"http://127.0.0.1/HumanResources/EmployeeManage/EmployeeInfoList.aspx";

            string msg = Get(url, SuccessCallback, FailCallback);

            if (msg.Trim().Length > )

            {

                //统计参数

                //__doPostBack\('(?<name>[^']*?)'

                //new Regex(@"__doPostBack\('(?<name>[^']*?)'", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture)

                string name = "";

                MatchCollection mc = Regex.Matches(msg, @"__doPostBack\('(?<name>[^']*?)'", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture);

                foreach (Match mi in mc)

                {

                    name = mi.Groups["name"].Value.Trim();

                    break;

                }

                //(?<=<a[^<>]*?href="javascript:__dopostback\()[^<>]*?(?=,[^<>]*?\)"[^<>]*?>条/页)

                //new Regex(@"(?<=<a[^<>]*?href=""javascript:__dopostback\()[^<>]*?(?=,[^<>]*?\)""[^<>]*?>条/页)", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture)

                string smname = "";

                Match m = Regex.Match(msg, @"(?<=<a[^<>]*?href=""javascript:__dopostback\()[^<>]*?(?=,[^<>]*?\)""[^<>]*?>条/页)", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture);

                if (m.Success)

                    smname = m.Value.Trim().Replace("'", "").Replace("'", "");

                //<input[^<>]*?name="(?<name>[^"]*?)"[^<>]*?value="(?<val>[^"]*?)"[^<>]*?/?>|<input[^<>]*?name="(?<name>[^"]*?)"[^<>]*?"[^<>]*?/?>|<select[^<>]*?name="(?<name>[^"]*?)"[^<>]*?"[^<>]*?/?>

                //new Regex(@"<input[^<>]*?name=""(?<name>[^""]*?)""[^<>]*?value=""(?<val>[^""]*?)""[^<>]*?/?>|<input[^<>]*?name=""(?<name>[^""]*?)""[^<>]*?""[^<>]*?/?>|<select[^<>]*?name=""(?<name>[^""]*?)""[^<>]*?""[^<>]*?/?>", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture)

                Dictionary<string, string> dicParms = new Dictionary<string, string>();

                dicParms.Add("ScriptManager1", $"UpdatePanel1|{smname}");

                dicParms.Add("__EVENTTARGET", smname);

                dicParms.Add("__EVENTARGUMENT", "");

                dicParms.Add("__VIEWSTATE", "");

                dicParms.Add("__EVENTVALIDATION", "");

                dicParms.Add("MdGridView_t_unitemployees_dwyg_GridViewID", $"{name}");

                dicParms.Add("MdGridView_t_unitemployees_dwyg_iCurrentPage", "");

                dicParms.Add("MdGridView_t_unitemployees_dwyg_iTotalPage", "");

                dicParms.Add("MdGridView_t_unitemployees_dwyg_iTotalCount", "");

                dicParms.Add("MdGridView_t_unitemployees_dwyg_iPageSize", "");

                dicParms.Add("MdGridView_t_unitemployees_dwyg_iPageCount", "");

                dicParms.Add("MdGridView_t_unitemployees_dwyg_iCurrentNum", "");

                dicParms.Add("XM", "ZXMCHECK");

                List<string> lstParms = new List<string>() { "XM", "MdGridView_t_unitemployees_dwyg_iCurrentPage", "MdGridView_t_unitemployees_dwyg_GridViewID", "MdGridView_t_unitemployees_dwyg_iCurrentNum", "MdGridView_t_unitemployees_dwyg_iPageCount", "MdGridView_t_unitemployees_dwyg_iPageSize", "Button_Query", "__EVENTTARGET", "__EVENTARGUMENT", "Button_SelQuery", "Button_view", "Button_edit", "Button_out", "ImageButton_Tx", "ImageButton_xx1", "Button_qd", "MdGridView_t_unitemployees_dwyg_GridViewID", "__ASYNCPOST", "MdGridView_t_unitemployees_dwyg__PageSetText" };

                mc = Regex.Matches(msg, @"<input[^<>]*?name=""(?<name>[^""]*?)""[^<>]*?value=""(?<val>[^""]*?)""[^<>]*?/?>|<input[^<>]*?name=""(?<name>[^""]*?)""[^<>]*?""[^<>]*?/?>|<select[^<>]*?name=""(?<name>[^""]*?)""[^<>]*?""[^<>]*?/?>", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture);

                foreach (Match mi in mc)

                {

                    if (lstParms.Contains(mi.Groups["name"].Value.Trim()))

                        continue;

                    if (dicParms.ContainsKey(mi.Groups["name"].Value.Trim()))

                        dicParms[mi.Groups["name"].Value.Trim()] = mi.Groups["val"].Value.Trim();

                    else

                        dicParms.Add(mi.Groups["name"].Value.Trim(), mi.Groups["val"].Value.Trim());

                }

                if (dicParms.ContainsKey("MdGridView_t_unitemployees_dwyg$_PageSetText"))

                    dicParms["MdGridView_t_unitemployees_dwyg$_PageSetText"] = "";

                else

                    dicParms.Add("MdGridView_t_unitemployees_dwyg$_PageSetText", "");//1200条 每页

                msg = Post(url, dicParms, SuccessCallback, FailCallback);

                dicSznyEmployees.Clear();

                dicSznyEmployeeParms.Clear();

                dicSznyEmployeeParms.Clear();

                dicSznyEmployeeParms.Add("__EVENTTARGET", "");

                dicSznyEmployeeParms.Add("__EVENTARGUMENT", "");

                dicSznyEmployeeParms.Add("__VIEWSTATE", dicParms["__VIEWSTATE"]);

                dicSznyEmployeeParms.Add("__EVENTVALIDATION", dicParms["__EVENTVALIDATION"]);

                dicSznyEmployeeParms.Add("MdGridView_t_unitemployees_dwyg_GridViewID", $"{name}");

                dicSznyEmployeeParms.Add("MdGridView_t_unitemployees_dwyg_iCurrentPage", "");

                dicSznyEmployeeParms.Add("MdGridView_t_unitemployees_dwyg_iTotalPage", "");

                dicSznyEmployeeParms.Add("MdGridView_t_unitemployees_dwyg_iTotalCount", "");

                dicSznyEmployeeParms.Add("MdGridView_t_unitemployees_dwyg_iPageSize", "");

                dicSznyEmployeeParms.Add("MdGridView_t_unitemployees_dwyg_iPageCount", "");

                dicSznyEmployeeParms.Add("MdGridView_t_unitemployees_dwyg_iCurrentNum", "");

                dicSznyEmployeeParms.Add("XM", "ZXMCHECK");

                lstParms.Clear();

                lstParms = new List<string>() { "XM", "__EVENTTARGET", "__EVENTARGUMENT", "Button_Query", "Button_SelQuery", };

                lstParms.Add("Button_edit");

                lstParms.Add("Button_out");

                lstParms.Add("ImageButton_Tx");

                lstParms.Add("ImageButton_xx1");

                lstParms.Add("Button_qd");

                lstParms.Add("MdGridView_t_unitemployees_dwyg_GridViewID");

                lstparms.add("mdgridview_t_unitemployees_dwyg_icurrentpage");

                lstparms.add("mdgridview_t_unitemployees_dwyg_itotalpage");

                lstparms.add("mdgridview_t_unitemployees_dwyg_itotalcount");

                lstparms.add("mdgridview_t_unitemployees_dwyg_ipagesize");

                lstparms.add("mdgridview_t_unitemployees_dwyg_ipagecount");

                lstParms.Add("MdGridView_t_unitemployees_dwyg_iCurrentNum");

                mc = Regex.Matches(msg, @"<input[^<>]*?name=[""'](?<name>[^""']*?)[""'][^<>]*?value=[""'](?<val>[^'""]*?)[""'][^<>]*?/?>|<input[^<>]*?name=[""'](?<name>[^'""]*?)[""'][^<>]*?[""'][^<>]*?/?>|<select[^<>]*?name=[""'](?<name>[^""']*?)[""'][^<>]*?[""'][^<>]*?/?>", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture);

                foreach (Match mi in mc)

                {

                    if (lstParms.Contains(mi.Groups["name"].Value.Trim()))

                        continue;

                    if (dicSznyEmployeeParms.ContainsKey(mi.Groups["name"].Value.Trim()))

                        dicSznyEmployeeParms[mi.Groups["name"].Value.Trim()] = mi.Groups["val"].Value.Trim();

                    else

                        dicSznyEmployeeParms.Add(mi.Groups["name"].Value.Trim(), mi.Groups["val"].Value.Trim());

                }

                int cnt = int.Parse(dicSznyEmployeeParms["MdGridView_t_unitemployees_dwyg_iTotalCount"]);

                for (int i = ; i <= cnt; i++)

                    queueSznyEmployeeInfo.Enqueue(i);

                //获取TR

                //< tr[^<>] *? name = "SelectTR"[^<>] *?>.*?</ tr >

                //new Regex(@"<tr[^<>]*?name=""SelectTR""[^<>]*?>.*?</tr>", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture)

                mc = Regex.Matches(msg, @"<tr[^<>]*?name=""SelectTR""[^<>]*?>.*?</tr>", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture);

                foreach (Match mi in mc)

                {

                    //获取td

                    //(?<=<td[^<>]*?>).*?(?=</td>)

                    //new Regex("(?<=<td[^<>]*?>).*?(?=</td>)", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture)

                    MatchCollection mic = Regex.Matches(mi.Value, "(?<=<td[^<>]*?>).*?(?=</td>)", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture);

                    int ix = int.Parse(mic[].Value.Trim());

                    if (!dicSznyEmployees.ContainsKey(ix))

                    {

                        dicSznyEmployees.Add(ix, new Dictionary<string, string>());

                    }

                    queueSznyEmployeeInfo.Enqueue(ix);

                    dicSznyEmployees[ix].Add("UserName", mic[].Value.Trim().Replace("&nbsp;", ""));

                    dicSznyEmployees[ix].Add("PersonID", mic[].Value.Trim().Replace("&nbsp;", ""));

                    dicSznyEmployees[ix].Add("Birthday", mic[].Value.Trim().Replace("&nbsp;", ""));

                    dicSznyEmployees[ix].Add("Sex", mic[].Value.Trim().Replace("&nbsp;", ""));

                    dicSznyEmployees[ix].Add("HomePhone", mic[].Value.Trim().Replace("&nbsp;", ""));

                    dicSznyEmployees[ix].Add("TelPhone", mic[].Value.Trim().Replace("&nbsp;", ""));

                    dicSznyEmployees[ix].Add("Mail", mic[].Value.Trim().Replace("&nbsp;", ""));

                    dicSznyEmployees[ix].Add("Address", mic[].Value.Trim().Replace("&nbsp;", ""));

                    dicSznyEmployees[ix].Add("MinZu", mic[].Value.Trim().Replace("&nbsp;", ""));

                    dicSznyEmployees[ix].Add("AddressJiGuan", mic[].Value.Trim().Replace("&nbsp;", ""));

                    dicSznyEmployees[ix].Add("ZhengZhiMianmao", mic[].Value.Trim().Replace("&nbsp;", ""));

                    dicSznyEmployees[ix].Add("Paiqianshijian", mic[].Value.Trim().Replace("&nbsp;", ""));

                    dicSznyEmployees[ix].Add("Remark", mic[].Value.Trim().Replace("&nbsp;", ""));

                }

            }

            return true;

        }

这样所有的人员信息一次性采集到静态变量字典中了，剩下的一个工号可以慢慢获取了。

既然是这样，老实的分析Post数据，按照格式Post数据把。

分析完Post的数据后，突发奇想，我是不是可以通过相同的__ViewState和__EVENTVALIDATION POST数据呢？说干就干。

写代码跳转到员工列表页面，然后POST数据设置一页显示所有数据。

所有的POST的参数，保存到一个静态变量中。

发现POST批量提交的时候，前3次正常，以后就直接未登录。

果断放弃，换思路。

那如果这样不行可不可以把所有的数据放到一个页面上，然后每次获取一次页面，然后根据顺序号POST数据呢。

上面已经把所有的列表数据都采集完了，顺序号也固定了，然后在POST数据的时候，发现有的人员和工号不对应。

这时候去分析为什么数据会出现不对应的情况呢？发现正则表达式写的还有问题。获取页面的Input的时候，属性有可能使用双引号，也有可能使用单引号。

正则表达式由原来的

<input[^<>]*?name="(?<name>[^"]*?)"[^<>]*?value="(?<val>[^"]*?)"[^<>]*?/?>|<input[^<>]*?name="(?<name>[^"]*?)"[^<>]*?"[^<>]*?/?>|<select[^<>]*?name="(?<name>[^"]*?)"[^<>]*?"[^<>]*?/?>

修改为

<input[^<>]*?name=["'](?<name>[^"']*?)["'][^<>]*?value=["'](?<val>[^'"]*?)["'][^<>]*?/?>|<input[^<>]*?name=["'](?<name>[^'"]*?)["'][^<>]*?["'][^<>]*?/?>|<select[^<>]*?name=["'](?<name>[^"']*?)["'][^<>]*?["'][^<>]*?/?>

由于网站异步提交，也就是以前WEBForm采用的ScriptManager,提交的时候返回的HTML不是整个Document,没有注意，以为没有返回__ViewState。所以采用GET的时候获取的__ViewState继续执行获取工号的操作。发现获取的工号都是错误，人员与工号对不上

麻爪了，不知道该咋办了。犹豫了一下后，上Fiddler吧，一点点的看提交的参数是否有区别。发现正常网站在Get到页面后，通过调整每页x条数据后，提交的ViewState与原来的不一致。寻寻觅觅觅觅寻寻最后发现异步返回的HTML中，最后有ViewState….

由于返回的数据顺序，每次也不一样，也是造成人员、工号不一致的原因。

提交后正常了，但是1000多条的员工信息，每次提交都是2000多个参数。看着冗长的POST数据，无语了。这样提交先不说网站本身就慢。我提交这么多网站会不会更慢，我的系统是不是也会更慢。

怎么办？

是不是有可能把分页设置成每页只有一条数据，然后每次翻页，采集数据。简单试试把

先修改获取列表页面数据，把数据设置成一条每页，此时不再采集列表中的信息。而是记录总共多少页，放入队列中，共定时任务去分页采集数据。列表信息通过后面的分页数据采集。

由于网站是内部系统，为了不影响系统的正常运行，每次只采集一条信息，等待这条信息采集完成后，在采集下一页信息。

采集列表

　　　　　public static void ReqSznyEmployeeList(int ix,Action<string> SuccessCallback, Action<string> FailCallback)

        {

            string url = $"http://127.0.0.1/HumanResources/EmployeeManage/EmployeeInfoList.aspx";

            HttpWebRequest req = WebRequest.Create(url) as HttpWebRequest;

            req.Method = "GET";

            req.UserAgent = "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36";

            req.Accept = "*/*";

            req.KeepAlive = true;

            req.ServicePoint.ConnectionLimit = int.MaxValue;

            req.ServicePoint.Expect100Continue = false;

            req.CookieContainer = sznyCookie;

            req.Credentials = System.Net.CredentialCache.DefaultCredentials;

            req.BeginGetResponse(new AsyncCallback(RspSznyEmployeeList), new object[] { req, url,ix, SuccessCallback, FailCallback });

        }

　　　　　private static void RspSznyEmployeeList(IAsyncResult result)

        {

            object[] parms = result.AsyncState as object[];

            HttpWebRequest req = parms[] as HttpWebRequest;

            string url = parms[].ToString();

            int ix = int.Parse(parms[].ToString());

            Action<string> SuccessCallback = parms[] as Action<string>;

            Action<string> FailCallback = parms[] as Action<string>;

            try

            {

                using (HttpWebResponse rsp = req.EndGetResponse(result) as HttpWebResponse)

                {

                    using (StreamReader reader = new StreamReader(rsp.GetResponseStream()))

                    {

                        string msg = "";

                        msg = reader.ReadToEnd();

                        //统计参数

                        //__doPostBack\('(?<name>[^']*?)'

                        //new Regex(@"__doPostBack\('(?<name>[^']*?)'", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture)

                        string name = "";

                        MatchCollection mc = Regex.Matches(msg, @"__doPostBack\('(?<name>[^']*?)'", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture);

                        foreach (Match mi in mc)

                        {

                            name = mi.Groups["name"].Value.Trim();

                            break;

                        }

                        //(?<=<a[^<>]*?href="javascript:__dopostback\()[^<>]*?(?=,[^<>]*?\)"[^<>]*?>条/页)

                        //new Regex(@"(?<=<a[^<>]*?href=""javascript:__dopostback\()[^<>]*?(?=,[^<>]*?\)""[^<>]*?>条/页)", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture)

                        string smname = "MdGridView_t_unitemployees_dwyg$_SearchGo";

                        //Match m = Regex.Match(msg, @"(?<=<a[^<>]*?href=""javascript:__dopostback\()[^<>]*?(?=,[^<>]*?\)""[^<>]*?>条/页)", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture);

                        //<input[^<>]*?name=["'](?<name>[^"']*?)["'][^<>]*?value=["'](?<val>[^'"]*?)["'][^<>]*?/?>|<input[^<>]*?name=["'](?<name>[^'"]*?)["'][^<>]*?["'][^<>]*?/?>|<select[^<>]*?name=["'](?<name>[^"']*?)["'][^<>]*?["'][^<>]*?/?>

                        //new Regex(@"<input[^<>]*?name=[""'](?<name>[^""']*?)[""'][^<>]*?value=[""'](?<val>[^'""]*?)[""'][^<>]*?/?>|<input[^<>]*?name=[""'](?<name>[^'""]*?)[""'][^<>]*?[""'][^<>]*?/?>|<select[^<>]*?name=[""'](?<name>[^""']*?)[""'][^<>]*?[""'][^<>]*?/?>", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture)

                        Dictionary<string, string> dicParms = new Dictionary<string, string>();

                        dicParms.Add("ScriptManager1", $"UpdatePanel1|{smname}");

                        dicParms.Add("__EVENTTARGET", smname);

                        dicParms.Add("__EVENTARGUMENT", "");

                        dicParms.Add("__VIEWSTATE", "");

                        dicParms.Add("__EVENTVALIDATION", "");

                        dicParms.Add("MdGridView_t_unitemployees_dwyg_GridViewID", $"{name}");

                        dicParms.Add("MdGridView_t_unitemployees_dwyg_iCurrentPage", ix.ToString());

                        dicParms.Add("MdGridView_t_unitemployees_dwyg_iTotalPage", "");

                        dicParms.Add("MdGridView_t_unitemployees_dwyg_iTotalCount", "");

                        dicParms.Add("MdGridView_t_unitemployees_dwyg_iPageSize", "");

                        dicParms.Add("MdGridView_t_unitemployees_dwyg_iPageCount", "");

                        dicParms.Add("MdGridView_t_unitemployees_dwyg_iCurrentNum", "");

                        //dicParms.Add("MdGridView_t_unitemployees_dwyg$_SearchTextBox", ix.ToString());

                        dicParms.Add("XM", "ZXMCHECK");

                        List<string> lstParms = new List<string>() { "ScriptManager1", "XM", "MdGridView_t_unitemployees_dwyg_iCurrentNum",  "Button_Query", "__EVENTTARGET", "__EVENTARGUMENT", "Button_SelQuery", "Button_view", "Button_edit", "Button_out", "ImageButton_Tx", "ImageButton_xx1", "Button_qd",  "__ASYNCPOST", "MdGridView_t_unitemployees_dwyg__PageSetText" };

                        mc = Regex.Matches(msg, @"<input[^<>]*?name=[""'](?<name>[^""']*?)[""'][^<>]*?value=[""'](?<val>[^'""]*?)[""'][^<>]*?/?>|<input[^<>]*?name=[""'](?<name>[^'""]*?)[""'][^<>]*?[""'][^<>]*?/?>|<select[^<>]*?name=[""'](?<name>[^""']*?)[""'][^<>]*?[""'][^<>]*?/?>", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture);

                        foreach (Match mi in mc)

                        {

                            if (lstParms.Contains(mi.Groups["name"].Value.Trim()))

                                continue;

                            if (dicParms.ContainsKey(mi.Groups["name"].Value.Trim()))

                                dicParms[mi.Groups["name"].Value.Trim()] = mi.Groups["val"].Value.Trim();

                            else

                                dicParms.Add(mi.Groups["name"].Value.Trim(), mi.Groups["val"].Value.Trim());

                        }

                        if (dicParms.ContainsKey("MdGridView_t_unitemployees_dwyg$_PageSetText"))

                            dicParms["MdGridView_t_unitemployees_dwyg$_PageSetText"] = "";

                        else

                            dicParms.Add("MdGridView_t_unitemployees_dwyg$_PageSetText", "");//1200条 每页

                        if (dicParms.ContainsKey("MdGridView_t_unitemployees_dwyg_iPageCount"))

                            dicParms["MdGridView_t_unitemployees_dwyg_iPageCount"] = "";

                        else

                            dicParms.Add("MdGridView_t_unitemployees_dwyg_iPageCount", "");

                        if (dicParms.ContainsKey("MdGridView_t_unitemployees_dwyg_iPageSize"))

                            dicParms["MdGridView_t_unitemployees_dwyg_iPageSize"] = "";

                        else

                            dicParms.Add("MdGridView_t_unitemployees_dwyg_iPageSize", "");

                        if (dicParms.ContainsKey("MdGridView_t_unitemployees_dwyg$_SearchTextBox"))

                            dicParms["MdGridView_t_unitemployees_dwyg$_SearchTextBox"] = $"{ix}";

                        else

                            dicParms.Add("MdGridView_t_unitemployees_dwyg$_SearchTextBox", $"{ix}");/*第几页*/

                        dicParms["MdGridView_t_unitemployees_dwyg_iTotalPage"] = dicParms["MdGridView_t_unitemployees_dwyg_iTotalCount"];

                        msg = Post(url, dicParms, SuccessCallback, FailCallback);

                        //获取TR

                        //<tr[^<>]*?name="SelectTR"[^<>]*?>.*?</tr>

                        //new Regex(@"<tr[^<>]*?name=""SelectTR""[^<>]*?>.*?</tr>", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture)

                        mc = Regex.Matches(msg, @"<tr[^<>]*?name=""SelectTR""[^<>]*?>.*?</tr>", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture);

                        foreach (Match mi in mc)

                        {

                            //获取td

                            //(?<=<td[^<>]*?>).*?(?=</td>)

                            //new Regex("(?<=<td[^<>]*?>).*?(?=</td>)", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture)

                            MatchCollection mic = Regex.Matches(mi.Value, "(?<=<td[^<>]*?>).*?(?=</td>)", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture);

                            if (!dicSznyEmployees.ContainsKey(ix))

                            {

                                dicSznyEmployees.Add(ix, new Dictionary<string, string>());

                            }

                            //queueSznyEmployeeInfo.Enqueue(ix);

                            if (!dicSznyEmployees[ix].ContainsKey("UserName"))

                                dicSznyEmployees[ix].Add("UserName", mic[].Value.Trim().Replace("&nbsp;", ""));

                            else

                                dicSznyEmployees[ix]["UserName"] = mic[].Value.Trim().Replace("&nbsp;", "");

                            if (!dicSznyEmployees[ix].ContainsKey("PersonID"))

                                dicSznyEmployees[ix].Add("PersonID", mic[].Value.Trim().Replace("&nbsp;", ""));

                            else

                                dicSznyEmployees[ix]["PersonID"] = mic[].Value.Trim().Replace("&nbsp;", "");

                            if (!dicSznyEmployees[ix].ContainsKey("Birthday"))

                                dicSznyEmployees[ix].Add("Birthday", mic[].Value.Trim().Replace("&nbsp;", ""));

                            else

                                dicSznyEmployees[ix]["Birthday"] = mic[].Value.Trim().Replace("&nbsp;", "");

                            if (!dicSznyEmployees[ix].ContainsKey("Sex"))

                                dicSznyEmployees[ix].Add("Sex", mic[].Value.Trim().Replace("&nbsp;", ""));

                            else

                                dicSznyEmployees[ix]["Sex"] = mic[].Value.Trim().Replace("&nbsp;", "");

                            if (!dicSznyEmployees[ix].ContainsKey("HomePhone"))

                                dicSznyEmployees[ix].Add("HomePhone", mic[].Value.Trim().Replace("&nbsp;", ""));

                            else

                                dicSznyEmployees[ix]["HomePhone"] = mic[].Value.Trim().Replace("&nbsp;", "");

                            if (!dicSznyEmployees[ix].ContainsKey("TelPhone"))

                                dicSznyEmployees[ix].Add("TelPhone", mic[].Value.Trim().Replace("&nbsp;", ""));

                            else

                                dicSznyEmployees[ix]["TelPhone"] = mic[].Value.Trim().Replace("&nbsp;", "");

                            if (!dicSznyEmployees[ix].ContainsKey("Mail"))

                                dicSznyEmployees[ix].Add("Mail", mic[].Value.Trim().Replace("&nbsp;", ""));

                            else

                                dicSznyEmployees[ix]["Mail"] = mic[].Value.Trim().Replace("&nbsp;", "");

                            if (!dicSznyEmployees[ix].ContainsKey("Address"))

                                dicSznyEmployees[ix].Add("Address", mic[].Value.Trim().Replace("&nbsp;", ""));

                            else

                                dicSznyEmployees[ix]["Address"] = mic[].Value.Trim().Replace("&nbsp;", "");

                            if (!dicSznyEmployees[ix].ContainsKey("MinZu"))

                                dicSznyEmployees[ix].Add("MinZu", mic[].Value.Trim().Replace("&nbsp;", ""));

                            else

                                dicSznyEmployees[ix]["MinZu"] = mic[].Value.Trim().Replace("&nbsp;", "");

                            if (!dicSznyEmployees[ix].ContainsKey("AddressJiGuan"))

                                dicSznyEmployees[ix].Add("AddressJiGuan", mic[].Value.Trim().Replace("&nbsp;", ""));

                            else

                                dicSznyEmployees[ix]["AddressJiGuan"] = mic[].Value.Trim().Replace("&nbsp;", "");

                            if (!dicSznyEmployees[ix].ContainsKey("ZhengZhiMianmao"))

                                dicSznyEmployees[ix].Add("ZhengZhiMianmao", mic[].Value.Trim().Replace("&nbsp;", ""));

                            else

                                dicSznyEmployees[ix]["ZhengZhiMianmao"] = mic[].Value.Trim().Replace("&nbsp;", "");

                            if (!dicSznyEmployees[ix].ContainsKey("Paiqianshijian"))

                                dicSznyEmployees[ix].Add("Paiqianshijian", mic[].Value.Trim().Replace("&nbsp;", ""));

                            else

                                dicSznyEmployees[ix]["Paiqianshijian"] = mic[].Value.Trim().Replace("&nbsp;", "");

                            if (!dicSznyEmployees[ix].ContainsKey("Remark"))

                                dicSznyEmployees[ix].Add("Remark", mic[].Value.Trim().Replace("&nbsp;", ""));

                            else

                                dicSznyEmployees[ix]["Remark"] = mic[].Value.Trim().Replace("&nbsp;", "");

                        }

                        dicParms.Clear();

                        mc = Regex.Matches(msg, @"(?<name>__VIEWSTATE)\|(?<v>[^\|]+)|(?<name>__EVENTVALIDATION)\|(?<v>[^\|]+)", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture);

                        foreach (Match mi in mc)

                        {

                            dicParms.Add(mi.Groups["name"].Value.Trim(), mi.Groups["v"].Value.Trim());

                        }

                        dicParms.Add("HiddenField_param", "");

                        dicParms.Add("__EVENTTARGET", "");

                        dicParms.Add("__EVENTARGUMENT", "");

                        dicParms.Add("MdGridView_t_unitemployees_dwyg_GridViewID", $"{name}");

                        dicParms.Add("MdGridView_t_unitemployees_dwyg_iCurrentPage", ix.ToString());

                        dicParms.Add("MdGridView_t_unitemployees_dwyg_iTotalPage", "");

                        dicParms.Add("MdGridView_t_unitemployees_dwyg_iTotalCount", "");

                        dicParms.Add("MdGridView_t_unitemployees_dwyg_iPageSize", "");

                        dicParms.Add("MdGridView_t_unitemployees_dwyg_iPageCount", "");

                        dicParms.Add("MdGridView_t_unitemployees_dwyg_iCurrentNum", "");

                        dicParms.Add("XM", "ZXMCHECK");

                        lstParms.Clear();

                        lstParms = new List<string>() { "XM", "__EVENTTARGET", "__EVENTARGUMENT", "Button_Query", "Button_SelQuery", };

                        lstParms.Add("Button_edit");

                        lstParms.Add("Button_out");

                        lstParms.Add("ImageButton_Tx");

                        lstParms.Add("ImageButton_xx1");

                        lstParms.Add("Button_qd");

                        mc = Regex.Matches(msg, @"<input[^<>]*?name=[""'](?<name>[^""']*?)[""'][^<>]*?value=[""'](?<val>[^'""]*?)[""'][^<>]*?/?>|<input[^<>]*?name=[""'](?<name>[^'""]*?)[""'][^<>]*?[""'][^<>]*?/?>|<select[^<>]*?name=[""'](?<name>[^""']*?)[""'][^<>]*?[""'][^<>]*?/?>", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture);

                        foreach (Match mi in mc)

                        {

                            if (lstParms.Contains(mi.Groups["name"].Value.Trim()))

                                continue;

                            if (dicParms.ContainsKey(mi.Groups["name"].Value.Trim()))

                                dicParms[mi.Groups["name"].Value.Trim()] = mi.Groups["val"].Value.Trim();

                            else

                                dicParms.Add(mi.Groups["name"].Value.Trim(), mi.Groups["val"].Value.Trim());

                        }

                        ReqSznyEmployeeInfo(ix, dicParms, SuccessCallback, FailCallback);

                    }

                }

            }

            catch (Exception ex) {

                Business.queueSznyEmployeeInfo.Enqueue(ix);

                Business.queueMsg.Enqueue($"{DateTime.Now.ToString("yyy-MM-dd HH:mm:ss")}{ex.Message}");

            }

        }

获取工号

　　　　public static void ReqSznyEmployeeInfo(int ix,Dictionary<string,string> dicParms, Action<string> SuccessCallback, Action<string> FailCallback) {

            StringBuilder data = new StringBuilder();

            foreach (var kv in dicParms)

            {

                if (kv.Key.StartsWith("header"))

                    continue;

                data.Append($"&{Common.UrlEncode(kv.Key, Encoding.UTF8)}={ Common.UrlEncode(kv.Value, Encoding.UTF8)}");

            }

            if (data.Length > )

                data.Remove(, );

            HttpWebRequest req = WebRequest.Create("http://127.0.0.1/HumanResources/EmployeeManage/EmployeeInfoList.aspx") as HttpWebRequest;

            req.Method = "POST";

            req.KeepAlive = true;

            req.CookieContainer = sznyCookie;

            req.ContentType = "application/x-www-form-urlencoded";

            req.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9";

            if (dicParms.ContainsKey("ScriptManager1"))

            {

                req.Headers.Add("X-MicrosoftAjax", "Delta=true");

                req.Headers.Add("X-Requested-With", "XMLHttpRequest");

                req.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";

                req.Accept = "*/*";

            }

            req.Headers.Add("Cache-Control", "max-age=0");

            req.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.163 Safari/537.36";

            req.ServicePoint.ConnectionLimit = int.MaxValue;

            req.ServicePoint.Expect100Continue = false;

            req.AllowAutoRedirect = true;

            req.Credentials = System.Net.CredentialCache.DefaultCredentials;

            byte[] buffer = Encoding.UTF8.GetBytes(data.ToString());

            using (Stream reqStream = req.GetRequestStream())

            {

                reqStream.Write(buffer, , buffer.Length);

            }

            req.BeginGetResponse(new AsyncCallback(RspSznyEmployeeInfo), new object[] { req,ix, dicParms, SuccessCallback, FailCallback });

        }

        private static void RspSznyEmployeeInfo(IAsyncResult result)

        {

            object[] parms = result.AsyncState as object[];

            HttpWebRequest req = parms[] as HttpWebRequest;

            int ix =int.Parse( parms[].ToString());

            Dictionary<string, string> dicParms = parms[] as Dictionary<string, string>;

            Action<string> SuccessCallback = parms[] as Action<string>;

            Action<string> FailCallback = parms[] as Action<string>;

            try

            {

                using (HttpWebResponse rsp = req.EndGetResponse(result) as HttpWebResponse)

                {

                    using (StreamReader reader = new StreamReader(rsp.GetResponseStream()))

                    {

                        string msg = "";

                        msg = reader.ReadToEnd();

                        string code = "无";

                        //<input[^<>]*?name\s*?=\s*?["']TextBox_YG_Code_str["'][^<>]*?value\s*?=\s*?["'](?<code>[^"']*?)["']|<input[^<>]*?value\s*?=\s*?["'](?<code>[^"']*?)["'][^<>]*?name\s*?=\s*?["']TextBox_YG_Code_str["']

                        //new Regex(@"<input[^<>]*?name\s*?=\s*?[""']TextBox_YG_Code_str[""'][^<>]*?value\s*?=\s*?[""'](?<code>[^""']*?)[""']|<input[^<>]*?value\s*?=\s*?[""'](?<code>[^""']*?)[""'][^<>]*?name\s*?=\s*?[""']TextBox_YG_Code_str[""']", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture)

                        Match m = Regex.Match(msg, @"<input[^<>]*?name\s*?=\s*?[""']TextBox_YG_Code_str[""'][^<>]*?value\s*?=\s*?[""'](?<code>[^""']*?)[""']|<input[^<>]*?value\s*?=\s*?[""'](?<code>[^""']*?)[""'][^<>]*?name\s*?=\s*?[""']TextBox_YG_Code_str[""']", RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture);

                        if (m.Success)

                            code = m.Groups["code"].Value.Trim();

                        if (dicSznyEmployees[ix].ContainsKey("Code"))

                            dicSznyEmployees[ix]["Code"] = code;

                        else

                            dicSznyEmployees[ix].Add("Code", code);

                        queueSuccessEmployeeInfo.Enqueue(ix);

                    }

                }

            }

            catch (Exception ex) {

                Business.queueSznyEmployeeInfo.Enqueue(ix);

                Business.queueMsg.Enqueue($"{DateTime.Now.ToString("yyy-MM-dd HH:mm:ss")}{ex.Message}");

            }

        }

入库

采集到的信息，通过定时任务保存到数据库。

　　　　　　　　Task.Factory.StartNew(() => {

                  while (true) {

                    if (Business.queueSuccessEmployeeInfo.Count <= ) {

                        Thread.Sleep();

                        continue;

                    }

                    List<Dictionary<string, string>> lst = new List<Dictionary<string, string>>();

                    while (Business.queueSuccessEmployeeInfo.Count > ) {

                        Business.queueSuccessEmployeeInfo.TryDequeue(out int ix);

                        lst.Add(Business.dicSznyEmployees[ix]);

                        if (lst.Count >= )

                            break;

                    }

                    DbAccess.AddTran(lst, "SznyEmployee",new List<string>() { "UserName", "PersonID" });

                    Thread.Sleep();

                }

            });

总结

采集的时候，为了能利用已经采集到的信息，而不是重复采集，在采集的时候对数据库数据进行判断是否存在。纯粹是为了提高效率，WebForm的网站真是太慢，太慢了

以前写异步纯粹是为了提高线程效率，在.NET中感觉不到快乐。

终于搞定了，数据已经成功入库了。

.NET的没落也是有原因的，网站的速度的确是慢，.net押宝.net core的新体验了。

我讨厌采集WEBForm网站，写了这么久的爬虫，祈祷永远不要在碰到WEBFORM了。

秀一下结果庆祝一下把

巴特西

爬虫系列一次采集.NET WebForm网站的坎坷历程

先准备下一个GET/POST预备使用

登陆

抓取人员信息

采集列表

获取工号

入库

总结

最新文章

热门文章

巴特西

爬虫系列 一次采集.NET WebForm网站的坎坷历程

先准备下一个GET/POST预备使用

登陆

抓取人员信息

采集列表

获取工号

入库

总结

最新文章

热门文章

爬虫系列一次采集.NET WebForm网站的坎坷历程