通过winform+模拟登录实现快速一键登录到人才招聘网站

之前为了便于人事部门招聘登录网站更简洁高效，免去每天频繁输网址、用户名、密码等相关登录信息，特基于winform+HttpWebRequest实现模拟请求登录，最终达到一键登录到招聘网站后台的效果。

要实现一键登录到各大人才招聘网站就必需先了解网站的登录步骤即原理，然后通过代码一步步模拟实现即可。

通过我对前程无忧、中国人才热线、中华英才网三个网站的登录研究，找出基本相同的以下几个步聚：

1.请求登录主页面，然后获取隐藏域的字段信息；

2.构建登录请求数据，有的网站是form表单请求，有的网站是：json请求

3.请求后获取到登录的Cookie，然后通过设置IE的Cookie，最后打开IE浏览器及指定的管理后台地址即可。

除了上述三大步骤以外，其实还涉及一个重要的知识点，那就是：C#调用javascript脚本并获得执行的结果，因为各网站中有用到js生成的加密数据，而这些js加密方法我们无法直接联想到对应的c#方法，故必需采用js方法获取加密数据，这个在本文后面我会讲解几种方法。

上面已经分析了一键登录到人才招聘网站的原理，下面就分别贴出：前程无忧、中国人才热线、这二个网站的登录实现代码，并作简要说明，以便大家学习与参考：

（PS:注意实现一键登录只是为了便于人事提高网站的使用效率，请不要利用我的代码作非法的事情，否则后果自负，同时也不排除后续这些网站会改变登录方式，那么这些登录就都会失效的）

登录中国人才热线：HttpLoginCjolHelper

    public class HttpLoginCjolHelper{private static readonly CodeDomProvider _provider = new Microsoft.JScript.JScriptCodeProvider();private CookieContainer cjolCookies = new CookieContainer();public string Login(string loginName, string loginPassword){string validateCode, codekey;validateCode = GetValidateCode(out codekey);if (string.IsNullOrEmpty(validateCode)) return null;var rs = HttpPost("http://newrms.cjol.com/Account/HrLogin", new Dictionary<string, object> { { "r_u_name", loginName }, { "r_p_word", loginPassword }, { "r_v_code", validateCode },{ "r_v_codekey", codekey }});string newUrl = rs.Headers["Location"].ToString();if (newUrl.IndexOf("/Default") < 0 && newUrl.IndexOf("message") > 0){string pattren = "(?<=message=).+$";var regx = new System.Text.RegularExpressions.Regex(pattren);string errMsg = regx.Match(newUrl).Value;return Uri.UnescapeDataString(errMsg);}//if (!newUrl.StartsWith("http://" + rs.ResponseUri.Host))//{//    newUrl = string.Format("http://{0}{1}", rs.ResponseUri.Host, newUrl);//}newUrl = "http://newrms.cjol.com/searchengine";//var jr = GetResponseContent(rs);BaseUtil.OpenAdminPage(cjolCookies, new Uri(newUrl));return null;}private HttpWebResponse HttpPost(string url, Dictionary<string, object> postData){string desKey = "!@#$%26)(*&^cjol<16>:|}{=-/*-+.CJOL@*&^%*()*<299>";string logindataVal = HttpLoginCjolHelper.JScriptRun("jsencrypt", desKey, JsonConvert.SerializeObject(postData)).ToString(); //DesEncrypt(desKey, JsonConvert.SerializeObject(postData));string postDataContent = "logindata=" + logindataVal;HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);request.Method = "POST";request.ContentType = "application/x-www-form-urlencoded";byte[] data = Encoding.UTF8.GetBytes(postDataContent);request.ContentLength = data.Length;request.AllowAutoRedirect = false;request.CookieContainer = cjolCookies;//request.Accept = "application/json";request.Referer = "http://www.cjol.com/hr/";request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.73 Safari/537.36";Stream myRequestStream = request.GetRequestStream();myRequestStream.Write(data, 0, data.Length);myRequestStream.Close();myRequestStream = null;HttpWebResponse response = (HttpWebResponse)request.GetResponse();return response;}private string GetResponseContent(HttpWebResponse response){Stream myResponseStream = response.GetResponseStream();StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);string retString = myStreamReader.ReadToEnd();myStreamReader.Close();myResponseStream.Close();return retString;}private string GetValidateCode(out string codekey){codekey = null;string validateCode = null;string validateCodeKey = null;var codeForm = new FrmValidateCode();codeForm.ChangeValidateCode += (btn, args) =>{validateCodeKey = Guid.NewGuid().ToString().ToLower();string codeimgUrl = "http://newrms.cjol.com/Common/ValidateCodePicture?Key=1&guid=" + validateCodeKey;args.Data[0] = codeimgUrl;HttpWebRequest request = (HttpWebRequest)WebRequest.Create(codeimgUrl);request.Method = "GET";request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.73 Safari/537.36";request.CookieContainer = cjolCookies;HttpWebResponse response = (HttpWebResponse)request.GetResponse();Stream myResponseStream = response.GetResponseStream();var codePic = new Bitmap(myResponseStream);(args.Data[1] as PictureBox).Image = codePic;myResponseStream.Close();myResponseStream = null;};codeForm.EnterValidateCode += (btn, args) =>{validateCode = args.Data[0].ToString();if (!CheckValidateCode(validateCode)){args.Data[1] = "验证码校验失败！";}};if (codeForm.ShowDialog() == DialogResult.OK){codekey = validateCodeKey;return validateCode;}return null;}private bool CheckValidateCode(string code){HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://newrms.cjol.com/Account/Verification?txtValidateCode=" + code + "&rid=" + Guid.NewGuid().ToString("N"));request.Method = "GET";request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.73 Safari/537.36";request.Host = "newrms.cjol.com";request.Referer = "http://www.cjol.com/hr/";request.CookieContainer = cjolCookies;HttpWebResponse response = (HttpWebResponse)request.GetResponse();string rs = GetResponseContent(response);if (rs.Contains("(true)")){return true;}else{return false;}}public static object JScriptRun(string jsMethodName, params object[] jsParams){//编译的参数  var compiler = _provider.CreateCompiler();CompilerParameters parameters = new CompilerParameters();parameters.GenerateInMemory = true;CompilerResults results = compiler.CompileAssemblyFromSource(parameters, jScriptClass);Assembly assembly = results.CompiledAssembly;//动态编译脚本中的内容  Type _evaluateType = assembly.GetType("kyecjol.jsClass");//执行指定的方法并传参数  object retObj = _evaluateType.InvokeMember(jsMethodName, BindingFlags.InvokeMethod,null, null, jsParams);return retObj;}private const string jScriptClass = @"package kyecjol {public class jsClass {public static function jsencrypt(k,e) {var t = e.replace(/\\0/g, ''),n = stringToHex(des(k, t, 1, 0));//,n=stringToHex(k+e);return n;}public static function des(e, t, n, r,i) {var s = 'charCodeAt', o = 'fromCharCode', u = new Array(16843776,0,65536,16843780,16842756,66564,4,65536,1024,16843776,16843780,1024,16778244,16842756,16777216,4,1028,16778240,16778240,66560,66560,16842752,16842752,16778244,65540,16777220,16777220,65540,0,1028,66564,16777216,65536,16843780,4,16842752,16843776,16777216,16777216,1024,16842756,65536,66560,16777220,1024,4,16778244,66564,16843780,65540,16842752,16778244,16777220,1028,66564,16843776,1028,16778240,16778240,0,65540,66560,0,16842756), a = new Array(-2146402272,-2147450880,32768,1081376,1048576,32,-2146435040,-2147450848,-2147483616,-2146402272,-2146402304,-134217728,-2147450880,1048576,32,-2146435040,1081344,1048608,-2147450848,0,-134217728,32768,1081376,-2146435072,1048608,-2147483616,0,1081344,32800,-2146402304,-2146435072,32800,0,1081376,-2146435040,1048576,-2147450848,-2146435072,-2146402304,32768,-2146435072,-2147450880,32,-2146402272,1081376,32,32768,-134217728,32800,-2146402304,1048576,-2147483616,1048608,-2147450848,-2147483616,1048608,1081344,0,-2147450880,32800,-134217728,-2146435040,-2146402272,1081344), f = new Array(520,134349312,0,134348808,134218240,0,131592,134218240,131080,134217736,134217736,131072,134349320,131080,134348800,520,134217728,8,134349312,512,131584,134348800,134348808,131592,134218248,131584,131072,134218248,8,134349320,512,134217728,134349312,134217728,131080,520,131072,134349312,134218240,0,512,131080,134349320,134218240,134217736,512,0,134348808,134218248,131072,134217728,134349320,8,131592,131584,134217736,134348800,134218248,520,134348800,131592,8,134348808,131584), l = new Array(8396801,8321,8321,128,8396928,8388737,8388609,8193,0,8396800,8396800,8396929,129,0,8388736,8388609,1,8192,8388608,8396801,128,8388608,8193,8320,8388737,1,8320,8388736,8192,8396928,8396929,129,8388736,8388609,8396800,8396929,129,0,0,8396800,8320,8388736,8388737,1,8396801,8321,8321,128,8396929,129,1,8192,8388609,8193,8396928,8388737,8193,8320,8388608,8396801,128,8388608,8192,8396928), c = new Array(256,34078976,34078720,1107296512,524288,256,1073741824,34078720,1074266368,524288,33554688,1074266368,1107296512,1107820544,524544,1073741824,33554432,1074266112,1074266112,0,1073742080,1107820800,1107820800,33554688,1107820544,1073742080,0,1107296256,34078976,33554432,1107296256,524544,524288,1107296512,256,33554432,1073741824,34078720,1107296512,1074266368,33554688,1073741824,1107820544,34078976,1074266368,256,33554432,1107820544,1107820800,524544,1107296256,1107820800,34078720,0,1074266112,1107296256,524544,33554688,1073742080,524288,0,1074266112,34078976,1073742080), h = new Array(536870928,541065216,16384,541081616,541065216,16,541081616,4194304,536887296,4210704,4194304,536870928,4194320,536887296,536870912,16400,0,4194320,536887312,16384,4210688,536887312,16,541065232,541065232,0,4210704,541081600,16400,4210688,541081600,536870912,536887296,16,541065232,4210688,541081616,4194304,16400,536870928,4194304,536887296,536870912,16400,536870928,541081616,4210688,541065216,4210704,541081600,0,541065232,16,16384,541065216,4210704,16384,4194320,536887312,0,541081600,536870912,4194320,536887312), p = new Array(2097152,69206018,67110914,0,2048,67110914,2099202,69208064,69208066,2097152,0,67108866,2,67108864,69206018,2050,67110912,2099202,2097154,67110912,67108866,69206016,69208064,2097154,69206016,2048,2050,69208066,2099200,2,67108864,2099200,67108864,2099200,2097152,67110914,67110914,69206018,69206018,2,2097154,67108864,67110912,2097152,69208064,2050,2099202,69208064,2050,67108866,69208066,69206016,2099200,0,2,69208066,0,2099202,69206016,2048,67108866,67110912,2048,2097154), d = new Array(268439616,4096,262144,268701760,268435456,268439616,64,268435456,262208,268697600,268701760,266240,268701696,266304,4096,64,268697600,268435520,268439552,4160,266240,262208,268697664,268701696,4160,0,0,268697664,268435520,268439552,266304,262144,266304,262144,268701696,4096,64,268697664,4096,266304,268439552,64,268435520,268697600,268697664,268435456,262144,268439616,0,268701760,262208,268435520,268697600,268439552,268439616,0,268701760,266240,266240,4160,4160,262208,268435456,268701696), v = des_createKeys(e), m = 0, g, y, b, w, E, S, x, T, N, C, k, L, A, O, M, _ = t.length, D = 0, P = v.length == 32 ? 3 : 9;P == 3 ? N = n ? new Array(0,32,2) : new Array(30,-2,-2) : N = n ? new Array(0,32,2,62,30,-2,64,96,2) : new Array(94,62,-2,32,64,2,30,-2,-2),t += '\0\0\0\0\0\0\0\0';var result = '',tempresult = '';r == 1 && (C = i[s](m++) << 24 | i[s](m++) << 16 | i[s](m++) << 8 | i[s](m++),L = i[s](m++) << 24 | i[s](m++) << 16 | i[s](m++) << 8 | i[s](m++),m = 0);while (m < _) {n ? (x = t[s](m++) << 16 | t[s](m++),T = t[s](m++) << 16 | t[s](m++)) : (x = t[s](m++) << 24 | t[s](m++) << 16 | t[s](m++) << 8 | t[s](m++),T = t[s](m++) << 24 | t[s](m++) << 16 | t[s](m++) << 8 | t[s](m++)),r == 1 && (n ? (x ^= C,T ^= L) : (k = C,A = L,C = x,L = T)),b = (x >>> 4 ^ T) & 252645135,T ^= b,x ^= b << 4,b = (x >>> 16 ^ T) & 65535,T ^= b,x ^= b << 16,b = (T >>> 2 ^ x) & 858993459,x ^= b,T ^= b << 2,b = (T >>> 8 ^ x) & 16711935,x ^= b,T ^= b << 8,b = (x >>> 1 ^ T) & 1431655765,T ^= b,x ^= b << 1,x = x << 1 | x >>> 31,T = T << 1 | T >>> 31;for (var y = 0; y < P; y += 3) {O = N[y + 1],M = N[y + 2];for (g = N[y]; g != O; g += M)E = T ^ v[g],S = (T >>> 4 | T << 28) ^ v[g + 1],b = x,x = T,T = b ^ (a[E >>> 24 & 63] | l[E >>> 16 & 63] | h[E >>> 8 & 63] | d[E & 63] | u[S >>> 24 & 63] | f[S >>> 16 & 63] | c[S >>> 8 & 63] | p[S & 63]);b = x,x = T,T = b;}x = x >>> 1 | x << 31,T = T >>> 1 | T << 31,b = (x >>> 1 ^ T) & 1431655765,T ^= b,x ^= b << 1,b = (T >>> 8 ^ x) & 16711935,x ^= b,T ^= b << 8,b = (T >>> 2 ^ x) & 858993459,x ^= b,T ^= b << 2,b = (x >>> 16 ^ T) & 65535,T ^= b,x ^= b << 16,b = (x >>> 4 ^ T) & 252645135,T ^= b,x ^= b << 4,r == 1 && (n ? (C = x,L = T) : (x ^= k,T ^= A)),n ? tempresult += String[o](x >>> 24, x >>> 16 & 255, x >>> 8 & 255, x & 255, T >>> 24, T >>> 16 & 255, T >>> 8 & 255, T & 255) : tempresult += String[o](x >>> 16 & 65535, x & 65535, T >>> 16 & 65535, T & 65535),n ? D += 16 : D += 8,D == 512 && (result += tempresult,tempresult = '',D = 0);}return result + tempresult;}public static function des_createKeys(e) {var t = 'charCodeAt',pc2bytes0 = new Array(0,4,536870912,536870916,65536,65540,536936448,536936452,512,516,536871424,536871428,66048,66052,536936960,536936964),pc2bytes1 = new Array(0,1,1048576,1048577,67108864,67108865,68157440,68157441,256,257,1048832,1048833,67109120,67109121,68157696,68157697),pc2bytes2 = new Array(0,8,2048,2056,16777216,16777224,16779264,16779272,0,8,2048,2056,16777216,16777224,16779264,16779272),pc2bytes3 = new Array(0,2097152,134217728,136314880,8192,2105344,134225920,136323072,131072,2228224,134348800,136445952,139264,2236416,134356992,136454144),pc2bytes4 = new Array(0,262144,16,262160,0,262144,16,262160,4096,266240,4112,266256,4096,266240,4112,266256),pc2bytes5 = new Array(0,1024,32,1056,0,1024,32,1056,33554432,33555456,33554464,33555488,33554432,33555456,33554464,33555488),pc2bytes6 = new Array(0,268435456,524288,268959744,2,268435458,524290,268959746,0,268435456,524288,268959744,2,268435458,524290,268959746),pc2bytes7 = new Array(0,65536,2048,67584,536870912,536936448,536872960,536938496,131072,196608,133120,198656,537001984,537067520,537004032,537069568),pc2bytes8 = new Array(0,262144,0,262144,2,262146,2,262146,33554432,33816576,33554432,33816576,33554434,33816578,33554434,33816578),pc2bytes9 = new Array(0,268435456,8,268435464,0,268435456,8,268435464,1024,268436480,1032,268436488,1024,268436480,1032,268436488),pc2bytes10 = new Array(0,32,0,32,1048576,1048608,1048576,1048608,8192,8224,8192,8224,1056768,1056800,1056768,1056800),pc2bytes11 = new Array(0,16777216,512,16777728,2097152,18874368,2097664,18874880,67108864,83886080,67109376,83886592,69206016,85983232,69206528,85983744),pc2bytes12 = new Array(0,4096,134217728,134221824,524288,528384,134742016,134746112,16,4112,134217744,134221840,524304,528400,134742032,134746128),pc2bytes13 = new Array(0,4,256,260,0,4,256,260,1,5,257,261,1,5,257,261);var n = e.length >= 24 ? 3 : 1, r = new Array(32 * n), s = new Array(0,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0), o, u, a = 0, f = 0, l,left,right;for (var c = 0; c < n; c++) {left = e[t](a++) << 24 | e[t](a++) << 16 | e[t](a++) << 8 | e[t](a++),right = e[t](a++) << 24 | e[t](a++) << 16 | e[t](a++) << 8 | e[t](a++),l = (left >>> 4 ^ right) & 252645135,right ^= l,left ^= l << 4,l = (right >>> -16 ^ left) & 65535,left ^= l,right ^= l << -16,l = (left >>> 2 ^ right) & 858993459,right ^= l,left ^= l << 2,l = (right >>> -16 ^ left) & 65535,left ^= l,right ^= l << -16,l = (left >>> 1 ^ right) & 1431655765,right ^= l,left ^= l << 1,l = (right >>> 8 ^ left) & 16711935,left ^= l,right ^= l << 8,l = (left >>> 1 ^ right) & 1431655765,right ^= l,left ^= l << 1,l = left << 8 | right >>> 20 & 240,left = right << 24 | right << 8 & 16711680 | right >>> 8 & 65280 | right >>> 24 & 240,right = l;for (var i = 0; i < s.length; i++)s[i] ? (left = left << 2 | left >>> 26,right = right << 2 | right >>> 26) : (left = left << 1 | left >>> 27,right = right << 1 | right >>> 27),left &= -15,right &= -15,o = pc2bytes0[left >>> 28] | pc2bytes1[left >>> 24 & 15] | pc2bytes2[left >>> 20 & 15] | pc2bytes3[left >>> 16 & 15] | pc2bytes4[left >>> 12 & 15] | pc2bytes5[left >>> 8 & 15] | pc2bytes6[left >>> 4 & 15],u = pc2bytes7[right >>> 28] | pc2bytes8[right >>> 24 & 15] | pc2bytes9[right >>> 20 & 15] | pc2bytes10[right >>> 16 & 15] | pc2bytes11[right >>> 12 & 15] | pc2bytes12[right >>> 8 & 15] | pc2bytes13[right >>> 4 & 15],l = (u >>> 16 ^ o) & 65535,r[f++] = o ^ l,r[f++] = u ^ l << 16;}return r;}public static function stringToHex(e) {var t = 'charCodeAt', n = '', r = new Array('0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F');for (var i = 0; i < e.length; i++)n += r[e[t](i) >> 4] + r[e[t](i) & 15];return n}}}";}

代码逻辑简要说明：

1.GetValidateCode方法：通过GET请求获取登录验证码，并显示在winform的界面上，以便用户可以参照输入，当然如果能够使用第三方打码工具自动识别验证码那就更简单了。

2.HttpPost方法：构建POST请求登录，并返回HttpWebResponse对象

3.从头部取得跳转的位置string newUrl = rs.Headers["Location"].ToString();如果是Default页面且包含message，则通过正则取到message信息并在winform界面上显示报错。

4.jScriptClass这个是从中国人才热线网站COPY的加密算法逻辑，JScriptRun就是执行JS加密算法并得到结果。

5.BaseUtil.OpenAdminPage方法：设置IE COOKIE，并用IE打开管理后台网址；

登录人才热线网站的关键点在于：JS加密及验证码

用法如下：

                    var httpLoginCjol = new HttpLoginCjolHelper();string result = httpLoginCjol.Login(txtCjolUid.Text.Trim(), txtCjolPwd.Text);if (!string.IsNullOrEmpty(result)){MessageBox.Show("登录中国人才热线网站失败，原因：" + result, "登录失败提示");}

登录前程无忧：HttpLogin51JobHelper

    public class HttpLogin51JobHelper{private CookieContainer web51jobCookies = new CookieContainer();public string Login(string uName, string uId, string pwd){string langType, accessKey, fksc, hidEhireGuid, hidRetUrl;ReadHomePageData(out langType, out accessKey, out fksc, out hidEhireGuid, out hidRetUrl);string loginUrl = "https://ehirelogin.51job.com/Member/UserLogin.aspx";var rs = HttpPost(loginUrl, new Dictionary<string, string>{{"ctmName",uName},{"userName",uId},{"password",pwd},{"checkCode",""},{"oldAccessKey",accessKey},{"langtype",langType},{"isRememberMe","false"},{"sc",fksc},{"ec",hidEhireGuid},{"returl",hidRetUrl},{"referrurl","http://ehire.51job.com/"}});string newUrl = rs.Headers["Location"].ToString(); // "http://ehire.51job.com/Candidate/SearchResumeIndexNew.aspx";if (newUrl.IndexOf("errorId=", StringComparison.OrdinalIgnoreCase) > 0){return GetLoginErrMsg(newUrl);}//string rsString = GetResponseContent(rs);BaseUtil.OpenAdminPage(web51jobCookies, new Uri(newUrl));return null;}private void ReadHomePageData(out string langType, out string accessKey, out string fksc, out string hidEhireGuid, out string hidRetUrl){HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://ehire.51job.com/");request.Method = "GET";request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.73 Safari/537.36";request.CookieContainer = web51jobCookies;request.Host = "ehire.51job.com";HttpWebResponse response = (HttpWebResponse)request.GetResponse();string rspContent = GetResponseContent(response);langType = "Lang=&Flag=1"; //getHiddenValueByElementId("hidLangType", rspContent);accessKey = getHiddenValueByElementId("hidAccessKey", rspContent);fksc = getHiddenValueByElementId("fksc", rspContent);hidEhireGuid = getHiddenValueByElementId("hidEhireGuid", rspContent);hidRetUrl = getHiddenValueByElementId("hidRetUrl", rspContent);}private string GetLoginErrMsg(string errUrl){HttpWebRequest request = (HttpWebRequest)WebRequest.Create(errUrl);request.Method = "GET";request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.73 Safari/537.36";request.CookieContainer = web51jobCookies;request.Host = "ehire.51job.com";HttpWebResponse response = (HttpWebResponse)request.GetResponse();string rspContent = GetResponseContent(response);string pattren = @"<div\s+id='errOther'.+<a>(?<msg>.+)</a></div>";var regx = new System.Text.RegularExpressions.Regex(pattren, System.Text.RegularExpressions.RegexOptions.IgnoreCase);string errMsg = regx.Match(rspContent).Groups["msg"].Value;return errMsg;}private HttpWebResponse HttpPost(string url, Dictionary<string, string> postData){string postDataContent = null;foreach (var kv in postData){postDataContent += string.Format("&{0}={1}", kv.Key, kv.Value);}postDataContent = postDataContent.Substring(1);HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);request.Method = "POST";request.ContentType = "application/x-www-form-urlencoded";byte[] data = Encoding.UTF8.GetBytes(postDataContent);request.ContentLength = data.Length;request.AllowAutoRedirect = false;request.CookieContainer = web51jobCookies;request.Host = "ehire.51job.com";request.Headers.Set("Origin", "http://ehire.51job.com");request.Referer = "http://ehire.51job.com";request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.73 Safari/537.36";Stream myRequestStream = request.GetRequestStream();myRequestStream.Write(data, 0, data.Length);myRequestStream.Close();myRequestStream = null;HttpWebResponse response = (HttpWebResponse)request.GetResponse();return response;}private string getHiddenValueByElementId(string eId, string body){string pattren = "id=\"" + eId + "\"\\s+value=\"(?<evalue>\\w+)\"";var regx = new System.Text.RegularExpressions.Regex(pattren, System.Text.RegularExpressions.RegexOptions.IgnoreCase);if (regx.IsMatch(body)){return regx.Match(body).Groups["evalue"].Value;}return string.Empty;}private string GetResponseContent(HttpWebResponse response){Stream myResponseStream = response.GetResponseStream();StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);string retString = myStreamReader.ReadToEnd();myStreamReader.Close();myResponseStream.Close();return retString;}}

代码逻辑简要说明：

1.ReadHomePageData方法：请求登录页面，获取隐藏域的字段信息

2.HttpPost方法：构建POST请求登录，并返回HttpWebResponse对象

3.从头部取得跳转的位置string newUrl = rs.Headers["Location"].ToString();如果包含errorId，则通过请求该error页面获取错误信息GetLoginErrMsg并在winform界面上显示报错。

4.BaseUtil.OpenAdminPage方法：设置IE COOKIE，并用IE打开管理后台网址；

登录前程无忧网站的关键点在于：取得登录页面的隐藏域的字段信息

用法如下：

                    var httpLogin51Job = new HttpLogin51JobHelper();string result = httpLogin51Job.Login(txt51JobUName.Text.Trim(), txt51JobUid.Text.Trim(), txt51JobPwd.Text);if (!string.IsNullOrEmpty(result)){MessageBox.Show("登录前程无忧网站失败，原因：" + result, "登录失败提示");}

以下是如何设置IE COOKIE及通过IE打开指定网站的方法：

        public static void OpenAdminPage(CookieContainer cookies, Uri rsUri){foreach (Cookie cookie in cookies.GetCookies(rsUri)) //将cookie设置为浏览的cookie  {InternetSetCookie("http://" + cookie.Domain.ToString(),cookie.Name.ToString(),cookie.Value.ToString() + ";expires=" + DateTime.UtcNow.AddDays(1).ToString("R"));}System.Diagnostics.Process.Start("iexplore.exe", rsUri.AbsoluteUri); //打开浏览器  }

关于C#执行Javascript方法有如下几种：（我这里仅做一个汇总，可能不止这么多）

第一种：引用：Microsoft.JScript.DLL，然后使用：JScriptCodeProvider对象来动态编译jscript脚本（CompileAssemblyFromSource）生成程序集，最后通过这个JS程序集反射执行JS方法；参考说明：http://www.cnblogs.com/xdpxyxy/archive/2013/06/12/3132868.html

第二种：引用：Interop.MSScriptControl.dll，然后使用Eval执行脚本内容，参考说明：http://www.cnblogs.com/preacher/p/6347251.html 、 http://www.cnblogs.com/feiyuhuo/p/5474790.html

第三种：引用：开源项目 Javascript .NET（Noesis.Javascript.dll、msvcp100.dll、msvcr100.dll复制到bin目录下），然后使用JavascriptContext的Run方法执行，参考说明：http://www.cnblogs.com/yjmyzz/p/3359204.html

第四种：引用：Microsoft.JScript.Vsa（Microsoft.JScript、Microsoft.Vsa），然后使用Microsoft.JScript.Eval.JScriptEvaluate方法执行，参考说明：http://www.cnblogs.com/yjmyzz/p/3359204.html

第五种：在winform窗体中加入 WebBrowser 控件，然后将JS通过Url或直接设置DocumentText，最后利用webBrowser1.Document.InvokeScript方法执行WebBrowser 控件包含的JS方法，参考说明：http://blog.csdn.net/luxiaoyu_sdc/article/details/6896451 、 http://www.cnblogs.com/feiyuhuo/p/5474790.html （仅winform项目适用）

转载于:https://www.cnblogs.com/zuowj/p/6855610.html

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