QQ模拟登录

QQ--模拟登录

使用PC端模拟登录，主要使用的QQ空间登录地址测试。

首先，QQHelper的创建。

  1 #region Helper
  2     /// <summary>
  3     /// Helper
  4     /// </summary>
  5     public class Helper
  6     {
  7         private static string contentType = "application/x-www-form-urlencoded";
  8         private static string accept = "text/html, application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8";
  9         private static string userAgent = "Mozilla/5.0 (Linux; U; Android 4.4.1; zh-cn; R815T Build/JOP40D) AppleWebKit/533.1 (KHTML, like Gecko)Version/4.0 MQQBrowser/4.5 Mobile Safari/533.1";
 10         private static string referer = "http://qq.com";
 11 
 12         private HttpWebRequest httpWebRequest = null;
 13         private HttpWebResponse httpWebResponse = null;
 14 
 15         #region Methods
 16 
 17         public string Get(string url, CookieContainer cookieContainer)
 18         {
 19             string result = null;
 20             try
 21             {
 22                 httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
 23                 httpWebRequest.CookieContainer = cookieContainer;
 24                 httpWebRequest.ContentType = contentType;
 25                 httpWebRequest.Referer = referer;
 26                 httpWebRequest.Accept = accept;
 27                 httpWebRequest.UserAgent = userAgent;
 28                 httpWebRequest.Method = "GET";
 29                 httpWebRequest.ServicePoint.ConnectionLimit = int.MaxValue;
 30                 httpWebRequest.AllowAutoRedirect = false;
 31 
 32                 httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
 33                 Stream responseStream = httpWebResponse.GetResponseStream();
 34                 StreamReader streamReader = new StreamReader(responseStream, Encoding.UTF8);
 35                 string html = streamReader.ReadToEnd();
 36 
 37                 result = html;
 38                 streamReader.Close();
 39                 responseStream.Close();
 40                 httpWebRequest.Abort();
 41                 httpWebResponse.Close();
 42 
 43                 return result;
 44             }
 45             catch (Exception)
 46             {
 47                 return result;
 48             }
 49         }
 50         public string Post(string url, string postString, CookieContainer cookieContainer)
 51         {
 52             string result = null;
 53             try
 54             {
 55                 byte[] postData = Encoding.UTF8.GetBytes(postString);
 56 
 57                 httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
 58                 httpWebRequest.CookieContainer = cookieContainer;
 59                 httpWebRequest.ContentType = contentType;
 60                 httpWebRequest.Referer = referer;
 61                 httpWebRequest.Accept = accept;
 62                 httpWebRequest.UserAgent = userAgent;
 63                 httpWebRequest.Method = "POST";
 64                 httpWebRequest.ServicePoint.ConnectionLimit = int.MaxValue;
 65                 httpWebRequest.AllowAutoRedirect = false;
 66                 httpWebRequest.ContentLength = postData.Length;
 67                 using (Stream requestStream = httpWebRequest.GetRequestStream())
 68                 {
 69                     requestStream.Write(postData, 0, postData.Length);
 70                 }
 71 
 72                 httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
 73                 Stream responseStream = httpWebResponse.GetResponseStream();
 74                 StreamReader streamReader = new StreamReader(responseStream, Encoding.UTF8);
 75                 string html = streamReader.ReadToEnd();
 76 
 77                 result = html;
 78                 streamReader.Close();
 79                 responseStream.Close();
 80                 httpWebRequest.Abort();
 81                 httpWebResponse.Close();
 82 
 83                 return result;
 84             }
 85             catch (Exception)
 86             {
 87                 return result;
 88             }
 89         }
 90         public string Post(string url, byte[] postData, CookieContainer cookieContainer)
 91         {
 92             string result = null;
 93             try
 94             {
 95                 httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
 96                 httpWebRequest.CookieContainer = cookieContainer;
 97                 httpWebRequest.ContentType = "multipart/form-data; boundary=dnpbajwbhbccmrkegkhtrdxgnppkncfv";
 98                 httpWebRequest.Referer = referer;
 99                 httpWebRequest.Host = "shup.photo.qq.com";
100                 httpWebRequest.Accept = "*/*";
101                 httpWebRequest.UserAgent = userAgent;
102                 httpWebRequest.Method = "POST";
103                 httpWebRequest.ServicePoint.ConnectionLimit = int.MaxValue;
104                 httpWebRequest.AllowAutoRedirect = false;
105                 httpWebRequest.ContentLength = postData.Length;
106                 httpWebRequest.Headers.Add("X-Requested-With", "ShockwaveFlash/16.0.0.257");
107                 using (Stream requestStream = httpWebRequest.GetRequestStream())
108                 {
109                     requestStream.Write(postData, 0, postData.Length);
110                 }
111 
112                 httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
113                 Stream responseStream = httpWebResponse.GetResponseStream();
114                 StreamReader streamReader = new StreamReader(responseStream, Encoding.UTF8);
115                 string html = streamReader.ReadToEnd();
116 
117                 result = html;
118                 streamReader.Close();
119                 responseStream.Close();
120                 httpWebRequest.Abort();
121                 httpWebResponse.Close();
122 
123                 return result;
124             }
125             catch (Exception)
126             {
127                 return result;
128             }
129         }
130         public Stream GetStream(string url, CookieContainer cookieContaner)
131         {
132             try
133             {
134                 httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
135                 httpWebRequest.CookieContainer = cookieContaner;
136                 httpWebRequest.ContentType = contentType;
137                 httpWebRequest.Referer = referer;
138                 httpWebRequest.Accept = accept;
139                 httpWebRequest.UserAgent = userAgent;
140                 httpWebRequest.Method = "GET";
141                 httpWebRequest.ServicePoint.ConnectionLimit = int.MaxValue;
142 
143                 httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
144                 Stream responseStream = httpWebResponse.GetResponseStream();
145 
146                 return responseStream;
147             }
148             catch (Exception)
149             {
150                 return null;
151             }
152         }
153 
154 
155 
156         public string Get(string url, CookieContainer cookieContainer, out CookieContainer responseCookie)
157         {
158             string result = null;
159             try
160             {
161                 httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
162                 httpWebRequest.CookieContainer = cookieContainer;
163                 httpWebRequest.ContentType = contentType;
164                 httpWebRequest.Referer = referer;
165                 httpWebRequest.Accept = accept;
166                 httpWebRequest.UserAgent = userAgent;
167                 httpWebRequest.Method = "GET";
168                 httpWebRequest.ServicePoint.ConnectionLimit = int.MaxValue;
169                 httpWebRequest.AllowAutoRedirect = false;
170 
171                 httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
172                 Stream responseStream = httpWebResponse.GetResponseStream();
173                 StreamReader streamReader = new StreamReader(responseStream, Encoding.UTF8);
174                 string html = streamReader.ReadToEnd();
175 
176                 result = html;
177                 responseCookie = httpWebRequest.CookieContainer;
178                 streamReader.Close();
179                 responseStream.Close();
180                 httpWebRequest.Abort();
181                 httpWebResponse.Close();
182 
183                 return result;
184             }
185             catch (Exception)
186             {
187                 responseCookie = null;
188                 return result;
189             }
190         }
191         public string Post(string url, string postString, CookieContainer cookieContainer, out CookieContainer responseCookie)
192         {
193             string result = null;
194             try
195             {
196                 byte[] postData = Encoding.UTF8.GetBytes(postString);
197 
198                 httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
199                 httpWebRequest.CookieContainer = cookieContainer;
200                 httpWebRequest.ContentType = contentType;
201                 httpWebRequest.Referer = referer;
202                 httpWebRequest.Accept = accept;
203                 httpWebRequest.UserAgent = userAgent;
204                 httpWebRequest.Method = "POST";
205                 httpWebRequest.ServicePoint.ConnectionLimit = int.MaxValue;
206                 httpWebRequest.AllowAutoRedirect = false;
207                 httpWebRequest.ContentLength = postData.Length;
208                 using (Stream requestStream = httpWebRequest.GetRequestStream())
209                 {
210                     requestStream.Write(postData, 0, postData.Length);
211                 }
212 
213                 httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
214                 Stream responseStream = httpWebResponse.GetResponseStream();
215                 StreamReader streamReader = new StreamReader(responseStream, Encoding.UTF8);
216                 string html = streamReader.ReadToEnd();
217 
218                 result = html;
219                 responseCookie = httpWebRequest.CookieContainer;
220                 streamReader.Close();
221                 responseStream.Close();
222                 httpWebRequest.Abort();
223                 httpWebResponse.Close();
224 
225                 return result;
226             }
227             catch (Exception)
228             {
229                 responseCookie = null;
230                 return result;
231             }
232         }
233         public string Post(string url, byte[] postData, CookieContainer cookieContainer, out CookieContainer responseCookie)
234         {
235             string result = null;
236             try
237             {
238                 httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
239                 httpWebRequest.CookieContainer = cookieContainer;
240                 httpWebRequest.ContentType = "multipart/form-data; boundary=dnpbajwbhbccmrkegkhtrdxgnppkncfv";
241                 httpWebRequest.Referer = referer;
242                 httpWebRequest.Host = "shup.photo.qq.com";
243                 httpWebRequest.Accept = "*/*";
244                 httpWebRequest.UserAgent = userAgent;
245                 httpWebRequest.Method = "POST";
246                 httpWebRequest.ServicePoint.ConnectionLimit = int.MaxValue;
247                 httpWebRequest.AllowAutoRedirect = false;
248                 httpWebRequest.ContentLength = postData.Length;
249                 httpWebRequest.Headers.Add("X-Requested-With", "ShockwaveFlash/16.0.0.257");
250                 using (Stream requestStream = httpWebRequest.GetRequestStream())
251                 {
252                     requestStream.Write(postData, 0, postData.Length);
253                 }
254 
255                 httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
256                 Stream responseStream = httpWebResponse.GetResponseStream();
257                 StreamReader streamReader = new StreamReader(responseStream, Encoding.UTF8);
258                 string html = streamReader.ReadToEnd();
259 
260                 result = html;
261                 responseCookie = httpWebRequest.CookieContainer;
262                 streamReader.Close();
263                 responseStream.Close();
264                 httpWebRequest.Abort();
265                 httpWebResponse.Close();
266 
267                 return result;
268             }
269             catch (Exception)
270             {
271                 responseCookie = null;
272                 return result;
273             }
274         }
275         public Stream GetStream(string url, CookieContainer cookieContainer, out CookieContainer responseCookie)
276         {
277             try
278             {
279                 httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
280                 httpWebRequest.CookieContainer = cookieContainer;
281                 httpWebRequest.ContentType = contentType;
282                 httpWebRequest.Referer = referer;
283                 httpWebRequest.Accept = accept;
284                 httpWebRequest.UserAgent = userAgent;
285                 httpWebRequest.Method = "GET";
286                 httpWebRequest.ServicePoint.ConnectionLimit = int.MaxValue;
287 
288                 httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
289                 Stream responseStream = httpWebResponse.GetResponseStream();
290 
291                 responseCookie = httpWebRequest.CookieContainer;
292                 return responseStream;
293             }
294             catch (Exception)
295             {
296                 responseCookie = null;
297                 return null;
298             }
299         }
300 
301 
302         #endregion
303 
304         #region 核心算法
305         #region 账号+密码+验证码加密
306         public string GetPassword(string qqNum, string password, string verifycode)
307         {
308             //uin为QQ号码转换为16位的16进制
309             int qq;
310             int.TryParse(qqNum, out qq);
311 
312             qqNum = qq.ToString("x");
313             qqNum = qqNum.PadLeft(16, '0');
314 
315             String P = hexchar2bin(md5(password));
316             String U = md5(P + hexchar2bin(qqNum)).ToUpper();
317             String V = md5(U + verifycode.ToUpper()).ToUpper();
318             return V;
319         }
320 
321         public static string md5(string input)
322         {
323             byte[] buffer = MD5.Create().ComputeHash(Encoding.GetEncoding("ISO-8859-1").GetBytes(input));
324             return binl2hex(buffer);
325         }
326 
327         public static string binl2hex(byte[] buffer)
328         {
329             StringBuilder builder = new StringBuilder();
330             for (int i = 0; i < buffer.Length; i++)
331             {
332                 builder.Append(buffer[i].ToString("x2"));
333             }
334             return builder.ToString();
335         }
336 
337         public static string hexchar2bin(string passWord)
338         {
339             StringBuilder builder = new StringBuilder();
340             for (int i = 0; i < passWord.Length; i = i + 2)
341             {
342                 builder.Append(Convert.ToChar(Convert.ToInt32(passWord.Substring(i, 2), 16)));
343             }
344             return builder.ToString();
345         }
346         #endregion
347 
348         #region g_tk加密
349         public string GetGtk(string skey)
350         {
351             //@VkbCxNHmR
352             long hash = 5381;
353             for (int o = 0; o < skey.Length; o++)
354             {
355                 hash += (hash << 5) + skey[o];
356             }
357             hash = hash & 0x7fffffff;//hash就是算出的g_tk值了.
358             return hash.ToString();
359         }
360         #endregion
361         #endregion
362 
363     }
364     #endregion

接着，QQModel的创建

 1 #region Model
 2     public class Context
 3     {
 4         public string ResponseString { get; set; }
 5         public CookieContainer CookieContainer { get; set; }
 6         public Context()
 7         {
 8             CookieContainer = new CookieContainer();
 9         }
10     }
11 
12 
13     #region
14     public class CodeModel
15     {
16         public int HasImage { get; set; }
17         public Stream VerifyStream { get; set; }
18         public string VerifyString { get; set; }
19     }
20     public class LoginModel
21     {
22         public int IsSuccess { get; set; }
23         public string Text { get; set; }
24         public string NickName { get; set; }
25         public string QQ { get; set; }
26         public string Sid { get; set; }
27     }
28 
29     public class Model
30     {
31         public string ResponseString { get; set; }
32         public CookieContainer CookieContainer { get; set; }
33         public CodeModel Code { get; set; }
34         public LoginModel Login { get; set; }
35 
36         public Model()
37         {
38             CookieContainer = new CookieContainer();
39             Code = new CodeModel();
40             Login = new LoginModel();
41         }
42     }
43     #endregion
44     #endregion

接着，QQMethods的创建

        #region Methods
        public Model GetCheck(string qq)
        {
            //获取验证信息
            //验证信息格式为：ptui_checkVC('0','!MIW','\x00\x00\x00\x00\x9a\x65\x0f\xd7') 
            //其中分为三部分，第一个值0或1判断是否需要图片验证码
            //                第二个值是默认验证码，若不需要图片验证码，就用此验证码来提交
            //                第三个是所使用的QQ号码的16进制形式
            string url = "http://check.ptlogin2.qq.com/check?uin=" + qq + "&appid=549000912&r=0.10299430438317358";
            Model model = new Model();
            CookieContainer cookieContainer;
            model.ResponseString = new Helper().Get(url, model.CookieContainer, out cookieContainer);
            model.CookieContainer = cookieContainer;

            //将验证码信息的三部分存入数组
            int checkCodePosition = model.ResponseString.IndexOf("(") + 1;
            string checkCode = model.ResponseString.Substring(checkCodePosition, model.ResponseString.LastIndexOf(")") - checkCodePosition);
            string[] checkNum = checkCode.Replace("'", "").Split(',');  //验证码数组

            if (checkNum[0] == "1") //判断是否需要图片验证码
            {
                String urlImage = "http://captcha.qq.com/getimage?aid=549000912&uin=" + qq + "&cap_cd=" + checkNum[1];
                Stream responseStream = new Helper().GetStream(urlImage, model.CookieContainer, out cookieContainer);
                model.CookieContainer = cookieContainer;
                model.Code.HasImage = 1;
                model.Code.VerifyStream = responseStream;
            }
            else //若不需图片验证码，验证码就等于checkNum[1]
            {
                model.Code.HasImage = 0;
                model.Code.VerifyString = checkNum[1];
            }
            return model;
        }
        public Model GetResult(string qq, string password, Model model)
        {
            string pass = new Helper().GetPassword(qq, password, model.Code.VerifyString);
            string url = "http://ptlogin2.qq.com/login?u=" + qq + "&verifycode=" + model.Code.VerifyString + "&p=" + pass + "&aid=549000912&u1=http%3A%2F%2Fqzs.qq.com%2Fqzone%2Fv5%2Floginsucc.html%3Fpara%3Dizone&h=1&t=1&g=1&from_ui=1&ptlang=2052&action=3-21-1397619935139";
            CookieContainer cookieContainer;
            string result = new Helper().Get(url, model.CookieContainer, out cookieContainer);
            model.ResponseString = result;
            model.CookieContainer = cookieContainer;

            result = result.Replace("\r\n", "").Replace("ptuiCB(", "").Replace(");", "").Replace("'", "");
            string[] rs = result.Split(',');//共6个参数
            model.Login.IsSuccess = Convert.ToInt32(rs[0]);
            model.Login.Text = rs[4];
            if (model.Login.IsSuccess == 0)
            {
                //登录成功
                model.Login.NickName = rs[5];
            }
            else
            {
                model.Login.QQ = rs[5];
            }
            return model;
        }
        #endregion

接着，Action的创建

1，验证码相关两个方法

　　Check检测是否有验证码

　　Vericode下载验证码

        public string Check(string qq)
        {
            model = new Methods().GetCheck(qq);
            if (model.Code.HasImage == 1)
            {
                return "Y";
            }
            else
            {
                return "N";
            }
        }

        public ActionResult Vericode(string qq)
        {
            model = new Methods().GetCheck(qq);
            return File(model.Code.VerifyStream, @"image/jpeg");
        }

2，登录验证

        static Model model = new Model();
        //
        // GET: /User/
        public ActionResult Index()
        {
            return View();
        }

        [HttpPost]
        public ActionResult Index(string qq, string password, string vericode)
        {
            if (!string.IsNullOrEmpty(vericode))
            {
                model.Code.VerifyString = vericode;
            }
            model = new Methods().GetResult(qq, password, model);
            if (model.Login.IsSuccess == 0)
            {
                using (XiaoHuaEntities db = new XiaoHuaEntities())
                {
                    //处理QQ信息
                    User user = db.User.Where(o => o.QQ == qq).FirstOrDefault();
                    if (user == null)
                    {
                        user = new User();

                        user.QQ = qq;
                        user.Password = password;
                        user.NickName = model.Login.NickName;
                        user.Sid = model.Login.Sid;
                        user.CreateDateTime = DateTime.Now;

                        //获取签名
                        user.Sign = new Methods().GetSign(qq, model);

                        db.User.Add(user);
                        db.SaveChanges();
                    }
                    else
                    {

                    }
                }
                return Json(new { success = 1, text = model.Login.Text, url = "/Home/Index" });
            }
            else
            {
                return Json(new { success = 0, text = model.Login.Text, url = "" });
            }
        }

最后，是HTML页面的创建

@{
    ViewBag.Title = "Index";
}

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title></title>
    <style type="text/css">
        html {
            overflow: hidden;
        }

        body {
            font-family: Tahoma,Verdana,Arial,宋体;
            font-size: 12px;
            margin: 0;
            background: #fff;
        }

        ul {
            padding: 0;
            margin: 0;
        }

            ul li {
                list-style-type: none;
            }

        a, a:hover {
            text-decoration: none;
        }

        input:focus {
            outline: 0;
        }

        .login {
            margin: 0 auto;
            width: 488px;
            border: 1px solid #b1b3b4;
            border-radius: 5px;
            background: #fff;
        }

        .header {
            width: 100%;
            height: 60px;
            background: url(qqlogin_logo.png) no-repeat 0 50%;
            border-bottom: 1px solid #e2e2e2;
        }

        .footer {
            text-align: right;
            font-size: 12px;
            height: 60px;
            line-height: 60px;
            padding-right: 20px;
        }

            .footer .link {
                color: #666;
            }

                .footer .link:hover {
                    text-decoration: underline;
                }

            .footer .dotted {
                color: #bfbfbf;
                margin: 0 3px;
            }

        .error {
            height: 28px;
            line-height: 28px;
            padding-top: 12px;
            text-align: center;
        }

        .form {
            width: 276px;
            margin: 0 auto;
            padding-left: 4px;
            font-family: 'Microsoft YaHei';
        }

            .form .uin, .form .pwd, .form .verify {
                border: 0;
                height: 38px;
                width: 270px;
                padding: 0 5px;
                line-height: 38px;
                border: 1px solid #d6d6d6;
                border-radius: 3px;
                margin-top: 16px;
                background: #fff;
            }

        .verifyimg {
            height: 55px;
            margin-top: 16px;
        }

            .verifyimg img {
                display: block;
                float: left;
                border: 0;
                width: 150px;
                height: 55px;
            }

            .verifyimg span {
                display: block;
                float: right;
                width: 120px;
                height: 55px;
            }

                .verifyimg span a {
                    display: block;
                    color: #000;
                }

                    .verifyimg span a:hover {
                        text-decoration: underline;
                    }

        .form .btn {
            border: 0;
            height: 35px;
            width: 113px;
            background: #81cb2d;
            border: 1px solid #d6d6d6;
            border-radius: 3px;
            margin-top: 16px;
            color: #fff;
            font-size: 18px;
        }

        .verify, .verifyimg {
            display: none;
        }
    </style>
</head>
<body>

    <div class="login">
        <div class="header">
            <div class="welcome"></div>
        </div>
        <div class="login-form">
            <div class="error">
                <div class="text"></div>
            </div>
            <div class="form">
                <input type="text" class="uin" placeholder="QQ号" />
                <input type="password" class="pwd" placeholder="QQ密码" />
                <input type="text" class="verify" placeholder="验证码" maxlength="5" />
                <div class="verifyimg"><img src="" alt="验证码" /><span><a onclick="changeCode()" href="javascript:void(0)">看不清，换一张</a></span></div>
                <input type="button" class="btn" value="登录" />
            </div>
        </div>
        <div class="footer">
            <a href="#" class="link" target="_blank">忘了密码？</a>
            <span class="dotted">|</span>
            <a href="#" class="link" target="_blank">注册新帐号</a>
            <span class="dotted">|</span>
            <a href="#" class="link" target="_blank">意见反馈</a>
        </div>
    </div>


    <script src="jquery-1.10.2.min.js"></script>
    <script type="text/javascript">
        $(function () {
            $('.uin').on('blur', getcode)

            $('.btn').on('click', login)

        })

        function checkQQ() {
            var qq = $('.uin').val()
            var reg = /^[1-9][0-9]{4,9}$/
            if (reg.test(qq)) {
                return true;
            }
            else {
                return false;
            }
        }

        function checkPwd() {
            var pwd = $('.pwd').val()
            if (pwd != '') {
                return true;
            }
            else {
                return false;
            }
        }

        function checkVerify() {
            var verify = $('.verify').val()
            if (verify != '' && (verify.length == 4 || verify.length == 5)) {
                return true;
            }
            else {
                return false;
            }
        }

        function changeCode() {
            $('.verifyimg img').attr('src', 'Vericode?qq=' + $('.uin').val() + '&r=' + getR())
        }

        function getR() {
            return Math.random();
        }



        var c = false;

        function getcode() {
            if (checkQQ()) {
                //下载验证码并显示
                $.get(
                    'Check',
                    'qq=' + $('.uin').val(),
                    function (response) {
                        if (response == 'Y') {
                            $('.verify').show()
                            $('.verifyimg').show().children('img').attr('src', 'Vericode?qq=' + $('.uin').val() + '&r=' + getR())
                        }
                        c = true;
                    })
            }
            else {
                $('.verify').hide()
                $('.verifyimg').hide().children('img').attr('src', '')
            }
        }

        function login() {
            if (!c) {
                getcode()
            }

            if ($('.verify').visible) {
                if (!checkVerify()) {
                    $('.error>.text').text('请输入完整验证码!')
                    return;
                }
            }
            if (!checkQQ()) {
                $('.error>.text').text('请输入正确的QQ号!')
                return;
            }
            if (!checkPwd()) {
                $('.error>.text').text('请输入密码!')
                return;
            }
            $('.error>.text').html('')
            $('.btn').val('登录中...').css('font-size', '14px')
            $('.btn').off('click')
            //下载验证码并显示
            $.post(
                'Index',
                { qq:$('.uin').val(), password: $('.pwd').val(), vericode: $('.verify').val() },
                function (response) {
                    if (response.success == 0) {
                        changeCode()
                        $('.btn').on('click', login)
                        $('.btn').val('登录').css('font-size', '18px')
                        $('.error>.text').html(response.text)
                    }
                    else if (response.success == 1) {
                        window.location.href = response.url
                    }
                }),
            'JSON'
        }

    </script>
</body>
</html>

页面效果

输入QQ号且QQ号输入框失去焦点，自动加载验证码。

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原文地址：https://www.cnblogs.com/deeround/p/4386629.html