驗證碼插件 vercode.js 詳情 - 前端,jQuery 名字什麼都是浮雲動態日志

第1代圖片驗證碼 - 字母數字型

第2代滑動驗證碼 - 圖片截取型

第3代驗證碼 - 選圖型

vercode.js 結合了上面的情況下新研發的一種驗證碼。

驗證碼類型	驗證碼描述	操作性	安全性	描述
字母數字型圖片驗證碼	這是一種通過後台隨機碼生成圖片的驗證碼。服務器會在隨機碼生成時保存隨機碼。當進行登錄驗證時，會根據輸入的驗證碼與服務器保存的驗證碼進行匹配。	★★★	★★★★	需要輸入客户端與服務端聯合驗證，安全性高
滑動驗證碼	這是一種客户端驗證的驗證碼，相對來説安全性不高，因為隨機碼是客户端生成的，驗證也是客户端完成的，客户端完成之後再執行的服務器賬號密碼驗證，對於存在攻擊性的情況下來説，獲取到服務器驗證接口後，是完全可以跳過客户端驗證直接訪問服務端接口進行賬號和密碼驗證的。	★★★★★	★★★	只需要滑動僅客户端驗證，安全性低
選圖型驗證碼	這是一種通過服務端圖片與字符匹配的關係生成的一種拼圖提供給客户端，客户端點擊拼圖後，會保存拼圖背後的字符，從而拿客户端的字符與服務端圖片對應字符進行匹配	★★★	★★★★★	需要人眼識別和選擇客户端與服務端聯合驗證，安全性高
vercode驗證碼	這種是結合了第一種驗證碼，它也是通過服務端賬號生成隨機字符，並保留隨機字符，如果賬號不匹配的話，是沒辦法獲取到驗證碼的，然後生成字符圖片給客户端，客户端生成鍵盤，用户通過選擇鍵盤字符。然後在登錄時將賬號密碼以及選擇的字符一併提供給服務端驗證。	★★★★	★★★★	直接選擇客户端與服務端聯合驗證，安全性高

vercode.js

var vercode = new Object();
vercode.apiPath = "";
vercode.userId = "";
vercode.generateVerifyImage = function () {
    try {
        var url = vercode.apiPath;
        var userId = $(vercode.userId).val();
        $.ajax({
            url: url,
            type: 'post',
            data: { userId: userId },
            dataType: 'json',
            async: false,
            success: function (res) {
                if (res.code == 0) {
                    document.getElementById('verImage').src = "data:image/jepg;base64," + res.data;
                }
            },
            error: function () {
                console.log('Error occurred while opening the image file.');
            }
        });
    } catch (e) {

    } finally {
        document.getElementById('verset').style.display = 'block';
        document.getElementById('verset').style.top = ($('#vercode').offset().top + $('#vercode').height())+"px";
        document.getElementById('verset').style.left = ($('#vercode').offset().left)+"px";
        document.getElementById('code').innerText = '';
    }
}
vercode.appendVer = function (v) {
    var codeLength = 4;//   驗證碼長度
    if (document.getElementById('code').innerText.length == codeLength) {
        document.getElementById('verset').style.display = 'none';
        return;
    }
    document.getElementById('code').innerText += v.innerText;
};
vercode.Init = function (apiPath, userId) {
    let arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
    //arr.sort(() => Math.random() - 0.5);    //  如果希望鍵盤順序顯示，註釋改行
    arr.splice(9, 0, 99);
    arr.push(99);

    var template = "";
    for (var i = 0; i < 12; i++) {
        if (i == 9 ) {
            template += '<li onclick="vercode.generateVerifyImage()">重置</li>';
        }
        else if (i == 11) {
            template += '<li onclick="document.getElementById(\'verset\').style.display = \'none\'">確認</li>';
        }
        else {
            template += '<li onclick="vercode.appendVer(this)">' + arr[i] + '</li>';
        }
    }
    $(".verset ul").html(template);
    $("#verImage").click(function () {
        vercode.generateVerifyImage();
    })
    $("#verImage").attr("title", "點擊後刷新驗證碼");
    vercode.apiPath = apiPath;
    vercode.userId = userId;
};

vercode.css

.vercode {
    width: 330px;
    margin:10px 0px;
}

    .vercode .code {
        display: inline-block;
        width: 45%;
        margin-right: 5px;
        font-family: 'Arial Unicode MS';
        font: 20px/38px bold;
        line-height: 38px;
        height: 38px;
        text-align: center;
        float: left;
        border-radius: 5px;
        background-color: #f8f4f4;
        text-shadow: 2px 2px 2px #52c574;
    }

            .vercode .verimg {
                display: inline-block;
                width: 45%;
                margin-left: 5px;
                line-height: 38px;
                height: 38px;
                text-align: center;
                cursor: pointer;
            }

                .vercode .verimg img {
                    display: inline-block;
                    width: 100%;
                    height: 38px;
                    vertical-align: middle;
                    line-height: 38px;
                    text-align: center;
                    cursor: pointer;
                }

.verset {
    width: 330px;
    padding: 0px;
    text-align: left;
    height: 100px;
    display: none;
    margin: 10px;
    height: 120px;
    position: fixed;
    top: 0px;
    left: 0px;
    z-index: 9999;
}

        .verset ul {
            width: 76%;
            height: 126px;
            line-height: 28px;
            margin: 0px;
            clear: both;
            padding: 5px 0px;
            padding-left: 5px;
        }

            .verset ul li {
                float: left;
                list-style: none;
                width: 31%;
                background-color: #fff; /*  修改按鈕背景色   */
                text-align: center;
                border: 1px solid #666;
                color: #666; /*  修改按鈕字體色   */
                border-radius: 5px;
                cursor: pointer;
                margin:1px;
            }

<li>
                    <em></em>
                    <input type="text" id="userId" tabindex="1" placeholder="請輸入用户名" class="longcode" />
                    <label id="imgUid" class="error_msg"></label>
                </li>
                <li>
                    <em class="code"></em>
                    <input type="password" id="pwd" placeholder="請輸入密碼" class="longcode on" tabindex="2" />
                    <label id="imgPwd" class="error_msg"></label>
                </li>


                <li>
                    <div class="vercode" id="vercode">
                        <div class="code" id="code"></div>
                        <div class="verimg">
                            <img src="" id="verImage" />
                        </div>
                    </div>

                </li>
...

 <div class="verset" id="verset">
            <ul></ul>
        </div>

<script>
        function syslogin() {
            $.post('/Login/Verify', { userId: $("#userId").val(), pwd: $("#pwd").val(), clientCode: $("#code").text() }, function (res) {
                if (res.code != 0) {
                    document.getElementById('lblMessage').innerText = res.msg;
                    document.getElementById('lblMessage').style.color = "red";
                }
                else {
                    document.getElementById('lblMessage').innerText = res.msg;
                    document.getElementById('lblMessage').style.color = "green";
                    //setTimeout(function () {
                    //    location.href = '/Basic/IcsonFrame_DBC_Table.aspx';
                    //},1000)
                }
            });
        }
       
    </script>

vercode.Init方法第一個參數是請求服務端驗證碼圖片的接口地址，第二個參數是登錄該賬號的用户名元素

<script>
        $(function () {
            vercode.Init('/Login/GenerateVerifyImage', "#userId");
        })
    </script>

　　服務端驗證代碼C#

public class LoginController : Controller
    {
        private VryImgGen vryImgGen = new VryImgGen();
        // GET: Home
        public ActionResult Index()
        {
            return View();
        }
        [HttpPost]
        public ActionResult Verify(string userId,string pwd,string clientCode)
        {
            if(clientCode != Session[userId].TryString(""))
            {
                return Json(new { code = -1, msg = "驗證碼錯誤！" });
            }

            return Json(new { code = 0, msg = "驗證成功" });
        }
        [HttpPost]
        public ActionResult GenerateVerifyImage(string userId)
        {
            //  校驗用户賬號是否有效，無效則返回空的圖片
            var verifyCode = new Random().Next(1000, 9999).ToString();
            var bmp = vryImgGen.CreateImageCode(verifyCode);
            Session[userId] = verifyCode;

            MemoryStream ms = new MemoryStream();
            bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
            byte[] arr = new byte[ms.Length];
            ms.Position = 0;
            ms.Read(arr, 0, (int)ms.Length);
            ms.Close();
            return Json(new { code = 0, data = Convert.ToBase64String(arr),msg="獲取驗證碼成功" });
        }
    }

　　生成驗證碼圖片的代碼C#

using System;
using System.Collections.Generic;
using System.Web;
using System.Drawing;
...

/// <summary>
    /// 圖片驗證碼
    /// </summary>
    public class VryImgGen
    {
        #region 生成校驗碼圖片
        /// <summary>
        /// 生成校驗碼圖片
        /// 校驗碼保存在Session["ImgGen"]中
        /// </summary>
        /// <returns>Bitmap</returns>
        public Bitmap CreateImageCode()
        {
            string code = CreateVerifyCode(Length);
            HttpContext.Current.Session["ImgGen"] = code.ToUpper();
            int fSize = FontSize;
            int fWidth = fSize + Padding;
            int imageWidth = (int)(code.Length * fWidth) + 4 + Padding * 2;
            int imageHeight = fSize * 2 + Padding;

            System.Drawing.Bitmap image = new System.Drawing.Bitmap(imageWidth, imageHeight);
            Graphics g = Graphics.FromImage(image);
            g.Clear(BackgroundColor);
            Random rand = new Random();

            //給背景添加隨機生成的燥點
            if (this.Chaos)
            {
                Pen pen = new Pen(ChaosColor, 0);
                int c = Length * 100;

                for (int i = 0; i < c; i++)
                {
                    int x = rand.Next(image.Width);
                    int y = rand.Next(image.Height);

                    g.DrawRectangle(pen, x, y, 1, 1);
                }
            }

            int left = 0, top = 0, top1 = 1, top2 = 1;

            int n1 = (imageHeight - FontSize - Padding * 2);
            int n2 = n1 / 4;
            top1 = n2;
            top2 = n2 * 2;

            Font f;
            Brush b;
            int cindex, findex;

            //隨機字體和顏色的驗證碼字符
            for (int i = 0; i < code.Length; i++)
            {
                cindex = rand.Next(Colors.Length - 1);
                findex = rand.Next(Fonts.Length - 1);

                f = new System.Drawing.Font(Fonts[findex], fSize, System.Drawing.FontStyle.Bold);
                b = new System.Drawing.SolidBrush(Colors[cindex]);

                if (i % 2 == 1)
                {
                    top = top2;
                }
                else
                {
                    top = top1;
                }

                left = i * fWidth;

                g.DrawString(code.Substring(i, 1), f, b, left, top);
            }

            //畫一個邊框 邊框顏色為Color.Gainsboro
            g.DrawRectangle(new Pen(Color.Gainsboro, 0), 0, 0, image.Width - 1, image.Height - 1);
            g.Dispose();

            //產生波形
            image = TwistImage(image, false, 0, 0);

            return image;
        }

        public Bitmap CreateImageCode(string code)
        {
            int fSize = FontSize;
            int fWidth = fSize + Padding;

            int imageWidth = (int)(code.Length * fWidth) + 4 + Padding * 2;
            int imageHeight = fSize * 2 + Padding;

            System.Drawing.Bitmap image = new System.Drawing.Bitmap(imageWidth, imageHeight);

            Graphics g = Graphics.FromImage(image);

            g.Clear(BackgroundColor);

            Random rand = new Random();

            //給背景添加隨機生成的燥點  
            if (this.Chaos)
            {

                Pen pen = new Pen(ChaosColor, 0);
                int c = Length * 10;

                for (int i = 0; i < c; i++)
                {
                    int x = rand.Next(image.Width);
                    int y = rand.Next(image.Height);

                    g.DrawRectangle(pen, x, y, 1, 1);
                }
            }

            int left = 0, top = 0, top1 = 1, top2 = 1;

            int n1 = (imageHeight - FontSize - Padding * 2);
            int n2 = n1 / 4;
            top1 = n2;
            top2 = n2 * 2;

            Font f;
            Brush b;

            int cindex, findex;

            //隨機字體和顏色的驗證碼字符  
            for (int i = 0; i < code.Length; i++)
            {
                cindex = rand.Next(Colors.Length - 1);
                findex = rand.Next(Fonts.Length - 1);

                f = new System.Drawing.Font(Fonts[findex], fSize, System.Drawing.FontStyle.Bold);
                b = new System.Drawing.SolidBrush(Colors[cindex]);

                if (i % 2 == 1)
                {
                    top = top2;
                }
                else
                {
                    top = top1;
                }

                left = i * fWidth;

                g.DrawString(code.Substring(i, 1), f, b, left, top);
            }

            //畫一個邊框 邊框顏色為Color.Gainsboro  
            g.DrawRectangle(new Pen(Color.Gainsboro, 0), 0, 0, image.Width - 1, image.Height - 1);
            g.Dispose();

            //產生波形（Add By 51aspx.com）  
            image = TwistImage(image, true, 3, 2);

            return image;
        }

        #endregion

        #region 屬性

        #region 驗證碼長度
        int length = 4;
        public int Length
        {
            get { return length; }
            set { length = value; }
        }
        #endregion

        #region 驗證碼字體大小(為了顯示扭曲效果，默認40像素，可以自行修改)
        int fontSize = 26;
        public int FontSize
        {
            get { return fontSize; }
            set { fontSize = value; }
        }
        #endregion

        #region 邊框補(默認1像素)
        int padding = 2;
        public int Padding
        {
            get { return padding; }
            set { padding = value; }
        }
        #endregion

        #region 是否輸出燥點(默認不輸出)
        bool chaos = true;
        public bool Chaos
        {
            get { return chaos; }
            set { chaos = value; }
        }
        #endregion

        #region 輸出燥點的顏色(默認灰色)
        Color chaosColor = Color.LightGray;
        public Color ChaosColor
        {
            get { return chaosColor; }
            set { chaosColor = value; }
        }
        #endregion

        #region 自定義背景色(默認白色)
        Color backgroundColor = Color.White;
        public Color BackgroundColor
        {
            get { return backgroundColor; }
            set { backgroundColor = value; }
        }
        #endregion

        #region 自定義隨機顏色數組
        Color[] colors = { Color.Black, Color.Black, Color.Black, Color.Black, Color.Black, Color.Black, Color.Black, Color.Black };
        public Color[] Colors
        {
            get { return colors; }
            set { colors = value; }
        }
        #endregion

        #region 自定義字體數組
        string[] fonts = { "華文中宋", "華文中宋" };
        public string[] Fonts
        {
            get { return fonts; }
            set { fonts = value; }
        }
        #endregion

        #region 自定義隨機碼字符串序列(使用逗號分隔)
        string codeSerial = "2,3,4,5,6,7,8,9,a,b,c,d,e,f,g,h,j,k,m,n,p,q,r,s,t,u,v,w,x,y,z,A,B,C,D,E,F,G,H,J,K,L,M,N,P,Q,R,S,T,U,V,W,X,Y,Z";
        public string CodeSerial
        {
            get { return codeSerial; }
            set { codeSerial = value; }
        }
        #endregion
        #endregion

        #region 產生波形濾鏡效果

        private const double PI = 3.1415926535897932384626433832795;
        private const double PI2 = 6.283185307179586476925286766559;

        /// <summary>
        /// 正弦曲線Wave扭曲圖片（Edit By 51aspx.com）
        /// </summary>
        /// <param name="srcBmp">圖片路徑</param>
        /// <param name="bXDir">如果扭曲則選擇為True</param>
        /// <param name="nMultValue">波形的幅度倍數，越大扭曲的程度越高，一般為3</param>
        /// <param name="dPhase">波形的起始相位，取值區間[0-2*PI)</param>
        /// <returns></returns>
        public System.Drawing.Bitmap TwistImage(Bitmap srcBmp, bool bXDir, double dMultValue, double dPhase)
        {
            System.Drawing.Bitmap destBmp = new Bitmap(srcBmp.Width, srcBmp.Height);

            // 將位圖背景填充為白色
            System.Drawing.Graphics graph = System.Drawing.Graphics.FromImage(destBmp);
            graph.FillRectangle(new SolidBrush(System.Drawing.Color.White), 0, 0, destBmp.Width, destBmp.Height);
            graph.Dispose();

            double dBaseAxisLen = bXDir ? (double)destBmp.Height : (double)destBmp.Width;

            for (int i = 0; i < destBmp.Width; i++)
            {
                for (int j = 0; j < destBmp.Height; j++)
                {
                    double dx = 0;
                    dx = bXDir ? (PI2 * (double)j) / dBaseAxisLen : (PI2 * (double)i) / dBaseAxisLen;
                    dx += dPhase;
                    double dy = Math.Sin(dx);

                    // 取得當前點的顏色
                    int nOldX = 0, nOldY = 0;
                    nOldX = bXDir ? i + (int)(dy * dMultValue) : i;
                    nOldY = bXDir ? j : j + (int)(dy * dMultValue);

                    System.Drawing.Color color = srcBmp.GetPixel(i, j);
                    if (nOldX >= 0 && nOldX < destBmp.Width
                     && nOldY >= 0 && nOldY < destBmp.Height)
                    {
                        destBmp.SetPixel(nOldX, nOldY, color);
                    }
                }
            }

            return destBmp;
        }



        #endregion

        #region 生成隨機字符碼
        public string CreateVerifyCode(int codeLen)
        {
            if (codeLen == 0)
            {
                codeLen = Length;
            }

            string[] arr = CodeSerial.Split(',');

            string code = "";

            int randValue = -1;

            Random rand = new Random(unchecked((int)DateTime.Now.Ticks));

            for (int i = 0; i < codeLen; i++)
            {
                randValue = rand.Next(0, arr.Length - 1);

                code += arr[randValue];
            }

            return code;
        }
        public string CreateVerifyCode()
        {
            return CreateVerifyCode(0);
        }
        #endregion
    }

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驗證碼插件 vercode.js - 動態詳情