技术汇总：第七章：三种验证方式-阿里云开发者社区

第一种验证码

b.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=9; IE=8; IE=7; IE=EDGE">
    <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" />
    <title>设置-个人信息</title>
</head>
<body>
</body>
  <script type="text/javascript" src="jquery.min.js" ></script>
  <script type="text/javascript" src="a.js" ></script>
<div class="code">
  <input type="text" value="" placeholder="请输入验证码（不区分大小写）" class="input-val">
  <canvas id="canvas" width="100" height="30"></canvas>
  <button class="btn">提交</button>
</div>
</html>

a.js

 $(function(){
  var show_num = [];
  draw(show_num);
  $("#canvas").on('click',function(){
   draw(show_num);
  })
  $(".btn").on('click',function(){
   var val = $(".input-val").val().toLowerCase();
   var num = show_num.join("");
   if(val==''){
    alert('请输入验证码！');
   }else if(val == num){
    alert('提交成功！');
    $(".input-val").val('');
    // draw(show_num);
   }else{
    alert('验证码错误！请重新输入！');
    $(".input-val").val('');
    // draw(show_num);
   }
  })
 })
 //生成并渲染出验证码图形
 function draw(show_num) {
  var canvas_width=$('#canvas').width();
  var canvas_height=$('#canvas').height();
  var canvas = document.getElementById("canvas");//获取到canvas的对象，演员
  var context = canvas.getContext("2d");//获取到canvas画图的环境，演员表演的舞台
  canvas.width = canvas_width;
  canvas.height = canvas_height;
  var sCode = "a,b,c,d,e,f,g,h,i,j,k,m,n,p,q,r,s,t,u,v,w,x,y,z,A,B,C,E,F,G,H,J,K,L,M,N,P,Q,R,S,T,W,X,Y,Z,1,2,3,4,5,6,7,8,9,0";
  var aCode = sCode.split(",");
  var aLength = aCode.length;//获取到数组的长度
  for (var i = 0; i < 4; i++) { //这里的for循环可以控制验证码位数（如果想显示6位数，4改成6即可）
   var j = Math.floor(Math.random() * aLength);//获取到随机的索引值
   // var deg = Math.random() * 30 * Math.PI / 180;//产生0~30之间的随机弧度
   var deg = Math.random() - 0.5; //产生一个随机弧度
   var txt = aCode[j];//得到随机的一个内容
   show_num[i] = txt.toLowerCase();
   var x = 10 + i * 20;//文字在canvas上的x坐标
   var y = 20 + Math.random() * 8;//文字在canvas上的y坐标
   context.font = "bold 23px 微软雅黑";
   context.translate(x, y);
   context.rotate(deg);
   context.fillStyle = randomColor();
   context.fillText(txt, 0, 0);
   context.rotate(-deg);
   context.translate(-x, -y);
  }
  for (var i = 0; i <= 5; i++) { //验证码上显示线条
   context.strokeStyle = randomColor();
   context.beginPath();
   context.moveTo(Math.random() * canvas_width, Math.random() * canvas_height);
   context.lineTo(Math.random() * canvas_width, Math.random() * canvas_height);
   context.stroke();
  }
  for (var i = 0; i <= 30; i++) { //验证码上显示小点
   context.strokeStyle = randomColor();
   context.beginPath();
   var x = Math.random() * canvas_width;
   var y = Math.random() * canvas_height;
   context.moveTo(x, y);
   context.lineTo(x + 1, y + 1);
   context.stroke();
  }
 }
 //得到随机的颜色值
 function randomColor() {
  var r = Math.floor(Math.random() * 256);
  var g = Math.floor(Math.random() * 256);
  var b = Math.floor(Math.random() * 256);
  return "rgb(" + r + "," + g + "," + b + ")";
 }

jquery.min.js自己搞吧

第二种验证

index.html

<!DOCTYPE html>
<html>
<head>
<title>jQuery拖动滑块验证码代码</title>
<meta charset="utf-8">
<link href="css/drag.css" rel="stylesheet" type="text/css">
<script src="js/jquery-1.7.2.min.js" type="text/javascript"></script>
<script src="js/drag.js" type="text/javascript"></script>
</head>
<body>
<center><br><br><br><div id="drag"></div></center>
<script type="text/javascript">
$('#drag').drag();
</script>
<div style="text-align:center;margin:50px 0; font:normal 14px/24px 'MicroSoft YaHei';">
</div>
</body>
</html>

js/drag.js

/* 
 * drag 1.0
 * create by tony@jentian.com
 * date 2015-08-18
 * 拖动滑块
 */
(function($){
    $.fn.drag = function(options){
        var x, drag = this, isMove = false, defaults = {
        };
        var options = $.extend(defaults, options);
        //添加背景，文字，滑块
        var html = '<div class="drag_bg"></div>'+
                    '<div class="drag_text" onselectstart="return false;" unselectable="on">拖动滑块验证</div>'+
                    '<div class="handler handler_bg"></div>';
        this.append(html);
        var handler = drag.find('.handler');
        var drag_bg = drag.find('.drag_bg');
        var text = drag.find('.drag_text');
        var maxWidth = drag.width() - handler.width();  //能滑动的最大间距
        //鼠标按下时候的x轴的位置
        handler.mousedown(function(e){
            isMove = true;
            x = e.pageX - parseInt(handler.css('left'), 10);
        });
        //鼠标指针在上下文移动时，移动距离大于0小于最大间距，滑块x轴位置等于鼠标移动距离
        $(document).mousemove(function(e){
            var _x = e.pageX - x;
            if(isMove){
                if(_x > 0 && _x <= maxWidth){
                    handler.css({'left': _x});
                    drag_bg.css({'width': _x});
                }else if(_x > maxWidth){  //鼠标指针移动距离达到最大时清空事件
                    dragOk();
                }
            }
        }).mouseup(function(e){
            isMove = false;
            var _x = e.pageX - x;
            if(_x < maxWidth){ //鼠标松开时，如果没有达到最大距离位置，滑块就返回初始位置
                handler.css({'left': 0});
                drag_bg.css({'width': 0});
            }
        });
        //清空事件
        function dragOk(){
            handler.removeClass('handler_bg').addClass('handler_ok_bg');
            text.text('验证通过');
            drag.css({'color': '#fff'});
            handler.unbind('mousedown');
            $(document).unbind('mousemove');
            $(document).unbind('mouseup');
        }
    };
})(jQuery);

js/ jquery-1.7.2.min.js自己搞把

css/drag.css

#drag{ 
    position: relative;
    background-color: #e8e8e8;
    width: 300px;
    height: 34px;
    line-height: 34px;
    text-align: center;
}
#drag .handler{
    position: absolute;
    top: 0px;
    left: 0px;
    width: 40px;
    height: 32px;
    border: 1px solid #ccc;
    cursor: move;
}
.handler_bg{
    background: #fff url("data:image/png;base64,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") no-repeat center;
}
.handler_ok_bg{
    background: #fff url("data:image/png;base64,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") no-repeat center;
}
#drag .drag_bg{
    background-color: #7ac23c;
    height: 34px;
    width: 0px;
}
#drag .drag_text{
    position: absolute;
    top: 0px;
    width: 300px;
    -moz-user-select: none;
    -webkit-user-select: none;
    user-select: none;
    -o-user-select:none;
    -ms-user-select:none; 
}

第三种验证

index.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>滑动拼图验证码</title>
  <link rel="stylesheet" href="jigsaw.css">
  <style>
    .container {
      width: 310px;
      margin: 100px auto;
    }
    input {
      display: block;
      width: 290px;
      line-height: 40px;
      margin: 10px 0;
      padding: 0 10px;
      outline: none;
      border:1px solid #c8cccf;
      border-radius: 4px;
      color:#6a6f77;
    }
    #msg {
      width: 100%;
      line-height: 40px;
      font-size: 14px;
      text-align: center;
    }
    a:link,a:visited,a:hover,a:active {
      margin-left: 100px;
      color: #0366D6;
    }
  </style>
</head>
<body>
<div class="container">
  <input value="admin" readonly/>
  <input type="password" value="1234567890" readonly/>
  <div id="captcha" style="position: relative"></div>
  <div id="msg"></div>
</div>
<script src="jigsaw.js"></script>
<script>
  jigsaw.init(document.getElementById('captcha'), function () {
    document.getElementById('msg').innerHTML = '登录成功！'
  })
</script>
</body>
</html>

jigsaw.css

.block {
  position: absolute;
  left: 0;
  top: 0;
}
.sliderContainer {
  position: relative;
  text-align: center;
  width: 310px;
  height: 40px;
  line-height: 40px;
  margin-top: 15px;
  background: #f7f9fa;
  color: #45494c;
  border: 1px solid #e4e7eb;
}
.sliderContainer_active .slider {
  height: 38px;
  top: -1px;
  border: 1px solid #1991FA;
}
.sliderContainer_active .sliderMask {
  height: 38px;
  border-width: 1px;
}
.sliderContainer_success .slider {
  height: 38px;
  top: -1px;
  border: 1px solid #52CCBA;
  background-color: #52CCBA !important;
}
.sliderContainer_success .sliderMask {
  height: 38px;
  border: 1px solid #52CCBA;
  background-color: #D2F4EF;
}
.sliderContainer_success .sliderIcon {
  background-position: 0 0 !important;
}
.sliderContainer_fail .slider {
  height: 38px;
  top: -1px;
  border: 1px solid #f57a7a;
  background-color: #f57a7a !important;
}
.sliderContainer_fail .sliderMask {
  height: 38px;
  border: 1px solid #f57a7a;
  background-color: #fce1e1;
}
.sliderContainer_fail .sliderIcon {
  background-position: 0 -83px !important;
}
.sliderContainer_active .sliderText, .sliderContainer_success .sliderText, .sliderContainer_fail .sliderText {
  display: none;
}
.sliderMask {
  position: absolute;
  left: 0;
  top: 0;
  height: 40px;
  border: 0 solid #1991FA;
  background: #D1E9FE;
}
.slider {
  position: absolute;
  top: 0;
  left: 0;
  width: 40px;
  height: 40px;
  background: #fff;
  box-shadow: 0 0 3px rgba(0, 0, 0, 0.3);
  cursor: pointer;
  transition: background .2s linear;
}
.slider:hover {
  background: #1991FA;
}
.slider:hover .sliderIcon {
  background-position: 0 -13px;
}
.sliderIcon {
  position: absolute;
  top: 15px;
  left: 13px;
  width: 14px;
  height: 10px;
  background: url(http://cstaticdun.126.net//2.6.3/images/icon_light.f13cff3.png) 0 -26px;
  background-size: 34px 471px;
}
.refreshIcon {
  position: absolute;
  right: 0;
  top: 0;
  width: 34px;
  height: 34px;
  cursor: pointer;
  background: url(http://cstaticdun.126.net//2.6.3/images/icon_light.f13cff3.png) 0 -437px;
  background-size: 34px 471px;
}

jigsaw.js

(function (window) {
  const l = 42, // 滑块边长
    r = 10, // 滑块半径
    w = 310, // canvas宽度
    h = 155, // canvas高度
    PI = Math.PI
  const L = l + r * 2 // 滑块实际边长
  function getRandomNumberByRange(start, end) {
    return Math.round(Math.random() * (end - start) + start)
  }
  function createCanvas(width, height) {
    const canvas = createElement('canvas')
    canvas.width = width
    canvas.height = height
    return canvas
  }
  function createImg(onload) {
    const img = createElement('img')
    img.crossOrigin = "Anonymous"
    img.onload = onload
    img.onerror = () => {
      img.src = getRandomImg()
    }
    img.src = getRandomImg()
    return img
  }
  function createElement(tagName) {
    return document.createElement(tagName)
  }
  function addClass(tag, className) {
    tag.classList.add(className)
  }
  function removeClass(tag, className) {
    tag.classList.remove(className)
  }
  function getRandomImg() {
    return 'https://picsum.photos/300/150/?image=' + getRandomNumberByRange(0, 100)
  }
  function draw(ctx, operation, x, y) {
    ctx.beginPath()
    ctx.moveTo(x, y)
    ctx.lineTo(x + l / 2, y)
    ctx.arc(x + l / 2, y - r + 2, r, 0, 2 * PI)
    ctx.lineTo(x + l / 2, y)
    ctx.lineTo(x + l, y)
    ctx.lineTo(x + l, y + l / 2)
    ctx.arc(x + l + r - 2, y + l / 2, r, 0, 2 * PI)
    ctx.lineTo(x + l, y + l / 2)
    ctx.lineTo(x + l, y + l)
    ctx.lineTo(x, y + l)
    ctx.lineTo(x, y)
    ctx.fillStyle = '#fff'
    ctx[operation]()
    ctx.beginPath()
    ctx.arc(x, y + l / 2, r, 1.5 * PI, 0.5 * PI)
    ctx.globalCompositeOperation = "xor"
    ctx.fill()
  }
  function sum(x, y) {
    return x + y
  }
  function square(x) {
    return x * x
  }
  class jigsaw {
    constructor(el, success, fail) {
      this.el = el
      this.success = success
      this.fail = fail
    }
    init() {
      this.initDOM()
      this.initImg()
      this.draw()
      this.bindEvents()
    }
    initDOM() {
      const canvas = createCanvas(w, h) // 画布
      const block = canvas.cloneNode(true) // 滑块
      const sliderContainer = createElement('div')
      const refreshIcon = createElement('div')
      const sliderMask = createElement('div')
      const slider = createElement('div')
      const sliderIcon = createElement('span')
      const text = createElement('span')
      block.className = 'block'
      sliderContainer.className = 'sliderContainer'
      refreshIcon.className = 'refreshIcon'
      sliderMask.className = 'sliderMask'
      slider.className = 'slider'
      sliderIcon.className = 'sliderIcon'
      text.innerHTML = '向右滑动滑块填充拼图'
      text.className = 'sliderText'
      const el = this.el
      el.appendChild(canvas)
      el.appendChild(refreshIcon)
      el.appendChild(block)
      slider.appendChild(sliderIcon)
      sliderMask.appendChild(slider)
      sliderContainer.appendChild(sliderMask)
      sliderContainer.appendChild(text)
      el.appendChild(sliderContainer)
      Object.assign(this, {
        canvas,
        block,
        sliderContainer,
        refreshIcon,
        slider,
        sliderMask,
        sliderIcon,
        text,
        canvasCtx: canvas.getContext('2d'),
        blockCtx: block.getContext('2d')
      })
    }
    initImg() {
      const img = createImg(() => {
        this.canvasCtx.drawImage(img, 0, 0, w, h)
        this.blockCtx.drawImage(img, 0, 0, w, h)
        const y = this.y - r * 2 + 2
        const ImageData = this.blockCtx.getImageData(this.x, y, L, L)
        this.block.width = L
        this.blockCtx.putImageData(ImageData, 0, y)
      })
      this.img = img
    }
    draw() {
      // 随机创建滑块的位置
      this.x = getRandomNumberByRange(L + 10, w - (L + 10))
      this.y = getRandomNumberByRange(10 + r * 2, h - (L + 10))
      draw(this.canvasCtx, 'fill', this.x, this.y)
      draw(this.blockCtx, 'clip', this.x, this.y)
    }
    clean() {
      this.canvasCtx.clearRect(0, 0, w, h)
      this.blockCtx.clearRect(0, 0, w, h)
      this.block.width = w
    }
    bindEvents() {
      this.el.onselectstart = () => false
      this.refreshIcon.onclick = () => {
        this.reset()
      }
      let originX, originY, trail = [], isMouseDown = false
      this.slider.addEventListener('mousedown', function (e) {
        originX = e.x, originY = e.y
        isMouseDown = true
      })
      document.addEventListener('mousemove', (e) => {
        if (!isMouseDown) return false
        const moveX = e.x - originX
        const moveY = e.y - originY
        if (moveX < 0 || moveX + 38 >= w) return false
        this.slider.style.left = moveX + 'px'
        var blockLeft = (w - 40 - 20) / (w - 40) * moveX
        this.block.style.left = blockLeft + 'px'
        addClass(this.sliderContainer, 'sliderContainer_active')
        this.sliderMask.style.width = moveX + 'px'
        trail.push(moveY)
      })
      document.addEventListener('mouseup', (e) => {
        if (!isMouseDown) return false
        isMouseDown = false
        if (e.x == originX) return false
        removeClass(this.sliderContainer, 'sliderContainer_active')
        this.trail = trail
        const {spliced, TuringTest} = this.verify()
        if (spliced) {
          if (TuringTest) {
            addClass(this.sliderContainer, 'sliderContainer_success')
            this.success && this.success()
          } else {
            addClass(this.sliderContainer, 'sliderContainer_fail')
            this.text.innerHTML = '再试一次'
            this.reset()
          }
        } else {
          addClass(this.sliderContainer, 'sliderContainer_fail')
          this.fail && this.fail()
          setTimeout(() => {
            this.reset()
          }, 1000)
        }
      })
    }
    verify() {
      const arr = this.trail // 拖动时y轴的移动距离
      const average = arr.reduce(sum) / arr.length // 平均值
      const deviations = arr.map(x => x - average) // 偏差数组
      const stddev = Math.sqrt(deviations.map(square).reduce(sum) / arr.length) // 标准差
      const left = parseInt(this.block.style.left)
      return {
        spliced: Math.abs(left - this.x) < 10,
        TuringTest: average !== stddev, // 只是简单的验证拖动轨迹，相等时一般为0，表示可能非人为操作
      }
    }
    reset() {
      this.sliderContainer.className = 'sliderContainer'
      this.slider.style.left = 0
      this.block.style.left = 0
      this.sliderMask.style.width = 0
      this.clean()
      this.img.src = getRandomImg()
      this.draw()
    }
  }
  window.jigsaw = {
    init: function (element, success, fail) {
      new jigsaw(element, success, fail).init()
    }
  }
}(window))

技术汇总：第七章：三种验证方式

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