【知识分享】html+js实现系统拍照上传功能

html+js实现系统拍照上传功能
<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta name="Keywords" content=""/>
    <meta name="Description" content=""/>
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"/>
    <meta http-equiv="Cache-Control" content="no-transform"/>
    <meta http-equiv="Cache-Control" content="no-siteapp"/>
    <meta http-equiv="content-language" content="zh-CN"/>
    <meta name="applicable-device" content="pc">
    <meta name="mobile-agent" content="format=html5;url=http: "/>
    <link rel="alternate" media="only screen and(max-width: 640px)" href=" "/>
    <title>新闻推荐系统</title>
    <link rel="stylesheet" type="text/css" href="file/css/pc_common.css"/>
    <style>
        #capture{
            position: absolute;
            right: 190px;
            bottom: -40px;

        }
        #video{
            position: absolute;
            right: 0;
            top: 0;
        }
        #img{
            position: absolute;
            left: 0;
            top: 0;
        }
        .auto{
            position: absolute;
            left: 50%;
            top: 50%;
            height: 320px;
            margin-top: -160px;
        }
        #sure{
            position: absolute;
            left: 210px;
            bottom: -40px;

        }
        button{
            cursor: pointer;
            margin: 0 auto;
            border: 1px solid #f0f0f0;
            background: #5CACEE;
            color: #FFF;
            width: 100px;
            height: 36px;
            line-height: 36px;
            border-radius: 8px;
            text-align: center;
            /*禁止选择*/
            -webkit-touch-callout: none; /* iOS Safari */
            -webkit-user-select: none; /* Chrome/Safari/Opera */
            -khtml-user-select: none; /* Konqueror */
            -moz-user-select: none; /* Firefox */
            -ms-user-select: none; /* Internet Explorer/Edge */
            user-select: none; /* Non-prefixed version, currently not supported by any browser */
        }

    </style>
</head>

<body>
<div id="rrapp" v-cloak>
    <!--header-->
    <div class="city_wrap">
        <div class="city">
            <div style="text-align: left;width: 50%;float: left;"><a href="index.html">基于web的新闻推荐系统</a></div>
            <div style="text-align: right;width: 50%;float: right;" id="myuser">
                <a href="login.html">登录</a>| <a href="login.html">注册</a>
            </div>
        </div>
    </div>
    <!--logo and search-->
    <div class="logo_search i_logo_search">
        <a href="index.html" class="fl"><img src="file/img/pc/logo.png"/></a>
        <div class="fr">
            <input type="text" name="q" value="" placeholder="请输入搜索关键词" class="keywords" v-model="search_key"
                   @keyup.enter="search_index"/>
            <input type="submit" name="submit" value="" class="ser_btn"/>
            <a  href="paizhao.html">拍照搜索</a>
        </div>
    </div>

    <!--nav-->
    <div class="nav_wrap">
        <div class="change nav">
            <ul class="clearbox">
                <li class="a">
                    <h2>校园趣事</h2>
                    <div class="link">
                        <a href="list.html?type=1" class="cg">学园风光</a>
                        <a href="list.html?type=1" class="cg">教学资讯</a>
                    </div>
                </li>
                <li class="b">
                    <h2>文化传承</h2>
                    <div class="link">
                        <a href="list.html?type=2">言传身教</a>
                        <a href="list.html?type=2">创新建设</a>
                        <a href="list.html?type=2">国学文化</a>
                        <a href="list.html?type=2" class="cg">礼义廉耻</a>
                        <a href="list.html?type=2" class="cg">忠孝仁爱</a>
                        <a href="list.html?type=2" class="cg">爱国教育</a>
                    </div>
                </li>
                <li class="c">
                    <h2>健康教育</h2>
                    <div class="link">
                        <a href="list.html?type=3">体育锻炼</a>
                        <a href="list.html?type=3">心理健康</a>
                        <a href="list.html?type=3">素质涵养</a>
                        <a href="list.html?type=3">心理辅导</a>
                    </div>
                </li>
                <li class="d">
                    <h2>少年国学</h2>
                    <div class="link">
                        <a href="list.html?type=4" class="cg">考古专业</a>
                        <a href="list.html?type=4" class="cg">唐代文化</a>
                        <a href="list.html?type=4" class="cg">宋朝诗词</a>
                        <a href="list.html?type=4" class="cg">元朝文欢</a>
                        <a href="list.html?type=4">明清</a>
                    </div>
                </li>
                <li class="e">
                    <h2>才智未来</h2>
                    <div class="link">
                        <a href="list.html?type=5">创新能力</a>
                        <a href="list.html?type=5">机器学习</a>
                    </div>
                </li>
            </ul>
        </div>
    </div>
</div>

<div class="auto">
    <video id="video" width="480" height="320" autoplay></video>
    <canvas id="canvas" width="480" height="320" style="display: none;"></canvas>
    <img src="1714447612266.jpg" id="img" width="480" height="320" style="margin-left: 20px;">
    <div>
        <button id="capture" title="点击进行拍照">拍照</button>
    </div>
    <div>
        <button id="sure" title="是否用这张图片进行验证">确认</button>
    </div>
</div>
<!--footer-->
<script src="file/js/libs/jquery-1.11.0.min.js"></script>
<script src="file/js/libs/jquery.SuperSlide.2.1.1.js"></script>
<script src="file/js/libs/jquery.nicescroll.js"></script>
<script src="file/js/libs/pc_common.js"></script>
<script type="text/javascript" src="file/js/libs/vue.min.js"></script>
<script type="text/javascript" src="file/js/ref/comm.js"></script>
<!--<script type="text/javascript" src="file/js/ref/recomm.js"></script>-->
<script type="text/javascript" src="file/js/ref/index.js"></script>
<script>
    var file ,stream;
    //访问用户媒体设备的兼容方法
    function getUserMedia(constraints, success, error) {
        if (navigator.mediaDevices.getUserMedia) {
            //最新的标准API
            navigator.mediaDevices.getUserMedia(constraints).then(success).catch(error);
        } else if (navigator.webkitGetUserMedia) {
            //webkit核心浏览器
            navigator.webkitGetUserMedia(constraints,success, error)
        } else if (navigator.mozGetUserMedia) {
            //firfox浏览器
            navigator.mozGetUserMedia(constraints, success, error);
        } else if (navigator.getUserMedia) {
            //旧版API
            navigator.getUserMedia(constraints, success, error);
        }
    }

    let video = document.getElementById('video');
    let canvas = document.getElementById('canvas');
    let context = canvas.getContext('2d');

    function success(stream) {
        //兼容webkit核心浏览器
        let CompatibleURL = window.URL || window.webkitURL;
        //将视频流设置为video元素的源
        console.log(stream);
        stream = stream;
        //video.src = CompatibleURL.createObjectURL(stream);
        video.srcObject = stream;
        video.play();
    }

    function error(error) {
        console.log(`访问用户媒体设备失败${error.name}, ${error.message}`);
    }

    if (navigator.mediaDevices.getUserMedia || navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia) {
        //调用用户媒体设备, 访问摄像头
        getUserMedia({video : {width: 480, height: 320}}, success, error);
    } else {
        alert('不支持访问用户媒体');
    }
    // base64转文件

    document.getElementById('capture').addEventListener('click', function () {
        context.drawImage(video, 0, 0, 480, 320);
        // 获取图片base64链接
        var image = canvas.toDataURL('image/png');
        // 定义一个img
        var img = document.getElementById("img");
        //设置属性和src
        //img.id = "imgBoxxx";
        img.src = image;
        //将图片添加到页面中
        //document.body.appendChild(img);
        function dataURLtoFile(dataurl, filename) {
            var arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
                bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);
            while (n--) {
                u8arr[n] = bstr.charCodeAt(n);
            }
            file = new File([u8arr], filename, {type: mime});
            return new File([u8arr], filename, {type: mime});
        }
        console.log(dataURLtoFile(image, 'aa.png'));
    })

    document.getElementById('sure').addEventListener('click', function () {
        window.location.href="search.html?keywords=''"
        var formData = new FormData();
        formData.append("file",file);
        $.ajax({
            type: "POST", // 数据提交类型
            url: "***********", // 发送地址
            data: formData, //发送数据
            async: true, // 是否异步
            processData: false, //processData 默认为false，当设置为true的时候,jquery ajax 提交的时候不会序列化 data，而是直接使用data
            contentType: false,
            success:function(data){
                if(data.code === 200){
                    console.log(`${data.message}`);
                }else{
                    console.log(`${data.message}`);
                }
            },
            error:function(e){
                self.$message.warning(`${e}`);
                //console.log("不成功"+e);
            }
        });
        stream.getTracks()[0].stop();//结束关闭流

    })
</script>
</body>
</html>
</body>
</html>

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