python 轮询，长轮询

轮询相关

用于消息和投票等
轮询

1.采用js 定时请求。
html
<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <style>
        li{
            cursor: pointer;
        }
    </style>
</head>
<body>
    <ul id="userList">
        {% for key,val in users.items() %}
            <li uid="{{key}}">{{val.name}} ({{val.count}})</li>
        {% endfor %}
    </ul>

    <script src="https://cdn.bootcss.com/jquery/3.3.0/jquery.min.js"></script>
    <script>

        $(function () {
            $('#userList').on('dblclick','li',function () {
                var uid = $(this).attr('uid');
                $.ajax({
                    url:'/vote',
                    type:'POST',
                    data:{uid:uid},
                    success:function (arg) {
                        console.log(arg);
                    }
                })
            });

        });


        /*
        获取投票信息
         */
        function get_vote() {
            $.ajax({
                url:'/get/vote',
                type:"GET",
                dataType:'JSON',
                success:function (arg) {
                    $('#userList').empty();
                    $.each(arg,function (k,v) {
                        var li = document.createElement('li');
                        li.setAttribute('uid',k);
                        li.innerText = v.name + "(" + v.count + ')' ;
                        $('#userList').append(li);
                    })

                }
            })
        }


        setInterval(get_vote,3000);

    </script>
</body>
</html>
View Code