nodejs实现黑名单中间件设计

var mongoose = require('mongoose');
var Schema = mongoose.Schema;

//1.短暂屏蔽 2.永久屏蔽
var degree = {TEMP:1, FOREVER:2};

/**
 * 黑名单
 * @type {Schema}
 *
 * @param ip {String} 黑名单Ip
 * @param createAt {Date} 创建时间
 * @param expireTime {Date} 如果是短暂屏蔽，屏蔽到期时间
 * @param forbiddenDegree {Number} 屏蔽级别 1.短暂屏蔽 2.永久屏蔽
 * @param reason {String} 屏蔽原因
 */
var BlackList = new Schema({
    ip:{
        type: String,
        index:true
    },
    createAt:{
        type: Date,
        default: Date.now
    },
    expireTime:{
        type: Date
    },
    forbiddenDegree:{
        type: Number,
        default:degree.TEMP
    },
    reason:{
        type: String,
        default: '请求次数频繁'
    }
});

mongoose.model('BlackList', BlackList);

'use strict';

var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var ObjectId = Schema.ObjectId;

/**
 * 记录参与调查问卷的回复与Ip
 * @type {Schema}
 *
 * @param answerId {ObjectId} 回复Id
 * @param createAt {Date} 创建时间
 * @param ip {String} 参与回复的人Ip
 */
var IpAnswerLog = new Schema({
    answerId: {
        type: ObjectId
    },
    createAt: {
        type: Date,
        default:Date.now
    },
    ip:{
        type: String,
        index:true
    }
});

mongoose.model('IpAnswerLog', IpAnswerLog);

var IpAnswerLog = require('../models').IpAnswerLog;

/**
 * 新建并保存
 * @param ipAnswerLog {Schema or dict}
 * @param callback
 */
var newAndSave = function(ipAnswerLog, callback){
    if(ipAnswerLog instanceof IpAnswerLog){
        ipAnswerLog.save(callback);
    }else{
        var m = new IpAnswerLog(ipAnswerLog);
        m.save(callback);
    }
}

/**
 * 一分钟内回复数
 * @param ip
 * @param callback
 */
var countOneMinuteAnswer = function(ip, callback){
    var endTime = Date.now();
    var beginTime = endTime - 1000*60*1;
    countIpAnswerByTime(beginTime, endTime, ip, callback);
}

/**
 * 一小时内回复数字
 * @param ip
 * @param callback
 */
var countOneHourAnswer = function(ip, callback){
    var endTime = Date.now();
    var beginTime = endTime - 1000*60*60*1;
    countIpAnswerByTime(beginTime, endTime, ip, callback);
}

/**
 * 一天内回复
 * @param ip
 * @param callback
 */
var countOneDayAnswer = function(ip, callback){
    var endTime = Date.now();
    var beginTime = endTime - 1000*60*60*24;
    countIpAnswerByTime(beginTime, endTime, ip, callback);
}

/**
 * 计算某段时间内回复数
 * @param beginTime {Number} 开始时间 时间戳
 * @param endTime   {Number} 结束时间 如果为null，使用当前时间 时间戳
 * @param ip    {String} Ip地址
 * @param callback
 */
var countIpAnswerByTime = function(beginTime, endTime, ip, callback){
    if(!endTime){
        endTime = Date.now();
    }
    IpAnswerLog.count({ip:ip, '$and':{$lt:beginTime, $gt:endTime}}, callback);
}

exports.countIpAnswerByTime =countIpAnswerByTime;
exports.countOneDayAnswer = countOneDayAnswer;
exports.countOneHourAnswer = countOneHourAnswer;
exports.countOneMinuteAnswer = countOneMinuteAnswer;
exports.newAndSave = newAndSave;

/**
 * 新建并保存
 * @param backList {BlackList} or {dict} 黑名单数据
 * @param callback
 */
var newAndSave = function(backList, callback){
    if(backList instanceof BlackList){
        backList.save(callback);
    }else{
        var m = new BlackList(backList);
        m.save(callback);
    }
}

/**
 * 禁用Ip访问一小时
 * @param ip {String}
 * @param callback
 */
var newAndSaveOneHourTempForbidden = function(ip, callback){
    var expireTime = Date.now() + 1000*60*60;
    newAndSaveTempForbidden(ip,expireTime, callback);
}

/**
 * 禁用一天
 * @param ip {String}
 * @param callback
 */
var newAndSaveOneDayTempForbidden = function(ip, callback){
    var expireTime = Date.now() + 1000*60*60*24;
    newAndSaveTempForbidden(ip, expireTime, callback);
}

/**
 * 新建临时黑名单
 * @param ip {String}
 * @param expireTime {Number} 到期时间
 * @param callback
 */
var newAndSaveTempForbidden = function(ip, expireTime,callback){
    var blackList = new BlackList({ip:ip, expireTime:expireTime, forbiddenDegree:1});
    newAndSave(blackList, callback);
}

/**
 * 新建并保存永久黑名单
 * @param ip
 * @param callback
 */
var newAndSaveForeverForbidden = function(ip, callback){
    var blackList = new BlackList({ip:ip, forbiddenDegree:2});
    newAndSave(blackList, callback);
}

/**
 * 判断是否在黑名单中
 * @param ip {String} Ip地址
 * @param callback
 */
var isInBlackList = function(ip, callback){
    getBlackListByIp(ip, function(err, blackList){
        if(err){
            callback(err);
        }else if(blackList){
            var currentDate = Date.now();
            if(blackList.forbiddenDegree ===1 && blackList.expireTime> currentDate){
                removeBlackListByIp(ip, function(err){
                    if(err){
                        callback(err);
                    }else{
                        callback(null, false);
                    }
                })
            }else{
                callback(null, true);
            }
        }else{
            callback(null, false);
        }
    })
}

/**
 * 通过Ip获取黑名单条目
 * @param ip
 * @param callback
 */
var getBlackListByIp = function(ip, callback){
    BlackList.findOne({ip:ip}, callback);
}

/**
 * 根据Ip删除黑名单
 * @param ip
 * @param callback
 */
var removeBlackListByIp = function(ip, callback){
    getBlackListByIp(ip, function(err, blackList){
        if(err){
            callback(err);
        }else if(blackList){
            blackList.remove(callback);
        }else{
            callback(null,null);
        }
    })
}

exports.newAndSave = newAndSave;
exports.isInBlackList = isInBlackList;
exports.getBlackListByIp = getBlackListByIp;
exports.removeBlackListByIp = removeBlackListByIp;
exports.newAndSaveOneHourTempForbidden = newAndSaveOneHourTempForbidden;
exports.newAndSaveOneDayTempForbidden = newAndSaveOneDayTempForbidden;
exports.newAndSaveForeverForbidden = newAndSaveForeverForbidden;
exports.newAndSaveTempForbidden = newAndSaveTempForbidden;

var BlackListProxy = require('../../proxy').BlackListPorxy;
var IpAnswerLogProxy = require('../../proxy').IpAnswerLogProxy;
var EventProxy = require('eventproxy');

/**
 * 判断是否需要将Ip移动至黑名单中
 * @param req
 * @param res
 * @param next
 */
var isNeedMoveToBlackList = function(req, res, next){
    var ip = req.ip;
    //判断是否在黑名单中
    requireNotInBlackList(req, res, function(){
        var ep = new EventProxy();
        ep.fail(next);

        ep.all('minuteCount', 'hourCount', 'dayCount', function(minuteCount, hourCount, dayCount){
            if(minuteCount > 10){
                BlackListProxy.newAndSaveOneHourTempForbidden(ip, function(err, blackList){
                    if(err){
                        return next(err);
                    }else{
                        return res.send('提交过于频繁,1小时后重试!');
                    }
                });
            }else if(hourCount > 100){
                BlackListProxy.newAndSaveOneDayTempForbidden(ip, function(err, blackList){
                    if(err){
                        return next(err);
                    }else{
                        return res.send('提交过于频繁,1天后重试!');
                    }
                })
            }else if(dayCount > 1000){
                BlackListProxy.newAndSaveOneDayTempForbidden(ip, function(err, blackList){
                    if(err){
                        return next(err);
                    }else{
                        return res.send('提交过于频繁，1天后重试！');
                    }
                })
            }else{
                return next();
            }
        })

        IpAnswerLogProxy.countOneMinuteAnswer(ip,ep.done('minuteCount'));
        IpAnswerLogProxy.countOneHourAnswer(ip, ep.done('hourCount'));
        IpAnswerLogProxy.countOneDayAnswer(ip, ep.done('dayCount'));
    });
}

/**
 * 中间件 要求Ip不在黑名单中
 * @param req
 * @param res
 * @param next
 */
var requireNotInBlackList = function(req, res, next){
    var ip = req.ip;
    BlackListProxy.isInBlackList(ip, function(err, result){
        if(err){
            next(err);
        }else if(result){
            return res.send('您的Ip禁止提交,如有疑问请联系lihui.wang@tulingdao.com');
        }else{
            next();
        }
    })
}

exports.isNeedMoveToBlackList = isNeedMoveToBlackList;
exports.requireNotInBlackList = requireNotInBlackList;