Question

nodejs怎么获取当前请求的日志

Answer 1

function readLog(date,type，operation){//函数接受3个参数，日期、精度(天时分秒)和操作（查找、刷新或者默认）        if(date){        //如果有时间参数则对时间参数进行处理（一般日志名称都是时间加类型）            var dataStr = arguments[0];            var date = dataStr.slice(0,10);            var hour = dataStr.slice(11,13);            var minute = dataStr.slice(11,16);            var second =dataStr.slice(11,19);            var type = arguments[1];            //获取精度
        }else{        //若无时间参数则获取当前时间，然后精度默认            var date = new Date(+new Date()+8*3600*1000).toISOString().replace(/T/g,' ').replace(/\.[\d]{3}Z/,'').slice(0,10);            var type=null;
        }        var op = arguments[2];        var countResult = 0;        //对日志结果进行统计        var logPath = appDirName.slice(0,-3)+'log\\'+'ivsvr_'+date+'.log';        //拼接日志文件名称        var logStr = '';
        fs.stat(logPath, function (err, stats) {        //获取对应的日志文件状态        if(err){        //日志不存在或者异常处理信息
            $('#logTipInfo tr td').html('无日志信息可供查看');            console.log(err);
        }else{            var lineCount = 0;            var readline = require('readline');            var fReadName = logPath;            var fRead = fs.createReadStream(fReadName);            var objReadline = readline.createInterface({                input: fRead,
            });            //按行读取日志
            objReadline.on('line', (line)=>{                var itemStr = $.trim(line);                var time = itemStr.slice(0,19);                var content = itemStr.substr(20);                if(!time || !content){return;}

                ++ lineCount;                //计数行数                var matched = true;                var itemStr = $.trim(line);                var itemArr = itemStr.split(' ');                var logDate = itemArr[0];                var logTime = itemArr[1];                var time = logDate+' '+logTime;                switch(type){                //进度查找过滤                    case '0':                    case null:
                        matched = true;                        break;                    case '1':                        var timeSplit = logTime.slice(0,2);                        if(timeSplit == hour){
                            matched = true;                            break;
                        }
                        matched = false;                        break;                    case '2':                        var timeSplit = logTime.slice(0,5);                        if(timeSplit == minute){
                            matched = true;                            break;
                        }
                        matched = false;                        break;                    case '3':                        var timeSplit = logTime.slice(0,8);                        if(timeSplit == second){
                            matched = true;                            break;
                        }
                        matched = false;                        break;                    default:                        console.log('unkonw type!');                        break;
                }                if(matched === true &&(lineCount>logReadFlag)){                //日志结果格式化输出呈现
                    countResult ++;                    var result = itemArr[2];                    if(result == 'err'){                        var operation = itemArr[4];
                        result = '失败：'+itemArr[5]+' '+(itemArr[6]?itemArr[6]:'');
                    }else{                        var operation = itemArr[4]+' '+itemArr[5]+(itemArr[6]?itemArr[6]:'');
                        result = '成功';
                    }
                    logStr += '<tr><td>'+time+'</td><td>'+operation+'</td><td>'+result+'</td></tr>'
                }

                logStr += '<tr><td>'+time+'</td><td>'+content+'</td></tr>'
            });            objReadline.on('close', ()=>{                if(logReadFlag == 0 && (logStr == '')){                    var info = '无日志信息可供查看';
                }                if(logReadFlag >0 && (logStr != '')){                    var newLogNum = lineCount - logReadFlag;                    var info = '刷新成功,更新'+newLogNum+'条日志!';
                    $('#logInfoTable').prepend(logStr);
                }else if(logReadFlag >0 && (logStr == '')){                    var info = '刷新成功,无日志更新!';
                }else{
                    $('#logInfoTable').html(logStr);
                }                if(op == 'search'){                    var info = '查找到'+countResult+'条日志';
                }
                $('#logTipInfo tr td').html(info);                if((op == 'search' || op == 'refresh') &&(logReadFlag != 0 || newLogNum >0 || countResult >0)){
                    setTimeout(function() {$('#logTipInfo').fadeOut(567);}, 2000);                    //操作结束后给出信息反馈，反馈自动淡出消失
                }                else{
                    $('#logTipInfo').hide();
                }
                logReadFlag = lineCount;                console.log('closed');
            });
        }
    });
}