如何使用 Node.js 库 Winston 向日志添加时间戳？
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How can I add timestamp to logs using Node.js library Winston?
提问by kolrie
I want to add timestamp to logs. What is the best way to achieve this?
我想在日志中添加时间戳。实现这一目标的最佳方法是什么？
回答by imagreenplant
I was dealing with the same issue myself. There are two ways I was able to do this.
我自己也在处理同样的问题。我有两种方法可以做到这一点。
When you include Winston, it usually defaults to adding a Console transport. In order to get timestamps to work in this default case, I needed to either:
当您包含 Winston 时，它通常默认添加控制台传输。为了让时间戳在这种默认情况下工作，我需要：
- Remove the console transport and add again with the timestamp option.
- Create your own Logger object with the timestamp option set to true.
- 删除控制台传输并使用时间戳选项再次添加。
- 创建您自己的 Logger 对象，并将时间戳选项设置为 true。
The first:
首先：
var winston = require('winston');
winston.remove(winston.transports.Console);
winston.add(winston.transports.Console, {'timestamp':true});
The second, and cleaner option:
第二个，更干净的选择：
var winston = require('winston');
var logger = new (winston.Logger)({
transports: [
new (winston.transports.Console)({'timestamp':true})
]
});
Some of the other options for Console transport can be found here:
可以在此处找到控制台传输的其他一些选项：
- level: Level of messages that this transport should log (default 'debug').
- silent: Boolean flag indicating whether to suppress output (default false).
- colorize: Boolean flag indicating if we should colorize output (default false).
- timestamp: Boolean flag indicating if we should prepend output with timestamps (default false). If function is specified, its return value will be used instead of timestamps.
- 级别：此传输应记录的消息级别（默认为“调试”）。
- 静默：布尔标志，指示是否抑制输出（默认为 false）。
- colorize：布尔标志，指示我们是否应该对输出进行着色（默认为 false）。
- 时间戳：布尔标志，指示我们是否应该在输出前加上时间戳（默认为 false）。如果指定了函数，则将使用其返回值而不是时间戳。
回答by Siva Kiran
Above answers did not work for me. In case you are trying to add timestamp to your logs using the latest version of Winston - 3.0.0-rc1, this worked like charm:
以上答案对我不起作用。如果您尝试使用最新版本的 Winston - 3.0.0-rc1 向日志添加时间戳，这就像魅力一样：
const {transports, createLogger, format} = require('winston');
const logger = createLogger({
format: format.combine(
format.timestamp(),
format.json()
),
transports: [
new transports.Console(),
new transports.File({filename: 'logs/error/error.log', level: 'error'}),
new transports.File({filename: 'logs/activity/activity.log', level:'info'})
]
});
I used 'format.combine()'. Since I needed timestamp on all my transports, I added the formatting option within the createLogger, rather than inside each transport. My output on console and on file (activity.log) are as follows:
我使用了'format.combine()'。因为我需要所有传输的时间戳，所以我在 createLogger 中添加了格式化选项，而不是在每个传输中。我在控制台和文件（activity.log）上的输出如下：
{"message":"Connected to mongodb","level":"info","timestamp":"2018-02-01T22:35:27.758Z"}
{"message":"Connected to mongodb","level":"info","timestamp":"2018-02-01T22:35:27.758Z"}
We can add formatting to this timestamp in 'format.combine()' as usual using:
我们可以像往常一样在 'format.combine()' 中为这个时间戳添加格式：
format.timestamp({format:'MM-YY-DD'})
回答by Biswadev
We can do like this also
我们也可以这样做
var winston = require('winston');
const { createLogger, format, transports } = require('winston')
var config = require('../configurations/envconfig.js');
var loggerLevel = process.env.LOGGERLEVEL || config.get('LOGGERLEVEL');
var logger = winston.createLogger({ format: format.combine(
format.timestamp({
format: 'YYYY-MM-DD HH:mm:ss'
}),
format.printf(info => `${info.timestamp} ${info.level}: ${info.message}`+(info.splat!==undefined?`${info.splat}`:" "))
),
transports: [
new (winston.transports.Console)({ level: loggerLevel }),
]
});
module.exports = logger;
回答by KTU
You can use built-in utiland foreverto achieve logging with timestap for your nodejs server. When you start a server add log output as part of the parameter:
您可以使用内置的util和永远为您的 nodejs 服务器实现带时间戳的日志记录。当您启动服务器时，将日志输出添加为参数的一部分：
forever start -ao log/out.log server.js
And then you can write util in your server.js
然后你可以在你的 server.js 中编写 util
server.js
服务器.js
var util = require('util');
util.log("something with timestamp");
The output will look something like this to out.log file:
out.log 文件的输出将如下所示：
out.log
输出日志
15 Mar 15:09:28 - something with timestamp
回答by Tamil
Although I'm not aware of winston, this is a suggestion. I use log4jsfor logging & my logs by default look like this
虽然我不知道温斯顿，但这是一个建议。我使用log4js进行日志记录，默认情况下我的日志看起来像这样
[2012-04-23 16:36:02.965] [INFO] Development - Node Application is running on port 8090
[2012-04-23 16:36:02.966] [FATAL] Development - Connection Terminated to '127.0.0.1' '6379'
Development is the environment of my node process & [INFO|FATAL] is log level
开发是我节点进程的环境&[INFO|FATAL]是日志级别
Maintaining different profiles for logging is possible in log4js. I have Development & Production profiles. Also there are logger types like rolling file appender, console appender, etc. As a addon your log files will be colorful based on the log level [Trace, Info, Debug, Error, Fatal] ;)
在 log4js 中可以维护不同的日志记录配置文件。我有开发和生产配置文件。还有记录器类型，如滚动文件附加程序、控制台附加程序等。作为插件，您的日志文件将根据日志级别 [Trace、Info、Debug、Error、Fatal] 变得丰富多彩；)
log4js will override your console.logIt is a configurable parameter now in 0.5+
log4js 将覆盖您的 console.log它现在是 0.5+ 中的可配置参数
回答by khoi nguyen
we could use console-stamp to add timestamp and log level to the existing console: require('console-stamp')(console, '[yyyy-mm-dd HH:MM:ss.l]')
我们可以使用 console-stamp 将时间戳和日志级别添加到现有控制台： require('console-stamp')(console, '[yyyy-mm-dd HH:MM:ss.l]')
See https://github.com/starak/node-console-stampfor the details
回答by walv
Sometimes default timestamp format can be not convenient for you. You can override it with your implementation.
有时默认时间戳格式对您来说可能不方便。您可以使用您的实现覆盖它。
Instead of
代替
var winston = require('winston');
var logger = new (winston.Logger)({
transports: [
new (winston.transports.Console)({'timestamp':true})
]
});
you can write
你可以写
var winston = require('winston');
var logger = new (winston.Logger)({
transports: [
new (winston.transports.Console)({
'timestamp': function() {
return <write your custom formatted date here>;
}
})
]
});
See https://github.com/winstonjs/winston#custom-log-formatfor the details
有关详细信息，请参阅https://github.com/winstonjs/winston#custom-log-format
回答by Renan Coelho
Another solution is wrapping the logger into a file that exports some functions like logger.info(), logger.error(), etc. then you just pass an extra key to be sent on every message log.
另一种解决方案是将记录器包装到一个文件中，该文件导出一些函数，如 logger.info()、logger.error() 等，然后您只需传递一个额外的密钥即可在每个消息日志上发送。
loggerService.js
记录器服务.js
const logger = winston.createLogger({ ... })
function handleLog(message, level) {
const logData = {
timestamp: Date.now(),
message,
}
return logger[level](logData)
}
function info(message) {
handleLog(message, 'info')
}
function error(message) {
handleLog(message, 'error')
}
function warn(message) {
handleLog(message, 'warn')
}
module.exports = {
info,
error,
warn
}
whatever-file.js
任何文件.js
const logger = require('./services/loggerService')
logger.info('Hello World!')
your-log.log
你的日志
{"timestamp":"2019-08-21 06:42:27","message":"Hello World!","level":"info"}
