Question

我尝试使用Winston为我的快速服务器设置访问日志和错误日志，但我似乎做错了。

以下是我对配置文件的尝试：

const winston = require('winston'),
    fs = require('fs');

const tsFormat = () => (new Date()).toLocaleTimeString();
winston.loggers.add('errorLog', {
        file: {
                filename: '<path>/errors.log', //<path> is replaced by the 
                timestamp: tsFormat,           //absolute path of the log
                level: 'info'
        }

});
winston.loggers.add('accessLog', {
        file: {
                filename: '<path>/access.log', //same as before
                timestamp: tsFormat,
                level: 'info'
        }
});

这就是我将其包含在我的其他文件中的方式：

var winston = require('winston'),
    accessLog = winston.loggers.get('accessLog'),
    errorLog = winston.loggers.get('errorLog');

在我看来，这跟文档一样（https://github.com/winstonjs/winston/tree/2.4.0#working-with-multiple-loggers-in-winston）但是当我尝试登录它时，我收到了这个错误：

[winston] Attempt to write logs with no transports {"message":"pls","level":"info"}
[winston] Attempt to write logs with no transports {"message":"Bad request: undefined","level":"warn"}

任何帮助都会非常感激，我已经被困了好几天了。

Answer 1

我会尝试这样的事情，将所有与记录器相关的东西放入模块logger.js中：

<强> logger.js

    var winston = require('winston');
    var path = require('path');

    // Set this to whatever, by default the path of the script.
    var logPath = __dirname;

    const tsFormat = () => (new Date().toISOString());

  const errorLog = winston.createLogger({
  transports: [
    new winston.transports.File({
      filename: path.join(logPath, 'errors.log'),
      timestamp: tsFormat,
      level: 'info'})
  ]
});

const accessLog = winston.createLogger({
  transports: [
    new winston.transports.File({
      filename: path.join(logPath, 'access.log'),
      timestamp: tsFormat,
      level: 'info'})
  ]
});


    module.exports = {
        errorLog: errorLog,
        accessLog: accessLog
    };

然后在index.js中测试：

<强> index.js

var logger = require('./logger');

logger.errorLog.info('Test error log');
logger.accessLog.info('Test access log');

您应该看到如下日志行：

errors.log：

{"level":"info","message":"Test access log","timestamp":"2018-03-14T07:51:11.185Z"}

的access.log：

{"level":"info","message":"Test error log","timestamp":"2018-03-14T07:51:11.182Z"}

修改

在Winston上一版中，new (winston.Logger)已替换为winston.createLogger（https://github.com/bithavoc/express-winston/issues/175）

Answer 2

1个Logger +控制台日志用于开发目的：

logger.js

var logPath = '';
var log_level = '';

const log = winston.createLogger({
  level: log_level,
  format: winston.format.json(),
  transports: [
    new winston.transports.File({
      filename: path.join(logPath, 'access.log'),
      timestamp: tsFormat,
      level: log_level
    }),
    new winston.transports.File({
      filename: path.join(logPath, 'error.log'),
      timestamp: tsFormat,
      level: 'error'
    }),
  ]
});

if (process.env.NODE_ENV !== 'production') {
  log.add(new winston.transports.Console({
    format: winston.format.simple()
  }));
}

module.exports = {
  log: log
};

app.js

const logger = require('./logger');

logger.log.info("starting application..");

Answer 3

由于您在原始代码中将winston变量创建为const winston，因此无法在下面的行中添加传输和其他选项。提出的解决方案将类似的代码移至模块中，但将winston变量分配给var winston。

Winston：尝试写没有传输的日志

3 个答案: