Question

您是否有关于如何对节点js winston日志记录方法（如信息）进行猴子修补的想法，请使用shimmer（https://www.npmjs.com/package/shimmer）进行调试？

例如，这是我的winston 3.x设置：

let winston = require('winston')
   winstonInit = winston.createLogger({
      format: winston.format.json(),
      transports: [
        new winston.transports.Console({ level: 'info' }),
        new winston.transports.File({
          name: 'winston-logging',
          level: 'info',
          filename: './log/winston.log',
          handleExceptions: true
        })
      ],
      exceptionHandlers: [
        new winston.transports.File({ filename: './log/exceptions.log', handleExceptions: true})
      ]
    });
    winston.add(winstonInit);

因此，在我的应用中，我可以称其为 winston.info('send this message to Slack') // output: send this message to Slack。除了显示消息外，我们还执行其他功能。

我只是想修补一下winston.info（），例如添加一些其他功能，例如在执行winston.info时发送Slack消息通知。谢谢。

Answer 1

有两种方法可以实现此目的：

A。 shimmer方式：

var shimmer = require('shimmer');

// Assuming that an instance of winston is accesible.
shimmer.wrap(winston, 'info-interceptor', (winstonCall) => {
    return function(arguments) {
        // arguments are the log messages sent to the winston method for logging.
        console.log(arguments)
        
        // check if executed winston function is winston.info or not.
        if(winstonCall.name === 'info'){
           // add logic to send arguments to a slack message
        }
        
        // it is important to return the original call.
        retirm winstonCall;
    }
});

注意：不建议使用function.name方法，因此，我建议不要使用闪烁方式。

B。 non-shimmer方式

只要以以下方式执行info方法，就可以更新winston配置以执行附加功能：

let winston = require('winston')
   winstonInit = winston.createLogger({
      format: winston.format.json(),
      transports: [
        new winston.transports.Console({ level: 'info' }),
        new winston.transports.File({
          name: 'winston-logging',
          level: 'info',
          filename: './log/winston.log',
          handleExceptions: true
        }),
        new HttpStreamTransport({
            url: 'https://yourdomain.com/log'
        })
      ],
      exceptionHandlers: [
        new winston.transports.File({ filename: './log/exceptions.log', handleExceptions: true})
      ]
    });
    
    // winston.add(winstonInit);

    const logger = {
       _sendMessageToSlack: (msg) => {
           // logic for sending message to slack
        
           return message;
       },
       info: (msg) => winstonInit.info(logger._sendMessageToSlack(msg)),
       warn: (msg) => winstonInit.warn(msg),
       error: (msg) => winstonInit.error(msg),
   };

module.exports = logger;

这将允许您将logger实例导入各种文件并将其用作logger.info()，logger.warn()，logger.error()，并在{{1} }。

Monkey修补节点JS Winston日志记录

1 个答案: