在 Express 中使用 log4js

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在 Express 中使用 log4js

在 config 中导出 log 配置

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import log4js from "log4js";

log4js.configure({
  appenders: {
    file: {
      type: "file",
      filename: "log/main.log",
      maxLogSize: 200480,
      backups: 10
    },
    console: {
      type: "stdout"
    }
  },
  categories: {
    development: {
      appenders: ["file", "console"],
      level: "all"
    },
    production: {
      appenders: ["file"],
      level: "info"
    },
    default: {
      appenders: ["file"],
      level: "info"
    }
  }
});

const logger =
  process.env.NODE_ENV === "development"
    ? log4js.getLogger("development")
    : log4js.getLogger("production");

export default logger;

express 中间件导入

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import log4js from "log4js";
import logger from "../config/log";

export const loggerMiddleware = app => {
  app.use(log4js.connectLogger(logger));
};

log4js 作为普通模块使用

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import logger from "./server/config/log";
logger.info("24234234234");