微信小程序集成前端日志库的详细记录

// utils/logger.js
import {
  getEnvironment
} from './env'
class Logger {
  constructor(config) {
    this.level = config.level || 'info';
    this.sendToServer = config.sendToServer || false;
    this.serverUrl = config.serverUrl || '';
    this.printInDev = config.printInDev || false;
  }

  log(level = this.level, message) {
    const env = getEnvironment()
    if (this.shouldLog(level)) {
      if (typeof message === 'undefined') {
        message = level;
        level = this.level;
      }
      //通过配置参数控制是否打印
      if (this.printInDev || env == 'prod' || env == 'test') {
        console.log(`[${level.toUpperCase()}]: ${message}`);
      }
      if (this.sendToServer) {
        if (env == 'prod' || env == 'test') {
          this.sendLogToServer(level, message);
        }
      }
    }
  }

  info(message) {
    this.log('info', message);
  }

  warn(message) {
    this.log('warn', message);
  }

  error(message) {
    this.log('error', message);
  }

  shouldLog(level) {
    const levels = ['info', 'warn', 'error'];
    const currentLevelIndex = levels.indexOf(this.level);
    const messageLevelIndex = levels.indexOf(level);
    return messageLevelIndex >= currentLevelIndex;
  }

  sendLogToServer(level, message) {
    wx.request({
      url: this.serverUrl,
      method: 'POST',
      data: {
        level,
        message,
      },
      success(res) {
        console.log('Log sent to server:', res);
      },
      fail(err) {
        console.error('Failed to send log to server:', err);
      },
    });
  }
}

module.exports = Logger;

const Logger = require('./utils/logger.js');

//实例话 Logger
    const logger = new Logger({
      level: env, // 可配置为 'info', 'warning', 'error'
      sendToServer: true, // 是否发送到服务端
      printInDev: false, //开发环境是否打印日志
      serverUrl: 'https://your-server-url.com/logs', // 服务端 URL
    });
    wx.logger = logger; //挂载到wx

 onError(error) {
    wx.logger.log(error);
  },

// utils/overridePage.js

function overridePage() {
  const logger = wx.logger;
  const originalPage = Page;
  Page = function (pageConfig) {
    const originalOnLoad = pageConfig.onLoad;
    pageConfig.onLoad = function (options) {
      logger.log(`Page loaded: ${this.route}`);
      if (originalOnLoad) originalOnLoad.call(this, options);
    };

    const originalOnShow = pageConfig.onShow;
    pageConfig.onShow = function () {
      logger.log(`Page shown: ${this.route}`);
      if (originalOnShow) originalOnShow.call(this);
    };

    const originalOnHide = pageConfig.onHide;
    pageConfig.onHide = function () {
      logger.log(`Page hidden: ${this.route}`);
      if (originalOnHide) originalOnHide.call(this);
    };

    const originalOnUnload = pageConfig.onUnload;
    pageConfig.onUnload = function () {
      logger.log(`Page unloaded: ${this.route}`);
      if (originalOnUnload) originalOnUnload.call(this);
    };


    originalPage(pageConfig);
  };
}

module.exports = overridePage;

const overridePage = require('./utils/overridePage.js');

 wx.logger = logger; //挂载到wx
 overridePage(); //重写page 

npm install loglevel

app.js
import log from 'loglevel';
onlaunch(){
log.setLevel('info'); //设置 loglevel 日志输出级别 
log.trace('This is a trace message');
log.debug('This is a debug message');
log.info('This is an info message');
log.warn('This is a warning message');
log.error('This is an error message');
}

https://github.com/artemyarulin/loglevel-serverSend/blob/master/loglevel-serverSend.js

// utils/loglevel-server-send-wx.js
var loglevelServerSend = function (options) {
  var _url = options && options.url || 'http://localhost:8000/main/log',
    _callOriginal = options && options.callOriginal || false,
    _prefix = options && options.prefix,
    _sendQueue = [],
    _isSending = false;

  var _sendNextMessage = function () {
    if (!_sendQueue.length || _isSending) return;

    _isSending = true;

    var msg = _sendQueue.shift();
    wx.request({
      url: _url,
      method: 'POST',
      data: msg,
      header: {
        'Content-Type': 'text/plain'
      },
      success: function () {
        _isSending = false;
        setTimeout(_sendNextMessage, 0);
      },
      fail: function () {
        _isSending = false;
        setTimeout(_sendNextMessage, 0);
      }
    });
  };

  wx.log = {
    log: function (level, message) {
      if (typeof _prefix === 'string') message = _prefix + message;
      else if (typeof _prefix === 'function') message = _prefix(level, message);
      else message = level + ': ' + message;

      console.log(`[${level.toUpperCase()}]: ${message}`);
      if (options && options.sendToServer) {
        _sendQueue.push(message);
        _sendNextMessage();
      }
    },
    info: function (message) {
      this.log('info', message);
    },
    warn: function (message) {
      this.log('warn', message);
    },
    error: function (message) {
      this.log('error', message);
    }
  };
};

module.exports = loglevelServerSend;

const loglevelServerSend = require('./utils/loglevel-server-send-wx.js');
onLaunch(){
log.setLevel('info'); //设置 日志输出级别 
wx.log = log; //挂载到wx

//wx.log*等触发日志上传服务端
    loglevelServerSend({
      url: 'https://your-server-url.com/logs',
      prefix: function (level, message) {
        return `[${new Date().toISOString()}] [${level.toUpperCase()}]: ${message}`;
      },
      sendToServer: env === 'dev' || env === 'test' || env === 'pre' || env === 'prod', //设置允许上传日志的环境
      callOriginal: false // 上传日志时是否控制台打印
    });
    wx.log.level = 'info'; //动态改变日志输出的级别
}

//捕获异常
onError(error) {
    wx.log.log('error', error);
  },

// utils/environment.js
function getEnvironment() {
  return __wxConfig.envVersion;
}

function getLogLevel(env) {
  const levels = {
    'develop': 'info',
    'trial': 'warning',
    'pre': 'error',
    'release': 'error'
  };
  return levels[env] || 'info';
}

module.exports = { getEnvironment, getLogLevel };