Node.js异常处理

Node.js异常处理

var log4js = require('log4js');log4js.configure({    appenders: [        { type: 'console' },        { type: 'file', filename: 'd:/logs/my-app.log', category: 'my-app' }    ]});var log = log4js.getLogger('my-app');log.setLevel('INFO');

/// catch 404 and forwarding to error handlerapp.use(function(req, res, next) {    log.error("==========404===============");    var err = new Error('Not Found');    err.status = 404;    next(err);});/// error handlers// development error handler// will print stacktraceif (app.get('env') === 'development') {    app.use(function(err, req, res, next) {        log.error("开发环境==========="+err);        res.status(err.status || 500);        res.render('error', {            message: err.message,            error: err        });    });}// production error handler// no stacktraces leaked to userapp.use(function(err, req, res, next) {    log.error("生产环境==========="+err);    res.status(err.status || 500);    res.render('error', {        message: err.message,        error: {}    });});/*process.on('uncaughtException', function(err) {    log.error("uncaughtException==========="+err);});*/