node express脚手架处理404等异常信息

小鱼儿 2021-07-24 15:24 603阅读 0赞

1、引入
    	var createError = require('http-errors');
    
    2、错误处理(可自定义);
    	// 当于所有路径都不匹配时,报404,自定义
    	app.use(function(req, res, next) {
    	  next(createError(404));
    	});
    
    	// error handler
    	app.use(function(err, req, res, next) {
    	  // set locals, only providing error in development
    	  res.locals.message = err.message;
    	  res.locals.error = req.app.get('env') === 'development' ? err : {};
    	
    	  // render the error page
    	  res.status(err.status || 500);
    	  res.render('error');
    	});

//路由错误处理
    var createError = require('http-errors');
    var express = require('express');
    var path = require('path');
    var cookieParser = require('cookie-parser');
    //错误输出日志
    var logger = require('morgan');
    
    var indexRouter = require('./routes/index');
    var usersRouter = require('./routes/users');
    
    var app = express();
    
    // view engine setup
    app.set('views', path.join(__dirname, 'views'));
    app.set('view engine', 'ejs');
    
    //开发环境设置
    app.use(logger('dev'));
    //解析json
    app.use(express.json());
    //post参数设置
    app.use(express.urlencoded({  extended: false }));
    app.use(cookieParser());
    //静态资源设置
    app.use(express.static(path.join(__dirname, 'public')));
    
    app.use('/', indexRouter);
    app.use('/users', usersRouter);
    
    // catch 404 and forward to error handler
    // 当于所有路径都不匹配时,报404,自定义
    app.use(function(req, res, next) { 
      next(createError(404));
    });
    
    // error handler
    app.use(function(err, req, res, next) { 
      // set locals, only providing error in development
      res.locals.message = err.message;
      res.locals.error = req.app.get('env') === 'development' ? err : { };
    
      // render the error page
      res.status(err.status || 500);
      res.render('error');
    });
    
    module.exports = app;