为什么我的快递4中间件没有被调用?

时间:2014-12-12 15:17:51

标签: node.js express

我有以下Express 4代码:

'use strict';

var express = require('express');
var app = express();
var bodyParser = require('body-parser');
var mongoose = require('mongoose');
var log = require('npmlog');
var httpStatus = require('http-status-codes');

var config = require('./config');

var routes = require('./routes');

app.use(function (err, req, res, next) {
    log.verbose('Express', '%s %s', req.method, req.url); //Never called
    next();
});

app.use(function (err, req, res, next) {
    if(err) {
        res.status(httpStatus.INTERNAL_SERVER_ERROR).send(err.message); //Never called
    }
});

app.use(bodyParser.json());
app.use('/api', routes);

mongoose.connect(config.mongoAddress,
    {keepAlive: 1, server: {auto_reconnect: true}},
    function (err) {
        if (err) {
            log.error('Mongo', 'Could not connect to mongo database');
            throw err;
        } else {
            log.info('Mongo', 'Successfully established connection to ' + config.mongoAddress);
        }
    }
);

var server = app.listen(config.port, function () {
    log.info('Server', 'Server listening at %s', server.address().port);
});

我的路线工作正常,但我在app.use(bodyParser.json());之前的所有功能都没有被调用(我也试过添加断点,但无济于事)。我也尝试在添加路线后添加这些功能,这没有帮助(但这是预期的)。

我忘了什么?

1 个答案:

答案 0 :(得分:2)

这是怎么回事:

在定义中间件之前,您已经包含了路由。你应该做的是这样的事情:

var app = express();

// setup all middlewares here
app.use(...);
app.use(...);

// include all routes here
app.use(routera);
app.use(routerb);