【发布时间】：2016-05-17 05:18:27
【问题描述】：
我正在关注此previously asked question，但收到此错误：
usera@usera-VirtualBox:~/Desktop/test/sample$ nodejs smallNode.js
/home/usera/Desktop/test/sample/smallNode.js:3
var app = express();
^
TypeError: object is not a function
at Object.<anonymous> (/home/usera/Desktop/test/sample/smallNode.js:3:11)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
at startup (node.js:119:16)
at node.js:902:3
我错过了什么？
服务器端代码：
var express = require('express');
var bodyParser = require('body-parser');
var app = express();
//Note that in version 4 of express, express.bodyParser() was
//deprecated in favor of a separate 'body-parser' module.
app.use(bodyParser.urlencoded({ extended: true }));
//app.use(express.bodyParser());
app.post('/myaction', function(req, res) {
res.send('You sent the name "' + req.body.name + '".');
});
app.listen(8080, function() {
console.log('Server running at http://127.0.0.1:8080/');
});
这是运行 npm install 的结果。在安装过程中似乎有一个警告，所以也许这就是问题所在......
usera@usera-VirtualBox:~/Desktop/test/sample$ npm install express
npm http GET https://registry.npmjs.org/express/2.5.8
npm http 304 https://registry.npmjs.org/express/2.5.8
npm WARN engine express@2.5.8: wanted: {"node":">= 0.4.1 < 0.7.0"} (current: {"node":"v0.10.25","npm":"1.3.10"})
npm http GET https://registry.npmjs.org/connect
npm http GET https://registry.npmjs.org/mime/1.2.4
npm http GET https://registry.npmjs.org/qs
npm http GET https://registry.npmjs.org/mkdirp/0.3.0
npm http 304 https://registry.npmjs.org/connect
npm http 304 https://registry.npmjs.org/qs
npm http 304 https://registry.npmjs.org/mime/1.2.4
npm http 304 https://registry.npmjs.org/mkdirp/0.3.0
npm http GET https://registry.npmjs.org/formidable
npm http 304 https://registry.npmjs.org/formidable
express@2.5.8 node_modules/express
├── qs@0.4.2
├── mime@1.2.4
├── mkdirp@0.3.0
└── connect@1.9.2 (formidable@1.0.17)
【问题讨论】：
-
在我测试时工作正常。
-
你
npm install express了吗？ -
是的，已编辑原始帖子以包含来自
npm install express的结果 -
那是 express 的旧版本...你至少应该使用 v3，或者更好的 v4 来让它导出一个函数。
-
我猜你的
package.json版本不对。