用nodejs处理文件上传(1)

1 安装外部模块node-formidable
本模块的具体细节请参考https://github.com/felixge/node-formidable，它很好的抽象了解析上传文件的细节,使我们可以像处理post数据一样来处理上传的文件。
我们用nmp来安装formidable模块
C:\Users\xxx>npm install formidable
[email protected] node_modules\formidable
安装成功
2 改写server模块

var formidable = require('formidable'),http = require("http"),sys = require('sys');

function start(route, handle) {
	function onRequest(request, response) {
		if(request.url == '/upload' && request.method.toLowerCase() == 'post'){
			var form = new formidable.IncomingForm();
			form.parse(request,function(error,fields,files){
				response.writeHead(200, {'content-type':'text/plain'});
				response.write('receive upload:\n\n');
				response.end(sys.inspect({fields: fields,files:files}));
			});
			return;
		}
		response.writeHead(200,{'content-type':'text/html'});
		response.end(
		'<form action="/upload" enctype="multipart/form-data" '+
		'method="post">'+
		'<input type="text" name="title"><br>'+
		'<input type="file" name="upload" multiple="multiple"><br>'+
		'<input type="submit" value="Upload">'+
		'</form>'
		);
	}
	http.createServer(onRequest).listen(8888);
	console.log("Server has started.");
}
exports.start = start;

3 上传文件后跳转到/upload页面显示结果
上传js文件

receive upload:
{ fields: { title: '2014 world cup' },
  files: 
   { upload: 
      { domain: null,
        _events: {},
        _maxListeners: 10,
        size: 301,
        path: 'C:\\Users\\xxx\\AppData\\Local\\Temp\\53608004f2340d6b0697e387eeaf3a91',
        name: 'index.js',
        type: 'application/javascript',
        hash: null,
        lastModifiedDate: Wed Jun 25 2014 16:37:31 GMT+0800 (China Standard Time),
        _writeStream: [Object] } } }

上传png图片

receive upload:

{ fields: { title: '2014 world cup' },
  files: 
   { upload: 
      { domain: null,
        _events: {},
        _maxListeners: 10,
        size: 429423,
        path: 'C:\\Users\\xxx\\AppData\\Local\\Temp\\2a4c267e11f0c3c3bae6c7e552e3f79f',
        name: 'chart1.png',
        type: 'image/png',
        hash: null,
        lastModifiedDate: Wed Jun 25 2014 16:49:18 GMT+0800 (China Standard Time),
        _writeStream: [Object] } } }