Node.js Upload Files

1.上傳文件需要用到Formidable Module，該Module通過npm install formidable來下載

2.安裝完成候引入：var formidable = require('formidable');

3.new一個(gè)IncomingForm對象： var form = new formidable.IncomingForm();

4.解析上傳的文件：

    form.parse(req, function (err, fields, files) {
        res.write('File uploaded and moved!');
        res.end();

5.通過fs Module來重命名上傳的文件：

    form.parse(req, function (err, fields, files) {
      var oldpath = files.filetoupload.path;
      var newpath = '/tmp/upload/' + files.filetoupload.name;
      fs.rename(oldpath, newpath, function (err) {
        if (err) throw err;
        res.write('File uploaded and moved!');
        res.end();
      });

最后所有的完整代碼如下：

var http = require('http');
var formidable = require('formidable');
var fs = require('fs');

http.createServer(function (req, res) {
  if (req.url == '/fileupload') {
    var form = new formidable.IncomingForm();
    form.parse(req, function (err, fields, files) {
      var oldpath = files.filetoupload.path;
      var newpath = '/tmp/upload/' + files.filetoupload.name;
      fs.rename(oldpath, newpath, function (err) {
        if (err) throw err;
        res.write('File uploaded and moved!');
        res.end();
      });
 });
  } else {
    res.writeHead(200, {'Content-Type': 'text/html'});
    res.write('<form action="fileupload" method="post" enctype="multipart/form-data">');
    res.write('<input type="file" name="filetoupload"><br>');
    res.write('<input type="submit">');
    res.write('</form>');
    return res.end();
  }
}).listen(8080);