multipleFileUploadWithExpressJS

Description: how to upload multiple files and save them with express.js version 4.x ( node.JS library )

___ important key factors ___

1. preparing the html to handle file upload properly.

  <form action="/uploadFiles" method="post" enctype="multipart/form-data">
    <input type="file" multiple="multiple" accept="image/*" name="uploadedImages"/><br/>
    <input type="submit" value="Upload" />
  </form>

multiple attribute allow multiple files to be selected from the file browser. Supported in IE10, Firefox, Opera, Chrome, and Safari.
accept attribute tells the browser what type of files to allow to select by default.
name attribute with a given value is required for nodeJS to be able to get referenced. enctype="multipart/form-data" The enctype attribute specifies how the form-data should be encoded when submitting it to the server. The enctype attribute can be used only if method="post"

2. getting ready for reading the uploaded files####

    app.use(express.bodyParser()); // required for accessing req.files object

3. handling the uploaded files #1####

    req.files.uploadedImages.forEach(function (element, index, array) {
      fs.readFile(element.path, function (err, data) {
        var newPath = __dirname + "/public/uploadsDirectoryname/" + element.name;
        fs.writeFile(newPath, data, function (err) {
          if(err) {
            console.log(err);
          }
        });
      });

######## TODO

• upload files with ajax automatically when they are selected.
• when multiple files are selected, show them immediately, add progress indicator as well.
• add support for older shitty browsers, that doesn't support html5 multiple file upload
• consider uploadify.com/demos/ as a possible fallback.