filestream

W3C File Reader API streaming interfaces

filestream

A streaming implementation for working with File objects in the browser.

Because the implementations that I found really didn't cut the mustard :/

Displayed below is an example that uses simple file drag and drop. Rather than immediately displaying the file, the file is piped through a read stream into a write stream and then finally displayed in the browser.

var crel = require('crel');
var detect = require('feature/detect');
var dnd = require('drag-and-drop-files');
var img = crel('img');
var video = crel('video', { autoplay: true });
var FileReadStream = require('filestream/read');
var FileWriteStream = require('filestream/write');
 
function upload(files) {
  var queue = [].concat(files);
 
  function sendNext() {
    var writer = new FileWriteStream();
    var next = queue.shift();
 
    console.log('sending file');
    new FileReadStream(next).pipe(writer).on('file', function(file) {
      console.log('file created: ', file);
      img.src = detect('URL').createObjectURL(file);
      // video.src = detect('URL').createObjectURL(next); 
 
      if (queue.length > 0) {
        sendNext();
      }
    });
  }
 
  sendNext();
}
 
dnd(document.body, upload);
 
document.body.appendChild(crel('style', 'body, html { margin: 0; width: 100%; height: 100% }'));
document.body.appendChild(img);
document.body.appendChild(video);
 

Copyright (c) 2015 Damon Oehlman damon.oehlman@gmail.com

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