sw_md5.js

/* Adapted for Swift by Chmouel Boudjnah <[email protected]>
   Original: http://www.ioncannon.net/programming/1539/direct-browser-uploading-amazon-s3-cors-fileapi-xhr2-and-signed-puts/

   */

function sw_md5(blob, fn){
        _reader.onloadend = function(evt) {
            if (evt.target.readyState == FileReader.DONE) { // DONE == 2
                var md5sum = md5(evt.target.result);
                fn(md5sum);
            }
        };
        _reader.onerror = function(evt) {
            alert("Error: " + evt.target.error.code);
        };
        _reader.readAsBinaryString(blob);
    };
function createCORSRequest(method, url)
{
  var xhr = new XMLHttpRequest();
  if ("withCredentials" in xhr)
  {
    xhr.open(method, url, true);
  }
  else if (typeof XDomainRequest != "undefined")
  {
    xhr = new XDomainRequest();
    xhr.open(method, url);
  }
  else {
    xhr = null;
  }
  return xhr;
}

function handleFileSelect(evt)
{
  setProgress(0, 'Upload started.');

  var files = evt.target.files;

  var output = [];
  for (var i = 0, f; f = files[i]; i++)
  {
    sw_md5(f, function(md5sum){
      alert("md5: "+md5sum)
      uploadFile(f);
    });
  }
}

function uploadFile(file)
{
  authUrl=document.getElementById('authurl').value;
  container=document.getElementById('container').value;
  token=document.getElementById('authtoken').value;

  signedURL=authUrl + "/" + container + "/" + file.name;
  uploadToSW(file, signedURL, token);
}

/**
 * Use a CORS call to upload the given file to Swift. Assumes the url
 * parameter has been signed and is accessable for upload.
 */
function uploadToSW(file, url, token)
{
  var xhr = createCORSRequest('PUT', url);
  if (!xhr)
  {
    setProgress(0, 'CORS not supported');
  }
  else
  {
    xhr.onload = function()
    {
      if(xhr.status == 200 || xhr.status == 201)
      {
        setProgress(100, 'Upload completed.');
      }
      else
      {
        setProgress(0, 'Upload error: ' + xhr.status);
      }
    };

    xhr.onerror = function()
    {
      setProgress(0, 'XHR error.');
    };

    xhr.upload.onprogress = function(e)
    {
      if (e.lengthComputable)
      {
        var percentLoaded = Math.round((e.loaded / e.total) * 100);
        setProgress(percentLoaded, percentLoaded == 100 ? 'Finalizing.' : 'Uploading.');
      }
    };
    // var formData = new FormData();
    // formData.append("redirect","http://192.168.99.103")
    // formData.append("max_file_size", "5373952000")
    // formData.append("expires", "1409551225")
    // formData.append("max_file_count","200")
    // formData.append("signature","b9bbd3a42334a3a3591c486d42f1040649dee026")
    // formData.append("file1",file)

    xhr.setRequestHeader('X-Auth-Token', token);
    // xhr.setRequestHeader('X-Container-Meta-Access-Control-Allow-Origin','*')
    // xhr.setRequestHeader('Content-Type', file.type);
    xhr.send(file);
  }
}

function setProgress(percent, statusLabel)
{
  var progress = document.querySelector('.percent');
  progress.style.width = percent + '%';
  progress.textContent = percent + '%';
  document.getElementById('progress_bar').className = 'loading';

  document.getElementById('status').innerText = statusLabel;
}