[Seaside] Fwd: Rest - Ajax request - build file

Sebastien Audier sebastien.audier at gmail.com
Fri Mar 13 01:21:37 UTC 2015

Hi all,

I work on pharo 2.0 and seaside-REST with ZincServer.

I need to rebuild a file which is uploaded by POST requests through
Seaside-REST but I don't really use WASession.

On javascript layer, I cut the file with this function:

function(e) {  var name = this.files.name;
  var blob = this.files[0];

  const BYTES_PER_CHUNK = 1024 * 1024; // 1MB chunk sizes.
  const SIZE = blob.size;

  var start = 0;
  var end = BYTES_PER_CHUNK;

  while(start < SIZE) {
    upload(name, blob.slice(start, end));

    start = end;
    end = start + BYTES_PER_CHUNK;
  }}, false);

And I send datas with this function:

function upload(aFileName, files) {
  var formData = new *FormData*();

  for (var i = 0, file; file = files[i]; ++i) {
    *formData.append(aFileName, file);*

  var xhr = new XMLHttpRequest();
  xhr.open('POST', '/myPath', true);
  xhr.onload = function(e) { ... };

  xhr.send(*formData*);  // multipart/form-data}

I have a POST method on my handler, but I receive multiple requests.
On this way, I don't have access to the requestContext in order to get the
WAFile in request.
If I don't cut the file, it works and I can store on disk. But not in the
other case.

Of course, my goal is to store the file on disk correctly.

How to get file content of each request ?
How  to rebuild and store the file correctly if the requests aren't ordored

Any help ?

Thank's a lot.

Sébastien AUDIER

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