1066675 - SystemXHR and DeviceStorage

Status: RESOLVED DUPLICATE of bug 855952

(Firefox OS Graveyard :: General, defect)

Description

[bonuspunkt+bugzilla]

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:32.0) Gecko/20100101 Firefox/32.0
Build ID: 20140830210550

Steps to reproduce:

im trying to download a podcast (140MB) to the device via wifi and store it in the music library

```
var musicStore = navigator.getDeviceStorage('music');

var xhr = new XMLHttpRequest({ mozSystem: true });
xhr.open('GET', 'http://localhost:8888/fs139-rectal-temperature-sensor-location.mp3');
xhr.send();
xhr.addEventListener('load', function() {
  var blob = new Blob([xhr.responseText], { type: 'audio/mp3'});

  console.log('loading done');

  var add = musicStore.add(blob);
  add.onsuccess = function() {
    console.log('add success');
  }
  add.onerror = function() {
    console.log('add error');
    console.log(arguments);
  }
});
```


Actual results:

in the simulator i get an error


Expected results:

i don't know if the api is good for that use case.
transforming the xhr.responseText to an Blob seems kinda big overhead.
maybe we there should be a download task for files that huge
or the xhr could stream into the music storage

Comment 1

[[:fabrice] Fabrice Desré]

You should set xhr.responseType = "blob" and then just get your blob from xhr.response. It still may be large though, so you may want to also look at chunking.

Comment 2

[bonuspunkt+bugzilla]

did i miss something or is it currently impossible to write chunked to DeviceStorage

Comment 3

[bonuspunkt+bugzilla]

oh, it's possible with
https://developer.mozilla.org/en-US/docs/Web/API/DeviceStorage.getEditable
and
https://developer.mozilla.org/en-US/docs/Web/API/FileHandle.open