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Android DownloadManager does not work when redirecting

I am working on an application that will upload a zip file stored on Amazon S3 through the Heroku Rails server after authentication through oAuth 2. Here's the thread:

  • Request for authentication with a server running Heroku through oauth2.
  • Get the oAuth2 access token.
  • Request to download a zip file from the server (transferring the OAuth token as a medium).
  • The server resolves the request and redirects to Amazon S3 a URL containing an expiring signature (to stop downloading content without authentication).

At this point, I want DownloadManager to simply follow the redirection and receive a zip file from S3, however it does not work. Is there any way I can get around this? Or is it just a limitation of DownloadManager?

I am new to Android and still do not fully understand the best debugging methods, so I don’t have a lot of results to show you. However it seems that DownloadManager.COLUMN_STATUS == DownloadManager.STATUS_FAILED and DownloadManager.COLUMN_REASON returns "placeholder"!

EDIT is the code I'm using. Edited to hide the client, etc.

  @Override public void onListItemClick(ListView l, View v, int position, long id) { Log.i("ChapterListActivity", "Item clicked: " + id); final DownloadManager downloadManager = (DownloadManager)getSystemService(Context.DOWNLOAD_SERVICE); Uri uri = Uri.parse("http://myapphere.herokuapp.com/api/v1/volumes/2.zip"); DownloadManager.Request request = new Request(uri); String accessToken = getSharedPreferences("keyhere", MODE_PRIVATE).getString("access_token", null); Log.i("SLEChapterListActivity", "Getting file with access token... " + accessToken); request.addRequestHeader("Authorization", "Bearer " + accessToken); long reference = downloadManager.enqueue(request); IntentFilter filter = new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE); BroadcastReceiver receiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { long downloadReference = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1); Log.i("ChapterListActivity", "Download completed"); Query query = new Query(); query.setFilterById(downloadReference); Cursor cur = downloadManager.query(query); if (cur.moveToFirst()) { int columnIndex = cur.getColumnIndex(DownloadManager.COLUMN_STATUS); if (DownloadManager.STATUS_SUCCESSFUL == cur.getInt(columnIndex)) { String uriString = cur.getString(cur.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI)); File mFile = new File(Uri.parse(uriString).getPath()); } else if (DownloadManager.STATUS_FAILED == cur.getInt(columnIndex)){ String statusResult = cur.getString(cur.getColumnIndex(DownloadManager.COLUMN_REASON)); Toast.makeText(context, "FAILED " + statusResult, Toast.LENGTH_SHORT).show(); } else if (DownloadManager.ERROR_TOO_MANY_REDIRECTS == cur.getInt(columnIndex)){ String statusResult = cur.getString(cur.getColumnIndex(DownloadManager.COLUMN_REASON)); Toast.makeText(context, "TOO MANY REDIRS " + statusResult, Toast.LENGTH_SHORT).show(); } } } }; registerReceiver(receiver, filter); }
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2 answers

I found in Download Manager Sources (line 500):

3xx: redirection (not used by the download manager)

It is not yet supported.

In my current project, loading is done in two steps:

  • Get the Amazon URL from our own server through oAuth2
  • Launch DownloadManager with Amazon address.

If you don’t like this two-step process, I don’t do it, then look at the RoboSpice project, it has a similar philosophy as DownloadManager.

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Just answering part of this question. The reason you get the reason as the "placeholder" row is because the reason column is an integer, not a string. See Android DownloadManager: the download failed, but COLUMN_REASON only returns “placeholder” .

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