upload large file to webserver from 2MB heap phone

[chiovari]

I have do do an app that upload the content of a storage card to
a webserver.

Everything is ok for small files but i get Out of Memory for files that are larger > 1,5 MB.

I upload the file as you see below

1) FileConnection srcroot = (FileConnection) Connector.open(path, Connector.READ);

2) hcon = (HttpConnection) Connector.open(formUrl(), Connector.READ_WRITE);
hcon.setRequestMethod(HttpConnection.POST);
hcon.setRequestProperty("Cache-Control", "no-cache");
hcon.setRequestProperty("Content-Type", "application/octet-stream");
is = srcroot.openInputStream();
//open output stream and send contents of byte array
os = hcon.openDataOutputStream();

3)
byte[] data = new byte[bufferSize];
for (int count; (count = is.read(data)) > 0 {
os.write(data, 0, count);
//os.flush();
//Runtime.getRuntime().gc();
}
//os.flush()

4) close all connections and streams


I tried different secnarios on commented code with flush, without flush, with gc without gc with different buffer size etc...but no luck on large file (like mp3) ==> OOME ...

What should i do to upload large files from phone with 2MB heap ?

THX

[jappit]

Hi chiovari,

I've never directly faced this issue, but reading on these Boards it seems to be someway related to OutputStream buffering before data is actually sent.

One workaround you could try is this (a bit tricky): use multiple connections to send small data chunks, and then let the server put them all together, rebuilding the original file.

Hope it helps,
Pit