I don't think so, but that's a good idea. Let me see... Ouch. We'd
need to decompress and optionally decrypt the bytes on the fly as they
were read. Not a quick fix by any stretch.
What happens internally, is that we call getStreamBytesRaw, which
returns the compressed, decrypted bytes. Those bytes are then fed into
decodeBytes, and that output is returned from getStreamBytes().
The peak usage is looking like "bytes in the file" + "decompressed
bytes" (200mb in your case). If there's crypto involved, you'll have
two byte arrays of "bytes in the file" length. I'd expect the GC to get
rid of the encrypted bytes during the hunt for the 200mb byte array.
There's an OutputStreamEncryption for writing data to be encrypted, but
I don't see a cooresponding InputStreamEncryption. Nope... and the
decompression code is all byte-based.
--Mark Storer
Senior Software Engineer
Cardiff.com
import legalese.Disclaimer;
Disclaimer<Cardiff> DisCard = null;
________________________________
From: stefano fontanel [mailto:stefano.fonta...@gmail.com]
Sent: Thursday, November 18, 2010 6:47 AM
To: itext-questions@lists.sourceforge.net
Subject: [iText-questions] OutOfMemoryError extracting large
sizedattachment from a pdf
Hi all,
I'm trying to extract an attachment from a pdf file (previously
created with itext). I used the code of extractDocLevelAttachments()
method as suggested at page http://itextpdf.com/examples/iia.php?id=290.
It works for "normal sized" attachments. When I try to extract
"large sized" files (e.g. more than 200 MB) i receive a
java.lang.OutOfMemoryError.
I think the trouble is on method PdfReader.getStreamBytes(..)
which returns a byte[]. I know i can increase JVM size but i would like
to know if there is an alternative to receive something like an
InputStream with itext api..
I'm using itext 5.0.4.
Thanks in advance.
Stefano
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