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From Hugo Matinho <hugo....@gmail.com>
Subject RE: SFTP file transfer for large files using flex
Date Wed, 28 Mar 2012 20:45:45 GMT
I know this might be the wrong place to ask and there is of course the
limitation on how the FP handles the HTTP transport but couldn't we do
something about flex supporting REST natively it's been several years
already and yes there's blazeDS and GraniteDS and others but most
JavaScript libraries support it natively most modern browsers implement
it and it wasn't made available on the player because browsers didn't
had it back then but come on it's 2012 some rest support would be nice

Sent from my Windows Phone
From: Ariel Jakobovits
Sent: 28-03-2012 21:07
To: flex-dev@incubator.apache.org
Subject: Re: SFTP file transfer for large files using flex
> I might be off, but I don't think an ANE is, or would be, part of Flex.  It is an
extension for AIR.

Flex has components intended only for AIR (such as FileSystemList),
and offering a component that exists as an ANE/AS combo that can be
added to a project to upload large files does not seem out of the
scope of Flex.

Ariel Jakobovits
Email: arieljake@yahoo.com
Phone: 650-690-2213
Fax: 650-641-0031
Cell: 650-823-8699

 From: JP Bader <jp@zavteq.com>
To: flex-dev@incubator.apache.org; Ariel Jakobovits <arieljake@yahoo.com>
Sent: Wednesday, March 28, 2012 12:04 PM
Subject: Re: SFTP file transfer for large files using flex

I might be off, but I don't think an ANE is, or would be, part of
Flex.  It is an extension for AIR, which is still controlled by Adobe.
If we want to see about spawning new threads that could consume a
massive dump of data files, process, and pass those into a service
(FTP/SFTP/REST/Telnet/etc), that seems like a bit outside of scope of
the Flex project, and more in line w/ Tamarin.

We are working on the framework, which currently has limitations to
the FP and AIR (which are Adobe).  Potentially once we have access to
Falcon(JS), there might be alternatives, but my question is, what 2GB
file are you trying to have FP/AIR upload?  There might be some tricks
to chunking out the flow of data using byte arrays, and clearing them
out as you go along with loading them to whatever repository/location
you need, but I can't think of too many desktop applications that will
not just freeze up when you load a 2GB (or any major file) into it.
For video, that's one thing, but beyond a certain size, and normally
the machine itself will slow down/become unresponsive.

Most enterprises where I have done work, accessing and uploading
massive amounts of data would be FTP via terminals or clients, not
through a separate app (especially not AIR).  Maybe I'm missing the
reason behind wanting FP/AIR to handle that much data, but given the
limitations of FP/AIR for processing data, I am not sure how you would
approach building that into the framework.  I guess examples of
BigAssCanvas show that you could stitch together large files (larger
than FP would allow), but once you get to a certain size, it becomes

If there is a way to do it, I apologize for going off tangent, but we
need to focus on getting bugs fixed and improving the framework first,
and I'm not sure this is an improvement of the current framework so
much as a nice feature request.


On Wed, Mar 28, 2012 at 1:14 PM, Ariel Jakobovits <arieljake@yahoo.com> wrote:
> would we consider developing ANEs to incorporate into Flex?
> Ariel Jakobovits
> Email: arieljake@yahoo.com
> Phone: 650-690-2213
> Fax: 650-641-0031
> Cell: 650-823-8699
> ________________________________
>  From: Marcus Fritze <marcus.fritze@googlemail.com>
> To: flex-dev@incubator.apache.org; Marcus Fritze <marcus.fritze@googlemail.com>
> Sent: Wednesday, March 28, 2012 10:34 AM
> Subject: Re: SFTP file transfer for large files using flex
> Hi,
> as maybe all know Flash supports only a file size of 100MB.
> from the docs:
> FileReference -> upload()
>> Although Flash Player has no restriction on the size of files you can upload or download,
the player officially supports uploads or downloads of up to 100 MB.
> I experienced that an upload / download of a larger file via Flash (FileReference) is
> I agree with Avinash! I think this is a good place to discuss this topic (and not the
stack overflow forum). Because this mailing list is the place where we can improve the Flex
SDK / Flash.
> Correct me if I am wrong, but an upload of large files (2 GB or more) is currently not
possible in Flash. And maybe we can check if it is possible to enable a larger file upload
/ download via Flex / Flash. This feature is very useful for Enterprise RIA's. I have already
developed such an app and have the same problem.
> Thanks!
> Marcus
> Am 28.03.2012 um 16:55 schrieb Avinash Narayanan:
>> Hi JP,
>> Thanks for taking time to reply! Stackoverflow had questions like this but
>> not satisfactory answers. This was my last ditch effort since the other
>> option is to write my own SFTP plug (which clients wont pay me to do :|).
>> As for the apps, this upload needs to be 'part' of a desktop application
>> written in adobe air so can't use any of these other tools :(
>> Thanks
>> Avinash Y
>> On Wed, Mar 28, 2012 at 6:54 PM, JP Bader <jp@zavteq.com> wrote:
>>> Hi Avinash,
>>> My quick take on this is why you would want to recreate a tool for
>>> this?  Aren't there plenty of free SFTP apps already?  Why not take
>>> advantage of one of them? Tortoise, Cute, WinSCP, FileZilla, etc.
>>> Also, questions like these might be better asked on other forums like
>>> stack overflow.  This mailing list is for questions and development
>>> regarding the next release of Flex.
>>> Regards,
>>> JP
>>> On Wed, Mar 28, 2012 at 3:16 AM, Avinash Narayanan
>>> <avinashapr9@gmail.com> wrote:
>>>> Hi All,
>>>> I know this community is meant for future development of Apache Flex but
>>>> I'm a little lost here. I need to upload ~2Gb file from my local machine
>>> to
>>>> a url via an air app using sftp. problem is we don't have sftp lib
>>>> available.
>>>> Also, I'm confused as to why in forums it says the flash player needs to
>>>> take the entire file into memory before loading it but I don't see any
>>>> memory increase in my task manager (using the fileReference class).
>>>> Another thing I wanted to know is how best to split up the file into
>>> chunks
>>>> for multi-part loading? Any help in any of these areas will be supremely
>>>> helpful!
>>>> I've already seen the following links
>>>> http://www.actionscript.org/forums/showthread.php3?t=181895
>>>> http://forums.adobe.com/thread/631103
>>>> http://blog.ansuz.nl/index.php/2011/02/11/flex-ftp-abort/
>>>> http://maliboo.pl/projects/FlexFTP/
>>>> http://forums.adobe.com/thread/245294
>>> http://blog.flexexamples.com/2007/09/21/uploading-files-in-flex-using-the-filereference-class/
>>>> Thanks in Advance.
>>>> With Warm Regards,
>>>> Avinash
>>> --
>>> JP Bader
>>> Principal
>>> Zavteq, Inc.
>>> @lordB8r | jp@zavteq.com
>>> 608.692.2468

JP Bader
Zavteq, Inc.
@lordB8r | jp@zavteq.com

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