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From Avinash Narayanan <avinasha...@gmail.com>
Subject Re: SFTP file transfer for large files using flex
Date Wed, 28 Mar 2012 21:06:53 GMT
sorry!!! typo.

"Still no luck with HTTP" should've been "Still no luck with SFTP"

Thanks
Avinash Y


On Thu, Mar 29, 2012 at 2:35 AM, Avinash Narayanan <avinashapr9@gmail.com>wrote:

> Hi All,
>
> Looks like my little problem started quite the discussion!!.
>
> Ok, need to give a few updates. I managed to upload 1.07 Gb file (windows
> image file actually) via fileReference using HTTP. Still no luck with HTTP.
> And the data upload is NOT causing any increase in the usage of RAM! (very
> strange).
>
> The reason why I need the air app to upload large files is that we're
> creating some sort of sales portal using Adobe Air and the client wants to
> be able to upload these really large files which are supposed to make sense
> to the client regarding the engagement. I have no clue what this file is
> for except that its upwards of 1Gb till 2Gb.
>
> Hope this helps!
>
> Thanks
> Avinash Y
>
>
>
> 2012/3/29 Jarosław Szczepankiewicz <jszczepankiewicz@gmail.com>
>
>> Supporting rest without tunneling through post is not possible due to
>> limitations in flash player and due to plugin api limitations. Also full
>> rest answers using full http response codes are not possible due to the
>> same limitations of browser plugin api :(
>> 28-03-2012 22:46 użytkownik "Hugo Matinho" <hugo.mig@gmail.com> napisał:
>>
>> > 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
>> > unresponsive.
>> >
>> > 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.
>> >
>> > Regards,
>> >
>> > 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 possible.
>> > >
>> > > 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
>> > Principal
>> > Zavteq, Inc.
>> > @lordB8r | jp@zavteq.com
>> > 608.692.2468
>> >
>>
>
>

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