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From Clint Modien <cmod...@gmail.com>
Subject Re: SFTP file transfer for large files using flex
Date Wed, 28 Mar 2012 21:44:50 GMT
You could use psftp for sftp on windows.

Download - http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html
Help Page - http://the.earth.li/~sgtatham/putty/0.62/htmldoc/Chapter6.html#psftp
MIT License - http://www.chiark.greenend.org.uk/~sgtatham/putty/licence.html

You can distribute it with your air app and invoke it using standard io.

http://help.adobe.com/en_US/air/html/dev/WSb2ba3b1aad8a27b060d22f991220f00ad8a-8000.html

On Mac you can use the built in sftp command line util.

On Mar 28, 2012, at 2:05 PM, Avinash Narayanan 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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