[winswitch] shifter-users Digest, Vol 26, Issue 4

Ammar Husain ammarh at andrew.cmu.edu
Thu Apr 25 16:40:31 BST 2013 

Hi Antoine,
Thanks for the response. While the Java Swing app might serve the purpose,
I was looking for something that would require no client side install. I
know the Xpra protocol works a little differently, in that it does not
stream frame buffers as in VNC. However, I was wondering if there is a way
to latch onto an Xpra DISPLAY on the server site through a web page and
stream the application (not necessarily embedded into the browser). I
guess, the main idea is to take away any client side configuration and
deliver the application through a website. There are several people in my
project group, who do not use a terminal/ have winswitch installed etc.
Thanks!
Ammar


On Thu, Apr 25, 2013 at 5:46 AM, <shifter-users-request at lists.devloop.org.uk
> wrote:

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> Today's Topics:
>
>    1. Re: xpra issuses (Randy)
>    2. xpra using cygwin ssh (kristof.ralovich at gmail.com)
>    3. Re: xpra using cygwin ssh (Antoine Martin)
>    4. Re: xpra using cygwin ssh (Antoine Martin)
>    5. Web browser based Xpra viewer (Ammar Husain)
>    6. Re: Web browser based Xpra viewer (Antoine Martin)
>    7. [ANNOUNCE] xpra 0.9.0 (Antoine Martin)
>    8. Re: xpra using cygwin ssh (kristof.ralovich at gmail.com)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 15 Apr 2013 10:35:42 -0400
> From: Randy <thejunk.b at gmail.com>
> To: shifter-users at lists.devloop.org.uk
> Subject: Re: [winswitch] xpra issuses
> Message-ID: <201304151035.42629.thejunk.b at gmail.com>
> Content-Type: text/plain;  charset="iso-8859-1"
>
> Thanks.
>
> > You should be able to workaround this problem by defining another
> > default encoding, either in /etc/xpra/xpra.conf or in ~/.xpra/xpra.conf
>
> Just got back from vacation myself only to find my systems crashed.  That
> and
> work, when I get a chance I will look into this.
>
> --
> If it ain't broke tweek it
>
>
> ------------------------------
>
> Message: 2
> Date: Tue, 23 Apr 2013 16:08:17 +0200
> From: "kristof.ralovich at gmail.com" <kristof.ralovich at gmail.com>
> To: shifter-users at lists.devloop.org.uk
> Subject: [winswitch] xpra using cygwin ssh
> Message-ID:
>         <
> CAMfbS5MwmXQKE9h8F4He_nfbyRjbiufB04F3arQMxyy4a7kO6w at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
> Dear All,
>
> I'm using xpra with great satisfaction. Recently I bumped into a issue
> while trying to attach to a server from a client behind a proxy. I've set
> up cygwin, ssh and connect-proxy to work hand-in-hand, for command line
> communication this pipeline is functional. Now, I would also like to use
> this working ssh setup for xpra too. To this end, I've changed this line
>
> ssh = c:/cygwin/bin/ssh.exe
>
> in c:\Program Files (x86)\Xpra\xpra.conf to point ssh to cygwin's. Then
> running Xpra_cmd.exe from a cygwin shell produced the output below:
>
> user at laptop /cygdrive/c/Program Files (x86)/Xpra
> $ ./Xpra_cmd.exe attach ssh:user at example.com:1001
> ** Message: pygobject_register_sinkfunc is deprecated (GstObject)
> xpra client version 0.8.8
> cannot read using ['c:/cygwin/bin/ssh.exe', '-l', 'user', '-T', '
> example.com',
> '-ssh', '-agent', '.xpra/run-xpra', '--socket-dir=~/.xpra', '_proxy',
> ':1001']: the SSH process has terminated with exit code=255
> 2013-04-23 15:03:08,441 connection closed after 0 packets received (0
> bytes) and 0 packets sent (0 bytes)
> Exception in thread format (most likely raised during interpreter
> shutdown):
>
> Is there a way to print the output of ssh for debugging? Or any hints that
> I should consider?
>
> Thanks in advance,
> Kristof
>
>
> ------------------------------
>
> Message: 3
> Date: Tue, 23 Apr 2013 21:20:00 +0700
> From: Antoine Martin <antoine at nagafix.co.uk>
> To: shifter-users at lists.devloop.org.uk
> Subject: Re: [winswitch] xpra using cygwin ssh
> Message-ID: <51769890.6030104 at nagafix.co.uk>
> Content-Type: text/plain; charset=ISO-8859-1
>
> On 04/23/2013 09:08 PM, kristof.ralovich at gmail.com wrote:
> > Dear All,
> >
> > I'm using xpra with great satisfaction. Recently I bumped into a issue
> > while trying to attach to a server from a client behind a proxy. I've set
> > up cygwin, ssh and connect-proxy to work hand-in-hand, for command line
> > communication this pipeline is functional. Now, I would also like to use
> > this working ssh setup for xpra too. To this end, I've changed this line
> >
> > ssh = c:/cygwin/bin/ssh.exe
> >
> > in c:\Program Files (x86)\Xpra\xpra.conf to point ssh to cygwin's.
> You should be modifying the user's xpra.conf rather than the system
> default, creating one if it doesn't exist.
> IIRC, on win32 this would be %APPDATA%\Xpra\xpra.conf
>
> This way it won't get overwritten with every Xpra software update.
>
> > Then
> > running Xpra_cmd.exe from a cygwin shell produced the output below:
> >
> > user at laptop /cygdrive/c/Program Files (x86)/Xpra
> > $ ./Xpra_cmd.exe attach ssh:user at example.com:1001
> > ** Message: pygobject_register_sinkfunc is deprecated (GstObject)
> > xpra client version 0.8.8
> > cannot read using ['c:/cygwin/bin/ssh.exe', '-l', 'user', '-T', '
> example.com',
> > '-ssh', '-agent', '.xpra/run-xpra', '--socket-dir=~/.xpra', '_proxy',
> > ':1001']: the SSH process has terminated with exit code=255
> > 2013-04-23 15:03:08,441 connection closed after 0 packets received (0
> > bytes) and 0 packets sent (0 bytes)
> > Exception in thread format (most likely raised during interpreter
> shutdown):
> >
> > Is there a way to print the output of ssh for debugging? Or any hints
> that
> > I should consider?
> On win32 we don't use putty.exe but plink.exe (and not the one from
> putty, but the one from tortoise to get a GUI for accepting host keys
> and asking for passwords).
> The connection stage is too early to get any meaningful debugging
> information using the "xpra -d all" flag I think.
>
> Have you tried running that ssh command line by hand to make sure it
> does work? I'm pretty sure it won't because it assumes that we're
> dealing with "plink.exe" on win32, so the flags "-ssh" and "-agent" are
> probably causing ssh.exe to abort with an error.
>
> If the patch below works for you, I guess I could use the "ssh" syntax
> when the ssh command looks like a proper ssh... ugly, but that's win32
> for you.
>
> Cheers
> Antoine
>
>
>
>
> ### Eclipse Workspace Patch 1.0
> #P Xpra
> Index: src/xpra/scripts/main.py
> ===================================================================
> --- src/xpra/scripts/main.py    (revision 3132)
> +++ src/xpra/scripts/main.py    (working copy)
> @@ -531,7 +531,7 @@
>      dtype = display_desc["type"]
>      if dtype == "ssh":
>          cmd = display_desc["full_ssh"]
> -        if sys.platform.startswith("win"):
> +        if False:
>              password = display_desc.get("password")
>              if password:
>                  cmd += ["-pw", password]
>
>
>
> ------------------------------
>
> Message: 4
> Date: Tue, 23 Apr 2013 23:34:05 +0700
> From: Antoine Martin <antoine at nagafix.co.uk>
> To: shifter-users at lists.devloop.org.uk
> Subject: Re: [winswitch] xpra using cygwin ssh
> Message-ID: <5176B7FD.2000407 at nagafix.co.uk>
> Content-Type: text/plain; charset=ISO-8859-1
>
> (snip)
> >> cannot read using ['c:/cygwin/bin/ssh.exe', '-l', 'user', '-T', '
> example.com',
> >> '-ssh', '-agent', '.xpra/run-xpra', '--socket-dir=~/.xpra', '_proxy',
> >> ':1001']: the SSH process has terminated with exit code=255
> >> 2013-04-23 15:03:08,441 connection closed after 0 packets received (0
> >> bytes) and 0 packets sent (0 bytes)
> >> Exception in thread format (most likely raised during interpreter
> shutdown):
> (snip)
> > If the patch below works for you, I guess I could use the "ssh" syntax
> > when the ssh command looks like a proper ssh... ugly, but that's win32
> > for you.
> The solution seemed simple enough so I've merged it already:
> http://xpra.org/trac/changeset/3136/xpra
>
> You can find the latest beta win32 packages with this change included
> here (r3136):
> http://xpra.org/beta/windows/
>
> Cheers
> Antoine
>
>
> ------------------------------
>
> Message: 5
> Date: Wed, 24 Apr 2013 13:11:00 -0400
> From: Ammar Husain <mrahusain at gmail.com>
> To: shifter-users at lists.devloop.org.uk
> Subject: [winswitch] Web browser based Xpra viewer
> Message-ID:
>         <
> CAPMS+Rgzoea+VmsEUOuTzDo-aJAXfmVdd4H4tBzKzHAjJGfdng at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Hi All,
> Xpra has greatly helped me to remotely connect to applications on my work
> computer. However I was wondering if there is an Xpra viewer that is
> entirely web-based? I was reading through the documentation and it seems
> like the Xpra viewer utilises the windowing system on the client machine.
> Has anyone given it a try to embed the windowing in a web browser, possibly
> using HTML5 canvas / AJAX? I mean something similar to NX WebPlayer or
> noVNC. Would it even be possible to do something like that with Xpra
> viewer? That would be of great help to me.
> Thanks,
> Ammar
>
>
> ------------------------------
>
> Message: 6
> Date: Thu, 25 Apr 2013 00:15:10 +0700
> From: Antoine Martin <antoine at nagafix.co.uk>
> To: shifter-users at lists.devloop.org.uk
> Subject: Re: [winswitch] Web browser based Xpra viewer
> Message-ID: <5178131E.7060803 at nagafix.co.uk>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Hi Ammar,
>
> There are Java versions of the client (AWT and Swing) which could be
> delivered to a browser. But:
> * this Java code is not production ready by any means
> * I've never tried doing that
> * you would lose many of the benefits of Xpra (mainly: seamlessness)
>
> Cheers
> Antoine
>
> On 04/25/2013 12:11 AM, Ammar Husain wrote:
> > Hi All,
> > Xpra has greatly helped me to remotely connect to applications on my work
> > computer. However I was wondering if there is an Xpra viewer that is
> > entirely web-based? I was reading through the documentation and it seems
> > like the Xpra viewer utilises the windowing system on the client machine.
> > Has anyone given it a try to embed the windowing in a web browser,
> possibly
> > using HTML5 canvas / AJAX? I mean something similar to NX WebPlayer or
> > noVNC. Would it even be possible to do something like that with Xpra
> > viewer? That would be of great help to me.
> > Thanks,
> > Ammar
> > _______________________________________________
> > shifter-users mailing list
> > shifter-users at lists.devloop.org.uk
> > http://lists.devloop.org.uk/mailman/listinfo/shifter-users
> >
>
>
>
> ------------------------------
>
> Message: 7
> Date: Thu, 25 Apr 2013 01:49:40 +0700
> From: Antoine Martin <antoine at nagafix.co.uk>
> To: "shifter-users at lists.devloop.org.uk"
>         <shifter-users at lists.devloop.org.uk>
> Subject: [winswitch] [ANNOUNCE] xpra 0.9.0
> Message-ID: <51782944.6010203 at nagafix.co.uk>
> Content-Type: text/plain; charset=ISO-8859-1
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Hi,
>
> This new major release brings many new features, but more importantly
> a large number of important bug fixes throughout.
>
> Here are some of the key new features and fixes:
> * remote session start: xpra start ssh:host:DISP --start-child=cmd
> * more sound codec support (wav, flac, opus..)
> * MS Windows fixes (clipboard, caps and num lock synchronization)
> * Platform fixes: IPv6 server, Python 2.4 fixes, SELinux labels, etc
> * better launcher and support for launching from ".xpra" session files
>
>
> The source:
> https://xpra.org/src/
> Binaries/repositories:
> https://winswitch.org/downloads/
> Direct binary downloads:
> https://xpra.org/dists/
>
> Cheers
> Antoine
>
> PS: as usual, the Mac OSX build failed some last minute testing and
> will be posted later.
>
>
> Full releases notes:
> - - fix focus problems with old Xvfb display servers
> - - fix RPM SELinux labelling of static codec builds (CentOS)
> - - fix CentOS 5.x compatibility
> - - fix Python 2.4 and 2.5 compatibility (many)
> - - fix clipboard with MS Windows clients
> - - fix failed server upgrades killing the virtual display
> - - fix screenshot command with "OR" windows
> - - fix support for "OR" windows that move and resize
> - - IPv6 server support
> - - support for many more audio codecs: flac, opus, wavpack, wav, speex
> - - support starting remote sessions with "xpra start"
> - - support for Xdummy with CentOS 6.4 onwards
> - - add --log-file command line option
> - - add clipboard regex string filtering
> - - add clipboard transfer in progress animation via system tray
> - - detect broken/slow connections and temporarily grey out windows
> - - reduce regular packet header sizes using numeric lookup tables
> - - allow more options in xpra config and launcher files
> - - MS Windows fixes for Caps Lock and Num Lock synchronization
> - - MS Windows and OSX builds trim the amount of GStreamer plugins shipped
> - - MS Windows, OSX and static codec builds (Ubuntu Lucid, Debian
> Squeeze) updated to libav 9.4
> - - MS Windows and OSX builds updated to use Python 2.7.4
> - - MS Windows library updates (pyasn1, numpy, webp)
> - - OSX library updates (mpfr, x264, pyasn1, numpy, webp), fixed sound
> packaging
> - - safer test for windows to ignore (window IDs starts at 1 again)
> - - expose more version and statistical data via xpra info
> - - improved OpenGL client rendering (still disabled by default)
> - - upgrade to rencode 1.0.2
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.13 (GNU/Linux)
> Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/
>
> iEYEARECAAYFAlF4KT4ACgkQGK2zHPGK1rsargCeLDdEZp1wZX2KQfywAnagSr3A
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> =5Aw+
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>
>
> ------------------------------
>
> Message: 8
> Date: Thu, 25 Apr 2013 11:45:27 +0200
> From: "kristof.ralovich at gmail.com" <kristof.ralovich at gmail.com>
> To: Antoine Martin <antoine at nagafix.co.uk>
> Cc: shifter-users at lists.devloop.org.uk
> Subject: Re: [winswitch] xpra using cygwin ssh
> Message-ID:
>         <
> CAMfbS5OvyhR22aC__5asH2gnn+qi4qq0kTLwgePOqBz3mAgBNg at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
> On Tue, Apr 23, 2013 at 6:34 PM, Antoine Martin <antoine at nagafix.co.uk
> >wrote:
>
> > (snip)
> > >> cannot read using ['c:/cygwin/bin/ssh.exe', '-l', 'user', '-T', '
> > example.com',
> > >> '-ssh', '-agent', '.xpra/run-xpra', '--socket-dir=~/.xpra', '_proxy',
> > >> ':1001']: the SSH process has terminated with exit code=255
> > >> 2013-04-23 15:03:08,441 connection closed after 0 packets received (0
> > >> bytes) and 0 packets sent (0 bytes)
> > >> Exception in thread format (most likely raised during interpreter
> > shutdown):
> > (snip)
> > > If the patch below works for you, I guess I could use the "ssh" syntax
> > > when the ssh command looks like a proper ssh... ugly, but that's win32
> > > for you.
> > The solution seemed simple enough so I've merged it already:
> > http://xpra.org/trac/changeset/3136/xpra
> >
> > You can find the latest beta win32 packages with this change included
> > here (r3136):
> > http://xpra.org/beta/windows/
> >
> > Cheers
> > Antoine
> >
>
> Dear Antoine,
>
> thank your for the quick reply! I don't have the build environment to try
> the source patch, and http://xpra.org/beta/windows/ seems to be empty when
> I've checked. I'll probably wait for the next release to try this out.
>
> Thanks a lot!
> Kristof
>
>
> > _______________________________________________
> > shifter-users mailing list
> > shifter-users at lists.devloop.org.uk
> > http://lists.devloop.org.uk/mailman/listinfo/shifter-users
> >
>
>
> ------------------------------
>
> Subject: Digest Footer
>
> _______________________________________________
> shifter-users mailing list
> shifter-users at lists.devloop.org.uk
> http://lists.devloop.org.uk/mailman/listinfo/shifter-users
>
>
> ------------------------------
>
> End of shifter-users Digest, Vol 26, Issue 4
> ********************************************
>

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