[Spice-devel] Userquestion - remote-viewer connection fails with "Connection type could not be determined by URI"

Victor Toso victortoso at redhat.com
Sat Nov 19 05:18:22 UTC 2022 

Hi,

On Fri, Nov 18, 2022 at 01:02:22PM +0100, Stefan Silberstein wrote:
> Okay - now I feel like the dumbest and worst user ever - and rightfully so.
>
> Just for the record - just incase someone else is as dumb as me...
> (Damn - i feel so embarrassed)
>
> To be able to connect fast to the virtual machine and not to forget what to
> write - I created a text file on my desktop with the command to start the
> VM as name.
> Desperate KDE tried to fulfill my wish in translating the double "//" into
> something that doesn't interfere with the naming-principles but looks like
> the user wanted it to.
>
> I then copied the command from the text file name to command line and used
> it (I thought i typed it later on from the beginning with legitimate "/" as
> well but it seems that was not the case)

You can create a shell script with the command which should work
by even double clicking with KDE's file manager.

I personally use terminal's history. With bash you can just hit
ctrl+R and type something (e.g: "re") and it'll reverse search in
your history. I use fish instead of bash, reverse history is
default and very useful indeed.

> So everytime i tried, I apparently used the old entries which weren't
> normal "/" - they never were but looked like them.
>
> Sorry for cussing - but I am such a dumbass...

It happens, don't worry.
Cheers,

>
> Frediano - may i tip you a coffee or something - I clearly owe
> you one.
>
> Stefan
> 
> Am Fr., 18. Nov. 2022 um 12:46 Uhr schrieb Frediano Ziglio <
> freddy77 at gmail.com>:
> 
> > Il giorno ven 18 nov 2022 alle ore 10:48 Stefan Silberstein
> > <linuxstony at gmail.com> ha scritto:
> > >
> > > Hope this wall of text helps you in any way :D
> > >
> > > stony at Aperture-Science:~$ history | grep spice | hexdump -C
> > > 00000000  20 31 32 30 36 20 20 72  65 6d 6f 74 65 2d 76 69  | 1206
> > remote-vi|
> > > 00000010  65 77 65 72 20 73 70 69  63 65 3a 2f 2f 31 39 32  |ewer
> > spice://192|
> > > 00000020  2e 31 36 38 2e 31 37 38  2e 35 31 3a 35 39 30 30
> > |.168.178.51:5900|
> > > 00000030  0a 20 31 32 31 30 20 20  72 65 6d 6f 74 65 2d 76  |. 1210
> > remote-v|
> > > 00000040  69 65 77 65 72 20 73 70  69 63 65 3a 2f 2f 31 39  |iewer
> > spice://19|
> > > 00000050  32 2e 31 36 38 2e 31 37  38 2e 35 31 3a 35 39 30
> > |2.168.178.51:590|
> > > 00000060  30 0a 20 31 33 30 39 20  20 72 65 6d 6f 74 65 2d  |0. 1309
> > remote-|
> > > 00000070  76 69 65 77 65 72 20 73  70 69 63 65 3a e2 81 84  |viewer
> > spice:...|
> > > 00000080  e2 81 84 31 39 32 2e 31  36 38 2e 31 37 38 2e 35
> > |...192.168.178.5|
> >
> > There you go!
> >
> > $ echo -e '\xe2\x81\x84'
> > ⁄
> >
> > that's no a ASCII slash. echo -n / | hexdump -C
> > 00000000  2f                                                |/|
> > 00000001
> >
> > (one byte, your is 3 bytes, surely not ASCII)
> >
> > ... omissis (a lot more there) ...
> >
> > > 0000179c
> > > stony at Aperture-Science:~$
> > >
> > > For now I will fade into the shadow of userdom again :)
> > >
> > > Stefan
> > >
> >
> > Frediano
> >
> > > Am Fr., 18. Nov. 2022 um 11:25 Uhr schrieb Frediano Ziglio <
> > freddy77 at gmail.com>:
> > >>
> > >> Il giorno ven 18 nov 2022 alle ore 06:08 Stefan Silberstein
> > >> <linuxstony at gmail.com> ha scritto:
> > >> >
> > >> > Hi Frediano, Hi List,
> > >> >
> > >> > after I was able to start the virtual machine with the GUI I tried
> > your command
> > >> >
> > >> > LANG=C remote-viewer spice://192.168.178.51:5900
> > >> >
> > >> > and it started right up into the virtual machine.
> > >> >
> > >> > HOWEVER
> > >> >
> > >> > even
> > >> >
> > >> > remote-viewer spice://192.168.178.51:5900
> > >> >
> > >> > now opens the virtual machine - without problems. (Yeah - i am
> > stunned myself)
> > >> >
> > >> > I slept over it then tried again today - thinking it never worked
> > again the day after...
> > >> >
> > >> > Result is that I am able to open up the VM just fine....
> > >> >
> > >> > This is the worst - something works without changing anything so I
> > have no chance of knowing what the problem is/was in the first place
> > >> >
> > >> > At a loss for words,
> > >> >
> > >> > Stefan
> > >> >
> > >>
> > >> Well, problem solved :-)
> > >>
> > >> I would check with a command like "history | grep spice | hexdump -C"
> > >> (you can post the output) for some weird input. The errors you
> > >> reported are basically (or at least they should) parsing errors for
> > >> the URI you passed.
> > >>
> > >> Frediano
> > >>
> > >>
> > >>
> > >> > Am Do., 17. Nov. 2022 um 10:30 Uhr schrieb Stefan Silberstein <
> > linuxstony at gmail.com>:
> > >> >>
> > >> >> Some details:
> > >> >> Operating System: Kubuntu 22.04
> > >> >> KDE Plasma Version: 5.24.6
> > >> >> KDE Frameworks Version: 5.92.0
> > >> >> Qt Version: 5.15.3
> > >> >> Kernel Version: 5.15.0-53-generic (64-bit)
> > >> >> Graphics Platform: X11
> > >> >> Processors: 8 × AMD Ryzen 5 1500X Quad-Core Processor
> > >> >> Memory: 15.6 GiB of RAM
> > >> >> Graphics Processor: NVIDIA GeForce GTX 1050 Ti/PCIe/SSE2
> > >> >>
> > >> >> Opening a Konsole "bash":
> > >> >>
> > >> >> Konsole
> > >> >> Version 21.12.3
> > >> >>
> > >> >>
> > >> >> Locale:
> > >> >>
> > >> >> stony at Aperture-Science:~$ locale LANG=de_DE.UTF-8 LANGUAGE=
> > LC_CTYPE="de_DE.UTF-8" LC_NUMERIC="de_DE.UTF-8" LC_TIME="de_DE.UTF-8"
> > LC_COLLATE="de_DE.UTF-8" LC_MONETARY="de_DE.UTF-8"
> > LC_MESSAGES="de_DE.UTF-8" LC_PAPER="de_DE.UTF-8" LC_NAME="de_DE.UTF-8"
> > LC_ADDRESS="de_DE.UTF-8" LC_TELEPHONE="de_DE.UTF-8"
> > LC_MEASUREMENT="de_DE.UTF-8" LC_IDENTIFICATION="de_DE.UTF-8" LC_ALL=
> > >> >>
> > >> >> I will try to open it today at noon - during my lunch break.
> > >> >> (ATM I am glad it works because i gotta work from home and this
> > windows-machine is the only way to connect to the Server in my company for
> > me)
> > >> >>
> > >> >> I will get back to you in approximately two hours.
> > >> >>
> > >> >> Stefan
> > >> >>
> > >> >> Am Do., 17. Nov. 2022 um 10:18 Uhr schrieb Frediano Ziglio <
> > freddy77 at gmail.com>:
> > >> >>>
> > >> >>> Il giorno gio 17 nov 2022 alle ore 09:13 Stefan Silberstein
> > >> >>> <linuxstony at gmail.com> ha scritto:
> > >> >>> >
> > >> >>> > Hi,
> > >> >>> >
> > >> >>> > no this is the normal forward-slash with "shift+7" on the german
> > keyboard - googlemail messed it up translating it to something else.
> > >> >>> > The URL  is normally typed.
> > >> >>> >
> > >> >>> > This is really weird and I will try to help you as much as I can
> > to get to the bottom of it.
> > >> >>> >
> > >> >>> > Stefan
> > >> >>> >
> > >> >>>
> > >> >>> That's pretty weird. That code has been there for ages. I tried but
> > no
> > >> >>> problems for me.
> > >> >>> This operating system and version are you using?
> > >> >>> Which shell?
> > >> >>> Maybe it's the locale? Try launching something like "LANG=C
> > >> >>> remote-viewer spice://192.168.178.51:5900" (LANG environment
> > change)
> > >> >>>
> > >> >>> Frediano
> > >> >>>
> > >> >>> > Am Do., 17. Nov. 2022 um 10:08 Uhr schrieb Frediano Ziglio <
> > freddy77 at gmail.com>:
> > >> >>> >>
> > >> >>> >> Il giorno gio 17 nov 2022 alle ore 07:57 Stefan Silberstein
> > >> >>> >> <linuxstony at gmail.com> ha scritto:
> > >> >>> >> >
> > >> >>> >> > Hello again,
> > >> >>> >> >
> > >> >>> >> > so - yesterday I worked from home - as I wrote I was able to
> > connect by specifying the user root with "remote-viewer spice://
> > root at 192.168.178.51:5900"
> > >> >>> >> >
> > >> >>> >> > Today I want to connect the exact same way (yesterday i simply
> > closed the remote-viewer window and the server keept on running so the
> > windows-VM was running the whole night) - and I can not connect.
> > >> >>> >> >
> > >> >>> >> > Error Message on the console  "** (remote-viewer:6146):
> > CRITICAL **: 07:55:52.853: virt_viewer_util_extract_host: assertion 'uri !=
> > NULL' failed"
> > >> >>> >> > Error Message on the popup says translated: Connectiontype
> > could not be determined by URI.
> > >> >>> >> >
> > >> >>> >>
> > >> >>> >> Hi,
> > >> >>> >>    That means that the code was not able to parse the URI.
> > >> >>> >>
> > >> >>> >> > IP of the server itself is 192.168.178.51
> > >> >>> >> > IP of the Virtual Machine is 192.168.178.64 and i pingable
> > >> >>> >> > Port 5900 on the server is open: 5900/tcp open  vnc
> > >> >>> >> > remote-viewer --spice-debug spice:⁄⁄192.168.178.51:5900 does
> > not produce a more verbose output :(
> > >> >>> >> >
> > >> >>> >>
> > >> >>> >> In this example you are not using ASCII slashes (//), maybe
> > that's the problem.
> > >> >>> >>
> > >> >>> >> > Update in the meantime
> > >> >>> >> > But maybe this is helpful to you:
> > >> >>> >> >
> > >> >>> >> > I simply started "remote-viewer --spice-debug"
> > >> >>> >> > Then i got the GUI (which i wasnt even aware it existed).
> > >> >>> >> >
> > >> >>> >> > When I choose the same entry on that list - I AM able to
> > connect.
> > >> >>> >> >
> > >> >>> >> > So the error only exists only when I try to connect via
> > command line?! (This is when I am able to connect tomorrow via GUI ;) )
> > >> >>> >> >
> > >> >>> >> > Shouldn't this be the same ?
> > >> >>> >> >
> > >> >>> >> > I mabe I can help - maybe this is indeed a bug?
> > >> >>> >> >
> > >> >>> >> > Stefan
> > >> >>> >> >
> > >> >>> >>
> > >> >>> >> Frediano
> > >> >>> >>
> > >> >>> >> > Am Mi., 16. Nov. 2022 um 09:37 Uhr schrieb Victor Toso <
> > victortoso at redhat.com>:
> > >> >>> >> >>
> > >> >>> >> >> On Wed, Nov 16, 2022 at 09:27:21AM +0100, Stefan Silberstein
> > wrote:
> > >> >>> >> >> > I appreciate the time to answer me.
> > >> >>> >> >> >
> > >> >>> >> >> > In the meantime (out of desperation because i needed the
> > virtualmachine for
> > >> >>> >> >> > work) I gave it a go with specifying root as user and not
> > the servers
> > >> >>> >> >> > username "server".
> > >> >>> >> >> >
> > >> >>> >> >> > I was able to connect to the virtual Windows10 installation
> > with
> > >> >>> >> >> >
> > >> >>> >> >> > remote-viewer spice://root@192.168.178.51:5900
> > >> >>> >> >>
> > >> >>> >> >> Cool
> > >> >>> >> >>
> > >> >>> >> >> > But again - then I dont unterstand why it worked as user and
> > >> >>> >> >> > later on with specifying the user later on (which doesn't
> > work
> > >> >>> >> >> > right now anymore)
> > >> >>> >> >> >
> > >> >>> >> >> > So it is a permissions problem on my side and I successfully
> > >> >>> >> >> > wasted your time. :/
> > >> >>> >> >> >
> > >> >>> >> >> > Sorry about that.
> > >> >>> >> >>
> > >> >>> >> >> Don't worry about that. Happy to hear it worked.
> > >> >>> >> >>
> > >> >>> >> >> >
> > >> >>> >> >> > This happens when "users" try to play with the big boys
> > toys :D
> > >> >>> >> >> >
> > >> >>> >> >> > Have a nice day you all and thanks for your time.
> > >> >>> >> >>
> > >> >>> >> >> You too.
> > >> >>> >> >> Cheers,
> > >> >>> >> >>
> > >> >>> >> >> >
> > >> >>> >> >> > Stefan
> > >> >>> >> >> >
> > >> >>> >> >> > Am Mi., 16. Nov. 2022 um 09:21 Uhr schrieb Victor Toso <
> > >> >>> >> >> > victortoso at redhat.com>:
> > >> >>> >> >> >
> > >> >>> >> >> > > Hi Stefan,
> > >> >>> >> >> > >
> > >> >>> >> >> > > On Tue, Nov 15, 2022 at 09:53:05PM +0100, Stefan
> > Silberstein wrote:
> > >> >>> >> >> > > > Hello developers,
> > >> >>> >> >> > > >
> > >> >>> >> >> > > > I can imagine that this will be an annoying question
> > for you -
> > >> >>> >> >> > > > so I apologize in advance.
> > >> >>> >> >> > > >
> > >> >>> >> >> > > > I am a user - with a longer history with linux BUT i am
> > >> >>> >> >> > > > completely new to virtualization.
> > >> >>> >> >> > > > Due to the fact that I got a server donated to me I
> > wanted to
> > >> >>> >> >> > > > give it a go and it worked like a charm.
> > >> >>> >> >> > > >
> > >> >>> >> >> > > > Installed virt-manager, installed Windows10  connected
> > with
> > >> >>> >> >> > > > virt-manager - absolutely no problem.
> > >> >>> >> >> > > >
> > >> >>> >> >> > > > Due to the fact that I need dual monitors I learned
> > that I
> > >> >>> >> >> > > > could add another display and connect with spice - and
> > it
> > >> >>> >> >> > > > worked immediately.
> > >> >>> >> >> > > >
> > >> >>> >> >> > > > BUT - without me changing anything (consciously) I
> > wasn't able
> > >> >>> >> >> > > > to connect to the virtual machine the next week.
> > >> >>> >> >> > > >
> > >> >>> >> >> > > > It refuses with "Verbindungstyp konnte nicht von URI
> > ermittelt werden"
> > >> >>> >> >> > > > (Connection type could not be determined by URI)
> > >> >>> >> >> > > >
> > >> >>> >> >> > > > Then i tried to connect with sudo and specifying the
> > user in
> > >> >>> >> >> > > > the command line and it once again connected:
> > >> >>> >> >> > > >
> > >> >>> >> >> > > > sudo remote-viewer  spice:⁄⁄server at 192.168.178.51:5900
> > >> >>> >> >> > >
> > >> >>> >> >> > > Perhaps the URL is the problem. If the IP is
> > 192.168.178.51 and
> > >> >>> >> >> > > the port for the VM is 5900, then try
> > >> >>> >> >> > >
> > >> >>> >> >> > >     remote-viewer spice://192.168.178.51:5900
> > >> >>> >> >> > >
> > >> >>> >> >> > > If server is a dns that can be resolved, should be fine
> > to use it
> > >> >>> >> >> > > instead of ip address
> > >> >>> >> >> > >
> > >> >>> >> >> > >     remote-viewer spice://server:5900
> > >> >>> >> >> > >
> > >> >>> >> >> > >
> > >> >>> >> >> > > > And now - again without changing anything - it doesn't
> > connect
> > >> >>> >> >> > > > with that command as well.
> > >> >>> >> >> > > >
> > >> >>> >> >> > > > I have sadly NO clue whatsoever where to even search
> > for a
> > >> >>> >> >> > > > solution - the internet didn't help me here...
> > >> >>> >> >> > > >
> > >> >>> >> >> > > > Do you have any hint at all what I might do wrong here?
> > >> >>> >> >> > > >
> > >> >>> >> >> > > > The machine is available - the port is open and visible
> > >> >>> >> >> > > > PORT     STATE SERVICE
> > >> >>> >> >> > > > 22/tcp   open  ssh
> > >> >>> >> >> > > > 80/tcp   open  http
> > >> >>> >> >> > > > 3389/tcp open  ms-wbt-server
> > >> >>> >> >> > > > 5900/tcp open  vnc
> > >> >>> >> >> > > >
> > >> >>> >> >> > > > ufw on the server is shut down.
> > >> >>> >> >> > > >
> > >> >>> >> >> > > > ANY help would be greatly appreciated.
> > >> >>> >> >> > >
> > >> >>> >> >> > > You can get more verbose information of issues with
> > --spice-debug
> > >> >>> >> >> > > command line option too.
> > >> >>> >> >> > >
> > >> >>> >> >> > > Cheers,
> > >> >>> >> >> > > Victor
> > >> >>> >> >> > >
> >
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