[ovirt-users] overt viewer on mac osx

[Paul Heinlein]

On Wed, 24 Sep 2014, Bill Dossett wrote:

> I have downloaded and installed per the instructions - and then 
> downloaded the console.vv file and run the command line to start the 
> viewer with the console.vv - the first time it popped up and then 
> said that spice needed authentication… tried my virt-engine password 
> that didn’t work, hit cancel and it shut down.  Tried it again and 
> now it just says it can’t determine the connection type from uri and 
> I have to quit.
> 
> I am running OSX 10.9.4 and apparently this has only been tested on 
> 10.9.1… hoping there is a fix to make this work, or am I doing 
> something wrong?  The command I am using is

If you're willing to use VNC instead of SPICE, the attached python 
script will parse console.vv and pass the relevant information to the 
Mac Screen Sharing application (or whatever app you use to open vnc:// 
URLs).

Once you've downloaded console.vv, just run the script. By default, 
the script will look for ~/Downloads/console.vv, but that can be 
changed on the command line.

-- 
Paul Heinlein
heinlein at madboa.com
45°38' N, 122°6' W
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#!/usr/bin/python
#
# oVirt Engine 3.3 will send a user requesting a console a little
# ini-style file with the host/port/password information necessary
# for connecting to a VM via VNC. On a Mac, that file (typically
# named console.vv) is useless as-is. This script parses console.vv
# and passes a vnc:// URL to /usr/bin/open.
#
# A reasonable console.vv file will look something like this:
#
# [virt-viewer]
# type=vnc
# host=your.host.com
# port=5907
# password=ZOrRmRBNlzaK
# delete-this-file=1
# title=VNC
#
# From that file, this script will create a vnc url. The Mac
# Screen Sharing application will accept an old-style URL with
# a username:password prepended to the hostname; oVirt doesn't
# provide a username, so we leave that blank. In the example
# above, the resulting URL would be
#
#   vnc://:ZOrRmRBNlzaK@your.host.com:5907
#
# Since ovirt-assigned vnc passwords expire after 120 seconds, this
# script by default will delete the ini file after parsing it.
#
# ======================================================================

import ConfigParser, argparse, subprocess, sys, os.path

# open(1) knows how to deal with various file and string types
opener = "/usr/bin/open"
# define the correct section name in console.vv
header = "virt-viewer"
# the default location of the ini file; this can be overridden
# by passing the filename to the script
defaultvv = os.path.expandvars( "${HOME}/Downloads/console.vv" )

# set up the ArgumentParser
parser = argparse.ArgumentParser(
  description='Parse and execute virt-viewer VNC ini file',
  epilog='The console.vv file must have a [virt-viewer] heading, a type=vnc entry, and entries for host, port, and password to parse correctly.')
parser.add_argument( '-k', '--keep', action='store_true',
  help='keep vvfile after parsing (default is to delete it)')
parser.add_argument( 'vvfile',
  nargs='?',
  default=defaultvv,
  help='console.vv file from oVirt (default: ~/Downloads/console.vv)')
args = parser.parse_args()

# make sure the file is readable
if not os.path.isfile(args.vvfile):
  sys.stderr.write( args.vvfile + " is not readable or doesn't exist.\n" )
  parser.print_usage(file=sys.stderr)
  sys.exit()

### parse the config file
c = ConfigParser.ConfigParser()
try:
  c.read( args.vvfile )
except ConfigParser.Error:
  sys.stderr.write( args.vvfile + " doesn't parse correctly.\n" )
  sys.stderr.write( "Are you sure you got it from the right place?\n" )
  sys.exit()

# make sure we have a virt-viewer section
try:
  c.has_section( header )
except ConfigParser.NoSectionError:
  sys.stderr.write( "Cannot find necessary [" + header + "] section.\n" )
  sys.exit()

# make sure that, within the virt-viewer section, there's a type=vnc
# option
try:
  c.has_option( header, 'type' )
except ConfigParser.NoOptionError:
  sys.stderr.write( "Cannot find necessary 'type' option.\n" )
  sys.exit()

if not 'vnc' == c.get( header, 'type' ):
  sys.stderr.write( "'type' option option is not 'vnc'.\n" )
  sys.exit()

# grab the hostname.
try:
  rhost = c.get( header, 'host' )
except ConfigParser.NoOptionError:
  sys.stderr.write( "Cannot find host definition.\n" )
  sys.exit()

# grab the port value, make sure it's an integer, and test that it's
# roughly in the correct range (5900-5950) for VNC sessions
try:
  strport = c.get( header, 'port' )
except ConfigParser.NoOptionError:
  sys.stderr.write( "Cannot find port definition.\n" )
  sys.exit()

try:
  rport = int(strport)
except ValueError:
  sys.stderr.write( "The listed port is not an integer.\n" )
  sys.exit()

if rport < 5900:
  sys.stderr.write( "The port (" + strport + ") is an unexpected number.\n" )
  sys.exit()
if rport > 5950:
  sys.stderr.write( "The port (" + strport + ") is an unexpected number.\n" )
  sys.exit()

# grab the password
try:
  rpass = c.get( header, 'password' )
except ConfigParser.NoOptionError:
  sys.stderr.write( "Cannot find password definition.\n" )
  sys.exit()

# build old-style URL with password prepended to the hostname
vncurl = "vnc://:%s@%s:%d" % ( rpass, rhost, rport )

# remove the vvfile unless user has specfically asked to keep it
if not args.keep:
  os.remove( args.vvfile )

# whew. we got here. now launch the opener app.
subprocess.call( [opener, vncurl] )

#
# eof
#