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# Copyright (C) 2008-2012 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""Ping plugin for bzr."""
from __future__ import absolute_import
from bzrlib.commands import Command
from bzrlib.lazy_import import lazy_import
lazy_import(globals(), """
from bzrlib import errors
from bzrlib.smart.client import _SmartClient
from bzrlib.transport import get_transport
""")
class cmd_ping(Command):
"""Pings a Bazaar smart server.
This command sends a 'hello' request to the given location using the bzr
smart protocol, and reports the response.
"""
takes_args = ['location']
def run(self, location):
transport = get_transport(location)
try:
medium = transport.get_smart_medium()
except errors.NoSmartMedium, e:
raise errors.BzrCommandError(str(e))
client = _SmartClient(medium)
# Use call_expecting_body (even though we don't expect a body) so that
# we can see the response headers (if any) via the handler object.
response, handler = client.call_expecting_body('hello')
handler.cancel_read_body()
self.outf.write('Response: %r\n' % (response,))
if getattr(handler, 'headers', None) is not None:
self.outf.write('Headers: %r\n' % (handler.headers,))