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direct_client.py
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direct_client.py
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#!/usr/bin/env python3.6
#
# Copyright (c) 2013-2018 by Ron Frederick <ronf@timeheart.net> and others.
#
# This program and the accompanying materials are made available under
# the terms of the Eclipse Public License v2.0 which accompanies this
# distribution and is available at:
#
# http://www.eclipse.org/legal/epl-2.0/
#
# This program may also be made available under the following secondary
# licenses when the conditions for such availability set forth in the
# Eclipse Public License v2.0 are satisfied:
#
# GNU General Public License, Version 2.0, or any later versions of
# that license
#
# SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
#
# Contributors:
# Ron Frederick - initial implementation, API, and documentation
import asyncio, asyncssh, sys
class MySSHTCPSession(asyncssh.SSHTCPSession):
def data_received(self, data, datatype):
# We use sys.stdout.buffer here because we're writing bytes
sys.stdout.buffer.write(data)
def connection_lost(self, exc):
if exc:
print('Direct connection error:', str(exc), file=sys.stderr)
async def run_client():
async with asyncssh.connect('localhost') as conn:
chan, session = await conn.create_connection(MySSHTCPSession,
'www.google.com', 80)
# By default, TCP connections send and receive bytes
chan.write(b'HEAD / HTTP/1.0\r\n\r\n')
chan.write_eof()
await chan.wait_closed()
try:
asyncio.get_event_loop().run_until_complete(run_client())
except (OSError, asyncssh.Error) as exc:
sys.exit('SSH connection failed: ' + str(exc))