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ibquery.py
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ibquery.py
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# This program is licensed under the BSD 2-Clause License:
#
# Copyright (c) 2015, Florian Wesch <[email protected]>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the
# distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import re
import socket
from collections import namedtuple
class InfoBeamerQueryException(Exception):
pass
class InfoBeamerQuery(object):
def __init__(self, host='127.0.0.1', port=4444):
self._sock = None
self._conn = None
self._host = host
self._port = port
self._timeout = 2
self._version = None
def _reconnect(self):
if self._conn is not None:
return
try:
self._sock = socket.create_connection((self._host, self._port), self._timeout)
self._conn = self._sock.makefile()
intro = self._conn.readline()
except socket.timeout:
self._reset()
raise InfoBeamerQueryException("Timeout while reopening connection")
except socket.error as err:
self._reset()
raise InfoBeamerQueryException("Cannot connect to %s:%s: %s" % (
self._host, self._port, err))
m = re.match("^Info Beamer PI ([^ ]+)", intro)
if not m:
self._reset()
raise InfoBeamerQueryException("Invalid handshake. Not info-beamer?")
self._version = m.group(1)
def _parse_line(self):
line = self._conn.readline()
if not line:
return None
return line.rstrip()
def _parse_multi_line(self):
lines = []
while 1:
line = self._conn.readline()
if not line:
return None
line = line.rstrip()
if not line:
break
lines.append(line)
return '\n'.join(lines)
def _send_cmd(self, min_version, cmd, multiline=False):
for retry in (1, 2):
self._reconnect()
if self._version <= min_version:
raise InfoBeamerQueryException(
"This query is not implemented in your version of info-beamer. "
"%s or higher required, %s found" % (min_version, self._version)
)
try:
self._conn.write(cmd + "\n")
self._conn.flush()
response = self._parse_multi_line() if multiline else self._parse_line()
if response is None:
self._reset()
continue
return response
except socket.error:
self._reset()
continue
except socket.timeout:
self._reset()
raise InfoBeamerQueryException("Timeout waiting for response")
except Exception:
self._reset()
continue
raise InfoBeamerQueryException("Failed to get a response")
def _reset(self, close=True):
if close:
try:
if self._conn: self._conn.close()
if self._sock: self._sock.close()
except:
pass
self._conn = None
self._sock = None
@property
def addr(self):
return "%s:%s" % (self._host, self._port)
def close(self):
self._reset()
@property
def ping(self):
"tests if info-beamer is reachable"
return self._send_cmd(
"0.6", "*query/*ping",
) == "pong"
@property
def uptime(self):
"returns the uptime in seconds"
return int(self._send_cmd(
"0.6", "*query/*uptime",
))
@property
def objects(self):
"returns the number of allocated info-beamer objects"
return int(self._send_cmd(
"0.9.4", "*query/*objects",
))
@property
def version(self):
"returns the running info-beamer version"
return self._send_cmd(
"0.6", "*query/*version",
)
@property
def fps(self):
"returns the FPS of the top level node"
return float(self._send_cmd(
"0.6", "*query/*fps",
))
ResourceUsage = namedtuple("ResourceUsage", "user_time system_time memory")
@property
def resources(self):
"returns information about used resources"
return self.ResourceUsage._make(int(v) for v in self._send_cmd(
"0.6", "*query/*resources",
).split(','))
ScreenSize = namedtuple("ScreenSize", "width height")
@property
def screen(self):
"returns the native screen size"
return self.ScreenSize._make(int(v) for v in self._send_cmd(
"0.8.1", "*query/*screen",
).split(','))
@property
def runid(self):
"returns a unique run id that changes with every restart of info-beamer"
return self._send_cmd(
"0.9.0", "*query/*runid",
)
@property
def nodes(self):
"returns a list of nodes"
nodes = self._send_cmd(
"0.9.3", "*query/*nodes",
).split(',')
return [] if not nodes[0] else nodes
class Node(object):
def __init__(self, ib, path):
self._ib = ib
self._path = path
@property
def mem(self):
"returns the Lua memory usage of this node"
return int(self._ib._send_cmd(
"0.6", "*query/*mem/%s" % self._path
))
@property
def fps(self):
"returns the framerate of this node"
return float(self._ib._send_cmd(
"0.6", "*query/*fps/%s" % self._path
))
def io(self, raw=True):
"creates a tcp connection to this node"
status = self._ib._send_cmd(
"0.6", "%s%s" % ("*raw/" if raw else '', self._path),
)
if status != 'ok!':
raise InfoBeamerQueryException("Cannot connect to node %s" % self._path)
sock = self._ib._sock
sock.settimeout(None)
return self._ib._conn
@property
def has_error(self):
"queries the error flag"
return bool(int(self._ib._send_cmd(
"0.8.2", "*query/*has_error/%s" % self._path,
)))
@property
def error(self):
"returns the last Lua traceback"
return self._ib._send_cmd(
"0.8.2", "*query/*error/%s" % self._path, multiline=True
)
def __repr__(self):
return "%s/%s" % (self._ib, self._path)
def node(self, node):
return self.Node(self, node)
def __repr__(self):
return "<info-beamer@%s>" % self.addr
if __name__ == "__main__":
import sys
ib = InfoBeamerQuery(sys.argv[1] if len(sys.argv) > 1 else "127.0.0.1")
print("%s is running %s. current fps: %d, uptime: %dsec" % (ib.addr, ib.version, ib.fps, ib.uptime))