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infobeamer-testcard/hosted.py

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initial commit
2023-03-14 08:55:54 +00:00
#
# Part of info-beamer hosted. You can find the latest version
# of this file at:
#
# https://github.com/info-beamer/package-sdk
#
# Copyright (c) 2014-2020 Florian Wesch <fw@info-beamer.com>
# 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.
VERSION = "1.9"
import os, re, sys, json, time, traceback, marshal, hashlib
import errno, socket, select, threading, Queue, ctypes
import pyinotify, requests
from functools import wraps
from collections import namedtuple
from tempfile import NamedTemporaryFile
types = {}
def init_types():
def type(fn):
types[fn.__name__] = fn
return fn
@type
def color(value):
return value
@type
def string(value):
return value
@type
def text(value):
return value
@type
def section(value):
return value
@type
def boolean(value):
return value
@type
def select(value):
return value
@type
def duration(value):
return value
@type
def integer(value):
return value
@type
def float(value):
return value
@type
def font(value):
return value
@type
def device(value):
return value
@type
def resource(value):
return value
@type
def device_token(value):
return value
@type
def json(value):
return value
@type
def custom(value):
return value
@type
def date(value):
return value
init_types()
def log(msg, name='hosted.py'):
sys.stderr.write("[{}] {}\n".format(name, msg))
def abort_service(reason):
log("restarting service (%s)" % reason)
os._exit(0)
time.sleep(2)
os.kill(os.getpid(), 2)
time.sleep(2)
os.kill(os.getpid(), 15)
time.sleep(2)
os.kill(os.getpid(), 9)
time.sleep(100)
CLOCK_MONOTONIC_RAW = 4 # see <linux/time.h>
class timespec(ctypes.Structure):
_fields_ = [
('tv_sec', ctypes.c_long),
('tv_nsec', ctypes.c_long),
]
librt = ctypes.CDLL('librt.so.1')
clock_gettime = librt.clock_gettime
clock_gettime.argtypes = [ctypes.c_int, ctypes.POINTER(timespec)]
def monotonic_time():
t = timespec()
clock_gettime(CLOCK_MONOTONIC_RAW , ctypes.pointer(t))
return t.tv_sec + t.tv_nsec * 1e-9
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",
))
@property
def display(self):
"returns the display configuration"
return json.loads(self._send_cmd(
"1.0", "*query/*display",
))
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
class Configuration(object):
def __init__(self):
self._restart = False
self._options = []
self._config = {}
self._parsed = {}
self.parse_node_json(do_update=False)
self.parse_config_json()
def restart_on_update(self):
log("going to restart when config is updated")
self._restart = True
def parse_node_json(self, do_update=True):
with open("node.json") as f:
self._options = json.load(f).get('options', [])
if do_update:
self.update_config()
def parse_config_json(self, do_update=True):
with open("config.json") as f:
self._config = json.load(f)
if do_update:
self.update_config()
def update_config(self):
if self._restart:
return abort_service("restart_on_update set")
def parse_recursive(options, config, target):
# print 'parsing', config
for option in options:
if not 'name' in option:
continue
if option['type'] == 'list':
items = []
for item in config[option['name']]:
parsed = {}
parse_recursive(option['items'], item, parsed)
items.append(parsed)
target[option['name']] = items
continue
target[option['name']] = types[option['type']](config[option['name']])
parsed = {}
parse_recursive(self._options, self._config, parsed)
log("updated config")
self._parsed = parsed
@property
def raw(self):
return self._config
@property
def metadata(self):
return self._config['__metadata']
def __getitem__(self, key):
return self._parsed[key]
def __getattr__(self, key):
return self._parsed[key]
def setup_inotify(configuration):
class EventHandler(pyinotify.ProcessEvent):
def process_default(self, event):
basename = os.path.basename(event.pathname)
if basename == 'node.json':
log("node.json changed")
configuration.parse_node_json()
elif basename == 'config.json':
log("config.json changed!")
configuration.parse_config_json()
elif basename.endswith('.py'):
abort_service("python file changed")
wm = pyinotify.WatchManager()
notifier = pyinotify.ThreadedNotifier(wm, EventHandler())
notifier.daemon = True
notifier.start()
wm.add_watch('.', pyinotify.IN_MOVED_TO)
class RPC(object):
def __init__(self, path, callbacks):
self._path = path
self._callbacks = callbacks
self._lock = threading.Lock()
self._con = None
thread = threading.Thread(target=self._listen_thread)
thread.daemon = True
thread.start()
def _get_connection(self):
if self._con is None:
try:
self._con = InfoBeamerQuery().node(
self._path + "/rpc/python"
).io(raw=True)
except InfoBeamerQueryException:
return None
return self._con
def _close_connection(self):
with self._lock:
if self._con:
try:
self._con.close()
except:
pass
self._con = None
def _send(self, line):
with self._lock:
con = self._get_connection()
if con is None:
return
try:
con.write(line + '\n')
con.flush()
return True
except:
self._close_connection()
return False
def _recv(self):
with self._lock:
con = self._get_connection()
try:
return con.readline()
except:
self._close_connection()
def _listen_thread(self):
while 1:
line = self._recv()
if not line:
self._close_connection()
time.sleep(0.5)
continue
try:
args = json.loads(line)
method = args.pop(0)
callback = self._callbacks.get(method)
if callback:
callback(*args)
else:
log("callback '%s' not found" % (method,))
except:
traceback.print_exc()
def register(self, name, fn):
self._callbacks[name] = fn
def call(self, fn):
self.register(fn.__name__, fn)
def __getattr__(self, method):
def call(*args):
args = list(args)
args.insert(0, method)
return self._send(json.dumps(
args,
ensure_ascii=False,
separators=(',',':'),
).encode('utf8'))
return call
class Cache(object):
def __init__(self, scope='default'):
self._touched = set()
self._prefix = 'cache-%s-' % scope
def key_to_fname(self, key):
return self._prefix + hashlib.md5(key).hexdigest()
def has(self, key, max_age=None):
try:
stat = os.stat(self.key_to_fname(key))
if max_age is not None:
now = time.time()
if now > stat.st_mtime + max_age:
return False
return True
except:
return False
def get(self, key, max_age=None):
try:
with open(self.file_ref(key)) as f:
if max_age is not None:
stat = os.fstat(f.fileno())
now = time.time()
if now > stat.st_mtime + max_age:
return None
return f.read()
except:
return None
def get_json(self, key, max_age=None):
data = self.get(key, max_age)
if data is None:
return None
return json.loads(data)
def set(self, key, value):
with open(self.file_ref(key), "wb") as f:
f.write(value)
def set_json(self, key, data):
self.set(key, json.dumps(data))
def file_ref(self, key):
fname = self.key_to_fname(key)
self._touched.add(fname)
return fname
def start(self):
self._touched = set()
def prune(self):
existing = set()
for fname in os.listdir("."):
if not fname.startswith(self._prefix):
continue
existing.add(fname)
prunable = existing - self._touched
for fname in prunable:
try:
log("pruning %s" % fname)
os.unlink(fname)
except:
pass
def clear(self):
self.start()
self.prune()
def call(self, max_age=None):
def deco(fn):
@wraps(fn)
def wrapper(*args, **kwargs):
key = marshal.dumps((fn.__name__, args, kwargs), 2)
cached = self.get(key, max_age)
if cached is not None:
return marshal.loads(cached)
val = fn(*args, **kwargs)
self.set(key, marshal.dumps(val, 2))
return val
return wrapper
return deco
def file_producer(self, max_age=None):
def deco(fn):
@wraps(fn)
def wrapper(*args, **kwargs):
key = marshal.dumps((fn.__name__, args, kwargs), 2)
if self.has(key, max_age):
return self.file_ref(key)
val = fn(*args, **kwargs)
if val is None:
return None
self.set(key, val)
return self.file_ref(key)
return wrapper
return deco
class Node(object):
def __init__(self, node):
self._node = node
self._sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
def send_raw(self, raw):
log("sending %r" % (raw,))
self._sock.sendto(raw, ('127.0.0.1', 4444))
def send(self, data):
self.send_raw(self._node + data)
def send_json(self, path, data):
self.send('%s:%s' % (path, json.dumps(
data,
ensure_ascii=False,
separators=(',',':'),
).encode('utf8')))
@property
def is_top_level(self):
return self._node == "root"
@property
def path(self):
return self._node
def write_file(self, filename, content):
f = NamedTemporaryFile(prefix='.hosted-py-tmp', dir=os.getcwd())
try:
f.write(content)
except:
traceback.print_exc()
f.close()
raise
else:
f.delete = False
f.close()
os.rename(f.name, filename)
def write_json(self, filename, data):
self.write_file(filename, json.dumps(
data,
ensure_ascii=False,
separators=(',',':'),
).encode('utf8'))
class Sender(object):
def __init__(self, node, path):
self._node = node
self._path = path
def __call__(self, data):
if isinstance(data, (dict, list)):
raw = "%s:%s" % (self._path, json.dumps(
data,
ensure_ascii=False,
separators=(',',':'),
).encode('utf8'))
else:
raw = "%s:%s" % (self._path, data)
self._node.send_raw(raw)
def __getitem__(self, path):
return self.Sender(self, self._node + path)
def __call__(self, data):
return self.Sender(self, self._node)(data)
def connect(self, suffix=""):
ib = InfoBeamerQuery()
return ib.node(self.path + suffix).io(raw=True)
def rpc(self, **callbacks):
return RPC(self.path, callbacks)
def cache(self, scope='default'):
return Cache(scope)
def scratch_cached(self, filename, generator):
cached = os.path.join(os.environ['SCRATCH'], filename)
if not os.path.exists(cached):
f = NamedTemporaryFile(prefix='scratch-cached-tmp', dir=os.environ['SCRATCH'])
try:
generator(f)
except:
raise
else:
f.delete = False
f.close()
os.rename(f.name, cached)
if os.path.exists(filename):
try:
os.unlink(filename)
except:
pass
os.symlink(cached, filename)
class APIError(Exception):
pass
class APIProxy(object):
def __init__(self, apis, api_name):
self._apis = apis
self._api_name = api_name
@property
def url(self):
index = self._apis.get_api_index()
if not self._api_name in index:
raise APIError("api '%s' not available" % (self._api_name,))
return index[self._api_name]['url']
def unwrap(self, r):
r.raise_for_status()
if r.status_code == 304:
return None
if r.headers['content-type'] == 'application/json':
resp = r.json()
if not resp['ok']:
raise APIError(u"api call failed: %s" % (
resp.get('error', '<unknown error>'),
))
return resp.get(self._api_name)
else:
return r.content
def add_default_args(self, kwargs):
if not 'timeout' in kwargs:
kwargs['timeout'] = 10
return kwargs
def get(self, **kwargs):
try:
return self.unwrap(self._apis.session.get(
url = self.url,
**self.add_default_args(kwargs)
))
except APIError:
raise
except Exception as err:
raise APIError(err)
def post(self, **kwargs):
try:
return self.unwrap(self._apis.session.post(
url = self.url,
**self.add_default_args(kwargs)
))
except APIError:
raise
except Exception as err:
raise APIError(err)
def delete(self, **kwargs):
try:
return self.unwrap(self._apis.session.delete(
url = self.url,
**self.add_default_args(kwargs)
))
except APIError:
raise
except Exception as err:
raise APIError(err)
class OnDeviceAPIs(object):
def __init__(self, config):
self._config = config
self._index = None
self._valid_until = 0
self._lock = threading.Lock()
self._session = requests.Session()
self._session.headers.update({
'User-Agent': 'hosted.py version/%s' % (VERSION,)
})
def update_apis(self):
log("fetching api index")
r = self._session.get(
url = self._config.metadata['api'],
timeout = 5,
)
r.raise_for_status()
resp = r.json()
if not resp['ok']:
raise APIError("cannot retrieve api index")
self._index = resp['apis']
self._valid_until = resp['valid_until'] - 300
def get_api_index(self):
with self._lock:
now = time.time()
if now > self._valid_until:
self.update_apis()
return self._index
@property
def session(self):
return self._session
def list(self):
try:
index = self.get_api_index()
return sorted(index.keys())
except Exception as err:
raise APIError(err)
def __getitem__(self, api_name):
return APIProxy(self, api_name)
def __getattr__(self, api_name):
return APIProxy(self, api_name)
class HostedAPI(object):
def __init__(self, api, on_device_token):
self._api = api
self._on_device_token = on_device_token
self._lock = threading.Lock()
self._next_refresh = 0
self._api_key = None
self._uses = 0
self._expire = 0
self._base_url = None
self._session = requests.Session()
self._session.headers.update({
'User-Agent': 'hosted.py version/%s - on-device' % (VERSION,)
})
def use_api_key(self):
with self._lock:
now = time.time()
self._uses -= 1
if self._uses <= 0:
log('hosted API adhoc key used up')
self._api_key = None
elif now > self._expire:
log('hosted API adhoc key expired')
self._api_key = None
else:
log('hosted API adhoc key usage: %d uses, %ds left' %(
self._uses, self._expire - now
))
if self._api_key is None:
if time.time() < self._next_refresh:
return None
log('refreshing hosted API adhoc key')
self._next_refresh = time.time() + 15
try:
r = self._api['api_key'].get(
params = dict(
on_device_token = self._on_device_token
),
timeout = 5,
)
except:
return None
self._api_key = r['api_key']
self._uses = r['uses']
self._expire = now + r['expire'] - 1
self._base_url = r['base_url']
return self._api_key
def add_default_args(self, kwargs):
if not 'timeout' in kwargs:
kwargs['timeout'] = 10
return kwargs
def ensure_api_key(self, kwargs):
api_key = self.use_api_key()
if api_key is None:
raise APIError('cannot retrieve API key')
kwargs['auth'] = ('', api_key)
def get(self, endpoint, **kwargs):
try:
self.ensure_api_key(kwargs)
r = self._session.get(
url = self._base_url + endpoint,
**self.add_default_args(kwargs)
)
r.raise_for_status()
return r.json()
except APIError:
raise
except Exception as err:
raise APIError(err)
def post(self, endpoint, **kwargs):
try:
self.ensure_api_key(kwargs)
r = self._session.post(
url = self._base_url + endpoint,
**self.add_default_args(kwargs)
)
r.raise_for_status()
return r.json()
except APIError:
raise
except Exception as err:
raise APIError(err)
def delete(self, endpoint, **kwargs):
try:
self.ensure_api_key(kwargs)
r = self._session.delete(
url = self._base_url + endpoint,
**self.add_default_args(kwargs)
)
r.raise_for_status()
return r.json()
except APIError:
raise
except Exception as err:
raise APIError(err)
class DeviceKV(object):
def __init__(self, api):
self._api = api
self._cache = {}
self._cache_complete = False
self._use_cache = True
def cache_enabled(self, enabled):
self._use_cache = enabled
self._cache = {}
self._cache_complete = False
def __setitem__(self, key, value):
if self._use_cache:
if key in self._cache and self._cache[key] == value:
return
self._api['kv'].post(
data = {
key: value
}
)
if self._use_cache:
self._cache[key] = value
def __getitem__(self, key):
if self._use_cache:
if key in self._cache:
return self._cache[key]
result = self._api['kv'].get(
params = dict(
keys = key,
),
timeout = 5,
)['v']
if key not in result:
raise KeyError(key)
value = result[key]
if self._use_cache:
self._cache[key] = value
return value
# http api cannot reliably determine if a key has
# been deleted, so __delitem__ always succeeds and
# does not throw KeyError for missing keys.
def __delitem__(self, key):
if self._use_cache and self._cache_complete:
if key not in self._cache:
return
self._api['kv'].delete(
params = dict(
keys = key,
),
timeout = 5,
)
if self._use_cache and key in self._cache:
if key in self._cache:
del self._cache[key]
def update(self, dct):
if self._use_cache:
for key, value in dct.items():
if key in self._cache and self._cache[key] == value:
dct.pop(key)
if not dct:
return
self._api['kv'].post(
data = dct
)
if self._use_cache:
for key, value in dct.iteritems():
self._cache[key] = value
def get(self, key, default=None):
try:
return self[key]
except KeyError:
return default
def items(self):
if self._use_cache and self._cache_complete:
return self._cache.items()
result = self._api['kv'].get(
timeout = 5,
)['v']
if self._use_cache:
for key, value in result.iteritems():
self._cache[key] = value
self._cache_complete = True
return result.items()
iteritems = items
def clear(self):
self._api['kv'].delete()
if self._use_cache:
self._cache = {}
self._cache_complete = False
class GPIO(object):
def __init__(self):
self._pin_fd = {}
self._state = {}
self._fd_2_pin = {}
self._poll = select.poll()
self._lock = threading.Lock()
def setup_pin(self, pin, direction="in", invert=False):
if not os.path.exists("/sys/class/gpio/gpio%d" % pin):
with open("/sys/class/gpio/export", "wb") as f:
f.write(str(pin))
# mdev is giving the newly create GPIO directory correct permissions.
for i in range(10):
try:
with open("/sys/class/gpio/gpio%d/active_low" % pin, "wb") as f:
f.write("1" if invert else "0")
break
except IOError as err:
if err.errno != errno.EACCES:
raise
time.sleep(0.1)
log("waiting for GPIO permissions")
else:
raise IOError(errno.EACCES, "Cannot access GPIO")
with open("/sys/class/gpio/gpio%d/direction" % pin, "wb") as f:
f.write(direction)
def set_pin_value(self, pin, high):
with open("/sys/class/gpio/gpio%d/value" % pin, "wb") as f:
f.write("1" if high else "0")
def monitor(self, pin, invert=False):
if pin in self._pin_fd:
return
self.setup_pin(pin, direction="in", invert=invert)
with open("/sys/class/gpio/gpio%d/edge" % pin, "wb") as f:
f.write("both")
fd = os.open("/sys/class/gpio/gpio%d/value" % pin, os.O_RDONLY)
self._state[pin] = bool(int(os.read(fd, 5)))
self._fd_2_pin[fd] = pin
self._pin_fd[pin] = fd
self._poll.register(fd, select.POLLPRI | select.POLLERR)
def poll(self, timeout=1000):
changes = []
for fd, evt in self._poll.poll(timeout):
os.lseek(fd, 0, 0)
state = bool(int(os.read(fd, 5)))
pin = self._fd_2_pin[fd]
with self._lock:
prev_state, self._state[pin] = self._state[pin], state
if state != prev_state:
changes.append((pin, state))
return changes
def poll_forever(self):
while 1:
for event in self.poll():
yield event
def on(self, pin):
with self._lock:
return self._state.get(pin, False)
class SyncerAPI(object):
def __init__(self):
self._session = requests.Session()
def unwrap(self, r):
r.raise_for_status()
return r.json()
def get(self, path, params={}):
return self.unwrap(self._session.get(
'http://127.0.0.1:81%s' % path,
params=params, timeout=10
))
def post(self, path, data={}):
return self.unwrap(self._session.post(
'http://127.0.0.1:81%s' % path,
data=data, timeout=10
))
class ProofOfPlay(object):
def __init__(self, api, dirname):
self._api = api
self._prefix = os.path.join(os.environ['SCRATCH'], dirname)
try:
os.makedirs(self._prefix)
except:
pass
pop_info = self._api.pop.get()
self._max_delay = pop_info['max_delay']
self._max_lines = pop_info['max_lines']
self._submission_min_delay = pop_info['submission']['min_delay']
self._submission_error_delay = pop_info['submission']['error_delay']
self._q = Queue.Queue()
self._log = None
thread = threading.Thread(target=self._submit_thread)
thread.daemon = True
thread.start()
thread = threading.Thread(target=self._writer_thread)
thread.daemon = True
thread.start()
def _submit(self, fname, queue_size):
with open(fname, 'rb') as f:
return self._api.pop.post(
timeout = 10,
data = {
'queue_size': queue_size,
},
files={
'pop-v1': f,
}
)
def _submit_thread(self):
time.sleep(3)
while 1:
delay = self._submission_min_delay
try:
log('[pop][submit] gathering files')
files = [
fname for fname
in os.listdir(self._prefix)
if fname.startswith('submit-')
]
log('[pop][submit] %d files' % len(files))
for fname in files:
fullname = os.path.join(self._prefix, fname)
if os.stat(fullname).st_size == 0:
os.unlink(fullname)
continue
try:
log('[pop][submit] submitting %s' % fullname)
status = self._submit(fullname, len(files))
if status['disabled']:
log('[pop][submit] WARNING: Proof of Play disabled for this device. Submission discarded')
else:
log('[pop][submit] success')
except APIError as err:
log('[pop][submit] failure to submit log %s: %s' % (
fullname, err
))
delay = self._submission_error_delay
break
os.unlink(fullname)
break
if not files:
delay = 10
except Exception as err:
log('[pop][submit] error: %s' % err)
log('[pop][submit] sleeping %ds' % delay)
time.sleep(delay)
def reopen_log(self):
log_name = os.path.join(self._prefix, 'current.log')
if self._log is not None:
self._log.close()
self._log = None
if os.path.exists(log_name):
os.rename(log_name, os.path.join(
self._prefix, 'submit-%s.log' % os.urandom(16).encode('hex')
))
self._log = open(log_name, 'wb')
return self._log
def _writer_thread(self):
submit, log_file, lines = monotonic_time() + self._max_delay, self.reopen_log(), 0
while 1:
reopen = False
max_wait = max(0.1, submit - monotonic_time())
log('[pop] got %d lines. waiting %ds for more log lines' % (lines, max_wait))
try:
line = self._q.get(block=True, timeout=max_wait)
log_file.write(line + '\n')
log_file.flush()
os.fsync(log_file.fileno())
lines += 1
log('[pop] line added: %r' % line)
except Queue.Empty:
if lines == 0:
submit += self._max_delay # extend deadline
else:
reopen = True
except Exception as err:
log("[pop] error writing pop log line")
if lines >= self._max_lines:
reopen = True
if reopen:
log('[pop] closing log of %d lines' % lines)
submit, log_file, lines = monotonic_time() + self._max_delay, self.reopen_log(), 0
def log(self, play_start, duration, asset_id, asset_filename):
uuid = "%08x%s" % (
time.time(), os.urandom(12).encode('hex')
)
self._q.put(json.dumps([
uuid,
play_start,
duration,
0 if asset_id is None else asset_id,
asset_filename,
],
ensure_ascii = False,
separators = (',',':'),
).encode('utf8'))
class Device(object):
def __init__(self, kv, api):
self._socket = None
self._gpio = GPIO()
self._kv = kv
self._api = api
@property
def kv(self):
return self._kv
@property
def gpio(self):
return self._gpio
@property
def serial(self):
return os.environ['SERIAL']
@property
def screen_resolution(self):
with open("/sys/class/graphics/fb0/virtual_size", "rb") as f:
return [int(val) for val in f.read().strip().split(',')]
@property
def screen_w(self):
return self.screen_resolution[0]
@property
def screen_h(self):
return self.screen_resolution[1]
@property
def syncer_api(self):
return SyncerAPI()
def ensure_connected(self):
if self._socket:
return True
try:
log("establishing upstream connection")
self._socket = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
self._socket.connect(os.getenv('SYNCER_SOCKET', "/tmp/syncer"))
return True
except Exception as err:
log("cannot connect to upstream socket: %s" % (err,))
return False
def send_raw(self, raw):
try:
if self.ensure_connected():
self._socket.send(raw + '\n')
except Exception as err:
log("cannot send to upstream: %s" % (err,))
if self._socket:
self._socket.close()
self._socket = None
def send_upstream(self, **data):
self.send_raw(json.dumps(data))
def turn_screen_off(self):
self.send_raw("tv off")
def turn_screen_on(self):
self.send_raw("tv on")
def screen(self, on=True):
if on:
self.turn_screen_on()
else:
self.turn_screen_off()
def reboot(self):
self.send_raw("system reboot")
def halt_until_powercycled(self):
self.send_raw("system halt")
def restart_infobeamer(self):
self.send_raw("infobeamer restart")
def verify_cache(self):
self.send_raw("syncer verify_cache")
def pop(self, dirname='pop'):
return ProofOfPlay(self._api, dirname)
def hosted_api(self, on_device_token):
return HostedAPI(self._api, on_device_token)
if __name__ == "__main__":
print("nothing to do here")
sys.exit(1)
else:
log("starting version %s" % (VERSION,))
node = NODE = Node(os.environ['NODE'])
config = CONFIG = Configuration()
api = API = OnDeviceAPIs(CONFIG)
device = DEVICE = Device(
kv = DeviceKV(api),
api = api,
)
setup_inotify(CONFIG)
log("ready to go!")
Reference in a new issue Copy permalink