def _decode(rawstr):
"""Convert a raw string to a Message.
"""
# Check for the magick word.
try:
rawstr = rawstr.decode('utf-8')
except (AttributeError, UnicodeEncodeError):
pass
except (UnicodeDecodeError):
try:
rawstr = rawstr.decode('iso-8859-1')
except (UnicodeDecodeError):
rawstr = rawstr.decode('utf-8', 'ignore')
if not rawstr.startswith(_MAGICK):
raise MessageError("This is not a '%s' message (wrong magick word)"
% _MAGICK)
rawstr = rawstr[len(_MAGICK):]
# Check for element count and version
raw = re.split(r"\s+", rawstr, maxsplit=6)
if len(raw) < 5:
raise MessageError("Could node decode raw string: '%s ...'"
% str(rawstr[:36]))
version = raw[4][:len(_VERSION)]
if not _is_valid_version(version):
raise MessageError("Invalid Message version: '%s'" % str(version))
# Start to build message
msg = dict((('subject', raw[0].strip()),
('type', raw[1].strip()),
('sender', raw[2].strip()),
('time', strp_isoformat(raw[3].strip())),
('version', version)))
# Data part
try:
mimetype = raw[5].lower()
data = raw[6]
except IndexError:
mimetype = None
if mimetype is None:
msg['data'] = ''
msg['binary'] = False
elif mimetype == 'application/json':
try:
msg['data'] = json.loads(raw[6], object_hook=datetime_decoder)
msg['binary'] = False
except ValueError:
raise MessageError("JSON decode failed on '%s ...'" % raw[6][:36])
elif mimetype == 'text/ascii':
msg['data'] = str(data)
msg['binary'] = False
elif mimetype == 'binary/octet-stream':
msg['data'] = data
msg['binary'] = True
else:
raise MessageError("Unknown mime-type '%s'" % mimetype)
return msg
def run(self):
last_hb = datetime.now()
minutes = 2
while self._loop:
if datetime.now() - last_hb > timedelta(minutes=minutes):
logger.error("No heartbeat from " + str(self._pubaddress))
last_hb = datetime.now()
minutes = 1440
socks = dict(self._poller.poll(2000))
if (socks and self._subsocket in socks
and socks[self._subsocket] == POLLIN):
message = Message.decode(self._subsocket.recv())
else:
continue
if message.type == "have":
sat = message.data["satellite"]
key = strp_isoformat(message.data["timecode"])
elevation = message.data["elevation"]
quality = message.data.get("quality", 100)
data = _MirrorGetter(self._req, sat, key)
self._holder.add(sat, key, elevation, quality, data)
if message.type == "heartbeat":
logger.debug("Got heartbeat from " + str(self._pubaddress) +
": " + str(message))
self._sched.mirror_next_pass = message.data["next_pass"]
last_hb = datetime.now()
minutes = 2
def run(self):
last_hb = datetime.now()
minutes = 2
while self._loop:
if datetime.now() - last_hb > timedelta(minutes=minutes):
logger.error("No heartbeat from " + str(self._pubaddress))
last_hb = datetime.now()
minutes = 1440
socks = dict(self._poller.poll(2000))
if (socks and
self._subsocket in socks and
socks[self._subsocket] == POLLIN):
message = Message.decode(self._subsocket.recv())
else:
continue
if message.type == "have":
sat = message.data["satellite"]
key = strp_isoformat(message.data["timecode"])
elevation = message.data["elevation"]
quality = message.data.get("quality", 100)
data = _MirrorGetter(self._req, sat, key)
self._holder.add(sat, key, elevation, quality, data)
if message.type == "heartbeat":
logger.debug("Got heartbeat from " + str(self._pubaddress)
+ ": " + str(message))
self._sched.mirror_next_pass = message.data["next_pass"]
last_hb = datetime.now()
minutes = 2
def run(self):
for message in self._sub.recv(1):
if message is None:
continue
if (message.type == "have"):
logger.debug("Relaying " + str(message.data["timecode"]))
self.scanlines.add_scanline(
message.data["satellite"],
strp_isoformat(message.data["timecode"]),
message.data["elevation"], None, self._reqaddr)
def scanline(self, message):
"""Reply to scanline request
"""
sat = message.data["satellite"]
key = strp_isoformat(message.data["utctime"])
try:
data = self._holder.get_data(sat, key)
except KeyError:
resp = Message(subject, "missing")
else:
resp = Message(subject, "scanline", data, binary=True)
return resp
def run(self):
for message in self._sub.recv(1):
if message is None:
continue
if(message.type == "have"):
logger.debug("Relaying " + str(message.data["timecode"]))
self.scanlines.add_scanline(message.data["satellite"],
strp_isoformat(message.data["timecode"]),
message.data["elevation"],
None,
self._reqaddr)
def scanline(self, message):
"""Reply to scanline request
"""
sat = message.data["satellite"]
key = strp_isoformat(message.data["utctime"])
try:
data = self._holder.get_data(sat, key)
except KeyError:
resp = Message(subject, "missing")
else:
resp = Message(subject, "scanline", data, binary=True)
return resp
def datetime_decoder(dct):
"""Decode datetimes to python objects.
"""
if isinstance(dct, list):
pairs = enumerate(dct)
elif isinstance(dct, dict):
pairs = dct.items()
result = []
for key, val in pairs:
if isinstance(val, six.string_types):
try:
val = strp_isoformat(val)
except ValueError:
pass
elif isinstance(val, (dict, list)):
val = datetime_decoder(val)
result.append((key, val))
if isinstance(dct, list):
return [x[1] for x in result]
elif isinstance(dct, dict):
return dict(result)
def run(self):
poller = Poller()
poller.register(self._socket, POLLIN)
while self._loop:
socks = dict(poller.poll(timeout=2000))
if self._socket in socks and socks[self._socket] == POLLIN:
message = Message(rawstr=self._socket.recv(NOBLOCK))
logger.debug("Request: " + str(message))
# send list of scanlines
if (message.type == "request"
and message.data["type"] == "scanlines"):
sat = message.data["satellite"]
epoch = "1950-01-01T00:00:00"
start_time = strp_isoformat(
message.data.get("start_time", epoch))
end_time = strp_isoformat(
message.data.get("end_time", epoch))
resp = Message(
'/oper/polar/direct_readout/' + self._station,
"scanlines",
[(utctime.isoformat(), self._holder[sat][utctime][2])
for utctime in self._holder.get(sat, [])
if utctime >= start_time and utctime <= end_time])
self._socket.send(str(resp))
# send one scanline
elif (message.type == "request"
and message.data["type"] == "scanline"):
sat = message.data["satellite"]
utctime = strp_isoformat(message.data["utctime"])
try:
url = urlparse(self._holder[sat][utctime][1])
except KeyError:
resp = Message(
'/oper/polar/direct_readout/' + self._station,
"missing")
else:
if url.scheme in ["",
"file"]: # data is locally stored.
resp = Message(
'/oper/polar/direct_readout/' + self._station,
"scanline",
self._holder.get_scanline(sat, utctime),
binary=True)
else: # it's the address of a remote server.
resp = self.forward_request(
urlunparse(url), message)
self._socket.send(str(resp))
# take in a new scanline
elif (message.type == "notice"
and message.data["type"] == "scanline"):
sat = message.data["satellite"]
utctime = message.data["utctime"]
elevation = message.data["elevation"]
filename = message.data["filename"]
line_start = message.data["file_position"]
utctime = strp_isoformat(utctime)
self._holder.add_scanline(sat, utctime, elevation,
line_start, filename)
resp = Message(
'/oper/polar/direct_readout/' + self._station,
"notice", "ack")
self._socket.send(str(resp))
elif (message.type == "ping"):
resp = Message(
'/oper/polar/direct_readout/' + self._station, "pong",
{"station": self._station})
self._socket.send(str(resp))
if resp.binary:
logger.debug("Response: " +
" ".join(str(resp).split()[:6]))
else:
logger.debug("Response: " + str(resp))
def run(self):
poller = Poller()
poller.register(self._socket, POLLIN)
while self._loop:
socks = dict(poller.poll(timeout=2000))
if self._socket in socks and socks[self._socket] == POLLIN:
message = Message(rawstr=self._socket.recv(NOBLOCK))
logger.debug("Request: " + str(message))
# send list of scanlines
if(message.type == "request" and
message.data["type"] == "scanlines"):
sat = message.data["satellite"]
epoch = "1950-01-01T00:00:00"
start_time = strp_isoformat(message.data.get("start_time",
epoch))
end_time = strp_isoformat(message.data.get("end_time",
epoch))
resp = Message('/oper/polar/direct_readout/' + self._station,
"scanlines",
[(utctime.isoformat(),
self._holder[sat][utctime][2])
for utctime in self._holder.get(sat, [])
if utctime >= start_time
and utctime <= end_time])
self._socket.send(str(resp))
# send one scanline
elif(message.type == "request" and
message.data["type"] == "scanline"):
sat = message.data["satellite"]
utctime = strp_isoformat(message.data["utctime"])
try:
url = urlparse(self._holder[sat][utctime][1])
except KeyError:
resp = Message('/oper/polar/direct_readout/'
+ self._station,
"missing")
else:
if url.scheme in ["", "file"]: # data is locally stored.
resp = Message('/oper/polar/direct_readout/'
+ self._station,
"scanline",
self._holder.get_scanline(sat, utctime),
binary=True)
else: # it's the address of a remote server.
resp = self.forward_request(urlunparse(url),
message)
self._socket.send(str(resp))
# take in a new scanline
elif(message.type == "notice" and
message.data["type"] == "scanline"):
sat = message.data["satellite"]
utctime = message.data["utctime"]
elevation = message.data["elevation"]
filename = message.data["filename"]
line_start = message.data["file_position"]
utctime = strp_isoformat(utctime)
self._holder.add_scanline(sat, utctime, elevation,
line_start, filename)
resp = Message('/oper/polar/direct_readout/'
+ self._station,
"notice",
"ack")
self._socket.send(str(resp))
elif(message.type == "ping"):
resp = Message('/oper/polar/direct_readout/'
+ self._station,
"pong",
{"station": self._station})
self._socket.send(str(resp))
if resp.binary:
logger.debug("Response: " + " ".join(str(resp).split()[:6]))
else:
logger.debug("Response: " + str(resp))
