def main():
# Silence the warning from Interest wire encode.
Interest.setDefaultCanBePrefix(True)
loop = asyncio.get_event_loop()
face = ThreadsafeFace(loop, "memoria.ndn.ucla.edu")
# Counter will stop the ioService after callbacks for all expressInterest.
counter = Counter(loop, 3)
# Try to fetch anything.
name1 = Name("/")
dump("Express name ", name1.toUri())
# These call to exressIinterest is thread safe because face is a ThreadsafeFace.
face.expressInterest(name1, counter.onData, counter.onTimeout)
# Try to fetch using a known name.
name2 = Name("/ndn/edu/ucla/remap/demo/ndn-js-test/hello.txt/%FDU%8D%9DM")
dump("Express name ", name2.toUri())
face.expressInterest(name2, counter.onData, counter.onTimeout)
# Expect this to time out.
name3 = Name("/test/timeout")
dump("Express name ", name3.toUri())
face.expressInterest(name3, counter.onData, counter.onTimeout)
# Run until the Counter calls stop().
loop.run_forever()
face.shutdown()
def main():
loop = asyncio.get_event_loop()
# Connect to the demo host at memoria.ndn.ucla.edu .
face = ThreadsafeFace(loop, "128.97.98.8")
# Counter will stop the ioService after callbacks for all expressInterest.
counter = Counter(loop, 3)
# Try to fetch anything.
name1 = Name("/")
dump("Express name ", name1.toUri())
# These call to exressIinterest is thread safe because face is a ThreadsafeFace.
face.expressInterest(name1, counter.onData, counter.onTimeout)
# Try to fetch using a known name.
name2 = Name("/ndn/edu/ucla/remap/demo/ndn-js-test/hello.txt/%FDX%DC5%1F")
dump("Express name ", name2.toUri())
face.expressInterest(name2, counter.onData, counter.onTimeout)
# Expect this to time out.
name3 = Name("/test/timeout")
dump("Express name ", name3.toUri())
face.expressInterest(name3, counter.onData, counter.onTimeout)
# Run until the Counter calls stop().
loop.run_forever()
face.shutdown()
def main():
# Params parsing
parser = argparse.ArgumentParser(
description=
'bms gateway node to Parse or follow Cascade Datahub log and publish to MiniNdn.'
)
parser.add_argument('filename', help='datahub log file')
parser.add_argument('-f',
dest='follow',
action='store_true',
help='follow (tail -f) the log file')
parser.add_argument('--namespace',
default='/ndn/nist/bms',
help='root of ndn name, no trailing slash')
parser.add_argument('--image',
dest='image',
default='../simulator/res/floor2.jpg',
help='the floor plan to publish')
parser.add_argument('--location',
dest='location',
default='../simulator/res/locations.txt',
help='the floor plan to publish')
args = parser.parse_args()
# Setup logging
logger = Logger()
logger.prepareLogging()
# Face, KeyChain, memoryContentCache and asio event loop initialization
loop = asyncio.get_event_loop()
face = ThreadsafeFace(loop)
keyChain = KeyChain(IdentityManager(BasicIdentityStorage()))
# For the gateway publisher, we create one identity for it to sign nfd command interests
certificateName = keyChain.createIdentityAndCertificate(
Name("/ndn/nist/gateway"))
face.setCommandSigningInfo(keyChain, certificateName)
cache = MemoryContentCache(face)
dataPublisher = DataPublisher(face, keyChain, loop, cache, args.namespace,
args.image, args.location)
cache.registerPrefix(Name(args.namespace), dataPublisher.onRegisterFailed,
dataPublisher.onDataNotFound)
loop.run_until_complete(dataPublisher.publishFloorImage())
if args.follow:
#asyncio.async(loop.run_in_executor(executor, followfile, args.filename, args.namespace, cache))
loop.run_until_complete(dataPublisher.followfile(args.filename))
else:
loop.run_until_complete(dataPublisher.readfile(args.filename))
loop.run_forever()
face.shutdown()
def main():
# Params parsing
parser = argparse.ArgumentParser(
description=
'bms gateway node to Parse or follow Cascade Datahub log and publish to MiniNdn.'
)
parser.add_argument('filename', help='datahub log file')
parser.add_argument('-f',
dest='follow',
action='store_true',
help='follow (tail -f) the log file')
parser.add_argument('--namespace',
default='/ndn/edu/ucla/remap/bms',
help='root of ndn name, no trailing slash')
args = parser.parse_args()
# Setup logging
logger = Logger()
logger.prepareLogging()
# Face, KeyChain, memoryContentCache and asio event loop initialization
loop = asyncio.get_event_loop()
face = ThreadsafeFace(loop, "128.97.98.7")
keyChain = KeyChain(
IdentityManager(BasicIdentityStorage(), FilePrivateKeyStorage()))
# For the gateway publisher, we create one identity for it to sign nfd command interests
#certificateName = keyChain.createIdentityAndCertificate(Name("/ndn/bms/gateway-publisher"))
face.setCommandSigningInfo(keyChain, keyChain.getDefaultCertificateName())
print "Using certificate name " + keyChain.getDefaultCertificateName(
).toUri()
cache = MemoryContentCache(face)
dataPublisher = DataPublisher(face, keyChain, loop, cache, args.namespace)
cache.registerPrefix(Name(args.namespace), dataPublisher.onRegisterFailed,
dataPublisher.onDataNotFound)
# Parse csv to decide the mapping between sensor JSON -> <NDN name, data type>
dataPublisher.populateSensorNDNDictFromCSV(
'bms-sensor-data-types-sanitized.csv')
loop.call_later(dataPublisher._restartInterval, dataPublisher.checkAlive)
if args.follow:
#asyncio.async(loop.run_in_executor(executor, followfile, args.filename, args.namespace, cache))
loop.run_until_complete(dataPublisher.followfile(args.filename))
else:
loop.run_until_complete(dataPublisher.readfile(args.filename))
loop.run_forever()
face.shutdown()
class NdnClient:
def __init__(self,localhub_ip):
self.loop = asyncio.get_event_loop()
self.face = ThreadsafeFace(self.loop, localhub_ip)
def request(self,req,callback,content= None, mustbefresh= False):
baseName = ndn.Name(req)
interest = ndn.Interest(ndn.Name(baseName))
interest.setMustBeFresh(mustbefresh)
self.callback = callback
if content != None:
interest.setContent(content)
self.face.expressInterest(interest, self._onData, self._onTimeout)
self.loop.run_forever()
def _onData(self, interest, data):
self.callback(data.content)
self.loop.stop()
def destroy(self):
self.face.shutdown()
def _onTimeout(self, interest):
print >> "request timeout">> interest.name.toUri()
def _onInterest(self, prefix, interest, *k):
print >> sys.stderr, "<< PyNDN %s" % interest.name
content = "PyNDN LINE #%d\n" % self.counter
self.counter += 1
data = ndn.Data(interest.getName())
meta = ndn.MetaInfo()
meta.setFreshnessPeriod(5000)
data.setMetaInfo(meta)
data.setContent(content)
self.keyChain.sign(data, self.keyChain.getDefaultCertificateName())
self.face.putData(data)
def _onRegisterFailed(self, prefix):
print >> sys.stderr, "<< PyNDN: failed to register prefix"
if __name__ == '__main__':
loop = asyncio.get_event_loop()
face = ThreadsafeFace(loop, None)
server = Server(face)
loop.run_forever()
face.shutdown()
class Flask():
def __init__(self, host):
self.__name__ = __name__
self.keyChain = KeyChain()
self.isDone = False
self.counter = 0
loop = asyncio.get_event_loop()
self.face = ThreadsafeFace(loop, host)
self.a = {}
self.methods = {}
def route(self, uri, methods):
prefix = uri
if bool(re.search('<(.*)>', prefix)):
self.baseName = ndn.Name(
re.sub('<(.*)>', methods[0] + '/<data>', prefix))
else:
self.baseName = ndn.Name(prefix + "/" + methods[0])
self.methods[self.baseName.toUri()] = methods[0]
return self.dec
def onInterest(self, prefix, interest, *k):
print >> sys.stderr, "<< PyNDN %s" % interest.name
intrestUri = interest.name.toUri()
prefixUri = prefix.toUri()
parameters = ''
if intrestUri != prefixUri:
parameters = intrestUri[len(prefixUri) + 1:]
print
prefixUri += "/%3Cdata%3E"
d = self.a[prefixUri]
if self.methods[prefixUri] == "POST":
content = json.dumps(
d(interest.getContent().toRawStr().decode('string_escape')))
else:
if parameters:
content = json.dumps(d(parameters))
else:
content = json.dumps(d())
self.counter += 1
data = ndn.Data(interest.getName())
meta = ndn.MetaInfo()
meta.setFreshnessPeriod(5000)
data.setMetaInfo(meta)
data.setContent(content)
self.keyChain.sign(data, self.keyChain.getDefaultCertificateName())
self.face.putData(data)
def _onRegisterFailed(self, prefix):
print >> sys.stderr, "<< PyNDN: failed to register prefix"
def run(self):
root = logging.getLogger()
root.setLevel(logging.DEBUG)
ch = logging.StreamHandler(sys.stdout)
ch.setLevel(logging.DEBUG)
formatter = logging.Formatter(
'%(asctime)s - %(name)s - %(levelname)s - %(message)s')
ch.setFormatter(formatter)
root.addHandler(ch)
loop = asyncio.get_event_loop()
server = Server(self.face)
loop.run_forever()
self.face.shutdown()
def dec(self, func):
self.a[self.baseName.toUri()] = func
self.face.registerPrefix(
self.baseName,
self.onInterest,
self._onRegisterFailed,
)
