def main():
# Silence the warning from Interest wire encode.
Interest.setDefaultCanBePrefix(True)
# The default Face will connect using a Unix socket, or to "localhost".
face = Face()
prefix = Namespace("/ndn/test/status")
prefix.setFace(face)
enabled = [True]
# This is called to print the content after it is re-assembled from segments.
def onGeneralizedObject(contentMetaInfo, objectNamespace):
dump("Got generalized object", objectNamespace.name, ", content-type",
contentMetaInfo.contentType, ":", str(objectNamespace.obj))
enabled[0] = False
handler = GeneralizedObjectHandler(prefix, onGeneralizedObject)
# Allow one component after the prefix for the <version>.
handler.setNComponentsAfterObjectNamespace(1)
# In objectNeeded, set mustBeFresh == true so we avoid expired cached data.
prefix.objectNeeded(True)
# Loop calling processEvents until a callback sets enabled[0] = False.
while enabled[0]:
face.processEvents()
# We need to sleep for a few milliseconds so we don't use 100% of the CPU.
time.sleep(0.01)
def main():
# The default Face will connect using a Unix socket, or to "localhost".
face = Face()
# Use the system default key chain and certificate name to sign.
keyChain = KeyChain()
face.setCommandSigningInfo(keyChain, keyChain.getDefaultCertificateName())
objectPrefix = Namespace("/ndn/eb/run/28/description", keyChain)
dump("Register prefix", objectPrefix.name)
# Set the face and register to receive Interests.
objectPrefix.setFace(
face,
lambda prefixName: dump("Register failed for prefix", prefixName))
dump("Preparing data for", objectPrefix.name)
GeneralizedObjectHandler().setObject(objectPrefix,
Blob("EB run #28. Ham and oats"),
"text/html")
while True:
face.processEvents()
# We need to sleep for a few milliseconds so we don't use 100% of the CPU.
time.sleep(0.01)
def main():
# The default Face will connect using a Unix socket, or to "localhost".
face = Face()
prefix = Name("/icear-server/result/example-data/2/deeplab")
prefixNamespace = Namespace(prefix)
prefixNamespace.setFace(face)
enabled = [True]
img = [None]
def onGeneralizedObject(contentMetaInfo, obj):
data = obj.toBytes()
dump("Got generalized object, content-type",
contentMetaInfo.getContentType(), ":", repr(data))
print(len(data))
enabled[0] = False
img[0] = data
goh = GeneralizedObjectHandler(onGeneralizedObject)
prefixNamespace.setHandler(goh).objectNeeded()
# Loop calling processEvents until a callback sets enabled[0] = False.
while enabled[0]:
face.processEvents()
# We need to sleep for a few milliseconds so we don't use 100% of the CPU.
time.sleep(0.01)
image = Image.open(io.BytesIO(img[0]))
image.show()
def main(args):
face = Face()
prefix = Namespace(args['<prefix>'])
prefix.setFace(face)
enabled = [True]
# This is called to print the content after it is re-assembled from segments.
def onGeneralizedObject(contentMetaInfo, objectNamespace):
if args['--verbose']:
print(objectNamespace.getName())
print(str(objectNamespace.obj))
enabled[0] = False
handler = GeneralizedObjectHandler(onGeneralizedObject)
handler.setNComponentsAfterObjectNamespace(1)
prefix.setHandler(handler).objectNeeded(True)
# Loop calling processEvents until a callback sets enabled[0] = False.
while enabled[0]:
face.processEvents()
# We need to sleep for a few milliseconds so we don't use 100% of the CPU.
time.sleep(0.01)
def fetch_data(self, prefix, start_frame, end_frame):
# type: (Name, int, int) -> None
for frame_id in range(start_frame, end_frame + 1):
name = Name(prefix).append(str(frame_id))
# Feed server with existing data
if self.storage.exists(name):
self.on_payload(name)
# Fetching new data
logging.info("Fetching: %s", name.toUri())
# TODO: Namespace will put everything into memory
frame_namespace = Namespace(name)
frame_namespace.setFace(self.face)
frame_namespace.setHandler(
GeneralizedObjectHandler(partial(self.on_generalized_obj,
name))).objectNeeded()
def main():
# The default Face will connect using a Unix socket, or to "localhost".
face = Face()
# Use the system default key chain and certificate name to sign.
keyChain = KeyChain()
face.setCommandSigningInfo(keyChain, keyChain.getDefaultCertificateName())
prefix = Namespace("/ndn/test/status", keyChain)
dump("Register prefix", prefix.name)
# Set the face and register to receive Interests.
prefix.setFace(face,
lambda prefixName: dump("Register failed for prefix", prefixName))
handler = GeneralizedObjectHandler()
# Each generalized object will have a 1000 millisecond freshness period.
metaInfo = MetaInfo()
metaInfo.setFreshnessPeriod(1000.0)
# This is called when the library receives an Interest which is not
# satisfied by Data already in the Namespace tree.
def onObjectNeeded(namespace, neededNamespace, callbackId):
if not (neededNamespace is prefix):
# This is not the expected Namespace.
return False
# Make a version from the current time.
versionNamespace = prefix[
Name.Component.fromVersion(Common.getNowMilliseconds())]
# The metaInfo has the freshness period.
versionNamespace.setNewDataMetaInfo(metaInfo)
dump("Producing the generalized object for", versionNamespace.name)
handler.setObject(
versionNamespace, Blob("Status as of " + str(datetime.datetime.now())),
"text/html")
return True
prefix.addOnObjectNeeded(onObjectNeeded)
while True:
face.processEvents()
# We need to sleep for a few milliseconds so we don't use 100% of the CPU.
time.sleep(0.01)
def main(args):
face = Face()
keyChain = KeyChain()
face.setCommandSigningInfo(keyChain, keyChain.getDefaultCertificateName())
gobj = Namespace(args['<prefix>'], keyChain)
gobj.setFace(
face,
lambda prefixName: dump("Register failed for prefix", prefixName))
handler = GeneralizedObjectHandler()
metaInfo = MetaInfo()
if args['--freshness']:
metaInfo.setFreshnessPeriod(float(args['--freshness']))
else:
metaInfo.setFreshnessPeriod(1000.0)
def onObjectNeeded(namespace, neededNamespace, callbackId):
if not (neededNamespace is gobj):
# This is not the expected Namespace.
return False
# Make a version from the current time.
versionNamespace = gobj[Name.Component.fromVersion(
Common.getNowMilliseconds())]
# The metaInfo has the freshness period.
versionNamespace.setNewDataMetaInfo(metaInfo)
with open(args['<file>'], 'r') as f:
handler.setObject(versionNamespace, Blob(f.read()), "text/html")
return True
gobj.addOnObjectNeeded(onObjectNeeded)
while True:
face.processEvents()
time.sleep(0.01)
def main():
# Silence the warning from Interest wire encode.
Interest.setDefaultCanBePrefix(True)
# The default Face will connect using a Unix socket, or to "localhost".
face = Face()
objectPrefix = Namespace("/ndn/eb/run/28/description")
objectPrefix.setFace(face)
enabled = [True]
def onGeneralizedObject(contentMetaInfo, objectNamespace):
dump("Got generalized object, content-type",
contentMetaInfo.contentType, ":", str(objectNamespace.obj))
enabled[0] = False
GeneralizedObjectHandler(objectPrefix, onGeneralizedObject).objectNeeded()
# Loop calling processEvents until a callback sets enabled[0] = False.
while enabled[0]:
face.processEvents()
# We need to sleep for a few milliseconds so we don't use 100% of the CPU.
time.sleep(0.01)