def main():
# Uncomment these lines to print ChronoSync debug messages.
# logging.getLogger('').addHandler(logging.StreamHandler(sys.stdout))
# logging.getLogger('').setLevel(logging.INFO)
defaultUserPrefix = "com/newspaper/USER/bob"
userPrefix = promptAndInput("Enter user prefix: [" + defaultUserPrefix + "]")
if userPrefix == "":
userPrefix = defaultUserPrefix
defaultNamespacePrefix = "/ndn/hackathon/cnl-demo/slides" #"com/newspaper"
namespacePrefix = promptAndInput("Enter namespace prefix [" + defaultNamespacePrefix + "]: ")
if namespacePrefix == "":
namespacePrefix = defaultNamespacePrefix
host = "localhost" #"memoria.ndn.ucla.edu"
print("Connecting to " + host)
print("")
# Set up the key chain.
face = Face(host)
identityStorage = MemoryIdentityStorage()
privateKeyStorage = MemoryPrivateKeyStorage()
keyChain = KeyChain(IdentityManager(identityStorage, privateKeyStorage),
NoVerifyPolicyManager())
keyChain.setFace(face)
keyName = Name("/testname/DSK-123")
certificateName = keyName.getSubName(0, keyName.size() - 1).append(
"KEY").append(keyName[-1]).append("ID-CERT").append("0")
identityStorage.addKey(keyName, KeyType.RSA, Blob(DEFAULT_RSA_PUBLIC_KEY_DER))
privateKeyStorage.setKeyPairForKeyName(
keyName, KeyType.RSA, DEFAULT_RSA_PUBLIC_KEY_DER, DEFAULT_RSA_PRIVATE_KEY_DER)
face.setCommandSigningInfo(keyChain, certificateName)
newspaper = Namespace(namespacePrefix)
def onContentSet(namespace, contentNamespace, callbackId):
global currentSlideName
if contentNamespace == namespace:
print("content size "+str(contentNamespace.content.size()))
currentSlideName = contentNamespace.getName()
displayImage(contentNamespace.content.toRawStr(), contentNamespace.getName().toUri())
# dump("Got segmented content ", contentNamespace.content.toRawStr())
def onNewName(namespace, addedNamespace, callbackId):
print("namespace ("+addedNamespace.getName().toUri()+") added to "+namespace.getName().toUri())
if addedNamespace.getName().get(-1).isSegment() and addedNamespace.getName().get(-1).toSegment() == 0:
addedNamespace.getParent().addOnContentSet(onContentSet)
SegmentedContent(addedNamespace.getParent()).start()
newspaper.addOnNameAdded(onNewName)
newspaper.setFace(face)
namesync = NameSyncHandler(newspaper, userPrefix, keyChain, certificateName)
# The main loop to process Chat while checking stdin to send a message.
print("Enter your namespace update. To quit, enter \"exit\".")
def process():
# while True:
# Set timeout to 0 for an immediate check.
isReady, _, _ = select.select([sys.stdin], [], [], 0)
if len(isReady) != 0:
input = promptAndInput("")
if input == "exit":
stopGui()
# We will send the leave message below.
# break
# before producer has namespace.publish call, we manually call onNameAdded as a hack to publish
namesync.onNameAdded(None, Namespace(Name(input)), 0, True)
face.processEvents()
if root:
root.after(100, process)
def leftKey(event):
global currentSlideName
allVersions = newspaper.getChildComponents()
currentVersion = currentSlideName[-1]
selected = allVersions[0]
for c in allVersions:
print(str(c.toVersion()))
if c.toVersion() == currentVersion.toVersion():
break
selected = c
currentSlideName = Name(newspaper.getName()).append(selected)
displayImage(newspaper.getChild(selected).content.toRawStr(), currentSlideName.toUri())
def rightKey(event):
global currentSlideName
allVersions = newspaper.getChildComponents()
currentVersion = currentSlideName[-1]
selected = None
for c in allVersions[::-1]:
if c.toVersion() == currentVersion.toVersion():
break
selected = c
if selected:
currentSlideName = Name(newspaper.getName()).append(selected)
displayImage(newspaper.getChild(selected).content.toRawStr(), currentSlideName.toUri())
else:
print("no slides to show")
runGui(process, leftKey, rightKey)
