Python Data.setContent方法代码示例

# 需要导入模块: from pyndn import Data [as 别名]
# 或者: from pyndn.Data import setContent [as 别名]
    def wrap_content(self, name, content, key=None, key_locator=None):
        """
        @param name - name of the data
        @param content - data to be wrapped
        @param key - key used to sign the data
        @return the content object created
        wraps the given name and content into a content object
        """
        co = Data(Name(name))
        co.setContent(content)
        co.getMetaInfo().setFreshnessPeriod(5000)
        co.getMetaInfo().setFinalBlockID(Name("/%00%09")[0])

        identityStorage = MemoryIdentityStorage()
        privateKeyStorage = MemoryPrivateKeyStorage()
        identityManager = IdentityManager(identityStorage, privateKeyStorage)
        keyChain = KeyChain(identityManager, None)

        # Initialize the storage.
        keyName = Name("/ndn/bms/DSK-default")
        certificateName = keyName.getSubName(0, keyName.size() - 1).append(
                "KEY").append(keyName[-1]).append("ID-CERT").append("0")
        identityStorage.addKey(keyName, KeyType.RSA, Blob(DEFAULT_PUBLIC_KEY_DER))
        privateKeyStorage.setKeyPairForKeyName(keyName, DEFAULT_PUBLIC_KEY_DER, 
                DEFAULT_PRIVATE_KEY_DER)

        keyChain.sign(co, certificateName)

        _data = co.wireEncode()

        return _data.toRawStr()

# 需要导入模块: from pyndn import Data [as 别名]
# 或者: from pyndn.Data import setContent [as 别名]
    def handleDataInterests(self, prefix, interest, transport, prefixId):
        # TODO: verification
        
        # we match the components to the name, and any '_' components
        # are discarded. Then we run a MongoDB query and append the
        # object id to allow for excludes

        chosenSchema = (s for s in self.schemaList 
                if s.dbPrefix.match(prefix)).next()

        interestName = interest.getName()
        responseName = Name(interestName)
        nameFields = chosenSchema.matchNameToSchema(interestName)
        self.log.info("Data requested with params:\n\t{}".format(nameFields))
        allResults = []
        segment = 0
        try:
            segmentComponent = interest.getName()[-4]
            segment = segmentComponent.toSegment()
        except RuntimeError:
            pass
        
        (startPos, results) = self._segmentResponseData(nameFields, segment)
        for result in results:
            dataId = result[u'_id']
            self.log.debug("Found object {}".format(dataId))
            allResults.append(result)

        #responseName.append(str(dataId))
        totalCount = results.count(False)
        responseObject = {'count':totalCount, 'skip':startPos, 'results':allResults}
        responseData = Data(responseName)
        resultEncoded = BSON.encode(responseObject)
        responseData.setContent(resultEncoded)
        transport.send(responseData.wireEncode().buf())

# 需要导入模块: from pyndn import Data [as 别名]
# 或者: from pyndn.Data import setContent [as 别名]
    def publishData(self):
        timestamp = time.time()
        info = {''}
        if self._pir == None:
            cpu_use = ps.cpu_percent()
            users = [u.name for u in ps.users()]
            nProcesses = len(ps.pids())
            memUse = ps.virtual_memory().percent
            swapUse = ps.swap_memory().percent

            info = {'count': self._count, 'cpu_usage':cpu_use, 'users':users, 'processes':nProcesses,
                    'memory_usage':memUse, 'swap_usage':swapUse}
        else:
            info = {'count': self._count, 'pir_bool': self._pir.read()}
        self._count += 1
        
        dataOut = Data(Name(self._dataPrefix).appendVersion(int(timestamp)))
        dataOut.setContent(json.dumps(info))
        dataOut.getMetaInfo().setFreshnessPeriod(10000)
        self.signData(dataOut)

        #self._dataCache.add(dataOut)
        # instead of adding data to content cache, we put data to nfd anyway
        self.send(dataOut.wireEncode().buf())
        print('data name: ' + dataOut.getName().toUri() + '; content: ' + str(info))

        # repeat every 1 seconds
        self.loop.call_later(1, self.publishData)

# 需要导入模块: from pyndn import Data [as 别名]
# 或者: from pyndn.Data import setContent [as 别名]
    def __init__(self, prefix, maxCount=1):
        self.keyChain = KeyChain()
        self.prefix = Name(prefix)
        self.isDone = False

        # Initialize list for Data packet storage.
        # We'll treat the indices as equivalent to the sequence
        # number requested by Interests.
        self.data = []

        finalBlock = Name.Component.fromNumberWithMarker(maxCount - 1, 0x00)
        hourMilliseconds = 3600 * 1000

        # Pre-generate and sign all of Data we can serve.
        # We can also set the FinalBlockID in each packet
        # ahead of time because we know the entire sequence.

        for i in range(maxCount):
            dataName = Name(prefix).appendSegment(i)

            data = Data(dataName)
            data.setContent("Hello, " + dataName.toUri())
            data.getMetaInfo().setFinalBlockID(finalBlock)
            data.getMetaInfo().setFreshnessPeriod(hourMilliseconds)

            self.keyChain.sign(data, self.keyChain.getDefaultCertificateName())

            self.data.append(data)

# 需要导入模块: from pyndn import Data [as 别名]
# 或者: from pyndn.Data import setContent [as 别名]
def main():
    data = Data()
    data.wireDecode(TlvData)

    # Use a hard-wired secret for testing. In a real application the signer
    # ensures that the verifier knows the shared key and its keyName.
    key = Blob(bytearray([
       0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
      16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
    ]))

    if KeyChain.verifyDataWithHmacWithSha256(data, key):
      dump("Hard-coded data signature verification: VERIFIED")
    else:
      dump("Hard-coded data signature verification: FAILED")

    freshData = Data(Name("/ndn/abc"))
    signature = HmacWithSha256Signature()
    signature.getKeyLocator().setType(KeyLocatorType.KEYNAME)
    signature.getKeyLocator().setKeyName(Name("key1"))
    freshData.setSignature(signature)
    freshData.setContent("SUCCESS!")
    dump("Signing fresh data packet", freshData.getName().toUri())
    KeyChain.signWithHmacWithSha256(freshData, key)

    if KeyChain.verifyDataWithHmacWithSha256(freshData, key):
      dump("Freshly-signed data signature verification: VERIFIED")
    else:
      dump("Freshly-signed data signature verification: FAILED")

# 需要导入模块: from pyndn import Data [as 别名]
# 或者: from pyndn.Data import setContent [as 别名]
 def test_copy_fields(self):
     data = Data(self.freshData.getName())
     data.setContent(self.freshData.getContent())
     data.setMetaInfo(self.freshData.getMetaInfo())
     self.credentials.signData(data)
     freshDump = dumpData(data)
     self.assertTrue(dataDumpsEqual(freshDump, initialDump), 'Freshly created data does not match original dump')

# 需要导入模块: from pyndn import Data [as 别名]
# 或者: from pyndn.Data import setContent [as 别名]
	def onPlayingCommand(self, prefix, interest, transport, prefixId):
		
		interestName = Name(interest.getName())
		commandComponent = interest.getName().get(self.prefix.size())
		if commandComponent == Name.Component("stop"):
			pass
		if commandComponent == Name.Component("play"):
			pass
		else:
			songName = commandComponent.toEscapedString()
	    
		songList = []
		songList = songName.split('%2C')
	    
		for i in songList:
			fmusic = i + str("-music.mp3") 
			print "started getting music file", i
			
			g = GetFile(self._repoCommandPrefix, i, self._face, self.getOnset, i)
			
			g.oStream = open(fmusic,'wb')
			g.start()
			
			#self._getFiles.append(g)
			
		d = Data(interest.getName())
		d.setContent("start to play: " + songName + "\n")
		encodedData = d.wireEncode()
		transport.send(encodedData.toBuffer())	

# 需要导入模块: from pyndn import Data [as 别名]
# 或者: from pyndn.Data import setContent [as 别名]
    def onInterest(self, prefix, interest, transport, registeredPrefixId):
	print "received interest"
        initInterest = Name(interest.getName())
        print "interest name:",initInterest.toUri()
	d = Data(interest.getName().append(self.deviceComponent))
	try:
		print "start to set data's content"
                
		currentString = ','.join(currentList)
		d.setContent("songList of " +self.device+":"+currentString+ "\n")
		self.face.registerPrefix(self.changePrefix,self.onInterest,self.onRegisterFailed)	



	    

	except KeyboardInterrupt:
		print "key interrupt"
		sys.exit(1)
	except Exception as e:
		print e
		d.setContent("Bad command\n")
	finally:
		self.keychain.sign(d,self.certificateName)

	encodedData = d.wireEncode()
	transport.send(encodedData.toBuffer())
	print d.getName().toUri()
	print d.getContent()

	self.loop.close()
     
        self.face.shutdown()
        self.face = None

# 需要导入模块: from pyndn import Data [as 别名]
# 或者: from pyndn.Data import setContent [as 别名]
    def onPlayingCommand(self, prefix, interest, transport, prefixId):
	print "receive interest"
        interestName = Name(interest.getName())
        commandComponent = interest.getName().get(self.prefix.size())
        if commandComponent == Name.Component("stop"):
            pass
        if commandComponent == Name.Component("play"):
            pass
        else:
            songName = commandComponent.toEscapedString()
	    print songName
	    songList = []
	    songList = songName.split('%2C')
	    print "songlist and its len",songList,len(songList)
	    for i in songList:
		self.song = i
            	fmusic = i+str("-music.mp3") 
		self.ftxt = i + str("-os.txt")
		self.ffreq = i + str("-freq.txt")
		print "FMUSIC:",fmusic 
		  
	    	self.thread = threading.Thread(target = self.mp.play_music, args = (fmusic,songList,self.q,))
	    	self.thread.daemon = True
            	g = GetFile(self._repoCommandPrefix, i, self._face, self.getOnset)
		#g = GetFile(self._repoCommandPrefix, ftxt, self._face, self.lightFunction)
            	g.oStream = open(fmusic,'wb')
            	g.start()
	   
		
	
	d = Data(interest.getName())
	d.setContent("start to play: " + songName + "\n")
	encodedData = d.wireEncode()
	transport.send(encodedData.toBuffer())	

# 需要导入模块: from pyndn import Data [as 别名]
# 或者: from pyndn.Data import setContent [as 别名]
def generateData(baseName):
    '''
       This appends the segment number to the data name
    '''
    # just make up some data and return it
    ts = (time.time())
    segmentId = 0 # compatible with repo-ng test: may change to test segmented data

    versionComponent = baseName.get(-1) # should have a ts
    dataName = Name(baseName)
    dataName.appendSegment(segmentId)

    d = Data(dataName)
    content = "(" + str(ts) +  ") Data named " + dataName.toUri()
    d.setContent(content)
    d.getMetaInfo().setFinalBlockID(segmentId)
    d.getMetaInfo().setFreshnessPeriod(-1)
    if shouldSign:
        keychain.sign(d, certName)
    else:
        d.setSignature(fakeSignature)

    if shouldCollectStats:
        info = getInfoForVersion(versionComponent.toEscapedString())
        if info is not None:
            info['publish_time'] = ts

    return d

# 需要导入模块: from pyndn import Data [as 别名]
# 或者: from pyndn.Data import setContent [as 别名]
    def onPublishInterest(self, prefix, interest, transport, pxID):
        '''
           For publishing face
        '''
        # just make up some data and return it
        interestName = interest.getName()
        logger.info("Interest for " + interestName.toUri())

        ## CURRENTLY ASSUMES THERE'S A VERSION+SEGMENT SUFFIX!
        dataName = Name(interestName)
        ts = (time.time())
        segmentId = 0
        #try:
        #   segmentId = interestName.get(-1).toSegment()
        #except:
            #logger.debug("Could not find segment id!")
            #dataName.appendSegment(segmentId)
        versionStr = str(interestName.get(-2).getValue())
        logger.debug('Publishing ' + versionStr + ' @ ' + str(ts))

        d = Data(dataName)
        content = "(" + str(ts) +  ") Data named " + dataName.toUri()
        d.setContent(content)
        d.getMetaInfo().setFinalBlockID(segmentId)
        d.getMetaInfo().setFreshnessPeriod(1000)
        self.keychain.sign(d, self.certificateName)

        encodedData = d.wireEncode()

        stats.insertDataForVersion(versionStr, {'publish_time': time.time()})
        transport.send(encodedData.toBuffer())

# 需要导入模块: from pyndn import Data [as 别名]
# 或者: from pyndn.Data import setContent [as 别名]
    def generateData(self, baseName):
        '''
           This appends the segment number to the data name, since repo-ng tends to expect it
        '''
        # just make up some data and return it
        ts = (time.time())
        segmentId = 0 # compatible with repo-ng test: may change to test segmented data

        versionStr = baseName.get(-1).toEscapedString()
        dataName = Name(baseName)
        dataName.appendSegment(segmentId)

        d = Data(dataName)
        content = "(" + str(ts) +  ") Data named " + dataName.toUri()
        d.setContent(content)
        d.getMetaInfo().setFinalBlockID(segmentId)
        d.getMetaInfo().setFreshnessPeriod(-1)
        if shouldSign:
            self.keychain.sign(d, self.certificateName)
        else:
            d.setSignature(self.fakeSignature)

        stats.insertDataForVersion(versionStr, {'publish_time':time.time()})
        logger.debug('Publishing: '+d.getName().toUri())
        return d

# 需要导入模块: from pyndn import Data [as 别名]
# 或者: from pyndn.Data import setContent [as 别名]
    def _onConfigurationReceived(self, prefix, interest, transport, prefixId):
        # the interest we get here is signed by HMAC, let's verify it
        self.tempPrefixId = prefixId # didn't get it from register because of the event loop
        interestName = interest.getName()
        replyData = Data(interestName)
        if len(interestName) == len(prefix):
            # this is a discovery request. Check the exclude to see if we should
            # return our serial
            serial = self.getSerial()
            serialComponent = Name.Component(serial)
            if not interest.getExclude().matches(serialComponent):
                replyData.setContent(serial)
                self.sendData(replyData, transport, False) # no point in signing
        elif (self._hmacHandler.verifyInterest(interest)):
            # we have a match! decode the network parameters
            configComponent = interest.getName()[len(prefix)+1]
            replyData.setContent('200')
            self._hmacHandler.signData(replyData, keyName=self.prefix)
            transport.send(replyData.wireEncode().buf())

            environmentConfig = DeviceConfigurationMessage()
            ProtobufTlv.decode(environmentConfig, configComponent.getValue()) 
            networkPrefix = self._extractNameFromField(environmentConfig.configuration.networkPrefix)
            controllerName = self._extractNameFromField(environmentConfig.configuration.controllerName)
            controllerName = Name(networkPrefix).append(controllerName)

            self._policyManager.setEnvironmentPrefix(networkPrefix)
            self._policyManager.setTrustRootIdentity(controllerName)

            self.deviceSuffix = self._extractNameFromField(environmentConfig.configuration.deviceSuffix)

            self._configureIdentity = Name(networkPrefix).append(self.deviceSuffix) 
            self._sendCertificateRequest(self._configureIdentity)

# 需要导入模块: from pyndn import Data [as 别名]
# 或者: from pyndn.Data import setContent [as 别名]
    def onDeviceListRequest(self, prefix, interest, transport, registeeredPrefix):
        interestName = interest.getName()
        username = interestName.get(4).getValue().toRawStr()
        #TODO guest check
        prefix = Name("/home/user/"+username)
        userHash = self._deviceUserAccessManager.getUserHash(prefix)
        userHMACKey = HMACKey(0,0,userHash,"userHMACKey")
        dump("device dict : ",self._deviceDict)       

        if ( self._accessControlManager.verifyInterestWithHMACKey(interest,userHMACKey) ):
            dump("Verified") 
            deviceProfileList = []
            for prefixStr in self._deviceDict.keys():
                tmp = self._deviceDict[prefixStr]['deviceProfile'].__dict__
                dump("tmp :",tmp)
                if (type(tmp["_prefix"]) != str):
                    tmp["_prefix"] = tmp["_prefix"].toUri()
                deviceProfileList.append(tmp)
           
            data = Data(interestName)
            data.setContent(json.dumps(deviceProfileList))
            self._accessControlManager.signDataWithHMACKey(data,userHMACKey)
            self.sendData(data,transport,sign=False)
        else:
            dump("Not verified")

# 需要导入模块: from pyndn import Data [as 别名]
# 或者: from pyndn.Data import setContent [as 别名]
def onDataInterest(prefix, interest, transport, pxID):
    '''
       For publishing face
    '''
    # just make up some data and return it
    interestName = interest.getName()
    logger.info("Interest for " + interestName.toUri())

    ## CURRENTLY ASSUMES THERE'S A VERSION/SEGMENT SUFFIX!
    dataName = Name(interestName.getPrefix(-1))
    ts = (time.time())
    segmentId = 0
    try:
       segmentId = interestName().get(-1).toSegment()
    except:
        logger.debug("Could not find segment id!")
    dataName.appendSegment(segmentId)

    versionStr = interestName.get(-2).getValue().toRawStr()
    logger.debug('publishing ' + versionStr)
    info = getInfoForVersion(versionStr)

    d = Data(dataName)
    content = "(" + str(ts) +  ") Data named " + dataName.toUri()
    d.setContent(content)
    d.getMetaInfo().setFinalBlockID(segmentId)
    keychain.sign(d, certName)

    encodedData = d.wireEncode()
    now = time.time()

    if info is not None:
        info['publish_time'] = now
    transport.send(encodedData.toBuffer())