Python Data.setContent方法代码示例

# 需要导入模块: from pyndn.data import Data [as 别名]
# 或者: from pyndn.data.Data import setContent [as 别名]
    def _processRecoveryInterest(self, interest, syncDigest, transport):
        logging.getLogger(__name__).info("processRecoveryInterest")
        if self._logFind(syncDigest) != -1:
            tempContent = sync_state_pb2.SyncStateMsg()
            for i in range(self._digestTree.size()):
                content = getattr(tempContent, "ss").add()
                content.name = self._applicationDataPrefixUri
                content.type = SyncState_UPDATE
                content.seqno.seq = self._sequenceNo
                content.seqno.session = self._digestTree.get(i).getSessionNo()

            if len(getattr(tempContent, "ss")) != 0:
                # TODO: Check if this works in Python 3.
#pylint: disable=E1103
                array = tempContent.SerializeToString()
#pylint: enable=E1103
                data = Data(interest.getName())
                data.setContent(Blob(array))
                self._keyChain.sign(data, self._certificateName)
                try:
                    transport.send(data.wireEncode().toBuffer())
                except Exception as ex:
                    logging.getLogger(__name__).error(
                      "Error in transport.send: %s", str(ex))
                    return

                logging.getLogger(__name__).info("send recovery data back")
                logging.getLogger(__name__).info("%s", interest.getName().toUri())

# 需要导入模块: from pyndn.data import Data [as 别名]
# 或者: from pyndn.data.Data import setContent [as 别名]
    def _processRecoveryInterest(self, interest, syncDigest, face):
        logging.getLogger(__name__).info("processRecoveryInterest")
        if self._logFind(syncDigest) != -1:
            tempContent = SyncStateMsg()
            for i in range(self._digestTree.size()):
                content = getattr(tempContent, "ss").add()
                content.name = self._digestTree.get(i).getDataPrefix()
                content.type = SyncState_UPDATE
                content.seqno.seq = self._digestTree.get(i).getSequenceNo()
                content.seqno.session = self._digestTree.get(i).getSessionNo()

            if len(getattr(tempContent, "ss")) != 0:
                # TODO: Check if this works in Python 3.
#pylint: disable=E1103
                array = tempContent.SerializeToString()
#pylint: enable=E1103
                data = Data(interest.getName())
                data.setContent(Blob(array))
                if interest.getName().get(-1).toEscapedString() == "00":
                    # Limit the lifetime of replies to interest for "00" since
                    # they can be different.
                    data.getMetaInfo().setFreshnessPeriod(1000)

                self._keyChain.sign(data, self._certificateName)
                try:
                    face.putData(data)
                except Exception as ex:
                    logging.getLogger(__name__).error(
                      "Error in face.putData: %s", str(ex))
                    return

                logging.getLogger(__name__).info("send recovery data back")
                logging.getLogger(__name__).info("%s", interest.getName().toUri())

# 需要导入模块: from pyndn.data import Data [as 别名]
# 或者: from pyndn.data.Data import setContent [as 别名]
    def _registerPrefixHelper(
      self, registeredPrefixId, prefix, onInterest, onRegisterFailed, flags,
      wireFormat):
        """
        Do the work of registerPrefix to register with NDNx once we have an
        _ndndId.

        :param int registeredPrefixId: The
          _RegisteredPrefix.getNextRegisteredPrefixId() which registerPrefix got
          so it could return it to the caller. If this is 0, then don't add to
          _registeredPrefixTable (assuming it has already been done).
        """
        # Create a ForwardingEntry.
        # Note: ndnd ignores any freshness that is larger than 3600 seconds and
        #   sets 300 seconds instead. To register "forever", (=2000000000 sec),
        #   the freshness period must be omitted.
        forwardingEntry = ForwardingEntry()
        forwardingEntry.setAction("selfreg")
        forwardingEntry.setPrefix(prefix)
        forwardingEntry.setForwardingFlags(flags)
        content = forwardingEntry.wireEncode(wireFormat)

        # Set the ForwardingEntry as the content of a Data packet and sign.
        data = Data()
        data.setContent(content)
        # Set the name to a random value so that each request is unique.
        nonce = bytearray(4)
        for i in range(len(nonce)):
            nonce[i] = _systemRandom.randint(0, 0xff)
        data.getName().append(nonce)
        # The ndnd ignores the signature, so set to blank values.
        data.getSignature().getKeyLocator().setType(
          KeyLocatorType.KEY_LOCATOR_DIGEST)
        data.getSignature().getKeyLocator().setKeyData(
          Blob(bytearray(32), False))
        data.getSignature().setSignature(Blob(bytearray(128), False))
        encodedData = data.wireEncode(wireFormat)

        # Create an interest where the name has the encoded Data packet.
        interestName = Name().append("ndnx").append(self._ndndId).append(
          "selfreg").append(encodedData)

        interest = Interest(interestName)
        interest.setInterestLifetimeMilliseconds(4000.0)
        interest.setScope(1)
        encodedInterest = interest.wireEncode(wireFormat)

        if registeredPrefixId != 0:
            # Save the onInterest callback and send the registration interest.
            self._registeredPrefixTable.append(Node._RegisteredPrefix(
              registeredPrefixId, prefix, onInterest))

        response = Node._RegisterResponse(
          self, prefix, onInterest, onRegisterFailed, flags, wireFormat, False)
        self.expressInterest(
          interest, response.onData, response.onTimeout, wireFormat)

# 需要导入模块: from pyndn.data import Data [as 别名]
# 或者: from pyndn.data.Data import setContent [as 别名]
    def _broadcastSyncState(self, digest, syncMessage):
        """
        Make a data packet with the syncMessage and with name
        applicationBroadcastPrefix_ + digest. Sign and send.

        :param str digest: The root digest as a hex string for the data packet
          name.
        :param sync_state_pb2.SyncState syncMessage:
        """
        data = Data(self._applicationBroadcastPrefix)
        data.getName().append(digest)
        # TODO: Check if this works in Python 3.
        data.setContent(Blob(syncMessage.SerializeToString()))
        self._keyChain.sign(data, self._certificateName)
        self._contentCache.add(data)

# 需要导入模块: from pyndn.data import Data [as 别名]
# 或者: from pyndn.data.Data import setContent [as 别名]
    def _createEKeyData(self, startTimeStamp, endTimeStamp, publicKeyBlob):
        """
        Create an E-KEY Data packet for the given public key.

        :param str startTimeStamp: The start time stamp string to put in the name.
        :param str endTimeStamp: The end time stamp string to put in the name.
        :param Blob publicKeyBlob: A Blob of the public key DER.
        :return: The Data packet.
        :rtype: Data
        """
        name = Name(self._namespace)
        name.append(Encryptor.NAME_COMPONENT_E_KEY).append(startTimeStamp).append(endTimeStamp)

        data = Data(name)
        data.getMetaInfo().setFreshnessPeriod(self._freshnessHours * GroupManager.MILLISECONDS_IN_HOUR)
        data.setContent(publicKeyBlob)
        self._keyChain.sign(data)
        return data

# 需要导入模块: from pyndn.data import Data [as 别名]
# 或者: from pyndn.data.Data import setContent [as 别名]
    def _makeAndPublishCkData(self, onError):
        """
        Make a CK Data packet for _ckName encrypted by the KEK in _kekData and
        insert it in the _storage.

        :param onError: On failure, this calls onError(errorCode, message) where
          errorCode is from EncryptError.ErrorCode, and message is an error
          string.
        :type onError: function object
        :return: True on success, else False.
        :rtype: bool
        """
        try:
            kek = PublicKey(self._kekData.getContent())

            content = EncryptedContent()
            content.setPayload(kek.encrypt
              (Blob(self._ckBits, False), EncryptAlgorithmType.RsaOaep))

            ckData = Data(
              Name(self._ckName).append(EncryptorV2.NAME_COMPONENT_ENCRYPTED_BY)
               .append(self._kekData.getName()))
            ckData.setContent(content.wireEncodeV2())
            # FreshnessPeriod can serve as a soft access control for revoking access.
            ckData.getMetaInfo().setFreshnessPeriod(
              EncryptorV2.DEFAULT_CK_FRESHNESS_PERIOD_MS)
            self._keyChain.sign(ckData, self._ckDataSigningInfo)
            self._storage.insert(ckData)

            logging.getLogger(__name__).info("Publishing CK data: " +
              ckData.getName().toUri())
            return True
        except Exception as ex:
            onError(EncryptError.ErrorCode.EncryptionFailure,
              "Failed to encrypt generated CK with KEK " +
              self._kekData.getName().toUri())
            return False

# 需要导入模块: from pyndn.data import Data [as 别名]
# 或者: from pyndn.data.Data import setContent [as 别名]
    def _registerPrefixHelper(
      self, registeredPrefixId, prefix, onInterest, onRegisterFailed, flags,
      wireFormat, face):
        """
        Do the work of registerPrefix to register with NDNx once we have an
        _ndndId.

        :param int registeredPrefixId: The getNextEntryId() which registerPrefix
          got so it could return it to the caller. If this is 0, then don't add
          to _registeredPrefixTable (assuming it has already been done).
        """
        if not WireFormat.ENABLE_NDNX:
            # We can get here if the command signing info is set, but running NDNx.
            raise RuntimeError(
              "registerPrefix with NDNx is deprecated. To enable while you upgrade your code to use NFD, set WireFormat.ENABLE_NDNX = True")

        # Create a ForwardingEntry.
        # Note: ndnd ignores any freshness that is larger than 3600 seconds and
        #   sets 300 seconds instead. To register "forever", (=2000000000 sec),
        #   the freshness period must be omitted.
        forwardingEntry = ForwardingEntry()
        forwardingEntry.setAction("selfreg")
        forwardingEntry.setPrefix(prefix)
        forwardingEntry.setForwardingFlags(flags)
        content = forwardingEntry.wireEncode(wireFormat)

        # Set the ForwardingEntry as the content of a Data packet and sign.
        data = Data()
        data.setContent(content)
        # Set the name to a random value so that each request is unique.
        nonce = bytearray(4)
        for i in range(len(nonce)):
            nonce[i] = _systemRandom.randint(0, 0xff)
        data.getName().append(nonce)
        # The ndnd ignores the signature, so set to blank values.
        data.getSignature().getKeyLocator().setType(
          KeyLocatorType.KEY_LOCATOR_DIGEST)
        data.getSignature().getKeyLocator().setKeyData(
          Blob(bytearray(32), False))
        data.getSignature().setSignature(Blob(bytearray(128), False))
        encodedData = data.wireEncode(wireFormat)

        # Create an interest where the name has the encoded Data packet.
        interestName = Name().append("ndnx").append(self._ndndId).append(
          "selfreg").append(encodedData)

        interest = Interest(interestName)
        interest.setInterestLifetimeMilliseconds(4000.0)
        interest.setScope(1)

        if registeredPrefixId != 0:
            interestFilterId = 0
            if onInterest != None:
                # registerPrefix was called with the "combined" form that includes
                # the callback, so add an InterestFilterEntry.
                interestFilterId = self.getNextEntryId()
                self.setInterestFilter(
                  interestFilterId, InterestFilter(prefix), onInterest, face)

            self._registeredPrefixTable.append(Node._RegisteredPrefix(
              registeredPrefixId, prefix, interestFilterId))

        # Send the registration interest.
        response = Node._RegisterResponse(
          self, prefix, onInterest, onRegisterFailed, flags, wireFormat, False,
          face)
        self.expressInterest(
          self.getNextEntryId(), interest, response.onData, response.onTimeout,
          wireFormat, face)

# 需要导入模块: from pyndn.data import Data [as 别名]
# 或者: from pyndn.data.Data import setContent [as 别名]
    def _processSyncInterest(self, index, syncDigest, face):
        """
        Common interest processing, using digest log to find the difference
        after syncDigest.

        :return: True if sent a data packet to satisfy the interest, otherwise
          False.
        :rtype: bool
        """
        nameList = []       # of str
        sequenceNoList = [] # of int
        sessionNoList = []  # of int
        for j in range(index + 1, len(self._digestLog)):
            temp = self._digestLog[j].getData() # array of sync_state_pb2.SyncState.
            for i in range(len(temp)):
                syncState = temp[i]
                if syncState.type != SyncState_UPDATE:
                    continue

                if self._digestTree.find(
                      syncState.name, syncState.seqno.session) != -1:
                    n = -1
                    for k in range(len(nameList)):
                        if nameList[k] == syncState.name:
                            n = k
                            break

                    if n == -1:
                        nameList.append(syncState.name)
                        sequenceNoList.append(syncState.seqno.seq)
                        sessionNoList.append(syncState.seqno.session)
                    else:
                        sequenceNoList[n] = syncState.seqno.seq
                        sessionNoList[n] = syncState.seqno.session

        tempContent = SyncStateMsg()
        for i in range(len(nameList)):
            content = getattr(tempContent, "ss").add()
            content.name = nameList[i]
            content.type = SyncState_UPDATE
            content.seqno.seq = sequenceNoList[i]
            content.seqno.session = sessionNoList[i]

        sent = False
        if len(getattr(tempContent, "ss")) != 0:
            name = Name(self._applicationBroadcastPrefix)
            name.append(syncDigest)
            # TODO: Check if this works in Python 3.
#pylint: disable=E1103
            array = tempContent.SerializeToString()
#pylint: enable=E1103
            data = Data(name)
            data.setContent(Blob(array))
            self._keyChain.sign(data, self._certificateName)

            try:
                face.putData(data)
            except Exception as ex:
                logging.getLogger(__name__).error(
                  "Error in face.putData: %s", str(ex))
                return

            sent = True
            logging.getLogger(__name__).info("Sync Data send")
            logging.getLogger(__name__).info("%s", name.toUri())

        return sent

# 需要导入模块: from pyndn.data import Data [as 别名]
# 或者: from pyndn.data.Data import setContent [as 别名]
    def publish(self, interestName, dataName, content, freshnessPeriod, 
      signingInfo = SigningInfo()):
        """
        Put all the segments in the memory store.

        :param Name interestName: If the Interest name ends in a segment,
          immediately send the Data packet for the segment to the Face.
        :param Name dataName: The Data name, which has components after the
          Interest name.
        :param Blob content: The content of the data to be segmented.
        :param float freshnessPeriod The freshness period of the segments,
          in milliseconds.
        :param SigningInfo signingInfo (optional) The SigningInfo for signing
          segment Data packets. If omitted, use the default SigningInfo().
        """
        interestSegment = 0
        if interestName[-1].isSegment():
            interestSegment = interestName[-1].toSegment()

        rawBuffer = content.buf()
        iSegmentBegin = 0
        iEnd = len(content)

        maxPacketSize = int(Common.MAX_NDN_PACKET_SIZE / 2)

        totalSegments = int(len(content) / maxPacketSize)
        finalBlockId = Name.Component.fromSegment(totalSegments)

        segmentPrefix = Name(dataName)
        segmentPrefix.appendVersion(int(Common.getNowMilliseconds()))

        segmentNo = 0
        while(True):
            iSegmentEnd = iSegmentBegin + maxPacketSize
            if iSegmentEnd > iEnd:
                iSegmentEnd = iEnd

            segmentName = Name(segmentPrefix)
            segmentName.appendSegment(segmentNo)

            data = Data(segmentName)
            data.setContent(Blob(rawBuffer[iSegmentBegin : iSegmentEnd]))
            data.getMetaInfo().setFreshnessPeriod(freshnessPeriod)
            data.getMetaInfo().setFinalBlockId(finalBlockId)

            iSegmentBegin = iSegmentEnd

            self._keyChain.sign(data, signingInfo)

            # Only send the segment to the Face if it has a pending interest.
            # Otherwise, the segment is unsolicited.
            if interestSegment == segmentNo:
                self._face.putData(data)

            # Until InMemoryStorageFifo implements an eviction policy, use InMemoryStorageRetaining.
            # storage_.insert(*data, freshnessPeriod)
            self._storage.insert(data)

            # Make and return a callback since segmentName is different each time.
            def makeCallback(localSegmentName):
                def callback():
                    self._storage.remove(localSegmentName)
                return callback

            self._face.callLater(freshnessPeriod, makeCallback(segmentName))

            segmentNo += 1
            
            if not (iSegmentBegin < iEnd):
                break