delete old reflector code
This commit is contained in:
Jack Robison
Lex Berezhny
parent
34a725f7ad
commit
273e614715
8 changed files with 0 additions and 1032 deletions
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@ -1,65 +0,0 @@
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__doc__ = """
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Reflector is a protocol to re-host lbry blobs and streams
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Client queries and server responses follow, all dicts are encoded as json
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############# Handshake request and response #############
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Upon connecting, the client sends a version handshake:
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{
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'version': int,
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}
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The server replies with the same version
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{
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'version': int,
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}
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############# Stream descriptor requests and responses #############
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(if sending blobs directly this is skipped)
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If the client is reflecting a whole stream, they send a stream descriptor request:
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{
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'sd_blob_hash': str,
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'sd_blob_size': int
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}
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The server indicates if it's aware of this stream already by requesting (or not requesting)
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the stream descriptor blob. If the server has a validated copy of the sd blob, it will
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include the needed_blobs field (a list of blob hashes missing from reflector) in the response.
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If the server does not have the sd blob the needed_blobs field will not be included, as the
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server does not know what blobs it is missing - so the client should send all of the blobs
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in the stream.
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{
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'send_sd_blob': bool
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'needed_blobs': list, conditional
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}
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The client may begin the file transfer of the sd blob if send_sd_blob was True.
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If the client sends the blob, after receiving it the server indicates if the
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transfer was successful:
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{
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'received_sd_blob': bool
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}
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If the transfer was not successful (False), the blob is added to the needed_blobs queue
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############# Blob requests and responses #############
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A client with blobs to reflect (either populated by the client or by the stream descriptor
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response) queries if the server is ready to begin transferring a blob
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{
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'blob_hash': str,
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'blob_size': int
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}
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The server replies, send_blob will be False if the server has a validated copy of the blob:
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{
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'send_blob': bool
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}
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The client may begin the raw blob file transfer if the server replied True.
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If the client sends the blob, the server replies:
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{
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'received_blob': bool
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}
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If the transfer was not successful (False), the blob is re-added to the needed_blobs queue
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Blob requests continue for each of the blobs the client has queued to send, when completed
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the client disconnects.
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"""
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@ -1,206 +0,0 @@
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import json
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import logging
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from twisted.protocols.basic import FileSender
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from twisted.internet.protocol import Protocol, ClientFactory
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from twisted.internet import defer, error
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from lbrynet.extras.reflector.common import IncompleteResponse, REFLECTOR_V2
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log = logging.getLogger(__name__)
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class BlobReflectorClient(Protocol):
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# Protocol stuff
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def connectionMade(self):
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self.blob_manager = self.factory.blob_manager
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self.response_buff = b''
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self.outgoing_buff = ''
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self.blob_hashes_to_send = self.factory.blobs
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self.next_blob_to_send = None
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self.blob_read_handle = None
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self.received_handshake_response = False
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self.protocol_version = self.factory.protocol_version
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self.file_sender = None
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self.producer = None
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self.streaming = False
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self.reflected_blobs = []
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d = self.send_handshake()
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d.addErrback(
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lambda err: log.warning("An error occurred immediately: %s", err.getTraceback()))
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def dataReceived(self, data):
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log.debug('Received %s', data)
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self.response_buff += data
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try:
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msg = self.parse_response(self.response_buff)
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except IncompleteResponse:
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pass
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else:
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self.response_buff = b''
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d = self.handle_response(msg)
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d.addCallback(lambda _: self.send_next_request())
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d.addErrback(self.response_failure_handler)
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def connectionLost(self, reason):
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if reason.check(error.ConnectionDone):
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if self.reflected_blobs:
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log.info('Finished sending data via reflector')
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self.factory.finished_deferred.callback(self.reflected_blobs)
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else:
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log.info('Reflector finished: %s', reason)
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self.factory.finished_deferred.callback(reason)
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# IConsumer stuff
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def registerProducer(self, producer, streaming):
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self.producer = producer
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self.streaming = streaming
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if self.streaming is False:
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from twisted.internet import reactor
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reactor.callLater(0, self.producer.resumeProducing)
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def unregisterProducer(self):
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self.producer = None
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def write(self, data):
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self.transport.write(data)
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if self.producer is not None and self.streaming is False:
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from twisted.internet import reactor
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reactor.callLater(0, self.producer.resumeProducing)
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def send_handshake(self):
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log.debug('Sending handshake')
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self.write(json.dumps({'version': self.protocol_version}).encode())
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return defer.succeed(None)
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def parse_response(self, buff):
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try:
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return json.loads(buff)
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except ValueError:
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raise IncompleteResponse()
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def response_failure_handler(self, err):
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log.warning("An error occurred handling the response: %s", err.getTraceback())
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def handle_response(self, response_dict):
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if self.received_handshake_response is False:
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return self.handle_handshake_response(response_dict)
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else:
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return self.handle_normal_response(response_dict)
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def set_not_uploading(self):
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if self.next_blob_to_send is not None:
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self.read_handle.close()
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self.read_handle = None
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self.next_blob_to_send = None
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self.file_sender = None
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return defer.succeed(None)
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def start_transfer(self):
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assert self.read_handle is not None, \
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"self.read_handle was None when trying to start the transfer"
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d = self.file_sender.beginFileTransfer(self.read_handle, self)
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d.addCallback(lambda _: self.read_handle.close())
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return d
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def handle_handshake_response(self, response_dict):
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if 'version' not in response_dict:
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raise ValueError("Need protocol version number!")
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server_version = int(response_dict['version'])
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if self.protocol_version != server_version:
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raise ValueError(f"I can't handle protocol version {self.protocol_version}!")
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self.received_handshake_response = True
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return defer.succeed(True)
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def handle_normal_response(self, response_dict):
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if self.file_sender is None: # Expecting Server Info Response
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if 'send_blob' not in response_dict:
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raise ValueError("I don't know whether to send the blob or not!")
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if response_dict['send_blob'] is True:
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self.file_sender = FileSender()
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return defer.succeed(True)
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else:
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return self.set_not_uploading()
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else: # Expecting Server Blob Response
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if 'received_blob' not in response_dict:
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raise ValueError("I don't know if the blob made it to the intended destination!")
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else:
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if response_dict['received_blob']:
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self.reflected_blobs.append(self.next_blob_to_send.blob_hash)
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return self.set_not_uploading()
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def open_blob_for_reading(self, blob):
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if blob.get_is_verified():
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read_handle = blob.open_for_reading()
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if read_handle is not None:
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log.debug('Getting ready to send %s', blob.blob_hash)
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self.next_blob_to_send = blob
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self.read_handle = read_handle
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return None
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raise ValueError(
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f"Couldn't open that blob for some reason. blob_hash: {blob.blob_hash}")
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def send_blob_info(self):
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log.debug("Send blob info for %s", self.next_blob_to_send.blob_hash)
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assert self.next_blob_to_send is not None, "need to have a next blob to send at this point"
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log.debug('sending blob info')
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self.write(json.dumps({
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'blob_hash': self.next_blob_to_send.blob_hash,
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'blob_size': self.next_blob_to_send.length
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}).encode())
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def disconnect(self, err):
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self.transport.loseConnection()
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def send_next_request(self):
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if self.file_sender is not None:
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# send the blob
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log.debug('Sending the blob')
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return self.start_transfer()
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elif self.blob_hashes_to_send:
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# open the next blob to send
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blob_hash = self.blob_hashes_to_send[0]
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log.debug('No current blob, sending the next one: %s', blob_hash)
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self.blob_hashes_to_send = self.blob_hashes_to_send[1:]
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blob = self.blob_manager.get_blob(blob_hash)
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self.open_blob_for_reading(blob)
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# send the server the next blob hash + length
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return self.send_blob_info()
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else:
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# close connection
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log.debug('No more blob hashes, closing connection')
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self.transport.loseConnection()
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class BlobReflectorClientFactory(ClientFactory):
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protocol = BlobReflectorClient
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def __init__(self, blob_manager, blobs):
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self.protocol_version = REFLECTOR_V2
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self.blob_manager = blob_manager
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self.blobs = blobs
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self.p = None
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self.finished_deferred = defer.Deferred()
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def buildProtocol(self, addr):
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p = self.protocol()
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p.factory = self
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self.p = p
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return p
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def startFactory(self):
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log.debug('Starting reflector factory')
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ClientFactory.startFactory(self)
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def startedConnecting(self, connector):
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log.debug('Started connecting')
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def clientConnectionLost(self, connector, reason):
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"""If we get disconnected, reconnect to server."""
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log.debug("connection lost: %s", reason.getErrorMessage())
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def clientConnectionFailed(self, connector, reason):
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log.debug("connection failed: %s", reason.getErrorMessage())
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@ -1,346 +0,0 @@
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import json
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import logging
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from twisted.internet.error import ConnectionRefusedError
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from twisted.protocols.basic import FileSender
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from twisted.internet.protocol import Protocol, ClientFactory
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from twisted.internet import defer, error
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from lbrynet.extras.compat import f2d
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from lbrynet.extras.reflector.common import IncompleteResponse, ReflectorRequestError
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from lbrynet.extras.reflector.common import REFLECTOR_V1, REFLECTOR_V2
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log = logging.getLogger(__name__)
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class EncryptedFileReflectorClient(Protocol):
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# Protocol stuff
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def connectionMade(self):
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log.debug("Connected to reflector")
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self.response_buff = b''
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self.outgoing_buff = b''
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self.blob_hashes_to_send = []
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self.failed_blob_hashes = []
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self.next_blob_to_send = None
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self.read_handle = None
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self.sent_stream_info = False
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self.received_descriptor_response = False
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self.received_server_version = False
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self.server_version = None
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self.stream_descriptor = None
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self.descriptor_needed = None
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self.needed_blobs = []
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self.reflected_blobs = []
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self.file_sender = None
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self.producer = None
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self.streaming = False
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self.blob_manager = self.factory.blob_manager
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self.protocol_version = self.factory.protocol_version
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self.stream_hash = self.factory.stream_hash
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self.sd_hash = self.factory.sd_hash
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d = self.load_descriptor()
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d.addCallback(lambda _: self.send_handshake())
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d.addErrback(lambda err: log.warning("An error occurred immediately: %s", err.getTraceback()))
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def dataReceived(self, data):
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self.response_buff += data
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try:
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msg = self.parse_response(self.response_buff)
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except IncompleteResponse:
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pass
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else:
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self.response_buff = b''
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d = self.handle_response(msg)
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d.addCallback(lambda _: self.send_next_request())
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d.addErrback(self.response_failure_handler)
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def store_result(self, result):
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if not self.needed_blobs or len(self.reflected_blobs) == len(self.needed_blobs):
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reflected = True
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else:
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reflected = False
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d = f2d(self.blob_manager.storage.update_reflected_stream(
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self.sd_hash, self.transport.getPeer().host, reflected
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))
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d.addCallback(lambda _: result)
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return d
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def connectionLost(self, reason):
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# make sure blob file readers get closed
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self.set_not_uploading()
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if reason.check(error.ConnectionDone):
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if not self.needed_blobs:
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log.info("Reflector has all blobs for %s", self.stream_descriptor)
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elif not self.reflected_blobs:
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log.info("No more completed blobs for %s to reflect, %i are still needed",
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self.stream_descriptor, len(self.needed_blobs))
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else:
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log.info('Finished sending reflector %i blobs for %s',
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len(self.reflected_blobs), self.stream_descriptor)
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result = self.reflected_blobs
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elif reason.check(error.ConnectionLost):
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log.warning("Stopped reflecting %s after sending %i blobs",
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self.stream_descriptor, len(self.reflected_blobs))
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result = self.reflected_blobs
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else:
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log.info('Reflector finished for %s: %s', self.stream_descriptor,
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reason)
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result = reason
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self.factory.finished_deferred.addCallback(self.store_result)
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self.factory.finished_deferred.callback(result)
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# IConsumer stuff
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def registerProducer(self, producer, streaming):
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self.producer = producer
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self.streaming = streaming
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if self.streaming is False:
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from twisted.internet import reactor
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reactor.callLater(0, self.producer.resumeProducing)
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def unregisterProducer(self):
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self.producer = None
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def write(self, data):
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self.transport.write(data)
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if self.producer is not None and self.streaming is False:
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from twisted.internet import reactor
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reactor.callLater(0, self.producer.resumeProducing)
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def get_validated_blobs(self, blobs_in_stream):
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def get_blobs(blobs):
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for crypt_blob in blobs:
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if crypt_blob.blob_hash and crypt_blob.length:
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yield self.blob_manager.get_blob(crypt_blob.blob_hash, crypt_blob.length)
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return [blob for blob in get_blobs(blobs_in_stream) if blob.get_is_verified()]
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def set_blobs_to_send(self, blobs_to_send):
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for blob in blobs_to_send:
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if blob.blob_hash not in self.blob_hashes_to_send:
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self.blob_hashes_to_send.append(blob.blob_hash)
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def get_blobs_to_send(self):
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def _show_missing_blobs(filtered):
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if filtered:
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needs_desc = "" if not self.descriptor_needed else "descriptor and "
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log.info("Reflector needs %s%i blobs for stream",
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needs_desc,
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len(filtered))
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return filtered
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d = f2d(self.factory.blob_manager.storage.get_blobs_for_stream(self.stream_hash))
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d.addCallback(self.get_validated_blobs)
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if not self.descriptor_needed:
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d.addCallback(lambda filtered:
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[blob for blob in filtered if blob.blob_hash in self.needed_blobs])
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d.addCallback(_show_missing_blobs)
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d.addCallback(self.set_blobs_to_send)
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d.addCallback(lambda _: None if self.descriptor_needed else self.set_not_uploading())
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return d
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def send_request(self, request_dict):
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self.write(json.dumps(request_dict).encode())
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def send_handshake(self):
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self.send_request({'version': self.protocol_version})
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@defer.inlineCallbacks
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def load_descriptor(self):
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if self.sd_hash:
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self.stream_descriptor = yield self.factory.blob_manager.get_blob(self.sd_hash)
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else:
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raise ValueError("no sd hash for stream %s" % self.stream_hash)
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def parse_response(self, buff):
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try:
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return json.loads(buff)
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except ValueError:
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raise IncompleteResponse()
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def response_failure_handler(self, err):
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log.warning("An error occurred handling the response: %s", err.getTraceback())
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def handle_response(self, response_dict):
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if not self.received_server_version:
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return self.handle_handshake_response(response_dict)
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elif not self.received_descriptor_response and self.server_version == REFLECTOR_V2:
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return self.handle_descriptor_response(response_dict)
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else:
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return self.handle_normal_response(response_dict)
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def set_not_uploading(self):
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if self.next_blob_to_send is not None:
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log.debug("Close %s", self.next_blob_to_send)
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self.read_handle.close()
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self.read_handle = None
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self.next_blob_to_send = None
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if self.file_sender is not None:
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self.file_sender.stopProducing()
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self.file_sender = None
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return defer.succeed(None)
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def start_transfer(self):
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assert self.read_handle is not None, \
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"self.read_handle was None when trying to start the transfer"
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d = self.file_sender.beginFileTransfer(self.read_handle, self)
|
||||
d.addCallback(lambda _: self.read_handle.close())
|
||||
return d
|
||||
|
||||
def handle_handshake_response(self, response_dict):
|
||||
if 'version' not in response_dict:
|
||||
raise ValueError("Need protocol version number!")
|
||||
self.server_version = int(response_dict['version'])
|
||||
if self.server_version not in [REFLECTOR_V1, REFLECTOR_V2]:
|
||||
raise ValueError(f"I can't handle protocol version {self.server_version}!")
|
||||
self.received_server_version = True
|
||||
return defer.succeed(True)
|
||||
|
||||
def handle_descriptor_response(self, response_dict):
|
||||
if self.file_sender is None: # Expecting Server Info Response
|
||||
if 'send_sd_blob' not in response_dict:
|
||||
raise ReflectorRequestError("I don't know whether to send the sd blob or not!")
|
||||
if response_dict['send_sd_blob'] is True:
|
||||
self.file_sender = FileSender()
|
||||
else:
|
||||
self.received_descriptor_response = True
|
||||
self.descriptor_needed = response_dict['send_sd_blob']
|
||||
self.needed_blobs = response_dict.get('needed_blobs', [])
|
||||
return self.get_blobs_to_send()
|
||||
else: # Expecting Server Blob Response
|
||||
if 'received_sd_blob' not in response_dict:
|
||||
raise ValueError("I don't know if the sd blob made it to the intended destination!")
|
||||
else:
|
||||
self.received_descriptor_response = True
|
||||
disconnect = False
|
||||
if response_dict['received_sd_blob']:
|
||||
self.reflected_blobs.append(self.next_blob_to_send.blob_hash)
|
||||
log.info("Sent reflector descriptor %s", self.next_blob_to_send)
|
||||
else:
|
||||
log.warning("Reflector failed to receive descriptor %s",
|
||||
self.next_blob_to_send)
|
||||
disconnect = True
|
||||
d = self.set_not_uploading()
|
||||
if disconnect:
|
||||
d.addCallback(lambda _: self.transport.loseConnection())
|
||||
return d
|
||||
|
||||
def handle_normal_response(self, response_dict):
|
||||
if self.file_sender is None: # Expecting Server Info Response
|
||||
if 'send_blob' not in response_dict:
|
||||
raise ValueError("I don't know whether to send the blob or not!")
|
||||
if response_dict['send_blob'] is True:
|
||||
self.file_sender = FileSender()
|
||||
return defer.succeed(True)
|
||||
else:
|
||||
log.info("Reflector already has %s", self.next_blob_to_send)
|
||||
return self.set_not_uploading()
|
||||
else: # Expecting Server Blob Response
|
||||
if 'received_blob' not in response_dict:
|
||||
raise ValueError("I don't know if the blob made it to the intended destination!")
|
||||
else:
|
||||
if response_dict['received_blob']:
|
||||
self.reflected_blobs.append(self.next_blob_to_send.blob_hash)
|
||||
log.debug("Sent reflector blob %s", self.next_blob_to_send)
|
||||
else:
|
||||
log.warning("Reflector failed to receive blob %s", self.next_blob_to_send)
|
||||
return self.set_not_uploading()
|
||||
|
||||
def open_blob_for_reading(self, blob):
|
||||
if blob.get_is_verified():
|
||||
read_handle = blob.open_for_reading()
|
||||
if read_handle is not None:
|
||||
log.debug('Getting ready to send %s', blob.blob_hash)
|
||||
self.next_blob_to_send = blob
|
||||
self.read_handle = read_handle
|
||||
return defer.succeed(None)
|
||||
return defer.fail(ValueError(
|
||||
f"Couldn't open that blob for some reason. blob_hash: {blob.blob_hash}"))
|
||||
|
||||
def send_blob_info(self):
|
||||
assert self.next_blob_to_send is not None, "need to have a next blob to send at this point"
|
||||
r = {
|
||||
'blob_hash': self.next_blob_to_send.blob_hash,
|
||||
'blob_size': self.next_blob_to_send.length
|
||||
}
|
||||
self.send_request(r)
|
||||
|
||||
def send_descriptor_info(self):
|
||||
assert self.stream_descriptor is not None, "need to have a sd blob to send at this point"
|
||||
r = {
|
||||
'sd_blob_hash': self.stream_descriptor.blob_hash,
|
||||
'sd_blob_size': self.stream_descriptor.length
|
||||
}
|
||||
self.sent_stream_info = True
|
||||
self.send_request(r)
|
||||
|
||||
def skip_missing_blob(self, err, blob_hash):
|
||||
err.trap(ValueError)
|
||||
if blob_hash not in self.failed_blob_hashes:
|
||||
log.warning("Failed to reflect blob %s, reason: %s",
|
||||
str(blob_hash)[:16], err.getTraceback())
|
||||
self.blob_hashes_to_send.append(blob_hash)
|
||||
self.failed_blob_hashes.append(blob_hash)
|
||||
else:
|
||||
log.warning("Failed second try reflecting blob %s, giving up, reason: %s",
|
||||
str(blob_hash)[:16], err.getTraceback())
|
||||
|
||||
def send_next_request(self):
|
||||
if self.file_sender is not None:
|
||||
# send the blob
|
||||
return self.start_transfer()
|
||||
elif not self.sent_stream_info:
|
||||
# open the sd blob to send
|
||||
blob = self.stream_descriptor
|
||||
d = self.open_blob_for_reading(blob)
|
||||
d.addCallbacks(lambda _: self.send_descriptor_info(),
|
||||
lambda err: self.skip_missing_blob(err, blob.blob_hash))
|
||||
return d
|
||||
elif self.blob_hashes_to_send:
|
||||
# open the next blob to send
|
||||
blob_hash = self.blob_hashes_to_send[0]
|
||||
self.blob_hashes_to_send = self.blob_hashes_to_send[1:]
|
||||
d = defer.succeed(self.blob_manager.get_blob(blob_hash))
|
||||
d.addCallback(self.open_blob_for_reading)
|
||||
d.addCallbacks(lambda _: self.send_blob_info(),
|
||||
lambda err: self.skip_missing_blob(err, blob.blob_hash))
|
||||
return d
|
||||
# close connection
|
||||
self.transport.loseConnection()
|
||||
|
||||
|
||||
class EncryptedFileReflectorClientFactory(ClientFactory):
|
||||
protocol = EncryptedFileReflectorClient
|
||||
protocol_version = REFLECTOR_V2
|
||||
|
||||
def __init__(self, blob_manager, stream_hash, sd_hash):
|
||||
self.blob_manager = blob_manager
|
||||
self.stream_hash = stream_hash
|
||||
self.sd_hash = sd_hash
|
||||
self.p = None
|
||||
self.finished_deferred = defer.Deferred()
|
||||
|
||||
def buildProtocol(self, addr):
|
||||
p = self.protocol()
|
||||
p.factory = self
|
||||
self.p = p
|
||||
return p
|
||||
|
||||
def startFactory(self):
|
||||
log.debug('Starting reflector factory')
|
||||
ClientFactory.startFactory(self)
|
||||
|
||||
def startedConnecting(self, connector):
|
||||
log.debug('Connecting to reflector')
|
||||
|
||||
def clientConnectionLost(self, connector, reason):
|
||||
"""If we get disconnected, reconnect to server."""
|
||||
|
||||
def clientConnectionFailed(self, connector, reason):
|
||||
if reason.check(ConnectionRefusedError):
|
||||
log.warning("Could not connect to reflector server")
|
||||
else:
|
||||
log.error("Reflector connection failed: %s", reason)
|
||||
|
|
@ -1,27 +0,0 @@
|
|||
REFLECTOR_V1 = 0
|
||||
REFLECTOR_V2 = 1
|
||||
|
||||
|
||||
class ReflectorClientVersionError(Exception):
|
||||
"""
|
||||
Raised by reflector server if client sends an incompatible or unknown version
|
||||
"""
|
||||
|
||||
|
||||
class ReflectorRequestError(Exception):
|
||||
"""
|
||||
Raised by reflector server if client sends a message without the required fields
|
||||
"""
|
||||
|
||||
|
||||
class ReflectorRequestDecodeError(Exception):
|
||||
"""
|
||||
Raised by reflector server if client sends an invalid json request
|
||||
"""
|
||||
|
||||
|
||||
class IncompleteResponse(Exception):
|
||||
"""
|
||||
Raised by reflector server when client sends a portion of a json request,
|
||||
used buffering the incoming request
|
||||
"""
|
||||
|
|
@ -1,63 +0,0 @@
|
|||
from twisted.internet import reactor, defer
|
||||
from lbrynet.extras.reflector.client.client import EncryptedFileReflectorClientFactory
|
||||
from lbrynet.extras.reflector.client.blob import BlobReflectorClientFactory
|
||||
|
||||
|
||||
def _is_ip(host):
|
||||
try:
|
||||
if len(host.split(".")) == 4 and all([0 <= int(x) <= 255 for x in host.split(".")]):
|
||||
return True
|
||||
return False
|
||||
except ValueError:
|
||||
return False
|
||||
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def resolve(host):
|
||||
if _is_ip(host):
|
||||
ip = host
|
||||
else:
|
||||
ip = yield reactor.resolve(host)
|
||||
defer.returnValue(ip)
|
||||
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def _reflect_stream(blob_manager, stream_hash, sd_hash, reflector_server):
|
||||
reflector_address, reflector_port = reflector_server[0], reflector_server[1]
|
||||
factory = EncryptedFileReflectorClientFactory(blob_manager, stream_hash, sd_hash)
|
||||
ip = yield resolve(reflector_address)
|
||||
yield reactor.connectTCP(ip, reflector_port, factory)
|
||||
result = yield factory.finished_deferred
|
||||
defer.returnValue(result)
|
||||
|
||||
|
||||
def _reflect_file(lbry_file, reflector_server):
|
||||
return _reflect_stream(lbry_file.blob_manager, lbry_file.stream_hash, lbry_file.sd_hash, reflector_server)
|
||||
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def _reflect_blobs(blob_manager, blob_hashes, reflector_server):
|
||||
reflector_address, reflector_port = reflector_server[0], reflector_server[1]
|
||||
factory = BlobReflectorClientFactory(blob_manager, blob_hashes)
|
||||
ip = yield resolve(reflector_address)
|
||||
yield reactor.connectTCP(ip, reflector_port, factory)
|
||||
result = yield factory.finished_deferred
|
||||
return result
|
||||
|
||||
|
||||
def reflect_file(lbry_file, reflector_server):
|
||||
if len(reflector_server.split(":")) == 2:
|
||||
host, port = tuple(reflector_server.split(":"))
|
||||
reflector_server = host, int(port)
|
||||
else:
|
||||
reflector_server = reflector_server, 5566
|
||||
return _reflect_file(lbry_file, reflector_server)
|
||||
|
||||
|
||||
def reflect_blob_hashes(blob_hashes, blob_manager, reflector_server):
|
||||
if len(reflector_server.split(":")) == 2:
|
||||
host, port = tuple(reflector_server.split(":"))
|
||||
reflector_server = host, int(port)
|
||||
else:
|
||||
reflector_server = reflector_server, 5566
|
||||
return _reflect_blobs(blob_manager, blob_hashes, reflector_server)
|
||||
|
|
@ -1,325 +0,0 @@
|
|||
import logging
|
||||
import json
|
||||
from twisted.python import failure
|
||||
from twisted.internet import error, defer
|
||||
from twisted.internet.protocol import Protocol, ServerFactory
|
||||
from lbrynet.blob.blob_file import is_valid_blobhash
|
||||
from lbrynet.p2p.Error import DownloadCanceledError, InvalidBlobHashError
|
||||
from lbrynet.p2p.StreamDescriptor import BlobStreamDescriptorReader
|
||||
from lbrynet.p2p.StreamDescriptor import save_sd_info
|
||||
from lbrynet.extras.reflector.common import REFLECTOR_V1, REFLECTOR_V2
|
||||
from lbrynet.extras.reflector.common import ReflectorRequestError, ReflectorClientVersionError
|
||||
|
||||
|
||||
log = logging.getLogger(__name__)
|
||||
|
||||
MAXIMUM_QUERY_SIZE = 200
|
||||
SEND_SD_BLOB = 'send_sd_blob'
|
||||
SEND_BLOB = 'send_blob'
|
||||
RECEIVED_SD_BLOB = 'received_sd_blob'
|
||||
RECEIVED_BLOB = 'received_blob'
|
||||
NEEDED_BLOBS = 'needed_blobs'
|
||||
VERSION = 'version'
|
||||
BLOB_SIZE = 'blob_size'
|
||||
BLOB_HASH = 'blob_hash'
|
||||
SD_BLOB_SIZE = 'sd_blob_size'
|
||||
SD_BLOB_HASH = 'sd_blob_hash'
|
||||
|
||||
|
||||
class ReflectorServer(Protocol):
|
||||
def connectionMade(self):
|
||||
peer_info = self.transport.getPeer()
|
||||
log.debug('Connection made to %s', peer_info)
|
||||
self.peer = self.factory.peer_manager.get_peer(peer_info.host, peer_info.port)
|
||||
self.blob_manager = self.factory.blob_manager
|
||||
self.storage = self.factory.blob_manager.storage
|
||||
self.lbry_file_manager = self.factory.lbry_file_manager
|
||||
self.protocol_version = self.factory.protocol_version
|
||||
self.received_handshake = False
|
||||
self.peer_version = None
|
||||
self.receiving_blob = False
|
||||
self.incoming_blob = None
|
||||
self.blob_finished_d = None
|
||||
self.request_buff = b""
|
||||
|
||||
self.blob_writer = None
|
||||
|
||||
def connectionLost(self, reason=failure.Failure(error.ConnectionDone())):
|
||||
log.info("Reflector upload from %s finished" % self.peer.host)
|
||||
|
||||
def handle_error(self, err):
|
||||
log.error(err.getTraceback())
|
||||
self.transport.loseConnection()
|
||||
|
||||
def send_response(self, response_dict):
|
||||
self.transport.write(json.dumps(response_dict).encode())
|
||||
|
||||
############################
|
||||
# Incoming blob file stuff #
|
||||
############################
|
||||
|
||||
def clean_up_failed_upload(self, err, blob):
|
||||
log.warning("Failed to receive %s", blob)
|
||||
if err.check(DownloadCanceledError):
|
||||
self.blob_manager.delete_blobs([blob.blob_hash])
|
||||
else:
|
||||
log.exception(err)
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def _on_completed_blob(self, blob, response_key):
|
||||
yield self.blob_manager.blob_completed(blob, should_announce=False)
|
||||
|
||||
if response_key == RECEIVED_SD_BLOB:
|
||||
sd_info = yield BlobStreamDescriptorReader(blob).get_info()
|
||||
yield save_sd_info(self.blob_manager, blob.blob_hash, sd_info)
|
||||
yield self.blob_manager.set_should_announce(blob.blob_hash, True)
|
||||
else:
|
||||
stream_hash = yield self.storage.get_stream_of_blob(blob.blob_hash)
|
||||
if stream_hash is not None:
|
||||
blob_num = yield self.storage.get_blob_num_by_hash(stream_hash,
|
||||
blob.blob_hash)
|
||||
if blob_num == 0:
|
||||
yield self.blob_manager.set_should_announce(blob.blob_hash, True)
|
||||
|
||||
yield self.close_blob()
|
||||
log.info("Received %s", blob)
|
||||
yield self.send_response({response_key: True})
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def _on_failed_blob(self, err, response_key):
|
||||
yield self.clean_up_failed_upload(err, self.incoming_blob)
|
||||
yield self.send_response({response_key: False})
|
||||
|
||||
def handle_incoming_blob(self, response_key):
|
||||
"""
|
||||
Open blob for writing and send a response indicating if the transfer was
|
||||
successful when finished.
|
||||
|
||||
response_key will either be received_blob or received_sd_blob
|
||||
"""
|
||||
|
||||
blob = self.incoming_blob
|
||||
self.blob_writer, self.blob_finished_d = blob.open_for_writing(self.peer)
|
||||
self.blob_finished_d.addCallback(self._on_completed_blob, response_key)
|
||||
self.blob_finished_d.addErrback(self._on_failed_blob, response_key)
|
||||
|
||||
def close_blob(self):
|
||||
self.blob_writer.close()
|
||||
self.blob_writer = None
|
||||
self.blob_finished_d = None
|
||||
self.incoming_blob = None
|
||||
self.receiving_blob = False
|
||||
|
||||
####################
|
||||
# Request handling #
|
||||
####################
|
||||
|
||||
def dataReceived(self, data):
|
||||
if self.receiving_blob:
|
||||
self.blob_writer.write(data)
|
||||
else:
|
||||
log.debug('Not yet receiving blob, data needs further processing')
|
||||
self.request_buff += data
|
||||
msg, extra_data = self._get_valid_response(self.request_buff)
|
||||
if msg is not None:
|
||||
self.request_buff = b''
|
||||
d = self.handle_request(msg)
|
||||
d.addErrback(self.handle_error)
|
||||
if self.receiving_blob and extra_data:
|
||||
log.debug('Writing extra data to blob')
|
||||
self.blob_writer.write(extra_data)
|
||||
|
||||
def _get_valid_response(self, response_msg):
|
||||
extra_data = None
|
||||
response = None
|
||||
curr_pos = 0
|
||||
while not self.receiving_blob:
|
||||
next_close_paren = response_msg.find(b'}', curr_pos)
|
||||
if next_close_paren != -1:
|
||||
curr_pos = next_close_paren + 1
|
||||
try:
|
||||
response = json.loads(response_msg[:curr_pos])
|
||||
except ValueError:
|
||||
if curr_pos > MAXIMUM_QUERY_SIZE:
|
||||
raise ValueError("Error decoding response: %s" % str(response_msg))
|
||||
else:
|
||||
pass
|
||||
else:
|
||||
extra_data = response_msg[curr_pos:]
|
||||
break
|
||||
else:
|
||||
break
|
||||
return response, extra_data
|
||||
|
||||
def need_handshake(self):
|
||||
return self.received_handshake is False
|
||||
|
||||
def is_descriptor_request(self, request_dict):
|
||||
if SD_BLOB_HASH not in request_dict or SD_BLOB_SIZE not in request_dict:
|
||||
return False
|
||||
if not is_valid_blobhash(request_dict[SD_BLOB_HASH]):
|
||||
raise InvalidBlobHashError(request_dict[SD_BLOB_HASH])
|
||||
return True
|
||||
|
||||
def is_blob_request(self, request_dict):
|
||||
if BLOB_HASH not in request_dict or BLOB_SIZE not in request_dict:
|
||||
return False
|
||||
if not is_valid_blobhash(request_dict[BLOB_HASH]):
|
||||
raise InvalidBlobHashError(request_dict[BLOB_HASH])
|
||||
return True
|
||||
|
||||
def handle_request(self, request_dict):
|
||||
if self.need_handshake():
|
||||
return self.handle_handshake(request_dict)
|
||||
if self.is_descriptor_request(request_dict):
|
||||
return self.handle_descriptor_request(request_dict)
|
||||
if self.is_blob_request(request_dict):
|
||||
return self.handle_blob_request(request_dict)
|
||||
raise ReflectorRequestError("Invalid request")
|
||||
|
||||
def handle_handshake(self, request_dict):
|
||||
"""
|
||||
Upon connecting, the client sends a version handshake:
|
||||
{
|
||||
'version': int,
|
||||
}
|
||||
|
||||
The server replies with the same version if it is supported
|
||||
{
|
||||
'version': int,
|
||||
}
|
||||
"""
|
||||
|
||||
if VERSION not in request_dict:
|
||||
raise ReflectorRequestError("Client should send version")
|
||||
|
||||
if int(request_dict[VERSION]) not in [REFLECTOR_V1, REFLECTOR_V2]:
|
||||
raise ReflectorClientVersionError("Unknown version: %i" % int(request_dict[VERSION]))
|
||||
|
||||
self.peer_version = int(request_dict[VERSION])
|
||||
log.debug('Handling handshake for client version %i', self.peer_version)
|
||||
self.received_handshake = True
|
||||
return self.send_handshake_response()
|
||||
|
||||
def send_handshake_response(self):
|
||||
d = defer.succeed({VERSION: self.peer_version})
|
||||
d.addCallback(self.send_response)
|
||||
return d
|
||||
|
||||
def handle_descriptor_request(self, request_dict):
|
||||
"""
|
||||
If the client is reflecting a whole stream, they send a stream descriptor request:
|
||||
{
|
||||
'sd_blob_hash': str,
|
||||
'sd_blob_size': int
|
||||
}
|
||||
|
||||
The server indicates if it's aware of this stream already by requesting (or not requesting)
|
||||
the stream descriptor blob. If the server has a validated copy of the sd blob, it will
|
||||
include the needed_blobs field (a list of blob hashes missing from reflector) in the
|
||||
response. If the server does not have the sd blob the needed_blobs field will not be
|
||||
included, as the server does not know what blobs it is missing - so the client should send
|
||||
all of the blobs in the stream.
|
||||
{
|
||||
'send_sd_blob': bool
|
||||
'needed_blobs': list, conditional
|
||||
}
|
||||
|
||||
|
||||
The client may begin the file transfer of the sd blob if send_sd_blob was True.
|
||||
If the client sends the blob, after receiving it the server indicates if the
|
||||
transfer was successful:
|
||||
{
|
||||
'received_sd_blob': bool
|
||||
}
|
||||
"""
|
||||
|
||||
sd_blob_hash = request_dict[SD_BLOB_HASH]
|
||||
sd_blob_size = request_dict[SD_BLOB_SIZE]
|
||||
|
||||
if self.blob_writer is None:
|
||||
d = self.blob_manager.get_blob(sd_blob_hash, sd_blob_size)
|
||||
d.addCallback(self.get_descriptor_response)
|
||||
d.addCallback(self.send_response)
|
||||
else:
|
||||
self.receiving_blob = True
|
||||
d = self.blob_finished_d
|
||||
return d
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def get_descriptor_response(self, sd_blob):
|
||||
if sd_blob.get_is_verified():
|
||||
sd_info = yield BlobStreamDescriptorReader(sd_blob).get_info()
|
||||
yield save_sd_info(self.blob_manager, sd_blob.blob_hash, sd_info)
|
||||
yield self.storage.verify_will_announce_head_and_sd_blobs(sd_info['stream_hash'])
|
||||
response = yield self.request_needed_blobs({SEND_SD_BLOB: False}, sd_info['stream_hash'])
|
||||
else:
|
||||
self.incoming_blob = sd_blob
|
||||
self.receiving_blob = True
|
||||
self.handle_incoming_blob(RECEIVED_SD_BLOB)
|
||||
response = {SEND_SD_BLOB: True}
|
||||
defer.returnValue(response)
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def request_needed_blobs(self, response, stream_hash):
|
||||
needed_blobs = yield self.storage.get_pending_blobs_for_stream(stream_hash)
|
||||
response.update({NEEDED_BLOBS: needed_blobs})
|
||||
defer.returnValue(response)
|
||||
|
||||
def handle_blob_request(self, request_dict):
|
||||
"""
|
||||
A client queries if the server will accept a blob
|
||||
{
|
||||
'blob_hash': str,
|
||||
'blob_size': int
|
||||
}
|
||||
|
||||
The server replies, send_blob will be False if the server has a validated copy of the blob:
|
||||
{
|
||||
'send_blob': bool
|
||||
}
|
||||
|
||||
The client may begin the raw blob file transfer if the server replied True.
|
||||
If the client sends the blob, the server replies:
|
||||
{
|
||||
'received_blob': bool
|
||||
}
|
||||
"""
|
||||
|
||||
blob_hash = request_dict[BLOB_HASH]
|
||||
blob_size = request_dict[BLOB_SIZE]
|
||||
|
||||
if self.blob_writer is None:
|
||||
log.debug('Received info for blob: %s', blob_hash[:16])
|
||||
d = self.blob_manager.get_blob(blob_hash, blob_size)
|
||||
d.addCallback(self.get_blob_response)
|
||||
d.addCallback(self.send_response)
|
||||
else:
|
||||
log.debug('blob is already open')
|
||||
self.receiving_blob = True
|
||||
d = self.blob_finished_d
|
||||
return d
|
||||
|
||||
def get_blob_response(self, blob):
|
||||
if blob.get_is_verified():
|
||||
return defer.succeed({SEND_BLOB: False})
|
||||
else:
|
||||
self.incoming_blob = blob
|
||||
self.receiving_blob = True
|
||||
self.handle_incoming_blob(RECEIVED_BLOB)
|
||||
d = defer.succeed({SEND_BLOB: True})
|
||||
return d
|
||||
|
||||
|
||||
class ReflectorServerFactory(ServerFactory):
|
||||
protocol = ReflectorServer
|
||||
|
||||
def __init__(self, peer_manager, blob_manager, lbry_file_manager):
|
||||
self.peer_manager = peer_manager
|
||||
self.blob_manager = blob_manager
|
||||
self.lbry_file_manager = lbry_file_manager
|
||||
self.protocol_version = REFLECTOR_V2
|
||||
|
||||
def buildProtocol(self, addr):
|
||||
log.debug('Creating a protocol for %s', addr)
|
||||
return ServerFactory.buildProtocol(self, addr)
|
||||
Loading…
Reference in a new issue