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Merge pull request #177 from lbryio/blob-request-handler-refactor

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refactor BlobRequestHandler
This commit is contained in:
Jack Robison 2016-09-29 23:52:14 -04:00 committed by GitHub
commit 8222f940b4
1 changed files with 46 additions and 36 deletions
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82
lbrynet/core/server/BlobRequestHandler.py
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@ -32,12 +32,14 @@ class BlobRequestHandlerFactory(object):
class BlobRequestHandler(object):
implements(IQueryHandler, IBlobSender)
PAYMENT_RATE_QUERY = 'blob_data_payment_rate'
BLOB_QUERY = 'requested_blob'
def __init__(self, blob_manager, wallet, payment_rate_manager):
self.blob_manager = blob_manager
self.payment_rate_manager = payment_rate_manager
self.wallet = wallet
self.query_identifiers = ['blob_data_payment_rate', 'requested_blob']
self.query_identifiers = [self.PAYMENT_RATE_QUERY, self.BLOB_QUERY]
self.peer = None
self.blob_data_payment_rate = None
self.read_handle = None
@ -54,44 +56,52 @@ class BlobRequestHandler(object):
def handle_queries(self, queries):
response = {}
if self.query_identifiers[0] in queries:
if not self.handle_blob_data_payment_rate(queries[self.query_identifiers[0]]):
response['blob_data_payment_rate'] = "RATE_TOO_LOW"
else:
response['blob_data_payment_rate'] = 'RATE_ACCEPTED'
if self.query_identifiers[1] in queries:
log.debug("Received the client's request to send a blob")
response_fields = {}
response['incoming_blob'] = response_fields
if self.blob_data_payment_rate is None:
response_fields['error'] = "RATE_UNSET"
return defer.succeed(response)
else:
d = self.blob_manager.get_blob(queries[self.query_identifiers[1]], True)
def open_blob_for_reading(blob):
if blob.is_validated():
read_handle = blob.open_for_reading()
if read_handle is not None:
self.currently_uploading = blob
self.read_handle = read_handle
log.info("Sending %s to client", str(blob))
response_fields['blob_hash'] = blob.blob_hash
response_fields['length'] = blob.length
return response
log.warning("We can not send %s", str(blob))
response_fields['error'] = "BLOB_UNAVAILABLE"
return response
d.addCallback(open_blob_for_reading)
return d
if self.PAYMENT_RATE_QUERY in queries:
self._handle_payment_rate_query(response, queries[self.PAYMENT_RATE_QUERY])
if self.BLOB_QUERY in queries:
return self._handle_blob_query(response, queries[self.BLOB_QUERY])
else:
return defer.succeed(response)
def _handle_payment_rate_query(self, response, query):
if not self.handle_blob_data_payment_rate(query):
response['blob_data_payment_rate'] = "RATE_TOO_LOW"
else:
response['blob_data_payment_rate'] = 'RATE_ACCEPTED'
def _handle_blob_query(self, response, query):
log.debug("Received the client's request to send a blob")
response['incoming_blob'] = {}
if self.blob_data_payment_rate is None:
response['incoming_blob']['error'] = "RATE_UNSET"
return defer.succeed(response)
else:
return self._send_blob(response, query)
def _send_blob(self, response, query):
d = self.blob_manager.get_blob(query, True)
d.addCallback(self.open_blob_for_reading, response)
return d
def open_blob_for_reading(self, blob, response):
def failure(msg):
log.warning("We can not send %s: %s", blob, msg)
response['incoming_blob']['error'] = "BLOB_UNAVAILABLE"
return response
if not blob.is_validated():
return failure("blob can't be validated")
read_handle = blob.open_for_reading()
if read_handle is None:
return failure("blob can't be opened")
self.currently_uploading = blob
self.read_handle = read_handle
log.info("Sending %s to client", blob)
response['incoming_blob']['blob_hash'] = blob.blob_hash
response['incoming_blob']['length'] = blob.length
return response
######### IBlobSender #########
def send_blob_if_requested(self, consumer):