class EcChunkWriter(object):
"""
Writes an EC chunk
"""
def __init__(self, chunk, conn, write_timeout=None,
chunk_checksum_algo='md5', **_kwargs):
self._chunk = chunk
self._conn = conn
self.failed = False
self.bytes_transferred = 0
if chunk_checksum_algo:
self.checksum = hashlib.new(chunk_checksum_algo)
else:
self.checksum = None
self.write_timeout = write_timeout or io.CHUNK_TIMEOUT
# we use eventlet Queue to pass data to the send coroutine
self.queue = Queue(io.PUT_QUEUE_DEPTH)
@property
def chunk(self):
return self._chunk
@property
def conn(self):
return self._conn
@classmethod
def connect(cls, chunk, sysmeta, reqid=None,
connection_timeout=None, write_timeout=None, **kwargs):
raw_url = chunk.get("real_url", chunk["url"])
parsed = urlparse(raw_url)
chunk_path = parsed.path.split('/')[-1]
hdrs = headers_from_object_metadata(sysmeta)
if reqid:
hdrs['X-oio-req-id'] = reqid
hdrs[CHUNK_HEADERS["chunk_pos"]] = chunk["pos"]
hdrs[CHUNK_HEADERS["chunk_id"]] = chunk_path
# in the trailer
# metachunk_size & metachunk_hash
trailers = (CHUNK_HEADERS["metachunk_size"],
CHUNK_HEADERS["metachunk_hash"])
if kwargs.get('chunk_checksum_algo'):
trailers = trailers + (CHUNK_HEADERS["chunk_hash"], )
hdrs["Trailer"] = ', '.join(trailers)
with green.ConnectionTimeout(
connection_timeout or io.CONNECTION_TIMEOUT):
conn = io.http_connect(
parsed.netloc, 'PUT', parsed.path, hdrs)
conn.chunk = chunk
return cls(chunk, conn, write_timeout=write_timeout, **kwargs)
def start(self, pool):
"""Spawn the send coroutine"""
pool.spawn(self._send)
def _send(self):
"""Send coroutine loop"""
while True:
# fetch input data from the queue
data = self.queue.get()
# use HTTP transfer encoding chunked
# to write data to RAWX
if not self.failed:
# format the chunk
to_send = "%x\r\n%s\r\n" % (len(data), data)
try:
with green.ChunkWriteTimeout(self.write_timeout):
self.conn.send(to_send)
self.bytes_transferred += len(data)
except (Exception, green.ChunkWriteTimeout) as exc:
self.failed = True
msg = str(exc)
logger.warn("Failed to write to %s (%s)", self.chunk, msg)
self.chunk['error'] = 'write: %s' % msg
self.queue.task_done()
def wait(self):
"""
Wait until all data in the queue
has been processed by the send coroutine
"""
if self.queue.unfinished_tasks:
self.queue.join()
def send(self, data):
# do not send empty data because
# this will end the chunked body
if not data:
return
# put the data to send into the queue
# it will be processed by the send coroutine
self.queue.put(data)
def finish(self, metachunk_size, metachunk_hash):
"""Send metachunk_size and metachunk_hash as trailers"""
parts = [
'0\r\n',
'%s: %s\r\n' % (CHUNK_HEADERS['metachunk_size'],
metachunk_size),
'%s: %s\r\n' % (CHUNK_HEADERS['metachunk_hash'],
metachunk_hash)
]
if self.checksum:
parts.append('%s: %s\r\n' % (CHUNK_HEADERS['chunk_hash'],
self.checksum.hexdigest()))
parts.append('\r\n')
to_send = "".join(parts)
self.conn.send(to_send)
def getresponse(self):
"""Read the HTTP response from the connection"""
# As the server may buffer data before writing it to non-volatile
# storage, we don't know if we have to wait while sending data or
# while reading response, thus we apply the same timeout to both.
with Timeout(self.write_timeout):
return self.conn.getresponse()
class EcChunkWriter(object):
"""
Writes an EC chunk
"""
def __init__(self, chunk, conn, write_timeout=None,
chunk_checksum_algo='md5', perfdata=None, **kwargs):
self._chunk = chunk
self._conn = conn
self.failed = False
self.bytes_transferred = 0
if chunk_checksum_algo:
self.checksum = hashlib.new(chunk_checksum_algo)
else:
self.checksum = None
self.write_timeout = write_timeout or io.CHUNK_TIMEOUT
# we use eventlet Queue to pass data to the send coroutine
self.queue = Queue(io.PUT_QUEUE_DEPTH)
self.reqid = kwargs.get('reqid')
self.perfdata = perfdata
self.logger = kwargs.get('logger', LOGGER)
@property
def chunk(self):
return self._chunk
@property
def conn(self):
return self._conn
@classmethod
def connect(cls, chunk, sysmeta, reqid=None,
connection_timeout=None, write_timeout=None, **kwargs):
raw_url = chunk.get("real_url", chunk["url"])
parsed = urlparse(raw_url)
chunk_path = parsed.path.split('/')[-1]
hdrs = headers_from_object_metadata(sysmeta)
if reqid:
hdrs[REQID_HEADER] = reqid
hdrs[CHUNK_HEADERS["chunk_pos"]] = chunk["pos"]
hdrs[CHUNK_HEADERS["chunk_id"]] = chunk_path
# in the trailer
# metachunk_size & metachunk_hash
trailers = (CHUNK_HEADERS["metachunk_size"],
CHUNK_HEADERS["metachunk_hash"])
if kwargs.get('chunk_checksum_algo'):
trailers = trailers + (CHUNK_HEADERS["chunk_hash"], )
hdrs["Trailer"] = ', '.join(trailers)
with ConnectionTimeout(
connection_timeout or io.CONNECTION_TIMEOUT):
perfdata = kwargs.get('perfdata', None)
if perfdata is not None:
connect_start = monotonic_time()
conn = io.http_connect(
parsed.netloc, 'PUT', parsed.path, hdrs, scheme=parsed.scheme)
conn.set_cork(True)
if perfdata is not None:
connect_end = monotonic_time()
perfdata_rawx = perfdata.setdefault('rawx', dict())
perfdata_rawx['connect.' + chunk['url']] = \
connect_end - connect_start
conn.chunk = chunk
return cls(chunk, conn, write_timeout=write_timeout,
reqid=reqid, **kwargs)
def start(self, pool):
"""Spawn the send coroutine"""
pool.spawn(self._send)
def _send(self):
"""Send coroutine loop"""
self.conn.upload_start = None
while not self.failed:
# fetch input data from the queue
data = self.queue.get()
# use HTTP transfer encoding chunked
# to write data to RAWX
try:
with ChunkWriteTimeout(self.write_timeout):
if self.perfdata is not None \
and self.conn.upload_start is None:
self.conn.upload_start = monotonic_time()
self.conn.send(b"%x\r\n" % len(data))
self.conn.send(data)
self.conn.send(b"\r\n")
self.bytes_transferred += len(data)
eventlet_yield()
except (Exception, ChunkWriteTimeout) as exc:
self.failed = True
msg = text_type(exc)
self.logger.warn("Failed to write to %s (%s, reqid=%s)",
self.chunk, msg, self.reqid)
self.chunk['error'] = 'write: %s' % msg
# Indicate that the data is completely sent
self.queue.task_done()
# Drain the queue before quitting
while True:
try:
self.queue.get_nowait()
self.queue.task_done()
except Empty:
break
def wait(self):
"""
Wait until all data in the queue
has been processed by the send coroutine
"""
self.logger.debug("Waiting for %s to receive data", self.chunk['url'])
# Wait until the data is completely sent to continue
self.queue.join()
def send(self, data):
# do not send empty data because
# this will end the chunked body
if not data:
return
# put the data to send into the queue
# it will be processed by the send coroutine
self.queue.put(data)
def finish(self, metachunk_size, metachunk_hash):
"""
Send metachunk_size and metachunk_hash as trailers.
:returns: the chunk object if the upload has failed, else None
"""
self.wait()
if self.failed:
self.logger.debug("NOT sending end marker and trailers to %s, "
"because upload has failed", self.chunk['url'])
return self.chunk
self.logger.debug("Sending end marker and trailers to %s",
self.chunk['url'])
parts = [
'0\r\n',
'%s: %s\r\n' % (CHUNK_HEADERS['metachunk_size'],
metachunk_size),
'%s: %s\r\n' % (CHUNK_HEADERS['metachunk_hash'],
metachunk_hash)
]
if self.checksum:
parts.append('%s: %s\r\n' % (CHUNK_HEADERS['chunk_hash'],
self.checksum.hexdigest()))
parts.append('\r\n')
to_send = ''.join(parts).encode('utf-8')
if self.perfdata is not None:
fin_start = monotonic_time()
try:
with ChunkWriteTimeout(self.write_timeout):
self.conn.send(to_send)
# Last segment sent, disable TCP_CORK to flush buffers
self.conn.set_cork(False)
except (Exception, ChunkWriteTimeout) as exc:
self.failed = True
msg = text_type(exc)
self.logger.warn("Failed to finish %s (%s, reqid=%s)",
self.chunk, msg, self.reqid)
self.chunk['error'] = 'finish: %s' % msg
return self.chunk
finally:
if self.perfdata is not None:
fin_end = monotonic_time()
rawx_perfdata = self.perfdata.setdefault('rawx', dict())
chunk_url = self.conn.chunk['url']
rawx_perfdata['upload_finish.' + chunk_url] = \
fin_end - fin_start
return None
def getresponse(self):
"""Read the HTTP response from the connection"""
try:
# As the server may buffer data before writing it to non-volatile
# storage, we don't know if we have to wait while sending data or
# while reading response, thus we apply the same timeout to both.
with ChunkWriteTimeout(self.write_timeout):
resp = self.conn.getresponse()
return resp
finally:
if self.perfdata is not None:
perfdata_rawx = self.perfdata.setdefault('rawx', dict())
chunk_url = self.conn.chunk['url']
upload_end = monotonic_time()
perfdata_rawx['upload.' + chunk_url] = \
upload_end - self.conn.upload_start