def recv_chunks( self, remote_chunk_dir, desired_chunks ):
# shell out and scp
cmd = "/usr/bin/scp -P " + str(self.port)
if self.identity_file != "":
cmd += "-i " + self.identity_file + " "
if remote_chunk_dir[-1] != '/':
remote_chunk_dir += '/'
received_chunks = {}
max_rc = 0
for chunk in desired_chunks:
self.num_sent += 1
if self.num_sent > self.max_sent:
max_rc = E_NO_CONNECT
continue
this_cmd = copy.copy( cmd )
this_cmd += " " + self.remote_user + "@" + self.remote_host + ":" + remote_chunk_dir + str(chunk) + " " + iftfile.get_chunks_dir( self.file_name, self.file_hash ) + "/" + str(chunk)
iftlog.log(1, self.name + ": '" + this_cmd + "'")
pipe = os.popen( this_cmd )
rc = pipe.close()
if rc != None:
iftlog.log(5, self.name + ": scp returned " + str(rc) + " for chunk " + str(chunk))
max_rc = E_NO_CONNECT
continue
chunk_dir = iftfile.get_chunks_dir( self.file_name, self.file_hash )
fd = open( chunk_dir + "/" + str(chunk) )
chunk_data = fd.read()
fd.close()
received_chunks[ chunk ] = chunk_data
return (max_rc, received_chunks)
def recv_chunks( self, remote_chunk_dir, desired_chunks ):
# receive chunks in fragments, since no remote IFTD and the server is HTTP/1.1
try:
byte_ranges = [] # determine byte ranges corresponding to the chunk
if len(desired_chunks) > 1:
desired_chunks.sort()
curr_range = -1
for chunk in desired_chunks:
byte_ranges.append( [ self.job_attrs.get( iftfile.JOB_ATTR_CHUNKSIZE ) * chunk, min( self.job_attrs.get( iftfile.JOB_ATTR_CHUNKSIZE ) * (chunk+1) - 1, self.file_size - 1 ) ] )
else:
byte_ranges = [[ self.job_attrs.get( iftfile.JOB_ATTR_CHUNKSIZE ) * desired_chunks[0], min( self.job_attrs.get( iftfile.JOB_ATTR_CHUNKSIZE ) * (desired_chunks[0]+1) - 1, self.file_size - 1 ) ]]
# translate the byte range into a string
byte_range_str = "bytes="
for brange in byte_ranges:
byte_range_str += str(brange[0]) + "-" + str(brange[1]) + ","
byte_range_str = byte_range_str[:-1] # remove last ,
remote_file = self.job_attrs.get( iftfile.JOB_ATTR_SRC_NAME )
if remote_file[0] != '/':
remote_file = '/' + remote_file
iftlog.log(3, self.name + ": request " + byte_range_str + " of " + remote_file + " from " + self.job_attrs.get( iftfile.JOB_ATTR_SRC_HOST ) )
req = urllib2.Request( "http://" + self.job_attrs.get( iftfile.JOB_ATTR_SRC_HOST ) + ":" + str(self.portnum) + remote_file )
req.add_header( "range", byte_range_str )
resp = urllib2.urlopen( req )
if resp.code < 200 or resp.code > 400:
# error!
return E_NO_CONNECT
# get the data
#resp_data = resp.read()
#data = StringIO( resp_data )
#resp.close()
data = resp
num_chunks = 0
content_type = resp.headers.getheader('content-type')
content_range = resp.headers.getheader('content-range')
if "multipart/byteranges" in content_type:
# multipart response
# get xxxxx from boundary=xxxxx
boundary = content_type[ content_type.find("boundary=") + 9 : ].strip()
chunk_dict = {}
CRLF = "\r\n"
# read the data
read_offset = 0
while True:
line = data.readline()
if len(line) == 0:
break
if line == CRLF:
continue
line = line[ : len(line) - 2 ]
start_byte = -1
stop_byte = -1
if line == "--" + boundary + "--":
break
elif line == "--" + boundary:
while True:
line = data.readline()
if line.lower().startswith("content-range"):
content_range = line[ line.find("bytes ") + 6 : line.find("/") ]
start_byte = int( content_range[0: content_range.find("-")] )
stop_byte = int( content_range[ content_range.find("-") + 1 : ] ) + 1
if line == CRLF:
break
# read data
chunk_id = start_byte / self.job_attrs.get( iftfile.JOB_ATTR_CHUNKSIZE )
#t1 = time.time()
chunk = data.read( stop_byte - start_byte )
#t2 = time.time()
#print "chunk took " + str(t2 - t1)
num_chunks += 1
self.add_chunk( chunk_id, chunk )
if num_chunks > 0:
resp.close()
return 0
else:
resp.close()
return E_NO_DATA
elif content_range != None:
# only one range given, and it's only one chunk
start_byte = int( content_range[ 6 : content_range.find("-") ] )
chunk_id = start_byte / self.job_attrs.get( iftfile.JOB_ATTR_CHUNKSIZE )
self.add_chunk( chunk_id, resp.read() )
resp.close()
return 0
# not a multipart response, even though we expected it!
else:
# byterange request either encompassed the whole file, or this was an HTTP/1.0 server and we got the whole file back.
local_path = iftfile.get_chunks_dir( self.job_attrs.get( iftfile.JOB_ATTR_DEST_NAME ), self.job_attrs.get( iftfile.JOB_ATTR_FILE_HASH ) ) + "/" + os.path.basename( self.job_attrs.get( iftfile.JOB_ATTR_DEST_NAME ) )
rc = self.__write_file( local_path, resp.read() )
if rc == 0:
self.whole_file( local_path )
else:
iftlog.log(5, self.name + ": could not save " + local_path + ", rc = " + str(rc) )
self.recv_finished( TRANSMIT_STATE_FAILURE )
return rc
except Exception, inst:
iftlog.exception( self.name + ": could not receive chunks " + str(desired_chunks), inst)
return E_UNHANDLED_EXCEPTION
def iftsend( job, available_protocols, connect_dict=None, iftd_remote_port = USER_PORT + 1, iftd_xmlrpc_path = "/RPC2", user_timeout = 60 ):
"""
Intelligently send a file to a remote host.
@arg job
This is an iftjob instance containing the job data
@arg available_protocols
This is a list of strings of each available (usable) protocol to use
@arg connect_dict
This is a dictionary of dictionaries mapping protocol names in available_protocols to connection attribute dictionaries.
@arg iftd_remote_port
Remote IFTD XML-RPC port (default is USER_PORT+1)
@arg iftd_xmlrpc_path
Remote IFTD XML-RPC domain (default is /RPC2)
@arg user_timeout
Timeout for XML-RPC calls
"""
from iftdata import SEND_FILES_DIR
job_attrs = job.attrs
# get remote host
recv_host = job.get_attr( iftfile.JOB_ATTR_DEST_HOST )
if recv_host == None:
iftlog.log(5, "iftsend: remote host not defined")
return E_INVAL
# can we even proceed to read this?
filename = job.get_attr( iftfile.JOB_ATTR_SRC_NAME )
# sanity check
if filename == None:
iftlog.log(5, "iftsend: filename is not specified!")
return E_INVAL
if not os.path.exists( filename ):
iftlog.log(5, "iftsend: file " + filename + " does not exist!")
return E_FILE_NOT_FOUND
if not (stat.S_IWUSR & os.stat( filename ).st_mode):
iftlog.log(5, "iftsend: cannot read file " + filename)
return E_IOERROR
if SEND_FILES_DIR[-1] != "/":
SEND_FILES_DIR = SEND_FILES_DIR + "/"
if not filename.startswith(SEND_FILES_DIR, 0, len(SEND_FILES_DIR)):
iftlog.log(5, "iftsend: cannot send file " + filename + ", it is not in " + SEND_FILES_DIR )
return E_FILE_NOT_FOUND
# prepare to send
rc, file_hash, chunk_hashes, chunk_data = prepare_sender( job.get_attr( iftfile.JOB_ATTR_SRC_NAME ), job.get_attr( iftfile.JOB_ATTR_CHUNKSIZE) )
if rc != 0:
iftlog.log(5, "iftsend: could not prepare to send")
return rc
job.set_attr( iftfile.JOB_ATTR_GIVEN_CHUNKS, True ) # we will be given chunks out of band
job.set_meta( iftfile.JOB_ATTR_GIVEN_CHUNKS, Queue.Queue(0) ) # use a blocking queue to get chunks within
# make sure to pass along the file hash
if job.get_attr( iftfile.JOB_ATTR_FILE_HASH ) == None:
job.set_attr( iftfile.JOB_ATTR_FILE_HASH, file_hash )
# make sure to pass along the file size
if job.get_attr( iftfile.JOB_ATTR_FILE_SIZE ) == None:
job.set_attr( iftfile.JOB_ATTR_FILE_SIZE, os.stat( filename ).st_size )
# make sure to pass along the file type
if job.get_attr( iftfile.JOB_ATTR_FILE_TYPE ) == None:
job.set_attr( iftfile.JOB_ATTR_FILE_TYPE, iftstats.fset_filetype( job.attrs ) )
# pass receiver the chunk hashes
if job.get_attr( iftfile.JOB_ATTR_CHUNK_HASHES ) == None:
job.set_attr( iftfile.JOB_ATTR_CHUNK_HASHES, chunk_hashes )
job.set_attr( iftfile.JOB_ATTR_SRC_CHUNK_DIR, iftfile.get_chunks_dir( filename, file_hash, True ) )
m = hashlib.sha1()
m.update( cPickle.dumps( job.attrs ) )
# transmission id is the sha-1 of the job attrs
xmit_id = m.hexdigest()
iftlog.log(3, "iftsend(id: " + xmit_id + "): will send " + str(job.get_attr( iftfile.JOB_ATTR_SRC_NAME )) + " to " + str(job.get_attr( iftfile.JOB_ATTR_DEST_HOST )))
# make clones of each of the protocols
proto_list = []
for proto_name in PROTOCOLS.keys():
if proto_name.find("_sender") < 0:
continue
proto = None
try:
# clone the vanilla protocol so we can run more than one concurrently
proto = copy.deepcopy( PROTOCOLS[proto_name] )
proto.assign_job( job )
except Exception, inst:
iftlog.exception("iftsend: cannot clone " + proto_name + ", skipping...", inst)
continue
proto_list.append( proto )
def get_iftd_sender_data( xmit_id, job_attrs, available_protos, connect_dict ):
"""
Called by the receiver (remote) on the sender (local) to get
the sender's capabilities--specifically, which protocols it
has senders for, and where the chunks will be located.
Return the list of protocols usable to both
sender and receiver.
"""
global TransferCore
error_rc = (xmit_id, None, None, None, None, None, None, None)
file_name = job_attrs.get( iftfile.JOB_ATTR_SRC_NAME )
user_job = iftfile.iftjob( job_attrs )
# does the file exist?
if not os.path.exists( file_name ):
iftlog.log(5, "get_iftd_sender_data: file " + str(file_name) + " does not exist")
return error_rc # don't even bother
# is the file readable?
if not (stat.S_IWUSR & os.stat( file_name ).st_mode):
iftlog.log(5, "get_iftd_sender_data: file " + str(file_name) + " is not readable")
return error_rc # don't bother--can't read
# is the file accessible?
from iftdata import SEND_FILES_DIR
if SEND_FILES_DIR[-1] != '/':
SEND_FILES_DIR = SEND_FILES_DIR + "/"
if not os.path.abspath(file_name).startswith( SEND_FILES_DIR, 0, len(SEND_FILES_DIR)):
iftlog.log(5, "get_iftd_sender_data: will not send " + str(file_name) + ", it is not in " + SEND_FILES_DIR )
return error_rc # access control violation
# get our available protocols
my_protos = proto_names( senders( list_protocols() ) )
other_protos = []
if available_protos:
other_protos = proto_names( available_protos )
# calculate intersection between both available protos
my_protos_set = set( my_protos )
other_protos_set = set( other_protos )
usable_protos_set = my_protos_set.intersection( other_protos_set )
file_size = iftfile.get_filesize( file_name )
iftlog.log(1, "get_iftd_sender_data: file " + str(file_name) + ", size " + str(file_size))
# start my passive senders
sender_names = senders( list_protocols() )
proto_insts = []
for proto in sender_names:
if PROTOCOLS.get(proto) != None and not PROTOCOLS.get(proto).isactive():
p = None
# start this passive sender
try:
p = copy.deepcopy( PROTOCOLS.get(proto) )
except:
iftlog.log(5, "get_iftd_sender_data: could not start passive sender " + proto)
continue
proto_insts.append(p)
expected_fsize = user_job.get_attr( iftfile.JOB_ATTR_FILE_SIZE )
min_fsize = user_job.get_attr( iftfile.JOB_ATTR_FILE_MIN_SIZE )
max_fsize = user_job.get_attr( iftfile.JOB_ATTR_FILE_MAX_SIZE )
# do some sanity checking...
if min_fsize != None and max_fsize != None:
if file_size < min_fsize or file_size > max_fsize:
return error_rc # wrong size expectation
if expected_fsize != None and expected_fsize != file_size:
return error_rc # wrong size expectation
# set up
rc, file_hash, chunk_hashes, chunk_data = prepare_sender( file_name, user_job.get_attr( iftfile.JOB_ATTR_CHUNKSIZE ) )
if rc != 0:
iftlog.log(5, "get_iftd_sender_data: could not prepare to send")
return error_rc
user_job.supply_attr( iftfile.JOB_ATTR_FILE_SIZE, file_size )
user_job.supply_attr( iftfile.JOB_ATTR_FILE_HASH, file_hash )
user_job.supply_attr( iftfile.JOB_ATTR_FILE_TYPE, iftstats.filetype( file_name ) )
passive_protos = start_passive_protos( connect_dict, user_job, proto_insts, 1.0 )
# start passive protocol handling thread
TransferCore.begin_ift_send( xmit_id, user_job, chunk_data, user_job.get_attr( iftfile.JOB_ATTR_CHUNK_TIMEOUT ), connect_dict )
TransferCore.run_ift_send_passive( xmit_id, user_job, passive_protos, user_job.get_attr( iftfile.JOB_ATTR_CHUNK_TIMEOUT ))
proto_mask = [0] * len(sender_names)
for i in xrange(0, len(sender_names)):
p = sender_names[i]
if PROTOCOLS[p].isactive():
proto_mask[i] = True
else:
proto_mask[i] = False
return (xmit_id, iftfile.get_chunks_dir( file_name, file_hash, True), file_size, file_hash, iftstats.filetype(file_name), sender_names, proto_mask, chunk_hashes)
# now we have the protocols available to both of us.
# get the best protocol
features = iftstats.extract_features( job.attrs )
best_proto = iftstats.best_protocol( features )
if best_proto != None:
usable_protos = proto_names( [best_proto] + sender_available_protos )
# make chunk directory in preparation for receiving pieces (i.e. from an active sender)
rc = iftfile.make_chunks_dir( job.get_attr( iftfile.JOB_ATTR_DEST_NAME ), job.get_attr( iftfile.JOB_ATTR_FILE_HASH ) )
if rc != 0:
iftlog.log(5, "iftreceive: could not make chunks directory")
return rc
# record local chunk dir
job.set_attr( iftfile.JOB_ATTR_DEST_CHUNK_DIR, iftfile.get_chunks_dir( job.get_attr( iftfile.JOB_ATTR_DEST_NAME ), job.get_attr( iftfile.JOB_ATTR_FILE_HASH ), remote_iftd ))
# start up a transfer processor with the available protocols
proto_instances = []
iftlog.log(1, "iftreceive: available receivers are " + str([proto + "_receiver" for proto in usable_protos]))
iftlog.log(1, "iftreceive: file chunksize is " + str(job.get_attr( iftfile.JOB_ATTR_CHUNKSIZE ) ) )
for proto in usable_protos:
proto = proto + "_receiver" # if it's available, then there's a receiver available
p = None
try:
p = copy.deepcopy( PROTOCOLS[proto] )
except Exception, inst:
iftlog.log(5, "iftreceive: ERROR: could not clone protocol " + proto)
continue
