/usr/share/pyshared/d_rats/sessions/file.py is in d-rats 0.3.3-3ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import struct
import os
import time
import zlib
from d_rats.sessions import base, stateful
class NotifyDict(UserDict.UserDict):
def __init__(self, cb, data={}):
UserDict.UserDict.__init__(self)
self.cb = cb
self.data = data
def __setitem__(self, name, value):
self.data[name] = value
self.cb()
class FileTransferSession(stateful.StatefulSession):
type = base.T_FILEXFER
def internal_status(self, vals):
print "XFER STATUS: %s" % vals["msg"]
def status(self, msg):
vals = dict(self.stats)
vals["msg"] = msg
vals["filename"] = self.filename
self.status_cb(vals)
self.last_status = msg
def status_tick(self):
self.status(self.last_status)
def __init__(self, name, status_cb=None, **kwargs):
stateful.StatefulSession.__init__(self, name, **kwargs)
if not status_cb:
self.status_cb = self.internal_status
else:
self.status_cb = status_cb
self.sent_size = self.recv_size = 0
self.retries = 0
self.filename = ""
self.last_status = ""
self.stats = NotifyDict(self.status_tick, self.stats)
self.stats["total_size"] = 0
def get_file_data(self, filename):
f = file(filename, "rb")
data = f.read()
f.close()
return data
def put_file_data(self, filename, data):
f = file(filename, "wb")
f.write(data)
f.close()
def send_file(self, filename):
data = self.get_file_data(filename)
if not data:
return False
try:
offer = struct.pack("I", len(data)) + os.path.basename(filename)
self.write(offer)
except base.SessionClosedError, e:
print "Session closed while sending file information"
return False
self.filename = os.path.basename(filename)
offset = None
for i in range(40):
print "Waiting for start"
try:
resp = self.read()
except base.SessionClosedError, e:
print "Session closed while waiting for start ack"
return False
if not resp:
self.status(_("Waiting for response"))
elif resp == "OK":
self.status(_("Negotiation Complete"))
offset = 0
break
elif resp.startswith("RESUME:"):
resume, _offset = resp.split(":", 1)
print "Got RESUME request at %s" % _offset
try:
offset = int(_offset)
except Exception, e:
print "Unable to parse RESUME value: %s" % e
offset = 0
self.status(_("Resuming at") + "%i" % offset)
break
else:
print "Got unknown start: `%s'" % resp
time.sleep(0.5)
if offset is None:
print "Did not get start response"
return False
self.stats["total_size"] = len(data) + len(offer) - offset
self.stats["start_time"] = time.time()
try:
self.status("Sending")
self.write(data[offset:], timeout=120)
except base.SessionClosedError:
print "Session closed while doing write"
pass
sent = self.stats["sent_size"]
self.close()
if sent != self.stats["total_size"]:
self.status(_("Failed to send file (incomplete)"))
return False
else:
actual = os.stat(filename).st_size
self.stats["sent_size"] = self.stats["total_size"] = actual
self.status(_("Complete"))
return True
def recv_file(self, dir):
self.status(_("Waiting for transfer to start"))
for i in range(40):
try:
data = self.read()
except base.SessionClosedError, e:
print "Session closed while waiting for start"
return None
if data:
break
else:
time.sleep(0.5)
if not data:
self.status(_("No start block received!"))
return None
size, = struct.unpack("I", data[:4])
name = data[4:]
if os.path.isdir(dir):
filename = os.path.join(dir, name)
else:
filename = dir
partfilename = filename + ".part"
if os.path.exists(partfilename):
data = self.get_file_data(self, partfilename)
offset = os.path.getsize(partfilename)
print "Part file exists, resuming at %i" % offset
else:
data = ""
offset = 0
self.status(_("Receiving file") + \
" %s " % name + \
_("of size") + \
" %i" % size)
self.stats["recv_size"] = offset
self.stats["total_size"] = size
self.stats["start_time"] = time.time()
try:
if offset:
print "Sending resume at %i" % offset
self.write("RESUME:%i" % offset)
else:
self.write("OK")
except base.SessionClosedError, e:
print "Session closed while sending start ack"
return None
self.status(_("Waiting for first block"))
while True:
try:
d = self.read()
except base.SessionClosedError:
print "SESSION IS CLOSED"
break
if d:
data += d
self.status(_("Receiving"))
try:
self.put_file_data(filename, data)
if os.path.exists(partfilename):
print "Removing old file part"
os.remove(partfilename)
except Exception, e:
print "Failed to write transfer data: %s" % e
self.put_file_data(self, partfilename, data)
return None
if self.stats["recv_size"] != self.stats["total_size"]:
self.status(_("Failed to receive file (incomplete)"))
return None
else:
actual = os.stat(filename).st_size
self.stats["recv_size"] = self.stats["total_size"] = actual
self.status(_("Complete"))
return filename
def get_file_data(self, filename):
f = file(filename, "rb")
data = f.read()
f.close()
return zlib.compress(data, 9)
def put_file_data(self, filename, zdata):
try:
data = zlib.decompress(zdata)
f = file(filename, "wb")
f.write(data)
f.close()
except zlib.error, e:
raise e
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