240 lines
9.2 KiB
Python
240 lines
9.2 KiB
Python
from __future__ import print_function
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import os, sys, json, binascii, six, tempfile, zipfile
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from tqdm import tqdm
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from twisted.protocols import basic
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from twisted.internet import reactor
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from twisted.internet.defer import inlineCallbacks, returnValue
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from ..errors import TransferError
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from ..twisted.transcribe import Wormhole
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from ..twisted.transit import TransitSender
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APPID = u"lothar.com/wormhole/text-or-file-xfer"
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@inlineCallbacks
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def send(args, reactor=reactor):
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"""I implement 'wormhole send'. I return a Deferred that fires with None
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(for success), or signals one of the following errors:
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* WrongPasswordError: the two sides didn't use matching passwords
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* Timeout: something didn't happen fast enough for our tastes
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* TransferError: the receiver rejected the transfer: verifier mismatch,
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permission not granted, ack not successful.
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* any other error: something unexpected happened
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"""
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assert isinstance(args.relay_url, type(u""))
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if args.zeromode:
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assert not args.code
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args.code = u"0-"
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# TODO: parallelize the roundtrip that allocates the channel with the
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# (blocking) local IO (file os.stat, zipfile generation)
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phase1, fd_to_send = build_phase1_data(args)
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other_cmd = "wormhole receive"
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if args.verify:
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other_cmd = "wormhole --verify receive"
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if args.zeromode:
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other_cmd += " -0"
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print(u"On the other computer, please run: %s" % other_cmd,
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file=args.stdout)
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tor_manager = None
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if args.tor:
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with args.timing.add("import", which="tor_manager"):
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from ..twisted.tor_manager import TorManager
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tor_manager = TorManager(reactor, timing=args.timing)
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# For now, block everything until Tor has started. Soon: launch tor
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# in parallel with everything else, make sure the TorManager can
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# lazy-provide an endpoint, and overlap the startup process with the
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# user handing off the wormhole code
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yield tor_manager.start()
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w = Wormhole(APPID, args.relay_url, tor_manager, timing=args.timing,
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reactor=reactor)
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d = _send(reactor, w, args, phase1, fd_to_send, tor_manager)
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d.addBoth(w.close)
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yield d
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@inlineCallbacks
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def _send(reactor, w, args, phase1, fd_to_send, tor_manager):
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transit_sender = None
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if fd_to_send:
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transit_sender = TransitSender(args.transit_helper,
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no_listen=args.no_listen,
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tor_manager=tor_manager,
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reactor=reactor,
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timing=args.timing)
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phase1["transit"] = transit_data = {}
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transit_data["relay_connection_hints"] = transit_sender.get_relay_hints()
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direct_hints = yield transit_sender.get_direct_hints()
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transit_data["direct_connection_hints"] = direct_hints
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if args.code:
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w.set_code(args.code)
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code = args.code
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else:
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code = yield w.get_code(args.code_length)
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if not args.zeromode:
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print(u"Wormhole code is: %s" % code, file=args.stdout)
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print(u"", file=args.stdout)
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# get the verifier, because that also lets us derive the transit key,
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# which we want to set before revealing the connection hints to the far
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# side, so we'll be ready for them when they connect
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verifier_bytes = yield w.get_verifier()
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verifier = binascii.hexlify(verifier_bytes).decode("ascii")
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if args.verify:
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while True:
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ok = six.moves.input("Verifier %s. ok? (yes/no): " % verifier)
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if ok.lower() == "yes":
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break
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if ok.lower() == "no":
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err = "sender rejected verification check, abandoned transfer"
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reject_data = json.dumps({"error": err}).encode("utf-8")
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yield w.send_data(reject_data)
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raise TransferError(err)
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if fd_to_send is not None:
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transit_key = w.derive_key(APPID+"/transit-key")
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transit_sender.set_transit_key(transit_key)
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my_phase1_bytes = json.dumps(phase1).encode("utf-8")
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yield w.send_data(my_phase1_bytes)
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# this may raise WrongPasswordError
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them_phase1_bytes = yield w.get_data()
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them_phase1 = json.loads(them_phase1_bytes.decode("utf-8"))
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if fd_to_send is None:
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if them_phase1["message_ack"] == "ok":
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print(u"text message sent", file=args.stdout)
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returnValue(None) # terminates this function
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raise TransferError("error sending text: %r" % (them_phase1,))
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if "error" in them_phase1:
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raise TransferError("remote error, transfer abandoned: %s"
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% them_phase1["error"])
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if them_phase1.get("file_ack") != "ok":
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raise TransferError("ambiguous response from remote, "
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"transfer abandoned: %s" % (them_phase1,))
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tdata = them_phase1["transit"]
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# XXX the downside of closing above, rather than here, is that it leaves
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# the channel claimed for a longer time
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#yield w.close()
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yield _send_file_twisted(tdata, transit_sender, fd_to_send,
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args.stdout, args.hide_progress, args.timing)
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returnValue(None)
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def build_phase1_data(args):
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phase1 = {}
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text = args.text
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if text == "-":
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print(u"Reading text message from stdin..", file=args.stdout)
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text = sys.stdin.read()
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if not text and not args.what:
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text = six.moves.input("Text to send: ")
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if text is not None:
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print(u"Sending text message (%d bytes)" % len(text), file=args.stdout)
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phase1 = { "message": text }
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fd_to_send = None
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return phase1, fd_to_send
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what = os.path.join(args.cwd, args.what)
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what = what.rstrip(os.sep)
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if not os.path.exists(what):
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raise TransferError("Cannot send: no file/directory named '%s'" %
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args.what)
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basename = os.path.basename(what)
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if os.path.isfile(what):
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# we're sending a file
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filesize = os.stat(what).st_size
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phase1["file"] = {
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"filename": basename,
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"filesize": filesize,
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}
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print(u"Sending %d byte file named '%s'" % (filesize, basename),
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file=args.stdout)
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fd_to_send = open(what, "rb")
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return phase1, fd_to_send
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if os.path.isdir(what):
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print(u"Building zipfile..", file=args.stdout)
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# We're sending a directory. Create a zipfile in a tempdir and
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# send that.
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fd_to_send = tempfile.SpooledTemporaryFile()
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# TODO: I think ZIP_DEFLATED means compressed.. check it
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num_files = 0
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num_bytes = 0
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tostrip = len(what.split(os.sep))
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with zipfile.ZipFile(fd_to_send, "w", zipfile.ZIP_DEFLATED) as zf:
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for path,dirs,files in os.walk(what):
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# path always starts with args.what, then sometimes might
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# have "/subdir" appended. We want the zipfile to contain
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# "" or "subdir"
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localpath = list(path.split(os.sep)[tostrip:])
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for fn in files:
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archivename = os.path.join(*tuple(localpath+[fn]))
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localfilename = os.path.join(path, fn)
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zf.write(localfilename, archivename)
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num_bytes += os.stat(localfilename).st_size
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num_files += 1
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fd_to_send.seek(0,2)
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filesize = fd_to_send.tell()
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fd_to_send.seek(0,0)
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phase1["directory"] = {
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"mode": "zipfile/deflated",
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"dirname": basename,
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"zipsize": filesize,
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"numbytes": num_bytes,
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"numfiles": num_files,
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}
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print(u"Sending directory (%d bytes compressed) named '%s'"
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% (filesize, basename), file=args.stdout)
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return phase1, fd_to_send
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raise TypeError("'%s' is neither file nor directory" % args.what)
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@inlineCallbacks
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def _send_file_twisted(tdata, transit_sender, fd_to_send,
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stdout, hide_progress, timing):
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transit_sender.add_their_direct_hints(tdata["direct_connection_hints"])
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transit_sender.add_their_relay_hints(tdata["relay_connection_hints"])
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fd_to_send.seek(0,2)
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filesize = fd_to_send.tell()
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fd_to_send.seek(0,0)
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record_pipe = yield transit_sender.connect()
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timing.add("transit connected")
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# record_pipe should implement IConsumer, chunks are just records
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print(u"Sending (%s).." % record_pipe.describe(), file=stdout)
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progress = tqdm(file=stdout, disable=hide_progress,
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unit="B", unit_scale=True,
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total=filesize)
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def _count(data):
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progress.update(len(data))
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return data
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fs = basic.FileSender()
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with timing.add("tx file"):
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with progress:
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yield fs.beginFileTransfer(fd_to_send, record_pipe,
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transform=_count)
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print(u"File sent.. waiting for confirmation", file=stdout)
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with timing.add("get ack") as t:
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ack = yield record_pipe.receive_record()
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record_pipe.close()
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if ack != b"ok\n":
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t.detail(ack="failed")
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raise TransferError("Transfer failed (remote says: %r)" % ack)
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print(u"Confirmation received. Transfer complete.", file=stdout)
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t.detail(ack="ok")
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