/usr/lib/python3/dist-packages/wormhole/xfer_util.py is in magic-wormhole 0.10.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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from twisted.internet.defer import inlineCallbacks, returnValue
from . import wormhole
from .tor_manager import get_tor
@inlineCallbacks
def receive(reactor, appid, relay_url, code,
use_tor=False, launch_tor=False, tor_control_port=None,
on_code=None):
"""
This is a convenience API which returns a Deferred that callbacks
with a single chunk of data from another wormhole (and then closes
the wormhole). Under the hood, it's just using an instance
returned from :func:`wormhole.wormhole`. This is similar to the
`wormhole receive` command.
:param unicode appid: our application ID
:param unicode relay_url: the relay URL to use
:param unicode code: a pre-existing code to use, or None
:param bool use_tor: True if we should use Tor, False to not use it (None for default)
:param on_code: if not None, this is called when we have a code (even if you passed in one explicitly)
:type on_code: single-argument callable
"""
tor = None
if use_tor:
tor = yield get_tor(reactor, launch_tor, tor_control_port)
# For now, block everything until Tor has started. Soon: launch
# tor in parallel with everything else, make sure the Tor object
# can lazy-provide an endpoint, and overlap the startup process
# with the user handing off the wormhole code
wh = wormhole.create(appid, relay_url, reactor, tor=tor)
if code is None:
wh.allocate_code()
code = yield wh.get_code()
else:
wh.set_code(code)
# we'll call this no matter what, even if you passed in a code --
# maybe it should be only in the 'if' block above?
if on_code:
on_code(code)
data = yield wh.get_message()
data = json.loads(data.decode("utf-8"))
offer = data.get('offer', None)
if not offer:
raise Exception(
"Do not understand response: {}".format(data)
)
msg = None
if 'message' in offer:
msg = offer['message']
wh.send_message(json.dumps({"answer":
{"message_ack": "ok"}}).encode("utf-8"))
else:
raise Exception(
"Unknown offer type: {}".format(offer.keys())
)
yield wh.close()
returnValue(msg)
@inlineCallbacks
def send(reactor, appid, relay_url, data, code,
use_tor=False, launch_tor=False, tor_control_port=None,
on_code=None):
"""
This is a convenience API which returns a Deferred that callbacks
after a single chunk of data has been sent to another
wormhole. Under the hood, it's just using an instance returned
from :func:`wormhole.wormhole`. This is similar to the `wormhole
send` command.
:param unicode appid: the application ID
:param unicode relay_url: the relay URL to use
:param unicode code: a pre-existing code to use, or None
:param bool use_tor: True if we should use Tor, False to not use it (None for default)
:param on_code: if not None, this is called when we have a code (even if you passed in one explicitly)
:type on_code: single-argument callable
"""
tor = None
if use_tor:
tor = yield get_tor(reactor, launch_tor, tor_control_port)
# For now, block everything until Tor has started. Soon: launch
# tor in parallel with everything else, make sure the Tor object
# can lazy-provide an endpoint, and overlap the startup process
# with the user handing off the wormhole code
wh = wormhole.create(appid, relay_url, reactor, tor=tor)
if code is None:
wh.allocate_code()
code = yield wh.get_code()
else:
wh.set_code(code)
if on_code:
on_code(code)
wh.send_message(
json.dumps({
"offer": {
"message": data
}
}).encode("utf-8")
)
data = yield wh.get_message()
data = json.loads(data.decode("utf-8"))
answer = data.get('answer', None)
yield wh.close()
if answer:
returnValue(None)
else:
raise Exception(
"Unknown answer: {}".format(data)
)
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