diff options
Diffstat (limited to 'src/leap/soledad/client/http_target/send_protocol.py')
-rw-r--r-- | src/leap/soledad/client/http_target/send_protocol.py | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/leap/soledad/client/http_target/send_protocol.py b/src/leap/soledad/client/http_target/send_protocol.py new file mode 100644 index 00000000..4941aa34 --- /dev/null +++ b/src/leap/soledad/client/http_target/send_protocol.py @@ -0,0 +1,75 @@ +# -*- coding: utf-8 -*- +# send_protocol.py +# Copyright (C) 2016 LEAP +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. +from zope.interface import implementer +from twisted.internet import defer +from twisted.internet import reactor +from twisted.web.iweb import IBodyProducer +from twisted.web.iweb import UNKNOWN_LENGTH + + +@implementer(IBodyProducer) +class DocStreamProducer(object): + """ + A producer that writes the body of a request to a consumer. + """ + + def __init__(self, producer): + """ + Initialize the string produer. + + :param producer: A RequestBody instance and a list of producer calls + :type producer: (.support.RequestBody, [(function, *args)]) + """ + self.body, self.producer = producer + self.length = UNKNOWN_LENGTH + self.pause = False + self.stop = False + + @defer.inlineCallbacks + def startProducing(self, consumer): + """ + Write the body to the consumer. + + :param consumer: Any IConsumer provider. + :type consumer: twisted.internet.interfaces.IConsumer + + :return: A Deferred that fires when production ends. + :rtype: twisted.internet.defer.Deferred + """ + while self.producer and not self.stop: + if self.pause: + yield self.sleep(0.001) + continue + call = self.producer.pop(0) + fun, args = call[0], call[1:] + yield fun(*args) + consumer.write(self.body.pop(1, leave_open=True)) + consumer.write(self.body.pop(0)) # close stream + + def sleep(self, secs): + d = defer.Deferred() + reactor.callLater(secs, d.callback, None) + return d + + def pauseProducing(self): + self.pause = True + + def stopProducing(self): + self.stop = True + + def resumeProducing(self): + self.pause = False |