p2pool/bitcoin/worker_interface.py

   1 from __future__ import division
   2
   3 import base64
   4 import random
   5 import weakref
   6
   7 from twisted.internet import defer
   8
   9 import p2pool
  10 from p2pool import data as p2pool_data
  11 from p2pool.util import jsonrpc, variable
  12 from p2pool.bitcoin import getwork
  13
  14 def get_username(request):
  15     try:
  16         return base64.b64decode(request.getHeader('Authorization').split(' ', 1)[1]).split(':')[0]
  17     except: # XXX
  18         return None
  19
  20 class LongPollingWorkerInterface(jsonrpc.Server):
  21     def __init__(self, parent):
  22         jsonrpc.Server.__init__(self)
  23         self.parent = parent
  24
  25     def rpc_getwork(self, request, data=None):
  26         return self.parent.getwork(request, data, long_poll=True)
  27
  28 class WorkerInterface(jsonrpc.Server):
  29     def __init__(self, compute, response_callback, new_work_event=variable.Event()):
  30         jsonrpc.Server.__init__(self)
  31
  32         self.compute = compute
  33         self.response_callback = response_callback
  34         self.new_work_event = new_work_event
  35
  36         self.worker_views = {}
  37
  38         self.work_cache = {} # username -> (blockattempt, work-identifier-string)
  39         watch_id = new_work_event.watch(lambda *args: self_ref().work_cache.clear())
  40         self_ref = weakref.ref(self, lambda _: new_work_event.unwatch(watch_id))
  41
  42         self.putChild('long-polling', LongPollingWorkerInterface(self))
  43         self.putChild('', self)
  44
  45     def rpc_getwork(self, request, data=None):
  46         return self.getwork(request, data, long_poll=False)
  47
  48     @defer.inlineCallbacks
  49     def getwork(self, request, data, long_poll):
  50         request.setHeader('X-Long-Polling', '/long-polling')
  51         request.setHeader('X-Roll-NTime', 'expire=10')
  52
  53         if data is not None:
  54             defer.returnValue(self.response_callback(getwork.decode_data(data), request))
  55
  56         if p2pool.DEBUG:
  57             id = random.randrange(1000, 10000)
  58             print 'POLL %i START long_poll=%r user_agent=%r x-work-identifier=%r user=%r' % (id, long_poll, request.getHeader('User-Agent'), request.getHeader('X-Work-Identifier'), get_username(request))
  59
  60         if long_poll:
  61             request_id = request.getClientIP(), request.getHeader('Authorization')
  62             if self.worker_views.get(request_id, self.new_work_event.times) != self.new_work_event.times:
  63                 if p2pool.DEBUG:
  64                     print 'POLL %i PUSH user=%r' % (id, get_username(request))
  65             else:
  66                 if p2pool.DEBUG:
  67                     print 'POLL %i WAITING user=%r' % (id, get_username(request))
  68                 yield self.new_work_event.get_deferred()
  69                 self.worker_views[request_id] = self.new_work_event.times
  70
  71         username = get_username(request)
  72
  73         if username in self.work_cache:
  74             res, identifier = self.work_cache[username]
  75         else:
  76             res, identifier = self.compute(username)
  77
  78         self.work_cache[username] = res.update(timestamp=res.timestamp + 12), identifier # XXX doesn't bound timestamp
  79
  80         if p2pool.DEBUG:
  81             print 'POLL %i END %s user=%r' % (id, p2pool_data.format_hash(identifier), get_username(request)) # XXX identifier is hack
  82
  83         defer.returnValue(res.getwork(identifier=str(identifier)))