p2pool/bitcoin/worker_interface.py

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