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 WorkerBridge(object):
  28     def __init__(self):
  29         self.new_work_event = variable.Event()
  30
  31     def preprocess_request(self, request):
  32         return request, # *args to self.compute
  33
  34     def get_work(self, request):
  35         raise NotImplementedError()
  36
  37     def got_response(self, block_header):
  38         print self.got_response, "called with", block_header
  39
  40 class WorkerInterface(object):
  41     def __init__(self, worker_bridge):
  42         self.worker_bridge = worker_bridge
  43
  44         self.worker_views = {}
  45
  46         self.work_cache = {} # request_process_func(request) -> blockattempt
  47
  48         new_work_event = self.worker_bridge.new_work_event
  49         watch_id = new_work_event.watch(lambda *args: self_ref().work_cache.clear())
  50         self_ref = weakref.ref(self, lambda _: new_work_event.unwatch(watch_id))
  51
  52     def attach_to(self, res):
  53         res.putChild('', _Page(self, long_poll=False))
  54         res.putChild('long-polling', _Page(self, long_poll=True))
  55
  56     @defer.inlineCallbacks
  57     def _getwork(self, request, data, long_poll):
  58         request.setHeader('X-Long-Polling', '/long-polling')
  59         request.setHeader('X-Roll-NTime', 'expire=10')
  60
  61         if data is not None:
  62             defer.returnValue(self.worker_bridge.got_response(getwork.decode_data(data), request))
  63
  64         if p2pool.DEBUG:
  65             id = random.randrange(1000, 10000)
  66             print 'POLL %i START is_long_poll=%r user_agent=%r user=%r' % (id, long_poll, request.getHeader('User-Agent'), request.getUser())
  67
  68         if long_poll:
  69             request_id = request.getClientIP(), request.getHeader('Authorization')
  70             if self.worker_views.get(request_id, self.worker_bridge.new_work_event.times) != self.worker_bridge.new_work_event.times:
  71                 if p2pool.DEBUG:
  72                     print 'POLL %i PUSH' % (id,)
  73             else:
  74                 if p2pool.DEBUG:
  75                     print 'POLL %i WAITING' % (id,)
  76                 yield self.worker_bridge.new_work_event.get_deferred()
  77             self.worker_views[request_id] = self.worker_bridge.new_work_event.times
  78
  79         key = self.worker_bridge.preprocess_request(request)
  80
  81         if key in self.work_cache:
  82             res, orig_timestamp = self.work_cache.pop(key)
  83         else:
  84             res = self.worker_bridge.get_work(*key)
  85             orig_timestamp = res.timestamp
  86
  87         if res.timestamp + 12 < orig_timestamp + 600:
  88             self.work_cache[key] = res.update(timestamp=res.timestamp + 12), orig_timestamp
  89
  90         if p2pool.DEBUG:
  91             print 'POLL %i END identifier=%i' % (id, self.worker_bridge.new_work_event.times)
  92
  93         defer.returnValue(res.getwork(identifier=str(self.worker_bridge.new_work_event.times)))