p2pool/bitcoin/worker_interface.py

   1 from __future__ import division
   2
   3 import StringIO
   4 import json
   5 import random
   6 import sys
   7
   8 from twisted.internet import defer
   9
  10 import p2pool
  11 from p2pool.bitcoin import getwork
  12 from p2pool.util import expiring_dict, jsonrpc, variable
  13
  14 class _Provider(object):
  15     def __init__(self, parent, long_poll):
  16         self.parent = parent
  17         self.long_poll = long_poll
  18
  19     def rpc_getwork(self, request, data=None):
  20         return self.parent._getwork(request, data, long_poll=self.long_poll)
  21
  22 class _GETableServer(jsonrpc.Server):
  23     def __init__(self, provider, render_get_func):
  24         jsonrpc.Server.__init__(self, provider)
  25         self.render_GET = render_get_func
  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 class WorkerInterface(object):
  38     def __init__(self, worker_bridge):
  39         self.worker_bridge = worker_bridge
  40
  41         self.worker_views = {}
  42
  43         self.work_cache = {}
  44         self.work_cache_times = self.worker_bridge.new_work_event.times
  45
  46         self.merkle_roots = expiring_dict.ExpiringDict(300)
  47
  48     def attach_to(self, res, get_handler=None):
  49         res.putChild('', _GETableServer(_Provider(self, long_poll=False), get_handler))
  50
  51         def repost(request):
  52             request.content = StringIO.StringIO(json.dumps(dict(id=0, method='getwork')))
  53             return s.render_POST(request)
  54         s = _GETableServer(_Provider(self, long_poll=True), repost)
  55         res.putChild('long-polling', s)
  56
  57     @defer.inlineCallbacks
  58     def _getwork(self, request, data, long_poll):
  59         request.setHeader('X-Long-Polling', '/long-polling')
  60         request.setHeader('X-Roll-NTime', 'expire=10')
  61         request.setHeader('X-Is-P2Pool', 'true')
  62
  63         if data is not None:
  64             header = getwork.decode_data(data)
  65             if header['merkle_root'] not in self.merkle_roots:
  66                 print >>sys.stderr, '''Couldn't link returned work's merkle root with its handler. This should only happen if this process was recently restarted!'''
  67                 defer.returnValue(False)
  68             handler, orig_timestamp = self.merkle_roots[header['merkle_root']]
  69             dt = header['timestamp'] - orig_timestamp
  70             if dt < 0 or dt % 12 == 11 or dt >= 600:
  71                 print >>sys.stderr, '''Miner %s @ %s rolled timestamp improperly! This may be a bug in the miner that is causing you to lose work!''' % (request.getUser(), request.getClientIP())
  72             defer.returnValue(handler(header, request))
  73
  74         if p2pool.DEBUG:
  75             id = random.randrange(1000, 10000)
  76             print 'POLL %i START is_long_poll=%r user_agent=%r user=%r' % (id, long_poll, request.getHeader('User-Agent'), request.getUser())
  77
  78         if long_poll:
  79             request_id = request.getClientIP(), request.getHeader('Authorization')
  80             if self.worker_views.get(request_id, self.worker_bridge.new_work_event.times) != self.worker_bridge.new_work_event.times:
  81                 if p2pool.DEBUG:
  82                     print 'POLL %i PUSH' % (id,)
  83             else:
  84                 if p2pool.DEBUG:
  85                     print 'POLL %i WAITING' % (id,)
  86                 yield self.worker_bridge.new_work_event.get_deferred()
  87             self.worker_views[request_id] = self.worker_bridge.new_work_event.times
  88
  89         key = self.worker_bridge.preprocess_request(request)
  90
  91         if self.work_cache_times != self.worker_bridge.new_work_event.times:
  92             self.work_cache = {}
  93             self.work_cache_times = self.worker_bridge.new_work_event.times
  94
  95         if key in self.work_cache:
  96             res, orig_timestamp, handler = self.work_cache.pop(key)
  97         else:
  98             res, handler = self.worker_bridge.get_work(*key)
  99             assert res.merkle_root not in self.merkle_roots
 100             orig_timestamp = res.timestamp
 101
 102         self.merkle_roots[res.merkle_root] = handler, orig_timestamp
 103
 104         if res.timestamp + 12 < orig_timestamp + 600:
 105             self.work_cache[key] = res.update(timestamp=res.timestamp + 12), orig_timestamp, handler
 106
 107         if p2pool.DEBUG:
 108             print 'POLL %i END identifier=%i' % (id, self.worker_bridge.new_work_event.times)
 109
 110         defer.returnValue(res.getwork(identifier=str(self.worker_bridge.new_work_event.times), submitold=True))