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 data as bitcoin_data, getwork
  12 from p2pool.util import expiring_dict, jsonrpc, pack, 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.HTTPServer):
  23     def __init__(self, provider, render_get_func):
  24         jsonrpc.HTTPServer.__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.merkle_root_to_handler = expiring_dict.ExpiringDict(300)
  44
  45     def attach_to(self, res, get_handler=None):
  46         res.putChild('', _GETableServer(_Provider(self, long_poll=False), get_handler))
  47
  48         def repost(request):
  49             request.content = StringIO.StringIO(json.dumps(dict(id=0, method='getwork')))
  50             return s.render_POST(request)
  51         s = _GETableServer(_Provider(self, long_poll=True), repost)
  52         res.putChild('long-polling', s)
  53
  54     @defer.inlineCallbacks
  55     def _getwork(self, request, data, long_poll):
  56         request.setHeader('X-Long-Polling', '/long-polling')
  57         request.setHeader('X-Roll-NTime', 'expire=100')
  58         request.setHeader('X-Is-P2Pool', 'true')
  59         if request.getHeader('Host') is not None:
  60             request.setHeader('X-Stratum', 'stratum+tcp://' + request.getHeader('Host'))
  61
  62         if data is not None:
  63             header = getwork.decode_data(data)
  64             if header['merkle_root'] not in self.merkle_root_to_handler:
  65                 print >>sys.stderr, '''Couldn't link returned work's merkle root with its handler. This should only happen if this process was recently restarted!'''
  66                 defer.returnValue(False)
  67             defer.returnValue(self.merkle_root_to_handler[header['merkle_root']](header, request.getUser() if request.getUser() is not None else '', '\0'*self.worker_bridge.COINBASE_NONCE_LENGTH))
  68
  69         if p2pool.DEBUG:
  70             id = random.randrange(1000, 10000)
  71             print 'POLL %i START is_long_poll=%r user_agent=%r user=%r' % (id, long_poll, request.getHeader('User-Agent'), request.getUser())
  72
  73         if long_poll:
  74             request_id = request.getClientIP(), request.getHeader('Authorization')
  75             if self.worker_views.get(request_id, self.worker_bridge.new_work_event.times) != self.worker_bridge.new_work_event.times:
  76                 if p2pool.DEBUG:
  77                     print 'POLL %i PUSH' % (id,)
  78             else:
  79                 if p2pool.DEBUG:
  80                     print 'POLL %i WAITING' % (id,)
  81                 yield self.worker_bridge.new_work_event.get_deferred()
  82             self.worker_views[request_id] = self.worker_bridge.new_work_event.times
  83
  84         x, handler = self.worker_bridge.get_work(*self.worker_bridge.preprocess_request(request.getUser() if request.getUser() is not None else ''))
  85         res = getwork.BlockAttempt(
  86             version=x['version'],
  87             previous_block=x['previous_block'],
  88             merkle_root=bitcoin_data.check_merkle_link(bitcoin_data.hash256(x['coinb1'] + '\0'*self.worker_bridge.COINBASE_NONCE_LENGTH + x['coinb2']), x['merkle_link']),
  89             timestamp=x['timestamp'],
  90             bits=x['bits'],
  91             share_target=x['share_target'],
  92         )
  93         assert res.merkle_root not in self.merkle_root_to_handler
  94
  95         self.merkle_root_to_handler[res.merkle_root] = handler
  96
  97         if p2pool.DEBUG:
  98             print 'POLL %i END identifier=%i' % (id, self.worker_bridge.new_work_event.times)
  99
 100         defer.returnValue(res.getwork(identifier=str(self.worker_bridge.new_work_event.times), submitold=True))