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