openmedialibrary/oml/nodes.py

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# -*- coding: utf-8 -*-
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from io import BytesIO
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from queue import Queue
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from threading import Thread
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import gzip
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import json
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import os
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import socket
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import socks
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import time
import urllib.error
import urllib.parse
import urllib.request
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import ox
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from tornado.ioloop import PeriodicCallback
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import settings
import user.models
from websocket import trigger_event
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from localnodes import LocalNodes
from tor_request import get_opener
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from utils import user_sort_key, get_peer
import state
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import db
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import library
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import logging
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logger = logging.getLogger(__name__)
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DEBUG_NODES = False
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class Node(Thread):
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host = None
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local = None
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_online = None
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TIMEOUT = 5
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def __init__(self, nodes, user_id):
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self._nodes = nodes
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self.user_id = user_id
self._opener = get_opener(self.user_id)
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self._q = Queue()
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self._pingcb = PeriodicCallback(self.ping, 10 * settings.server['pull_interval'])
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state.main.add_callback(self._pingcb.start)
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Thread.__init__(self)
self.daemon = True
self.start()
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def run(self):
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self.ping()
while not state.shutdown:
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action = self._q.get()
if state.shutdown:
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break
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if action == 'ping':
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self.online = self.can_connect()
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elif action == 'send_response':
if self.online:
self._send_response()
else:
if not self._q.qsize():
time.sleep(5)
self.send_response()
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elif isinstance(action, list) and len(action) == 2:
if self.online:
self._call(action[0], *action[1])
else:
if not self._q.qsize():
time.sleep(5)
self.queue(action[0], *action[1])
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else:
logger.debug('unknown action %s', action)
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def join(self):
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self._q.put('')
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#return Thread.join(self)
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def ping(self):
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if state.online or self.get_local():
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self._q.put('ping')
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def queue(self, action, *args):
logger.debug('queue node action %s->%s%s', self.user_id, action, args)
self._q.put([action, args])
def _call(self, action, *args):
r = getattr(self, action)(*args)
logger.debug('call node api %s->%s%s = %s', self.user_id, action, args, r)
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@property
def url(self):
if self.local:
if ':' in self.local:
url = 'https://[%s]:%s' % (self.local, self.port)
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else:
url = 'https://%s:%s' % (self.local, self.port)
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else:
url = 'https://%s.onion:9851' % self.user_id
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return url
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@property
def online(self):
return self._online
@online.setter
def online(self, online):
if self._online != online:
self._online = online
self.trigger_status()
else:
self._online = online
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def resolve(self):
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#logger.debug('resolve node %s', self.user_id)
r = self.get_local()
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if r:
self.local = r['host']
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if 'port' in r:
self.port = r['port']
else:
self.local = None
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self.port = 9851
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def get_local(self):
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if self._nodes and self._nodes.local:
return self._nodes.local.get(self.user_id)
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return None
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def request(self, action, *args):
self.resolve()
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url = self.url
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if self.local:
logger.debug('request:%s(%s:%s): %s%s', self.user_id, self.local, self.port, action, list(args))
else:
logger.debug('request:%s: %s%s', self.user_id, action, list(args))
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content = json.dumps([action, args]).encode()
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headers = {
'User-Agent': settings.USER_AGENT,
'X-Node-Protocol': settings.NODE_PROTOCOL,
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'Accept': 'text/plain',
'Accept-Encoding': 'gzip',
'Content-Type': 'application/json',
}
self._opener.addheaders = list(zip(headers.keys(), headers.values()))
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#logger.debug('headers: %s', self._opener.addheaders)
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try:
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r = self._opener.open(url, data=content, timeout=self.TIMEOUT*12)
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except urllib.error.HTTPError as e:
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if e.code == 403:
logger.debug('403: %s (%s)', url, self.user_id)
if state.tasks:
state.tasks.queue('peering', (self.user_id, False))
del self._nodes._nodes[self.user_id]
self.online = False
return None
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logger.debug('urllib2.HTTPError %s %s', e, e.code)
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self.online = False
return None
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except urllib.error.URLError as e:
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logger.debug('urllib2.URLError %s', e)
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self.online = False
return None
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except socket.timeout:
logger.debug('timeout %s', url)
self.online = False
return None
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except:
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logger.debug('unknown url error', exc_info=True)
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self.online = False
return None
data = r.read()
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if r.headers.get('content-encoding', None) == 'gzip':
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data = gzip.GzipFile(fileobj=BytesIO(data)).read()
version = r.headers.get('X-Node-Protocol', None)
if version != settings.NODE_PROTOCOL:
logger.debug('version does not match local: %s remote %s (%s)', settings.NODE_PROTOCOL, version, self.user_id)
self.online = False
if version > settings.NODE_PROTOCOL:
state.update_required = True
return None
response = json.loads(data.decode('utf-8'))
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return response
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def can_connect(self):
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self.resolve()
url = self.url
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if not state.online and not self.local:
return False
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try:
if url:
headers = {
'User-Agent': settings.USER_AGENT,
'X-Node-Protocol': settings.NODE_PROTOCOL,
'Accept-Encoding': 'gzip',
}
self._opener.addheaders = list(zip(headers.keys(), headers.values()))
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self._opener.timeout = 2
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r = self._opener.open(url)
version = r.headers.get('X-Node-Protocol', None)
if version != settings.NODE_PROTOCOL:
logger.debug('version does not match local: %s remote %s', settings.NODE_PROTOCOL, version)
return False
c = r.read()
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if DEBUG_NODES:
logger.debug('can connect to: %s', url)
return True
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except:
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if DEBUG_NODES:
logger.debug('can not connect to: %s', url)
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pass
return False
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def is_online(self):
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return self.online or self.get_local() is not None
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def send_response(self):
self._q.put('send_response')
def _send_response(self):
with db.session():
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u = user.models.User.get(self.user_id)
if u:
user_pending = u.pending
user_peered = u.peered
user_queued = u.queued
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else:
user_queued = False
if DEBUG_NODES:
logger.debug('go online peered=%s queued=%s %s (%s)', u.peered, u.queued, u.id, u.nickname)
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if user_queued:
if DEBUG_NODES:
logger.debug('connected to %s', self.url)
logger.debug('queued peering event pending=%s peered=%s', user_pending, user_peered)
if user_pending == 'sent':
self.peering('requestPeering')
elif user_pending == '' and user_peered:
self.peering('acceptPeering')
else:
#fixme, what about cancel/reject peering here?
self.peering('removePeering')
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def trigger_status(self):
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if self.online is not None:
trigger_event('status', {
'id': self.user_id,
'online': self.online
})
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def pullChanges(self):
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if state.shutdown:
return
self.online = self.can_connect()
if not self.online or state.shutdown:
return
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self.resolve()
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peer = get_peer(self.user_id)
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path = peer._logpath
if os.path.exists(path):
size = os.path.getsize(path)
else:
size = 0
url = '%s/log' % self.url
if DEBUG_NODES:
logger.debug('pullChanges: %s [%s]', self.user_id, url)
headers = self.headers.copy()
if size:
headers['Range'] = '%s-' % size
self._opener.addheaders = list(zip(headers.keys(), headers.values()))
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try:
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r = self._opener.open(url, timeout=self.TIMEOUT*60)
except urllib.error.HTTPError as e:
if e.code == 403:
logger.debug('pullChanges 403: %s (%s)', url, self.user_id)
if state.tasks:
state.tasks.queue('peering', (self.user_id, False))
del self._nodes._nodes[self.user_id]
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self.online = False
else:
logger.debug('unknown http errpr %s %s (%s)', e.code, url, self.user_id)
return False
except socket.timeout:
logger.debug('timeout %s', url)
return False
except socks.GeneralProxyError:
logger.debug('openurl failed %s', url)
return False
except urllib.error.URLError as e:
logger.debug('openurl failed urllib2.URLError %s', e.reason)
return False
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except:
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logger.debug('openurl failed %s', url, exc_info=True)
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return False
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if r.getcode() in (200, 206):
changed = False
chunk_size = 16 * 1024
mode = 'ab' if r.getcode() == 206 else 'wb'
content = b''
try:
if r.headers.get('content-encoding', None) == 'gzip':
fileobj = gzip.GzipFile(fileobj=r)
else:
fileobj = r
for chunk in iter(lambda: fileobj.read(chunk_size), b''):
content += chunk
eol = content.rfind(b'\n') + 1
if eol > 0:
with open(path, mode) as fd:
fd.write(content[:eol])
content = content[eol:]
mode = 'ab'
changed = True
if state.shutdown:
return False
if state.bandwidth:
while not state.bandwidth.download(chunk_size) and not state.shutdown:
time.sleep(0.1)
if content:
with open(path, mode) as fd:
fd.write(content)
changed = True
if changed:
peer.apply_log()
except:
logger.debug('download failed %s', url, exc_info=True)
return False
else:
logger.debug('FAILED %s', url)
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return False
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def peering(self, action):
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pull_changes = False
with db.session():
u = user.models.User.get_or_create(self.user_id)
user_info = u.info
if action in ('requestPeering', 'acceptPeering'):
r = self.request(action, settings.preferences['username'], user_info.get('message'))
else:
r = self.request(action, user_info.get('message'))
if r is not None:
with db.session():
u = user.models.User.get(self.user_id)
u.queued = False
if 'message' in u.info:
del u.info['message']
u.save()
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if action == 'acceptPeering':
pull_changes = True
else:
logger.debug('peering failed? %s %s', action, r)
if action in ('cancelPeering', 'rejectPeering', 'removePeering'):
self.online = False
with db.session():
u = user.models.User.get(self.user_id)
trigger_event('peering.%s' % action.replace('Peering', ''), u.json())
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if pull_changes:
self.pullChanges()
return True
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headers = {
'X-Node-Protocol': settings.NODE_PROTOCOL,
'User-Agent': settings.USER_AGENT,
'Accept-Encoding': 'gzip',
}
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def download(self, item):
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self.resolve()
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url = '%s/get/%s' % (self.url, item.id)
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if DEBUG_NODES:
logger.debug('download %s', url)
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self._opener.addheaders = list(zip(self.headers.keys(), self.headers.values()))
try:
r = self._opener.open(url, timeout=self.TIMEOUT*5)
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except socket.timeout:
logger.debug('timeout %s', url)
return False
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except socks.GeneralProxyError:
logger.debug('openurl failed %s', url)
return False
except urllib.error.URLError as e:
logger.debug('openurl failed urllib2.URLError %s', e.reason)
return False
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except:
logger.debug('openurl failed %s', url, exc_info=True)
return False
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if r.getcode() == 200:
try:
if r.headers.get('content-encoding', None) == 'gzip':
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fileobj = gzip.GzipFile(fileobj=r)
else:
fileobj = r
content = []
ct = time.time()
size = item.info['size']
received = 0
chunk_size = 16*1024
for chunk in iter(lambda: fileobj.read(chunk_size), b''):
content.append(chunk)
received += len(chunk)
if time.time() - ct > 1:
ct = time.time()
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if state.shutdown:
return False
t = state.downloads.transfers.get(item.id)
if not t: # transfer was canceled
trigger_event('transfer', {
'id': item.id, 'progress': -1
})
return False
else:
t['progress'] = received / size
trigger_event('transfer', {
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'id': item.id, 'progress': t['progress']
})
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state.downloads.transfers[item.id] = t
if state.bandwidth:
while not state.bandwidth.download(chunk_size) and not state.shutdown:
time.sleep(0.1)
return item.save_file(b''.join(content))
except:
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logger.debug('download failed %s', url, exc_info=True)
return False
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else:
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logger.debug('FAILED %s', url)
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return False
def download_preview(self, item_id):
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from item.icons import icons
self.resolve()
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if DEBUG_NODES:
logger.debug('download preview for %s from %s', item_id, self.url)
url = '%s/preview/%s' % (self.url, item_id)
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self._opener.addheaders = list(zip(self.headers.keys(), self.headers.values()))
try:
r = self._opener.open(url, timeout=self.TIMEOUT*2)
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except socket.timeout:
logger.debug('timeout %s', url)
return False
except socks.GeneralProxyError:
logger.debug('download failed %s', url)
return False
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except:
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logger.debug('download failed %s', url, exc_info=True)
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self.online = False
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return False
code = r.getcode()
if code == 200:
try:
if r.headers.get('content-encoding', None) == 'gzip':
fileobj = gzip.GzipFile(fileobj=r)
else:
fileobj = r
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content = fileobj.read()
key = 'preview:' + item_id
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icons[key] = content
icons.clear(key+':')
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return True
except:
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logger.debug('preview download failed %s', url, exc_info=True)
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elif code == 404:
pass
else:
logger.debug('FAILED %s', url)
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return False
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def download_upgrade(self, release):
for module in release['modules']:
path = os.path.join(settings.update_path, release['modules'][module]['name'])
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if not os.path.exists(path):
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url = '%s/oml/%s' % (self.url, release['modules'][module]['name'])
sha1 = release['modules'][module]['sha1']
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headers = {
'User-Agent': settings.USER_AGENT,
}
self._opener.addheaders = list(zip(headers.keys(), headers.values()))
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r = self._opener.open(url)
if r.getcode() == 200:
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with open(path, 'w') as fd:
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fd.write(r.read())
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if (ox.sha1sum(path) != sha1):
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logger.error('invalid update!')
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os.unlink(path)
return False
else:
return False
def upload(self, items):
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logger.debug('add items to %s\'s inbox: %s', self.user_id, items)
r = self.request('upload', items)
return bool(r)
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class Nodes(Thread):
_nodes = {}
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local = None
_pulling = False
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def __init__(self):
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self._q = Queue()
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with db.session():
for u in user.models.User.query.filter_by(peered=True):
self.queue('add', u.id)
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get_peer(u.id)
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for u in user.models.User.query.filter_by(queued=True):
logger.debug('adding queued node... %s', u.id)
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self.queue('add', u.id, True)
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self.local = LocalNodes()
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self._pullcb = PeriodicCallback(self.pull, settings.server['pull_interval'])
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state.main.add_callback(self.pullcb.start)
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Thread.__init__(self)
self.daemon = True
self.start()
def run(self):
library.sync_db()
self.queue('pull')
while not state.shutdown:
args = self._q.get()
if args:
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logger.debug('processing nodes queue: next: "%s", %s entries in queue', args[0], self._q.qsize())
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if args[0] == 'add':
self._add(*args[1:])
elif args[0] == 'pull':
self._pull()
else:
self._call(*args)
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def queue(self, *args):
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if args:
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logger.debug('queue "%s", %s entries in queue', args, self._q.qsize())
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self._q.put(list(args))
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def peer_queue(self, peer, action, *args):
if peer not in self._nodes:
self._add(peer)
self._nodes[peer].queue(action, *args)
def is_online(self, id):
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return id in self._nodes and self._nodes[id].is_online()
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def download(self, id, item):
return id in self._nodes and self._nodes[id].download(item)
def download_preview(self, id, item):
return id in self._nodes and \
self._nodes[id].is_online() and \
self._nodes[id].download_preview(item)
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def _call(self, target, action, *args):
if target == 'all':
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nodes = list(self._nodes.values())
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elif target == 'peered':
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nodes = [n for n in list(self._nodes.values()) if n.user.peered]
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elif target == 'online':
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nodes = [n for n in list(self._nodes.values()) if n.online]
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else:
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if target not in self._nodes:
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self._add(target)
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nodes = [self._nodes[target]]
for node in nodes:
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node._call(action, *args)
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def _add(self, user_id, send_response=False):
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if user_id not in self._nodes:
from user.models import User
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with db.session():
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User.get_or_create(user_id)
self._nodes[user_id] = Node(self, user_id)
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else:
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self._nodes[user_id].ping()
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if send_response:
self._nodes[user_id].send_response()
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def pull(self):
if not self._pulling:
self.queue('pull')
def _pull(self):
if not state.sync_enabled or settings.preferences.get('downloadRate') == 0:
return
if state.activity and state.activity.get('activity') == 'import':
return
self._pulling = True
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if state.shutdown:
return
users = []
with db.session():
from user.models import User
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for u in User.query.filter(User.id != settings.USER_ID).filter_by(peered=True).all():
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users.append(u.json(['id', 'index', 'name']))
users.sort(key=user_sort_key)
for u in users:
if state.shutdown:
break
node = self._nodes.get(u['id'])
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if node and node.is_online():
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node.pullChanges()
self._pulling = False
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def join(self):
self._q.put(None)
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for node in list(self._nodes.values()):
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node.join()
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if self.local:
self.local.close()
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return super().join(1)
def publish_node():
update_online()
state._online = PeriodicCallback(update_online, 60000)
state._online.start()
def update_online():
online = state.tor and state.tor.is_online()
if online != state.online:
state.online = online
trigger_event('status', {
'id': settings.USER_ID,
'online': state.online
})
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if state.online:
for node in list(state.nodes._nodes.values()):
node.trigger_status()