Neil Booth
10 years ago
14 changed files with 160 additions and 321 deletions
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#!/usr/bin/env python |
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# |
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# Electrum - lightweight Bitcoin client |
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# Copyright (C) 2014 Thomas Voegtlin |
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# |
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# This program is free software: you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation, either version 3 of the License, or |
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# (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program. If not, see <http://www.gnu.org/licenses/>. |
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import sys |
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import traceback |
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import threading |
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import Queue |
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import util |
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from network import Network, serialize_proxy, serialize_server |
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from simple_config import SimpleConfig |
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class NetworkProxy(util.DaemonThread): |
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def __init__(self, socket, config=None): |
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if config is None: |
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config = {} # Do not use mutables as default arguments! |
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util.DaemonThread.__init__(self) |
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self.config = SimpleConfig(config) if type(config) == type({}) else config |
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self.message_id = 0 |
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self.unanswered_requests = {} |
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self.subscriptions = {} |
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self.debug = False |
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self.lock = threading.Lock() |
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self.callbacks = {} |
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if socket: |
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self.pipe = util.SocketPipe(socket) |
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self.network = None |
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else: |
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self.pipe = util.QueuePipe() |
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self.network = Network(self.pipe, config) |
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self.network.start() |
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for key in ['fee','status','banner','updated','servers','interfaces']: |
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value = self.network.get_status_value(key) |
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self.pipe.get_queue.put({'method':'network.status', 'params':[key, value]}) |
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# status variables |
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self.status = 'unknown' |
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self.servers = {} |
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self.banner = '' |
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self.blockchain_height = 0 |
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self.server_height = 0 |
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self.interfaces = [] |
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# value returned by estimatefee |
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self.fee = None |
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def run(self): |
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while self.is_running(): |
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self.run_jobs() # Synchronizer and Verifier |
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try: |
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response = self.pipe.get() |
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except util.timeout: |
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continue |
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if response is None: |
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break |
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# Protect against ill-formed or malicious server responses |
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try: |
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self.process(response) |
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except: |
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traceback.print_exc(file=sys.stderr) |
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self.trigger_callback('stop') |
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if self.network: |
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self.network.stop() |
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self.print_error("stopped") |
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def process(self, response): |
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if self.debug: |
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self.print_error("<--", response) |
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if response.get('method') == 'network.status': |
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key, value = response.get('params') |
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if key == 'status': |
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self.status = value |
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elif key == 'banner': |
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self.banner = value |
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elif key == 'fee': |
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self.fee = value |
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elif key == 'updated': |
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self.blockchain_height, self.server_height = value |
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elif key == 'servers': |
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self.servers = value |
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elif key == 'interfaces': |
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self.interfaces = value |
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if key in ['status', 'updated']: |
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self.trigger_callback(key) |
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else: |
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self.trigger_callback(key, (value,)) |
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return |
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msg_id = response.get('id') |
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result = response.get('result') |
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error = response.get('error') |
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if msg_id is not None: |
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with self.lock: |
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method, params, callback = self.unanswered_requests.pop(msg_id) |
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else: |
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method = response.get('method') |
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params = response.get('params') |
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with self.lock: |
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for k,v in self.subscriptions.items(): |
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if (method, params) in v: |
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callback = k |
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break |
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else: |
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self.print_error("received unexpected notification", |
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method, params) |
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return |
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r = {'method':method, 'params':params, 'result':result, |
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'id':msg_id, 'error':error} |
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callback(r) |
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def send(self, messages, callback): |
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"""return the ids of the requests that we sent""" |
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# detect subscriptions |
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sub = [] |
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for message in messages: |
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m, v = message |
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if m[-10:] == '.subscribe': |
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sub.append(message) |
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if sub: |
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with self.lock: |
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if self.subscriptions.get(callback) is None: |
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self.subscriptions[callback] = [] |
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for message in sub: |
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if message not in self.subscriptions[callback]: |
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self.subscriptions[callback].append(message) |
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with self.lock: |
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requests = [] |
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ids = [] |
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for m in messages: |
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method, params = m |
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request = { 'id':self.message_id, 'method':method, 'params':params } |
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self.unanswered_requests[self.message_id] = method, params, callback |
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ids.append(self.message_id) |
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requests.append(request) |
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if self.debug: |
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self.print_error("-->", request) |
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self.message_id += 1 |
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self.pipe.send_all(requests) |
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return ids |
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def synchronous_get(self, requests, timeout=100000000): |
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queue = Queue.Queue() |
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ids = self.send(requests, queue.put) |
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id2 = ids[:] |
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res = {} |
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while ids: |
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r = queue.get(True, timeout) |
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_id = r.get('id') |
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ids.remove(_id) |
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if r.get('error'): |
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raise BaseException(r.get('error')) |
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result = r.get('result') |
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res[_id] = r.get('result') |
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out = [] |
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for _id in id2: |
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out.append(res[_id]) |
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return out |
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def get_servers(self): |
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return self.servers |
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def get_interfaces(self): |
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return self.interfaces |
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def get_local_height(self): |
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return self.blockchain_height |
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def get_server_height(self): |
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return self.server_height |
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def is_connected(self): |
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return self.status == 'connected' |
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def is_connecting(self): |
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return self.status == 'connecting' |
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def is_up_to_date(self): |
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return self.unanswered_requests == {} |
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def get_parameters(self): |
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return self.synchronous_get([('network.get_parameters', [])])[0] |
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def set_parameters(self, host, port, protocol, proxy, auto_connect): |
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proxy_str = serialize_proxy(proxy) |
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server_str = serialize_server(host, port, protocol) |
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self.config.set_key('auto_connect', auto_connect, False) |
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self.config.set_key("proxy", proxy_str, False) |
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self.config.set_key("server", server_str, True) |
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# abort if changes were not allowed by config |
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if self.config.get('server') != server_str or self.config.get('proxy') != proxy_str: |
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return |
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return self.synchronous_get([('network.set_parameters', (host, port, protocol, proxy, auto_connect))])[0] |
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def stop_daemon(self): |
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return self.send([('daemon.stop',[])], None) |
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def register_callback(self, event, callback): |
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with self.lock: |
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if not self.callbacks.get(event): |
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self.callbacks[event] = [] |
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self.callbacks[event].append(callback) |
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def trigger_callback(self, event, params=()): |
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with self.lock: |
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callbacks = self.callbacks.get(event,[])[:] |
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if callbacks: |
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[callback(*params) for callback in callbacks] |
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