ThomasV
12 years ago
10 changed files with 332 additions and 258 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 socket |
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import time |
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import sys |
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import os |
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import threading |
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import traceback |
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import json |
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import Queue |
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from network import Network |
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from util import print_error, print_stderr |
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from simple_config import SimpleConfig |
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from daemon import parse_json, NetworkServer, DAEMON_PORT |
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class NetworkProxy(threading.Thread): |
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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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threading.Thread.__init__(self) |
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self.config = SimpleConfig(config) if type(config) == type({}) else config |
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self.socket = socket |
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self.socket.settimeout(0.1) |
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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.pending_transactions_for_notifications = [] |
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self.banner = '' |
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self.callbacks = {} |
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self.running = True |
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self.daemon = True |
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def is_running(self): |
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return self.running |
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def run(self): |
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# read responses and trigger callbacks |
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message = '' |
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while self.is_running(): |
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try: |
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data = self.socket.recv(1024) |
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except socket.timeout: |
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continue |
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except: |
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data = '' |
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if not data: |
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break |
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message += data |
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while True: |
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response, message = parse_json(message) |
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if response is not None: |
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self.process(response) |
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else: |
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break |
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# fixme: server does not detect if we don't call shutdown |
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self.socket.shutdown(2) |
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self.socket.close() |
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print_error("NetworkProxy thread terminating") |
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def process(self, response): |
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if self.debug: |
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print_error("<--", response) |
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if response.get('method') == 'network.subscribe': |
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status = response.get('status') |
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self.trigger_callback(status) |
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return |
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msg_id = response.get('id') |
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with self.lock: |
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method, params, callback = self.unanswered_requests.pop(msg_id) |
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result = response.get('result') |
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callback(None, {'method':method, 'params':params, 'result':result, 'id':msg_id}) |
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def subscribe(self, messages, callback): |
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# detect if it is a subscription |
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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 messages: |
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if message not in self.subscriptions[callback]: |
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self.subscriptions[callback].append(message) |
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self.send( messages, callback ) |
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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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with self.lock: |
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out = '' |
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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 = json.dumps( { '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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if self.debug: |
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print_error("-->", request) |
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self.message_id += 1 |
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out += request + '\n' |
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while out: |
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sent = self.socket.send( out ) |
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out = out[sent:] |
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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, lambda i,x: queue.put(x)) |
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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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if _id in ids: |
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ids.remove(_id) |
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res[_id] = r.get('result') |
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else: |
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raise |
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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.synchronous_get([('network.get_servers',[])])[0] |
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def get_header(self, height): |
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return self.synchronous_get([('network.get_header',[height])])[0] |
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def get_local_height(self): |
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return self.synchronous_get([('network.get_local_height',[])])[0] |
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def is_connected(self): |
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return self.synchronous_get([('network.is_connected',[])])[0] |
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def is_up_to_date(self): |
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return self.synchronous_get([('network.is_up_to_date',[])])[0] |
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def main_server(self): |
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return self.synchronous_get([('network.main_server',[])])[0] |
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def stop(self): |
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self.running = False |
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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): |
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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() for callback in callbacks] |
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print_error("trigger_callback", event, len(callbacks)) |
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