exit wait_until_connected() when all servers have been tried
[electrum-nvc.git] / lib / network.py
index 2112778..fdcd755 100644 (file)
@@ -7,24 +7,21 @@ from blockchain import Blockchain
 DEFAULT_PORTS = {'t':'50001', 's':'50002', 'h':'8081', 'g':'8082'}
 
 DEFAULT_SERVERS = {
-    #'the9ull.homelinux.org': {'h': '8082', 't': '50001'},
-    'electrum.coinwallet.me': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
+    #'electrum.coinwallet.me': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
     'electrum.hachre.de': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
-    #'electrum.koh.ms': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
     'electrum.novit.ro': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
     'electrum.stepkrav.pw': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
     #'ecdsa.org': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
-    #'electrum.mooo.com': {'h': '8081', 't': '50001'},
-    #'electrum.bitcoins.sk': {'h': '8081', 's': '50002', 't': '50001', 'g': '8'},
     'electrum.no-ip.org': {'h': '80', 's': '50002', 't': '50001', 'g': '443'},
-    'electrum.drollette.com': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
+    'electrum.drollette.com': {'h': '5000', 's': '50002', 't': '50001', 'g': '8082'},
     'btc.it-zone.org': {'h': '80', 's': '110', 't': '50001', 'g': '443'},
-    #'electrum.yacoin.com': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
+    'btc.medoix.com': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
+    'electrum.stupidfoot.com': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
+    #'electrum.pdmc.net': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
     'electrum.be': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'}
 }
 
 
-NUM_SERVERS = 8
 
 
 def filter_protocol(servers, p):
@@ -35,26 +32,34 @@ def filter_protocol(servers, p):
     return l
     
 
-def pick_random_server():
-    return random.choice( filter_protocol(DEFAULT_SERVERS,'s') )
+def pick_random_server(p='s'):
+    return random.choice( filter_protocol(DEFAULT_SERVERS,p) )
 
+from simple_config import SimpleConfig
 
 class Network(threading.Thread):
 
-    def __init__(self, config):
+    def __init__(self, config = {}):
         threading.Thread.__init__(self)
         self.daemon = True
-        self.config = config
+        self.config = SimpleConfig(config) if type(config) == type({}) else config
         self.lock = threading.Lock()
-        self.blockchain = Blockchain(config, self)
+        self.num_server = 8 if not self.config.get('oneserver') else 0
+        self.blockchain = Blockchain(self.config, self)
         self.interfaces = {}
         self.queue = Queue.Queue()
-        self.default_server = self.config.get('server')
         self.callbacks = {}
+        self.protocol = self.config.get('protocol','s')
+        self.running = False
+
+        # Server for addresses and transactions
+        self.default_server = self.config.get('server')
+        if not self.default_server:
+            self.default_server = pick_random_server(self.protocol)
 
-        self.protocol = 's'
-        self.irc_servers = []                                      # returned by interface (list from irc)
-        self.disconnected_servers = []
+        self.irc_servers = [] # returned by interface (list from irc)
+        self.pending_servers = set([])
+        self.disconnected_servers = set([])
         self.recent_servers = self.config.get('recent_servers',[]) # successful connections
 
         self.banner = ''
@@ -90,10 +95,18 @@ class Network(threading.Thread):
                 if message not in self.subscriptions[callback]:
                     self.subscriptions[callback].append(message)
 
-        if self.interface and self.interface.is_connected:
+        if self.is_connected():
             self.interface.send( messages, callback )
 
 
+    def send(self, messages, callback):
+        if self.is_connected():
+            self.interface.send( messages, callback )
+            return True
+        else:
+            return False
+
+
     def register_callback(self, event, callback):
         with self.lock:
             if not self.callbacks.get(event):
@@ -112,7 +125,7 @@ class Network(threading.Thread):
         choice_list = []
         l = filter_protocol(self.get_servers(), self.protocol)
         for s in l:
-            if s in self.disconnected_servers or s in self.interfaces.keys():
+            if s in self.pending_servers or s in self.disconnected_servers or s in self.interfaces.keys():
                 continue
             else:
                 choice_list.append(s)
@@ -120,7 +133,7 @@ class Network(threading.Thread):
         if not choice_list: 
             if not self.interfaces:
                 # we are probably offline, retry later
-                self.disconnected_servers = []
+                self.disconnected_servers = set([])
             return
         
         server = random.choice( choice_list )
@@ -138,9 +151,10 @@ class Network(threading.Thread):
     def start_interface(self, server):
         if server in self.interfaces.keys():
             return
-        i = interface.Interface({'server':server, 'path':self.config.path, 'proxy':self.proxy})
-        self.interfaces[server] = i
+        i = interface.Interface(server, self.config)
+        self.pending_servers.add(server)
         i.start(self.queue)
+        return i 
 
     def start_random_interface(self):
         server = self.random_server()
@@ -148,46 +162,52 @@ class Network(threading.Thread):
             self.start_interface(server)
 
     def start_interfaces(self):
-        if self.default_server:
-            self.start_interface(self.default_server)
-            self.interface = self.interfaces[self.default_server]
+        self.interface = self.start_interface(self.default_server)
 
-        for i in range(NUM_SERVERS):
+        for i in range(self.num_server):
             self.start_random_interface()
             
-        if not self.interface:
-            self.interface = self.interfaces.values()[0]
-
 
     def start(self, wait=False):
         self.start_interfaces()
         threading.Thread.start(self)
         if wait:
-            self.interface.connect_event.wait()
-            return self.interface.is_connected
-
+            return self.wait_until_connected()
 
     def wait_until_connected(self):
-        while not self.interface:
-            time.sleep(1)
-        self.interface.connect_event.wait()
+        "wait until connection status is known"
+        if self.config.get('auto_cycle'): 
+            # self.random_server() returns None if all servers have been tried
+            while not self.is_connected() and self.random_server():
+                time.sleep(0.1)
+        else:
+            self.interface.connect_event.wait()
 
+        return self.interface.is_connected
 
-    def set_parameters(self, server, proxy, auto_connect):
 
-        self.config.set_key("proxy", proxy, True)
-        self.proxy = proxy
+    def set_parameters(self, host, port, protocol, proxy, auto_connect):
 
         self.config.set_key('auto_cycle', auto_connect, True)
-
+        self.config.set_key("proxy", proxy, True)
+        self.config.set_key("protocol", protocol, True)
+        server = ':'.join([ host, port, protocol ])
         self.config.set_key("server", server, True)
 
+        if self.proxy != proxy or self.protocol != protocol:
+            self.proxy = proxy
+            self.protocol = protocol
+            for i in self.interfaces.values(): i.stop()
+            if auto_connect:
+                #self.interface = None
+                return
+
         if auto_connect:
-            if not self.interface:
+            if not self.interface.s_connected:
                 self.switch_to_random_interface()
             else:
                 if self.server_lag > 0:
-                    self.interface.stop()
+                    self.stop_interface()
         else:
             self.set_server(server)
 
@@ -197,21 +217,33 @@ class Network(threading.Thread):
             self.switch_to_interface(random.choice(self.interfaces.values()))
 
     def switch_to_interface(self, interface):
-        print_error("switching to", interface.server)
+        assert not self.interface.is_connected
+        server = interface.server
+        print_error("switching to", server)
         self.interface = interface
-        self.server_lag = self.blockchain.height - self.heights[self.interface.server]
-        self.config.set_key('server', self.interface.server, False)
+        h =  self.heights.get(server)
+        if h:
+            self.server_lag = self.blockchain.height() - h
+        self.config.set_key('server', server, False)
+        self.default_server = server
         self.send_subscriptions()
         self.trigger_callback('connected')
 
 
+    def stop_interface(self):
+        self.interface.stop() 
+        #self.interface = None
+
     def set_server(self, server):
-        if self.default_server == server and self.interface:
+        if self.default_server == server and self.interface.is_connected:
+            return
+
+        if self.protocol != server.split(':')[2]:
             return
 
         # stop the interface in order to terminate subscriptions
-        if self.interface:
-            self.interface.stop() 
+        if self.interface.is_connected:
+            self.stop_interface()
 
         # notify gui
         self.trigger_callback('disconnecting')
@@ -222,8 +254,7 @@ class Network(threading.Thread):
         if server in self.interfaces.keys():
             self.switch_to_interface( self.interfaces[server] )
         else:
-            self.start_interface(server)
-            self.interface = self.interfaces[server]
+            self.interface = self.start_interface(server)
         
 
     def add_recent_server(self, i):
@@ -245,6 +276,8 @@ class Network(threading.Thread):
                     print_error( "Server is lagging", blockchain_height, h)
                     if self.config.get('auto_cycle'):
                         self.set_server(i.server)
+            else:
+                print_error('no height for main interface')
         
         self.trigger_callback('updated')
 
@@ -257,13 +290,16 @@ class Network(threading.Thread):
 
         while self.is_running():
             try:
-                i = self.queue.get(timeout = 30)
+                i = self.queue.get(timeout = 30 if self.interfaces else 3)
             except Queue.Empty:
-                if len(self.interfaces) < NUM_SERVERS:
+                if len(self.interfaces) < self.num_server:
                     self.start_random_interface()
                 continue
 
+            self.pending_servers.remove(i.server)
             if i.is_connected:
+                #if i.server in self.interfaces: raise
+                self.interfaces[i.server] = i
                 self.add_recent_server(i)
                 i.send([ ('blockchain.headers.subscribe',[])], self.on_header)
                 if i == self.interface:
@@ -271,28 +307,33 @@ class Network(threading.Thread):
                     self.send_subscriptions()
                     self.trigger_callback('connected')
             else:
-                self.disconnected_servers.append(i.server)
-                self.interfaces.pop(i.server)
+                self.disconnected_servers.add(i.server)
+                if i.server in self.interfaces:
+                    self.interfaces.pop(i.server)
                 if i.server in self.heights:
                     self.heights.pop(i.server)
                 if i == self.interface:
-                    self.interface = None
+                    #self.interface = None
                     self.trigger_callback('disconnected')
 
-            if self.interface is None and self.config.get('auto_cycle'):
+            if not self.interface.is_connected and self.config.get('auto_cycle'):
                 self.switch_to_random_interface()
 
 
     def on_header(self, i, r):
         result = r.get('result')
         if not result: return
-        self.heights[i.server] = result.get('block_height')
+        height = result.get('block_height')
+        self.heights[i.server] = height
+        # notify blockchain about the new height
         self.blockchain.queue.put((i,result))
 
         if i == self.interface:
-            self.server_lag = self.blockchain.height - self.heights[i.server]
-            if self.server_lag:
-                print "on_header: lag", self.server_lag
+            self.server_lag = self.blockchain.height() - height
+            if self.server_lag > 1 and self.config.get('auto_cycle'):
+                print_error( "Server lagging, stopping interface")
+                self.stop_interface()
+
             self.trigger_callback('updated')
 
 
@@ -358,7 +399,7 @@ class Network(threading.Thread):
                     if pruning_level == '': pruning_level = '0'
             try: 
                 is_recent = float(version)>=float(PROTOCOL_VERSION)
-            except:
+            except Exception:
                 is_recent = False
 
             if out and is_recent: