Try to connect multiple times (with different servers if any)

nemubot/__main__.py

@@ -155,12 +155,18 @@ def main():
 
         # Preset each server in this file
         for server in config.servers:
-            srv = server.server(config)
             # Add the server in the context
+            for i in [0,1,2,3]:
+                srv = server.server(config, trynb=i)
+                try:
                     if context.add_server(srv):
                         logger.info("Server '%s' successfully added.", srv.name)
                     else:
                         logger.error("Can't add server '%s'.", srv.name)
+                except:
+                    logger.error("Unable to connect to '%s'.", srv.name)
+                    continue
+                break
 
         # Load module and their configuration
         for mod in config.modules:

nemubot/config/server.py

@@ -33,7 +33,7 @@ class Server:
             return True
 
 
-    def server(self, parent):
+    def server(self, parent, trynb=0):
         from nemubot.server import factory
 
         for a in ["nick", "owner", "realname", "encoding"]:
@@ -42,4 +42,4 @@ class Server:
 
         self.caps += parent.caps
 
-        return factory(self.uri, caps=self.caps, channels=self.channels, **self.args)
+        return factory(self.uri, caps=self.caps, channels=self.channels, trynb=trynb, **self.args)

nemubot/server/socket.py

@@ -79,8 +79,9 @@ class _Socket(AbstractServer):
 
 class SocketServer(_Socket):
 
-    def __init__(self, host, port, bind=None, **kwargs):
-        (family, type, proto, canonname, self._sockaddr) = socket.getaddrinfo(host, port, proto=socket.IPPROTO_TCP)[0]
+    def __init__(self, host, port, bind=None, trynb=0, **kwargs):
+        destlist = socket.getaddrinfo(host, port, proto=socket.IPPROTO_TCP)
+        (family, type, proto, canonname, self._sockaddr) = destlist[trynb%len(destlist)]
 
         super().__init__(fdClass=socket.socket, family=family, type=type, proto=proto, **kwargs)