First support for IPv6 and multiple interfaces

radicale.py

@@ -38,6 +38,7 @@ arguments.
 import os
 import sys
 import optparse
+import threading, signal
 
 import radicale
 
@@ -97,8 +98,40 @@ if options.daemon:
         sys.exit()
     sys.stdout = sys.stderr = open(os.devnull, "w")
 
+def exit (servers):
+    """Cleanly shutdown all servers.
+    
+    Might be called multiple times."""
+    for s in servers:
+        s.shutdown()
+
 # Launch calendar server
 server_class = radicale.HTTPSServer if options.ssl else radicale.HTTPServer
-server = server_class(
+servers = []
-    (options.host, options.port), radicale.CalendarHTTPHandler)
+threads = []
-server.serve_forever()
+
+for host in (x.strip() for x in options.host.split(',')):
+    try:
+        server = server_class(
+            (host, options.port), radicale.CalendarHTTPHandler)
+        servers.append(server)
+        
+        t = threading.Thread(target = server.serve_forever)
+        threads.append(t)
+        t.start()
+    except:
+        exit(servers)
+        raise
+
+# clean exit on SIGTERM
+signal.signal(signal.SIGTERM, lambda *a: exit(servers))
+
+try:
+    while threads:
+        threads[0].join(1) # try one second
+        if threading.active_count() <= len(threads): # one thread died
+            break
+except KeyboardInterrupt:
+    pass
+finally:
+    exit(servers)

radicale/__init__.py

@@ -80,9 +80,24 @@ class HTTPServer(server.HTTPServer):
 
     # Maybe a Pylint bug, ``__init__`` calls ``server.HTTPServer.__init__``
     # pylint: disable=W0231
-    def __init__(self, address, handler):
+    def __init__(self, address, handler, bind_and_activate = True):
         """Create server."""
-        server.HTTPServer.__init__(self, address, handler)
+        self.use_ipv6 = ':' in address[0]
+
+        if self.use_ipv6:
+            self.address_family = socket.AF_INET6
+
+        # call superclass, but do NOT bind and activate, as we might change socketopts
+        server.HTTPServer.__init__(self, address, handler, bind_and_activate = False)
+
+        if self.use_ipv6:
+            # only allow IPv6 connections to the IPv6 socket
+            self.socket.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, 1)
+
+        if bind_and_activate:
+            self.server_bind()
+            self.server_activate()
+
         self.acl = acl.load()
     # pylint: enable=W0231
 
@@ -91,22 +106,24 @@ class HTTPSServer(HTTPServer):
     """HTTPS server."""
     PROTOCOL = "https"
 
-    def __init__(self, address, handler):
+    def __init__(self, address, handler, bind_and_activate = True):
         """Create server by wrapping HTTP socket in an SSL socket."""
         # Fails with Python 2.5, import if needed
         # pylint: disable=F0401
         import ssl
         # pylint: enable=F0401
 
-        HTTPServer.__init__(self, address, handler)
+        HTTPServer.__init__(self, address, handler, False)
         self.socket = ssl.wrap_socket(
-            socket.socket(self.address_family, self.socket_type),
+            self.socket, # we can use this, it is not bound yet
             server_side=True,
             certfile=config.get("server", "certificate"),
             keyfile=config.get("server", "key"),
             ssl_version=ssl.PROTOCOL_SSLv23)
-        self.server_bind()
+
-        self.server_activate()
+        if bind_and_activate:
+            self.server_bind()
+            self.server_activate()
 
 
 class CalendarHTTPHandler(server.BaseHTTPRequestHandler):