umqtt.simple: Add SSL support.

umqtt.simple/umqtt/simple.py

@@ -7,10 +7,13 @@ class MQTTException(Exception):
 
 class MQTTClient:
 
-    def __init__(self, client_id, server, port=1883):
+    def __init__(self, client_id, server, port=0, ssl=False):
+        if port == 0:
+            port = 8883 if ssl else 1883
         self.client_id = client_id
         self.sock = None
         self.addr = socket.getaddrinfo(server, port)[0][-1]
+        self.ssl = ssl
         self.pid = 0
         self.cb = None
 
@@ -34,6 +37,9 @@ class MQTTClient:
     def connect(self, clean_session=True):
         self.sock = socket.socket()
         self.sock.connect(self.addr)
+        if self.ssl:
+            import ussl
+            self.sock = ussl.wrap_socket(self.sock)
         msg = bytearray(b"\x10\0\0\x04MQTT\x04\x02\0\0")
         msg[1] = 10 + 2 + len(self.client_id)
         msg[9] = clean_session << 1