webhooks: Convert to Python3 string encoding

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

klippy/webhooks.py

@@ -14,15 +14,17 @@ REQUEST_LOG_SIZE = 20
 #
 # https://stackoverflow.com/questions/956867/
 #
-def byteify(data, ignore_dicts=False):
-    if isinstance(data, unicode):
-        return data.encode('utf-8')
-    if isinstance(data, list):
-        return [byteify(i, True) for i in data]
-    if isinstance(data, dict) and not ignore_dicts:
-        return {byteify(k, True): byteify(v, True)
-                for k, v in data.items()}
-    return data
+json_loads_byteify = None
+if sys.version_info.major < 3:
+    def json_loads_byteify(data, ignore_dicts=False):
+        if isinstance(data, unicode):
+            return data.encode('utf-8')
+        if isinstance(data, list):
+            return [json_loads_byteify(i, True) for i in data]
+        if isinstance(data, dict) and not ignore_dicts:
+            return {json_loads_byteify(k, True): json_loads_byteify(v, True)
+                    for k, v in data.items()}
+        return data
 
 class WebRequestError(gcode.CommandError):
     def __init__(self, message,):
@@ -40,7 +42,7 @@ class WebRequest:
     error = WebRequestError
     def __init__(self, client_conn, request):
         self.client_conn = client_conn
-        base_request = json.loads(request, object_hook=byteify)
+        base_request = json.loads(request, object_hook=json_loads_byteify)
         if type(base_request) != dict:
             raise ValueError("Not a top-level dictionary")
         self.id = base_request.get('id', None)
@@ -170,7 +172,7 @@ class ClientConnection:
         self.sock = sock
         self.fd_handle = self.reactor.register_fd(
             self.sock.fileno(), self.process_received)
-        self.partial_data = self.send_buffer = ""
+        self.partial_data = self.send_buffer = b""
         self.is_sending_data = False
         self.set_client_info("?", "New connection")
         self.request_log = collections.deque([], REQUEST_LOG_SIZE)
@@ -216,14 +218,14 @@ class ClientConnection:
             # If bad file descriptor allow connection to be
             # closed by the data check
             if e.errno == errno.EBADF:
-                data = ''
+                data = b""
             else:
                 return
-        if data == '':
+        if not data:
             # Socket Closed
             self.close()
             return
-        requests = data.split('\x03')
+        requests = data.split(b'\x03')
         requests[0] = self.partial_data + requests[0]
         self.partial_data = requests.pop()
         for req in requests:
@@ -255,7 +257,8 @@ class ClientConnection:
         self.send(result)
 
     def send(self, data):
-        self.send_buffer += json.dumps(data, separators=(',', ':')) + "\x03"
+        jmsg = json.dumps(data, separators=(',', ':'))
+        self.send_buffer += jmsg.encode() + b"\x03"
         if not self.is_sending_data:
             self.is_sending_data = True
             self.reactor.register_callback(self._do_send)