Move request logic to separate method

As preparations for calling other endpoints as well.

cpsms/cpsms.py

@@ -2,10 +2,11 @@
 
 import base64
 import getopt
+from http.client import HTTPResponse
 import json
 import re
 from urllib import error, parse, request
-from typing import Any, Dict, Tuple
+from typing import Any, Dict, Optional, Tuple
 
 
 class Gateway:
@@ -56,6 +57,20 @@ class Gateway:
         if gateway_base_url:
             self.gateway_base_url = gateway_base_url
 
+    def request(self, path: str, data: Optional[dict] = None) -> dict:
+        """Make a request to the gateway and return the response data."""
+        # Construct the authentication header.
+        auth_header = "{}:{}".format(self.username, self.password)
+        auth_header = base64.b64encode(auth_header.encode()).decode()
+
+        # Prepare and make the request.
+        http_request = request.Request(self.gateway_base_url + path, data=data)
+        http_request.add_header("Authorization", "Basic {}".format(auth_header))
+        response = request.urlopen(http_request)
+
+        # Parse and return the response data.
+        return json.loads(response.read().decode())
+
     def send(self, to: str = None, message: str = None) -> Tuple[bool, str]:
         """
         Send a message to a recipient.
@@ -100,12 +115,4 @@ class Gateway:
         options["flash"] = int(options["flash"])
         data = json.dumps(options).encode()
 
-        # Prepare authentication.
-        auth_header = "{}:{}".format(self.username, self.password)
-        auth_header = base64.b64encode(auth_header.encode()).decode()
-
-        http_request = request.Request(self.gateway_base_url + "/v2/send", data=data)
-        http_request.add_header("Authorization", "Basic {}".format(auth_header))
-        response = request.urlopen(http_request)
-
-        return json.loads(response.read().decode())
+        return self.request("/v2/send", data=data)