Add requests functionality to the OGServer class

These functions will be used to make HTTP GET and POST requests to the
OGServer.

ogcp/og_server.py

@@ -1,3 +1,4 @@
+import requests
 import json
 
 class OGServer:
@@ -5,6 +6,7 @@ class OGServer:
         self.ip = ip
         self.port = port
         self.api_token = api_token
+        self._prepare_requests()
 
     def load_config(self, path):
         with open(path, 'r') as f:
@@ -13,3 +15,20 @@ class OGServer:
         self.ip = cfg['ip']
         self.port = cfg['port']
         self.api_token = cfg['api_token']
+        self._prepare_requests()
+
+    def _prepare_requests(self):
+        self.URL = f'http://{self.ip}:{self.port}'
+        self.HEADERS = {'Authorization' : self.api_token}
+
+    def get(self, path, payload=None):
+        r = requests.get(f'{self.URL}{path}',
+                         headers=self.HEADERS,
+                         json=payload)
+        return r
+
+    def post(self, path, payload):
+        r = requests.post(f'{self.URL}{path}',
+                          headers=self.HEADERS,
+                          json=payload)
+        return r