Improve http get/post with internal retry

plugin.py

@@ -195,14 +195,12 @@ class BasePlugin:
                 'X-Gizwits-Application-Id': 'c70a66ff039d41b4a220e198b0fcc8b3',
             }
             data = '{ "username": "'+user+'", "password": "'+password+'", "lang": "en" }'
+            time.sleep(0.5)
+            url = 'https://euapi.gizwits.com/app/login'
             try:
-                time.sleep(0.5)
+                response = http("post", url, headers, data)
-                url = 'https://euapi.gizwits.com/app/login'
-                response = requests.post(url, headers=headers, data=data, timeout=self._HTTP_TIMEOUT).json()
             except Exception as exc:
                 Domoticz.Error("Cannot open connection to Heatzy API to get the token: " + str(exc))
-                #Domoticz.Error("URL: " + str(url))
-                #Domoticz.Error("Headers: " + str(headers))
                 Domoticz.Error("Data: " + str(data))
                 #Decrease retry
                 self.retry = self.retry - 1
@@ -244,7 +242,7 @@ class BasePlugin:
             params = (('limit', '20'), ('skip', '0'),)
             url = 'https://euapi.gizwits.com/app/bindings'
             try:
-                response = requests.get(url, headers=headers, params=params, timeout=self._HTTP_TIMEOUT).json()
+                response = http("get", url, headers, params=params)
             except Exception as exc:
                 Domoticz.Error("Cannot open connection to Heatzy API to get the device id: " + str(exc))
                 #Domoticz.Error("URL: " + str(url))
@@ -293,7 +291,7 @@ class BasePlugin:
 
             url = f"https://euapi.gizwits.com/app/devdata/{did}/latest"
             try:
-                response = requests.get(url, headers=headers, timeout=self._HTTP_TIMEOUT).json()
+                response = http("get", url, headers)
             except Exception as exc:
                 message = f"Cannot open connection to Heatzy API to get the mode for {alias} (retry={self.retry}): {exc}"
                 if self.retry <= 0:
@@ -398,7 +396,7 @@ class BasePlugin:
             self.did[deviceid]["command_at"] = time.time()
             url = f"https://euapi.gizwits.com/app/control/{did}"
             try:
-                response = requests.post(url, headers=headers, data=data, timeout=self._HTTP_TIMEOUT).json()
+                response = http("post", url, headers, data)
             except Exception as exc:
                 Domoticz.Error("Cannot open connection to Heatzy API to set the mode: " + str(exc))
                 #Domoticz.Error("URL: " + str(url))
@@ -461,6 +459,33 @@ class BasePlugin:
             Domoticz.Status("Reset retry counter")
             self.retry = self._MAX_RETRY_PER_DEVICE * len(self.did)
 
+def http(mode:str, url:str, headers:dict, data:str="", params:tuple|None=None)->dict:
+    """HTTP GET/POST helper function"""
+    retries = 3
+    timeout = 10
+
+    retry = 0
+    while True:
+        try:
+            if mode.upper() == "GET":
+                if data != "":
+                    raise ValueError("'data' shall be empty.")
+                response = requests.get(url, headers=headers, params=params, timeout=timeout).json()
+                Domoticz.Debug("HTTP GET Response:" + str(response))
+            else:
+                if params is not None:
+                    raise ValueError("'params' shall be None.")
+                response = requests.post(url, headers=headers, data=data, timeout=timeout).json()
+                Domoticz.Debug("HTTP POST Response:" + str(response))
+            break
+        except Exception:
+            retry = retry + 1
+            if retry >= retries:
+                raise
+            time.sleep(0.5)
+
+    return response
+
 _plugin = BasePlugin()
 
 def onStart():  #NOSONAR #pylint: disable=invalid-name