feat: add route option for python swupdate client

if the update server is behind a reverse proxy a route is needed.
The route should be optional and also work with websever without an
additional route.

Usage:
```shell
python ./main.py ./swu.swu 192.168.0.100 80 /update
```

tools/python/swupdateclient/README.md

@@ -21,12 +21,12 @@ pipenv install
 
 ### pip
 ```
-swupdateclient <path-to-swu> <host_name> [port]
+swupdateclient <path-to-swu> <host_name> [port] [route]
 ```
 
 ### pipenv
 ```
-pipenv run swupdateclient <path-to-swu> <host_name> [port]
+pipenv run swupdateclient <path-to-swu> <host_name> [port] [route]
 ```
 
 

tools/python/swupdateclient/swupdateclient/main.py

@@ -56,13 +56,14 @@ def format(self, record):
 class SWUpdater:
     """Python helper class for SWUpdate"""
 
-    url_upload = "http://{}:{}/upload"
-    url_status = "ws://{}:{}/ws"
+    url_upload = "http://{}:{}{}/upload"
+    url_status = "ws://{}:{}{}/ws"
 
-    def __init__(self, path_image, host_name, port=8080, logger=None, log_level=logging.DEBUG):
+    def __init__(self, path_image, host_name, port=8080, route="", logger=None, log_level=logging.DEBUG):
         self._image = path_image
         self._host_name = host_name
         self._port = port
+        self._route = route
         if logger is not None:
             self._logger = logger
         else:
@@ -76,7 +77,7 @@ async def wait_update_finished(self):
         self._logger.info("Waiting for messages on websocket connection")
         try:
             async with websockets.connect(
-                self.url_status.format(self._host_name, self._port)
+                self.url_status.format(self._host_name, self._port, self._route)
             ) as websocket:
                 while True:
                     try:
@@ -112,7 +113,7 @@ async def wait_update_finished(self):
 
     def sync_upload(self, swu_file, timeout):
         return requests.post(
-            self.url_upload.format(self._host_name, self._port),
+            self.url_upload.format(self._host_name, self._port, self._route),
             files={"file": swu_file},
             headers={"Cache-Control": "no-cache"},
             timeout=timeout,
@@ -172,6 +173,13 @@ def client (args: List[str]) -> None:
     parser.add_argument("swu_file", help="Path to swu image")
     parser.add_argument("host_name", help="Host name")
     parser.add_argument("port", help="Port", type=int, default=8080, nargs="?")
+    parser.add_argument(
+        "route",
+        help="Name of the API route (e.g. /ROUTE)",
+        type=str,
+        default="",
+        nargs="?"
+    )
     parser.add_argument(
         "--timeout",
         help="Timeout for the whole swupdate process",
@@ -201,6 +209,7 @@ def client (args: List[str]) -> None:
         args.swu_file,
         args.host_name,
         args.port,
+        args.route,
         log_level=args.log_level.upper())
     updater.update(timeout=args.timeout)