Pass through more info from nginx and log it, to help me figure out who's using Spothole and contact them about upcoming API changes. Also an enabler for #101.

server/webserver.py

@@ -108,8 +108,9 @@ class WebServer:
 
         app = tornado.web.Application(api_routes + ui_routes + misc_routes,
                                       template_path=os.path.join(_HERE, "../templates"),
+                                      log_function=request_log,
                                       debug=False)
-        app.listen(self._port)
+        app.listen(self._port, xheaders=True)
         logging.info("Web server running on port " + str(WEB_SERVER_PORT))
         await self._shutdown_event.wait()
 
@@ -162,3 +163,22 @@ class WebServer:
                 # Probably got deleted already on another thread
                 pass
         pass
+
+def request_log(handler):
+    """Custom log function to provide more data about requests."""
+
+    if handler.get_status() < 500:
+        log_method = logging.info
+    else:
+        log_method = logging.warning
+
+    request = handler.request
+    client_ip = request.remote_ip
+    referrer = request.headers.get("Referer", "-")
+    user_agent = request.headers.get("User-Agent", "-")
+
+    log_method(
+        f'{client_ip} - "{request.method} {request.uri}" '
+        f'{handler.get_status()} {request.request_time():.2f}ms | '
+        f'Ref: {referrer} | UA: {user_agent}'
+    )