Fix KeyError in rest (#92464)

homeassistant/components/rest/binary_sensor.py

@@ -67,7 +67,7 @@ async def async_setup_platform(
             if isinstance(rest.last_exception, ssl.SSLError):
                 _LOGGER.error(
                     "Error connecting %s failed with %s",
-                    conf[CONF_RESOURCE],
+                    rest.url,
                     rest.last_exception,
                 )
                 return

homeassistant/components/rest/data.py

@@ -50,6 +50,11 @@ class RestData:
         self.last_exception: Exception | None = None
         self.headers: httpx.Headers | None = None
 
+    @property
+    def url(self) -> str:
+        """Get url."""
+        return self._resource
+
     def set_url(self, url: str) -> None:
         """Set url."""
         self._resource = url

homeassistant/components/rest/sensor.py

@@ -71,7 +71,7 @@ async def async_setup_platform(
             if isinstance(rest.last_exception, ssl.SSLError):
                 _LOGGER.error(
                     "Error connecting %s failed with %s",
-                    conf[CONF_RESOURCE],
+                    rest.url,
                     rest.last_exception,
                 )
                 return