Return back removed public HttpHook's method (#37738)

airflow/providers/http/hooks/http.py

@@ -268,6 +268,10 @@ def run_with_advanced_retry(self, _retry_args: dict[Any, Any], *args: Any, **kwa
         # TODO: remove ignore type when https://github.com/jd/tenacity/issues/428 is resolved
         return self._retry_obj(self.run, *args, **kwargs)  # type: ignore
 
+    def url_from_endpoint(self, endpoint: str | None) -> str:
+        """Combine base url with endpoint."""
+        return _url_from_endpoint(base_url=self.base_url, endpoint=endpoint)
+
     def test_connection(self):
         """Test HTTP Connection."""
         try:

tests/providers/http/hooks/test_http.py

@@ -497,6 +497,18 @@ def test_keep_alive_disabled(self):
             tcp_keep_alive_send.assert_not_called()
             http_send.assert_called()
 
+    @pytest.mark.parametrize(
+        "base_url, endpoint, expected_url",
+        [
+            pytest.param("https://example.org", "/v1/test", "https://example.org/v1/test", id="both-set"),
+            pytest.param("", "http://foo/bar/v1/test", "http://foo/bar/v1/test", id="only-endpoint"),
+        ],
+    )
+    def test_url_from_endpoint(self, base_url: str, endpoint: str, expected_url: str):
+        hook = HttpHook()
+        hook.base_url = base_url
+        assert hook.url_from_endpoint(endpoint) == expected_url
+
 
 class TestHttpAsyncHook:
     @pytest.mark.asyncio