Give helpful error message when missing protocol

meilisearch/_httprequests.py

@@ -80,6 +80,16 @@ def send_request(
             raise MeilisearchTimeoutError(str(err)) from err
         except requests.exceptions.ConnectionError as err:
             raise MeilisearchCommunicationError(str(err)) from err
+        except requests.exceptions.InvalidSchema as err:
+            if "://" not in self.config.url:
+                raise MeilisearchCommunicationError(
+                    f"""
+                    Invalid URL {self.config.url}, no scheme/protocol supplied.
+                    Did you mean https://{self.config.url}?
+                    """
+                ) from err
+
+            raise MeilisearchCommunicationError(str(err)) from err
 
     def get(self, path: str) -> Any:
         return self.send_request(requests.get, path)

tests/errors/test_communication_error_meilisearch.py

@@ -17,3 +17,12 @@ def test_meilisearch_communication_error_host(mock_post):
     client = meilisearch.Client("http://wrongurl:1234", MASTER_KEY)
     with pytest.raises(MeilisearchCommunicationError):
         client.create_index("some_index")
+
+
+@patch("requests.post")
+def test_meilisearch_communication_error_no_protocol(mock_post):
+    mock_post.configure_mock(__name__="post")
+    mock_post.side_effect = requests.exceptions.InvalidSchema()
+    client = meilisearch.Client("localhost:7700", MASTER_KEY)
+    with pytest.raises(MeilisearchCommunicationError, match="no scheme/protocol supplied."):
+        client.create_index("some_index")