Fix to work with _api_request from Jupyterhub > 3

.pre-commit-config.yaml

@@ -55,7 +55,6 @@ repos:
       # Lint: Checks that non-binary executables have a proper shebang.
       - id: check-executables-have-shebangs
 
-
 # pre-commit.ci config reference: https://pre-commit.ci/#configuration
 ci:
   autoupdate_schedule: monthly

batchspawner/singleuser.py

@@ -1,5 +1,7 @@
 import os
 import sys
+import asyncio
+import json
 
 from runpy import run_path
 from shutil import which
@@ -14,10 +16,12 @@ def main(argv=None):
     hub_auth.client_ca = os.environ.get("JUPYTERHUB_SSL_CLIENT_CA", "")
     hub_auth.certfile = os.environ.get("JUPYTERHUB_SSL_CERTFILE", "")
     hub_auth.keyfile = os.environ.get("JUPYTERHUB_SSL_KEYFILE", "")
-    hub_auth._api_request(
-        method="POST",
-        url=url_path_join(hub_auth.api_url, "batchspawner"),
-        json={"port": port},
+    asyncio.run(
+        hub_auth._api_request(
+            method="POST",
+            url=url_path_join(hub_auth.api_url, "batchspawner"),
+            body=json.dumps({"port": port}),
+        )
     )
 
     cmd_path = which(sys.argv[1])