adding ipy url (#12)

Fixes #10
Verified by creating a docker container:

docker run -p 10000:8888 -p 8080:1234 ghcr.io/deephaven/deephaven-kube-demo-worker-jupyter:main
Then running the following code in a jupyter notebook in the docker container:

from deephaven_server import Server

s = Server(port=1234, jvm_args=["-Xmx10g"])
s.start()

from deephaven_ipywidgets import DeephavenWidget
from deephaven.plot.figure import Figure
from deephaven import empty_table
from deephaven import time_table
from deephaven import ugp

static_table = empty_table(100).update(["X = i", "Y = Math.sin(0.1 * X)"])

import os
os.environ['DEEPHAVEN_IPY_URL'] = "http://localhost:8080/"

static_widget = DeephavenWidget(static_table)
display(static_widget)

deephaven_ipywidgets/deephaven.py

@@ -14,7 +14,7 @@
 from deephaven_server import Server
 from uuid import uuid4
 from ._frontend import module_name, module_version
-
+import os
 
 def _str_object_type(obj):
  """Returns the object type as a string value"""
@@ -63,14 +63,21 @@ def __init__(self, deephaven_object, height=600, width=0):
  object_id = f"t_{str(uuid4()).replace('-', '_')}"
 
  port = Server.instance.port
+
  server_url = f"http://localhost:{Server.instance.port}/"
 
+ if "DEEPHAVEN_IPY_URL" in os.environ:
+ server_url = os.environ["DEEPHAVEN_IPY_URL"]
+
  try:
  from google.colab.output import eval_js
  server_url = eval_js(f"google.colab.kernel.proxyPort({port})")
  except ImportError:
  pass
 
+ if not server_url.endswith("/"):
+ server_url = f"{server_url}/"
+
  # Generate the iframe_url from the object type
  iframe_url = f"{server_url}iframe/{_path_for_object(deephaven_object)}/?name={object_id}"