Update app.py

app.py

@@ -1,9 +1,45 @@
+import os
 import subprocess
+import time
 import gradio as gr
 
 def launch_jupyter():
-    subprocess.Popen(["jupyter", "lab", "--ip=0.0.0.0", "--port=7860", "--no-browser"])
-    return "JupyterLab launched. Visit Space URL + port 7860."
+    # 1. Install Node.js and LocalTunnel (runtime, not Dockerfile)
+    os.system("apt-get update && apt-get install -y nodejs npm")
+    os.system("npm install -g localtunnel")
 
+    # 2. Set a secure token (you can change this or generate dynamically)
+    token = "letmein123"
+
+    # 3. Launch JupyterLab with token authentication
+    subprocess.Popen([
+        "jupyter", "lab",
+        "--ip=127.0.0.1",
+        "--port=8888",
+        "--no-browser",
+        f"--NotebookApp.token={token}",
+        "--NotebookApp.allow_origin='*'",
+        "--NotebookApp.allow_remote_access=True"
+    ])
+
+    time.sleep(5)  # Give Jupyter some time to boot
+
+    # 4. Start LocalTunnel to expose port 8888
+    proc = subprocess.Popen(
+        ["lt", "--port", "8888", "--subdomain", "zyxciss-jlab"],
+        stdout=subprocess.PIPE,
+        stderr=subprocess.STDOUT,
+        text=True
+    )
+
+    # 5. Extract and return the LocalTunnel URL
+    for line in proc.stdout:
+        if "your url is:" in line:
+            url = line.strip().split("your url is:")[1].strip()
+            return f"🔓 Access JupyterLab here:\n{url}?token={token}"
+
+    return "❌ Failed to start LocalTunnel."
+
+# Gradio UI
 demo = gr.Interface(fn=launch_jupyter, inputs=[], outputs="text")
 demo.launch()