Add cors config to sse server

Author: Inna

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "mcp-server-jupyter"
-version = "0.1.6"
+version = "0.1.7"
 description = "MCP server for Jupyter notebooks"
 readme = "README.md"
 requires-python = ">=3.10"

src/mcp_server_jupyter/server.py

@@ -5,6 +5,8 @@
 from mcp.server.sse import SseServerTransport
 from starlette.applications import Starlette
 from starlette.routing import Mount, Route
+from starlette.middleware import Middleware
+from starlette.middleware.cors import CORSMiddleware
 
 from mcp_server_jupyter.notebook_manager import NotebookManager
 
@@ -32,11 +34,24 @@ async def handle_sse(request):
         )
 
 
+# Configure CORS middleware
+middleware = [
+    Middleware(
+        CORSMiddleware,
+        allow_origins=["*"],
+        allow_methods=["GET", "POST"],
+        allow_headers=["Accept", "Content-Type", "Origin"],
+        expose_headers=["Content-Type", "Content-Length"],
+        allow_credentials=False,
+    )
+]
+
 starlette_app = Starlette(
     routes=[
         Route("/sse", endpoint=handle_sse),
         Mount("/messages/", app=sse.handle_post_message),
-    ]
+    ],
+    middleware=middleware,
 )