server: Parse port numbers from MCP server URLs in CORS proxy (#20208)

* Parse port numbers from MCP server URLs

* Pass scheme to http proxy for determining whether to use SSL

* Fix download on non-standard port and re-add port to logging

* add test

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Co-authored-by: Xuan Son Nguyen <son@huggingface.co>

tools/server/tests/utils.py

@@ -102,6 +102,7 @@ class ServerProcess:
     mmproj_url: str | None = None
     media_path: str | None = None
     sleep_idle_seconds: int | None = None
+    webui_mcp_proxy: bool = False
 
     # session variables
     process: subprocess.Popen | None = None
@@ -236,6 +237,8 @@ class ServerProcess:
             server_args.extend(["--media-path", self.media_path])
         if self.sleep_idle_seconds is not None:
             server_args.extend(["--sleep-idle-seconds", self.sleep_idle_seconds])
+        if self.webui_mcp_proxy:
+            server_args.append("--webui-mcp-proxy")
 
         args = [str(arg) for arg in [server_path, *server_args]]
         print(f"tests: starting server with: {' '.join(args)}")