Bug: KeyError 'mode' in fetch_customnode_list when query parameter is missing

[HuangYuChuh]

Description

The /customnode/getlist endpoint crashes with a KeyError when the mode query parameter is not provided in the request. The handler at glob/manager_server.py:877 accesses request.rel_url.query["mode"] directly without a default value, while the skip_update parameter on line 872 correctly uses .get().

Steps to Reproduce

1. Send a GET request to /customnode/getlist without the mode query parameter
2. The server throws a KeyError: 'mode'

Error Traceback

Error handling request from 127.0.0.1
Traceback (most recent call last):
  File ".../aiohttp/web_protocol.py", line 510, in _handle_request
    resp = await request_handler(request)
  File ".../aiohttp/web_app.py", line 569, in _handle
    return await handler(request)
  ...
  File ".../ComfyUI-Manager/glob/manager_server.py", line 877, in fetch_customnode_list
    if request.rel_url.query["mode"] == "local":
       ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^
KeyError: 'mode'

Root Cause

In glob/manager_server.py, the fetch_customnode_list handler uses direct dictionary access request.rel_url.query["mode"] on lines 877, 882, and 883, which raises KeyError if mode is not present.

Note that skip_update on line 872 already uses the safe .get() pattern:

if request.rel_url.query.get("skip_update", '').lower() == "true":  # ✅ safe

But mode does not:

if request.rel_url.query["mode"] == "local":  # ❌ KeyError if missing

Suggested Fix

Use request.rel_url.query.get("mode", "default") (or an appropriate default value) instead of direct dictionary access on lines 877, 882, and 883. For example:

mode = request.rel_url.query.get("mode", "cache")

if mode == "local":
    channel = 'local'
else:
    channel = core.get_config()['channel_url']

node_packs = await core.get_unified_total_nodes(channel, mode, 'cache')
json_obj_github = core.get_data_by_mode(mode, 'github-stats.json', 'default')
json_obj_extras = core.get_data_by_mode(mode, 'extras.json', 'default')

Environment

• ComfyUI-Manager version: 3.39.3
• ComfyUI version: latest master
• Python: 3.12
• OS: macOS