Nukumizu Backend

Remote server monitoring and command execution subsystem for Komari.

Nukumizu connects to a Komari Dashboard instance, keeps an in-memory view of every monitored server, and pushes alerts to several notification channels. It also runs interactive bots on QQ (via NapCat, OneBot 11) and Telegram so operators can control servers from chat.

Features

• Komari integration — logs into the Komari Dashboard, refreshes the node list on startup and every 5 minutes, and polls each node's latest status through the Komari WebSocket every 5 seconds.
• Status tracking — a thread-safe node tracker keeps the latest report and static info per server and detects Online / Offline transitions.
• Remote command execution — dispatches commands through the Komari task API and polls the result (1s interval, up to 60s timeout).
• Interactive bots — QQ (NapCat / OneBot 11) and Telegram bots for /list, /status, /info, /run, /shutdown, /reboot, and more, protected by an admin / trusted-group permission model.
• Notification channels — server status changes are pushed to every enabled channel: QQ, Telegram, Email (SMTP), ntfy, and Webhook.
• Network proxy — a global proxy URL can be enabled per controller (networkUseProxy) for HTTP, WebSocket, and even SMTP (HTTP CONNECT tunnel).
• Customizable message templates — every bot/notification message is rendered from a template in config.json.
• Storage — SQLite (pure-Go driver) for user.db and log.db; safe on network shares (WAL disabled).
• Dashboard API — token-authenticated REST API plus a live log-streaming WebSocket.

How it works

1. On startup Nukumizu logs in to the Komari Dashboard. A failed login aborts the process.
2. It fetches the node list (name → UUID, static info) and stores it in memory, then opens a WebSocket to poll live status every 5 seconds. If the connection drops it reconnects with exponential backoff; after 5 failed attempts it notifies and keeps retrying.
3. The node tracker uses the first received snapshot as a baseline so a restart does not produce false "offline" alerts, then fires a status-change event for every real transition.
4. Each status-change event is rendered through the SERVER_STATUS_CHANGED template and sent to all enabled controllers. QQ / Telegram additionally receive a startup welcome and the initial server list.
5. Every 12 hours the Komari session is re-authenticated; the node list is refreshed every 5 minutes.

Project structure

nukumizu-backend/
├── main.go                       # Entry point, startup sequence, graceful shutdown
├── router.go                     # HTTP route registration
├── config/
│   ├── config.go                 # Load config files, apply defaults
│   └── variables.go              # Config schema structs + globals
├── global/
│   └── variables.go              # Software build metadata (name/version/developer)
├── handler/
│   ├── user.go                   # /api/user/login, /api/user/register
│   ├── server.go                 # /api/server/list, getInfo, getStatus, exec
│   ├── settings.go               # /api/settings/get, set
│   └── health.go                 # /health
├── database/
│   └── user.go                   # user.db (SQLite) user store
├── utils/
│   ├── auth.go                   # Token management, Auth middleware, JSON responses
│   └── middleware.go             # Rate limit, CORS, XSS/security headers
├── postLog/                      # Logging subsystem
│   ├── postLog.go                # Leveled logger (stdout + broadcast)
│   ├── database.go               # log.db (SQLite, one table per run)
│   ├── logBroadcaster.go         # Fan-out to WebSocket clients
│   └── logSocketHandler.go       # /api/system/getLogs WebSocket handler
└── internal/
    ├── komari/
    │   ├── client.go             # Komari HTTP/JSON-RPC client (login, nodes, task exec/poll)
    │   └── ws.go                 # Komari status WebSocket (poll + reconnect)
    ├── node/
    │   └── tracker.go            # Thread-safe server state, status-change detection
    ├── netproxy/
    │   └── netproxy.go           # Unified network proxy for controllers
    ├── template/
    │   └── template.go           # Message template renderer ({{ variables }})
    └── controller/
        ├── controller.go         # Manager, Controller / BotController interfaces
        ├── trigger.go            # Command parsing, authorization, routing
        ├── processor.go          # Command handlers
        ├── utils.go
        └── pipes/
            ├── email.go          # Email notification pipe
            ├── ntfy.go           # ntfy notification pipe
            ├── webhook.go        # Webhook notification pipe
            ├── qq_napcat/
            │   ├── qq.go         # QQ (NapCat / OneBot 11) bot controller
            │   └── napcat.go     # NapCat WebSocket + HTTP API client
            └── telegram/
                ├── telegram.go   # Telegram bot controller (go-telegram/bot, long polling)
                └── send.go       # Message sending / splitting (Telegram Markdown)

Requirements

• Go 1.25 or newer
• A running Komari Dashboard instance reachable from this host
• For QQ: a NapCat instance exposing an OneBot 11 WebSocket + HTTP endpoint
• For Telegram: a bot token from @BotFather

Key dependencies: github.com/go-telegram/bot, github.com/gorilla/websocket, gopkg.in/mail.v2, modernc.org/sqlite.

Configuration

There are two configuration files, both read from the working directory unless overridden:

File	CLI flag	Default	Purpose
config.json	-config	config.json	Core settings: system, Komari, controllers, message templates
bot_user_config.json	-bot-user-config	bot_user_config.json	Per-bot admins / trusted groups and their notification preferences

Both files are in .gitignore because they contain credentials (Komari password, bot tokens, proxy auth). Start from the samples below and never commit real secrets.

config.json

{
    "system": {
        "debugMode": true,
        "listenAddr": "0.0.0.0",
        "listenPort": "8080",
        "networkProxy": "http://127.0.0.1:7890"
    },
    "debug": {
        "showNapcatMsg": false,
        "showNapcatAction": false,
        "showTelegramMsg": false,
        "showTriggerCmdEcho": true,
        "showKomariTaskEcho": false,
        "napcatIgnoreSelfMsg": false
    },
    "komari": {
        "dashboardURL": "https://status.example.com",
        "account": {
            "username": "admin",
            "password": "CHANGE_ME"
        }
    },
    "controllerMethod": {
        "qq(napcat)": {
            "enabled": false,
            "networkUseProxy": false,
            "napcatAddr": "127.0.0.1",
            "napcatPort": "3000",
            "napcatToken": "",
            "botQQID": 0,
            "listenMethod": "global"
        },
        "telegram": {
            "enabled": false,
            "networkUseProxy": false,
            "botToken": "",
            "listenMethod": "global"
        },
        "email": {
            "enabled": false,
            "networkUseProxy": false,
            "smtpHost": "",
            "smtpPort": 587,
            "username": "",
            "password": "",
            "from": "",
            "to": [],
            "useTLS": true
        },
        "ntfy": {
            "enabled": false,
            "networkUseProxy": false,
            "server": "https://ntfy.sh",
            "topic": "",
            "token": "",
            "priority": "default"
        },
        "webhook": {
            "enabled": false,
            "networkUseProxy": false,
            "url": "",
            "method": "POST",
            "headers": {},
            "template": ""
        }
    },
    "controllerMessage": {
        "BOT_STARTED": "Nukumizu Alert Bot Started\nTime: {{ time }}\n- Software Version: {{ softwareVersion }}\n- Build Version: {{ softwareBuildVer }}\n- Commit Hash: {{ softwareCommitHash }}\n- Build Type: {{ softwareBuildType }}\n- Build Time: {{ softwareBuildTime }}\n- Developer: {{ softwareDeveloper }}",
        "BOT_HELP": "Nukumizu Alert Bot Ver. {{ softwareVersion }}.{{ softwareBuildVer }}.{{ softwareCommitHash }}\nCommand Lists:\n- /help: Show this help message\n- /list: List all servers and show their status\n- /status <UUID>: Show specific server status\n- /info <UUID>: Show specific server info\n- /run <UUID> <command>: Execute command on specific server. If you type \"all\" in <UUID>, you will run the command on all servers.\n- /shutdown <UUID>: Shutdown specific server.\n- /reboot <UUID>: Reboot specific server.\n- /getip <UUID>: Get specific server IP address.",
        "TG_BOT_START": "Welcome to use Nukumizu Alert Bot!\nUse `/help` to get command list.",
        "SERVER_STATUS_CHANGED": "Server Status Changed Alert\n{{ serverName }} - {{ upStatus }}\n- Event: {{ event }}\n- Server Name: {{ serverName }}\n- Message: {{ message }}\n- Time: {{ time }}",
        "SERVER_LIST": "All server list:\n- Online:\n{{ list.onlineServers }}\n- Offline:\n{{ list.offlineServers }}",
        "SERVER_EXECUTE_RESULT": "Command execute result:\n- Server ID: {{ serverName }}\n- Command: {{ command }}\n-----**Result**-----\n\n{{ result }}\n----------\n\n- Time: {{ time }}"
    },
    "dataPath": "./data",
    "dbPath": "./db"
}

Field notes:

• system.networkProxy is a system-wide proxy URL. A controller only uses it when its own networkUseProxy is true. Applied to Telegram HTTP polling, NapCat HTTP/WebSocket, ntfy and webhook requests, and Email SMTP (tunneled via HTTP CONNECT).
• controllerMethod.qq(napcat).listenMethod / telegram.listenMethod — see Bot recognition modes.
• debug toggles verbose per-channel message/action logging; these only matter in debug builds / debugMode.
• email.useTLS is kept for configuration compatibility.
• dataPath / dbPath default to ./data and ./db; user.db and log.db are created under dbPath.
• Missing keys fall back to built-in defaults (host 0.0.0.0, port 8080, NapCat 127.0.0.1:3000, ntfy server https://ntfy.sh, webhook method POST, etc.). Message templates have built-in fallbacks too.

bot_user_config.json

Admins and trusted groups are defined per bot channel and map a member ID to that member's notification preferences:

{
    "qq(napcat)": {
        "admins": {
            "123456789": {
                "event_status_notify": true,
                "event_bot_started": true,
                "event_reply": true
            }
        },
        "trustedGroups": {
            "987654321": {
                "event_status_notify": true,
                "event_bot_started": false,
                "event_reply": true
            }
        }
    },
    "telegram": {
        "admins": {
            "user_handle": {
                "event_status_notify": true,
                "event_bot_started": true,
                "event_reply": true
            }
        },
        "trustedGroups": {
            "-1001234567890": {
                "event_status_notify": true,
                "event_bot_started": false,
                "event_reply": true
            }
        }
    }
}

• QQ: member IDs are QQ numbers; group IDs are the numeric group number.
• Telegram: member IDs may be @username (resolved to the numeric user ID once that user has messaged the bot) or the numeric user ID; group IDs are the numeric chat ID (supergroups are negative).
• Per-member options:
  • event_status_notify — receive server Online/Offline push notifications.
  • event_bot_started — receive the automatic startup message (welcome + initial server list).
  • event_reply — reserved for opting out of replies to that member's own commands.
• Admins of a channel also appear in every trusted-group/private-chat context where the bot sends notifications.

Message templates

controllerMessage templates are rendered before sending. Available variables (rendered through the Telegram pipe are additionally wrapped in Telegram legacy Markdown):

Variable	Meaning
{{ time }}	Current server time
{{ serverName }}	Targeted server name
{{ serverUUID }}	Targeted server UUID
{{ upStatus }}	Online / Offline
{{ event }}	Status change event (Online / Offline)
{{ message }}	Message accompanying a status event
{{ command }}	The command that was executed
{{ result }}	Command execution result
{{ list.onlineServers }}	Formatted list of online servers (- Name (uuid))
{{ list.offlineServers }}	Formatted list of offline servers
{{ softwareVersion }}, {{ softwareBuildVer }}, {{ softwareCommitHash }}, {{ softwareBuildType }}, {{ softwareBuildTime }}, {{ softwareDeveloper }}, {{ softwareDescription }}	Build metadata (commit hash and build time are injected at compile time)

API

All responses follow the envelope {"success": true|false, "message": "...", ...data}. message is empty on success unless noted.

Authentication

Requests are authenticated with HTTP headers:

Header	Meaning
X-Token	Token returned by login/register. Held in memory only (lost on restart).
X-Timestamp	Unix timestamp (seconds); rejected if more than ±30 minutes from server time. Skipped entirely when system.debugMode is true.

Tokens idle for more than 1 hour are expired (cleaned every 10 minutes); any authenticated call refreshes the timer. Permission levels: None, bot, admin. Endpoints requiring bot accept both bot and admin tokens. Currently registration/login always issue admin-level tokens.

Endpoints

Endpoint	Method	Permission	Description
/api/user/login	POST	None	Log in. Body {username, password}. Returns {token, userID, username, level, registerDate}.
/api/user/register	POST	None	Register the first user. Body {username, password}. Only allowed while no user exists; otherwise 403. Returns {token, userID, username, level}.
/api/server/list	GET	bot / admin	List all monitored servers.
/api/server/getInfo	GET	admin	Static server info (mirrors the Bot's /info). Query ?uuid=<uuid> (or all). Returns {success, <uuid>: {uuid, name, info}} — one entry per requested server. 404 for an unknown single uuid.
/api/server/getStatus	GET	admin	Live server status (mirrors the Bot's /status). Query ?uuid=<uuid> (or all). Returns {success, <uuid>: {uuid, name, online, report}}; report is null when the node has not reported yet. 404 for an unknown single uuid.
/api/server/exec	POST	bot / admin	Execute a command. Body {uuid: [<uuid>...], command}. Dispatches a Komari task and polls until completion (or timeout). Returns {taskID, results}.
/api/settings/get	GET	admin	?type=global|bot_user_config|bot_node_config
/api/settings/set	POST	admin	?type=<same types> + JSON body of partial updates, e.g. {"system":{"debugMode":true}}
/health	GET	None	Health check. Returns {status, database}.
/api/system/getLogs	WebSocket	None	Streams logs. Sends the last 100 buffered entries, then live {level, content, timestamp} events.

Middleware applied to the whole server:

• Rate limit — token bucket, 100 requests/minute per client IP.
• CORS — Access-Control-Allow-Origin: *, allows Content-Type, X-Token, X-Timestamp, Authorization.
• Security headers — X-XSS-Protection, X-Content-Type-Options: nosniff, X-Frame-Options: DENY, Referrer-Policy, a restrictive CSP.

Bots

QQ (NapCat) and Telegram bots share one command engine and authorization pipeline, implemented in internal/controller/. NapCat speaks OneBot 11 (WebSocket event stream + HTTP actions); Telegram uses go-telegram/bot long polling.

Permission model

• Trusted group: any command issued inside a group is only answered if that group is listed in trustedGroups. Messages in other groups are ignored.
• Admin commands: /shutdown, /reboot, and /run additionally require the sender to be listed in admins.
• Private chat: non-admin commands (/help, /list, /status, /info, /getip) are answered for any private sender; admin commands still require admin.

Bot recognition modes

• global — the bot watches all messages in trusted groups and reacts to recognized commands without being mentioned. Unknown /-commands are silently ignored.
• at — the bot only reacts when it is mentioned (QQ @, Telegram @botname). In this mode an unknown command produces an Unknown command: /… reply.

Commands

Command	Permission	Description
/help	All	Show the help message (BOT_HELP template).
/list	All	List all servers with online/offline state (SERVER_LIST template).
/status <uuid>	All	Live report for a server (CPU, RAM, disk, network, uptime, processes).
/info <uuid>	All	Static info for a server (OS, kernel, CPU, RAM, swap, disk, billing, tags).
/getip <uuid>	All	IPv4 / IPv6 address of a server.
/shutdown <uuid>	Admin	Shut the server down via the Komari task API.
/reboot <uuid>	Admin	Reboot the server via the Komari task API.
/run <uuid|all> <command>	Admin	Execute a command on one server or on all servers (all), then report the result (SERVER_EXECUTE_RESULT template).
/start	All	Telegram only — sends the TG_BOT_START welcome message.

Notification channels

QQ and Telegram are interactive channels. Email, ntfy, and webhook are status-only channels — they receive server status-change alerts but cannot run commands. On startup, the welcome message and initial server list are delivered only to the bot channels (QQ / Telegram), honoring each member's event_bot_started preference.

Building

Requires Go 1.25+. Repo includes helper scripts that bake the current git commit and build time into the binary via -ldflags:

# Windows (cross-compile to Linux amd64)
build-linux-x86_64.bat

# Windows amd64
build-win-x86_64.bat

Equivalent manual builds:

# Linux / macOS
CGO_ENABLED=0 GOOS=linux GOARCH=amd64 \
  go build -ldflags "-X main.CommitHash=$(git rev-parse --short HEAD) -X main.BuildTime=$(date -u +%Y-%m-%dT%H:%M:%SZ)" \
  -o nukumizu-linux-amd64 .

# Windows
CGO_ENABLED=0 GOOS=windows GOARCH=amd64 \
  go build -ldflags "-X main.CommitHash=<commit> -X main.BuildTime=<utc-time>" \
  -o nukumizu-windows-amd64.exe .

main.CommitHash and main.BuildTime are surfaced in logs and in the BOT_STARTED message.

Running

Both config.json and bot_user_config.json must exist in the working directory (or be passed explicitly):

# Development (uses go run, so config files must be in the CWD)
run.bat

# Or build first, then run a binary
./nukumizu-linux-amd64 -config config.json -bot-user-config bot_user_config.json

On startup the program logs in to Komari, loads node state, connects the status WebSocket, then starts each enabled controller and the HTTP server on listenAddr:listenPort. Press Ctrl+C for a graceful shutdown.

License

See LICENSE.