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141 lines
7.1 KiB
Markdown
141 lines
7.1 KiB
Markdown
# node-GameDig - Game Server Query Library
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[](https://www.npmjs.com/package/gamedig)  
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**node-GameDig** is a game server query Node.js module (as well as a [command line executable](#usage-from-command-line)),
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capable of querying for the status of nearly any game or voice server.
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If a server makes its status publically available, GameDig can fetch it for you.
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Support is available on the [Discord server](https://discord.gg/NVCMn3tnxH) (for questions), or [GitHub Issues](https://github.com/gamedig/node-gamedig/issues) (for bugs).
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## Games List
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**node-GameDig** can query over 310 games (+ a few services)!
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See the [GAMES_LIST.md](GAMES_LIST.md) file for the currently supported titles, not yet supported ones and notes about some of them.
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## Usage from Node.js
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Install using your favorite package manager: `npm install gamedig`, then use!
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```js
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import GameDig from 'gamedig';
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GameDig.query({
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type: 'minecraft',
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host: 'mc.example.com'
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}).then((state) => {
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console.log(state);
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}).catch((error) => {
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console.log("Server is offline");
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});
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```
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Confused on how this works, or you want to see more? Checkout the [examples](/examples) folder!
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## Query Options
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**Typical**
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* **type**: string - One of the game IDs listed in the game list below
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* **host**: string - Hostname or IP of the game server
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* **port**: number (optional) - Connection port or query port for the game server. Some
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games utilize a separate "query" port. If specifying the game port does not seem to work as expected, passing in
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this query port may work instead. (defaults to protocol default port)
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**Advanced**
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These fields are all optional.
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* **maxAttempts**: number - Number of attempts to query server in case of failure. (default 1)
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* **socketTimeout**: number - Milliseconds to wait for a single packet. Beware that increasing this
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will cause many queries to take longer even if the server is online. (default 2000)
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* **attemptTimeout**: number - Milliseconds allowed for an entire query attempt. This timeout is not commonly hit,
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as the socketTimeout typically fires first. (default 10000)
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* **givenPortOnly**: boolean - Only attempt to query server on given port. (default false)
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* **ipFamily**: number - IP family/version returned when looking up hostnames via DNS, can be 0 (IPv4 and IPv6), 4 (IPv4 only) or 6 (IPv6 only). (default 0)
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* **debug**: boolean - Enables massive amounts of debug logging to stdout. (default false)
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* **requestRules**: boolean - Valve games only. Additional 'rules' may be fetched into the `raw` field. (default false)
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## Return Value
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The returned state object will contain the following keys:
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* **name**: string - Server name
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* **map**: string - Current server game map
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* **password**: boolean - If a password is required
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* **numplayers**: number
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* **maxplayers**: number
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* **players**: array of objects - note that this could be of a different length compared to **numplayers**
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* **name**: string - If the player's name is unknown, the string will be empty.
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* **raw**: object - Additional information about the player if available.
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* **bots**: array of objects - Same schema as `players`
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* **connect**: string
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* This will typically include the game's `ip:port`
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* The port will reflect the server's game port, even if your request specified the game's query port in the request.
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* For some games, this may be a server ID or connection url if an IP:Port is not appropriate for end-users.
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* **ping**: number
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* Round trip time to the server (in milliseconds).
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* Note that this is not the RTT of an ICMP echo, as ICMP packets are often blocked by NATs and node
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has poor support for raw sockets.
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* This value is derived from the RTT of one of the query packets, which is usually quite accurate, but may add a bit due to server lag.
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* **raw**: object
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* Contains all information received from the server in a disorganized format.
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Note that `raw` (or **unstable**) objects contents MAY change on a per-protocol basis between GameDig patch releases (although not typical).
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### Usage from Command Line
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Want to integrate server queries from a batch script or other programming language?
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You'll still need npm to install gamedig:
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```shell
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npm install gamedig -g
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```
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After installing gamedig globally, you can call gamedig via the command line:
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```shell
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gamedig --type minecraft mc.example.com:11234
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# Alternatively, if you don't want to install gamedig globally, you can run it with npx:
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npx gamedig --type minecraft mc.example.com:11234
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```
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The output of the command will be in JSON format.
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Additional advanced parameters can be passed in as well:
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* `--debug`: Print debugging informations, useful when stating an issue.
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* `--pretty`: Outputs the JSON format nicely.
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* `--requestRules`: Request Valve games rules.
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* `--givenPortOnly`: Run the query with the specified port only (if any).
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* `--socketTimeout N`: Specifies socket timeout (where `N` is a number, eg. `5000`).
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* ... and the rest in the same format.
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## Deno
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The minimum supported deno version is `1.39.2` and the `--allow-net` permission is required.
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## Common Issues
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### Firewalls block incoming UDP
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*(replit / docker / some VPS providers)*
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Most game query protocols require a UDP request and response. This means that in some environments, gamedig may not be able to receive the reponse required due to environmental restrictions.
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Some examples include:
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* Docker containers
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* You may need to run the container in `--network host` mode so that gamedig can bind a UDP listen port.
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* Alternatively, you can forward a single UDP port to your container, and force gamedig to listen on that port using the instructions in the section down below.
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* replit
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* Most online IDEs run in an isolated container, which will never receive UDP responses from outside networks.
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* Various VPS / server providers
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* Even if your server provider doesn't explicitly block incoming UDP packets, some server hosts block other server hosts from connecting to them for DDOS-mitigation and anti-botting purposes.
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### Gamedig doesn't work in the browser
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Gamedig cannot operate within a browser. This means you cannot package it as part of your webpack / browserify / rollup / parcel package.
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Even if you were able to get it packaged into a bundle, unfortunately no browsers support the UDP protocols required to query server status
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from most game servers.
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As an alternative, we'd recommend using gamedig on your server-side, then expose your own API to your webapp's frontend
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displaying the status information. If your application is thin (with no constant server component), you may wish to investigate a server-less lambda provider.
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### Specifying a listen UDP port override
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In some very rare scenarios, you may need to bind / listen on a fixed local UDP port. The is usually not needed except behind
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some extremely strict firewalls, or within a docker container (where you only wish to forward a single UDP port).
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To use a fixed listen udp port, construct a new Gamedig object like this:
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```
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const gamedig = new GameDig({
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listenUdpPort: 13337
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});
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gamedig.query(...)
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```
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