2023-10-20 22:08:51 +01:00
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use std::error::Error;
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use std::{env, fmt, fs};
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use axum::extract::State;
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use axum::{
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body::Full,
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http::{Response, StatusCode},
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response::IntoResponse,
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routing::get,
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Router,
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};
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2023-10-21 19:25:06 +01:00
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use lazy_static::lazy_static;
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2023-10-20 22:08:51 +01:00
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use maud::html;
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use maud::Markup;
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use prometheus::{register_gauge_vec, Encoder, GaugeVec, TextEncoder};
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use reqwest::header::USER_AGENT;
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use serde::Deserialize;
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use url::Url;
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lazy_static! {
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static ref PLAYER_COUNT: GaugeVec = register_gauge_vec!(
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"vrchat_playercount",
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"Current number of players in instance.",
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&["instance", "world", "name"],
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)
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.unwrap();
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static ref VRCDN_VIEWERS: GaugeVec = register_gauge_vec!(
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"vrcdn_viewers",
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"Current number viewers according to VRCDN's API.",
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&["region"],
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)
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.unwrap();
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}
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#[derive(Debug)]
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enum WsError {
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Reqwest(reqwest::Error),
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Url(url::ParseError),
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Custom(String),
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}
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impl From<url::ParseError> for WsError {
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fn from(value: url::ParseError) -> Self {
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Self::Url(value)
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}
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}
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impl From<reqwest::Error> for WsError {
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fn from(value: reqwest::Error) -> Self {
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Self::Reqwest(value)
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}
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}
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impl Error for WsError {}
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impl fmt::Display for WsError {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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match self {
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WsError::Reqwest(e) => write!(f, "Reqwest error: {}", e),
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WsError::Custom(e) => write!(f, "Error: {}", e),
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WsError::Url(_) => todo!(),
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}
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}
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}
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#[derive(Clone, Debug, Deserialize)]
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struct Config {
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vrcdn: Option<String>,
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2023-10-21 19:25:06 +01:00
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group: Option<String>,
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2023-10-20 22:08:51 +01:00
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vrchat_token: Option<String>,
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}
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#[derive(Clone, Debug, Deserialize)]
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struct VrcInstance {
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/// Instance ID.
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instance: Option<String>,
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/// World ID.
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world: Option<String>,
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2023-10-21 19:25:06 +01:00
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/// Raw location
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location: Option<String>,
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2023-10-20 22:08:51 +01:00
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/// Custom name for the instance.
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2023-10-21 02:17:44 +01:00
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#[serde(skip)]
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2023-10-21 19:25:06 +01:00
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name: Option<String>,
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2023-10-20 22:08:51 +01:00
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}
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#[derive(Clone, Debug, Deserialize)]
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struct VrcInstanceData {
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2023-10-21 02:17:44 +01:00
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#[serde(rename = "userCount")]
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user_count: Option<f64>,
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2023-10-20 22:08:51 +01:00
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}
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#[derive(Clone, Debug, Deserialize)]
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struct VrCdnData {
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viewers: Vec<VrCdnRegion>,
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}
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#[derive(Clone, Debug, Deserialize)]
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struct VrCdnRegion {
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region: String,
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total: f64,
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}
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2023-10-21 19:25:06 +01:00
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#[derive(Clone, Debug, Deserialize)]
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struct VrcGroupInstance {
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location: String,
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}
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2023-10-20 22:08:51 +01:00
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#[tokio::main]
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async fn main() -> Result<(), ()> {
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let content = fs::read_to_string("config.toml").unwrap();
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let mut config: Config = toml::from_str(&content).unwrap();
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config.vrchat_token = Some(env::var("VRCHAT_AUTH_TOKEN").unwrap());
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let app = Router::new()
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.route("/", get(homepage))
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.route("/metrics", get(metrics_handler))
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.with_state(config);
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2023-10-21 19:25:06 +01:00
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2023-10-20 22:08:51 +01:00
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let _ = axum::Server::bind(&"0.0.0.0:6534".parse().unwrap())
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.serve(app.into_make_service())
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.await;
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Ok(())
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}
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async fn metrics_handler(State(config): State<Config>) -> Result<impl IntoResponse, StatusCode> {
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match metrics(config).await {
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Ok(b) => Ok(Response::builder()
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.header("content-type", "text/plain")
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.status(StatusCode::OK)
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.body(Full::from(b))
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.unwrap()),
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Err(_e) => Err(StatusCode::INTERNAL_SERVER_ERROR),
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}
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}
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async fn homepage() -> Markup {
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html! {
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body {
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main {
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a href = "/metrics" { "metrics" }
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}
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}
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}
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}
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async fn metrics(config: Config) -> Result<Vec<u8>, WsError> {
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2023-10-24 12:29:23 +01:00
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PLAYER_COUNT.reset();
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VRCDN_VIEWERS.reset();
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2023-10-20 22:08:51 +01:00
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let encoder = TextEncoder::new();
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let client = reqwest::Client::new();
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let auth_cookie = format!("auth={}", &config.vrchat_token.unwrap());
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2023-10-21 19:25:06 +01:00
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let mut instances: Vec<VrcInstance> = vec![];
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2023-10-20 22:08:51 +01:00
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2023-10-21 19:25:06 +01:00
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// Check if we can fetch instances from a group if set.
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if config.group.is_some() {
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let api_url = format!(
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"https://api.vrchat.cloud/api/1/groups/{}/instances",
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config.group.unwrap()
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);
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let url = Url::parse(&api_url).unwrap();
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let req = client
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.get(url)
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.header(
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USER_AGENT,
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"vr-event-tracker(git.gmem.ca/arch/vr-event-tracker)",
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2023-10-20 22:08:51 +01:00
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)
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2023-10-21 19:25:06 +01:00
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.header("Cookie", &auth_cookie)
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.send()
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.await?;
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let data: Vec<VrcGroupInstance> = req.json().await?;
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instances = data.into_iter().map(|f| {
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let spl: Vec<&str> = f.location.split(":").collect();
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VrcInstance{ instance: Some(spl[0].to_owned()), world: Some(spl[1].to_owned()), location: Some(f.location), name: None }
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}).collect();
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}
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for instance in instances {
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let api_url = format!(
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2023-10-21 19:25:06 +01:00
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"https://api.vrchat.cloud/api/1/instances/{}",
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&instance.location.clone().unwrap()
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2023-10-20 22:08:51 +01:00
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);
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let url = Url::parse(&api_url).unwrap();
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let req = client
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.get(url)
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2023-10-21 19:25:06 +01:00
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.header(
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USER_AGENT,
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"vr-event-tracker(git.gmem.ca/arch/vr-event-tracker)",
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)
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2023-10-20 22:08:51 +01:00
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.header("Cookie", &auth_cookie)
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.send()
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.await?;
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let data: VrcInstanceData = req.json().await?;
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2023-10-21 19:25:06 +01:00
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let name = instance.name.unwrap_or(instance.location.unwrap());
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2023-10-20 22:08:51 +01:00
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PLAYER_COUNT
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2023-10-21 19:25:06 +01:00
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.with_label_values(&[&instance.world.unwrap(), &instance.instance.unwrap(), &name])
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2023-10-21 02:17:44 +01:00
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.set(data.user_count.unwrap_or(0 as f64));
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2023-10-20 22:08:51 +01:00
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}
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let vrcdn_url = format!(
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"https://api.vrcdn.live/v1/viewers/{}",
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config.vrcdn.unwrap()
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);
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let req = client
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.get(vrcdn_url)
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2023-10-21 19:25:06 +01:00
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.header(
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USER_AGENT,
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"vr-event-tracker(git.gmem.ca/arch/vr-event-tracker)",
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)
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2023-10-20 22:08:51 +01:00
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.send()
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.await
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.unwrap();
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let vrcdn_data: VrCdnData = req.json().await.unwrap();
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for region in vrcdn_data.viewers {
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VRCDN_VIEWERS
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.with_label_values(&[®ion.region])
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.set(region.total);
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}
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let metric_families = prometheus::gather();
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let mut buffer = vec![];
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encoder.encode(&metric_families, &mut buffer).unwrap();
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Ok(buffer)
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}
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