lemmy/src/lib.rs

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7.4 KiB
Rust
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pub mod api_routes_http;
pub mod code_migrations;
#[cfg(feature = "prometheus-metrics")]
pub mod prometheus_metrics;
pub mod root_span_builder;
pub mod scheduled_tasks;
#[cfg(feature = "console")]
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pub mod telemetry;
use crate::{code_migrations::run_advanced_migrations, root_span_builder::QuieterRootSpanBuilder};
use activitypub_federation::config::{FederationConfig, FederationMiddleware};
use actix_cors::Cors;
use actix_web::{middleware, web::Data, App, HttpServer, Result};
use lemmy_api_common::{
context::LemmyContext,
lemmy_db_views::structs::SiteView,
request::build_user_agent,
utils::{
check_private_instance_and_federation_enabled,
local_site_rate_limit_to_rate_limit_config,
},
};
use lemmy_apub::{VerifyUrlData, FEDERATION_HTTP_FETCH_LIMIT};
use lemmy_db_schema::{
source::secret::Secret,
utils::{build_db_pool, get_database_url, run_migrations},
};
use lemmy_routes::{feeds, images, nodeinfo, webfinger};
use lemmy_utils::{error::LemmyError, rate_limit::RateLimitCell, settings::SETTINGS};
use reqwest::Client;
use reqwest_middleware::ClientBuilder;
use reqwest_tracing::TracingMiddleware;
use std::{env, thread, time::Duration};
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use tracing::subscriber::set_global_default;
use tracing_actix_web::TracingLogger;
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use tracing_error::ErrorLayer;
use tracing_log::LogTracer;
use tracing_subscriber::{filter::Targets, layer::SubscriberExt, Layer, Registry};
use url::Url;
#[cfg(feature = "prometheus-metrics")]
use {
actix_web_prom::PrometheusMetricsBuilder,
prometheus::default_registry,
prometheus_metrics::serve_prometheus,
};
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/// Max timeout for http requests
pub(crate) const REQWEST_TIMEOUT: Duration = Duration::from_secs(10);
/// Placing the main function in lib.rs allows other crates to import it and embed Lemmy
pub async fn start_lemmy_server() -> Result<(), LemmyError> {
let args: Vec<String> = env::args().collect();
let scheduled_tasks_enabled = args.get(1) != Some(&"--disable-scheduled-tasks".to_string());
let settings = SETTINGS.to_owned();
// Run the DB migrations
let db_url = get_database_url(Some(&settings));
run_migrations(&db_url);
// Set up the connection pool
let pool = build_db_pool(&settings).await?;
// Run the Code-required migrations
run_advanced_migrations(&pool, &settings).await?;
// Initialize the secrets
let secret = Secret::init(&pool)
.await
.expect("Couldn't initialize secrets.");
// Make sure the local site is set up.
let site_view = SiteView::read_local(&pool)
.await
.expect("local site not set up");
let local_site = site_view.local_site;
let federation_enabled = local_site.federation_enabled;
if federation_enabled {
println!("federation enabled, host is {}", &settings.hostname);
}
check_private_instance_and_federation_enabled(&local_site)?;
// Set up the rate limiter
let rate_limit_config =
local_site_rate_limit_to_rate_limit_config(&site_view.local_site_rate_limit);
let rate_limit_cell = RateLimitCell::new(rate_limit_config).await;
println!(
"Starting http server at {}:{}",
settings.bind, settings.port
);
let user_agent = build_user_agent(&settings);
let reqwest_client = Client::builder()
.user_agent(user_agent.clone())
.timeout(REQWEST_TIMEOUT)
.connect_timeout(REQWEST_TIMEOUT)
.build()?;
let client = ClientBuilder::new(reqwest_client.clone())
.with(TracingMiddleware::default())
.build();
// Pictrs cannot use the retry middleware
let pictrs_client = ClientBuilder::new(reqwest_client.clone())
.with(TracingMiddleware::default())
.build();
let context = LemmyContext::create(
pool.clone(),
client.clone(),
secret.clone(),
rate_limit_cell.clone(),
);
if scheduled_tasks_enabled {
// Schedules various cleanup tasks for the DB
thread::spawn({
let context = context.clone();
move || {
scheduled_tasks::setup(db_url, user_agent, context)
.expect("Couldn't set up scheduled_tasks");
}
});
}
#[cfg(feature = "prometheus-metrics")]
serve_prometheus(settings.prometheus.as_ref(), context.clone());
let settings_bind = settings.clone();
let federation_config = FederationConfig::builder()
.domain(settings.hostname.clone())
.app_data(context.clone())
.client(client.clone())
.http_fetch_limit(FEDERATION_HTTP_FETCH_LIMIT)
.worker_count(settings.worker_count)
.retry_count(settings.retry_count)
.debug(cfg!(debug_assertions))
.http_signature_compat(true)
.url_verifier(Box::new(VerifyUrlData(context.pool().clone())))
.build()
.await?;
// this must come before the HttpServer creation
// creates a middleware that populates http metrics for each path, method, and status code
#[cfg(feature = "prometheus-metrics")]
let prom_api_metrics = PrometheusMetricsBuilder::new("lemmy_api")
.registry(default_registry().clone())
.build()
.unwrap();
// Create Http server with websocket support
HttpServer::new(move || {
let cors_origin = std::env::var("LEMMY_CORS_ORIGIN");
let cors_config = match (cors_origin, cfg!(debug_assertions)) {
(Ok(origin), false) => Cors::default()
.allowed_origin(&origin)
.allowed_origin(&settings.get_protocol_and_hostname()),
_ => Cors::default()
.allow_any_origin()
.allow_any_method()
.allow_any_header()
.expose_any_header()
.max_age(3600),
};
let app = App::new()
.wrap(middleware::Logger::new(
// This is the default log format save for the usage of %{r}a over %a to guarantee to record the client's (forwarded) IP and not the last peer address, since the latter is frequently just a reverse proxy
"%{r}a '%r' %s %b '%{Referer}i' '%{User-Agent}i' %T",
))
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.wrap(middleware::Compress::default())
.wrap(cors_config)
.wrap(TracingLogger::<QuieterRootSpanBuilder>::new())
.app_data(Data::new(context.clone()))
.app_data(Data::new(rate_limit_cell.clone()))
.wrap(FederationMiddleware::new(federation_config.clone()));
#[cfg(feature = "prometheus-metrics")]
let app = app.wrap(prom_api_metrics.clone());
// The routes
app
.configure(|cfg| api_routes_http::config(cfg, rate_limit_cell))
.configure(|cfg| {
if federation_enabled {
lemmy_apub::http::routes::config(cfg);
webfinger::config(cfg);
}
})
.configure(feeds::config)
.configure(|cfg| images::config(cfg, pictrs_client.clone(), rate_limit_cell))
.configure(nodeinfo::config)
})
.bind((settings_bind.bind, settings_bind.port))?
.run()
.await?;
Ok(())
}
pub fn init_logging(opentelemetry_url: &Option<Url>) -> Result<(), LemmyError> {
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LogTracer::init()?;
let log_description = std::env::var("RUST_LOG").unwrap_or_else(|_| "info".into());
let targets = log_description
.trim()
.trim_matches('"')
.parse::<Targets>()?;
let format_layer = {
#[cfg(feature = "json-log")]
let layer = tracing_subscriber::fmt::layer().json();
#[cfg(not(feature = "json-log"))]
let layer = tracing_subscriber::fmt::layer();
layer.with_filter(targets.clone())
};
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let subscriber = Registry::default()
.with(format_layer)
.with(ErrorLayer::default());
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if let Some(_url) = opentelemetry_url {
#[cfg(feature = "console")]
telemetry::init_tracing(_url.as_ref(), subscriber, targets)?;
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#[cfg(not(feature = "console"))]
tracing::error!("Feature `console` must be enabled for opentelemetry tracing");
} else {
set_global_default(subscriber)?;
}
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Ok(())
}