lemmy/src/lib.rs

195 lines
5.8 KiB
Rust
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pub mod api_routes_http;
pub mod api_routes_websocket;
pub mod code_migrations;
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 actix_web::{middleware, web::Data, App, HttpServer, Result};
use doku::json::{AutoComments, CommentsStyle, Formatting, ObjectsStyle};
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,
},
websocket::chat_server::ChatServer,
};
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::{structs::Settings, SETTINGS},
};
use reqwest::Client;
use reqwest_middleware::ClientBuilder;
use reqwest_retry::{policies::ExponentialBackoff, RetryTransientMiddleware};
use reqwest_tracing::TracingMiddleware;
use std::{env, sync::Arc, 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;
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/// Max timeout for http requests
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();
if args.len() == 2 && args[1] == "--print-config-docs" {
let fmt = Formatting {
auto_comments: AutoComments::none(),
comments_style: CommentsStyle {
separator: "#".to_owned(),
},
objects_style: ObjectsStyle {
surround_keys_with_quotes: false,
use_comma_as_separator: false,
},
..Default::default()
};
println!("{}", doku::to_json_fmt_val(&fmt, &Settings::default()));
return Ok(());
}
let settings = SETTINGS.to_owned();
// Set up the bb8 connection pool
let db_url = get_database_url(Some(&settings));
run_migrations(&db_url);
// Run the migrations from code
let pool = build_db_pool(&settings).await?;
run_advanced_migrations(&pool, &settings).await?;
// Schedules various cleanup tasks for the DB
thread::spawn(move || {
scheduled_tasks::setup(db_url).expect("Couldn't set up scheduled_tasks");
});
// 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 reqwest_client = Client::builder()
.user_agent(build_user_agent(&settings))
.timeout(REQWEST_TIMEOUT)
.build()?;
let retry_policy = ExponentialBackoff {
max_n_retries: 3,
max_retry_interval: REQWEST_TIMEOUT,
min_retry_interval: Duration::from_millis(100),
backoff_exponent: 2,
};
let client = ClientBuilder::new(reqwest_client.clone())
.with(TracingMiddleware::default())
.with(RetryTransientMiddleware::new_with_policy(retry_policy))
.build();
// Pictrs cannot use the retry middleware
let pictrs_client = ClientBuilder::new(reqwest_client.clone())
.with(TracingMiddleware::default())
.build();
let chat_server = Arc::new(ChatServer::startup());
// Create Http server with websocket support
let settings_bind = settings.clone();
HttpServer::new(move || {
let context = LemmyContext::create(
pool.clone(),
chat_server.clone(),
client.clone(),
settings.clone(),
secret.clone(),
rate_limit_cell.clone(),
);
App::new()
.wrap(middleware::Logger::default())
.wrap(TracingLogger::<QuieterRootSpanBuilder>::new())
.app_data(Data::new(context))
.app_data(Data::new(rate_limit_cell.clone()))
// The routes
.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 = tracing_subscriber::fmt::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(())
}