lemmy/src/main.rs

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#[macro_use]
extern crate diesel_migrations;
use crate::diesel_migrations::MigrationHarness;
use actix::prelude::*;
use actix_web::{web::Data, *};
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use diesel::{
r2d2::{ConnectionManager, Pool},
PgConnection,
};
use diesel_migrations::EmbeddedMigrations;
use doku::json::{AutoComments, Formatting};
use lemmy_api::match_websocket_operation;
use lemmy_api_common::{
lemmy_db_views::structs::SiteView,
request::build_user_agent,
utils::{
blocking,
check_private_instance_and_federation_enabled,
local_site_rate_limit_to_rate_limit_config,
},
};
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use lemmy_api_crud::match_websocket_operation_crud;
use lemmy_db_schema::{source::secret::Secret, utils::get_database_url_from_env};
use lemmy_routes::{feeds, images, nodeinfo, webfinger};
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use lemmy_server::{
api_routes,
code_migrations::run_advanced_migrations,
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init_logging,
root_span_builder::QuieterRootSpanBuilder,
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scheduled_tasks,
};
use lemmy_utils::{
error::LemmyError,
rate_limit::{rate_limiter::RateLimiter, RateLimit},
settings::{structs::Settings, SETTINGS},
};
use lemmy_websocket::{chat_server::ChatServer, LemmyContext};
use reqwest::Client;
use reqwest_middleware::ClientBuilder;
use reqwest_retry::{policies::ExponentialBackoff, RetryTransientMiddleware};
use reqwest_tracing::TracingMiddleware;
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use std::{
env,
sync::{Arc, Mutex},
thread,
time::Duration,
};
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use tracing_actix_web::TracingLogger;
pub const MIGRATIONS: EmbeddedMigrations = embed_migrations!();
/// Max timeout for http requests
pub const REQWEST_TIMEOUT: Duration = Duration::from_secs(10);
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#[actix_web::main]
async fn main() -> 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(),
..Default::default()
};
println!("{}", doku::to_json_fmt_val(&fmt, &Settings::default()));
return Ok(());
}
let settings = SETTINGS.to_owned();
init_logging(&settings.opentelemetry_url)?;
// Set up the r2d2 connection pool
let db_url = match get_database_url_from_env() {
Ok(url) => url,
Err(_) => settings.get_database_url(),
};
let manager = ConnectionManager::<PgConnection>::new(&db_url);
let pool = Pool::builder()
.max_size(settings.database.pool_size)
.min_idle(Some(1))
.build(manager)
.unwrap_or_else(|_| panic!("Error connecting to {}", db_url));
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// Run the migrations from code
let settings_cloned = settings.to_owned();
blocking(&pool, move |conn| {
let _ = conn
.run_pending_migrations(MIGRATIONS)
.map_err(|_| LemmyError::from_message("Couldn't run migrations"))?;
run_advanced_migrations(conn, &settings_cloned)?;
Ok(()) as Result<(), LemmyError>
})
.await??;
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// Schedules various cleanup tasks for the DB
let pool2 = pool.clone();
thread::spawn(move || {
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scheduled_tasks::setup(pool2).expect("Couldn't set up scheduled_tasks");
});
// Initialize the secrets
let conn = &mut pool.get()?;
let secret = Secret::init(conn).expect("Couldn't initialize secrets.");
// Make sure the local site is set up.
let site_view = SiteView::read_local(conn).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);
// TODO this isn't live-updating
// https://github.com/LemmyNet/lemmy/issues/2508
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let rate_limiter = RateLimit {
rate_limiter: Arc::new(Mutex::new(RateLimiter::default())),
rate_limit_config,
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};
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println!(
"Starting http server at {}:{}",
settings.bind, settings.port
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);
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,
};
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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 = ChatServer::startup(
pool.clone(),
rate_limiter.clone(),
|c, i, o, d| Box::pin(match_websocket_operation(c, i, o, d)),
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|c, i, o, d| Box::pin(match_websocket_operation_crud(c, i, o, d)),
client.clone(),
settings.clone(),
secret.clone(),
)
.start();
// Create Http server with websocket support
let settings_bind = settings.clone();
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HttpServer::new(move || {
let context = LemmyContext::create(
pool.clone(),
chat_server.to_owned(),
client.clone(),
settings.to_owned(),
secret.to_owned(),
);
let rate_limiter = rate_limiter.clone();
App::new()
.wrap(actix_web::middleware::Logger::default())
.wrap(TracingLogger::<QuieterRootSpanBuilder>::new())
.app_data(Data::new(context))
.app_data(Data::new(rate_limiter.clone()))
// The routes
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.configure(|cfg| api_routes::config(cfg, &rate_limiter))
.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_limiter))
.configure(nodeinfo::config)
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})
.bind((settings_bind.bind, settings_bind.port))?
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.run()
.await?;
Ok(())
}