src/main.rs

   1 #[macro_use]
   2 extern crate diesel_migrations;
   3
   4 use crate::diesel_migrations::MigrationHarness;
   5 use actix::prelude::*;
   6 use actix_web::{web::Data, *};
   7 use diesel::{
   8   r2d2::{ConnectionManager, Pool},
   9   PgConnection,
  10 };
  11 use diesel_migrations::EmbeddedMigrations;
  12 use doku::json::{AutoComments, Formatting};
  13 use lemmy_api::match_websocket_operation;
  14 use lemmy_api_common::{
  15   request::build_user_agent,
  16   utils::{blocking, check_private_instance_and_federation_enabled},
  17 };
  18 use lemmy_api_crud::match_websocket_operation_crud;
  19 use lemmy_db_schema::{source::secret::Secret, utils::get_database_url_from_env};
  20 use lemmy_routes::{feeds, images, nodeinfo, webfinger};
  21 use lemmy_server::{
  22   api_routes,
  23   code_migrations::run_advanced_migrations,
  24   init_logging,
  25   root_span_builder::QuieterRootSpanBuilder,
  26   scheduled_tasks,
  27 };
  28 use lemmy_utils::{
  29   error::LemmyError,
  30   rate_limit::{rate_limiter::RateLimiter, RateLimit},
  31   settings::{structs::Settings, SETTINGS},
  32 };
  33 use lemmy_websocket::{chat_server::ChatServer, LemmyContext};
  34 use reqwest::Client;
  35 use reqwest_middleware::ClientBuilder;
  36 use reqwest_retry::{policies::ExponentialBackoff, RetryTransientMiddleware};
  37 use reqwest_tracing::TracingMiddleware;
  38 use std::{
  39   env,
  40   sync::{Arc, Mutex},
  41   thread,
  42   time::Duration,
  43 };
  44 use tracing_actix_web::TracingLogger;
  45
  46 pub const MIGRATIONS: EmbeddedMigrations = embed_migrations!();
  47
  48 /// Max timeout for http requests
  49 pub const REQWEST_TIMEOUT: Duration = Duration::from_secs(10);
  50
  51 #[actix_web::main]
  52 async fn main() -> Result<(), LemmyError> {
  53   let args: Vec<String> = env::args().collect();
  54   if args.len() == 2 && args[1] == "--print-config-docs" {
  55     let fmt = Formatting {
  56       auto_comments: AutoComments::none(),
  57       ..Default::default()
  58     };
  59     println!("{}", doku::to_json_fmt_val(&fmt, &Settings::default()));
  60     return Ok(());
  61   }
  62
  63   let settings = SETTINGS.to_owned();
  64
  65   init_logging(&settings.opentelemetry_url)?;
  66
  67   // Set up the r2d2 connection pool
  68   let db_url = match get_database_url_from_env() {
  69     Ok(url) => url,
  70     Err(_) => settings.get_database_url(),
  71   };
  72   let manager = ConnectionManager::<PgConnection>::new(&db_url);
  73   let pool = Pool::builder()
  74     .max_size(settings.database.pool_size)
  75     .min_idle(Some(1))
  76     .build(manager)
  77     .unwrap_or_else(|_| panic!("Error connecting to {}", db_url));
  78
  79   // Run the migrations from code
  80   let protocol_and_hostname = settings.get_protocol_and_hostname();
  81   blocking(&pool, move |conn| {
  82     let _ = conn
  83       .run_pending_migrations(MIGRATIONS)
  84       .map_err(|_| LemmyError::from_message("Couldn't run migrations"))?;
  85     run_advanced_migrations(conn, &protocol_and_hostname)?;
  86     Ok(()) as Result<(), LemmyError>
  87   })
  88   .await??;
  89
  90   // Schedules various cleanup tasks for the DB
  91   let pool2 = pool.clone();
  92   thread::spawn(move || {
  93     scheduled_tasks::setup(pool2).expect("Couldn't set up scheduled_tasks");
  94   });
  95
  96   // Set up the rate limiter
  97   let rate_limiter = RateLimit {
  98     rate_limiter: Arc::new(Mutex::new(RateLimiter::default())),
  99     rate_limit_config: settings.rate_limit.to_owned().unwrap_or_default(),
 100   };
 101
 102   // Initialize the secrets
 103   let conn = &mut pool.get()?;
 104   let secret = Secret::init(conn).expect("Couldn't initialize secrets.");
 105
 106   println!(
 107     "Starting http server at {}:{}",
 108     settings.bind, settings.port
 109   );
 110
 111   let reqwest_client = Client::builder()
 112     .user_agent(build_user_agent(&settings))
 113     .timeout(REQWEST_TIMEOUT)
 114     .build()?;
 115
 116   let retry_policy = ExponentialBackoff {
 117     max_n_retries: 3,
 118     max_retry_interval: REQWEST_TIMEOUT,
 119     min_retry_interval: Duration::from_millis(100),
 120     backoff_exponent: 2,
 121   };
 122
 123   let client = ClientBuilder::new(reqwest_client.clone())
 124     .with(TracingMiddleware::default())
 125     .with(RetryTransientMiddleware::new_with_policy(retry_policy))
 126     .build();
 127
 128   // Pictrs cannot use the retry middleware
 129   let pictrs_client = ClientBuilder::new(reqwest_client.clone())
 130     .with(TracingMiddleware::default())
 131     .build();
 132
 133   check_private_instance_and_federation_enabled(&pool, &settings).await?;
 134
 135   let chat_server = ChatServer::startup(
 136     pool.clone(),
 137     rate_limiter.clone(),
 138     |c, i, o, d| Box::pin(match_websocket_operation(c, i, o, d)),
 139     |c, i, o, d| Box::pin(match_websocket_operation_crud(c, i, o, d)),
 140     client.clone(),
 141     settings.clone(),
 142     secret.clone(),
 143   )
 144   .start();
 145
 146   // Create Http server with websocket support
 147   let settings_bind = settings.clone();
 148   HttpServer::new(move || {
 149     let context = LemmyContext::create(
 150       pool.clone(),
 151       chat_server.to_owned(),
 152       client.clone(),
 153       settings.to_owned(),
 154       secret.to_owned(),
 155     );
 156     let rate_limiter = rate_limiter.clone();
 157     App::new()
 158       .wrap(actix_web::middleware::Logger::default())
 159       .wrap(TracingLogger::<QuieterRootSpanBuilder>::new())
 160       .app_data(Data::new(context))
 161       .app_data(Data::new(rate_limiter.clone()))
 162       // The routes
 163       .configure(|cfg| api_routes::config(cfg, &rate_limiter))
 164       .configure(|cfg| lemmy_apub::http::routes::config(cfg, &settings))
 165       .configure(feeds::config)
 166       .configure(|cfg| images::config(cfg, pictrs_client.clone(), &rate_limiter))
 167       .configure(nodeinfo::config)
 168       .configure(|cfg| webfinger::config(cfg, &settings))
 169   })
 170   .bind((settings_bind.bind, settings_bind.port))?
 171   .run()
 172   .await?;
 173
 174   Ok(())
 175 }