mirror of
https://github.com/LemmyNet/lemmy.git
synced 2024-11-22 20:31:19 +00:00
638 lines
20 KiB
Rust
638 lines
20 KiB
Rust
use activitypub_federation::config::Data;
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use chrono::{DateTime, TimeZone, Utc};
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use clokwerk::{AsyncScheduler, TimeUnits as CTimeUnits};
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use diesel::{
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dsl::{exists, not, IntervalDsl},
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sql_query,
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sql_types::{Integer, Timestamptz},
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BoolExpressionMethods,
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ExpressionMethods,
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NullableExpressionMethods,
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QueryDsl,
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QueryableByName,
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};
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use diesel_async::{AsyncPgConnection, RunQueryDsl};
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use lemmy_api_common::{
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context::LemmyContext,
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send_activity::{ActivityChannel, SendActivityData},
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};
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use lemmy_api_crud::post::create::send_webmention;
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use lemmy_db_schema::{
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schema::{
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captcha_answer,
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comment,
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community,
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community_person_ban,
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instance,
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person,
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post,
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received_activity,
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sent_activity,
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},
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source::{
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community::Community,
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instance::{Instance, InstanceForm},
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local_user::LocalUser,
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post::{Post, PostUpdateForm},
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},
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traits::Crud,
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utils::{functions::coalesce, get_conn, naive_now, now, DbPool, DELETED_REPLACEMENT_TEXT},
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};
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use lemmy_routes::nodeinfo::{NodeInfo, NodeInfoWellKnown};
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use lemmy_utils::error::LemmyResult;
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use reqwest_middleware::ClientWithMiddleware;
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use std::time::Duration;
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use tracing::{error, info, warn};
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/// Schedules various cleanup tasks for lemmy in a background thread
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pub async fn setup(context: Data<LemmyContext>) -> LemmyResult<()> {
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// Setup the connections
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let mut scheduler = AsyncScheduler::new();
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startup_jobs(&mut context.pool()).await;
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let context_1 = context.clone();
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// Update active counts expired bans and unpublished posts every hour
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scheduler.every(CTimeUnits::hour(1)).run(move || {
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let context = context_1.clone();
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async move {
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active_counts(&mut context.pool()).await;
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update_banned_when_expired(&mut context.pool()).await;
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}
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});
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let context_1 = context.reset_request_count();
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// Every 10 minutes update hot ranks, delete expired captchas and publish scheduled posts
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scheduler.every(CTimeUnits::minutes(10)).run(move || {
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let context = context_1.reset_request_count();
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async move {
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update_hot_ranks(&mut context.pool()).await;
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delete_expired_captcha_answers(&mut context.pool()).await;
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publish_scheduled_posts(&context).await;
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}
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});
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let context_1 = context.clone();
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// Clear old activities every week
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scheduler.every(CTimeUnits::weeks(1)).run(move || {
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let context = context_1.clone();
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async move {
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clear_old_activities(&mut context.pool()).await;
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}
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});
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let context_1 = context.clone();
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// Daily tasks:
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// - Overwrite deleted & removed posts and comments every day
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// - Delete old denied users
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// - Update instance software
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scheduler.every(CTimeUnits::days(1)).run(move || {
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let context = context_1.clone();
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async move {
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overwrite_deleted_posts_and_comments(&mut context.pool()).await;
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delete_old_denied_users(&mut context.pool()).await;
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update_instance_software(&mut context.pool(), context.client())
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.await
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.inspect_err(|e| warn!("Failed to update instance software: {e}"))
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.ok();
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}
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});
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// Manually run the scheduler in an event loop
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loop {
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scheduler.run_pending().await;
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tokio::time::sleep(Duration::from_millis(1000)).await;
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}
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}
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/// Run these on server startup
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async fn startup_jobs(pool: &mut DbPool<'_>) {
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active_counts(pool).await;
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update_hot_ranks(pool).await;
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update_banned_when_expired(pool).await;
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clear_old_activities(pool).await;
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overwrite_deleted_posts_and_comments(pool).await;
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delete_old_denied_users(pool).await;
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}
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/// Update the hot_rank columns for the aggregates tables
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/// Runs in batches until all necessary rows are updated once
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async fn update_hot_ranks(pool: &mut DbPool<'_>) {
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info!("Updating hot ranks for all history...");
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let conn = get_conn(pool).await;
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match conn {
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Ok(mut conn) => {
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process_post_aggregates_ranks_in_batches(&mut conn).await;
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process_ranks_in_batches(
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&mut conn,
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"comment",
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"a.hot_rank != 0",
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"SET hot_rank = r.hot_rank(a.score, a.published)",
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)
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.await;
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process_ranks_in_batches(
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&mut conn,
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"community",
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"a.hot_rank != 0",
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"SET hot_rank = r.hot_rank(a.subscribers, a.published)",
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)
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.await;
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info!("Finished hot ranks update!");
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}
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Err(e) => {
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error!("Failed to get connection from pool: {e}");
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}
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}
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}
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#[derive(QueryableByName)]
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struct HotRanksUpdateResult {
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#[diesel(sql_type = Timestamptz)]
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published: DateTime<Utc>,
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}
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/// Runs the hot rank update query in batches until all rows have been processed.
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/// In `where_clause` and `set_clause`, "a" will refer to the current aggregates table.
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/// Locked rows are skipped in order to prevent deadlocks (they will likely get updated on the next
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/// run)
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async fn process_ranks_in_batches(
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conn: &mut AsyncPgConnection,
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table_name: &str,
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where_clause: &str,
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set_clause: &str,
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) {
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let process_start_time: DateTime<Utc> = Utc
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.timestamp_opt(0, 0)
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.single()
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.expect("0 timestamp creation");
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let update_batch_size = 1000; // Bigger batches than this tend to cause seq scans
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let mut processed_rows_count = 0;
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let mut previous_batch_result = Some(process_start_time);
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while let Some(previous_batch_last_published) = previous_batch_result {
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// Raw `sql_query` is used as a performance optimization - Diesel does not support doing this
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// in a single query (neither as a CTE, nor using a subquery)
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let result = sql_query(format!(
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r#"WITH batch AS (SELECT a.{id_column}
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FROM {aggregates_table} a
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WHERE a.published > $1 AND ({where_clause})
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ORDER BY a.published
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LIMIT $2
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FOR UPDATE SKIP LOCKED)
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UPDATE {aggregates_table} a {set_clause}
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FROM batch WHERE a.{id_column} = batch.{id_column} RETURNING a.published;
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"#,
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id_column = format!("{table_name}_id"),
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aggregates_table = format!("{table_name}_aggregates"),
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set_clause = set_clause,
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where_clause = where_clause
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))
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.bind::<Timestamptz, _>(previous_batch_last_published)
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.bind::<Integer, _>(update_batch_size)
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.get_results::<HotRanksUpdateResult>(conn)
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.await;
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match result {
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Ok(updated_rows) => {
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processed_rows_count += updated_rows.len();
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previous_batch_result = updated_rows.last().map(|row| row.published);
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}
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Err(e) => {
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error!("Failed to update {} hot_ranks: {}", table_name, e);
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break;
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}
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}
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}
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info!(
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"Finished process_hot_ranks_in_batches execution for {} (processed {} rows)",
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table_name, processed_rows_count
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);
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}
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/// Post aggregates is a special case, since it needs to join to the community_aggregates
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/// table, to get the active monthly user counts.
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async fn process_post_aggregates_ranks_in_batches(conn: &mut AsyncPgConnection) {
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let process_start_time: DateTime<Utc> = Utc
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.timestamp_opt(0, 0)
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.single()
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.expect("0 timestamp creation");
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let update_batch_size = 1000; // Bigger batches than this tend to cause seq scans
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let mut processed_rows_count = 0;
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let mut previous_batch_result = Some(process_start_time);
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while let Some(previous_batch_last_published) = previous_batch_result {
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let result = sql_query(
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r#"WITH batch AS (SELECT pa.post_id
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FROM post_aggregates pa
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WHERE pa.published > $1
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AND (pa.hot_rank != 0 OR pa.hot_rank_active != 0)
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ORDER BY pa.published
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LIMIT $2
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FOR UPDATE SKIP LOCKED)
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UPDATE post_aggregates pa
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SET hot_rank = r.hot_rank(pa.score, pa.published),
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hot_rank_active = r.hot_rank(pa.score, pa.newest_comment_time_necro),
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scaled_rank = r.scaled_rank(pa.score, pa.published, ca.users_active_month)
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FROM batch, community_aggregates ca
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WHERE pa.post_id = batch.post_id and pa.community_id = ca.community_id RETURNING pa.published;
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"#,
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)
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.bind::<Timestamptz, _>(previous_batch_last_published)
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.bind::<Integer, _>(update_batch_size)
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.get_results::<HotRanksUpdateResult>(conn)
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.await;
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match result {
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Ok(updated_rows) => {
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processed_rows_count += updated_rows.len();
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previous_batch_result = updated_rows.last().map(|row| row.published);
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}
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Err(e) => {
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error!("Failed to update {} hot_ranks: {}", "post_aggregates", e);
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break;
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}
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}
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}
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info!(
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"Finished process_hot_ranks_in_batches execution for {} (processed {} rows)",
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"post_aggregates", processed_rows_count
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);
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}
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async fn delete_expired_captcha_answers(pool: &mut DbPool<'_>) {
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let conn = get_conn(pool).await;
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match conn {
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Ok(mut conn) => {
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diesel::delete(
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captcha_answer::table
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.filter(captcha_answer::published.lt(now() - IntervalDsl::minutes(10))),
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)
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.execute(&mut conn)
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.await
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.map(|_| {
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info!("Done.");
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})
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.inspect_err(|e| error!("Failed to clear old captcha answers: {e}"))
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.ok();
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}
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Err(e) => {
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error!("Failed to get connection from pool: {e}");
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}
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}
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}
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/// Clear old activities (this table gets very large)
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async fn clear_old_activities(pool: &mut DbPool<'_>) {
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info!("Clearing old activities...");
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let conn = get_conn(pool).await;
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match conn {
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Ok(mut conn) => {
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diesel::delete(
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sent_activity::table.filter(sent_activity::published.lt(now() - IntervalDsl::days(7))),
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)
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.execute(&mut conn)
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.await
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.inspect_err(|e| error!("Failed to clear old sent activities: {e}"))
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.ok();
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diesel::delete(
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received_activity::table
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.filter(received_activity::published.lt(now() - IntervalDsl::days(7))),
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)
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.execute(&mut conn)
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.await
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.map(|_| info!("Done."))
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.inspect_err(|e| error!("Failed to clear old received activities: {e}"))
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.ok();
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}
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Err(e) => {
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error!("Failed to get connection from pool: {e}");
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}
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}
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}
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async fn delete_old_denied_users(pool: &mut DbPool<'_>) {
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LocalUser::delete_old_denied_local_users(pool)
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.await
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.map(|_| {
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info!("Done.");
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})
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.inspect_err(|e| error!("Failed to deleted old denied users: {e}"))
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.ok();
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}
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/// overwrite posts and comments 30d after deletion
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async fn overwrite_deleted_posts_and_comments(pool: &mut DbPool<'_>) {
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info!("Overwriting deleted posts...");
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let conn = get_conn(pool).await;
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match conn {
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Ok(mut conn) => {
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diesel::update(
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post::table
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.filter(post::deleted.eq(true))
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.filter(post::updated.lt(now().nullable() - 1.months()))
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.filter(post::body.ne(DELETED_REPLACEMENT_TEXT)),
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)
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.set((
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post::body.eq(DELETED_REPLACEMENT_TEXT),
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post::name.eq(DELETED_REPLACEMENT_TEXT),
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))
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.execute(&mut conn)
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.await
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.map(|_| {
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info!("Done.");
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})
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.inspect_err(|e| error!("Failed to overwrite deleted posts: {e}"))
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.ok();
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info!("Overwriting deleted comments...");
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diesel::update(
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comment::table
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.filter(comment::deleted.eq(true))
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.filter(comment::updated.lt(now().nullable() - 1.months()))
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.filter(comment::content.ne(DELETED_REPLACEMENT_TEXT)),
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)
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.set(comment::content.eq(DELETED_REPLACEMENT_TEXT))
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.execute(&mut conn)
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.await
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.map(|_| {
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info!("Done.");
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})
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.inspect_err(|e| error!("Failed to overwrite deleted comments: {e}"))
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.ok();
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}
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Err(e) => {
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error!("Failed to get connection from pool: {e}");
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}
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}
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}
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/// Re-calculate the site and community active counts every 12 hours
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async fn active_counts(pool: &mut DbPool<'_>) {
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info!("Updating active site and community aggregates ...");
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let conn = get_conn(pool).await;
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match conn {
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Ok(mut conn) => {
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let intervals = vec![
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("1 day", "day"),
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("1 week", "week"),
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("1 month", "month"),
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("6 months", "half_year"),
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];
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for i in &intervals {
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let update_site_stmt = format!(
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"update site_aggregates set users_active_{} = (select * from site_aggregates_activity('{}')) where site_id = 1",
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i.1, i.0
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);
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sql_query(update_site_stmt)
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.execute(&mut conn)
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.await
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.inspect_err(|e| error!("Failed to update site stats: {e}"))
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.ok();
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let update_community_stmt = format!("update community_aggregates ca set users_active_{} = mv.count_ from community_aggregates_activity('{}') mv where ca.community_id = mv.community_id_", i.1, i.0);
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sql_query(update_community_stmt)
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.execute(&mut conn)
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.await
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.inspect_err(|e| error!("Failed to update community stats: {e}"))
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.ok();
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}
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info!("Done.");
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}
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Err(e) => {
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error!("Failed to get connection from pool: {e}");
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}
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}
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}
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/// Set banned to false after ban expires
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async fn update_banned_when_expired(pool: &mut DbPool<'_>) {
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info!("Updating banned column if it expires ...");
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let conn = get_conn(pool).await;
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match conn {
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Ok(mut conn) => {
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diesel::update(
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person::table
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.filter(person::banned.eq(true))
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.filter(person::ban_expires.lt(now().nullable())),
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)
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.set(person::banned.eq(false))
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.execute(&mut conn)
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.await
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.inspect_err(|e| error!("Failed to update person.banned when expires: {e}"))
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.ok();
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diesel::delete(
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community_person_ban::table.filter(community_person_ban::expires.lt(now().nullable())),
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)
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.execute(&mut conn)
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.await
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.inspect_err(|e| error!("Failed to remove community_ban expired rows: {e}"))
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.ok();
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}
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Err(e) => {
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error!("Failed to get connection from pool: {e}");
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}
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}
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}
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|
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/// Find all unpublished posts with scheduled date in the future, and publish them.
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async fn publish_scheduled_posts(context: &Data<LemmyContext>) {
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let pool = &mut context.pool();
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let conn = get_conn(pool).await;
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|
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match conn {
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Ok(mut conn) => {
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let scheduled_posts: Vec<_> = post::table
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.inner_join(community::table)
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.inner_join(person::table)
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// find all posts which have scheduled_publish_time that is in the past
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.filter(post::scheduled_publish_time.is_not_null())
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.filter(coalesce(post::scheduled_publish_time, now()).lt(now()))
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// make sure the post, person and community are still around
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.filter(not(post::deleted.or(post::removed)))
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.filter(not(person::banned.or(person::deleted)))
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.filter(not(community::removed.or(community::deleted)))
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// ensure that user isnt banned from community
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.filter(not(exists(
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community_person_ban::table
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.filter(community_person_ban::community_id.eq(community::id))
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.filter(community_person_ban::person_id.eq(person::id)),
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)))
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.select((post::all_columns, community::all_columns))
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.get_results::<(Post, Community)>(&mut conn)
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.await
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.inspect_err(|e| error!("Failed to read unpublished posts: {e}"))
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.ok()
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.unwrap_or_default();
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for (post, community) in scheduled_posts {
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// mark post as published in db
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let form = PostUpdateForm {
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scheduled_publish_time: Some(None),
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..Default::default()
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};
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Post::update(&mut context.pool(), post.id, &form)
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.await
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.inspect_err(|e| error!("Failed update scheduled post: {e}"))
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.ok();
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|
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// send out post via federation and webmention
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let send_activity = SendActivityData::CreatePost(post.clone());
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ActivityChannel::submit_activity(send_activity, context)
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.await
|
|
.inspect_err(|e| error!("Failed federate scheduled post: {e}"))
|
|
.ok();
|
|
send_webmention(post, community);
|
|
}
|
|
}
|
|
Err(e) => {
|
|
error!("Failed to get connection from pool: {e}");
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Updates the instance software and version.
|
|
///
|
|
/// Does so using the /.well-known/nodeinfo protocol described here:
|
|
/// https://github.com/jhass/nodeinfo/blob/main/PROTOCOL.md
|
|
///
|
|
/// TODO: if instance has been dead for a long time, it should be checked less frequently
|
|
async fn update_instance_software(
|
|
pool: &mut DbPool<'_>,
|
|
client: &ClientWithMiddleware,
|
|
) -> LemmyResult<()> {
|
|
info!("Updating instances software and versions...");
|
|
let conn = get_conn(pool).await;
|
|
|
|
match conn {
|
|
Ok(mut conn) => {
|
|
let instances = instance::table.get_results::<Instance>(&mut conn).await?;
|
|
|
|
for instance in instances {
|
|
if let Some(form) = build_update_instance_form(&instance.domain, client).await {
|
|
Instance::update(pool, instance.id, form).await?;
|
|
}
|
|
}
|
|
info!("Finished updating instances software and versions...");
|
|
}
|
|
Err(e) => {
|
|
error!("Failed to get connection from pool: {e}");
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
/// This builds an instance update form, for a given domain.
|
|
/// If the instance sends a response, but doesn't have a well-known or nodeinfo,
|
|
/// Then return a default form with only the updated field.
|
|
async fn build_update_instance_form(
|
|
domain: &str,
|
|
client: &ClientWithMiddleware,
|
|
) -> Option<InstanceForm> {
|
|
// The `updated` column is used to check if instances are alive. If it is more than three
|
|
// days in the past, no outgoing activities will be sent to that instance. However
|
|
// not every Fediverse instance has a valid Nodeinfo endpoint (its not required for
|
|
// Activitypub). That's why we always need to mark instances as updated if they are
|
|
// alive.
|
|
let mut instance_form = InstanceForm {
|
|
updated: Some(naive_now()),
|
|
..InstanceForm::new(domain.to_string())
|
|
};
|
|
|
|
// First, fetch their /.well-known/nodeinfo, then extract the correct nodeinfo link from it
|
|
let well_known_url = format!("https://{}/.well-known/nodeinfo", domain);
|
|
|
|
let Ok(res) = client.get(&well_known_url).send().await else {
|
|
// This is the only kind of error that means the instance is dead
|
|
return None;
|
|
};
|
|
|
|
// In this block, returning `None` is ignored, and only means not writing nodeinfo to db
|
|
async {
|
|
if res.status().is_client_error() {
|
|
return None;
|
|
}
|
|
|
|
let node_info_url = res
|
|
.json::<NodeInfoWellKnown>()
|
|
.await
|
|
.ok()?
|
|
.links
|
|
.into_iter()
|
|
.find(|links| {
|
|
links
|
|
.rel
|
|
.as_str()
|
|
.starts_with("http://nodeinfo.diaspora.software/ns/schema/2.")
|
|
})?
|
|
.href;
|
|
|
|
let software = client
|
|
.get(node_info_url)
|
|
.send()
|
|
.await
|
|
.ok()?
|
|
.json::<NodeInfo>()
|
|
.await
|
|
.ok()?
|
|
.software?;
|
|
|
|
instance_form.software = software.name;
|
|
instance_form.version = software.version;
|
|
|
|
Some(())
|
|
}
|
|
.await;
|
|
|
|
Some(instance_form)
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
|
|
use crate::scheduled_tasks::build_update_instance_form;
|
|
use lemmy_api_common::request::client_builder;
|
|
use lemmy_utils::{error::LemmyResult, settings::structs::Settings, LemmyErrorType};
|
|
use pretty_assertions::assert_eq;
|
|
use reqwest_middleware::ClientBuilder;
|
|
use serial_test::serial;
|
|
|
|
#[tokio::test]
|
|
#[serial]
|
|
async fn test_nodeinfo_lemmy_ml() -> LemmyResult<()> {
|
|
let client = ClientBuilder::new(client_builder(&Settings::default()).build()?).build();
|
|
let form = build_update_instance_form("lemmy.ml", &client)
|
|
.await
|
|
.ok_or(LemmyErrorType::NotFound)?;
|
|
assert_eq!(form.software.ok_or(LemmyErrorType::NotFound)?, "lemmy");
|
|
Ok(())
|
|
}
|
|
|
|
#[tokio::test]
|
|
#[serial]
|
|
async fn test_nodeinfo_mastodon_social() -> LemmyResult<()> {
|
|
let client = ClientBuilder::new(client_builder(&Settings::default()).build()?).build();
|
|
let form = build_update_instance_form("mastodon.social", &client)
|
|
.await
|
|
.ok_or(LemmyErrorType::NotFound)?;
|
|
assert_eq!(form.software.ok_or(LemmyErrorType::NotFound)?, "mastodon");
|
|
Ok(())
|
|
}
|
|
}
|