mirror of
https://github.com/LemmyNet/activitypub-federation-rust.git
synced 2024-05-04 10:18:46 +00:00
198 lines
6 KiB
Rust
198 lines
6 KiB
Rust
use crate::{
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core::signatures::{sign_request, PublicKey},
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Error,
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LocalInstance,
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APUB_JSON_CONTENT_TYPE,
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};
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use anyhow::anyhow;
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use background_jobs::{
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memory_storage::Storage,
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ActixJob,
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Backoff,
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Manager,
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MaxRetries,
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WorkerConfig,
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};
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use http::{header::HeaderName, HeaderMap, HeaderValue};
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use reqwest_middleware::ClientWithMiddleware;
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use serde::{Deserialize, Serialize};
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use std::{fmt::Debug, future::Future, pin::Pin, time::Duration};
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use tracing::{info, warn};
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use url::Url;
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/// Necessary data for sending out an activity
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#[derive(Debug)]
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pub struct SendActivity {
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/// Id of the sent activity, used for logging
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pub activity_id: Url,
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/// Public key and actor id of the sender
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pub actor_public_key: PublicKey,
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/// Signing key of sender for HTTP signatures
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pub actor_private_key: String,
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/// List of Activitypub inboxes that the activity gets delivered to
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pub inboxes: Vec<Url>,
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/// Activity json
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pub activity: String,
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}
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impl SendActivity {
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/// Send out the given activity to all inboxes, automatically generating the HTTP signatures. By
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/// default, sending is done on a background thread, and automatically retried on failure with
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/// exponential backoff.
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///
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/// For debugging or testing, you might want to set [[InstanceSettings.testing_send_sync]].
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pub async fn send(self, instance: &LocalInstance) -> Result<(), Error> {
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let activity_queue = &instance.activity_queue;
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for inbox in self.inboxes {
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let message = SendActivityTask {
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activity_id: self.activity_id.clone(),
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inbox,
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activity: self.activity.clone(),
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public_key: self.actor_public_key.clone(),
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private_key: self.actor_private_key.clone(),
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};
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if instance.settings.testing_send_sync {
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let res =
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do_send(message, &instance.client, instance.settings.request_timeout).await;
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// Don't fail on error, as we intentionally do some invalid actions in tests, to verify that
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// they are rejected on the receiving side. These errors shouldn't bubble up to make the API
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// call fail. This matches the behaviour in production.
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if let Err(e) = res {
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warn!("{}", e);
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}
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} else {
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activity_queue.queue::<SendActivityTask>(message).await?;
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let stats = activity_queue.get_stats().await?;
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info!(
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"Activity queue stats: pending: {}, running: {}, dead (this hour): {}, complete (this hour): {}",
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stats.pending,
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stats.running,
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stats.dead.this_hour(),
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stats.complete.this_hour()
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);
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}
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}
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Ok(())
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}
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}
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#[derive(Clone, Debug, Deserialize, Serialize)]
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struct SendActivityTask {
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activity_id: Url,
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inbox: Url,
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activity: String,
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public_key: PublicKey,
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private_key: String,
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}
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/// Signs the activity with the sending actor's key, and delivers to the given inbox. Also retries
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/// if the delivery failed.
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impl ActixJob for SendActivityTask {
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type State = MyState;
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type Future = Pin<Box<dyn Future<Output = Result<(), anyhow::Error>>>>;
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const NAME: &'static str = "SendActivityTask";
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/// With these params, retries are made at the following intervals:
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/// 3s
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/// 9s
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/// 27s
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/// 1m 21s
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/// 4m 3s
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/// 12m 9s
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/// 36m 27s
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/// 1h 49m 21s
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/// 5h 28m 3s
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/// 16h 24m 9s
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const MAX_RETRIES: MaxRetries = MaxRetries::Count(10);
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const BACKOFF: Backoff = Backoff::Exponential(3);
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fn run(self, state: Self::State) -> Self::Future {
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Box::pin(async move { do_send(self, &state.client, state.timeout).await })
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}
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}
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async fn do_send(
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task: SendActivityTask,
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client: &ClientWithMiddleware,
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timeout: Duration,
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) -> Result<(), anyhow::Error> {
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info!("Sending {} to {}", task.activity_id, task.inbox);
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let request_builder = client
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.post(&task.inbox.to_string())
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.timeout(timeout)
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.headers(generate_request_headers(&task.inbox));
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let request = sign_request(
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request_builder,
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task.activity.clone(),
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task.public_key.clone(),
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task.private_key.to_owned(),
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)
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.await?;
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let response = client.execute(request).await;
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match response {
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Ok(o) => {
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if o.status().is_success() {
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Ok(())
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} else {
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let status = o.status();
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let text = o.text().await.map_err(Error::conv)?;
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Err(anyhow!(
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"Send {} to {} failed with status {}: {}",
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task.activity_id,
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task.inbox,
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status,
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text,
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))
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}
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}
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Err(e) => Err(anyhow!(
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"Failed to send activity {} to {}: {}",
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&task.activity_id,
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task.inbox,
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e
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)),
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}
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}
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fn generate_request_headers(inbox_url: &Url) -> HeaderMap {
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let mut host = inbox_url.domain().expect("read inbox domain").to_string();
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if let Some(port) = inbox_url.port() {
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host = format!("{}:{}", host, port);
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}
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let mut headers = HeaderMap::new();
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headers.insert(
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HeaderName::from_static("content-type"),
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HeaderValue::from_static(APUB_JSON_CONTENT_TYPE),
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);
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headers.insert(
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HeaderName::from_static("host"),
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HeaderValue::from_str(&host).expect("Hostname is valid"),
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);
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headers
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}
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pub(crate) fn create_activity_queue(
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client: ClientWithMiddleware,
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worker_count: u64,
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timeout: Duration,
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) -> Manager {
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// Configure and start our workers
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WorkerConfig::new_managed(Storage::new(), move |_| MyState {
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client: client.clone(),
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timeout,
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})
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.register::<SendActivityTask>()
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.set_worker_count("default", worker_count)
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.start()
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}
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#[derive(Clone)]
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struct MyState {
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client: ClientWithMiddleware,
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timeout: Duration,
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}
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