136 lines
4.9 KiB
Rust
136 lines
4.9 KiB
Rust
use std::{collections::HashSet, convert::TryFrom, time::SystemTime};
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use crate::{server_server, utils, Error, Result};
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use federation::transactions::send_transaction_message;
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use log::warn;
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use rocket::futures::stream::{FuturesUnordered, StreamExt};
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use ruma::{api::federation, Raw, ServerName};
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use sled::IVec;
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use tokio::select;
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pub struct Sending {
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/// The state for a given state hash.
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pub(super) serverpduids: sled::Tree, // ServerPduId = ServerName + PduId
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}
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impl Sending {
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pub fn start_handler(&self, globals: &super::globals::Globals, rooms: &super::rooms::Rooms) {
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let serverpduids = self.serverpduids.clone();
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let rooms = rooms.clone();
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let globals = globals.clone();
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tokio::spawn(async move {
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let mut futures = FuturesUnordered::new();
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let mut waiting_servers = HashSet::new();
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let mut subscriber = serverpduids.watch_prefix(b"");
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loop {
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select! {
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Some(server) = futures.next() => {
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warn!("response: {:?}", &server);
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match server {
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Ok((server, _response)) => {
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waiting_servers.remove(&server)
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}
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Err((server, _e)) => {
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waiting_servers.remove(&server)
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}
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};
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},
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Some(event) = &mut subscriber => {
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if let sled::Event::Insert { key, .. } = event {
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let serverpduid = key.clone();
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let mut parts = serverpduid.splitn(2, |&b| b == 0xff);
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if let Some((server, pdu_id)) = utils::string_from_bytes(
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parts
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.next()
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.expect("splitn will always return 1 or more elements"),
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)
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.map_err(|_| Error::bad_database("ServerName in serverpduid bytes are invalid."))
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.and_then(|server_str|Box::<ServerName>::try_from(server_str)
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.map_err(|_| Error::bad_database("ServerName in serverpduid is invalid.")))
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.ok()
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.filter(|server| waiting_servers.insert(server.clone()))
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.and_then(|server| parts
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.next()
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.ok_or_else(|| Error::bad_database("Invalid serverpduid in db.")).ok().map(|pdu_id| (server, pdu_id)))
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{
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futures.push(Self::handle_event(server, pdu_id.into(), &globals, &rooms));
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}
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}
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}
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}
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}
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});
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}
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pub fn send_pdu(&self, server: Box<ServerName>, pdu_id: &[u8]) -> Result<()> {
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let mut key = server.as_bytes().to_vec();
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key.push(0xff);
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key.extend_from_slice(pdu_id);
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self.serverpduids.insert(key, b"")?;
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Ok(())
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}
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async fn handle_event(
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server: Box<ServerName>,
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pdu_id: IVec,
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globals: &super::globals::Globals,
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rooms: &super::rooms::Rooms,
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) -> std::result::Result<
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(Box<ServerName>, send_transaction_message::v1::Response),
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(Box<ServerName>, Error),
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> {
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let mut pdu_json = rooms
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.get_pdu_json_from_id(&pdu_id)
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.map_err(|e| (server.clone(), e))?
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.ok_or_else(|| {
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(
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server.clone(),
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Error::bad_database("Event in serverpduids not found in db."),
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)
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})?;
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if let Some(unsigned) = pdu_json
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.as_object_mut()
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.expect("json is object")
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.get_mut("unsigned")
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{
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unsigned
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.as_object_mut()
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.expect("unsigned is object")
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.remove("transaction_id");
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}
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pdu_json
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.as_object_mut()
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.expect("json is object")
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.remove("event_id");
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let raw_json =
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serde_json::from_value::<Raw<_>>(pdu_json).expect("Raw::from_value always works");
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let globals = &globals;
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let pdus = vec![raw_json];
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let transaction_id = utils::random_string(16);
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server_server::send_request(
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&globals,
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server.clone(),
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send_transaction_message::v1::Request {
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origin: globals.server_name(),
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pdus: &pdus,
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edus: &[],
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origin_server_ts: SystemTime::now(),
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transaction_id: &transaction_id,
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},
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)
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.await
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.map(|response| (server.clone(), response))
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.map_err(|e| (server, e))
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}
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}
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