bc88134c41
Features must never be duplicated, so we can use a BTreeSet instead of a Vec to be nicer for users. It makes the internal API for computing caps and ecaps2 a bit worse, because it was expecting a slice directly, so for now let’s collect the BTreeSet into a Vec when computing the thing. A refactor to use Iterator might make it better eventually, but I won’t work on that before profiling it.
254 lines
9.4 KiB
Rust
254 lines
9.4 KiB
Rust
use futures::stream::StreamExt;
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use std::collections::BTreeSet;
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use std::env::args;
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use std::fs::{create_dir_all, File};
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use std::io::{self, Write};
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use std::process::exit;
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use std::str::FromStr;
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use tokio_xmpp::rustls;
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use tokio_xmpp::{Client, Stanza};
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use xmpp_parsers::{
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avatar::{Data as AvatarData, Metadata as AvatarMetadata},
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caps::{compute_disco, hash_caps, Caps},
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disco::{DiscoInfoQuery, DiscoInfoResult, Identity},
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hashes::Algo,
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iq::Iq,
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jid::{BareJid, Jid},
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ns,
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presence::{Presence, Type as PresenceType},
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pubsub::{
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self,
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pubsub::{Items, PubSub},
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NodeName,
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},
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stanza_error::{DefinedCondition, ErrorType, StanzaError},
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};
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#[tokio::main]
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async fn main() {
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env_logger::init();
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rustls::crypto::aws_lc_rs::default_provider()
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.install_default()
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.expect("failed to install rustls crypto provider");
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let args: Vec<String> = args().collect();
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if args.len() != 3 {
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println!("Usage: {} <jid> <password>", args[0]);
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exit(1);
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}
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let jid = BareJid::from_str(&args[1]).expect(&format!("Invalid JID: {}", &args[1]));
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let password = args[2].clone();
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// Client instance
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let mut client = Client::new(jid.clone(), password);
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let disco_info = make_disco();
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// Main loop, processes events
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while let Some(event) = client.next().await {
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if event.is_online() {
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println!("Online!");
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let caps = get_disco_caps(&disco_info, "https://gitlab.com/xmpp-rs/tokio-xmpp");
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let presence = make_presence(caps);
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client.send_stanza(presence.into()).await.unwrap();
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} else if let Some(stanza) = event.into_stanza() {
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match stanza {
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Stanza::Iq(Iq::Get {
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payload, id, from, ..
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}) => {
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if payload.is("query", ns::DISCO_INFO) {
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let query = DiscoInfoQuery::try_from(payload);
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match query {
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Ok(query) => {
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let mut disco = disco_info.clone();
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disco.node = query.node;
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let iq = Iq::from_result(id, Some(disco)).with_to(from.unwrap());
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client.send_stanza(iq.into()).await.unwrap();
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}
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Err(err) => {
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client
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.send_stanza(
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make_error(
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from.unwrap(),
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id,
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ErrorType::Modify,
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DefinedCondition::BadRequest,
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&format!("{}", err),
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)
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.into(),
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)
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.await
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.unwrap();
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}
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}
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} else {
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// We MUST answer unhandled get iqs with a service-unavailable error.
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client
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.send_stanza(
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make_error(
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from.unwrap(),
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id,
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ErrorType::Cancel,
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DefinedCondition::ServiceUnavailable,
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"No handler defined for this kind of iq.",
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)
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.into(),
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)
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.await
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.unwrap();
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}
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}
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Stanza::Iq(Iq::Result {
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payload: Some(payload),
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from,
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..
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}) => {
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if payload.is("pubsub", ns::PUBSUB) {
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let pubsub = PubSub::try_from(payload).unwrap();
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let from = from.unwrap_or(jid.clone().into());
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handle_iq_result(pubsub, &from);
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}
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}
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Stanza::Iq(Iq::Set { from, id, .. }) => {
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// We MUST answer unhandled set iqs with a service-unavailable error.
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client
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.send_stanza(
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make_error(
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from.unwrap(),
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id,
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ErrorType::Cancel,
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DefinedCondition::ServiceUnavailable,
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"No handler defined for this kind of iq.",
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)
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.into(),
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)
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.await
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.unwrap();
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}
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Stanza::Iq(Iq::Error { .. }) | Stanza::Iq(Iq::Result { payload: None, .. }) => (),
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Stanza::Message(message) => {
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let from = message.from.clone().unwrap();
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if let Some(body) = message.get_best_body(vec!["en"]) {
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if body.0 == "die" {
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println!("Secret die command triggered by {}", from);
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break;
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}
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}
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for child in message.payloads {
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if child.is("event", ns::PUBSUB_EVENT) {
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let event = pubsub::Event::try_from(child).unwrap();
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if let pubsub::event::Payload::Items {
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node,
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published,
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retracted: _,
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} = event.payload
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{
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if node.0 == ns::AVATAR_METADATA {
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for item in published.into_iter() {
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let payload = item.payload.clone().unwrap();
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if payload.is("metadata", ns::AVATAR_METADATA) {
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// TODO: do something with these metadata.
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let _metadata =
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AvatarMetadata::try_from(payload).unwrap();
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println!(
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"[1m{}[0m has published an avatar, downloading...",
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from.clone()
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);
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let iq = download_avatar(from.clone());
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client.send_stanza(iq.into()).await.unwrap();
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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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// Nothing to do here.
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Stanza::Presence(_) => (),
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}
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}
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}
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}
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fn make_error(
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to: Jid,
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id: String,
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type_: ErrorType,
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condition: DefinedCondition,
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text: &str,
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) -> Iq {
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let error = StanzaError::new(type_, condition, "en", text);
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Iq::from_error(id, error).with_to(to)
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}
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fn make_disco() -> DiscoInfoResult {
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let identities = vec![Identity::new("client", "bot", "en", "tokio-xmpp")];
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let features = BTreeSet::from([
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String::from(ns::DISCO_INFO),
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format!("{}+notify", ns::AVATAR_METADATA),
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]);
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DiscoInfoResult {
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node: None,
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identities,
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features,
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extensions: vec![],
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}
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}
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fn get_disco_caps(disco: &DiscoInfoResult, node: &str) -> Caps {
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let caps_data = compute_disco(disco);
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let hash = hash_caps(&caps_data, Algo::Sha_1).unwrap();
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Caps::new(node, hash)
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}
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// Construct a <presence/>
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fn make_presence(caps: Caps) -> Presence {
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let mut presence = Presence::new(PresenceType::None).with_priority(-1);
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presence.set_status("en", "Downloading avatars.");
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presence.add_payload(caps);
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presence
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}
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fn download_avatar(from: Jid) -> Iq {
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Iq::from_get(
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"coucou",
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PubSub::Items(Items {
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max_items: None,
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node: NodeName(String::from(ns::AVATAR_DATA)),
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subid: None,
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items: Vec::new(),
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}),
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)
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.with_to(from)
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}
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fn handle_iq_result(pubsub: PubSub, from: &Jid) {
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if let PubSub::Items(items) = pubsub {
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if items.node.0 == ns::AVATAR_DATA {
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for item in items.items {
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match (item.id.clone(), item.payload.clone()) {
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(Some(id), Some(payload)) => {
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let data = AvatarData::try_from(payload).unwrap();
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save_avatar(from, id.0, &data.data).unwrap();
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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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// TODO: may use tokio?
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fn save_avatar(from: &Jid, id: String, data: &[u8]) -> io::Result<()> {
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let directory = format!("data/{}", from);
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let filename = format!("data/{}/{}", from, id);
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println!(
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"Saving avatar from [1m{}[0m to [4m{}[0m.",
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from, filename
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);
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create_dir_all(directory)?;
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let mut file = File::create(filename)?;
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file.write_all(data)
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}
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