Merge branch 'download-avatars' into 'master'
Add a download_avatars example See merge request xmpp-rs/tokio-xmpp!5
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Astro
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1 changed files with 230 additions and 0 deletions
230
examples/download_avatars.rs
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230
examples/download_avatars.rs
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use futures::{future, Future, Sink, Stream};
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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::runtime::current_thread::Runtime;
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use tokio_xmpp::{Client, Packet};
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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, Feature, Identity},
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hashes::Algo,
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iq::{Iq, IqType},
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message::Message,
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ns,
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presence::{Presence, Type as PresenceType},
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pubsub::{
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event::PubSubEvent,
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pubsub::{Items, PubSub},
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NodeName,
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},
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stanza_error::{StanzaError, ErrorType, DefinedCondition},
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Jid, TryFrom,
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};
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fn main() {
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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 = &args[1];
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let password = &args[2];
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// tokio_core context
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let mut rt = Runtime::new().unwrap();
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// Client instance
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let client = Client::new(jid, password).unwrap();
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// Make the two interfaces for sending and receiving independent
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// of each other so we can move one into a closure.
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let (sink, stream) = client.split();
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// Create outgoing pipe
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let (mut tx, rx) = futures::unsync::mpsc::unbounded();
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rt.spawn(
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rx.forward(
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sink.sink_map_err(|_| panic!("Pipe"))
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)
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.map(|(rx, mut sink)| {
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drop(rx);
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let _ = sink.close();
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})
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.map_err(|e| {
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panic!("Send error: {:?}", e);
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})
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);
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let disco_info = make_disco();
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// Main loop, processes events
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let mut wait_for_stream_end = false;
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let done = stream.for_each(move |event| {
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// Helper function to send an iq error.
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let mut send_error = |to, id, type_, condition, text: &str| {
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let error = StanzaError::new(type_, condition, "en", text);
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let iq = Iq::from_error(id, error)
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.with_to(to);
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tx.start_send(Packet::Stanza(iq.into())).unwrap();
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};
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if wait_for_stream_end {
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/* Do nothing */
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} else 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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tx.start_send(Packet::Stanza(presence.into())).unwrap();
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} else if let Some(stanza) = event.into_stanza() {
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if stanza.is("iq", "jabber:client") {
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let iq = Iq::try_from(stanza).unwrap();
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if let IqType::Get(payload) = iq.payload {
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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(iq.id, Some(disco))
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.with_to(iq.from.unwrap());
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tx.start_send(Packet::Stanza(iq.into())).unwrap();
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},
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Err(err) => {
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send_error(iq.from.unwrap(), iq.id, ErrorType::Modify, DefinedCondition::BadRequest, &format!("{}", err));
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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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send_error(iq.from.unwrap(), iq.id, ErrorType::Cancel, DefinedCondition::ServiceUnavailable, "No handler defined for this kind of iq.");
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}
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} else if let IqType::Result(Some(payload)) = iq.payload {
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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 =
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iq.from.clone().unwrap_or(Jid::from_str(jid).unwrap());
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handle_iq_result(pubsub, &from);
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}
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} else if let IqType::Set(_) = iq.payload {
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// We MUST answer unhandled set iqs with a service-unavailable error.
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send_error(iq.from.unwrap(), iq.id, ErrorType::Cancel, DefinedCondition::ServiceUnavailable, "No handler defined for this kind of iq.");
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}
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} else if stanza.is("message", "jabber:client") {
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let message = Message::try_from(stanza).unwrap();
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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.1 .0 == "die" {
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println!("Secret die command triggered by {}", from);
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wait_for_stream_end = true;
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tx.start_send(Packet::StreamEnd).unwrap();
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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 = PubSubEvent::try_from(child).unwrap();
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if let PubSubEvent::PublishedItems { node, items } = event {
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if node.0 == ns::AVATAR_METADATA {
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for item in items {
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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 = 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
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);
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let iq = download_avatar(&from);
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tx.start_send(Packet::Stanza(iq.into())).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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} else if stanza.is("presence", "jabber:client") {
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// Nothing to do here.
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} else {
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panic!("Unknown stanza: {}", String::from(&stanza));
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}
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}
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future::ok(())
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});
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// Start polling `done`
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match rt.block_on(done) {
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Ok(_) => (),
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Err(e) => {
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println!("Fatal: {}", e);
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()
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}
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}
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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 = vec![
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Feature::new(ns::DISCO_INFO),
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Feature::new(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)
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.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("coucou", 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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.with_to(from.clone())
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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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if let Some(id) = item.id.clone() {
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if let Some(payload) = &item.payload {
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let data = AvatarData::try_from(payload.clone()).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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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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