feat(xmpp): serialization of stream start

src/projections/xmpp/mod.rs

@@ -1,19 +1,19 @@
 use std::collections::HashMap;
 use std::fs::File;
+use std::io::BufReader as SyncBufReader;
 use std::net::SocketAddr;
 use std::path::PathBuf;
-use std::io::BufReader as SyncBufReader;
 use std::sync::Arc;
 
 use futures_util::future::join_all;
 use prometheus::Registry as MetricsRegistry;
 use rustls_pemfile::{certs, rsa_private_keys};
 use serde::Deserialize;
-use tokio::io::{AsyncWriteExt, AsyncReadExt};
+use tokio::io::{AsyncReadExt, AsyncWriteExt};
 use tokio::net::{TcpListener, TcpStream};
 use tokio::sync::mpsc::channel;
-use tokio_rustls::TlsAcceptor;
 use tokio_rustls::rustls::{Certificate, PrivateKey};
+use tokio_rustls::TlsAcceptor;
 
 use crate::core::player::PlayerRegistry;
 use crate::core::room::RoomRegistry;
@@ -95,15 +95,22 @@ pub async fn launch(
             }
         }
         log::info!("Stopping XMPP projection");
-        join_all(actors.into_iter().map(|(socket_addr, terminator)| async move {
+        join_all(
-            log::debug!("Stopping XMPP connection at {socket_addr}");
+            actors
-            match terminator.terminate().await {
+                .into_iter()
-                Ok(_) => log::debug!("Stopped XMPP connection at {socket_addr}"),
+                .map(|(socket_addr, terminator)| async move {
-                Err(err) => {
+                    log::debug!("Stopping XMPP connection at {socket_addr}");
-                    log::warn!("XMPP connection to {socket_addr} finished with error: {err}")
+                    match terminator.terminate().await {
-                }
+                        Ok(_) => log::debug!("Stopped XMPP connection at {socket_addr}"),
-            }
+                        Err(err) => {
-        })).await;
+                            log::warn!(
+                                "XMPP connection to {socket_addr} finished with error: {err}"
+                            )
+                        }
+                    }
+                }),
+        )
+        .await;
         log::info!("Stopped XMPP projection");
         Ok(())
     });
@@ -136,7 +143,9 @@ async fn handle_socket(
             Ok(e) => println!("{} END", e),
             Err(_) => println!("{:?} END", &buf[0..i]),
         }
-        stream.write_all(br###"<proceed xmlns="urn:ietf:params:xml:ns:xmpp-tls"/>"###).await?;
+        stream
+            .write_all(br###"<proceed xmlns="urn:ietf:params:xml:ns:xmpp-tls"/>"###)
+            .await?;
     }
 
     let config = tokio_rustls::rustls::ServerConfig::builder()
@@ -155,11 +164,11 @@ async fn handle_socket(
     let mut new_stream = acceptor.accept(stream).await?;
     log::debug!("TLS connection established");
 
-
-
     loop {
         let i = new_stream.read(&mut buf).await?;
-        if i == 0 { break; }
+        if i == 0 {
+            break;
+        }
         match std::str::from_utf8(&buf[0..i]) {
             Ok(e) => println!("{} END", e),
             Err(_) => println!("{:?} END", &buf[0..i]),

src/protos/xmpp/client.rs

@@ -0,0 +1 @@
+pub static XMLNS: &'static str = "jabber:client";

src/protos/xmpp/mod.rs

@@ -1 +1,2 @@
+pub mod client;
 pub mod stream;

src/protos/xmpp/stream.rs

@@ -1,9 +1,15 @@
-use quick_xml::name::{ResolveResult, Namespace, LocalName, QName};
+use std::io::Write;
-use quick_xml::{Result, NsReader};
+
-use quick_xml::events::Event;
+use quick_xml::events::attributes::Attribute;
+use quick_xml::events::{BytesStart, Event};
+use quick_xml::name::{Namespace, QName, ResolveResult};
+use quick_xml::writer::Writer;
+use quick_xml::{NsReader, Result};
 use tokio::io::AsyncBufRead;
 
 pub static XMLNS: &'static str = "http://etherx.jabber.org/streams";
+pub static PREFIX: &'static str = "stream";
+pub static XMLNS_XML: &'static str = "http://www.w3.org/XML/1998/namespace";
 
 #[derive(Debug, PartialEq, Eq)]
 pub struct ClientStreamStart {
@@ -12,10 +18,13 @@ pub struct ClientStreamStart {
     pub version: String,
 }
 impl ClientStreamStart {
-    pub async fn parse(reader: &mut NsReader<impl AsyncBufRead + Unpin>, buf: &mut Vec<u8>) -> Result<ClientStreamStart>  {
+    pub async fn parse(
+        reader: &mut NsReader<impl AsyncBufRead + Unpin>,
+        buf: &mut Vec<u8>,
+    ) -> Result<ClientStreamStart> {
         if let Event::Start(e) = reader.read_event_into_async(buf).await? {
             let (ns, local) = reader.resolve_element(e.name());
-            if ns != ResolveResult::Bound(Namespace(XMLNS.as_bytes()))  {
+            if ns != ResolveResult::Bound(Namespace(XMLNS.as_bytes())) {
                 return Err(panic!());
             }
             if local.into_inner() != b"stream" {
@@ -31,35 +40,101 @@ impl ClientStreamStart {
                     (ResolveResult::Unbound, b"to") => {
                         let value = attr.unescape_value()?;
                         to = Some(value.to_string());
-                    },
+                    }
-                    (ResolveResult::Bound(Namespace(b"http://www.w3.org/XML/1998/namespace")), b"lang") => {
+                    (
+                        ResolveResult::Bound(Namespace(b"http://www.w3.org/XML/1998/namespace")),
+                        b"lang",
+                    ) => {
                         let value = attr.unescape_value()?;
                         lang = Some(value.to_string());
-                    },
+                    }
                     (ResolveResult::Unbound, b"version") => {
                         let value = attr.unescape_value()?;
                         version = Some(value.to_string());
-                    },
+                    }
-                    _ => {},
+                    _ => {}
                 }
             }
-            Ok(ClientStreamStart { to: to.unwrap(), lang: lang.unwrap(), version: version.unwrap() })
+            Ok(ClientStreamStart {
+                to: to.unwrap(),
+                lang: lang.unwrap(),
+                version: version.unwrap(),
+            })
         } else {
             Err(panic!())
         }
     }
 }
 
+pub struct ServerStreamStart {
+    pub from: String,
+    pub lang: String,
+    pub version: String,
+}
+impl ServerStreamStart {
+    pub fn write(&self, writer: &mut Writer<impl Write>) -> Result<()> {
+        let mut event = BytesStart::new("stream:stream");
+        let attributes = [
+            Attribute {
+                key: QName(b"from"),
+                value: self.from.as_bytes().into(),
+            },
+            Attribute {
+                key: QName(b"version"),
+                value: self.version.as_bytes().into(),
+            },
+            Attribute {
+                key: QName(b"xmlns"),
+                value: super::client::XMLNS.as_bytes().into(),
+            },
+            Attribute {
+                key: QName(b"xmlns:stream"),
+                value: XMLNS.as_bytes().into(),
+            },
+            Attribute {
+                key: QName(b"xml:lang"),
+                value: self.lang.as_bytes().into(),
+            },
+        ];
+        event.extend_attributes(attributes.into_iter());
+        writer.write_event(Event::Start(event))?;
+        Ok(())
+    }
+}
+
 #[cfg(test)]
 mod test {
     use super::*;
 
     #[tokio::test]
-    async fn stream_start_correct() {
+    async fn client_stream_start_correct_parse() {
         let input = r###"<stream:stream xmlns:stream="http://etherx.jabber.org/streams" to="vlnv.dev" version="1.0" xmlns="jabber:client" xml:lang="en" xmlns:xml="http://www.w3.org/XML/1998/namespace">"###;
         let mut reader = NsReader::from_reader(input.as_bytes());
         let mut buf = vec![];
-        let res = ClientStreamStart::parse(&mut reader, &mut buf).await.unwrap();
+        let res = ClientStreamStart::parse(&mut reader, &mut buf)
-        assert_eq!(res, ClientStreamStart { to: "vlnv.dev".to_owned(), lang: "en".to_owned(), version: "1.0".to_owned()})
+            .await
+            .unwrap();
+        assert_eq!(
+            res,
+            ClientStreamStart {
+                to: "vlnv.dev".to_owned(),
+                lang: "en".to_owned(),
+                version: "1.0".to_owned()
+            }
+        )
+    }
+
+    #[test]
+    fn server_stream_start_write() {
+        let input = ServerStreamStart {
+            from: "vlnv.dev".to_owned(),
+            lang: "en".to_owned(),
+            version: "1.0".to_owned(),
+        };
+        let expected = r###"<stream:stream from="vlnv.dev" version="1.0" xmlns="jabber:client" xmlns:stream="http://etherx.jabber.org/streams" xml:lang="en">"###;
+        let mut output: Vec<u8> = vec![];
+        let mut writer = Writer::new(&mut output);
+        input.write(&mut writer).unwrap();
+        assert_eq!(std::str::from_utf8(&output).unwrap(), expected);
     }
 }

src/util/telemetry.rs

@@ -10,7 +10,6 @@ use hyper::{Method, Request, Response};
 use prometheus::{Encoder, Registry as MetricsRegistry, TextEncoder};
 use serde::Deserialize;
 use tokio::net::TcpListener;
-use tokio::sync::oneshot::channel;
 
 use crate::core::room::RoomRegistry;
 use crate::prelude::*;