diff --git a/server/src/lib.rs b/server/src/lib.rs
index 2c973b8..6715979 100644
--- a/server/src/lib.rs
+++ b/server/src/lib.rs
@@ -1,3 +1,3 @@
-pub mod transport;
+pub mod media;
 pub mod session;
-pub mod media;
\ No newline at end of file
+pub mod transport;
diff --git a/server/src/main.rs b/server/src/main.rs
index 1ffa226..a6a1119 100644
--- a/server/src/main.rs
+++ b/server/src/main.rs
@@ -1,4 +1,4 @@
-use warp::{session,transport};
+use warp::{session, transport};
 
 use clap::Parser;
 use env_logger;
@@ -28,7 +28,7 @@ fn main() -> anyhow::Result<()> {
 
     let args = Cli::parse();
 
-    let server_config = transport::Config{
+    let server_config = transport::Config {
         addr: args.addr,
         cert: args.cert,
         key: args.key,
@@ -36,4 +36,4 @@ fn main() -> anyhow::Result<()> {
 
     let mut server = transport::Server::<session::Session>::new(server_config).unwrap();
     server.run()
-}
\ No newline at end of file
+}
diff --git a/server/src/media/mod.rs b/server/src/media/mod.rs
index 80a709f..e7ec5eb 100644
--- a/server/src/media/mod.rs
+++ b/server/src/media/mod.rs
@@ -1,3 +1,3 @@
 mod source;
 
-pub use source::{Fragment,Source};
\ No newline at end of file
+pub use source::{Fragment, Source};
diff --git a/server/src/media/source.rs b/server/src/media/source.rs
index 0a7d019..6ce9dcb 100644
--- a/server/src/media/source.rs
+++ b/server/src/media/source.rs
@@ -1,13 +1,13 @@
-use std::{io,fs,time};
 use io::Read;
-use std::collections::{VecDeque};
+use std::collections::VecDeque;
+use std::{fs, io, time};
 
 use std::io::Write;
 
-use mp4;
 use anyhow;
+use mp4;
 
-use mp4::{ReadBox,WriteBox};
+use mp4::{ReadBox, WriteBox};
 
 pub struct Source {
     // We read the file once, in order, and don't seek backwards.
@@ -40,7 +40,7 @@ pub struct Fragment {
     pub keyframe: bool,
 
     // The timestamp of the fragment, in milliseconds, to simulate a live stream.
-    pub timestamp: Option<u64>
+    pub timestamp: Option<u64>,
 }
 
 impl Source {
@@ -49,7 +49,7 @@ impl Source {
         let reader = io::BufReader::new(f);
         let start = time::Instant::now();
 
-        Ok(Self{
+        Ok(Self {
             reader,
             start,
             fragments: VecDeque::new(),
@@ -64,7 +64,7 @@ impl Source {
         };
 
         if self.timeout().is_some() {
-            return Ok(None)
+            return Ok(None);
         }
 
         Ok(self.fragments.pop_front())
@@ -84,7 +84,7 @@ impl Source {
                     // Don't return anything until we know the total number of tracks.
                     // To be honest, I didn't expect the borrow checker to allow this, but it does!
                     self.ftyp = atom;
-                },
+                }
                 mp4::BoxType::MoovBox => {
                     // We need to split the moov based on the tracks.
                     let moov = mp4::MoovBox::read_box(&mut reader, header.size)?;
@@ -105,7 +105,11 @@ impl Source {
                         // We remove every box for other track IDs.
                         let mut toov = moov.clone();
                         toov.traks.retain(|t| t.tkhd.track_id == track_id);
-                        toov.mvex.as_mut().expect("missing mvex").trexs.retain(|f| f.track_id == track_id);
+                        toov.mvex
+                            .as_mut()
+                            .expect("missing mvex")
+                            .trexs
+                            .retain(|f| f.track_id == track_id);
 
                         // Marshal the box.
                         let mut toov_data = Vec::new();
@@ -124,7 +128,7 @@ impl Source {
                     }
 
                     self.moov = Some(moov);
-                },
+                }
                 mp4::BoxType::MoofBox => {
                     let moof = mp4::MoofBox::read_box(&mut reader, header.size)?;
 
@@ -133,19 +137,19 @@ impl Source {
                         anyhow::bail!("multiple tracks per moof atom")
                     }
 
-                    self.fragments.push_back(Fragment{
+                    self.fragments.push_back(Fragment {
                         track: moof.trafs[0].tfhd.track_id,
                         typ: mp4::BoxType::MoofBox,
                         data: atom,
                         keyframe: has_keyframe(&moof),
                         timestamp: first_timestamp(&moof),
                     })
-                },
+                }
                 mp4::BoxType::MdatBox => {
                     let moof = self.fragments.back().expect("no atom before mdat");
                     assert!(moof.typ == mp4::BoxType::MoofBox, "no moof before mdat");
 
-                    self.fragments.push_back(Fragment{
+                    self.fragments.push_back(Fragment {
                         track: moof.track,
                         typ: mp4::BoxType::MoofBox,
                         data: atom,
@@ -154,8 +158,8 @@ impl Source {
                     });
 
                     // We have some media data, return so we can start sending it.
-                    return Ok(())
-                },
+                    return Ok(());
+                }
                 _ => anyhow::bail!("unknown top-level atom: {:?}", header.name),
             }
         }
@@ -167,7 +171,12 @@ impl Source {
         let timestamp = next.timestamp?;
 
         // Find the timescale for the track.
-        let track = self.moov.as_ref()?.traks.iter().find(|t| t.tkhd.track_id == next.track)?;
+        let track = self
+            .moov
+            .as_ref()?
+            .traks
+            .iter()
+            .find(|t| t.tkhd.track_id == next.track)?;
         let timescale = track.mdia.mdhd.timescale as u64;
 
         let delay = time::Duration::from_millis(1000 * timestamp / timescale);
@@ -195,17 +204,21 @@ fn read_box<R: io::Read>(reader: &mut R) -> anyhow::Result<Vec<u8>> {
         1 => {
             reader.read_exact(&mut buf)?;
             let size_large = u64::from_be_bytes(buf);
-            anyhow::ensure!(size_large >= 16, "impossible extended box size: {}", size_large);
+            anyhow::ensure!(
+                size_large >= 16,
+                "impossible extended box size: {}",
+                size_large
+            );
 
             reader.take(size_large - 16)
-        },
+        }
 
         2..=7 => {
             anyhow::bail!("impossible box size: {}", size)
         }
 
         // Otherwise read based on the size.
-        size => reader.take(size - 8)
+        size => reader.take(size - 8),
     };
 
     // Append to the vector and return it.
@@ -238,7 +251,7 @@ fn has_keyframe(moof: &mp4::MoofBox) -> bool {
             let non_sync = (flags >> 16) & 0x1 == 0x1; // kSampleIsNonSyncSample
 
             if keyframe && !non_sync {
-                return true
+                return true;
             }
         }
     }
diff --git a/server/src/session/message.rs b/server/src/session/message.rs
index 8718b81..74243e8 100644
--- a/server/src/session/message.rs
+++ b/server/src/session/message.rs
@@ -36,4 +36,4 @@ impl Message {
 
         Ok(out)
     }
-}
\ No newline at end of file
+}
diff --git a/server/src/session/mod.rs b/server/src/session/mod.rs
index 031805c..592f525 100644
--- a/server/src/session/mod.rs
+++ b/server/src/session/mod.rs
@@ -1,4 +1,4 @@
-mod session;
 mod message;
+mod session;
 
-pub use session::Session;
\ No newline at end of file
+pub use session::Session;
diff --git a/server/src/session/session.rs b/server/src/session/session.rs
index d01dd00..8b48521 100644
--- a/server/src/session/session.rs
+++ b/server/src/session/session.rs
@@ -3,8 +3,8 @@ use std::time;
 use quiche;
 use quiche::h3::webtransport;
 
-use crate::{media,transport};
 use super::message;
+use crate::{media, transport};
 
 #[derive(Default)]
 pub struct Session {
@@ -16,7 +16,11 @@ pub struct Session {
 
 impl transport::App for Session {
     // Process any updates to a session.
-    fn poll(&mut self, conn: &mut quiche::Connection, session: &mut webtransport::ServerSession) -> anyhow::Result<()> {
+    fn poll(
+        &mut self,
+        conn: &mut quiche::Connection,
+        session: &mut webtransport::ServerSession,
+    ) -> anyhow::Result<()> {
         loop {
             let event = match session.poll(conn) {
                 Err(webtransport::Error::Done) => break,
@@ -39,18 +43,16 @@ impl transport::App for Session {
                     self.media = Some(media);
 
                     session.accept_connect_request(conn, None).unwrap();
-                },
+                }
                 webtransport::ServerEvent::StreamData(stream_id) => {
                     let mut buf = vec![0; 10000];
-                    while let Ok(len) =
-                        session.recv_stream_data(conn, stream_id, &mut buf)
-                    {
+                    while let Ok(len) = session.recv_stream_data(conn, stream_id, &mut buf) {
                         let stream_data = &buf[0..len];
                         log::debug!("stream data {:?}", stream_data);
                     }
                 }
 
-                _ => {},
+                _ => {}
             }
         }
 
@@ -69,7 +71,11 @@ impl transport::App for Session {
 }
 
 impl Session {
-    fn poll_source(&mut self, conn: &mut quiche::Connection, session: &mut webtransport::ServerSession) -> anyhow::Result<()> {
+    fn poll_source(
+        &mut self,
+        conn: &mut quiche::Connection,
+        session: &mut webtransport::ServerSession,
+    ) -> anyhow::Result<()> {
         // Get the media source once the connection is established.
         let media = match &mut self.media {
             Some(m) => m,
@@ -92,7 +98,7 @@ impl Session {
 
                 // Encode a JSON header indicating this is the video track.
                 let mut message = message::Message::new();
-                message.segment = Some(message::Segment{
+                message.segment = Some(message::Segment {
                     init: "video".to_string(),
                 });
 
@@ -105,13 +111,13 @@ impl Session {
                 self.streams.send(conn, stream_id, &data, false)?;
 
                 stream_id
-            },
+            }
             None => {
                 // This is the start of an init segment.
 
                 // Create a JSON header.
                 let mut message = message::Message::new();
-                message.init = Some(message::Init{
+                message.init = Some(message::Init {
                     id: "video".to_string(),
                 });
 
@@ -135,4 +141,4 @@ impl Session {
 
         Ok(())
     }
-}
\ No newline at end of file
+}
diff --git a/server/src/transport/app.rs b/server/src/transport/app.rs
index b55ce53..9024448 100644
--- a/server/src/transport/app.rs
+++ b/server/src/transport/app.rs
@@ -3,6 +3,10 @@ use std::time;
 use quiche::h3::webtransport;
 
 pub trait App: Default {
-    fn poll(&mut self, conn: &mut quiche::Connection, session: &mut webtransport::ServerSession) -> anyhow::Result<()>;
+    fn poll(
+        &mut self,
+        conn: &mut quiche::Connection,
+        session: &mut webtransport::ServerSession,
+    ) -> anyhow::Result<()>;
     fn timeout(&self) -> Option<time::Duration>;
 }
diff --git a/server/src/transport/connection.rs b/server/src/transport/connection.rs
index 2fb12d9..e9766dc 100644
--- a/server/src/transport/connection.rs
+++ b/server/src/transport/connection.rs
@@ -12,4 +12,4 @@ pub struct Connection<T: app::App> {
     pub quiche: quiche::Connection,
     pub session: Option<webtransport::ServerSession>,
     pub app: T,
-}
\ No newline at end of file
+}
diff --git a/server/src/transport/mod.rs b/server/src/transport/mod.rs
index f8d86e8..60ef79d 100644
--- a/server/src/transport/mod.rs
+++ b/server/src/transport/mod.rs
@@ -1,8 +1,8 @@
-mod server;
-mod connection;
 mod app;
+mod connection;
+mod server;
 mod streams;
 
 pub use app::App;
 pub use server::{Config, Server};
-pub use streams::Streams;
\ No newline at end of file
+pub use streams::Streams;
diff --git a/server/src/transport/server.rs b/server/src/transport/server.rs
index 6c3eebc..cc9cbe1 100644
--- a/server/src/transport/server.rs
+++ b/server/src/transport/server.rs
@@ -2,8 +2,8 @@ use std::io;
 
 use quiche::h3::webtransport;
 
-use super::connection;
 use super::app;
+use super::connection;
 
 const MAX_DATAGRAM_SIZE: usize = 1350;
 
@@ -36,11 +36,9 @@ impl<T: app::App> Server<T> {
         let poll = mio::Poll::new().unwrap();
         let events = mio::Events::with_capacity(1024);
 
-        poll.registry().register(
-            &mut socket,
-            mio::Token(0),
-            mio::Interest::READABLE,
-        ).unwrap();
+        poll.registry()
+            .register(&mut socket, mio::Token(0), mio::Interest::READABLE)
+            .unwrap();
 
         // Generate random values for connection IDs.
         let rng = ring::rand::SystemRandom::new();
@@ -50,7 +48,8 @@ impl<T: app::App> Server<T> {
         let mut quic = quiche::Config::new(quiche::PROTOCOL_VERSION).unwrap();
         quic.load_cert_chain_from_pem_file(&config.cert).unwrap();
         quic.load_priv_key_from_pem_file(&config.key).unwrap();
-        quic.set_application_protos(quiche::h3::APPLICATION_PROTOCOL).unwrap();
+        quic.set_application_protos(quiche::h3::APPLICATION_PROTOCOL)
+            .unwrap();
         quic.set_max_idle_timeout(5000);
         quic.set_max_recv_udp_payload_size(MAX_DATAGRAM_SIZE);
         quic.set_max_send_udp_payload_size(MAX_DATAGRAM_SIZE);
@@ -92,17 +91,21 @@ impl<T: app::App> Server<T> {
         // Find the shorter timeout from all the active connections.
         //
         // TODO: use event loop that properly supports timers
-        let timeout = self.conns.values().filter_map(|c| {
-            let timeout = c.quiche.timeout();
-            let expires = c.app.timeout();
+        let timeout = self
+            .conns
+            .values()
+            .filter_map(|c| {
+                let timeout = c.quiche.timeout();
+                let expires = c.app.timeout();
 
-            match (timeout, expires) {
-                (Some(a), Some(b)) => Some(a.min(b)),
-                (Some(a), None) => Some(a),
-                (None, Some(b)) => Some(b),
-                (None, None) => None,
-            }
-        }).min();
+                match (timeout, expires) {
+                    (Some(a), Some(b)) => Some(a.min(b)),
+                    (Some(a), None) => Some(a),
+                    (None, Some(b)) => Some(b),
+                    (None, None) => None,
+                }
+            })
+            .min();
 
         self.poll.poll(&mut self.events, timeout).unwrap();
 
@@ -120,7 +123,7 @@ impl<T: app::App> Server<T> {
 
     // Reads packets from the socket, updating any internal connection state.
     fn receive(&mut self) -> anyhow::Result<()> {
-        let mut src= [0; MAX_DATAGRAM_SIZE];
+        let mut src = [0; MAX_DATAGRAM_SIZE];
 
         // Try reading any data currently available on the socket.
         loop {
@@ -150,20 +153,24 @@ impl<T: app::App> Server<T> {
                 conn.quiche.recv(src, info)?;
 
                 if conn.session.is_none() && conn.quiche.is_established() {
-                    conn.session = Some(webtransport::ServerSession::with_transport(&mut conn.quiche)?)
+                    conn.session = Some(webtransport::ServerSession::with_transport(
+                        &mut conn.quiche,
+                    )?)
                 }
 
-                continue
+                continue;
             } else if let Some(conn) = self.conns.get_mut(&conn_id) {
                 // 1-RTT traffic.
                 conn.quiche.recv(src, info)?;
 
                 // TODO is this needed here?
                 if conn.session.is_none() && conn.quiche.is_established() {
-                    conn.session = Some(webtransport::ServerSession::with_transport(&mut conn.quiche)?)
+                    conn.session = Some(webtransport::ServerSession::with_transport(
+                        &mut conn.quiche,
+                    )?)
                 }
 
-                continue
+                continue;
             }
 
             if hdr.ty != quiche::Type::Initial {
@@ -174,10 +181,10 @@ impl<T: app::App> Server<T> {
 
             if !quiche::version_is_supported(hdr.version) {
                 let len = quiche::negotiate_version(&hdr.scid, &hdr.dcid, &mut dst).unwrap();
-                let dst= &dst[..len];
+                let dst = &dst[..len];
 
                 self.socket.send_to(dst, from).unwrap();
-                continue
+                continue;
             }
 
             let mut scid = [0; quiche::MAX_CONN_ID_LEN];
@@ -202,10 +209,10 @@ impl<T: app::App> Server<T> {
                 )
                 .unwrap();
 
-                let dst= &dst[..len];
+                let dst = &dst[..len];
 
                 self.socket.send_to(dst, from).unwrap();
-                continue
+                continue;
             }
 
             let odcid = validate_token(&from, token);
@@ -222,21 +229,23 @@ impl<T: app::App> Server<T> {
 
             // Reuse the source connection ID we sent in the Retry packet,
             // instead of changing it again.
-            let conn_id= hdr.dcid.clone();
+            let conn_id = hdr.dcid.clone();
             let local_addr = self.socket.local_addr().unwrap();
 
-            let mut conn = quiche::accept(&conn_id, odcid.as_ref(), local_addr, from, &mut self.quic)?;
+            let mut conn =
+                quiche::accept(&conn_id, odcid.as_ref(), local_addr, from, &mut self.quic)?;
 
             // Process potentially coalesced packets.
             conn.recv(src, info)?;
 
-            let user = connection::Connection{
+            let user = connection::Connection {
                 quiche: conn,
                 session: None,
                 app: T::default(),
             };
 
-            self.conns.insert(user.quiche.source_id().into_owned(), user);
+            self.conns
+                .insert(user.quiche.source_id().into_owned(), user);
         }
     }
 
@@ -262,7 +271,7 @@ impl<T: app::App> Server<T> {
 
         for conn in self.conns.values_mut() {
             loop {
-                let (size , info) = match conn.quiche.send(&mut pkt) {
+                let (size, info) = match conn.quiche.send(&mut pkt) {
                     Ok(v) => v,
                     Err(quiche::Error::Done) => return Ok(()),
                     Err(e) => return Err(e.into()),
@@ -283,7 +292,7 @@ impl<T: app::App> Server<T> {
 
     pub fn cleanup(&mut self) {
         // Garbage collect closed connections.
-        self.conns.retain(|_, ref mut c| !c.quiche.is_closed() );
+        self.conns.retain(|_, ref mut c| !c.quiche.is_closed());
     }
 }
 
@@ -319,7 +328,8 @@ fn mint_token(hdr: &quiche::Header, src: &std::net::SocketAddr) -> Vec<u8> {
 /// Note that this function is only an example and doesn't do any cryptographic
 /// authenticate of the token. *It should not be used in production system*.
 fn validate_token<'a>(
-    src: &std::net::SocketAddr, token: &'a [u8],
+    src: &std::net::SocketAddr,
+    token: &'a [u8],
 ) -> Option<quiche::ConnectionId<'a>> {
     if token.len() < 6 {
         return None;
@@ -341,4 +351,4 @@ fn validate_token<'a>(
     }
 
     Some(quiche::ConnectionId::from_ref(&token[addr.len()..]))
-}
\ No newline at end of file
+}
diff --git a/server/src/transport/streams.rs b/server/src/transport/streams.rs
index 6b78233..a69717c 100644
--- a/server/src/transport/streams.rs
+++ b/server/src/transport/streams.rs
@@ -1,8 +1,8 @@
 use std::collections::hash_map as hmap;
 use std::collections::VecDeque;
 
-use quiche;
 use anyhow;
+use quiche;
 
 #[derive(Default)]
 pub struct Streams {
@@ -16,14 +16,20 @@ struct State {
 }
 
 impl Streams {
-    pub fn send(&mut self, conn: &mut quiche::Connection, id: u64, buf: &[u8], fin: bool) -> anyhow::Result<()> {
+    pub fn send(
+        &mut self,
+        conn: &mut quiche::Connection,
+        id: u64,
+        buf: &[u8],
+        fin: bool,
+    ) -> anyhow::Result<()> {
         match self.lookup.entry(id) {
             hmap::Entry::Occupied(mut entry) => {
                 // Add to the existing buffer.
                 let state = entry.get_mut();
                 state.buffer.extend(buf);
                 state.fin |= fin;
-            },
+            }
             hmap::Entry::Vacant(entry) => {
                 let size = conn.stream_send(id, buf, fin)?;
 
@@ -32,9 +38,9 @@ impl Streams {
                     let mut buffer = VecDeque::with_capacity(buf.len());
                     buffer.extend(&buf[size..]);
 
-                    entry.insert(State{buffer, fin});
+                    entry.insert(State { buffer, fin });
                 }
-            },
+            }
         };
 
         Ok(())
@@ -58,7 +64,7 @@ impl Streams {
                 let size = conn.stream_send(id, parts.0, false)?;
                 if size == 0 {
                     // No more space available for this stream.
-                    continue 'outer
+                    continue 'outer;
                 }
 
                 // Remove the bytes that were written.
@@ -76,4 +82,4 @@ impl Streams {
 
         Ok(())
     }
-}
\ No newline at end of file
+}