trillium_client/conn/
shared.rs

1use super::{Body, Conn, ReceivedBody, ReceivedBodyState, Transport, TypeSet, encoding};
2use crate::{Error, Result, Version, pool::PoolEntry};
3use futures_lite::{AsyncWriteExt, io};
4use std::{
5    fmt::{self, Debug, Formatter},
6    future::{Future, IntoFuture},
7    mem,
8    pin::Pin,
9};
10use trillium_http::Upgrade;
11
12/// A wrapper error for [`trillium_http::Error`] or, depending on json serializer feature, either
13/// `sonic_rs::Error` or `serde_json::Error`. Only available when either the `sonic-rs` or
14/// `serde_json` cargo features are enabled.
15#[cfg(any(feature = "serde_json", feature = "sonic-rs"))]
16#[derive(thiserror::Error, Debug)]
17pub enum ClientSerdeError {
18    /// A [`trillium_http::Error`]
19    #[error(transparent)]
20    HttpError(#[from] Error),
21
22    #[cfg(feature = "sonic-rs")]
23    /// A [`sonic_rs::Error`]
24    #[error(transparent)]
25    JsonError(#[from] sonic_rs::Error),
26
27    #[cfg(feature = "serde_json")]
28    /// A [`serde_json::Error`]
29    #[error(transparent)]
30    JsonError(#[from] serde_json::Error),
31}
32
33impl Conn {
34    pub(crate) async fn exec(&mut self) -> Result<()> {
35        if let Some(h3) = self.h3.clone()
36            && self.try_exec_h3(&h3).await?
37        {
38            self.update_alt_svc_from_response(&h3);
39            return Ok(());
40        }
41
42        self.exec_h1().await
43    }
44
45    pub(crate) fn body_len(&self) -> Option<u64> {
46        if let Some(ref body) = self.request_body {
47            body.len()
48        } else {
49            Some(0)
50        }
51    }
52
53    pub(crate) fn finalize_headers(&mut self) -> Result<()> {
54        match self.http_version {
55            Version::Http0_9 | Version::Http1_0 | Version::Http1_1 => self.finalize_headers_h1(),
56            Version::Http3 if self.h3.is_some() => self.finalize_headers_h3(),
57            other => Err(Error::UnsupportedVersion(other)),
58        }
59    }
60}
61
62impl Drop for Conn {
63    fn drop(&mut self) {
64        log::trace!("dropping client conn");
65        let Some(mut transport) = self.transport.take() else {
66            log::trace!("no transport, nothing to do");
67
68            return;
69        };
70
71        if !self.is_keep_alive() {
72            log::trace!("not keep alive, closing");
73
74            self.config
75                .runtime()
76                .clone()
77                .spawn(async move { transport.close().await });
78
79            return;
80        }
81
82        let Ok(Some(peer_addr)) = transport.peer_addr() else {
83            return;
84        };
85        let Some(pool) = self.pool.take() else { return };
86
87        let origin = self.url.origin();
88
89        if self.response_body_state == ReceivedBodyState::End {
90            log::trace!(
91                "response body has been read to completion, checking transport back into pool for \
92                 {}",
93                &peer_addr
94            );
95            pool.insert(origin, PoolEntry::new(transport, None));
96        } else {
97            let content_length = self.response_content_length();
98            let buffer = mem::take(&mut self.buffer);
99            let response_body_state = self.response_body_state;
100            let encoding = encoding(&self.response_headers);
101            self.config.runtime().spawn(async move {
102                let mut response_body = ReceivedBody::new(
103                    content_length,
104                    buffer,
105                    transport,
106                    response_body_state,
107                    None,
108                    encoding,
109                );
110
111                match io::copy(&mut response_body, io::sink()).await {
112                    Ok(bytes) => {
113                        let transport = response_body.take_transport().unwrap();
114                        log::trace!(
115                            "read {} bytes in order to recycle conn for {}",
116                            bytes,
117                            &peer_addr
118                        );
119                        pool.insert(origin, PoolEntry::new(transport, None));
120                    }
121
122                    Err(ioerror) => log::error!("unable to recycle conn due to {}", ioerror),
123                };
124            });
125        }
126    }
127}
128
129impl From<Conn> for Body {
130    fn from(conn: Conn) -> Body {
131        let received_body: ReceivedBody<'static, _> = conn.into();
132        received_body.into()
133    }
134}
135
136impl From<Conn> for ReceivedBody<'static, Box<dyn Transport>> {
137    fn from(mut conn: Conn) -> Self {
138        let _ = conn.finalize_headers();
139        let runtime = conn.config.runtime();
140        let origin = conn.url.origin();
141
142        let on_completion = if conn.is_keep_alive()
143            && let Some(pool) = conn.pool.take()
144        {
145            Box::new(move |transport: Box<dyn Transport>| {
146                log::trace!("body transferred, returning to pool");
147                pool.insert(origin.clone(), PoolEntry::new(transport, None));
148            }) as Box<dyn FnOnce(Box<dyn Transport>) + Send + Sync + 'static>
149        } else {
150            Box::new(move |mut transport: Box<dyn Transport>| {
151                runtime.spawn(async move { transport.close().await });
152            }) as Box<dyn FnOnce(Box<dyn Transport>) + Send + Sync + 'static>
153        };
154
155        ReceivedBody::new(
156            conn.response_content_length(),
157            mem::take(&mut conn.buffer),
158            conn.transport.take().unwrap(),
159            conn.response_body_state,
160            Some(on_completion),
161            conn.response_encoding(),
162        )
163    }
164}
165
166impl From<Conn> for Upgrade<Box<dyn Transport>> {
167    fn from(mut conn: Conn) -> Self {
168        Upgrade::new(
169            mem::take(&mut conn.request_headers),
170            conn.url.path().to_string(),
171            conn.method,
172            conn.transport.take().unwrap(),
173            mem::take(&mut conn.buffer),
174            conn.http_version(),
175        )
176    }
177}
178
179impl IntoFuture for Conn {
180    type IntoFuture = Pin<Box<dyn Future<Output = Self::Output> + Send + 'static>>;
181    type Output = Result<Conn>;
182
183    fn into_future(mut self) -> Self::IntoFuture {
184        Box::pin(async move { (&mut self).await.map(|()| self) })
185    }
186}
187
188impl<'conn> IntoFuture for &'conn mut Conn {
189    type IntoFuture = Pin<Box<dyn Future<Output = Self::Output> + Send + 'conn>>;
190    type Output = Result<()>;
191
192    fn into_future(self) -> Self::IntoFuture {
193        Box::pin(async move {
194            if let Some(duration) = self.timeout {
195                self.config
196                    .runtime()
197                    .timeout(duration, self.exec())
198                    .await
199                    .unwrap_or(Err(Error::TimedOut("Conn", duration)))?;
200            } else {
201                self.exec().await?;
202            }
203            Ok(())
204        })
205    }
206}
207
208impl Debug for Conn {
209    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
210        f.debug_struct("Conn")
211            .field("url", &self.url)
212            .field("method", &self.method)
213            .field("request_headers", &self.request_headers)
214            .field("response_headers", &self.response_headers)
215            .field("status", &self.status)
216            .field("request_body", &self.request_body)
217            .field("pool", &self.pool)
218            .field("h3", &self.h3.is_some())
219            .field("buffer", &String::from_utf8_lossy(&self.buffer))
220            .field("response_body_state", &self.response_body_state)
221            .field("config", &self.config)
222            .field("state", &self.state)
223            .field("authority", &self.authority)
224            .field("scheme", &self.scheme)
225            .field("path", &self.path)
226            .field("request_target", &self.request_target)
227            .field("request_trailers", &self.request_trailers)
228            .field("response_trailers", &self.response_trailers)
229            .finish()
230    }
231}
232
233impl AsRef<TypeSet> for Conn {
234    fn as_ref(&self) -> &TypeSet {
235        &self.state
236    }
237}
238
239impl AsMut<TypeSet> for Conn {
240    fn as_mut(&mut self) -> &mut TypeSet {
241        &mut self.state
242    }
243}
trillium_client/conn/shared.rs

trillium_client/conn/
shared.rs
