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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use std::{
cell::RefCell,
fmt,
path::{Path, PathBuf},
rc::Rc,
};
use qlog::{
self, streamer::QlogStreamer, CommonFields, Configuration, TraceSeq, VantagePoint,
VantagePointType,
};
use crate::Role;
#[allow(clippy::module_name_repetitions)]
#[derive(Debug, Clone, Default)]
pub struct NeqoQlog {
inner: Rc<RefCell<Option<NeqoQlogShared>>>,
}
pub struct NeqoQlogShared {
qlog_path: PathBuf,
streamer: QlogStreamer,
}
impl NeqoQlog {
/// Create an enabled `NeqoQlog` configuration.
///
/// # Errors
///
/// Will return `qlog::Error` if cannot write to the new log.
pub fn enabled(
mut streamer: QlogStreamer,
qlog_path: impl AsRef<Path>,
) -> Result<Self, qlog::Error> {
streamer.start_log()?;
Ok(Self {
inner: Rc::new(RefCell::new(Some(NeqoQlogShared {
streamer,
qlog_path: qlog_path.as_ref().to_owned(),
}))),
})
}
#[must_use]
pub fn inner(&self) -> Rc<RefCell<Option<NeqoQlogShared>>> {
Rc::clone(&self.inner)
}
/// Create a disabled `NeqoQlog` configuration.
#[must_use]
pub fn disabled() -> Self {
Self::default()
}
/// If logging enabled, closure may generate an event to be logged.
pub fn add_event<F>(&mut self, f: F)
where
F: FnOnce() -> Option<qlog::events::Event>,
{
self.add_event_with_stream(|s| {
if let Some(evt) = f() {
s.add_event(evt)?;
}
Ok(())
});
}
/// If logging enabled, closure may generate an event to be logged.
pub fn add_event_data<F>(&mut self, f: F)
where
F: FnOnce() -> Option<qlog::events::EventData>,
{
self.add_event_with_stream(|s| {
if let Some(ev_data) = f() {
s.add_event_data_now(ev_data)?;
}
Ok(())
});
}
/// If logging enabled, closure is given the Qlog stream to write events and
/// frames to.
pub fn add_event_with_stream<F>(&mut self, f: F)
where
F: FnOnce(&mut QlogStreamer) -> Result<(), qlog::Error>,
{
if let Some(inner) = self.inner.borrow_mut().as_mut() {
if let Err(e) = f(&mut inner.streamer) {
crate::do_log!(
::log::Level::Error,
"Qlog event generation failed with error {}; closing qlog.",
e
);
*self.inner.borrow_mut() = None;
}
}
}
}
impl fmt::Debug for NeqoQlogShared {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "NeqoQlog writing to {}", self.qlog_path.display())
}
}
impl Drop for NeqoQlogShared {
fn drop(&mut self) {
if let Err(e) = self.streamer.finish_log() {
crate::do_log!(::log::Level::Error, "Error dropping NeqoQlog: {}", e);
}
}
}
#[must_use]
pub fn new_trace(role: Role) -> qlog::TraceSeq {
TraceSeq {
vantage_point: VantagePoint {
name: Some(format!("neqo-{role}")),
ty: match role {
Role::Client => VantagePointType::Client,
Role::Server => VantagePointType::Server,
},
flow: None,
},
title: Some(format!("neqo-{role} trace")),
description: Some("Example qlog trace description".to_string()),
configuration: Some(Configuration {
time_offset: Some(0.0),
original_uris: None,
}),
common_fields: Some(CommonFields {
group_id: None,
protocol_type: None,
reference_time: {
// It is better to allow this than deal with a conversion from i64 to f64.
// We can't do the obvious two-step conversion with f64::from(i32::try_from(...)),
// because that overflows earlier than is ideal. This should be fine for a while.
#[allow(clippy::cast_precision_loss)]
Some(time::OffsetDateTime::now_utc().unix_timestamp() as f64)
},
time_format: Some("relative".to_string()),
}),
}
}
#[cfg(test)]
mod test {
use qlog::events::Event;
use test_fixture::EXPECTED_LOG_HEADER;
const EV_DATA: qlog::events::EventData =
qlog::events::EventData::SpinBitUpdated(qlog::events::connectivity::SpinBitUpdated {
state: true,
});
const EXPECTED_LOG_EVENT: &str = concat!(
"\u{1e}",
r#"{"time":0.0,"name":"connectivity:spin_bit_updated","data":{"state":true}}"#,
"\n"
);
#[test]
fn new_neqo_qlog() {
let (_log, contents) = test_fixture::new_neqo_qlog();
assert_eq!(contents.to_string(), EXPECTED_LOG_HEADER);
}
#[test]
fn add_event() {
let (mut log, contents) = test_fixture::new_neqo_qlog();
log.add_event(|| Some(Event::with_time(1.1, EV_DATA)));
assert_eq!(
contents.to_string(),
format!(
"{EXPECTED_LOG_HEADER}{e}",
e = EXPECTED_LOG_EVENT.replace("\"time\":0.0,", "\"time\":1.1,")
)
);
}
}
|
