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use crate::middleware::{Middleware, Next};
use crate::{Client, Request, Response};
use std::fmt::Arguments;
use std::sync::atomic::{AtomicUsize, Ordering};
use std::time;
static COUNTER: AtomicUsize = AtomicUsize::new(0);
#[derive(Debug, Default)]
pub struct Logger {
_priv: (),
}
impl Logger {
pub fn new() -> Self {
Logger { _priv: () }
}
}
#[async_trait::async_trait]
impl Middleware for Logger {
#[allow(missing_doc_code_examples)]
async fn handle(
&self,
req: Request,
client: Client,
next: Next<'_>,
) -> Result<Response, http_types::Error> {
let start_time = time::Instant::now();
let uri = format!("{}", req.url());
let method = format!("{}", req.method());
let id = COUNTER.fetch_add(1, Ordering::Relaxed);
print(
log::Level::Info,
format_args!("sending request"),
RequestPairs {
id,
uri: &uri,
method: &method,
},
);
let res = next.run(req, client).await?;
let status = res.status();
let elapsed = start_time.elapsed();
let level = if status.is_server_error() {
log::Level::Error
} else if status.is_client_error() {
log::Level::Warn
} else {
log::Level::Info
};
print(
level,
format_args!("request completed"),
ResponsePairs {
id,
elapsed: &format!("{:?}", elapsed),
status: status.into(),
},
);
Ok(res)
}
}
struct RequestPairs<'a> {
id: usize,
method: &'a str,
uri: &'a str,
}
impl<'a> log::kv::Source for RequestPairs<'a> {
fn visit<'kvs>(
&'kvs self,
visitor: &mut dyn log::kv::Visitor<'kvs>,
) -> Result<(), log::kv::Error> {
visitor.visit_pair("req.id".into(), self.id.into())?;
visitor.visit_pair("req.method".into(), self.method.into())?;
visitor.visit_pair("req.uri".into(), self.uri.into())?;
Ok(())
}
}
struct ResponsePairs<'a> {
id: usize,
status: u16,
elapsed: &'a str,
}
impl<'a> log::kv::Source for ResponsePairs<'a> {
fn visit<'kvs>(
&'kvs self,
visitor: &mut dyn log::kv::Visitor<'kvs>,
) -> Result<(), log::kv::Error> {
visitor.visit_pair("req.id".into(), self.id.into())?;
visitor.visit_pair("req.status".into(), self.status.into())?;
visitor.visit_pair("elapsed".into(), self.elapsed.into())?;
Ok(())
}
}
fn print(level: log::Level, msg: Arguments<'_>, key_values: impl log::kv::Source) {
if level <= log::STATIC_MAX_LEVEL && level <= log::max_level() {
log::logger().log(
&log::Record::builder()
.args(msg)
.key_values(&key_values)
.level(level)
.target(module_path!())
.module_path(Some(module_path!()))
.file(Some(file!()))
.line(Some(line!()))
.build(),
);
}
}