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use async_trait::async_trait;
use tracing::{error, info, info_span, warn};
use crate::hooks::{ErrorContext, Hooks};
use crate::plugin::Plugin;
/// Tracing-based logger plugin (request, response, retry, error).
#[derive(Debug, Clone)]
pub struct LoggerPlugin {
/// When `false`, hooks are registered but do not log.
pub enabled: bool,
/// When `true`, includes method and URL on each line.
pub verbose: bool,
}
impl LoggerPlugin {
/// Creates a plugin with logging enabled.
pub fn new() -> Self {
Self {
enabled: true,
verbose: false,
}
}
/// Enables or disables log output.
pub fn enabled(mut self, enabled: bool) -> Self {
self.enabled = enabled;
self
}
/// Enables verbose log fields.
pub fn verbose(mut self, verbose: bool) -> Self {
self.verbose = verbose;
self
}
}
impl Default for LoggerPlugin {
fn default() -> Self {
Self::new()
}
}
#[async_trait]
impl Plugin for LoggerPlugin {
/// Plugin id: `"logger"`.
fn id(&self) -> &'static str {
"logger"
}
fn hooks(&self) -> Hooks {
let enabled = self.enabled;
let verbose = self.verbose;
Hooks::new()
.on_request(move |ctx| {
let enabled = enabled;
let verbose = verbose;
async move {
if enabled {
let span = info_span!(
"http.request",
method = %ctx.method,
url = %ctx.url,
retry_attempt = ctx.retry_attempt,
);
let _guard = span.enter();
if verbose {
info!(header_count = ctx.headers.len(), "better-fetch request");
} else {
info!("better-fetch request");
}
}
Ok(ctx)
}
})
.on_response_stream({
let enabled = self.enabled;
let verbose = self.verbose;
move |ctx| {
let enabled = enabled;
let verbose = verbose;
async move {
if enabled {
let span = info_span!(
"http.response",
status = %ctx.status,
url = %ctx.request.url,
streaming = true,
);
let _guard = span.enter();
if verbose {
info!(
header_count = ctx.headers.len(),
"better-fetch stream response"
);
} else {
info!("better-fetch stream response");
}
}
Ok(crate::hooks::StreamingResponseMeta {
status: ctx.status,
headers: ctx.headers,
})
}
}
})
.on_response({
let enabled = self.enabled;
let verbose = self.verbose;
move |ctx| {
let enabled = enabled;
let verbose = verbose;
async move {
if enabled {
let status = ctx.response.status();
let span = info_span!(
"http.response",
status = %status,
url = %ctx.request.url,
streaming = false,
);
let _guard = span.enter();
if verbose {
info!(
header_count = ctx.response.headers().len(),
"better-fetch response"
);
} else {
info!("better-fetch response");
}
}
Ok(ctx.response)
}
}
})
.on_retry({
let enabled = self.enabled;
move |ctx| {
let enabled = enabled;
async move {
if enabled {
warn!(
retry_attempt = ctx.request.retry_attempt,
next_attempt = ctx.request.retry_attempt + 1,
status = %ctx.response.status(),
url = %ctx.request.url,
"better-fetch retry"
);
}
}
}
})
.on_error({
let enabled = self.enabled;
move |ctx: ErrorContext| {
let enabled = enabled;
async move {
if enabled {
let status = ctx.response.as_ref().map(|r| r.status().as_u16());
let body_preview = ctx.response_body_preview(256);
error!(
error = %ctx.error,
url = %ctx.request.url,
?status,
body_preview = body_preview.as_deref(),
retry_attempt = ctx.request.retry_attempt,
"better-fetch error"
);
}
}
}
})
}
}