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|
use std::{
fs::{self, File},
io,
path::Path,
};
use chrono::DateTime;
use common::auth::AccessToken;
use directory::{backend::internal::manage, Permission};
use rev_lines::RevLines;
use serde::Serialize;
use serde_json::json;
use tokio::sync::oneshot;
use utils::url_params::UrlParams;
use crate::{
api::{http::ToHttpResponse, HttpRequest, HttpResponse, JsonResponse},
JMAP,
};
#[derive(Serialize)]
struct LogEntry {
timestamp: String,
level: String,
event: String,
event_id: String,
details: String,
}
impl JMAP {
pub async fn handle_view_logs(
&self,
req: &HttpRequest,
access_token: &AccessToken,
) -> trc::Result<HttpResponse> {
// Validate the access token
access_token.assert_has_permission(Permission::LogsView)?;
let path = self
.core
.metrics
.log_path
.clone()
.ok_or_else(|| manage::unsupported("Tracer log path not configured"))?;
let params = UrlParams::new(req.uri().query());
let filter = params.get("filter").unwrap_or_default().to_string();
let page: usize = params.parse("page").unwrap_or(0);
let limit: usize = params.parse("limit").unwrap_or(100);
let offset = page.saturating_sub(1) * limit;
// TODO: Use worker pool
let (tx, rx) = oneshot::channel();
tokio::task::spawn_blocking(move || {
let _ = tx.send(read_log_files(path, &filter, offset, limit));
});
let (total, items) = rx
.await
.map_err(|err| {
trc::EventType::Server(trc::ServerEvent::ThreadError)
.reason(err)
.caused_by(trc::location!())
})?
.map_err(|err| {
trc::ManageEvent::Error
.reason(err)
.details("Failed to read log files")
.caused_by(trc::location!())
})?;
Ok(JsonResponse::new(json!({
"data": {
"items": items,
"total": total,
},
}))
.into_http_response())
}
}
fn read_log_files(
path: impl AsRef<Path>,
filter: &str,
mut offset: usize,
limit: usize,
) -> io::Result<(usize, Vec<LogEntry>)> {
let mut logs = fs::read_dir(path)?.collect::<Result<Vec<_>, _>>()?;
let mut total = 0;
// Sort the entries by file name in reverse order.
logs.sort_by_key(|b| std::cmp::Reverse(b.file_name()));
// Iterate and print the file names.
let mut entries = Vec::with_capacity(limit);
let mut logs = logs.into_iter();
while let Some(log) = logs.next() {
if log.file_type()?.is_file() {
let mut rev_lines = RevLines::new(File::open(log.path())?);
while let Some(line) = rev_lines.next() {
let line = line.map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))?;
if filter.is_empty() || line.contains(filter) {
total += 1;
if offset == 0 {
if let Some(entry) = LogEntry::from_line(&line) {
entries.push(entry);
if entries.len() == limit {
if rev_lines.next().is_some() || logs.next().is_some() {
total += limit;
}
return Ok((total, entries));
}
}
} else {
offset -= 1;
}
}
}
}
}
Ok((total, entries))
}
impl LogEntry {
fn from_line(line: &str) -> Option<Self> {
let (timestamp, rest) = line.split_once(' ')?;
let timestamp = DateTime::parse_from_rfc3339(timestamp).ok()?;
let (level, rest) = rest.trim().split_once(' ')?;
let (event, rest) = rest.trim().split_once(" (")?;
let (event_id, details) = rest.split_once(")")?;
Some(Self {
timestamp: timestamp.to_rfc3339_opts(chrono::SecondsFormat::Secs, true),
level: level.to_string(),
event: event.to_string(),
event_id: event_id.to_string(),
details: details.trim().to_string(),
})
}
}
|
