Fix logging format: use request path instead of file path, clean timestamp

- Log request paths (/big-file.mkv) instead of file system paths
- Custom timestamp format: YYYY-MM-DDTHH:MM:SSZ (no milliseconds)
- Update serve_file to accept request parameter for proper logging
- Strip gemini://host prefix from logged requests for cleaner logs
- Add time crate for custom timestamp formatting

src/logging.rs

@@ -1,5 +1,17 @@
 use tokio::net::TcpStream;
 use tokio_rustls::server::TlsStream;
+use tracing_subscriber::fmt::time::FormatTime;
+
+struct GeminiTimeFormat;
+
+impl FormatTime for GeminiTimeFormat {
+    fn format_time(&self, w: &mut tracing_subscriber::fmt::format::Writer<'_>) -> std::fmt::Result {
+        let now = time::OffsetDateTime::now_utc();
+        write!(w, "{}-{:02}-{:02}T{:02}:{:02}:{:02}Z",
+               now.year(), now.month() as u8, now.day(),
+               now.hour(), now.minute(), now.second())
+    }
+}
 
 pub struct RequestLogger {
     client_ip: String,
@@ -25,9 +37,11 @@ impl RequestLogger {
             _ => tracing::Level::ERROR,
         };
 
+        let request_path = self.request_url.strip_prefix("gemini://localhost").unwrap_or(&self.request_url);
+
         match level {
-            tracing::Level::WARN => tracing::warn!("{} \"{}\" {} \"{}\"", self.client_ip, self.request_url, status_code, error_message),
-            tracing::Level::ERROR => tracing::error!("{} \"{}\" {} \"{}\"", self.client_ip, self.request_url, status_code, error_message),
+            tracing::Level::WARN => tracing::warn!("{} \"{}\" {} \"{}\"", self.client_ip, request_path, status_code, error_message),
+            tracing::Level::ERROR => tracing::error!("{} \"{}\" {} \"{}\"", self.client_ip, request_path, status_code, error_message),
             _ => {}
         }
     }
@@ -61,6 +75,7 @@ pub fn init_logging(level: &str) {
     tracing_subscriber::registry()
         .with(tracing_subscriber::fmt::layer()
             .compact()
+            .with_timer(GeminiTimeFormat)
             .with_target(false)
             .with_thread_ids(false))
         .with(tracing_subscriber::filter::LevelFilter::from_level(level))