gzip compress audit file

Signed-off-by: eternal-flame-AD <yume@yumechi.jp>

src/evaluate/chain/audit.rs

@@ -1,7 +1,10 @@
 use axum::response::IntoResponse;
+use flate2::write::GzEncoder;
+use flate2::{Compression, GzBuilder};
 use serde::Serialize;
 use std::collections::HashSet;
 use std::fs::{File, OpenOptions};
+use std::io::{BufReader, BufWriter};
 use std::sync::atomic::AtomicU32;
 use std::{collections::HashMap, fmt::Debug, ops::DerefMut, path::PathBuf, sync::Arc};
 use tokio::sync::{Mutex, RwLock};
@@ -57,7 +60,7 @@ pub enum AuditError {
 
 pub struct AuditState {
     options: AuditOptions,
-    cur_file: Option<RwLock<HashMap<String, Mutex<File>>>>,
+    cur_file: Option<RwLock<HashMap<String, Mutex<GzEncoder<File>>>>>,
     vacuum_counter: AtomicU32,
 }
 
@@ -81,7 +84,7 @@ impl AuditState {
             .filter_map(|f| f.ok())
             .filter(|f| {
                 f.file_type().map(|t| t.is_file()).unwrap_or(false)
-                    && f.file_name().to_string_lossy().ends_with(".json")
+                    && f.file_name().to_string_lossy().ends_with(".json.gz")
             })
             .filter(|f| !in_use_files.contains(&f.file_name().to_string_lossy().to_string()));
 
@@ -108,7 +111,7 @@ impl AuditState {
 
         let mut write = self.cur_file.as_ref().unwrap().write().await;
 
-        let full_name = format!("{}_{}.json", name, time_str);
+        let full_name = format!("{}_{}.json.gz", name, time_str);
 
         let file = OpenOptions::new()
             .create(true)
@@ -116,7 +119,9 @@ impl AuditState {
             .append(true)
             .open(&self.options.output.join(&full_name))?;
 
-        write.insert(name.to_string(), Mutex::new(file));
+        let gz = GzEncoder::new(file, Compression::default());
+
+        write.insert(name.to_string(), Mutex::new(gz));
 
         Ok(())
     }
@@ -143,7 +148,7 @@ impl AuditState {
 
             serde_json::to_writer(f.deref_mut(), &item)?;
 
-            let meta = f.metadata()?;
+            let meta = f.get_ref().metadata()?;
 
             if let Some(size) = self.options.rotate_size {
                 if meta.len() >= size {
@@ -161,6 +166,10 @@ impl AuditState {
 
         let file = File::create(&self.options.output.join(name))?;
 
+        let file = GzBuilder::new()
+            .filename(name)
+            .write(file, Compression::default());
+
         write.insert(name.to_string(), Mutex::new(file));
 
         // this is deliberately out of order to make sure we don't create endless files if serialization fails