From 1c94f157fe250e880a40db7f2711a00dc0975368 Mon Sep 17 00:00:00 2001
From: Ding <michael19950415@outlook.com>
Date: Mon, 17 Nov 2025 09:49:11 +0800
Subject: [PATCH 1/2] impl drop

---
 lib/src/epub/reader.rs | 14 +++++---------
 lib/src/mobi/reader.rs | 18 +++++++++++++++++-
 2 files changed, 22 insertions(+), 10 deletions(-)

diff --git a/lib/src/epub/reader.rs b/lib/src/epub/reader.rs
index 6d02bf1..09e9ef6 100644
--- a/lib/src/epub/reader.rs
+++ b/lib/src/epub/reader.rs
@@ -708,25 +708,21 @@ fn has_epub_type(e: &BytesStart, value: &str) -> bool {
 }
 
 #[derive(Debug, Clone)]
-struct EpubReader<T> {
+struct EpubReader<T: Read + Seek> {
     inner: zip::ZipArchive<T>,
 }
 
-// impl <T: Read + Seek> From<Vec<u8>> for EpubReader<T> {
-//     fn from(value: Vec<u8>) -> Self {
-
-//         EpubReader{
-//             inner:
-//         }
+impl<T: Read + Seek> Drop for EpubReader<T> {
+    fn drop(&mut self) {}
+}
 
-//     }
-// }
 impl<T: Read + Seek> EpubReader<T> {
     pub fn new(value: T) -> IResult<Self> {
         let r = zip::ZipArchive::new(value)?;
         Ok(EpubReader { inner: r })
     }
 }
+
 impl<T: Read + Seek + Sync + Send> EpubReaderTrait for EpubReader<T> {
     fn read(&mut self, book: &mut EpubBook) -> IResult<()> {
         let reader = &mut self.inner;
diff --git a/lib/src/mobi/reader.rs b/lib/src/mobi/reader.rs
index 50cf748..30bc5ff 100644
--- a/lib/src/mobi/reader.rs
+++ b/lib/src/mobi/reader.rs
@@ -394,7 +394,7 @@ where
     Ok(true)
 }
 
-pub struct MobiReader<T> {
+pub struct MobiReader<T: Read + Seek> {
     reader: BufReader<T>,
     pub(crate) pdb_header: PDBHeader,
     pub(crate) mobi_doc_header: MOBIDOCHeader,
@@ -406,6 +406,13 @@ pub struct MobiReader<T> {
     id: AtomicUsize,
 }
 
+impl<T: Read + Seek> Drop for MobiReader<T> {
+    fn drop(&mut self) {
+        self.release_memory();
+        self.exth_header = None;
+    }
+}
+
 impl<T: Read + Seek> MobiReader<T> {
     pub fn new(v: T) -> IResult<MobiReader<T>> {
         // let fs = std::fs::File::open(file)?;
@@ -649,6 +656,15 @@ impl<T: Read + Seek> MobiReader<T> {
 
         Ok(pos)
     }
+
+    pub fn release_memory(&mut self) {
+        if let Some(mut cache) = self.text_cache.take() {
+            // 显式清空 Vec，释放内存
+            cache.clear();
+            // Vec 会在离开作用域时自动释放，但 clear() 可以立即释放容量
+            cache.shrink_to_fit();
+        }
+    }
 }
 
 /// 文本分节

From b291ef89115bc180f249a87bee101adac4f0f145 Mon Sep 17 00:00:00 2001
From: Ding <michael19950415@outlook.com>
Date: Mon, 17 Nov 2025 10:24:37 +0800
Subject: [PATCH 2/2] Update core.rs

---
 lib/src/epub/core.rs | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/lib/src/epub/core.rs b/lib/src/epub/core.rs
index c625bd3..93a3fab 100644
--- a/lib/src/epub/core.rs
+++ b/lib/src/epub/core.rs
@@ -605,6 +605,11 @@ impl Display for EpubBook {
     )
     }
 }
+impl Drop for EpubBook {
+    fn drop(&mut self) {
+        self.release_memory();
+    }
+}
 
 impl EpubBook {
     iepub_derive::option_string_method!(info, creator);
@@ -744,7 +749,7 @@ impl EpubBook {
         self.assets.iter_mut()
     }
 
-    pub fn remove_assets(&mut self,index: usize){
+    pub fn remove_assets(&mut self, index: usize) {
         self.assets.remove(index);
     }
 
@@ -763,7 +768,7 @@ impl EpubBook {
         self.chapters.iter()
     }
 
-    pub fn remove_chapter(&mut self, index: usize){
+    pub fn remove_chapter(&mut self, index: usize) {
         self.chapters.remove(index);
     }
 
@@ -860,6 +865,16 @@ impl EpubBook {
         }
     }
 
+    pub fn release_memory(&mut self) {
+        self.reader = None;
+        self.chapters.clear();
+        self.assets.clear();
+        self.nav.clear();
+        self.meta.clear();
+        self.cover = None;
+        self.version = String::new();
+    }
+
     #[cfg(feature = "cache")]
     pub fn cache<T: AsRef<std::path::Path>>(&self, file: T) -> IResult<()> {
         std::fs::write(file, serde_json::to_string(self).unwrap())?;