From 5684598709e46f5c13d4c3262e5199b4a7bbeb7b Mon Sep 17 00:00:00 2001
From: sifat <hossain0338@gmail.com>
Date: Sat, 16 Dec 2023 14:30:41 +0600
Subject: [PATCH] Add support for resumable downloads in app.js

---
 app.js | 46 ++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 42 insertions(+), 4 deletions(-)

diff --git a/app.js b/app.js
index e6910db..9b22036 100644
--- a/app.js
+++ b/app.js
@@ -122,14 +122,52 @@ module.exports = ({ sharedPath: sharedPathIn, port, maxUploadSize, zipCompressio
     if (isDir) {
       await serveDirZip(filePath, res);
     } else {
-      if (forceDownload) {
-        // NOTE: Must support non latin characters
+      try {
+        const stat = await fs.stat(filePath);
+        const fileSize = stat.size;
+  
+        // if (forceDownload) {
+        //   // Set the filename in the Content-disposition header
+        //   res.set('Content-disposition', contentDisposition(basename(filePath)));
+        // }
+
         res.set('Content-disposition', contentDisposition(basename(filePath)));
-      }
 
-      await pipeline(fs.createReadStream(filePath), res);
+        // Check if the client supports resumable downloads
+        const range = req.headers.range;
+        if (range) {
+          const parts = range.replace(/bytes=/, '').split('-');
+          const start = parseInt(parts[0], 10);
+          const end = parts[1] ? parseInt(parts[1], 10) : fileSize - 1;
+          const chunkSize = (end - start) + 1;
+  
+          // Set headers for resumable download
+          res.status(206).set({
+            'Content-Range': `bytes ${start}-${end}/${fileSize}`,
+            'Accept-Ranges': 'bytes',
+            'Content-Length': chunkSize,
+            'Content-Type': 'application/octet-stream', // Adjust the content type as needed
+          });
+  
+          // Create a readable stream to send the requested chunk
+          const fileStream = fs.createReadStream(filePath, { start, end });
+          fileStream.pipe(res);
+        } else {
+          // Standard download without resuming
+          res.writeHead(200, {
+            'Content-Type': 'application/octet-stream', // Adjust the content type as needed
+            'Content-Length': fileSize,
+          });
+  
+          await pipeline(fs.createReadStream(filePath), res);
+        }
+      } catch (err) {
+        console.error('Error while processing download request:', err);
+        res.status(500).send({ error: { message: 'Internal Server Error' } });
+      }
     }
   }));
+  
 
   app.get('/api/browse', asyncHandler(async (req, res) => {
     const curRelPath = req.query.p || '/';