Fix: Audio player skip behavior and range requests

app/api/audio/[filename]/route.ts

@@ -1,5 +1,6 @@
 import { NextRequest, NextResponse } from 'next/server';
-import { readFile, stat } from 'fs/promises';
+import { stat } from 'fs/promises';
+import { createReadStream } from 'fs';
 import path from 'path';
 
 export async function GET(
@@ -30,24 +31,59 @@ export async function GET(
             return new NextResponse('Forbidden', { status: 403 });
         }
 
-        // Check if file exists
-        try {
-            await stat(filePath);
-        } catch {
-            return new NextResponse('File not found', { status: 404 });
+        const stats = await stat(filePath);
+        const fileSize = stats.size;
+        const range = request.headers.get('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;
+
+            const stream = createReadStream(filePath, { start, end });
+
+            // Convert Node stream to Web stream
+            const readable = new ReadableStream({
+                start(controller) {
+                    stream.on('data', (chunk: any) => controller.enqueue(chunk));
+                    stream.on('end', () => controller.close());
+                    stream.on('error', (err: any) => controller.error(err));
+                }
+            });
+
+            return new NextResponse(readable, {
+                status: 206,
+                headers: {
+                    'Content-Range': `bytes ${start}-${end}/${fileSize}`,
+                    'Accept-Ranges': 'bytes',
+                    'Content-Length': chunksize.toString(),
+                    'Content-Type': 'audio/mpeg',
+                    'Cache-Control': 'public, max-age=3600, must-revalidate',
+                },
+            });
+        } else {
+            const stream = createReadStream(filePath);
+
+            // Convert Node stream to Web stream
+            const readable = new ReadableStream({
+                start(controller) {
+                    stream.on('data', (chunk: any) => controller.enqueue(chunk));
+                    stream.on('end', () => controller.close());
+                    stream.on('error', (err: any) => controller.error(err));
+                }
+            });
+
+            return new NextResponse(readable, {
+                status: 200,
+                headers: {
+                    'Content-Length': fileSize.toString(),
+                    'Content-Type': 'audio/mpeg',
+                    'Accept-Ranges': 'bytes',
+                    'Cache-Control': 'public, max-age=3600, must-revalidate',
+                },
+            });
         }
-
-        // Read file
-        const fileBuffer = await readFile(filePath);
-
-        // Return with proper headers
-        return new NextResponse(fileBuffer, {
-            headers: {
-                'Content-Type': 'audio/mpeg',
-                'Accept-Ranges': 'bytes',
-                'Cache-Control': 'public, max-age=3600, must-revalidate',
-            },
-        });
     } catch (error) {
         console.error('Error serving audio file:', error);
         return new NextResponse('Internal Server Error', { status: 500 });