Add support for modifying Content-Type

streamtg.py

@@ -111,6 +111,13 @@ async def handler(request):
                 )
             status = 206
     length = end - offset + 1
+    headers = {
+        'Content-Range': f'bytes {offset}-{end}/{max_size}',
+        'Content-Length': str(length),
+        'Accept-Ranges': 'bytes'
+    }
+    if content_type := requests.headers.get('Content-Type'):
+        headers['Content-Type'] = content_type
 
     async def download():
         tmp_offset = offset
@@ -131,11 +138,7 @@ async def handler(request):
 
     return web.Response(status=status,
         body=download(),
-        headers={
-            'Content-Range': f'bytes {offset}-{end}/{max_size}',
-            'Content-Length': str(length),
-            'Accept-Ranges': 'bytes'
-        }
+        headers=headers
     )
 
 app = web.Application()