From e852ba75cbdbc792ce830c5f4b42813f65c17e80 Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@gmail.com>
Date: Tue, 17 Mar 2026 22:45:56 -0700
Subject: [PATCH] Add size_hint to TrackedBody so throttled downloads get
 Content-Length

TrackedBody (used for download throttling) did not implement
size_hint(), causing HTTP/1.1 to fall back to chunked transfer
encoding instead of setting Content-Length. Go always sets
Content-Length explicitly for non-range responses.
---
 seaweed-volume/src/server/handlers.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/seaweed-volume/src/server/handlers.rs b/seaweed-volume/src/server/handlers.rs
index 06e87a678..e4d849bf4 100644
--- a/seaweed-volume/src/server/handlers.rs
+++ b/seaweed-volume/src/server/handlers.rs
@@ -61,6 +61,10 @@ impl http_body::Body for TrackedBody {
         let data = std::mem::take(&mut self.data);
         std::task::Poll::Ready(Some(Ok(http_body::Frame::data(bytes::Bytes::from(data)))))
     }
+
+    fn size_hint(&self) -> http_body::SizeHint {
+        http_body::SizeHint::with_exact(self.data.len() as u64)
+    }
 }
 
 impl Drop for TrackedBody {