Safari and other browsers require Accept-Ranges: bytes and 206 Partial
Content responses to play video. Without this, large videos fail to load
(especially in Safari) because the entire file had to buffer in memory
before sending.
- Replace readFile + Buffer with createReadStream for efficient streaming
- Parse Range header (start-end, start-, and suffix -N forms)
- Return 206 Partial Content with Content-Range for range requests
- Return 416 Range Not Satisfiable for out-of-bounds ranges
- Add Accept-Ranges: bytes to all raw file responses
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
