git handler: allow Git-Protocol in CORS preflight (#371) - #372
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melvincarvalho merged 1 commit intoMay 8, 2026
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Browser git clients on protocol v2 (e.g. isomorphic-git) send a Git-Protocol: version=2 request header. Without it in Access-Control-Allow-Headers, the preflight fails and the smart-HTTP flow never starts cross-origin. Two callsites — the OPTIONS preflight handler and the streaming-response header block both replied with the same hard-coded list. Adding "Git-Protocol" to both. The frontend's protocolVersion: 1 workaround can go away once a server with this fix ships.
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Pull request overview
Adds CORS support for Git smart-HTTP protocol v2 by allowing the Git-Protocol request header in the git handler responses, enabling browser-based git clients (e.g., isomorphic-git) to work without downgrading to protocol v1.
Changes:
- Include Git-Protocol in Access-Control-Allow-Headers for the git handler’s OPTIONS preflight response.
- Include Git-Protocol in Access-Control-Allow-Headers for the streaming response path (raw header block).
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Closes #371.
Summary
Test plan