Add MF-Original-Hostname header when using the upstream option#11883
Merged
dario-piotrowicz merged 2 commits intomainfrom Jan 14, 2026
Merged
Add MF-Original-Hostname header when using the upstream option#11883dario-piotrowicz merged 2 commits intomainfrom
MF-Original-Hostname header when using the upstream option#11883dario-piotrowicz merged 2 commits intomainfrom
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@cloudflare/pages-shared
@cloudflare/unenv-preset
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emily-shen
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Jan 13, 2026
X-Miniflare-Original-Hostname header when using the upstream optionMF-Original-Hostname header when using the upstream option
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This PR was mostly written by Claude Opus 4.5, I've made minor modifications and reviewed the code
Fixes #11876
When using the
upstreamoption in Miniflare, theHostheader is rewritten to match the upstream server, which means the original hostname is lost. This change adds a newMF-Original-Hostnameheader that preserves the original hostname from the incoming request.A picture of a cute animal (not mandatory, but encouraged)