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Fix response header management in Fastify plugin #517

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Mar 7, 2023
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8 changes: 8 additions & 0 deletions packages/connect-fastify/src/fastify-connect-plugin.ts
Original file line number Diff line number Diff line change
Expand Up @@ -87,6 +87,14 @@ export function fastifyConnectPlugin(
req.body as JsonValue | undefined
)
);
// Fastify maintains response headers on the reply object and only moves them to
// the raw response during reply.send, but we are not using reply.send with this plugin.
// So we need to manually copy them to the raw response before handing off to vanilla Node.
for (const [key, value] of Object.entries(reply.getHeaders())) {
if (value !== undefined) {
reply.raw.setHeader(key, value);
}
}
await universalResponseToNodeResponse(uRes, reply.raw);
}
);
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