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import { polyfill } from '@astrojs/webapi';
import type { SSRManifest } from 'astro';
import { NodeApp } from 'astro/app/node';
import type { IncomingMessage, ServerResponse } from 'http';
import type { Readable } from 'stream';
polyfill(globalThis, {
exclude: 'window document',
});
export function createExports(manifest: SSRManifest) {
const app = new NodeApp(manifest);
return {
async handler(req: IncomingMessage, res: ServerResponse, next?: (err?: unknown) => void) {
try {
const route = app.match(req);
if (route) {
try {
const response = await app.render(req);
await writeWebResponse(res, response);
} catch (err: unknown) {
if (next) {
next(err);
} else {
throw err;
}
}
} else if (next) {
return next();
}
} catch (err: unknown) {
if (!res.headersSent) {
res.writeHead(500, `Server error`);
res.end();
}
}
},
};
}
async function writeWebResponse(res: ServerResponse, webResponse: Response) {
const { status, headers, body } = webResponse;
res.writeHead(status, Object.fromEntries(headers.entries()));
if (body) {
for await (const chunk of body as unknown as Readable) {
res.write(chunk);
}
}
res.end();
}
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