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import type { NodeApp } from 'astro/app/node';
import type { IncomingMessage, ServerResponse } from 'http';
import type { Readable } from 'stream';
import { createOutgoingHttpHeaders } from './createOutgoingHttpHeaders';
import { responseIterator } from './response-iterator';
import type { Options } from './types';
export default function (app: NodeApp, mode: Options['mode']) {
return async function (
req: IncomingMessage,
res: ServerResponse,
next?: (err?: unknown) => void
) {
try {
const route =
mode === 'standalone' ? app.match(req, { matchNotFound: true }) : app.match(req);
if (route) {
try {
const response = await app.render(req);
await writeWebResponse(app, res, response);
} catch (err: unknown) {
if (next) {
next(err);
} else {
throw err;
}
}
} else if (next) {
return next();
} else {
res.writeHead(404);
res.end('Not found');
}
} catch (err: unknown) {
if (!res.headersSent) {
res.writeHead(500, `Server error`);
res.end();
}
}
};
}
async function writeWebResponse(app: NodeApp, res: ServerResponse, webResponse: Response) {
const { status, headers } = webResponse;
if (app.setCookieHeaders) {
const setCookieHeaders: Array<string> = Array.from(app.setCookieHeaders(webResponse));
if (setCookieHeaders.length) {
for (const setCookieHeader of setCookieHeaders) {
webResponse.headers.append('set-cookie', setCookieHeader);
}
}
}
const nodeHeaders = createOutgoingHttpHeaders(headers);
res.writeHead(status, nodeHeaders);
if (webResponse.body) {
try {
for await (const chunk of responseIterator(webResponse) as unknown as Readable) {
res.write(chunk);
}
} catch (err: any) {
console.error(err?.stack || err?.message || String(err));
res.write('Internal server error');
}
}
res.end();
}
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