astro/packages/integrations/node/src/middleware.ts
2022-10-12 21:27:56 +00:00

57 lines
1.3 KiB
TypeScript

import type { NodeApp } from 'astro/app/node';
import type { IncomingMessage, ServerResponse } from 'http';
import type { Readable } from 'stream';
export default function (app: NodeApp) {
return async function (
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(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, body } = webResponse;
if (app.setCookieHeaders) {
const setCookieHeaders: Array<string> = Array.from(app.setCookieHeaders(webResponse));
if (setCookieHeaders.length) {
res.setHeader('Set-Cookie', setCookieHeaders);
}
}
res.writeHead(status, Object.fromEntries(headers.entries()));
if (body) {
for await (const chunk of body as unknown as Readable) {
res.write(chunk);
}
}
res.end();
}