Node.js: terminate HTTP connection

Show how to terminate an HTTP connection in Node.js

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Code sample

Node.js

// OK: await-ing a Promise before sending an HTTP response
await Promise.resolve();

// WRONG: HTTP functions should send an
// HTTP response instead of returning.
return Promise.resolve();

// HTTP functions should signal termination by returning an HTTP response.
// This should not be done until all background tasks are complete.
res.send(200);
res.end();

// WRONG: this may not execute since an
// HTTP response has already been sent.
return Promise.resolve();

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