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NextJS API Util
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import { NextApiRequest, NextApiResponse } from "next"; | |
import { StatusCodes, getReasonPhrase } from "http-status-codes"; | |
type NextHandler<R> = (req: NextApiRequest, res: NextApiResponse<R>) => void; | |
type ResponseEnhanced<R> = { | |
status?: StatusCodes | number; | |
headers?: Record<string, string>; | |
body?: R; | |
}; | |
export type TypedNextApiRequest<Q> = Omit<NextApiRequest, "query"> & { | |
query: Q; | |
}; | |
type HandlerParam<R, Q> = ( | |
req: TypedNextApiRequest<Q> | |
) => Promise<ResponseEnhanced<R>>; | |
type Method = "post" | "get" | "delete" | "patch" | "put"; | |
function makeHandler(method?: Method) { | |
return <Q, R>(inner: HandlerParam<R, Q>): NextHandler<R> => { | |
return (req: NextApiRequest, res: NextApiResponse) => { | |
if (method && req.method?.toLowerCase() !== method) { | |
return res.status(StatusCodes.METHOD_NOT_ALLOWED).send({ | |
error: getReasonPhrase(StatusCodes.METHOD_NOT_ALLOWED), | |
}); | |
} | |
return inner(req as NextApiRequest & { query: Q }) | |
.then((_res) => { | |
const status = _res.status || StatusCodes.OK; | |
const headers = _res.headers || {}; | |
Object.keys(headers).forEach((key) => | |
res.setHeader(key, headers[key]) | |
); | |
res.status(status).send(_res.body || ""); | |
}) | |
.catch((err) => { | |
console.log(`Uncaught error: ${err}`); | |
res.status(StatusCodes.INTERNAL_SERVER_ERROR).json({ | |
error: getReasonPhrase(StatusCodes.INTERNAL_SERVER_ERROR), | |
}); | |
}); | |
}; | |
}; | |
} | |
const _defaultHandler = makeHandler(); | |
export function handler<Q, R>(inner: HandlerParam<R, Q>) { | |
return _defaultHandler<Q, R>(inner); | |
} | |
handler.get = makeHandler("get"); | |
handler.post = makeHandler("post"); | |
handler.delete = makeHandler("delete"); | |
handler.put = makeHandler("get"); | |
handler.patch = makeHandler("get"); |
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