@whatwg-node/server
Version:
Fetch API compliant HTTP Server adapter
56 lines (55 loc) • 2.08 kB
JavaScript
import { Response as DefaultResponseCtor } from '@whatwg-node/fetch';
import { isPromise } from '../utils.js';
export function createDefaultErrorHandler(ResponseCtor = DefaultResponseCtor) {
return function defaultErrorHandler(e) {
if (e.details || e.status || e.headers || e.name === 'HTTPError') {
return new ResponseCtor(typeof e.details === 'object' ? JSON.stringify(e.details) : e.message, {
status: e.status,
headers: e.headers || {},
});
}
console.error(e);
return createDefaultErrorResponse(ResponseCtor);
};
}
function createDefaultErrorResponse(ResponseCtor) {
if (ResponseCtor.error) {
return ResponseCtor.error();
}
return new ResponseCtor(null, { status: 500 });
}
export class HTTPError extends Error {
status;
message;
headers;
details;
name = 'HTTPError';
constructor(status = 500, message, headers = {}, details) {
super(message);
this.status = status;
this.message = message;
this.headers = headers;
this.details = details;
Error.captureStackTrace(this, HTTPError);
}
}
export function useErrorHandling(onError) {
return {
onRequest({ requestHandler, setRequestHandler, fetchAPI }) {
const errorHandler = onError || createDefaultErrorHandler(fetchAPI.Response);
setRequestHandler(function handlerWithErrorHandling(request, serverContext) {
try {
const response$ = requestHandler(request, serverContext);
if (isPromise(response$)) {
return response$.catch(e => errorHandler(e, request, serverContext) ||
createDefaultErrorResponse(fetchAPI.Response));
}
return response$;
}
catch (e) {
return (errorHandler(e, request, serverContext) || createDefaultErrorResponse(fetchAPI.Response));
}
});
},
};
}