@whatwg-node/server/esm/internal-plugins/useFetchEvent.js

Fetch API compliant HTTP Server adapter

import { completeAssign } from '../utils.js';
export function isFetchEvent(event) {
    return event != null && event.request != null && event.respondWith != null;
}
// Required for envs like nextjs edge runtime
function isRequestAccessible(serverContext) {
    try {
        return !!serverContext?.request;
    }
    catch {
        return false;
    }
}
export function useFetchEvent() {
    const eventMap = new WeakMap();
    return {
        onRequestAdapt({ args: [event, ...restOfCtx], setRequest, setServerContext }) {
            if (isRequestAccessible(event)) {
                setRequest(event.request);
                const serverContext = restOfCtx.length > 0 ? completeAssign(...restOfCtx) : event;
                setServerContext(serverContext);
            }
        },
        onResponse({ request, response }) {
            const event = eventMap.get(request);
            if (isFetchEvent(event)) {
                event.respondWith(response);
            }
        },
    };
}