next/dist/esm/server/web/spec-extension/response.js

The React Framework

import { stringifyCookie } from '../../web/spec-extension/cookies';
import { NextURL } from '../next-url';
import { toNodeOutgoingHttpHeaders, validateURL } from '../utils';
import { ReflectAdapter } from './adapters/reflect';
import { ResponseCookies } from './cookies';
const INTERNALS = Symbol('internal response');
const REDIRECTS = new Set([
    301,
    302,
    303,
    307,
    308
]);
function handleMiddlewareField(init, headers) {
    var _init_request;
    if (init == null ? void 0 : (_init_request = init.request) == null ? void 0 : _init_request.headers) {
        if (!(init.request.headers instanceof Headers)) {
            throw Object.defineProperty(new Error('request.headers must be an instance of Headers'), "__NEXT_ERROR_CODE", {
                value: "E119",
                enumerable: false,
                configurable: true
            });
        }
        const keys = [];
        for (const [key, value] of init.request.headers){
            headers.set('x-middleware-request-' + key, value);
            keys.push(key);
        }
        headers.set('x-middleware-override-headers', keys.join(','));
    }
}
/**
 * This class extends the [Web `Response` API](https://developer.mozilla.org/docs/Web/API/Response) with additional convenience methods.
 *
 * Read more: [Next.js Docs: `NextResponse`](https://nextjs.org/docs/app/api-reference/functions/next-response)
 */ export class NextResponse extends Response {
    constructor(body, init = {}){
        super(body, init);
        const headers = this.headers;
        const cookies = new ResponseCookies(headers);
        const cookiesProxy = new Proxy(cookies, {
            get (target, prop, receiver) {
                switch(prop){
                    case 'delete':
                    case 'set':
                        {
                            return (...args)=>{
                                const result = Reflect.apply(target[prop], target, args);
                                const newHeaders = new Headers(headers);
                                if (result instanceof ResponseCookies) {
                                    headers.set('x-middleware-set-cookie', result.getAll().map((cookie)=>stringifyCookie(cookie)).join(','));
                                }
                                handleMiddlewareField(init, newHeaders);
                                return result;
                            };
                        }
                    default:
                        return ReflectAdapter.get(target, prop, receiver);
                }
            }
        });
        this[INTERNALS] = {
            cookies: cookiesProxy,
            url: init.url ? new NextURL(init.url, {
                headers: toNodeOutgoingHttpHeaders(headers),
                nextConfig: init.nextConfig
            }) : undefined
        };
    }
    [Symbol.for('edge-runtime.inspect.custom')]() {
        return {
            cookies: this.cookies,
            url: this.url,
            // rest of props come from Response
            body: this.body,
            bodyUsed: this.bodyUsed,
            headers: Object.fromEntries(this.headers),
            ok: this.ok,
            redirected: this.redirected,
            status: this.status,
            statusText: this.statusText,
            type: this.type
        };
    }
    get cookies() {
        return this[INTERNALS].cookies;
    }
    static json(body, init) {
        const response = Response.json(body, init);
        return new NextResponse(response.body, response);
    }
    static redirect(url, init) {
        const status = typeof init === 'number' ? init : (init == null ? void 0 : init.status) ?? 307;
        if (!REDIRECTS.has(status)) {
            throw Object.defineProperty(new RangeError('Failed to execute "redirect" on "response": Invalid status code'), "__NEXT_ERROR_CODE", {
                value: "E529",
                enumerable: false,
                configurable: true
            });
        }
        const initObj = typeof init === 'object' ? init : {};
        const headers = new Headers(initObj == null ? void 0 : initObj.headers);
        headers.set('Location', validateURL(url));
        return new NextResponse(null, {
            ...initObj,
            headers,
            status
        });
    }
    static rewrite(destination, init) {
        const headers = new Headers(init == null ? void 0 : init.headers);
        headers.set('x-middleware-rewrite', validateURL(destination));
        handleMiddlewareField(init, headers);
        return new NextResponse(null, {
            ...init,
            headers
        });
    }
    static next(init) {
        const headers = new Headers(init == null ? void 0 : init.headers);
        headers.set('x-middleware-next', '1');
        handleMiddlewareField(init, headers);
        return new NextResponse(null, {
            ...init,
            headers
        });
    }
}

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