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| 1 | +import { createServer, IncomingMessage, OutgoingHttpHeaders, Server, ServerOptions, ServerResponse } from 'node:http'; |
| 2 | +import { pipeline } from 'node:stream'; |
| 3 | +import { Headers, BodyInit, Request, Response } from 'undici'; |
| 4 | +import { FetchEvent } from '@eggjs/tegg-types/standalone'; |
| 5 | + |
| 6 | +export type FetchEventListener = (event: FetchEvent) => Promise<Response>; |
| 7 | + |
| 8 | +export interface StartHTTPServerOptions extends ServerOptions { |
| 9 | + listener: FetchEventListener; |
| 10 | +} |
| 11 | + |
| 12 | +export class StandaloneTestUtil { |
| 13 | + static skipOnNode(minVersion = 18) { |
| 14 | + const version = parseInt(process.versions.node.split('.')[0], 10); |
| 15 | + return version < minVersion; |
| 16 | + } |
| 17 | + |
| 18 | + static #buildRequest(req: IncomingMessage): Request { |
| 19 | + const origin = `http://${req.headers.host ?? 'localhost'}`; |
| 20 | + const url = new URL(req.url ?? '', origin); |
| 21 | + |
| 22 | + const body: BodyInit | null = req.method === 'GET' || req.method === 'HEAD' ? null : req; |
| 23 | + |
| 24 | + req.headers.host = url.host; |
| 25 | + |
| 26 | + const headers = new Headers(); |
| 27 | + for (const [ name, values ] of Object.entries(req.headers)) { |
| 28 | + if (Array.isArray(values)) { |
| 29 | + for (const value of values) { |
| 30 | + headers.append(name, value); |
| 31 | + } |
| 32 | + } else if (values !== undefined) { |
| 33 | + headers.append(name, values); |
| 34 | + } |
| 35 | + } |
| 36 | + |
| 37 | + return new Request(url, { |
| 38 | + method: req.method, |
| 39 | + headers, |
| 40 | + body, |
| 41 | + duplex: body ? 'half' : undefined, |
| 42 | + }); |
| 43 | + } |
| 44 | + |
| 45 | + static #createHTTPServerListener(listener: FetchEventListener) { |
| 46 | + return async (req: IncomingMessage, res: ServerResponse) => { |
| 47 | + const request = StandaloneTestUtil.#buildRequest(req); |
| 48 | + // TODO currently fake FetchEvent |
| 49 | + const event: any = new Event('fetch'); |
| 50 | + event.request = request; |
| 51 | + const response = await listener(event); |
| 52 | + |
| 53 | + const headers: OutgoingHttpHeaders = {}; |
| 54 | + for (const [ key, value ] of response.headers) { |
| 55 | + headers[key.toLowerCase()] = value; |
| 56 | + } |
| 57 | + |
| 58 | + res.writeHead(response.status, headers); |
| 59 | + |
| 60 | + if (!response.body) { |
| 61 | + res.end(); |
| 62 | + return; |
| 63 | + } |
| 64 | + pipeline(response.body, res, e => { |
| 65 | + if (e) { |
| 66 | + console.error(`pipeline writing response error for url ${response.url}`, e); |
| 67 | + res.end(); |
| 68 | + } |
| 69 | + }); |
| 70 | + }; |
| 71 | + } |
| 72 | + |
| 73 | + static startHTTPServer(host: string, port: number, { listener, ...options }: StartHTTPServerOptions) { |
| 74 | + const serverListener = StandaloneTestUtil.#createHTTPServerListener(listener); |
| 75 | + const server = createServer(options ?? {}, serverListener); |
| 76 | + |
| 77 | + return new Promise<Server>(resolve => { |
| 78 | + server.listen(port, host, () => resolve(server)); |
| 79 | + }); |
| 80 | + } |
| 81 | +} |
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