1 files changed, 75 insertions, 0 deletions
diff --git a/packages/webapi/src/lib/fetch.ts b/packages/webapi/src/lib/fetch.ts
new file mode 100644
index 000000000..8ab1358e7
--- /dev/null
+++ b/packages/webapi/src/lib/fetch.ts
@@ -0,0 +1,75 @@
+import { default as nodeFetch, Headers, Request, Response } from 'node-fetch/src/index.js'
+import Stream from 'node:stream'
+import * as _ from './utils'
+
+export { Headers, Request, Response }
+
+export const fetch = {
+	fetch(resource: string | URL | Request, init?: Partial<FetchInit>): Promise<Response> {
+		const resourceURL = new URL(
+			_.__object_isPrototypeOf(Request.prototype, resource)
+				? (resource as Request).url
+			: _.pathToPosix(resource),
+			typeof Object(globalThis.process).cwd === 'function' ? 'file:' + _.pathToPosix(process.cwd()) + '/' : 'file:'
+		)
+
+		if (resourceURL.protocol.toLowerCase() === 'file:') {
+			return import('node:fs').then(
+				fs => {
+					try {
+						const stats = fs.statSync(resourceURL)
+						const body = fs.createReadStream(resourceURL)
+
+						return new Response(
+							body,
+							{
+								status: 200,
+								statusText: '',
+								headers: {
+									'content-length': String(stats.size),
+									'date': new Date().toUTCString(),
+									'last-modified': new Date(stats.mtimeMs).toUTCString(),
+								}
+							}
+						)
+					} catch (error) {
+						const body = new Stream.Readable()
+
+						body._read = () => {}
+						body.push(null)
+
+						return new Response(
+							body,
+							{
+								status: 404,
+								statusText: '',
+								headers: {
+									'date': new Date().toUTCString(),
+								}
+							}
+						)
+					}
+				}
+			)
+		} else {
+			return nodeFetch(resource, init)
+		}
+	}
+}.fetch
+
+type USVString = ({} & string)
+
+interface FetchInit {
+	body: Blob | BufferSource | FormData | URLSearchParams | ReadableStream | USVString
+	cache: 'default' | 'no-store' | 'reload' | 'no-cache' | 'force-cache' | 'only-if-cached'
+	credentials: 'omit' | 'same-origin' | 'include'
+	headers: Headers | Record<string, string>
+	method: 'GET' | 'HEAD' | 'POST' | 'PUT' | 'DELETE' | 'CONNECT' | 'OPTIONS' | 'TRACE' | 'PATCH' | USVString
+	mode: 'cors' | 'no-cors' | 'same-origin' | USVString
+	redirect: 'follow' | 'manual' | 'error'
+	referrer: USVString
+	referrerPolicy: 'no-referrer' | 'no-referrer-when-downgrade' | 'same-origin' | 'origin' | 'strict-origin' | 'origin-when-cross-origin' | 'strict-origin-when-cross-origin' | 'unsafe-url'
+	integrity: USVString
+	keepalive: boolean
+	signal: AbortSignal
+}