73 lines
2.0 KiB
TypeScript
73 lines
2.0 KiB
TypeScript
import { assert } from "./errors.js";
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import type { FetchRequest, FetchCancelSignal, GetUrlResponse } from "./fetch.js";
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declare global {
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class Headers {
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constructor(values: Array<[ string, string ]>);
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forEach(func: (v: string, k: string) => void): void;
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}
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class Response {
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status: number;
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statusText: string;
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headers: Headers;
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arrayBuffer(): Promise<ArrayBuffer>;
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}
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type FetchInit = {
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method?: string,
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headers?: Headers,
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body?: Uint8Array
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};
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function fetch(url: string, init: FetchInit): Promise<Response>;
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}
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// @TODO: timeout is completely ignored; start a Promise.any with a reject?
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export async function getUrl(req: FetchRequest, _signal?: FetchCancelSignal): Promise<GetUrlResponse> {
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const protocol = req.url.split(":")[0].toLowerCase();
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assert(protocol === "http" || protocol === "https", `unsupported protocol ${ protocol }`, "UNSUPPORTED_OPERATION", {
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info: { protocol },
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operation: "request"
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});
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assert(protocol === "https" || !req.credentials || req.allowInsecureAuthentication, "insecure authorized connections unsupported", "UNSUPPORTED_OPERATION", {
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operation: "request"
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});
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let signal: undefined | AbortSignal = undefined;
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if (_signal) {
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const controller = new AbortController();
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signal = controller.signal;
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_signal.addListener(() => { controller.abort(); });
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}
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const init = {
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method: req.method,
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headers: new Headers(Array.from(req)),
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body: req.body || undefined,
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signal
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};
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const resp = await fetch(req.url, init);
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const headers: Record<string, string> = { };
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resp.headers.forEach((value, key) => {
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headers[key.toLowerCase()] = value;
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});
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const respBody = await resp.arrayBuffer();
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const body = (respBody == null) ? null: new Uint8Array(respBody);
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return {
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statusCode: resp.status,
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statusMessage: resp.statusText,
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headers, body
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};
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}
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