82 lines
2.5 KiB
TypeScript
82 lines
2.5 KiB
TypeScript
import { assert, makeError } from "./errors.js";
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import type {
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FetchGetUrlFunc, FetchRequest, FetchCancelSignal, GetUrlResponse
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} from "./fetch.js";
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export function createGetUrl(options?: Record<string, any>): FetchGetUrlFunc {
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async function getUrl(req: FetchRequest, _signal?: FetchCancelSignal): Promise<GetUrlResponse> {
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assert(_signal == null || !_signal.cancelled, "request cancelled before sending", "CANCELLED");
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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 error: null | Error = null;
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const controller = new AbortController();
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const timer = setTimeout(() => {
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error = makeError("request timeout", "TIMEOUT");
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controller.abort();
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}, req.timeout);
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if (_signal) {
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_signal.addListener(() => {
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error = makeError("request cancelled", "CANCELLED");
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controller.abort();
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});
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}
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const init = Object.assign({ }, options, {
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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: controller.signal
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});
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let resp: Awaited<ReturnType<typeof fetch>>;
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try {
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resp = await fetch(req.url, init);
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} catch (_error) {
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clearTimeout(timer);
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if (error) { throw error; }
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throw _error;
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}
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clearTimeout(timer);
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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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return getUrl;
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}
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// @TODO: remove in v7; provided for backwards compat
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const defaultGetUrl: FetchGetUrlFunc = createGetUrl({ });
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export async function getUrl(req: FetchRequest, _signal?: FetchCancelSignal): Promise<GetUrlResponse> {
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return defaultGetUrl(req, _signal);
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}
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