@nodescript/core/out/main/util/fetch.js

Visual programming language for Browser and Node

import { parseJson } from './json.js';
export const fetchRelay = async (req, body) => {
    const fetchServiceUrl = req.connectOptions?.fetchServiceUrl ?? 'https://fetch.nodescript.dev/request';
    const res = await fetch(fetchServiceUrl, {
        method: 'POST',
        headers: makeControlHeaders(req),
        body,
    });
    if (!res.ok) {
        const responseBodyText = await res.text();
        const message = (parseJson(responseBodyText, {})).message ?? responseBodyText;
        throw new FetchError(`Fetch failed: ${res.status} ${message}`);
    }
    const status = Number(res.headers.get('x-fetch-status')) || 0;
    const headers = parseJson(res.headers.get('x-fetch-headers') ?? '{}', {});
    return {
        status,
        headers,
        body: res,
    };
};
function makeControlHeaders(req) {
    const headers = {
        'x-fetch-method': req.method,
        'x-fetch-url': req.url,
        'x-fetch-headers': JSON.stringify(req.headers),
        'x-fetch-connect-options': JSON.stringify(req.connectOptions ?? {}),
    };
    if (req.proxy) {
        headers['x-fetch-proxy'] = req.proxy.trim();
    }
    if (req.timeout != null) {
        headers['x-fetch-timeout'] = String(req.timeout);
    }
    return headers;
}
export class FetchError extends Error {
    constructor(message, code) {
        super(message || code || 'Request failed');
        this.name = this.constructor.name;
        this.status = 500;
        this.details = {};
        this.details = {
            code,
        };
        this.stack = '';
    }
}
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