https://printinthebag.co.uk/static/script/modules-v4/helpers/net.js?v=20260710T1533

1// net.js
2
3// CONFIG
4const DEFAULT_CREDENTIALS = "same-origin";
5const VBM_REQUEST_HEADER = { "VBM-Request": "true" };
6const JSON_HEADER = { "Content-Type": "application/json" };
7
8// HELPERS
9const mergeHeaders = (...headerObjects) =>
10    headerObjects.reduce((acc, headers) => ({ ...acc, ...(headers || {}) }), {});
11
12const buildFetchOptions = ({ method, credentials, headers, ...rest } = {}) => ({
13    method,
14    credentials: credentials ?? DEFAULT_CREDENTIALS,
15    ...rest,
16    headers: mergeHeaders(VBM_REQUEST_HEADER, headers),
17});
18
19const assertOkOrReturn = async (res, { url, returnErrors } = {}) => {
20    if (returnErrors && !res.ok) return res;
21    if (!res.ok) throw new Error(`HTTP ${res.status} for ${url}`);
22    return res;
23};
24
25// EXPORTS
26export const getHTML = async (url, options = {}) => {
27    const { meta = false, ...rest } = options;
28
29    const fetchOptions = buildFetchOptions(rest);
30    const res = await fetch(url, fetchOptions);
31
32    await assertOkOrReturn(res, { url });
33
34    const html = await res.text();
35    return meta ? { html, res } : html;
36};
37
38export const postHTML = async (url, body, options = {}) => {
39    const {
40        meta = false,
41        returnErrors = false,
42        returnErrorText = false,
43        headers = {},
44        credentials = "same-origin",
45        ...rest
46    } = options;
47
48    const res = await fetch(url, {
49        method: "POST",
50        credentials,
51        headers: {
52            "VBM-Request": "true",
53            "Content-Type": "application/json",
54            ...headers,
55        },
56        body: JSON.stringify(body),
57        ...rest,
58    });
59
60    if (returnErrors && !meta && !res.ok) return res;
61
62    const text = await res.text();
63
64    if (!res.ok && returnErrorText) {
65        return meta ? { text, res } : text;
66    }
67
68    if (!res.ok) throw new Error(`HTTP ${res.status} for ${url}`);
69
70    if (meta) return { text, res };
71
72    return text;
73};