@deltares/fews-pi-requests/lib/esm/utils/splitUrl.js

Library for making requests to the FEWS PI webservice

import { duplicates } from './duplicates.js';
function mostFrequentParameter(url) {
    const duplicateEntries = duplicates(Array.from(url.searchParams.keys()));
    const keys = Array.from(duplicateEntries.keys());
    let max = 0;
    let split = keys[0];
    for (const [key, value] of duplicateEntries) {
        if (value > max) {
            max = value;
            split = key;
        }
    }
    return split;
}
export function splitUrl(url, maxLength = 2000, parameter) {
    if (url.toString().length <= maxLength)
        return [url];
    const baseUrl = new URL(url.toString());
    const split = parameter !== undefined ? parameter : mostFrequentParameter(url);
    baseUrl.searchParams.delete(split);
    const urls = [];
    let newUrl = new URL(baseUrl.toString());
    for (const value of url.searchParams.getAll(split)) {
        if (newUrl.toString().length + split.length + value.length + 2 > maxLength) {
            urls.push(new URL(newUrl.toString()));
            newUrl = new URL(baseUrl.toString());
        }
        newUrl.searchParams.append(split, value);
        if (newUrl.toString().length > maxLength) {
            throw new Error(`Cannot split url by query parameter '${split}' to be shorter than ${maxLength} <= ${newUrl.toString()}.`);
        }
    }
    urls.push(newUrl);
    return urls;
}
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