fetch library
Version vom
Dieses Skript sollte nicht direkt installiert werden. Es handelt sich hier um eine Bibliothek für andere Skripte, welche über folgenden Befehl in den Metadaten eines Skriptes eingebunden wird // @require https://update.greasyfork.org/scripts/528458/1545253/UTILS_FETCH%20Library.js
// ==UserScript==
// @name UTILS_FETCH Library
// @namespace dannysaurus.epik
// @version 1.0
// @description fetch library
//
// @license MIT
// @grant GM_xmlhttpRequest
// @grant GM.getValue
// @grant GM.setValue
// @grant unsafeWindow
// ==/UserScript==
/* jslint esversion: 11 */
/* global unsafeWindow */
(() => {
'use strict';
unsafeWindow.dannysaurus_epik ||= {};
unsafeWindow.dannysaurus_epik.libraries ||= {};
unsafeWindow.dannysaurus_epik.libraries.UTILS_FETCH = (() => {
/**
* General fetch method using GM_xmlhttpRequest.
*
* @param {string} url - The URL to fetch the data from.
* @param {string} [method='GET'] - The HTTP method to use for the request.
* @returns {Promise<Response>} The fetched response.
* @throws {Error} If there is an error fetching the data.
*/
const fetch = async (url, method = 'GET') => {
return new Promise((resolve, reject) => GM_xmlhttpRequest({
method: method,
url: url,
onload: (response) => {
if (response.status >= 200 && response.status < 300) {
resolve(response);
} else {
console.error('HTTP error! status:', response.status);
reject(new Error(`HTTP error! status: ${response.status}`));
}
},
onerror: (error) => {
console.error('Request error:', error);
reject(error);
}
}));
};
/**
* Fetches JSON data from the specified URL.
*
* @param {string} url - The URL to fetch the JSON data from.
* @param {string} [method='GET'] - The HTTP method to use for the request.
* @returns {Promise<Object>} The fetched JSON data.
* @throws {Error} If there is an error fetching or parsing the JSON data.
*/
const fetchJSON = async (url, method = 'GET') => {
const response = await UTILS.fetch(url, method);
try {
return JSON.parse(response.responseText);
} catch (error) {
console.error('Error parsing JSON:', error);
throw error;
}
};
/**
* Fetches the names of accepted users from the users - JSON.
*
* @param {Object} options
* @param {string} [options.url] - The URL to fetch the JSON data from.
* @param {string} [options.localStorageId] - The ID to store the fetched JSON data in the local storage.
* @param {number} [options.delayMs] - The delay in milliseconds to wait before fetching the data again.
*
* @returns {Promise<Object>} fetched JSON data.
*/
const fetchJsonWithStorageCache = (() => {
const cacheByUrl = {};
return async ({ url, localStorageId, delayMs } = {}) => {
localStorageId = localStorageId.replace(/\s/g, '');
const cache = cacheByUrl[url] ||= {
jsonData: null,
timestamp: 0,
};
let fetchedJsonData = null;
if (cache.jsonData === null || Date.now() - cache.timestamp >= delayMs) {
try {
fetchedJsonData = await UTILS.fetchJSON(url);
const propertyNamesCached = Object.keys(cache.jsonData || {});
const propertyNamesFetched = Object.keys(fetchedJsonData || {});
if (propertyNamesCached.length !== propertyNamesFetched.length
|| propertyNamesCached.some(propName => propertyNamesCached[propName] !== propertyNamesFetched[propName])
) {
try {
await GM.setValue(localStorageId, fetchedJsonData);
} catch (storageError) {
console.error(`Error saving json data to local storage:`, storageError);
}
}
} catch (error) {
try {
fetchedJsonData = await GM.getValue(localStorageId, null);
} catch (storageError) {
console.error(`Error loading ${localStorageId} from local storage:`, storageError);
}
}
if (fetchedJsonData) {
cache.jsonData = fetchedJsonData;
}
cache.timestamp = Date.now();
}
return cache.jsonData || {};
};
})();
return {
fetch,
fetchJSON,
fetchJsonWithStorageCache,
};
})();
})();