72 lines
1.8 KiB
JavaScript
72 lines
1.8 KiB
JavaScript
export const fetchMixin = function(superClass) {
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return class extends superClass {
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constructor() {
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super();
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this.__abortControllers = new Map();
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}
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get(url) {
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return fetch(url).then(response => response.json());
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}
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head(url) {
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return fetch(url, { method: 'HEAD' });
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}
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async post(url, data, overwrite = true) {
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this.__cancelRunningRequest(url);
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if (overwrite === true) {
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const ac = new AbortController();
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this.__abortControllers.set(url, ac);
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}
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try {
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const reqOptions = {
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method: 'POST',
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signal: overwrite ? this.__abortControllers.get(url).signal : null,
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mode: 'cors',
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cache: 'no-cache',
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headers: {
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'Content-Type': 'application/json; charset=utf-8'
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},
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referrer: 'no-referrer',
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body: JSON.stringify(data)
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};
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document.dispatchEvent(new CustomEvent('before-request', { detail: reqOptions, bubbles: true, composed: true }));
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const result = await fetch(url, reqOptions).then(response => response.json());
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this.__abortControllers.delete(url);
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if (result.statusCode === 500) {
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console.error(result);
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}
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return result;
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} catch (err) {
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if (err.name === 'AbortError') {
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return { statusCode: -1, error: err };
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} else {
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this.__abortControllers.delete(url);
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return { statusCode: null, error: err };
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}
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}
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}
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isInFlight(url) {
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return Boolean(this.__abortControllers.get(url));
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}
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__cancelRunningRequest(url) {
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if (this.__abortControllers.has(url)) {
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try {
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this.__abortControllers.get(url).abort();
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} catch (err) { }
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this.__abortControllers.delete(url);
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}
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}
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};
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};
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