Function tryFetch

nodeImage.js:328–371

(url, asJson, next)

            return '';
        }
        function tryFetch(url, asJson, next) {
            GM_xmlhttpRequest({
                method: 'GET',
                url: url,
                headers: {
                    Referer: refWww,
                    Accept: asJson ? 'application/json' : 'text/html,*/*',
                },
                timeout: 20000,
                anonymous: false,
                onload: function (r) {
                    var text = r.responseText || '';
                    if (asJson) {
                        var body;
                        try {
                            body = text ? JSON.parse(text) : null;
                        } catch (e) {
                            body = null;
                        }
                        var key = extractApiKeyFromJson(body);
                        if (key) {
                            onDone(key, '');
                            return;
                        }
                    } else {
                        var keyHtml = extractApiKeyFromHtml(text);
                        if (keyHtml) {
                            onDone(keyHtml, '');
                            return;
                        }
                    }
                    if (typeof next === 'function') next();
                    else onDone('', parseLastMsg(text, asJson));
                },
                onerror: function () {
                    if (typeof next === 'function') next();
                    else onDone('', '');
                },
                ontimeout: function () {
                    if (typeof next === 'function') next();
                    else onDone('', '');
                },
            });
        }
        tryFetch(WWW_BASE + '/api/user/api-key', true, function () {
            tryFetch(API_BASE + '/api/user/api-key', true, function () {
                tryFetch(refWww, false, null);