ismitmlink/bg.js

const apiurl = 'https://searxes.danwin1210.me/collab/open/ismitm.php';
let mymemory = {};

function ismitm(f) {
	return new Promise((g, b) => {
		fetch(apiurl, {
			method: 'POST',
			mode: 'cors',
			headers: {
				'Content-Type': 'application/x-www-form-urlencoded'
			},
			body: 'f=' + f
		}).then(function (r) {
			return r.json();
		}).then(function (r) {
			if (r[0]) {
				g(r[1]);
			} else {
				b();
			}
		}).catch(b);
	});
}

browser.runtime.onMessage.addListener((request, sender, sendResponse) => {
	if (mymemory[request] != undefined) {
		let rlt = mymemory[request];
		if (Object.keys(mymemory).length > 300) {
			let cnt = 1;
			for (let t in mymemory) {
				if (cnt > 10) {
					break;
				}
				mymemory[t] = null;
				delete mymemory[t];
				cnt++;
			}
		}
		browser.tabs.sendMessage(sender.tab.id, [request, rlt]);
	} else {
		ismitm(request).then(function (a) {
			mymemory[request] = a;
			browser.tabs.sendMessage(sender.tab.id, [request, a]);
		}, function () {
			browser.tabs.sendMessage(sender.tab.id, [request, false]);
		});
	}
});