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function deferWebTraffic(promiseToWaitFor, next) {
debug("deferWebTraffic on %o", promiseToWaitFor);
let seenTabs = new Set();
function checkNavigation(nav) {
if (nav.tabId !== browser.tabs.TAB_ID_NONE && nav.url.startsWith("http")) {
let seen = seenTabs.has(nav.tabId);
debug(`%s navigation %o`, seen ? "seen" : "unseen", nav);
if (!seen) {
reloadTab(nav.tabId);
}
}
}
browser.webNavigation.onCommitted.addListener(checkNavigation);
function reloadTab(tabId) {
seenTabs.add(tabId);
try {
browser.tabs.executeScript(tabId, {
runAt: "document_start",
code: "if (performance.now() < 60000) window.location.reload(false)"
});
debug("Reloading tab", tabId);
} catch (e) {
error(e, "Can't reload tab", tabId);
}
}
async function waitFor(request) {
let {type, documentUrl, url, tabId, frameId} = request;
if (tabId === browser.tabs.TAB_ID_NONE) return;
if (!seenTabs.has(tabId)) {
if (type === "main_frame") {
seenTabs.add(tabId);
} else if (documentUrl) {
if (frameId !== 0 && request.frameAncestors) {
documentUrl = request.frameAncestors.pop().url;
}
reloadTab(tabId);
}
}
debug("Deferring %s %s from %s", type, url, documentUrl);
try {
await promiseToWaitFor;
} catch (e) {
error(e);
}
debug("Green light to %s %s from %s", type, url, documentUrl);
}
function spyTabs(request) {
debug("Spying request %o", request);
}
browser.webRequest.onHeadersReceived.addListener(spyTabs, {
urls: ["<all_urls>"],
types: ["main_frame"],
}, ["blocking", "responseHeaders"]);
browser.webRequest.onBeforeRequest.addListener(waitFor, {
urls: ["<all_urls>"]
}, ["blocking"]);
(async () => {
await promiseToWaitFor;
browser.webNavigation.onCommitted.removeListener(checkNavigation);
browser.webRequest.onBeforeRequest.removeListener(waitFor);
browser.webRequest.onHeadersReceived.removeListener(spyTabs);
if (next) next();
})();
}
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