Find out how to Detect Failed Requests through Net Extensions

The most effective issues that ever occurred to t he person expertise of the online has been internet extensions. Browsers are highly effective however extensions convey a brand new stage of performance. Whether or not it is crypto wallets, media gamers, or different standard plugins, internet extensions have develop into important to on daily basis duties.

Engaged on MetaMask, I’m thrust right into a world of constructing every thing Ethereum-centric work. A kind of functionalities is guaranteeing that .eth domains resolve to ENS when enter to the deal with bar. Requests to https://vitalik.ethnaturally fail, since .eth is not a natively supported prime stage area, so we have to intercept this errant request.

// Add an onErrorOccurred occasion through the browser.webRequest extension API
browser.webRequest.onErrorOccurred.addListener((particulars) => {
  const { tabId, url } = particulars;
  const { hostname } = new URL(url);

  if(hostname.endsWith('.eth')) {
    // Redirect to wherever I need the person to go
    browser.tabs.replace(tabId, { url: `https://app.ens.domains/${hostname}}` });
  }
},
{
  urls:[`*://*.eth/*`],
  varieties: ['main_frame'],
});

Net extensions present a browser.webRequest.onErrorOccurred technique that builders can plug into to hear for errant requests. This API does not catch 4** and 5** response errors. Within the case above, we search for .eth hostnames and redirect to ENS.

You possibly can make use of onErrorOccurred for any variety of causes, however detecting customized hostnames is a good one!