Modify url location in chrome extensions & stop the initial request

I've made an extension who's purpose is to redirect urls. I.e: www.google.com becomes: www.mysite.com/?url=www.google.com

I came across this post: How to modify current url location in chrome via extensions

The problem I'm having is that the url's are both processed. The tab initially loads up google.com and only after it's finished开发者_运维百科 my request is shown ( www.mysite.com/?url=www.google.com). Is there any way to stop the initial request from being processed?

Something like:

   chrome.tabs.onUpdated.addListener(function(tabId,obj,tab){
    update.stop() // ??????????? Here I'm missing...
    chrome.tabs.update(tabId,{url:....}, function callback); // My update stuff..
   });

Thoughts?

thank you all.

You're looking for the webNavigation API.

You can register listeners to handle user navigation by modifying or blocking the request on the fly.

In the example below, when a user navigate to www.google.com, before the page even start loading onBeforeNavigate is fired and you can redirect the user to the CSS validation page for that URL:

chrome.webNavigation.onBeforeNavigate.addListener((details) => {
    if(details.url.indexOf("www.google.com") !== -1)) {
        chrome.tabs.update(details.tabId, {
            url: "https://jigsaw.w3.org/css-validator/validator?uri=" + details.url
        });
    }
});

Remember to add the "webNavigation" permission to your extension manifest to get this functionality enabled.

chrome.tabs.onUpdated is fired two times per tab load - once a tab starts loading, and another time when it finishes loading. If you attach your update to the tab start loading event then it should work relatively quickly. You will still see original url being loaded for a brief moment, but it won't wait until it finishes, as you are describing.

chrome.tabs.onUpdated.addListener(function(tabId,obj,tab){
    if(obj.status == "loading") {
        chrome.tabs.update(tabId,{url:....}, function callback); 
    }
});

I don't think there is a more efficient solution at the moment.