how to access IndexedDB (of current opened domain/tab) from chrome extension

Question

I currently have indexedDB on google.com domain. i want to be able to read it from google chrome extension. how can i accomplish this? do i need to add any specific permissi

Answer 1

For anyone still interested, my solution to this problem -

this is placed in content script of extension -

 chrome.extension.onConnect.addListener(function(port) {
 if(port.name == "extension_request" ) {
  port.onMessage.addListener(function(msg) {
    if (msg.db) {
      window.indexedDB.webkitGetDatabaseNames().onsuccess = function(sender,args)
      {
        var r = sender.target.result;
        if(r.contains(msg.db)){
            var openRequest = indexedDB.open(msg.db);
            // your code
            port.postMessage({foo: bar}); // your result which you want to send        
        }
       }
    }
 }
}

and this is for background or popup script -

 chrome.tabs.query({active: true, currentWindow: true}, function(tabs) {
        var port = chrome.tabs.connect(tabs[0].id,{name: "extension_request"});
            port.postMessage({db: "database_name_example"}); // send database name
            port.onMessage.addListener(function(msg) {
              if (msg.foo ) {
               // do your stuff in extension
              }
           }
}