Port error: Could not establish connection. Receiving end does not exist. In Chromiume

Question

I\'m developing an extension in Chrome, and there\'s a problem. In my inject.js, I make a request like:

chrome.extension.sendRequest({command:         


        

Answer 1

An HTML background page didn't work for me in Chrome 20.0.1132.57 m on Windows 7 with the same error:

Port error: Could not establish connection. Receiving end does not exist. miscellaneous_bindings:232

I tried using a background.js script with the following content:

chrome.extension.onConnect.addListener(function(port) {
    port.onMessage.addListener(function(msg) {
        // May be empty.
    });
});

That solved the immediate onDisconnect in my content script:

port = chrome.extension.connect();
port.onDisconnect.addListener(function (event) {
    // Happened immediately before adding the proper backend setup.
    // With proper backend setup, allows to determine the extension being disabled or unloaded.
});

The correct code came from Chromium Extensions messaging example: http://src.chromium.org/viewvc/chrome/trunk/src/chrome/common/extensions/docs/examples/api/messaging/timer/page.js?view=markup

The example also contains the second part that serves as a backend for sendRequest, but I haven't tested it myself:

chrome.extension.onRequest.addListener(
    function(request, sender, sendResponse) {
        // Don't know if it may be empty or a sendResponse call is required.
    });