Re: Using externally_connectable to Send Data from WWW to Chrome Extension

[Ben McCann]

Did you figure this out?  I'm having quite a bit of trouble as well.

On Thursday, August 22, 2013 3:25:37 AM UTC-7, eversonjw wrote:

I was provided this as a solution to send data/messages from WWW to a Chrome Extension (for storage in LocalStorage). However, it appears to not be working - any ideas/suggestions?

manifest.json

"externally_connectable": {
  "matches": ["*://*.example.com/*"]
}

content_script.js

chrome.runtime.sendMessage("your extension id will be here", 
                           {data: { anyDataKey : "example"}});

background.js

chrome.runtime.onMessageExternal.addListener(
  function(request, sender, sendResponse) {
    if (request.data)
      alert("Hi, there is message from the website");
      var data = request.data;
      // now the data is on your extension side, just save it to extension's localstorage.
  });

[Ben McCann]

If I inspect my background view then I see:

    Port: Could not establish connection. Receiving end does not exist. 

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[Ben McCann]

I figured out my problem. It's because I'm using sendMessage from an iframe. I started a new thread on that here:

https://groups.google.com/a/chromium.org/forum/#!topic/chromium-extensions/R_wj-r9OQP0

-Ben

On Sunday, September 8, 2013 12:25:56 PM UTC-7, eversonjw wrote:

No sorry, I abandoned this in favour of on-domain localStorage and a custom API.

If you do ever manage to figure it out I'd be interested to see a code example.