CODEWITHSUNDEEP
javascriptlinuxgoogle-chromegoogle-chrome-extension
Sojo
Sojo

Reputation: 6193

Attempting to use a disconnected port in Chrome Native Messaging

I'm trying to create a Hello World app for Chrome Native Messaging. I've created a Chrome extension, a binary executable and html page. I'm on Linux and using Chromium.

I think I've registered everything properly, however, it still isn't working.

From my web page I send a message to my extension, and here's a part of code of my extention:

chrome.runtime.onMessage.addListener(function (msg, snd, sndResp) {    
  var prt = chrome.runtime.connectNative('com.example.my_app');
  prt.postMessage(msg); // Error in event handler for runtime.onMessage: Error: Attempting to use a disconnected port

Note that the "msg" isn't empty and has the same content in it as one that I put into it on the html page. So there's no issue about that.

However, in the extension the error is:

Error in event handler for runtime.onMessage: Error: Attempting to use a disconnected port

Upvotes: 2

Views: 2360

Answers (1)

Android Enthusiast
Android Enthusiast

Reputation: 4950

The error may caused when a connection get closed. It may failed because the tab is no longer active to receive the message.

Try to use runtime.connect or tabs.connect respectively. It allows you to distinguish between different types of connections.

When establishing a connection, each end is given a runtime.Port object which is used for sending and receiving messages through that connection.

Here is how you open a channel from a content script, and send and listen for messages:

var port = chrome.runtime.connect({name: "knockknock"});
port.postMessage({joke: "Knock knock"});
port.onMessage.addListener(function(msg) {
if (msg.question == "Who's there?")
port.postMessage({answer: "Madame"});
else if (msg.question == "Madame who?")
port.postMessage({answer: "Madame... Bovary"});
});

Upvotes: 1

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