Chrome Native Messaging using Executable Jar file

Question

I have created a Chrome extension with the nativeMessaging permission added to the manifest.

I am opening a port to the native messaging host.

The manifest for my native messaging host points to an executable jar file.

When I launch my extension, there are no errors, the connection seems fine, but the code in my jar file never seems to run. (For testing I show a new JFrame that is created in the main() method. When double-clicking the jar file it shows the JFrame. But when running the jar file via Chrome Native Messaging, the JFrame doesn't show up.

Is there something I am missing?

Answer 1

do you have uppercase letters in your mainfest name ? i had this issue+same symptoms and this fixed it for me (although i get a different error now)

{ "name": "com.google.chrome.example.echoUppercase", <- wont work ....

"name": "com.google.chrome.example.echouppercase", <- works }

Answer 2

I managed to get it to work by letting chrome start a bat file with the following content:

@echo off
java -jar your_file.jar %*

The echo off was a detail which took me some time to figure out.