web-workers in Rails projects

Question

I try to use web workers to be able to run several javascript codes at the same time. To start the worker I put the following into my javascript code section:

var worker = new Worker("my_task.js");
worker.onmessage = function(e) {
    console.log('Worker said: ', e.data);
};
worker.postMessage("test"); 

my_task.js is the same folder as the file that holds the code above. This is how my_task.js looks like:

self.addEventListener('message', function(e) {
  self.postMessage(e.data);
}, false);

But there seems to be a problem with Ruby on Rails (version 3.2.1):

Started GET "/users/my_task.js" for 127.0.0.1 at ...
...
...
ActiveRecord::RecordNotFound (Couldn't find User with id=my_task)

As you can see Rails tries to send an http get request when the script is started.
How can I solve this problem? Is there a better way to use web workers in Rails projects?

Thanks

Answer 1

• Put my_task.js in /public/javascripts
• In your javascript code where the worker is created, use the following ERB: var worker = new Worker("<%= javascript_path "my_task.js" %>");
• Add .erb to the extension of whatever file the above javascript code is found in. So if it's mypage.js, it becomes mypage.js.erb.

The above works for me on Rails 4.2.0, ruby 2.0.0p598