Rails3 xhr response served as text/html instead of text/javascript

Question

I just upgraded an application from Rails 2.3 to Rails 3.0. This application make extensive use of Ajax.

Since the upgrade, each

respond_to do |format|
  format.js
end

Responds with a content type of text/html instead of text/javascript (as viewed in Firebug). The XHR request specifies Accept="text/javascript". The result is that Prototype refuse to eval the response, so no more magic on my pages…

For precision, I decided to include the legacy RailsPrototypeHelpers, the full UJS app will be the next application.

For information, I tried to put the js in js.rjs files: content-type is still 'text/html' I tried to inline js and force with render :update, :content_type => 'text/javascript': no luck, still answer with 'text/html' content_type.

Any suggestion is welcome.

Thank you.

Same happening here, but weirder. Chrome and Safari are ok. On Firefox, however, content type is set to text/javascript on first post request, but text/html on the second one, which gives me a 406. Using Rails 3.2.3 — rapcal
– rapcal, Commented Apr 17, 2012 at 5:15
This issue still exists although it doesn't seem to be affecting everyone: github.com/rails/rails/issues/14173. — Steve
– Steve, Commented May 27, 2015 at 4:34

keithepley · Accepted Answer · 2012-01-31 19:10:51Z

2

I've been having a similar problem. I found that I could get it to return text/javascript if I added this:

headers["Content-Type"] = "text/javascript; charset=utf-8"
render :update do |page|
    ...
end

or

respond_to do |format|
    format.js {headers["Content-Type"] = "text/javascript; charset=utf-8"}
end

answered Jan 31, 2012 at 19:10

keithepley

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