How to trigger download with Rails send_data from AJAX post

Question

I\'m trying to use send_data to return a PNG image as the response for a ajax post request. How do I get the browser to trigger a download on the success callba

Answer 1

create a function in controller

def ajax_download
  send_file "path_to_file/" + params[:file]
end

and then in controller action

respond_to do |format|
  @java_url = "/home/ajax_download?file=#{file_name}"
  format.js {render :partial => "downloadFile"}
end

and make a partial in view folder name with _downloadFile.js.erb and write this line

window.location.href = "<%=@java_url %>"