Symfony Howto: Export tabular data to a csv file?

I have a mymodule/myaction that outputs csv (i.e. tabular data separated by ;). If I want to point to it and have my users open it with Excel as a spreadsheet, I need to do a few things:

• Add a special routing rule for mymodule/myaction which specifies a custom suffix.

  export_excel:
    url:    /export.csv
    param:  {module: mymodule, action: myaction}
  

• If Apache's mod_rewrite is being used, add a new rule to the .htaccess file to ignore .csv files.

  RewriteCond %{REQUEST_URI} !\.csv$
  

• Declare the mymodule/myaction view with a special content-type in the view.yml file.

  myactionSuccess:
    has_layout: off
    http_metas:
      content-type: application/msexcel