在Rails中，如何在不发出HTTP请求的情况下获取页面的内容？

Question

This may be really obvious, but in rails how can I get the contents of a page without making an HTTP request?

ie I want to grab the contents of any page that my rails app generates, in a script on the same server. This is of course trivial with an HTTP request, but how can I get the contents of a page otherwise?

This is what I am doing now which works fine:

require 'open-uri'

contents = open("http://localhost/path_to_my_page").read # but I really want to get rid of the overhead of the HTTP request

I need to be able to do this from a script, within the rails app, not a controller (eg with render_to_string)

Answer 1

This is how you get the contents of a page in the console. It might work for you:

require 'action_controller/integration'
app = ActionController::Integration::Session.new;
app.get('/path_to_your_page')
puts app.response.body

Answer 2

In your controller , you can call render_to_string instead of render and the page is returned instead of being send to the browser.
The arguments of both methods are the same, so you need to specify which controller and action you require to render.

Answer 3

Why not use erb directly? See this question for more details