Why doesn't this work in a controller, or in a file in a module in /lib:
require 'cgi' cgi = CGI.new test = cgi.cookies["mycookie"][0]
cgi.cookies doesn't get the cookie.
But this cgi script does:
require 'cgi' cgi = CGI.new('html4') cookie_name = 'mycookie' val_string = cgi.cookies[cookie_name][0] cgi.out { cgi.html { cgi.head { cgi.title {"Cookies"} } + cgi.body { cgi.p {"name: #{cookie_name}" } + cgi.p {"value: #{val_string}"} } } }
Why doesn't this work in a controller, or in a file in a module in /lib:
require 'cgi' cgi = CGI.new test = cgi.cookies["mycookie"][0]
Rails doesn't use CGI anymore as the interface between it and the outside world (it uses rack instead) which probably broke that.
Controllers have an instance method called cookies which returns a hash like object containing your cookies.
Fred
Frederick Cheung wrote: s doesn't use CGI anymore as the interface between it and the
outside world (it uses rack instead) which probably broke that.
Controllers have an instance method called cookies which returns a hash like object containing your cookies.
Fred
I see. Strange that it works on my machine locally.
I regularly use rails cookie instance in my rails app. But I can't use it in a module in a file in /app/lib, right? That's why I used cgi.
The thing is, before save and show I encrypt certain fields in the database using the gem fast_aes, and the key is in a cookie. In each model I use before_save and after_find. How can I get the value of that cookie without using cgi?
Frederick Cheung wrote:
uses rack
How do I read a cookie with rack? Trying to find the answer through Google but witout luck.
This should help:
http://github.com/dewind/rack-cookie-monster/blob/master/lib/rack/cookie_monster.rb
Best regards
Peter De Berdt
Peter De Berdt wrote:
What do you mean? The environment is passed in with the required call method from the rack middleware.
Best regards
Peter De Berdt
Peter De Berdt wrote:
What do you mean? The environment is passed in with the required call method from the rack middleware.
I don't know. I just want to get a cookie value in a script in a file in railsapp/lib. I thought this would do it:
req = Rack::Request.new(env) req.cookies()
But I get "undefined local variable or method `env'"
Well, to get started with middlewares, it’s a good thing to read up on how Rails is using it:
http://guides.rails.info/rails_on_rack.html
In your case, something like this would probably do the trick:
That’s the basic structure. How you handle those cookies and what you want to do with it will determine how you pass it on into the Rails app. Google should be able to help you out there, since there’s lots of middlewares out there that will do something similar to what you want to do.
Best regards
Peter De Berdt
Peter De Berdt wrote:
I would just like to get the value of a particular cookie in a file in /lib. Is there any other way without rack?
Why are you overcomplicating things so much? Cookies are part of the request/response cycle and have nothing to do with models (MVC remember, separation of logic). If you want to pass controller data into a model or a custom class, you pass it as a parameter. In case of your /lib file (which is a custom class I presume):
class FooBar
def initialize(mycookievariable)
end
def somemethod
end
end
and in your controller:
def show
my_foo_bar = FooBar.new(cookies[:mycookievariable)
end
Best regards
Peter De Berdt
Peter De Berdt wrote:
Why are you overcomplicating things so much?
Good question. 
It's so much easier when you have a "programmers"
brain. I don't.
Thanks for your suggestion. But how do I get the value of a cookie in the model?
You pass it as a parameter to the model method, just like I passed it into a custom class.
class FooBar < ActiveRecord::Base
def some_method(cookievalue)
end
end
FooBar.some_method(cookies[:myvalue])
Best regards
Peter De Berdt
… or if you just want to make it a field value:
def create
MyModel.create(params[:my_model].merge(:some_field => cookies[:some_cookie]))
end
No need to juggle around and just mass-assign using a hash, like demonstrated above.
Best regards
Peter De Berdt
Pål Bergström wrote:
req = Rack::Request.new(env) req.cookies()
I still have problem. I just want to read a damn cookie. Why doesn't this work?
Pål Bergström wrote:
I still have problem. I just want to read a damn cookie. Why doesn't this work?
def create @user = User.new(params[:user]) cookies[:user_name] = "david" .... .... end
Sets a :user_name cookie with value "david" upon creating a user
def index @users = User.all @cookie_count = cookies.size @user_name_cookie = cookies[:user_name] if @cookie_count > 0 .... .... end
Reads the :user_name cookie when listing users.
<p>There are <%= @cookie_count %> cookies in request.</p> <p>The :user_name cookie value is: <%= @user_name_cookie %></p>
Show the number of cookies and the value of the :user_name cookie ("david").
Note: This is a useless contrived example showing use of the "cookies" method, but notice once you have the cookie value you can do whatever you want with it, including passing it into a model.
Robert Walker wrote:
def create @user = User.new(params[:user]) cookies[:user_name] = "david" .... .... end
Sets a :user_name cookie with value "david" upon creating a user
def index @users = User.all @cookie_count = cookies.size @user_name_cookie = cookies[:user_name] if @cookie_count > 0 .... .... end
Reads the :user_name cookie when listing users.
<p>There are <%= @cookie_count %> cookies in request.</p> <p>The :user_name cookie value is: <%= @user_name_cookie %></p>
Show the number of cookies and the value of the :user_name cookie ("david").
I don't want to set a cookie. That's never been a problem. I would like to read a cookie and get the value into models so I can access it when using a before_save.
Pål Bergström wrote:
def index @users = User.all @cookie_count = cookies.size @user_name_cookie = cookies[:user_name] if @cookie_count > 0 .... .... end
I don't want to set a cookie. That's never been a problem. I would like to read a cookie and get the value into models so I can access it when using a before_save.
I though I had made that clear. You read the cookie value as shown in above index method of the controller then you pass that value to the model object.
If you don't know how to pass a variable to a method, then I'd suggest learning something about Ruby before you try to write a Rails application. I don't know how to make this any more clear.
Robert Walker wrote:
Pål Bergström wrote:
I though I had made that clear. You read the cookie value as shown in above index method of the controller then you pass that value to the model object.
If you don't know how to pass a variable to a method, then I'd suggest learning something about Ruby before you try to write a Rails application. I don't know how to make this any more clear.
Sorry but I don't understand you. And I have a feeling you don't understand me.
Let me ask you this instead; is there a way to get the value of a cookie in a model?