How to remove Set-Cookie header from response in rails 3? - ruby-on-rails

I have some actions that respond with static content. I also need them cached on client.
Similar question was asked in the past for rails 2
Is it possible to omit set-cookie header from the response in Rails 2.3?

Use the built in option.
env['rack.session.options'][:skip] = true
or
request.session_options[:skip] = true
or in older versions use this
env['rack.session.options'][:defer] = true
or
request.session_options[:defer] = true
You can find the documentation for it here http://rack.rubyforge.org/doc/Rack/Session/Abstract/ID.html

Try this: Remove charset from Rails content type or http://guides.rubyonrails.org/action_controller_overview.html#setting-custom-headers
Hope this would help.

Related

How do you add a custom HTTP response header in Rails?

I'm looking to add custom HTTP response headers to a Ruby on Rails app that is currently hosted on Heroku.
Use:
response.headers['HEADER NAME'] = 'HEADER VALUE'
either in a specific method or to a before_filter method of your application controller depending on whether you need this to be added in a specific or to all of your responses.
UPDATE for Rails 5 - February 24th, 2018
As noted by #BrentMatzelle in the comments, for Rails 5:
response.set_header('HEADER NAME', 'HEADER VALUE')
In rails 5, the following solution works (in action methods)
response.set_header("Header-Name", "Header value")
Reference: edgeapi
In Rails 3 or above, simply
headers['Header-Name'] = 'header value'
works in controllers. This is even the recommended way; according to the documentation,
Response is mostly a Ruby on Rails framework implementation detail, and should never be used directly in controllers. Controllers should use the methods defined in ActionController::Base instead. For example, if you want to set the HTTP response’s content MIME type, then use ActionController::Base#headers instead of Response#headers.
And this is still true in Rails 7.0.
In rails 4, set the response headers in the application.rb or respective environment files. Once you done that, you can override the header value wherever you required in the controller. Refer this url for more details.
In rails 4 works following:
class API::V1::BaseController
after_action :set_version_header
protected
def set_version_header
response.headers['X-ComanyName-Api-Version'] = 'V1'
end
end
If your headers are static, e.g. your own custom Server header, you can simply update config.action_dispatch.default_headers. The following example sets a custom Server header; add it to your config/application.rb or config/environments/...:
config.action_dispatch.default_headers["Server"] = "MyServer/#{config.version}"
(Assuming you set config.version earlier)
For more, see Rails Guides: Configuring Rails Applications: Configuring Action Dispatch:
config.action_dispatch.default_headers is a hash with HTTP headers that are set by default in each response.
This will be less work each request than running a controller callback.
NB: For more than one header use merge! to not remove existing essential XSS etc headers.

Any Gem that helps to get the http status of the specified URL in Rails

There are number of URLs that I want to test and want to know the HTTP status of each of these URLs without hitting them in browser.
does anyone has idea about the gem, which can help me to find the solution?
How about standard Ruby, no extra gems (just require 'net/http'):
Net::HTTP.new('google.com').head('/').code
#=> "301"
If for some reason you want to do more than a head request, replace head with get.
I'm pretty sure you could achieve this with standard ruby (Net::HTTP and friends). However there are many gems to handle stuff like that. I have a bias towards Typhoeus.
Example :
Typhoeus::Request.get('http://google.fr').code
=> 301
use HTTParty:
uri = "http://url.to.inspect"
request = HTTParty.get( uri )
return true if request.code.to_i == 200

Ruby on Rails Directory Path

I need to print Ruby on Rails complete url in my application. in details
with RAILS_ROOT I m getting a url like this
D:/projects/rails_app/projectname/data/default.jpg
But for my application I need a path like this
http://localhost:3000/data/default.jpg
Please help me to solve this issue. I am using Rails 2
Thanks
Today we use URI. Simply require the library and you will be able to parse your current dynamic and static URI any way you please. For example I have a function that can read URI parameters like so...
#{RAILS_ROOT}/app/helpers/application_helper.rb (The literal path string of the file depicted below)
def read_uri(parameter)
require 'uri'
#raw_uri = URI.parse(request.original_fullpath)
#uri_params_raw = #raw_uri.query
if #uri_params_raw =~ /\=/
#uri_vars = #uri_params_raw.split('=')
return #uri_vars[parameter]
end
return false
end
This should split all URI parameters into an array that gives the requested (numeric) "parameter".
I believe that simply the URI.parse(request.original_fullpath) should work for you.
I come from using a minimum of rails 4.2.6 with this method so, I hope it works for anyone who might view this later on. Oh, and just as a disclaimer: I wasn't so wise to rails at the time of posting this.

Remove charset from Rails content type

I have a old-stupid service making request to my app that fails when the Content-Type include the charset line
Content-Type text/html; charset=utf-8
and I don't know how to remove it from my rails response. Every time that I override the headers forcing just the first part (Content-Type text/html) Rails adds the charset to the header...
For Rails 3/4, the code that handles this is in ActionDispatch::Response.assign_default_content_type_and_charset! in actionpack/lib/action_dispatch/http/response.rb.
Setting response.headers['Content-Type'] instead of response.content_type should eliminate the charset. Chubas' solution does this for all responses.
For Rails 2, the code that handles this is in content_type= and charset= in actionpack/lib/action_controller/response.rb.
As Carson's solution describes, setting ActionController::Base.default_charset = nil should eliminate the charset.
This worked for me:
class MyController
after_filter :remove_charset
def remove_charset
headers['Content-type'] = "text/html"
end
end
If you're working on development, make sure you clear your browser's cache.
There is this method, but didn't work for me. I don't know why, it may even be a bug.
The only way I was able to get it to work is by setting the default charset
ActionController::Base.default_charset = nil
Also, setting the Content-Transfer-Encoding header to binary will turn off the charset.
Putting this in the controller did it for me:
ActionDispatch::Response::default_charset = nil
I put in in my base controller to remove it from all responses.

Rails 4 : What is cached when using config.cache_classes = true

I was just wondering and didn't find explicit response on what in the model class (ActiveRecord) is cached when setting config.cache_classes to true ?
Could someone tell me or point me to the doc I didn't found ?
Thanks
It determines whether or not your application classes are reloaded on each request. If it's true, you have to restart your server for code changes to take effect (i.e. you set it to true in production, false in development.)
Documentation is here.
What is cached when using config.cache_classes = true
It responsible for two thing in rails 4
1. It prevent class reloading between requests.
2. It ensure Rack::Lock in not included in middleware stack, so
that your thread don't get locked.

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