Reading Header Data in Ruby on Rails

Question

I am making an API where header data will be sent in a Facebook access token.

How can I read this data from the header?

Answer 1

request.headers["Content-Type"] # => "text/plain" 

replace "Content-Type" with the name of the header you want to read.

Update for Rails 4.2

There are two ways to get them in Rails 4.2: The old way (still working):

 request.headers["Cookie"] 

New way:

 request.headers["HTTP_COOKIE"] 

Get a hash with all request headers.

 request.headers 

Answer 2

Rails now attaches HTTP_ to the header and also converts it to all caps, so now it will:

 request.headers["HTTP_CONTENT_TYPE"] 

Answer 3

To get the hash of the actual http headers, use @_headers in the controller.