问题
I am making an API where in the access token for Facebook login will be sent in through header data.
How do I read this data from the header?
回答1:
request.headers["Content-Type"] # => "text/plain"
replace "Content-Type" with the name of the header that you want to read.
Update for Rails 4.2
There are 2 ways to get them in Rails 4.2: Old way (still working):
request.headers["Cookie"]
New way:
request.headers["HTTP_COOKIE"]
To get a Hash with all headers of the request.
request.headers
回答2:
Rails now attaches HTTP_ to the header as well as converting it to all caps so it would now be:
request.headers["HTTP_CONTENT_TYPE"]
回答3:
To get hash of actual http headers use @_headers in controller.
来源：https://stackoverflow.com/questions/14729795/reading-header-data-in-ruby-on-rails