parse authorization headers in ruby

You can parse authorization headers in Ruby by first obtaining the header value from the HTTP request, and then using a regular expression or a convenient library to extract the desired information from the header.

Here's an example of how to extract the authorization header value from a HTTP request using the Sinatra web framework:

main.rb
require 'sinatra'

get '/' do
  authorization_header = env['HTTP_AUTHORIZATION']
  # parsing logic here
end
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To extract the authentication token from a basic authorization header (which contains a base64-encoded username and password), you can use the built-in Base64 library and split the decoded string:

main.rb
require 'base64'

authorization_header = env['HTTP_AUTHORIZATION']
encoded_token = authorization_header.split(' ').last
decoded_token = Base64.decode64(encoded_token)
username, password = decoded_token.split(':')
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To extract the token from a bearer authorization header (which contains a token string), you can use a regular expression:

main.rb
authorization_header = env['HTTP_AUTHORIZATION']
token = authorization_header.match(/Bearer (.*)/)[1]
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You can also use a library like rack-authentication or warden to handle authentication and authorization in your Ruby application.