ruby on rails - How do I preserve case with http.get?

Question

I have a requirement to send an HTTP header in a specific character-case. I am aware that this is against the RFC, but I have a requirement.

http.get seems to change the case of the headers dictionary I supply it. How can I preserve the character-case?

Answer 1

Based on the Tin Man's answer that the Net::HTTP library is calling #downcase on your custom header key (and all header keys), here are some additional options that don't monkey-patch the whole of Net::HTTP.

You could try this:

custom_header_key = "X-miXEd-cASe"
def custom_header_key.downcase
  self
end

To avoid clearing the method cache, either store the result of the above in a class-level constant:

custom_header_key = "X-miXEd-cASe"
def custom_header_key.downcase
  self
end
CUSTOM_HEADER_KEY = custom_header_key

or subclass String to override that particular behavior:

class StringWithIdentityDowncase < String
  def downcase
    self
  end
end

custom_header_key = StringWithIdentityDowncase.new("X-miXEd-cASe")