Iterates through header values, passing each value to the code block.
Returns an enumerator if no block is given.
As for each_header
, except the keys are provided in capitalized form.
Note that header names are capitalized systematically; capitalization may not match that used by the remote HTTP
server in its response.
Returns an enumerator if no block is given.
Returns a content type string such as “text”. This method returns nil if Content-Type: header field does not exist.
UNTESTED
Visit all subnodes of self
recursively
Adds a maker to the set of supported makers