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use methods on the request object to implement `fetch`

Now the Headers internals don't depend on the env hash.
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tenderlove committed Aug 21, 2015
1 parent c0c7268 commit bce4ff70dd1ab88e5b573ad8c88408f100cf219e
Showing with 8 additions and 2 deletions.
  1. +8 −2 actionpack/lib/action_dispatch/http/headers.rb
@@ -54,15 +54,21 @@ def key?(key)
alias :include? :key?
DEFAULT = # :nodoc:
# Returns the value for the given key mapped to @env.
# If the key is not found and an optional code block is not provided,
# raises a <tt>KeyError</tt> exception.
# If the code block is provided, then it will be run and
# its result returned.
def fetch(key, *args, &block)
env.fetch env_name(key), *args, &block
def fetch(key, default = DEFAULT)
@req.get_header(env_name(key)) do
return default unless default == DEFAULT
return yield if block_given?
raise NameError, key
def each(&block)

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