diff options
Diffstat (limited to 'actionpack/lib/action_dispatch/http')
| -rw-r--r-- | actionpack/lib/action_dispatch/http/headers.rb | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/actionpack/lib/action_dispatch/http/headers.rb b/actionpack/lib/action_dispatch/http/headers.rb index 788eed8b89..3e607bbde1 100644 --- a/actionpack/lib/action_dispatch/http/headers.rb +++ b/actionpack/lib/action_dispatch/http/headers.rb @@ -1,5 +1,10 @@ module ActionDispatch module Http + # Provides access to the request's HTTP headers from the environment. + # + # env = { "CONTENT_TYPE" => "text/plain" } + # headers = ActionDispatch::Http::Headers.new(env) + # headers["Content-Type"] # => "text/plain" class Headers CGI_VARIABLES = %w( CONTENT_TYPE CONTENT_LENGTH @@ -14,14 +19,16 @@ module ActionDispatch include Enumerable attr_reader :env - def initialize(env = {}) + def initialize(env = {}) # :nodoc: @env = env end + # Returns the value for the given key mapped to @env. def [](key) @env[env_name(key)] end + # Sets the given value for the key mapped to @env. def []=(key, value) @env[env_name(key)] = value end @@ -31,6 +38,13 @@ module ActionDispatch end alias :include? :key? + # 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 end @@ -39,12 +53,17 @@ module ActionDispatch @env.each(&block) end + # Returns a new Http::Headers instance containing the contents of + # <tt>headers_or_env</tt> and the original instance. def merge(headers_or_env) headers = Http::Headers.new(env.dup) headers.merge!(headers_or_env) headers end + # Adds the contents of <tt>headers_or_env</tt> to original instance + # entries; duplicate keys are overwritten with the values from + # <tt>headers_or_env</tt>. def merge!(headers_or_env) headers_or_env.each do |key, value| self[env_name(key)] = value @@ -52,6 +71,8 @@ module ActionDispatch end private + # Converts a HTTP header name to an environment variable name if it is + # not contained within the headers hash. def env_name(key) key = key.to_s if key =~ HTTP_HEADER |