Class: Rack::Mount::Prefix

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/mount/prefix.rb

Overview

:nodoc:

Constant Summary collapse

EMPTY_STRING = 
''.freeze
PATH_INFO = 
'PATH_INFO'.freeze
SCRIPT_NAME = 
'SCRIPT_NAME'.freeze
SLASH = 
'/'.freeze
KEY = 
'rack.mount.prefix'.freeze

Instance Method Summary collapse

Constructor Details

#initialize(app, prefix = nil) ⇒ Prefix

Returns a new instance of Prefix.



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# File 'lib/rack/mount/prefix.rb', line 12

def initialize(app, prefix = nil)
  @app, @prefix = app, prefix.freeze
  freeze
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rack/mount/prefix.rb', line 17

def call(env)
  if prefix = env[KEY] || @prefix
    old_path_info = env[PATH_INFO].dup
    old_script_name = env[SCRIPT_NAME].dup

    begin
      env[PATH_INFO] = env[PATH_INFO].sub(prefix, EMPTY_STRING)
      env[PATH_INFO] = EMPTY_STRING if env[PATH_INFO] == SLASH
      env[SCRIPT_NAME] = Utils.normalize_path(env[SCRIPT_NAME].to_s + prefix)
      @app.call(env)
    ensure
      env[PATH_INFO] = old_path_info
      env[SCRIPT_NAME] = old_script_name
    end
  else
    @app.call(env)
  end
end