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# Copyright (c) 2016 DeNA Co., Ltd., Ichito Nagata
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
#
require File.expand_path(File.dirname(__FILE__)) + "/bootstrap.rb"
module H2O
module ACL
def acl(&block)
context = H2O::ConfigurationContext.instance
if context.get_value(:acl_handler) then
raise "acl can be called only once for each handler configuration"
end
acl_handler = ACLHandler.new(&block)
context.set_value(:acl_handler, acl_handler)
context.add_post_handler_generation_hook(proc {|handler|
if handler != acl_handler
raise "acl configuration is ignored"
end
})
return acl_handler
end
class ACLHandler
class ConditionalHandler
def initialize(handler, cond)
@handler = handler
@cond = cond
end
def satisfy?(env)
return @cond.nil? || MatchingBlock.new(env).instance_eval(&@cond)
end
def call(env)
return @handler.call(env) if satisfy?(env)
return [399, {}, []]
end
end
def initialize(&block)
@acl = []
instance_eval(&block)
end
def call(env)
@acl.each {|ac|
return ac.call(env) if ac.satisfy?(env)
}
return [399, {}, []]
end
def use(handler, &cond)
ch = ConditionalHandler.new(handler, cond)
@acl << ch
end
def respond(status, header={}, body=[], &cond)
use(proc {|env| [status, header, body] }, &cond)
end
def deny(&cond)
respond(403, {}, ["Forbidden"], &cond)
end
def allow(&cond)
respond(399, {}, [], &cond)
end
def redirect(location, status=302, &cond)
respond(status, { "Location" => location }, [], &cond)
end
class MatchingBlock
def initialize(env)
@env = env
end
def addr(forwarded=true)
addr = @env['REMOTE_ADDR']
if forwarded && (xff = @env['HTTP_X_FORWARDED_FOR'])
xaddr = xff.split(",")[0]
addr = xaddr if xaddr
end
return addr || ""
end
def path
return @env["PATH_INFO"] || ""
end
def method
return @env["REQUEST_METHOD"] || ""
end
def header(name)
name = 'HTTP_' + name.gsub(/-/, '_').upcase;
return @env[name] || ""
end
def user_agent
return header("User-Agent") || ""
end
end
end
end
end
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