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require 'nickserver/hkp/source'
require 'nickserver/couch_db/source'
module Nickserver
class RequestHandler
class Request
def initialize(params, headers)
@params = params || {}
@headers = headers
end
def email
param("address")
end
def fingerprint
param("fingerprint")
end
def domain
host_header = headers['Host']
raise MissingHostHeader if host_header.nil?
host_header.split(':')[0].strip.sub(/^nicknym\./, '')
end
protected
def param(key)
params[key] && params[key].first
end
attr_reader :params, :headers
end
def initialize(responder)
@responder = responder
end
def respond_to(params, headers)
request = Request.new params, headers
response = handle request
send_response response.status, response.content
end
protected
def handle(request)
handler = handler_for_request request
handler.call request
rescue RuntimeError => exc
puts "Error: #{exc}"
puts exc.backtrace
ErrorResponse.new(exc.to_s)
end
def handler_for_request(request)
if request.email
EmailHandler.new
elsif request.fingerprint
FingerprintHandler.new
else
Proc.new { Nickserver::Response.new(404, "Not Found\n") }
end
end
class EmailHandler
def call(request)
email = EmailAddress.new(request.email)
if email.invalid?
ErrorResponse.new("Not a valid address")
else
send_key(email, request)
end
end
protected
def send_key(email, request)
if local_address?(email, request)
source = Nickserver::CouchDB::Source.new
else
source = Nickserver::Hkp::Source.new
end
source.query(email)
rescue MissingHostHeader
ErrorResponse.new("HTTP request must include a Host header.")
end
#
# Return true if the user address is for a user of this service provider.
# e.g. if the provider is example.org, then alice@example.org returns true.
#
# If 'domain' is not configured, we rely on the Host header of the HTTP request.
#
def local_address?(email, request)
email.domain?(Config.domain || request.domain)
end
end
class FingerprintHandler
def call(request)
fingerprint = request.fingerprint
if fingerprint.length == 40 && !fingerprint[/\H/]
source = Nickserver::Hkp::Source.new
source.get_key_by_fingerprint(fingerprint)
else
ErrorResponse.new('Fingerprint invalid: ' + fingerprint)
end
end
end
class ErrorResponse < Nickserver::Response
def initialize(message)
@status = 500
@message = message + "\n"
end
end
def send_response(status = 200, content = '')
responder.respond status, content
end
attr_reader :responder
class MissingHostHeader < StandardError
end
end
end
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