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|
# frozen_string_literal: true
module HTTPX
module Plugins
module Proxy
module HTTP
class << self
def extra_options(options)
options.merge(supported_proxy_protocols: options.supported_proxy_protocols + %w[http])
end
end
module InstanceMethods
def with_proxy_basic_auth(opts)
with(proxy: opts.merge(scheme: "basic"))
end
def with_proxy_digest_auth(opts)
with(proxy: opts.merge(scheme: "digest"))
end
def with_proxy_ntlm_auth(opts)
with(proxy: opts.merge(scheme: "ntlm"))
end
def fetch_response(request, selector, options)
response = super
if response &&
response.is_a?(Response) &&
response.status == 407 &&
!request.headers.key?("proxy-authorization") &&
response.headers.key?("proxy-authenticate") && options.proxy.can_authenticate?(response.headers["proxy-authenticate"])
request.transition(:idle)
request.headers["proxy-authorization"] =
options.proxy.authenticate(request, response.headers["proxy-authenticate"])
send_request(request, selector, options)
return
end
response
end
end
module ConnectionMethods
def force_close(*)
if @state == :connecting
# proxy connect related requests should not be reenqueed
@parser.reset!
@inflight -= @parser.pending.size
@parser.pending.clear
end
super
end
private
def handle_transition(nextstate)
return super unless @options.proxy && @options.proxy.uri.scheme == "http"
case nextstate
when :connecting
return unless @state == :idle
@io.connect
return unless @io.connected?
@parser || begin
@parser = parser_type(@io.protocol).new(@write_buffer, @options.merge(max_concurrent_requests: 1))
parser = @parser
parser.extend(ProxyParser)
parser.on(:response, &method(:__http_on_connect))
parser.on(:close) do
next unless @parser
reset
disconnect
end
parser.on(:reset) do
if parser.empty?
reset
else
enqueue_pending_requests_from_parser(parser)
initial_state = @state
reset
if @pending.empty?
@parser = nil
next
end
# keep parser state around due to proxy auth protocol;
# intermediate authenticated request is already inside
# the parser
parser = nil
if initial_state == :connecting
parser = @parser
@parser.reset
end
idling
@parser = parser
transition(:connecting)
end
end
__http_proxy_connect(parser)
end
return if @state == :connected
when :connected
return unless @state == :idle || @state == :connecting
case @state
when :connecting
parser = @parser
@parser = nil
parser.close
when :idle
@parser.callbacks.clear
set_parser_callbacks(@parser)
end
end
super
end
def __http_proxy_connect(parser)
req = @pending.first
if req && req.uri.scheme == "https"
# if the first request after CONNECT is to an https address, it is assumed that
# all requests in the queue are not only ALL HTTPS, but they also share the certificate,
# and therefore, will share the connection.
#
connect_request = ConnectRequest.new(req.uri, @options)
@inflight += 1
parser.send(connect_request)
else
handle_transition(:connected)
end
end
def __http_on_connect(request, response)
@inflight -= 1
if response.is_a?(Response) && response.status == 200
req = @pending.first
request_uri = req.uri
@io = ProxySSL.new(@io, request_uri, @options)
transition(:connected)
throw(:called)
elsif response.is_a?(Response) &&
response.status == 407 &&
!request.headers.key?("proxy-authorization") &&
@options.proxy.can_authenticate?(response.headers["proxy-authenticate"])
request.transition(:idle)
request.headers["proxy-authorization"] = @options.proxy.authenticate(request, response.headers["proxy-authenticate"])
@parser.send(request)
@inflight += 1
else
pending = @pending + @parser.pending
while (req = pending.shift)
response.finish!
req.response = response
req.emit(:response, response)
end
reset
end
end
end
module ProxyParser
def join_headline(request)
return super if request.verb == "CONNECT"
"#{request.verb} #{request.uri} HTTP/#{@version.join(".")}"
end
def set_protocol_headers(request)
extra_headers = super
proxy_params = @options.proxy
if proxy_params.scheme == "basic"
# opt for basic auth
extra_headers["proxy-authorization"] = proxy_params.authenticate(extra_headers)
end
extra_headers["proxy-connection"] = extra_headers.delete("connection") if extra_headers.key?("connection")
extra_headers
end
end
class ConnectRequest < Request
def initialize(uri, options)
super("CONNECT", uri, options)
@headers.delete("accept")
end
def path
"#{@uri.hostname}:#{@uri.port}"
end
end
end
end
register_plugin :"proxy/http", Proxy::HTTP
end
end
|
