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diff --git a/ruby_1_8_5/lib/webrick/httpproxy.rb b/ruby_1_8_5/lib/webrick/httpproxy.rb
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+#
+# httpproxy.rb -- HTTPProxy Class
+#
+# Author: IPR -- Internet Programming with Ruby -- writers
+# Copyright (c) 2002 GOTO Kentaro
+# Copyright (c) 2002 Internet Programming with Ruby writers. All rights
+# reserved.
+#
+# $IPR: httpproxy.rb,v 1.18 2003/03/08 18:58:10 gotoyuzo Exp $
+# $kNotwork: straw.rb,v 1.3 2002/02/12 15:13:07 gotoken Exp $
+
+require "webrick/httpserver"
+require "net/http"
+
+Net::HTTP::version_1_2 if RUBY_VERSION < "1.7"
+
+module WEBrick
+ NullReader = Object.new
+ class << NullReader
+ def read(*args)
+ nil
+ end
+ alias gets read
+ end
+
+ class HTTPProxyServer < HTTPServer
+ def initialize(config)
+ super
+ c = @config
+ @via = "#{c[:HTTPVersion]} #{c[:ServerName]}:#{c[:Port]}"
+ end
+
+ def service(req, res)
+ if req.request_method == "CONNECT"
+ proxy_connect(req, res)
+ elsif req.unparsed_uri =~ %r!^http://!
+ proxy_service(req, res)
+ else
+ super(req, res)
+ end
+ end
+
+ def proxy_auth(req, res)
+ if proc = @config[:ProxyAuthProc]
+ proc.call(req, res)
+ end
+ req.header.delete("proxy-authorization")
+ end
+
+ # Some header fields shuold not be transfered.
+ HopByHop = %w( connection keep-alive proxy-authenticate upgrade
+ proxy-authorization te trailers transfer-encoding )
+ ShouldNotTransfer = %w( set-cookie proxy-connection )
+ def split_field(f) f ? f.split(/,\s+/).collect{|i| i.downcase } : [] end
+
+ def choose_header(src, dst)
+ connections = split_field(src['connection'])
+ src.each{|key, value|
+ key = key.downcase
+ if HopByHop.member?(key) || # RFC2616: 13.5.1
+ connections.member?(key) || # RFC2616: 14.10
+ ShouldNotTransfer.member?(key) # pragmatics
+ @logger.debug("choose_header: `#{key}: #{value}'")
+ next
+ end
+ dst[key] = value
+ }
+ end
+
+ # Net::HTTP is stupid about the multiple header fields.
+ # Here is workaround:
+ def set_cookie(src, dst)
+ if str = src['set-cookie']
+ cookies = []
+ str.split(/,\s*/).each{|token|
+ if /^[^=]+;/o =~ token
+ cookies[-1] << ", " << token
+ elsif /=/o =~ token
+ cookies << token
+ else
+ cookies[-1] << ", " << token
+ end
+ }
+ dst.cookies.replace(cookies)
+ end
+ end
+
+ def set_via(h)
+ if @config[:ProxyVia]
+ if h['via']
+ h['via'] << ", " << @via
+ else
+ h['via'] = @via
+ end
+ end
+ end
+
+ def proxy_uri(req, res)
+ @config[:ProxyURI]
+ end
+
+ def proxy_service(req, res)
+ # Proxy Authentication
+ proxy_auth(req, res)
+
+ # Create Request-URI to send to the origin server
+ uri = req.request_uri
+ path = uri.path.dup
+ path << "?" << uri.query if uri.query
+
+ # Choose header fields to transfer
+ header = Hash.new
+ choose_header(req, header)
+ set_via(header)
+
+ # select upstream proxy server
+ if proxy = proxy_uri(req, res)
+ proxy_host = proxy.host
+ proxy_port = proxy.port
+ if proxy.userinfo
+ credentials = "Basic " + [proxy.userinfo].pack("m*")
+ credentials.chomp!
+ header['proxy-authorization'] = credentials
+ end
+ end
+
+ response = nil
+ begin
+ http = Net::HTTP.new(uri.host, uri.port, proxy_host, proxy_port)
+ http.start{
+ if @config[:ProxyTimeout]
+ ################################## these issues are
+ http.open_timeout = 30 # secs # necessary (maybe bacause
+ http.read_timeout = 60 # secs # Ruby's bug, but why?)
+ ##################################
+ end
+ case req.request_method
+ when "GET" then response = http.get(path, header)
+ when "POST" then response = http.post(path, req.body || "", header)
+ when "HEAD" then response = http.head(path, header)
+ else
+ raise HTTPStatus::MethodNotAllowed,
+ "unsupported method `#{req.request_method}'."
+ end
+ }
+ rescue => err
+ logger.debug("#{err.class}: #{err.message}")
+ raise HTTPStatus::ServiceUnavailable, err.message
+ end
+
+ # Persistent connction requirements are mysterious for me.
+ # So I will close the connection in every response.
+ res['proxy-connection'] = "close"
+ res['connection'] = "close"
+
+ # Convert Net::HTTP::HTTPResponse to WEBrick::HTTPProxy
+ res.status = response.code.to_i
+ choose_header(response, res)
+ set_cookie(response, res)
+ set_via(res)
+ res.body = response.body
+
+ # Process contents
+ if handler = @config[:ProxyContentHandler]
+ handler.call(req, res)
+ end
+ end
+
+ def proxy_connect(req, res)
+ # Proxy Authentication
+ proxy_auth(req, res)
+
+ ua = Thread.current[:WEBrickSocket] # User-Agent
+ raise HTTPStatus::InternalServerError,
+ "[BUG] cannot get socket" unless ua
+
+ host, port = req.unparsed_uri.split(":", 2)
+ # Proxy authentication for upstream proxy server
+ if proxy = proxy_uri(req, res)
+ proxy_request_line = "CONNECT #{host}:#{port} HTTP/1.0"
+ if proxy.userinfo
+ credentials = "Basic " + [proxy.userinfo].pack("m*")
+ credentials.chomp!
+ end
+ host, port = proxy.host, proxy.port
+ end
+
+ begin
+ @logger.debug("CONNECT: upstream proxy is `#{host}:#{port}'.")
+ os = TCPSocket.new(host, port) # origin server
+
+ if proxy
+ @logger.debug("CONNECT: sending a Request-Line")
+ os << proxy_request_line << CRLF
+ @logger.debug("CONNECT: > #{proxy_request_line}")
+ if credentials
+ @logger.debug("CONNECT: sending a credentials")
+ os << "Proxy-Authorization: " << credentials << CRLF
+ end
+ os << CRLF
+ proxy_status_line = os.gets(LF)
+ @logger.debug("CONNECT: read a Status-Line form the upstream server")
+ @logger.debug("CONNECT: < #{proxy_status_line}")
+ if %r{^HTTP/\d+\.\d+\s+200\s*} =~ proxy_status_line
+ while line = os.gets(LF)
+ break if /\A(#{CRLF}|#{LF})\z/om =~ line
+ end
+ else
+ raise HTTPStatus::BadGateway
+ end
+ end
+ @logger.debug("CONNECT #{host}:#{port}: succeeded")
+ res.status = HTTPStatus::RC_OK
+ rescue => ex
+ @logger.debug("CONNECT #{host}:#{port}: failed `#{ex.message}'")
+ res.set_error(ex)
+ raise HTTPStatus::EOFError
+ ensure
+ if handler = @config[:ProxyContentHandler]
+ handler.call(req, res)
+ end
+ res.send_response(ua)
+ access_log(@config, req, res)
+
+ # Should clear request-line not to send the sesponse twice.
+ # see: HTTPServer#run
+ req.parse(NullReader) rescue nil
+ end
+
+ begin
+ while fds = IO::select([ua, os])
+ if fds[0].member?(ua)
+ buf = ua.sysread(1024);
+ @logger.debug("CONNECT: #{buf.size} byte from User-Agent")
+ os.syswrite(buf)
+ elsif fds[0].member?(os)
+ buf = os.sysread(1024);
+ @logger.debug("CONNECT: #{buf.size} byte from #{host}:#{port}")
+ ua.syswrite(buf)
+ end
+ end
+ rescue => ex
+ os.close
+ @logger.debug("CONNECT #{host}:#{port}: closed")
+ end
+
+ raise HTTPStatus::EOFError
+ end
+
+ def do_OPTIONS(req, res)
+ res['allow'] = "GET,HEAD,POST,OPTIONS,CONNECT"
+ end
+ end
+end