diff options
Diffstat (limited to 'ruby_1_8_6/lib/webrick/httpproxy.rb')
-rw-r--r-- | ruby_1_8_6/lib/webrick/httpproxy.rb | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/ruby_1_8_6/lib/webrick/httpproxy.rb b/ruby_1_8_6/lib/webrick/httpproxy.rb new file mode 100644 index 0000000000..14e3499775 --- /dev/null +++ b/ruby_1_8_6/lib/webrick/httpproxy.rb @@ -0,0 +1,254 @@ +# +# 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 |