Class: WEBrick::HTTPProxyServer
- Inherits:
-
HTTPServer
- Object
- GenericServer
- HTTPServer
- WEBrick::HTTPProxyServer
- Defined in:
- lib/webrick/httpproxy.rb
Overview
An HTTP Proxy server which proxies GET, HEAD and POST requests.
Instance Attribute Summary
Attributes inherited from GenericServer
#config, #listeners, #logger, #status, #tokens
Instance Method Summary collapse
- #do_CONNECT(req, res) ⇒ Object
- #do_GET(req, res) ⇒ Object
- #do_HEAD(req, res) ⇒ Object
- #do_OPTIONS(req, res) ⇒ Object
- #do_POST(req, res) ⇒ Object
-
#initialize(config = {}, default = Config::HTTP) ⇒ HTTPProxyServer
constructor
Proxy server configurations.
- #proxy_auth(req, res) ⇒ Object
- #proxy_service(req, res) ⇒ Object
- #proxy_uri(req, res) ⇒ Object
- #service(req, res) ⇒ Object
Methods inherited from HTTPServer
#access_log, #lookup_server, #mount, #mount_proc, #run, #search_servlet, #unmount, #virtual_host
Methods inherited from GenericServer
#[], #listen, #run, #setup_ssl_context, #shutdown, #ssl_context, #start, #stop
Constructor Details
#initialize(config = {}, default = Config::HTTP) ⇒ HTTPProxyServer
Proxy server configurations. The proxy server handles the following configuration items in addition to those supported by HTTPServer:
- :ProxyAuthProc
-
Called with a request and response to authorize a request
- :ProxyVia
-
Appended to the via header
- :ProxyURI
-
The proxy server’s URI
- :ProxyContentHandler
-
Called with a request and resopnse and allows modification of the response
- :ProxyTimeout
-
Sets the proxy timeouts to 30 seconds for open and 60 seconds for read operations
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# File 'lib/webrick/httpproxy.rb', line 54 def initialize(config={}, default=Config::HTTP) super(config, default) c = @config @via = "#{c[:HTTPVersion]} #{c[:ServerName]}:#{c[:Port]}" end |
Instance Method Details
#do_CONNECT(req, res) ⇒ Object
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# File 'lib/webrick/httpproxy.rb', line 102 def do_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").delete("\n") 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.}'") 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.bytesize} byte from User-Agent") os.syswrite(buf) elsif fds[0].member?(os) buf = os.sysread(1024); @logger.debug("CONNECT: #{buf.bytesize} byte from #{host}:#{port}") ua.syswrite(buf) end end rescue => ex os.close @logger.debug("CONNECT #{host}:#{port}: closed") end raise HTTPStatus::EOFError end |
#do_GET(req, res) ⇒ Object
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# File 'lib/webrick/httpproxy.rb', line 182 def do_GET(req, res) perform_proxy_request(req, res) do |http, path, header| http.get(path, header) end end |
#do_HEAD(req, res) ⇒ Object
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# File 'lib/webrick/httpproxy.rb', line 188 def do_HEAD(req, res) perform_proxy_request(req, res) do |http, path, header| http.head(path, header) end end |
#do_OPTIONS(req, res) ⇒ Object
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# File 'lib/webrick/httpproxy.rb', line 200 def do_OPTIONS(req, res) res['allow'] = "GET,HEAD,POST,OPTIONS,CONNECT" end |
#do_POST(req, res) ⇒ Object
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# File 'lib/webrick/httpproxy.rb', line 194 def do_POST(req, res) perform_proxy_request(req, res) do |http, path, header| http.post(path, req.body || "", header) end end |
#proxy_auth(req, res) ⇒ Object
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# File 'lib/webrick/httpproxy.rb', line 70 def proxy_auth(req, res) if proc = @config[:ProxyAuthProc] proc.call(req, res) end req.header.delete("proxy-authorization") end |
#proxy_service(req, res) ⇒ Object
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# File 'lib/webrick/httpproxy.rb', line 82 def proxy_service(req, res) # Proxy Authentication proxy_auth(req, res) begin self.send("do_#{req.request_method}", req, res) rescue NoMethodError raise HTTPStatus::MethodNotAllowed, "unsupported method `#{req.request_method}'." rescue => err logger.debug("#{err.class}: #{err.}") raise HTTPStatus::ServiceUnavailable, err. end # Process contents if handler = @config[:ProxyContentHandler] handler.call(req, res) end end |
#proxy_uri(req, res) ⇒ Object
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# File 'lib/webrick/httpproxy.rb', line 77 def proxy_uri(req, res) # should return upstream proxy server's URI return @config[:ProxyURI] end |
#service(req, res) ⇒ Object
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# File 'lib/webrick/httpproxy.rb', line 60 def service(req, res) if req.request_method == "CONNECT" do_CONNECT(req, res) elsif req.unparsed_uri =~ %r!^http://! proxy_service(req, res) else super(req, res) end end |