Re: [WEBrick] howto rewrite url

< ^ > P N |<>|^_>< --- | ~ ...Help
On Tue, 30 Nov 2004 08:12:29 +0900, GOTOU Yuuzou <gotoyuzo / notwork.org> wrote:
> In message <df1390cc041129131574b9146d / mail.gmail.com>,
>  `Simon Strandgaard <neoneye / gmail.com>' wrote:
> > I am curious to if its possible to rename the url of the
> > request "on the server".. so that user-agent never knows about that
> > redirecting occured?
> 
> It isn't possible yet.  First, I'd like to make it possible
> in 1.9.
> 
 

I have investigated how to rewrite urls.. and have made this code.
It rewrites urls from "show-all.html" to "show.cgi?all".
And from "show-abcd.html" to "show.cgi?first=a;last=d".


I hope its usable.



require "webrick"
 
class WEBrick::HTTPServer
  alias :old_initialize :initialize
  alias :old_service :service
  def initialize(config={}, default=WEBrick::Config::HTTP)
    old_initialize(config, default)
    @rewrite_rules = []
  end
  def rewrite(pattern, subst)
    @logger.debug("rewrite rule %s -> %s." %
      [pattern.inspect, subst])
    @rewrite_rules << [pattern, subst]
  end
  def service(req, res)
    path = req.path
    @rewrite_rules.each do |pattern, subst|
      if pattern =~ path
        new_path = path.gsub(pattern, subst)
        @logger.debug("rewrote url from %s to %s" % [path, new_path])
        req.instance_variable_set("@path", new_path)
        # TODO: req.query = reload
        break
      end
    end
    old_service(req, res)
  end
end
 
class PageServlet < WEBrick::HTTPServlet::AbstractServlet
  def do_GET(req, res)
    ary = [
      ["path", req.path],
      ["path_info", req.path_info],
      ["request_uri", req.request_uri.inspect],
      ["unparsed_uri", req.unparsed_uri.inspect],
      ["query", req.query.inspect],
      ["query_string", req.query_string.inspect]
    ]
    rows = ary.map{|line|
      cells = line.map{|cell| "<td>#{cell}</td>"}.join
      "<tr>#{cells}</tr>"
    }.join
    str = "<table>#{rows}</table>"
    res.body = "<html><body>#{str}</body></html>"
    res['Content-Type'] = "text/html; charset=iso-8859-1"
  end
end
 
if $0 == __FILE__
  s = WEBrick::HTTPServer.new(
    :Port         => 10080,
    :Logger       => WEBrick::Log.new($stderr, WEBrick::Log::DEBUG),
    :AccessLog    => [
      [ $stderr, WEBrick::AccessLog::COMMON_LOG_FORMAT  ],
      [ $stderr, WEBrick::AccessLog::REFERER_LOG_FORMAT ],
      [ $stderr, WEBrick::AccessLog::AGENT_LOG_FORMAT   ],
    ]
  )
  s.mount("/", PageServlet)
  s.mount("/show.cgi", PageServlet)
  s.rewrite(/show-all.html(?=$|\?)/, "show.cgi?all")
  s.rewrite(/show-abcd.html$/, "show.cgi?first=a;last=d")
  trap(:INT) do
    #fork{ s.shutdown }
    exit!
  end
  s.start
end