Beginner Question with Net::Proxy

ruby-talk
1

Hi,

I'm trying without success to do an http get via a proxy using net/http and I just can't work it out. Got any suggestions where I'm going wrong, how the code could be made simpler? Are there any decent docs for the library net library? My non working code follows.

I redefined the InternetMessageIO method connect to see what the net/http library is doing and it isn't using the proxy settings.

regards,

Richard.

···

-----

require 'net/http'
require 'cgi'

class HttpGetError < Exception
  attr_reader :response
  def initialize(response)
    @response = response
  end
end

module Net

  class InternetMessageIO
       def connect( open_timeout )
      puts "LOG: opening connection to #{@address}..."
      timeout(open_timeout) {
        @socket = TCPsocket.new(@address, @port)
      }
      @rbuf = ''
    end
     end

end

class PubMed

  attr_reader :proxy_addr, :proxy_port, :proxy

  def initialize
    @einfo = "http://eutils.ncbi.nlm.nih.gov/entrez/eutils/einfo.fcgi"
    @proxy_addr = "proxy" # this is my local proxy
    @proxy_port = 80
    @proxy = Net::HTTP::Proxy(@proxy_address, @proxy_port)
  end

  def query(base, cgi_args)
    uri = URI.parse(base)
    cgi_arg_list = cgi_args.collect { |h,v| h + "=" + CGI.escape(v) }
    uri.query = cgi_arg_list.join("&")

    puts "Fetching .... " + uri.to_s
    @proxy.start(uri.host, uri.port) { |http|
      resp = @proxy.get(uri.path + "?" + uri.query)
      puts resp.class
      resp = http.get(uri)
      if resp.message == "OK" then
        return resp.data
      else
        raise(HttpGetError.new(response), "Http Get Failed: " + response.to_s)
      end
    }
  end

  def databases
    return query(@einfo, {})
  end

end

pubmed = PubMed.new
puts "Databases:"
puts pubmed.databases

2

class PubMed

  attr_reader :proxy_addr, :proxy_port, :proxy

  def initialize
    @einfo =

"http://eutils.ncbi.nlm.nih.gov/entrez/eutils/einfo.fcgi&quot;

    @proxy_addr = "proxy" # this is my local proxy
    @proxy_port = 80
    @proxy = Net::HTTP::Proxy(@proxy_address, @proxy_port)

                                ^^^^^^^^^^^^^^
Surely you meant @proxy_addr ?...

  end

  def query(base, cgi_args)
    uri = URI.parse(base)
    cgi_arg_list = cgi_args.collect { |h,v| h + "=" + CGI.escape(v) }
    uri.query = cgi_arg_list.join("&")

    puts "Fetching .... " + uri.to_s
    @proxy.start(uri.host, uri.port) { |http|

of these lines:

      resp = @proxy.get(uri.path + "?" + uri.query)
      puts resp.class
      resp = http.get(uri)

you dont need this line - you should only use the http object.
        resp = http.get(uri.path + "?" + uri.query)
        puts resp.class

HTH,
Assaph