ruby, xml and hpricot

I'm starting to play with xml in ruby. After asking around on IRC, using hpricot was recommend to me.

I've been play a city at myminicity.com.

You can get xml of city details from an URL like this http://gnollford.myminicity.com/xml

I've written a small chunk of ruby that read & analysis the xml and generates a web address the help build the city to best advantage.

require 'net/http'
require 'rubygems'
require 'hpricot'

url = ['http://gnollford.myminicity.com/',
       'http://extremesville.myminicity.com/',
       'http://froosh.myminicity.com/',
       'http://griff-stadt.myminicity.com/',
       'http://warlach.myminicity.com/',
       'http://aeoth.myminicity.com/',
       'http://halloranelder.myminicity.com/',
       'http://cricklewood.myminicity.com/',
       'http://twodogs.myminicity.com/',
       'http://iliad.myminicity.com/',
       'http://meatteam.myminicity.com/',
       'http://aushpb.myminicity.com/',
       'http://brisbane.myminicity.com/']
       
source="NET"
#source="FILE"
       
url.each do |cityurl|

  if source == "NET" 
    xml_data = Net::HTTP.get_response(URI.parse(cityurl+"xml")).body
  else # FILE branch
    xml_data = File.open('data1.xml')
  end

  doc = Hpricot::XML(xml_data)
  (doc/:city).each do |xml_city|
    #puts doc.search("/city/bases").first.attributes["ind"] 
    #puts doc.search("/city/bases").first.attributes["tra"] 
    #puts doc.search("/city/bases").first.attributes["sec"] 
    #puts doc.search("/city/bases").first.attributes["env"] 
    
    region = doc.search("/city/region").first.attributes["code"]
    nm = doc.search("/city/name").first.innerHTML
    ranking = doc.search("/city/ranking").first.innerHTML
   
    typ = ""
    vector = 0
    
    uem = doc.search("/city/unemployment").first.innerHTML.to_i
    if uem > vector
      vector = uem
      typ = "ind"
    end
    
    tra = doc.search("/city/transport").first.innerHTML.to_i
    trap = 100-tra
    if trap > vector
      vector = trap
      typ = "tra"
    end
    
    cri = doc.search("/city/criminality").first.innerHTML.to_i
    if cri > vector
      vector = cri
      typ = "sec"
    end
    
    pol = doc.search("/city/pollution").first.innerHTML.to_i
    if pol > vector
      vector = pol
      typ = "env"
    end

    printf(cityurl+typ+" "+nm+" "+typ+" "+region+" "+ranking+"\n")
  end
end

the output

http://gnollford.myminicity.com/ Gnollford  AU 1743
http://extremesville.myminicity.com/ Extremesville  AU 1450
http://froosh.myminicity.com/tra Froosh tra AU 803
http://griff-stadt.myminicity.com/tra Griff-Stadt tra AU 1029
http://warlach.myminicity.com/ Warlach  AU 1196
http://aeoth.myminicity.com/ind Aeoth ind AU 1304
http://halloranelder.myminicity.com/ HalloranElder  AU 505
http://cricklewood.myminicity.com/ cricklewood  GB 452
http://twodogs.myminicity.com/ TwoDogs  AU 779
http://iliad.myminicity.com/tra Iliad tra AU 81
http://meatteam.myminicity.com/ meatteam  AU 14644
http://aushpb.myminicity.com/env aushpb env AU 82
http://brisbane.myminicity.com/tra brisbane tra AU 3

It easy to take the next step and generate html, I didn't just to keep this blog post's html simple.


Gnoll110