crawler.rb

require 'socket'
require 'nokogiri'

host = 'www.so.com'
port = 80
path = "http://www.so.com/s?psid=aa1636dc9ced822ddb741bd94af183fc&q=%E8%89%BA%E9%BE%99&pq=%E8%89%BA%E9%BE%99&src=srp&fr=360sou_newhome"

request = "GET #{path} HTTP/1.0\r\n\r\n"
socket = TCPSocket.open(host, port)
socket.print(request)
response = socket.read
headers, body = response.split("\r\n\r\n",2)
#print body

doc= Nokogiri::HTML(body)
str=[]
WEntry=doc.at(".mod-relation").css('a').each do |t|
  str << t
   puts t.text
end
puts str.length