require 'open-uri'
puts 'using "open-uri"'
puts open('http://oreilly.com/').read(200)

# ------------------------------------------------------------
require 'net/http'
puts 'using "net/http"'
response = Net::HTTP.get_response('oreilly.com', '/about/')
puts 'response.code=', response.code
puts 'response.body.size=', response.body.size
puts 'response[\'Content-type\']=', response['Content-type']
puts 'response[0, 200]', response.body[0, 200]


# ------------------------------------------------------------
require 'uri'
puts 'using "net/http" with a URI'
puts 'request object:', \
    Net::HTTP.get(URI.parse("http://oreilly.com"))
puts 'full response:'
response = Net::HTTP.get_response(URI.parse("http://oreilly.com/about/"))

# .........
puts "Success!" if response.is_a? Net::HTTPOK

puts case response.code[0]
    when ?1 then "Status code indicates an HTTP informational response."
    when ?2 then "Status code indicates success."
    when ?3 then "Status code indicates redirection."
    when ?4 then "Status code indicates client error."
    when ?5 then "Status code indicates server error."
    else "Non-standard status code."
end

puts 'Server=', response['Server']
puts 'SERVER=', response['SERVER']

puts 'all keys:'
response.each_key { |key| puts key }

Net::HTTP.get_response('oreilly.com', '/about/') do |response|
    response.read_body do |segment|
        puts "Received segment of #{segment.size} byte(s)!"
    end
end