Created
October 19, 2011 16:19
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Net:HTTP tutorial #1: start block and keep alive requests
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# Use the right Net::HTTP api for the right job | |
# | |
# use start block and do all requests within it | |
# | |
# usecase examples: to build a proxy, a scraper or similars | |
require 'net/http' | |
class Getter # simplifies the Net::HTTP api a bit | |
attr_reader :uri | |
def initialize(host, protocol=nil) | |
prot = protocol || "http" | |
url = "#{prot}://#{host}" | |
@uri = URI.parse url | |
end | |
def start(&block) | |
Net::HTTP.start(@uri.host, @uri.port) do |http| | |
@http = http | |
block.call(self) | |
end | |
end | |
def get(path) | |
resp = @http.get path | |
resp.body | |
end | |
end | |
NUM = 10 | |
require 'benchmark' | |
bench1 = Benchmark.measure do | |
g = Getter.new "makevoid.com" | |
g.start do |g| | |
NUM.times do | |
g.get "/" | |
end | |
end | |
end | |
bench2 = Benchmark.measure do | |
NUM.times do | |
uri = URI.parse "http://makevoid.com" | |
Net::HTTP.get_response uri | |
end | |
end | |
puts "#{NUM} requests" | |
puts "With Keep-Alive HEADER (all gets within a start block)" | |
puts bench1 | |
puts "without (normal get_response)" | |
puts bench2 | |
# results: | |
# | |
# 100 requests | |
# With Keep-Alive HEADER (all gets within a start block) | |
# 0.090000 0.040000 0.130000 ( 10.459873) | |
# without (normal get_response) | |
# 0.160000 0.090000 0.250000 ( 23.070951) | |
# we're saving a HEAD request for each request! sometimes this is almost twice as fast! | |
# | |
# @drogus slides from talk at @rupy: http://rupy-http.strobeapp.com/ - very recommended! | |
# | |
# [next chapter: concurrent http requests] |
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