inside this file is a webserver that will output the text "LinkedList NYC" on network port 31337 via HTTP.
executes with ruby 1.9.3
ruby -x ./readme.markdown to run the server,
do a killall ruby to stop the server
ruby run.rb to run the server once, output with curl, then stop.
in your terminal run curl localhost:31337 to get the output,
something resembling "LinkedList NYC" should output, unless there's some
tragic error.
#!/usr/bin/env ruby -w
# This script is a simple ruby web server that
# serves the file it is inside.
require 'socket'
Process.daemon
server = TCPServer.new(31337)
DATA.rewind
data = DATA.read
# Pull out first letters
parts = data.split('```')
first = parts.first.split("\n").map{|l| l[0] }
# Pluck out NYC
last = ""
lines = parts.last.split("\n")
lines.each_with_index do |l, i|
last += ( l[0] || "\n") if lines.fetch(i+1, '')[0] == '-'
end
# Finish output
out = first.join.gsub(/[^\w]/, '') + " " + last
# Serve http
loop do
Thread.start(server.accept) do |client|
lines = []
while line = client.gets and line !~ /^\s*$/
lines << line.chomp
end
client.puts <<-MESSAGE.gsub("\n", "\r\n")
HTTP/1.1 200 OK
Content-Type: text/plain
Content-Length: #{out.bytesize+2}
Connection: close
#{out}
MESSAGE
client.close
Thread.exit
end
end
__END__The script there in the middle is a web server. Ruby can run scripts embedded
inside of text files. I have no idea why, but the bits between the shebang
and the __END__ block become executable with the -x flag sent to ruby.
Once the script starts running, everything after __END__ becomes available as
as the constant DATA, which allows rewinding to the beginning of the file so
that you can see everything before the __END__ as well.
After that, it's a simple matter of plucking out the message from the rest of the DATA block and outputting it with http headers.
ab -c 10 -n 1000 http://localhost:31337/
Requests per second: 3095.75 [#/sec] (mean)
Time per request: 3.230 [ms] (mean)
Time per request: 0.323 [ms] (mean, across all concurrent requests)
This script brought to you by Hurricane Sandy.
It uses quite a few tricks learned from https://speakerdeck.com/jeg2/10-things-you-didnt-know-ruby-could-do