Ruby TCP server basics

Question

Can someone explain to me what each part of this code is doing? It would be helpful if someone could give me a step by step explanation. Also, how could I upload files? How do I manipulate a ruby server in general?

#!/usr/bin/env ruby

require 'socket'
require 'cgi'

server = TCPServer.new('127.0.0.1', 8888)
puts 'Listening on 127.0.0.1:8888'

loop {
  client = server.accept

  first_request_header = client.gets
  resp = first_request_header

  headers = ['http/1.1 200 ok',
             "date: #{CGI.rfc1123_date(Time.now)}",
             'server: ruby',
             'content-type: text/html; charset=iso-8859-1',
            "content-length: #{resp.length}\r\n\r\n"].join("\r\n")
  client.puts headers          # send the time to the client
  client.puts resp
  client.close
}

BlackHatSamurai · Accepted Answer · 2013-03-10 03:09:53Z

2

#required gems
require 'socket'
require 'cgi'

#creating new connection to a local host on port 8888
server = TCPServer.new('127.0.0.1', 8888)
puts 'Listening on 127.0.0.1:8888'

loop {
  #looks like a client method call to open the connection
  client = server.accept
  first_request_header = client.gets
  resp = first_request_header

  #setting the request headers
  headers = ['http/1.1 200 ok',
             "date: #{CGI.rfc1123_date(Time.now)}",
             'server: ruby',
             'content-type: text/html; charset=iso-8859-1',
            "content-length: #{resp.length}\r\n\r\n"].join("\r\n")

  #inserts custom client headers into request
  client.puts headers         
  client.puts resp

  #closes client connection to local host
  client.close
}

answered Mar 10, 2013 at 3:09

BlackHatSamurai

23.6k22 gold badges100 silver badges160 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

nlsun Over a year ago

what is client.gets doing? What are request headers and why would you need to set them? What does inserting a header into a request mean?

BlackHatSamurai Over a year ago

Here is what .gets does: ruby-doc.org/stdlib-1.9.3/libdoc/socket/rdoc/Socket.html

nlsun Over a year ago

also why does the output to the server seem to get cut off after 30 characters

Collectives™ on Stack Overflow

Ruby TCP server basics

1 Answer 1

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related