Ruby TCP服务器基础

有人能给我解释一下这段代码的每一部分都在做什么吗？ 如果有人能给我一个循序渐进的解释，那将很有帮助。 还有，我如何上传文件？ 一般来说，我如何操作ruby服务器

#!/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
}

---

客户机正在做什么？什么是请求头，为什么需要设置它们？在请求中插入头意味着什么？下面是

.get

的作用：还有为什么服务器的输出在30个字符后似乎被切断了

#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
}