create a http server and read the request body as binary and return a binary response in ruby

Here's an example of how you could create a HTTP server in Ruby and read the request body as binary data, and return a binary response:


main.rb
require 'socket'

class HTTPServer
  def initialize(host, port)
    @server = TCPServer.new(host, port)
    puts "Listening on #{host}:#{port}..."
  end

  def run
    loop do
      client = @server.accept
      handle_request(client)
      client.close
    end
  end

  def handle_request(client)
    # Read the first line of the request
    request_line = client.gets

    # Read the headers of the request (just for demo purposes)
    headers = {}
    loop do
      header_line = client.gets.chomp
      break if header_line.empty?
      key, value = header_line.split(': ')
      headers[key] = value
    end

    # Read the request body as binary data
    content_length = headers['Content-Length'].to_i
    request_body = client.read(content_length)

    # Build the response
    response_body = "Hello, world!"
    response_headers = {
      'Content-Type' => 'application/octet-stream', # binary data
      'Content-Length' => response_body.bytesize.to_s
    }
    response = "HTTP/1.1 200 OK\r\n" + response_headers.map { |k, v| "#{k}: #{v}" }.join("\r\n") + "\r\n\r\n" + response_body

    # Return the response as binary data
    client.write(response)
  end
end

server = HTTPServer.new('localhost', 8080)
server.run
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This example uses a plain TCP socket to listen for incoming connections, and reads the request line and headers using gets. It then reads the request body as binary data by calling read on the socket with the length specified in the Content-Length header.

The example then builds a simple response by encoding a string as binary data (response_body.bytesize returns the number of bytes in the string), and sends the response back to the client as binary data using write on the socket.

Note that this example is for demo purposes only - in practice, you'd want to handle errors, timeouts, and other edge cases.

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related categories

ruby

http server

read binary request body

binary response