http_parser.rb

A simple callback-based HTTP request/response parser for writing http servers, clients and proxies.

This gem is built on top of joyent/http-parser and its java port http-parser/http-parser.java.

Supported Platforms

This gem aims to work on all major Ruby platforms, including:

• MRI 1.8, 1.9 and 2.0; should work on MRI 2.4+
• Rubinius
• JRuby
• win32

Usage

require "http/parser"

parser = Http::Parser.new

parser.on_headers_complete = proc do
  p parser.http_version

  p parser.http_method # for requests
  p parser.request_url

  p parser.status_code # for responses

  p parser.headers
end

parser.on_body = proc do |chunk|
  # One chunk of the body
  p chunk
end

parser.on_message_complete = proc do |env|
  # Headers and body is all parsed
  puts "Done!"
end

Feed raw data from the socket to the parser

parser << raw_data

Advanced Usage

Accept callbacks on an object

module MyHttpConnection
  def connection_completed
    @parser = Http::Parser.new(self)
  end

  def receive_data(data)
    @parser << data
  end

  def on_message_begin
    @headers = nil
    @body = ''
  end

  def on_headers_complete(headers)
    @headers = headers
  end

  def on_body(chunk)
    @body << chunk
  end

  def on_message_complete
    p [@headers, @body]
  end
end

Stop parsing after headers

parser = Http::Parser.new
parser.on_headers_complete = proc{ :stop }

offset = parser << request_data
body = request_data[offset..-1]