HTTP::Proxy

A HTTP Proxy server and client written in Crystal

Installation

Add this to your application's shard.yml:

dependencies:
  http_proxy:
    github: mamantoha/http_proxy

Usage

Server

require "http_proxy"

server = HTTP::Proxy::Server.new("127.0.0.1", 8080)

puts "Listening on http://#{server.host}:#{server.port}"
server.listen

require "http_proxy"
require "option_parser"

host = "192.168.0.1"
port = 3128

OptionParser.parse! do |opts|
  opts.on("-h HOST", "--host HOST", "define host to run server") do |opt|
    host = opt
  end

  opts.on("-p PORT", "--port PORT", "define port to run server") do |opt|
    port = opt.to_i
  end
end

server = HTTP::Proxy::Server.new(host, port, handlers: [
  HTTP::LogHandler.new,
]) do |context|
  context.perform
end

puts "Listening on http://#{server.host}:#{server.port}"
server.listen

Basic Authentication

server = HTTP::Proxy::Server.new("127.0.0.1", 8080, handlers: [
  HTTP::LogHandler.new,
  HTTP::Proxy::Server::BasicAuth.new("user", "passwd"),
]) do |context|
  context.request.headers.add("X-Forwarded-For", "127.0.0.1")
  context.perform
end

Client

Make HTTP request:

Note: you should send full URL instead of path when using HTTP proxy.

require "http_proxy"

proxy_client = HTTP::Proxy::Client.new("127.0.0.1", 8080)

uri = URI.parse("http://httpbin.org")
client = HTTP::Client.new(uri)
client.set_proxy(proxy_client)
response = client.get("http://httpbin.org/get")

Make HTTPS request:

require "http_proxy"

proxy_client = HTTP::Proxy::Client.new("127.0.0.1", 8080)

uri = URI.parse("https://httpbin.org")
response = HTTP::Client.new(uri) do |client|
  client.set_proxy(proxy_client)
  client.get("/get")
end

Basic Authentication

uri = URI.parse("http://httpbin.org")
proxy_client = HTTP::Proxy::Client.new("127.0.0.1", 8080, username: "user", password: "passwd")

response = HTTP::Client.new(uri) do |client|
  client.set_proxy(proxy_client)
  client.get("http://httpbin.org/get")
end

puts response.status_code
puts response.body

Development

Proxy server

• [x] Basic HTTP Proxy: GET, POST, PUT, DELETE support
• [x] Basic HTTP Proxy: OPTIONS support
• [x] HTTPS Proxy: CONNECT support
• [x] Make context.request & context.response writable
• [x] Basic Authentication
• [ ] MITM HTTPS Proxy

Proxy client

• [x] Basic HTTP Proxy: GET, POST, PUT, DELETE support
• [x] Basic HTTP Proxy: OPTIONS support
• [x] HTTPS Proxy: CONNECT support
• [x] Basic Authentication

Contributing

1. Fork it ( https://github.com/mamantoha/http_proxy/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

Contributors

• bbtfr Theo Li - creator, maintainer
• mamantoha Anton Maminov - maintainer