This library protects against typical web attacks. It was inspired in rack-protection Ruby gem.

Add this to your application's shard.yml:

dependencies:
  http-protection:
    github: rogeriozambon/http-protection

require "http/server"
require "http-protection"

server = HTTP::Server.new([
  HTTP::Protection::Deflect.new,
  HTTP::Protection::FrameOptions.new,
  HTTP::Protection::IpSpoofing.new,
  HTTP::Protection::Origin.new,
  HTTP::Protection::PathTraversal.new,
  HTTP::Protection::RemoteReferer.new,
  HTTP::Protection::StrictTransport.new,
  HTTP::Protection::XSSHeader.new
])

server.bind_tcp "0.0.0.0", 8080
server.listen

It protects against Denial-of-service attacks. You can define a several options for this middleware.

Example:

HTTP::Protection::Deflect.new(
  interval: 5,
  duration: 5,
  threshold: 10,
  blacklist: ["111.111.111.111"],
  whitelist: ["222.222.222.222"]
)

It protects against clickjacking, setting header to tell the browser avoid embedding the page in a frame. You can define one option for this middleware.

Example:

HTTP::Protection::FrameOptions.new(option: "SAMEORIGIN")

It detects IP spoofing attacks.

Example:

HTTP::Protection::IpSpoofing.new

It protects against unsafe HTTP requests when value of Origin HTTP request header doesn't match default or whitelisted URIs. You can define the whitelist of URIs.

Example:

HTTP::Protection::Origin.new(whitelist: ["http://friend.com"])

It protects against unauthorized access to file system attacks, unescapes '/' and '.' from PATH_INFO.

Example:

HTTP::Protection::PathTraversal.new

It doesn't accept unsafe HTTP requests if the Referer header is set to a different host. You can define the HTTP methods that are allowed.

Example:

HTTP::Protection::RemoteReferer.new(methods: ["GET"])

It protects against protocol downgrade attacks and cookie hijacking. You can define some options for this middleware.

Example:

HTTP::Protection::StrictTransport.new(
  max_age: 31536000,
  include_subdomains: false,
  preload: false
)

It sets X-XSS-Protection header to tell the browser to block attacks. XSS vulnerabilities enable an attacker to control the relationship between a user and a web site or web application that they trust.

You can define some options for this middleware.

Example:

HTTP::Protection::XSSHeader.new(
  xss_mode: "block"
  nosniff: true
)

It's possible to add a custom logger to replace the default behavior. You can add a logger that outputs to a file, for example.

Example:

log_file = File.open("./protection.log", "w")
HTTP::Protection::Logger.instance = Logger.new(log_file)

• rogeriozambon Rogério Zambon - creator, maintainer