stevegrossi/stevegrossi

Cross-site request forgery is #5 on the OWASP Top Ten. CSRF allows an attacker to perform actions on a website as if they are an authenticated user.

This warning is raised when no call to protect_from_forgery is found in ApplicationController. This method prevents CSRF.

For Rails 4 applications, it is recommended that you use protect_from_forgery :with => :exception. This code is inserted into newly generated applications. The default is to nil out the session object, which has been a source of many CSRF bypasses due to session memoization.

See the Ruby Security Guide for details.

This cop is designed to help upgrade to Ruby 3.0. It will add the comment # frozen_string_literal: true to the top of files to enable frozen string literals. Frozen string literals may be default in Ruby 3.0. The comment will be added below a shebang and encoding comment. The frozen string literal comment is only valid in Ruby 2.3+.

Example: EnforcedStyle: when_needed (default)

# The `when_needed` style will add the frozen string literal comment
# to files only when the `TargetRubyVersion` is set to 2.3+.
# bad
module Foo
  # ...
end

# good
# frozen_string_literal: true

module Foo
  # ...
end

Example: EnforcedStyle: always

# The `always` style will always add the frozen string literal comment
# to a file, regardless of the Ruby version or if `freeze` or `<<` are
# called on a string literal.
# bad
module Bar
  # ...
end

# good
# frozen_string_literal: true

module Bar
  # ...
end

Example: EnforcedStyle: never

# The `never` will enforce that the frozen string literal comment does
# not exist in a file.
# bad
# frozen_string_literal: true

module Baz
  # ...
end

# good
module Baz
  # ...
end