kemal-csrf

0.4.05 versions

github.com/fridgerator/kemal-csrf

Add CSRF protection to your Kemal application

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License: MIT

Nothing has been indexed for 0.4.0 yet. The tag is recorded, its shard.yml has not been read, so the manifest and dependency list below are empty because they are unknown rather than because they are absent.

Installation

# Add this to your shard.yml
dependencies:
  kemal-csrf:
    github: fridgerator/kemal-csrf
    version: ~> 0.4.0

Then run:

shards install

shard.yml

No shard.yml has been indexed for 0.4.0. You can read it on the repository.

Dependencies

Unknown: the shard.yml for this version has not been read yet.

README

This README is the one indexed from the repository at its latest ref, not from the tag for this version.

kemal-csrf

Adds CSRF protection to your Kemal application.

Requires a session middleware to be initialized first.

Installation

Add this to your application's shard.yml:

dependencies:
  kemal-csrf:
    github: kemalcr/kemal-csrf

Usage

Basic Use

require "kemal-csrf"

add_handler CSRF.new

You can also change the name of the form field, header name, the methods which don't need csrf,error message and routes which you don't want csrf to apply. All of these are optional

require "kemal-csrf"

add_handler CSRF.new(
  header: "X_CSRF_TOKEN",
  allowed_methods: ["GET", "HEAD", "OPTIONS", "TRACE"],
  allowed_routes: ["/api/somecallback"],
  parameter_name: "_csrf", 
  error: "CSRF Error" 
)

If you need to have some logic within your error response, you can also pass it a proc (a pointer to a function)

require "kemal-csrf"

add_handler CSRF.new(
  header: "X_CSRF_TOKEN",
  allowed_methods: ["GET", "HEAD", "OPTIONS", "TRACE"],
  allowed_routes: ["/api/somecallback"],
  parameter_name: "_csrf", 
  error: ->myerrorhandler(HTTP::Server::Context)
)

def myerrorhandler(env)
  if env.request.headers["Content-Type"]? == "application/json"
    {"error" => "csrf error"}.to_json
  else
    "<html><head><title>Error</title><body><h1>You cannot post to this route without a valid csrf token</h1></body></html>"
  end
end

Contributing

Fork it ( https://github.com/kemalcr/kemal-csrf/fork )
Create your feature branch (git checkout -b my-new-feature)
Commit your changes (git commit -am 'Add some feature')
Push to the branch (git push origin my-new-feature)
Create a new Pull Request

Contributors

sdogruyol Serdar Dogruyol - creator, maintainer

kemal-csrf

Installation

shard.yml

Dependencies

README

kemal-csrf

Installation

Usage

Contributing

Contributors

Documentation

Links

This release

Dependents

Repository

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