Initial commit

.gitignore

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+/.bundle/
+/.yardoc
+/Gemfile.lock
+/_yardoc/
+/coverage/
+/doc/
+/pkg/
+/spec/reports/
+/tmp/

.travis.yml

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+sudo: false
+language: ruby
+rvm:
+  - 2.3.2
+before_install: gem install bundler -v 1.13.6

CODE_OF_CONDUCT.md

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+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, gender identity and expression, level of experience,
+nationality, personal appearance, race, religion, or sexual identity and
+orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or
+advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic
+  address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or
+reject comments, commits, code, wiki edits, issues, and other contributions
+that are not aligned to this Code of Conduct, or to ban temporarily or
+permanently any contributor for other behaviors that they deem inappropriate,
+threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community. Examples of
+representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an appointed
+representative at an online or offline event. Representation of a project may be
+further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting the project team at sam.saffron@gmail.com. All
+complaints will be reviewed and investigated and will result in a response that
+is deemed necessary and appropriate to the circumstances. The project team is
+obligated to maintain confidentiality with regard to the reporter of an incident.
+Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good
+faith may face temporary or permanent repercussions as determined by other
+members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
+available at [http://contributor-covenant.org/version/1/4][version]
+
+[homepage]: http://contributor-covenant.org
+[version]: http://contributor-covenant.org/version/1/4/

Gemfile

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+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in mini_mime.gemspec
+gemspec

LICENSE.txt

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+The MIT License (MIT)
+
+Copyright (c) 2016 TODO: Write your name
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

README.md

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+# MiniMime
+
+Minimal mime type implementation for use with the mail and rest-client gem
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+gem 'mini_mime'
+```
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install mini_mime
+
+## Usage
+
+
+## Development
+
+After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake test` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
+
+To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
+
+## Contributing
+
+Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/mini_mime. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the [Contributor Covenant](http://contributor-covenant.org) code of conduct.
+
+
+## License
+
+The gem is available as open source under the terms of the [MIT License](http://opensource.org/licenses/MIT).
+

Rakefile

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+require "bundler/gem_tasks"
+require "rake/testtask"
+
+Rake::TestTask.new(:test) do |t|
+  t.libs << "test"
+  t.libs << "lib"
+  t.test_files = FileList['test/**/*_test.rb']
+end
+
+task :default => :test
+
+def pad(array)
+  max = []
+  array.each do |row|
+    i = 0
+    row.each do |col|
+      max[i] = [max[i] || 0, col.length].max
+      i += 1
+    end
+  end
+
+  array.each do |row|
+    i = 0
+    row.each do |col|
+      col << " " * (max[i] - col.length)
+      i += 1
+    end
+  end
+
+end
+
+desc "generate mime type database"
+task :rebuild_db do
+  puts "Generating mime type DB"
+  require 'mime/types'
+  index = {}
+
+  MIME::Types.each do |type|
+    type.extensions.each {|ext| (index[ext] ||= []) << type}
+  end
+
+  index.each do |k,list|
+    list.sort!{|a,b| a.priority_compare(b)}
+  end
+
+  buffer = []
+
+  index.each do |ext, list|
+    first = list.first
+    buffer << [ext.dup, first.content_type.dup, first.encoding.dup]
+  end
+
+  buffer.sort!{|a,b| a[0] <=> b[0]}
+
+  pad(buffer)
+
+  File.open("lib/db/mime.db", File::CREAT|File::TRUNC|File::RDWR) do |f|
+    buffer.each do |row|
+      f.write "#{row[0]} #{row[1]} #{row[2]}\n"
+    end
+  end
+
+  puts "#{buffer.count} rows written to lib/db/mime.db"
+
+end

bin/console

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+#!/usr/bin/env ruby
+
+require "bundler/setup"
+require "mini_mime"
+
+# You can add fixtures and/or initialization code here to make experimenting
+# with your gem easier. You can also use a different console, if you like.
+
+# (If you use this, don't forget to add pry to your Gemfile!)
+# require "pry"
+# Pry.start
+
+require "irb"
+IRB.start

bin/setup

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+#!/usr/bin/env bash
+set -euo pipefail
+IFS=$'\n\t'
+set -vx
+
+bundle install
+
+# Do any other automated setup that you need to do here

lib/mini_mime.rb

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+require "mini_mime/version"
+require "thread"
+
+module MiniMime
+  BINARY_ENCODINGS = %w(base64 8bit)
+
+  # return true if this filename is known to have binary encoding
+  #
+  # puts MiniMime.binary?("file.gif") => true
+  # puts MiniMime.binary?("file.txt") => false
+  def self.binary?(filename)
+    info = Db.lookup(filename)
+    !!(info && BINARY_ENCODINGS.include?(info.encoding))
+  end
+
+  # return first matching content type for a file
+  #
+  # puts MiniMime.content_type("test.xml") => "application/xml"
+  # puts MiniMime.content_type("test.gif") => "image/gif"
+  def self.content_type(filename)
+    info = Db.lookup(filename)
+    info && info.content_type
+  end
+
+  class Info
+    attr_accessor :extension, :content_type, :encoding
+    def initialize(buffer)
+      @extension,@content_type,@encoding = buffer.split(/\s+/).map!(&:freeze)
+    end
+  end
+
+  class Db
+    LOCK = Mutex.new
+    def self.lookup(filename)
+      extension = File.extname(filename)
+      if extension
+        extension.sub!(".", "")
+        if extension.length > 0
+          LOCK.synchronize do
+            @db = new
+            @db.lookup(extension)
+          end
+        else
+          nil
+        end
+      end
+    end
+
+    def initialize
+      @db_path ||= File.expand_path("../db/mime.db", __FILE__)
+      @file ||= File.open(@db_path)
+      @cache = {}
+      @row_length = @file.readline.length
+      @file_length = @file.size
+      @rows = @file_length / @row_length
+    end
+
+    def lookup(extension)
+      @cache.fetch(extension) do
+        @cache[extension] = lookup_uncached(extension)
+      end
+    end
+
+    #lifted from marcandre/backports
+    def lookup_uncached(extension)
+      from = 0
+      to = @rows - 1
+      result = nil
+
+      while from <= to do
+        midpoint = from + (to-from).div(2)
+        current = resolve(midpoint)
+        if current.extension > extension
+          to = midpoint - 1
+        elsif current.extension < extension
+          from = midpoint + 1
+        else
+          result = current
+          break
+        end
+      end
+      result
+    end
+
+    def resolve(row)
+      @file.seek(row*@row_length)
+      Info.new(@file.readline)
+    end
+  end
+end

lib/mini_mime/version.rb

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+module MiniMime
+  VERSION = "0.1.0"
+end

mini_mime.gemspec

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+# coding: utf-8
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'mini_mime/version'
+
+Gem::Specification.new do |spec|
+  spec.name          = "mini_mime"
+  spec.version       = MiniMime::VERSION
+  spec.authors       = ["Sam Saffron"]
+  spec.email         = ["sam.saffron@gmail.com"]
+
+  spec.summary       = %q{A lightweight mime type lookup toy}
+  spec.description   = %q{A lightweight mime type lookup toy}
+  spec.homepage      = ""
+  spec.license       = "MIT"
+
+  # Prevent pushing this gem to RubyGems.org. To allow pushes either set the 'allowed_push_host'
+  # to allow pushing to a single host or delete this section to allow pushing to any host.
+  if spec.respond_to?(:metadata)
+    spec.metadata['allowed_push_host'] = "TODO: Set to 'http://mygemserver.com'"
+  else
+    raise "RubyGems 2.0 or newer is required to protect against " \
+      "public gem pushes."
+  end
+
+  spec.files         = `git ls-files -z`.split("\x0").reject do |f|
+    f.match(%r{^(test|spec|features)/})
+  end
+  spec.bindir        = "exe"
+  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
+  spec.require_paths = ["lib"]
+
+  spec.add_development_dependency "bundler", "~> 1.13"
+  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "minitest", "~> 5.0"
+  spec.add_development_dependency "mime-types", "~> 3"
+end

test/mini_mime_test.rb

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+require 'test_helper'
+
+class MiniMimeTest < Minitest::Test
+  def test_that_it_has_a_version_number
+    refute_nil ::MiniMime::VERSION
+  end
+
+
+  def test_content_type
+    # keep lotus alive cause these files are EVERYWHERE
+    assert_equal "application/vnd.lotus-1-2-3", MiniMime.content_type("a.123")
+    assert_equal "application/x-compress", MiniMime.content_type("a.Z")
+    assert_equal "application/vnd.groove-tool-message", MiniMime.content_type("a.gtm")
+    assert_equal "application/vnd.HandHeld-Entertainment+xml", MiniMime.content_type("a.zmm")
+    assert_nil MiniMime.content_type("a.frog")
+  end
+
+  def test_binary
+    assert MiniMime.binary?("a.Z")
+    refute MiniMime.binary?("a.txt")
+    refute MiniMime.binary?("a.frog")
+  end
+end

test/test_helper.rb

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+$LOAD_PATH.unshift File.expand_path('../../lib', __FILE__)
+require 'mini_mime'
+
+require 'minitest/autorun'