Class: Milk::Application

Inherits:
Object show all
Defined in:
lib/milk/application.rb

Constant Summary collapse

PAGE_PATH_REGEX = 
/^\/([a-zA-Z0-9_]+(\/[a-zA-Z0-9_]+)*)+\/*$/
EDIT_PATH_REGEX = 
/^\/([a-zA-Z0-9_]+(\/[a-zA-Z0-9_]+)*)+\/edit\/*$/

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(require_ssl = false) ⇒ Application

Returns a new instance of Application.



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# File 'lib/milk/application.rb', line 9

def initialize(require_ssl=false)
  @require_ssl = require_ssl
end

Instance Attribute Details

#req ⇒ Object (readonly)

Returns the value of attribute req.



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# File 'lib/milk/application.rb', line 7

def req
  @req
end

Class Method Details

.join_tree(obj, parent) ⇒ Object

method that walks an object linking Milk objects to eachother



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# File 'lib/milk/application.rb', line 258

def self.join_tree(obj, parent)
  if [Milk::Page, Milk::Component, Milk::Application].any? {|klass| obj.kind_of? klass}
    obj.parent = parent
    obj.instance_variables.each do |name|
      var = obj.instance_variable_get(name)
      if var.class == Array
        var.each do |subvar|
          join_tree(subvar, obj)
        end
      end
    end
  end
end

Instance Method Details

#call(env) ⇒ Object

Rack call interface



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# File 'lib/milk/application.rb', line 195

def call(env)
  @req = Rack::Request.new(env)
  @resp = Rack::Response.new
  load_user
  
  # Route the request
  @action, page_name, @page = route
  
  # Send proper mime types for browsers that claim to accept it
  @resp["Content-Type"] = 
  if env['HTTP_ACCEPT'].include? "application/xhtml+xml"
    "application/xhtml+xml"
    "text/html"
  else
    "text/html"
  end

  case @action
    when :not_found
      @resp.status = 404
      page = Milk::Page.find('NotFound')
      Milk::Application.join_tree(page, self)
      @action = :view
      @resp.write page.view
    when :view
      Milk::Application.join_tree(@page, self)
      html = @page.view
      @page.save_to_cache(html) if Milk::USE_CACHE
      @resp.write html
    when :https_redirect
      @resp.redirect('https://' +  @req.host + @req.fullpath)
    when :http_redirect
      @resp.redirect('http://' +  @req.host + @req.fullpath)
    when :edit
      Milk::Application.join_tree(@page, self)
      @resp.write @page.edit
    when :save
      Milk::Application.join_tree(@page, self)
      yaml = @page.save
      @page.save_to_cache if Milk::USE_CACHE
      @resp.write yaml
    when :preview
      Milk::Application.join_tree(@page, self)
      @resp.write @page.preview
    when :login_form
      @resp.write(haml("login"))
    when :login
      
    when :logout
      logout
    when :form_submit
      form_submit
    when :access_denied
      @resp.staus = 403
      @resp.write "Access Denied"
    else
      @resp.status = 500
      @resp.write @action.to_s
  end
  @resp.finish
end

#decode(code) ⇒ Object 



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# File 'lib/milk/application.rb', line 91

def decode(code)
  require 'base64'
  len = Milk::SECRET.length
  value = Base64.decode64(code)
  result = (0...value.length).collect { |i| value[i].ord ^ Milk::SECRET[i%len].ord }
  result.pack("C*")
end

#encode(value) ⇒ Object 



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# File 'lib/milk/application.rb', line 84

def encode(value)
  require 'base64'
  len = Milk::SECRET.length
  result = (0...value.length).collect { |i| value[i].ord ^ Milk::SECRET[i%len].ord }
  Base64.encode64(result.pack("C*"))
end

#flash(message = nil) ⇒ Object 



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# File 'lib/milk/application.rb', line 136

def flash(message=nil)
  @resp.delete_cookie('flash', :path => "/") unless message
  @resp.set_cookie('flash', :path => "/", :value => message) if message
  @req.cookies['flash']
end

#form_submit ⇒ Object 



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# File 'lib/milk/application.rb', line 118

def form_submit
  instr = eval(decode(@req.params['instructions']))
  p = @req.params.reject { |k,v| k == 'instructions'}
  print instr.inspect+"\n"
  print instr[:sendto].inspect+"\n"
  print instr[:sendto].split(' ').inspect+"\n"
  instr[:sendto].split(' ').each do |email|
    continue unless u = USERS[email]
    send_email("milk@#{@req.host}", "Milk Server at #{@req.host}", email, u[:name], "Someone messaged you from #{@req.referer}", YAML.dump(p))
  end
  @resp.redirect(instr[:dest])
end

#hash(email, password) ⇒ Object 



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# File 'lib/milk/application.rb', line 99

def hash(email, password)
  require 'digest/md5'
  Digest::MD5.hexdigest("#{password}")
end

#load_deps(list, target) ⇒ Object 



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# File 'lib/milk/application.rb', line 182

def load_deps(list, target)
  return list unless DEPENDENCY_TREE[target]
  DEPENDENCY_TREE[target].each do |more|
    if more.class == Symbol
      load_deps(list, more)
    else
      list << more
    end
  end
end

#load_user ⇒ Object 



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# File 'lib/milk/application.rb', line 163

def load_user
  @user = nil
  if current = @req.cookies['auth']
    email = decode(current)
    @user = USERS[email]
    @resp.delete_cookie('auth', :path => "/") unless @user
  end
end

#login ⇒ Object 



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# File 'lib/milk/application.rb', line 142

def 
  email = @req.params['email']
  if email.length > 0
    user = USERS[email]
    if user
      expected = user[:hash]
      actual = hash(email, @req.params['password'])
      if actual == expected
        @resp.set_cookie('auth', :path => "/", :value => encode(email), :secure=>@require_ssl, :httponly=>true)
      else
        flash "Incorrect password for user #{email}"
      end
    else
      flash "User #{email} not found"
    end
  else
    flash "Please enter user email and password"
  end
  @resp.redirect(@req.params['dest'])
end

#logout ⇒ Object 



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# File 'lib/milk/application.rb', line 131

def logout
  @resp.delete_cookie('auth', :path => "/")
  @resp.redirect(@req.params['dest'])
end

#render_dependencies(deps = []) ⇒ Object 



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# File 'lib/milk/application.rb', line 172

def render_dependencies(deps=[])
  deps << @action
  list = []
  deps.each do |target|
    load_deps(list, target)
  end
  list.uniq!
  haml("dependencies", :list => list)
end

#route ⇒ Object 



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# File 'lib/milk/application.rb', line 13

def route
  path = @req.path_info
  
  if path == '/'
    # Special case for root
    path = '/Home'
  end
  
  # Fallback to match everything
  regex = /(.*)/
  
  # Route the request to the right callback
  https = @req.env['HTTPS'] == 'on'
  action = case 
    when @req.get?
      case
        when path == "/logout"
          :logout
        when path =~ EDIT_PATH_REGEX
          regex = EDIT_PATH_REGEX
          if @require_ssl && !https
            :https_redirect
          else
            :edit
          end
        when path =~ PAGE_PATH_REGEX
          regex = PAGE_PATH_REGEX
          :view
      end
    when @req.delete?
      if path =~ PAGE_PATH_REGEX
        regex = PAGE_PATH_REGEX
        :delete
      end
    when @req.post?
      if path == '/login'
        :login
      elsif path == '/form_submit'
        :form_submit
      elsif path =~ PAGE_PATH_REGEX
        regex = PAGE_PATH_REGEX
        :preview
      end
    when @req.put?
      if path =~ PAGE_PATH_REGEX
        regex = PAGE_PATH_REGEX
        :save
      end
  end || :not_found
  
  page_name = regex.match(path)[1]
  
  if (action == :view || action == :edit)
    begin 
      page = Milk::Page.find(page_name)
    rescue Milk::PageNotFoundError
      action = :not_found
    end
  end

  if (action == :preview || action == :save)
    page = Milk::Page.json_unserialize(YAML.load(@req.body.read), page_name)
  end
  
  if !@user && [:edit, :save, :delete].include?(action)
    action = :login_form
  end

  return action, page_name, page
end

#send_email(from, from_alias, to, to_alias, subject, message) ⇒ Object 



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# File 'lib/milk/application.rb', line 104

def send_email(from, from_alias, to, to_alias, subject, message)
 msg = <<END_OF_MESSAGE
From: #{from_alias} <#{from}>
To: #{to_alias} <#{to}>
Subject: #{subject}

#{message}
END_OF_MESSAGE
  require 'net/smtp'	
 Net::SMTP.start('localhost') do |smtp|
  smtp.send_message msg, from, to
 end
end