Class: Webmachine::Dispatcher::Route

Inherits:
Object
  • Object
show all
Includes:
Translation
Defined in:
lib/webmachine/dispatcher/route.rb

Overview

Pairs URIs with Resource classes in the Webmachine::Dispatcher. To create routes, use #add_route.

Constant Summary collapse

MATCH_ALL =

When used in a path specification, will match all remaining segments

'*'.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Translation

#t

Constructor Details

#initialize(path_spec, *guards, resource, bindings = {}) {|req| ... } ⇒ Route

Creates a new Route that will associate a pattern to a Resource.

Examples:

Standard route

Route.new(["*"], MyResource)

Guarded route

Route.new ["/notes"],
  ->(request) { request.method == "POST" },
  Resources::Note
Route.new ["/notes"], Resources::NoteList
Route.new ["/notes", :id], Resources::Note
Route.new ["/notes"], Resources::Note do |req|
  req.query['foo']
end

Parameters:

  • path_spec (Array<String|Symbol>) —

    a list of path segments (String) and identifiers (Symbol) to bind. Strings will be simply matched for equality. Symbols in the path spec will be extracted into Request#path_info for use inside your Resource. The special segment MATCH_ALL will match all remaining segments.

  • guards (Proc) —

    optional guard blocks called with the request.

  • resource (Class) —

    the Resource to dispatch to

  • bindings (Hash) (defaults to: {}) —

    additional information to add to Request#path_info when this route matches

Yields:

  • (req) —

    an optional guard block

Yield Parameters:

  • req (Request) —

    the request object

Raises:

  • (ArgumentError)

See Also:



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# File 'lib/webmachine/dispatcher/route.rb', line 57

def initialize(path_spec, *args)
  if args.last.is_a? Hash
    bindings = args.pop
  else
    bindings = {}
  end

  resource = args.pop
  guards = args
  guards << Proc.new if block_given?

  @path_spec = path_spec
  @guards    = guards
  @resource  = resource
  @bindings  =  bindings

  raise ArgumentError, t('not_resource_class', :class => resource.name) unless resource < Resource
end

Instance Attribute Details

#guards ⇒ Array<Proc> (readonly)

Returns the list of guard blocks used to define this route (see #initialize).

Returns:

  • (Array<Proc>) —

    the list of guard blocks used to define this route (see #initialize).



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# File 'lib/webmachine/dispatcher/route.rb', line 21

def guards
  @guards
end

#path_spec ⇒ Array<String|Symbol> (readonly)

Returns the list of path segments used to define this route (see #initialize).

Returns:

  • (Array<String|Symbol>) —

    the list of path segments used to define this route (see #initialize).



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# File 'lib/webmachine/dispatcher/route.rb', line 17

def path_spec
  @path_spec
end

#resource ⇒ Class (readonly)

Returns the resource this route will dispatch to, a subclass of Resource.

Returns:

  • (Class) —

    the resource this route will dispatch to, a subclass of Resource



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# File 'lib/webmachine/dispatcher/route.rb', line 13

def resource
  @resource
end

Instance Method Details

#apply(request) ⇒ Object

Decorates the request with information about the dispatch route, including path bindings.

Parameters:

  • request (Request) —

    the request object



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# File 'lib/webmachine/dispatcher/route.rb', line 87

def apply(request)
  request.disp_path = request.uri.path.match(/^\/(.*)/)[1]
  request.path_info = @bindings.dup
  tokens = request.disp_path.split('/')
  depth, trailing = bind(tokens, request.path_info)
  request.path_tokens = trailing || []
end

#match?(request) ⇒ Boolean

Determines whether the given request matches this route and should be dispatched to the #resource.

Parameters:

  • request (Reqeust) —

    the request object

Returns:

  • (Boolean) 


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# File 'lib/webmachine/dispatcher/route.rb', line 79

def match?(request)
  tokens = request.uri.path.match(/^\/(.*)/)[1].split('/')
  bind(tokens, {}) && guards.all? { |guard| guard.call(request) }
end