Class: HttpRouter

Inherits:
Object
  • Object
show all
Defined in:
lib/http_router/version.rb,
lib/http_router.rb,
lib/http_router/node.rb,
lib/http_router/rack.rb,
lib/http_router/util.rb,
lib/http_router/route.rb,
lib/http_router/request.rb,
lib/http_router/response.rb,
lib/http_router/node/glob.rb,
lib/http_router/node/path.rb,
lib/http_router/node/root.rb,
lib/http_router/node/regex.rb,
lib/http_router/node/lookup.rb,
lib/http_router/regex_route.rb,
lib/http_router/node/request.rb,
lib/http_router/rack/url_map.rb,
lib/http_router/node/variable.rb,
lib/http_router/node/arbitrary.rb,
lib/http_router/node/free_regex.rb,
lib/http_router/node/glob_regex.rb,
lib/http_router/node/spanning_regex.rb

Overview

:nodoc

Defined Under Namespace

Modules: Rack, Util Classes: Node, RegexRoute, Request, Response, Route

Constant Summary collapse

InvalidRouteException =

Raised when a url is not able to be generated for the given parameters

Class.new(RuntimeError)
MissingParameterException =

Raised when a Route is not able to be generated due to a missing parameter.

Class.new(RuntimeError)
DoubleCompileError =

Raised when a Route is compiled twice

Class.new(RuntimeError)
InvalidRequestValueError =

Raised an invalid request value is used

Class.new(RuntimeError)
VERSION = 
'0.9.6'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args, &blk) ⇒ HttpRouter

Creates a new HttpRouter. Can be called with either HttpRouter.new(proc{|env| ... }, { .. options .. }) or with the first argument omitted. If there is a proc first, then it’s used as the default app in the case of a non-match. Supported options are

  • :default_app – Default application used if there is a non-match on #call. Defaults to 404 generator.

  • :ignore_trailing_slash – Ignore a trailing / when attempting to match. Defaults to true.

  • :redirect_trailing_slash – On trailing /, redirect to the same path without the /. Defaults to false.

  • :known_methods – Array of http methods tested for 405s.



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# File 'lib/http_router.rb', line 36

def initialize(*args, &blk)
  default_app, options     = args.first.is_a?(Hash) ? [nil, args.first] : [args.first, args[1]]
  @options = options
  @default_app             = default_app || options && options[:default_app] || proc{|env| ::Rack::Response.new("Not Found", 404, {'X-Cascade' => 'pass'}).finish }
  @ignore_trailing_slash   = options && options.key?(:ignore_trailing_slash) ? options[:ignore_trailing_slash] : true
  @redirect_trailing_slash = options && options.key?(:redirect_trailing_slash) ? options[:redirect_trailing_slash] : false
  @known_methods           = Set.new(options && options[:known_methods] || [])
  reset!
  instance_eval(&blk) if blk
end

Instance Attribute Details

#default_app ⇒ Object

Returns the value of attribute default_app.



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# File 'lib/http_router.rb', line 17

def default_app
  @default_app
end

#known_methods ⇒ Object (readonly)

Returns the value of attribute known_methods.



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# File 'lib/http_router.rb', line 16

def known_methods
  @known_methods
end

#named_routes ⇒ Object (readonly)

Returns the value of attribute named_routes.



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# File 'lib/http_router.rb', line 16

def named_routes
  @named_routes
end

#nodes ⇒ Object (readonly)

Returns the value of attribute nodes.



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# File 'lib/http_router.rb', line 16

def nodes
  @nodes
end

#root ⇒ Object (readonly)

Returns the value of attribute root.



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# File 'lib/http_router.rb', line 16

def root
  @root
end

#routes ⇒ Object (readonly)

Returns the value of attribute routes.



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# File 'lib/http_router.rb', line 16

def routes
  @routes
end

#url_mount ⇒ Object

Returns the value of attribute url_mount.



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# File 'lib/http_router.rb', line 17

def url_mount
  @url_mount
end

Instance Method Details

#add(*args, &app) ⇒ Object

Adds a path to be recognized.

To assign a part of the path to a specific variable, use :variable_name within the route. For example, add('/path/:id') would match /path/test, with the variable :id having the value "test".

You can receive mulitple parts into a single variable by using the glob syntax. For example, add('/path/*id') would match /path/123/456/789, with the variable :id having the value ["123", "456", "789"].

As well, paths can end with two optional parts, * and /?. If it ends with a *, it will match partially, returning the part of the path unmatched in the PATH_INFO value of the env. The part matched to will be returned in the SCRIPT_NAME. If it ends with /?, then a trailing / on the path will be optionally matched for that specific route. As trailing /‘s are ignored by default, you probably don’t actually want to use this option that frequently.

Routes can also contain optional parts. There are surrounded with ( )‘s. If you need to match on a bracket in the route itself, you can escape the parentheses with a backslash.

As well, options can be passed in that modify the route in further ways. See HttpRouter::Route#with_options for details. Typically, you want to add further options to the route by calling additional methods on it. See HttpRouter::Route for further details.

Returns the route object.



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# File 'lib/http_router.rb', line 62

def add(*args, &app)
  opts = args.last.is_a?(Hash) ? args.pop : {}
  path = args.first
  route = add_route((Regexp === path ? RegexRoute : Route).new(self, path, opts))
  route.to(app) if app
  route
end

#add_route(route) ⇒ Object 



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# File 'lib/http_router.rb', line 70

def add_route(route)
  @routes << route
  route
end

#call(env, perform_call = true) ⇒ Object

Rack compatible #call. If matching route is found, and dest value responds to #call, processing will pass to the matched route. Otherwise, the default application will be called. The router will be available in the env under the key router. And parameters matched will be available under the key router.params.



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# File 'lib/http_router.rb', line 113

def call(env, perform_call = true)
  rack_request = ::Rack::Request.new(env)
  request = Request.new(rack_request.path_info, rack_request, perform_call)
  response = catch(:success) { @root[request] }
  if response
    response
  elsif response.nil?
    no_response(env, perform_call)
  elsif perform_call
    @default_app.call(env)
  else
    nil
  end
end

#clone(klass = self.class) ⇒ Object

Creates a deep-copy of the router.



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# File 'lib/http_router.rb', line 183

def clone(klass = self.class)
  cloned_router = klass.new(@options)
  @routes.each do |route|
    new_route = route.clone(cloned_router)
    cloned_router.add_route(new_route)
    new_route.name(route.named) if route.named
    begin
      new_route.to route.dest.clone
    rescue
      new_route.to route.dest
    end
  end
  cloned_router
end

#default(app) ⇒ Object

Assigns the default application.



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# File 'lib/http_router.rb', line 135

def default(app)
  @default_app = app
end

#delete(path, opts = {}, &app) ⇒ Object

Adds a path that only responds to the request method DELETE.

Returns the route object.



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# File 'lib/http_router.rb', line 93

def delete(path, opts = {}, &app); add_with_request_method(path, :delete, opts, &app); end

#get(path, opts = {}, &app) ⇒ Object

Adds a path that only responds to the request method GET.

Returns the route object.



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# File 'lib/http_router.rb', line 78

def get(path, opts = {}, &app); add_with_request_method(path, :get, opts, &app); end

#head(path, opts = {}, &app) ⇒ Object

Adds a path that only responds to the request method HEAD.

Returns the route object.



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# File 'lib/http_router.rb', line 88

def head(path, opts = {}, &app); add_with_request_method(path, :head, opts, &app); end

#ignore_trailing_slash? ⇒ Boolean

Ignore trailing slash feature enabled? See #initialize for details.

Returns:

  • (Boolean) 


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# File 'lib/http_router.rb', line 173

def ignore_trailing_slash?
  @ignore_trailing_slash
end

#inspect ⇒ Object 



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# File 'lib/http_router.rb', line 224

def inspect
  head = to_s
  "#{to_s}\n#{'=' * head.size}\n#{@root.inspect}"
end

#no_response(env, perform_call = true) ⇒ Object 



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# File 'lib/http_router.rb', line 208

def no_response(env, perform_call = true)
  supported_methods = @known_methods.select do |m|
    next if m == env['REQUEST_METHOD']
    test_env = ::Rack::Request.new(env.clone)
    test_env.env['REQUEST_METHOD'] = m
    test_env.env['_HTTP_ROUTER_405_TESTING_ACCEPTANCE'] = true
    test_request = Request.new(test_env.path_info, test_env, 405)
    catch(:success) { @root[test_request] }
  end
  supported_methods.empty? ? (perform_call ? @default_app.call(env) : nil) : [405, {'Allow' => supported_methods.sort.join(", ")}, []]
end

#options(path, opts = {}, &app) ⇒ Object

Adds a path that only responds to the request method OPTIONS.

Returns the route object.



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# File 'lib/http_router.rb', line 103

def options(path, opts = {}, &app); add_with_request_method(path, :options, opts, &app); end

#pass_on_response(response) ⇒ Object

This method defines what sort of responses are considered “passes”, and thus, route processing will continue. Override it to implement custom passing.



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# File 'lib/http_router.rb', line 168

def pass_on_response(response)
  response[1]['X-Cascade'] == 'pass'
end

#post(path, opts = {}, &app) ⇒ Object

Adds a path that only responds to the request method POST.

Returns the route object.



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# File 'lib/http_router.rb', line 83

def post(path, opts = {}, &app); add_with_request_method(path, :post, opts, &app); end

#process_destination_path(path, env) ⇒ Object

This method is invoked when a Path object gets called with an env. Override it to implement custom path processing.



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# File 'lib/http_router.rb', line 162

def process_destination_path(path, env)
  path.route.dest.call(env)
end

#put(path, opts = {}, &app) ⇒ Object

Adds a path that only responds to the request method PUT.

Returns the route object.



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# File 'lib/http_router.rb', line 98

def put(path, opts = {}, &app); add_with_request_method(path, :put, opts, &app); end

#recognize(env) ⇒ Object

Performs recoginition without actually calling the application.



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# File 'lib/http_router.rb', line 106

def recognize(env)
  call(env, false)
end

#redirect_trailing_slash? ⇒ Boolean

Redirect trailing slash feature enabled? See #initialize for details.

Returns:

  • (Boolean) 


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# File 'lib/http_router.rb', line 178

def redirect_trailing_slash?
  @redirect_trailing_slash
end

#reset! ⇒ Object

Resets the router to a clean state.



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# File 'lib/http_router.rb', line 129

def reset!
  @routes, @named_routes, @root = [], Hash.new{|h,k| h[k] = []}, Node::Root.new(self)
  @default_app = Proc.new{ |env| ::Rack::Response.new("Your request couldn't be found", 404).finish }
end

#rewrite_partial_path_info(env, request) ⇒ Object 



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# File 'lib/http_router.rb', line 198

def rewrite_partial_path_info(env, request)
  env['PATH_INFO'] = "/#{request.path.join('/')}"
  env['SCRIPT_NAME'] += request.rack_request.path_info[0, request.rack_request.path_info.size - env['PATH_INFO'].size]
end

#rewrite_path_info(env, request) ⇒ Object 



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# File 'lib/http_router.rb', line 203

def rewrite_path_info(env, request)
  env['SCRIPT_NAME'] += request.rack_request.path_info
  env['PATH_INFO'] = ''
end

#to_s ⇒ Object 



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# File 'lib/http_router.rb', line 220

def to_s
  "#<HttpRouter:0x#{object_id.to_s(16)} number of routes (#{routes.size}) ignore_trailing_slash? (#{ignore_trailing_slash?}) redirect_trailing_slash? (#{redirect_trailing_slash?}) known_methods (#{known_methods.to_a.join(', ')})>"
end

#url(route, *args) ⇒ Object

Generate a URL for a specified route. This will accept a list of variable values plus any other variable names named as a hash. This first value must be either the Route object or the name of the route.

Example:

router = HttpRouter.new
router.add('/:foo.:format').name(:test).to{|env| [200, {}, []]}
router.url(:test, 123, 'html')
# ==> "/123.html"
router.url(:test, 123, :format => 'html')
# ==> "/123.html"
router.url(:test, :foo => 123, :format => 'html')
# ==> "/123.html"
router.url(:test, :foo => 123, :format => 'html', :fun => 'inthesun')
# ==> "/123.html?fun=inthesun"

Raises:



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# File 'lib/http_router.rb', line 153

def url(route, *args)
  case route
  when Symbol then @named_routes.key?(route) && @named_routes[route].each{|r| url = r.url(*args); return url if url}
  when Route  then return route.url(*args)
  end
  raise(InvalidRouteException)
end