add Router.all() method

Similar to app.all() but specifically for attaching handlers to all
methods under a standalone router. This is useful for isolating routers
that require "middleware" like features for all routes managed by the
router.

lib/router/index.js

@@ -302,6 +302,15 @@ Router.prototype.route = function(method, path, callbacks){
   return this;
 };
 
+Router.prototype.all = function(path) {
+  var self = this;
+  var args = [].slice.call(arguments);
+  methods.forEach(function(method){
+      self.route.apply(self, [method].concat(args));
+  });
+  return this;
+};
+
 methods.forEach(function(method){
   Router.prototype[method] = function(path){
     var args = [method].concat([].slice.call(arguments));

test/Router.js

@@ -2,6 +2,7 @@
 var express = require('../')
   , Router = express.Router
   , request = require('./support/http')
+  , methods = require('methods')
   , assert = require('assert');
 
 describe('Router', function(){
@@ -100,4 +101,21 @@ describe('Router', function(){
       router.route('get', '/foo', function(){}, function(){});
     })
   })
+
+  describe('.all', function() {
+    it('should support using .all to capture all http verbs', function() {
+      var router = new Router();
+
+      router.all('/foo', function(){});
+
+      var url = '/foo?bar=baz';
+
+      methods.forEach(function testMethod(method) {
+        var route = router.match(method, url);
+        route.constructor.name.should.equal('Route');
+        route.method.should.equal(method);
+        route.path.should.equal('/foo');
+      });
+    })
+  })
 })