Added support for regex in path spec. Supports adding :captures path_info element for any capture groups

Author: rfestag

lib/webmachine/dispatcher/route.rb

@@ -119,6 +119,13 @@ def bind(tokens, bindings)
             return [depth, tokens]
           when tokens.empty?
             return false
+          when Regexp === spec.first
+            matches = spec.first.match URI.decode(tokens.first)
+            if matches
+              bindings[:captures] = (bindings[:captures] || []) + matches.captures
+            else
+              return false
+            end
           when Symbol === spec.first
             bindings[spec.first] = URI.decode(tokens.first)
           when spec.first == tokens.first

spec/webmachine/dispatcher/route_spec.rb

@@ -180,7 +180,6 @@ def call(request)
         end
       end
     end
-
     context "on a deep path" do
       subject { described_class.new(%w{foo bar baz}, resource) }
       let(:uri) { URI.parse("http://localhost:8080/foo/bar/baz") }
@@ -205,6 +204,21 @@ def call(request)
           expect(request.path_info).to eq({:id => "bar"})
         end
       end
+      context "with regex" do
+        subject { described_class.new([/foo/, /(.*)/, 'baz'], resource) }
+
+        it "should assign the captures path variables" do
+          expect(request.path_info).to eq({:captures => ["bar"]})
+        end
+      end
+      context "with multi-capture regex" do
+        subject { described_class.new([/foo/, /(.*)/, /baz\.(.*)/], resource) }
+        let(:uri) { URI.parse("http://localhost:8080/foo/bar/baz.json") }
+
+        it "should assign the captures path variables" do
+          expect(request.path_info).to eq({:captures => ["bar", "json"]})
+        end
+      end
 
       context "with a splat" do
         subject { described_class.new(['foo', :*], resource) }

spec/webmachine/dispatcher_spec.rb

@@ -3,6 +3,7 @@
 describe Webmachine::Dispatcher do
   let(:dispatcher) { Webmachine.application.dispatcher }
   let(:request) { Webmachine::Request.new("GET", URI.parse("http://localhost:8080/"), Webmachine::Headers["accept" => "*/*"], "") }
+  let(:request2) { Webmachine::Request.new("GET", URI.parse("http://localhost:8080/hello/bob.html"), Webmachine::Headers["accept" => "*/*"], "") }
   let(:response) { Webmachine::Response.new }
   let(:resource) do
     Class.new(Webmachine::Resource) do
@@ -14,6 +15,14 @@ def to_html; "hello world!"; end
       def to_html; "goodbye, cruel world"; end
     end
   end
+  let(:resource3) do
+    Class.new(Webmachine::Resource) do
+      def to_html
+        name, format = request.path_info[:captures]
+        "Hello #{name} with #{format}"
+      end
+    end
+  end
   let(:fsm){ double }
 
   before { dispatcher.reset }
@@ -44,6 +53,12 @@ def to_html; "goodbye, cruel world"; end
     expect(fsm).to receive(:run)
     dispatcher.dispatch(request, response)
   end
+  it "should handle regex path segments in route definition" do
+    dispatcher.add_route ["hello", /(.*)\.(.*)/], resource3
+    expect(Webmachine::Decision::FSM).to receive(:new).with(instance_of(resource3), request2, response).and_return(fsm)
+    expect(fsm).to receive(:run)
+    dispatcher.dispatch(request2, response)
+  end
 
   it "should apply route to request before creating the resource" do
     route   = dispatcher.add_route [:*], resource