Rewrite HAL links to make them clickable.

Author: dblock

Gemfile

@@ -6,6 +6,7 @@ gem 'rack-cors'
 gem 'grape-swagger'
 gem 'activemodel'
 gem 'kaminari', require: 'kaminari/grape'
+gem 'rack-rewrite'
 
 group :development do
   gem 'rake'

Gemfile.lock

@@ -99,6 +99,7 @@ GEM
     rack-cors (0.4.0)
     rack-mount (0.8.3)
       rack (>= 1.0.0)
+    rack-rewrite (1.4.1)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails-deprecated_sanitizer (1.0.3)
@@ -158,6 +159,7 @@ DEPENDENCIES
   hyperclient
   kaminari
   rack-cors
+  rack-rewrite
   rack-test
   rake
   rspec

app/acme_app.rb

@@ -18,6 +18,11 @@ def self.instance
           end
         end
 
+        # rewrite HAL links to make them clickable in a browser
+        use Rack::Rewrite do
+          r302 %r{^(\/api\/\w*\/)(%7B|\{)?(.*)(%7D|\})$}, '$1'
+        end
+
         run Acme::App.new
       end.to_app
     end

spec/api/root_endpoint_spec.rb

@@ -25,4 +25,9 @@ def app
       expect(JSON.parse(last_response.body)).to_not eq({})
     end
   end
+  it 'rewrites encoded HAL links to make them clickable' do
+    get '/api/splines/%7B?cursor,size%7D'
+    expect(last_response.status).to eq 302
+    expect(last_response.headers['Location']).to eq '/api/splines/'
+  end
 end