(MAINT) Normalise all tokens for stats

/api/v1/token, /token, /img and /lib endpoints need to be normalised the
same way that /vm and /ondemandvm endpoints are handled.

lib/vmpooler/metrics/promstats/collector_middleware.rb

@@ -114,6 +114,9 @@ module Vmpooler
           path
             .gsub(%r{/vm/.+$}, '/vm')
             .gsub(%r{/ondemand/.+$}, '/ondemand')
+            .gsub(%r{/token/.+$}, '/token')
+            .gsub(%r{/lib/.+$}, '/lib')
+            .gsub(%r{/img/.+$}, '/img')
         end
       end
     end

spec/unit/collector_middleware_spec.rb

@@ -55,7 +55,7 @@ describe Vmpooler::Metrics::Promstats::CollectorMiddleware do
     expect(registry.get(metric).get(labels: labels)).to include("0.1" => 0, "0.25" => 1)
   end
 
-  it 'normalizes paths cotaining /vm by default' do
+  it 'normalizes paths containing /vm by default' do
     expect(Benchmark).to receive(:realtime).and_yield.and_return(0.3)
 
     get '/foo/vm/bar-mumble-flame'
@@ -83,6 +83,62 @@ describe Vmpooler::Metrics::Promstats::CollectorMiddleware do
     expect(registry.get(metric).get(labels: labels)).to include("0.1" => 0, "0.5" => 1)
   end
 
+  it 'normalizes paths containing /token by default' do
+    expect(Benchmark).to receive(:realtime).and_yield.and_return(0.3)
+
+    get '/token/secret-token-name'
+
+    metric = :http_server_requests_total
+    labels = { method: 'get', path: '/token', code: '200' }
+    expect(registry.get(metric).get(labels: labels)).to eql(1.0)
+
+    metric = :http_server_request_duration_seconds
+    labels = { method: 'get', path: '/token' }
+    expect(registry.get(metric).get(labels: labels)).to include("0.1" => 0, "0.5" => 1)
+  end
+
+  it 'normalizes paths containing /api/v1/token by default' do
+    expect(Benchmark).to receive(:realtime).and_yield.and_return(0.3)
+
+    get '/api/v1/token/secret-token-name'
+
+    metric = :http_server_requests_total
+    labels = { method: 'get', path: '/api/v1/token', code: '200' }
+    expect(registry.get(metric).get(labels: labels)).to eql(1.0)
+
+    metric = :http_server_request_duration_seconds
+    labels = { method: 'get', path: '/api/v1/token' }
+    expect(registry.get(metric).get(labels: labels)).to include("0.1" => 0, "0.5" => 1)
+  end
+
+  it 'normalizes paths containing /img by default' do
+    expect(Benchmark).to receive(:realtime).and_yield.and_return(0.3)
+
+    get '/img/image-name'
+
+    metric = :http_server_requests_total
+    labels = { method: 'get', path: '/img', code: '200' }
+    expect(registry.get(metric).get(labels: labels)).to eql(1.0)
+
+    metric = :http_server_request_duration_seconds
+    labels = { method: 'get', path: '/img' }
+    expect(registry.get(metric).get(labels: labels)).to include("0.1" => 0, "0.5" => 1)
+  end
+
+  it 'normalizes paths containing /lib by default' do
+    expect(Benchmark).to receive(:realtime).and_yield.and_return(0.3)
+
+    get '/lib/xxxxx.js'
+
+    metric = :http_server_requests_total
+    labels = { method: 'get', path: '/lib', code: '200' }
+    expect(registry.get(metric).get(labels: labels)).to eql(1.0)
+
+    metric = :http_server_request_duration_seconds
+    labels = { method: 'get', path: '/lib' }
+    expect(registry.get(metric).get(labels: labels)).to include("0.1" => 0, "0.5" => 1)
+  end
+
   context 'when the app raises an exception' do
     let(:original_app) do
       lambda do |env|