Check Null values in Labels

Author: phnx47

examples/WebApiApplication/WebApiApplication.csproj

@@ -47,8 +47,8 @@
       <HintPath>..\..\packages\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.1.0.3\lib\net45\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.dll</HintPath>
     </Reference>
     <Reference Include="Microsoft.CSharp" />
-    <Reference Include="protobuf-net, Version=2.1.0.0, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
-      <HintPath>..\..\packages\protobuf-net.2.1.0\lib\net451\protobuf-net.dll</HintPath>
+    <Reference Include="protobuf-net, Version=2.2.1.0, Culture=neutral, PublicKeyToken=257b51d87d2e4d67, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\protobuf-net.2.2.1\lib\net40\protobuf-net.dll</HintPath>
     </Reference>
     <Reference Include="System.Net.Http" />
     <Reference Include="System.Web.DynamicData" />

examples/WebApiApplication/packages.config

@@ -7,5 +7,5 @@
   <package id="Microsoft.CodeDom.Providers.DotNetCompilerPlatform" version="1.0.3" targetFramework="net452" />
   <package id="Microsoft.Net.Compilers" version="1.3.2" targetFramework="net452" developmentDependency="true" />
   <package id="Newtonsoft.Json" version="6.0.4" targetFramework="net452" />
-  <package id="protobuf-net" version="2.1.0" targetFramework="net452" />
+  <package id="protobuf-net" version="2.2.1" targetFramework="net452" />
 </packages>

src/Prometheus.Client/Collectors/Collector.cs

@@ -14,10 +14,12 @@ namespace Prometheus.Client.Collectors
         private readonly string _help;
         private readonly Lazy<T> _unlabelledLazy;
 
+        // ReSharper disable StaticFieldInGenericType
         private static readonly Regex MetricName = new Regex(MetricNameRe);
         private static readonly Regex LabelNameRegex = new Regex("^[a-zA-Z_:][a-zA-Z0-9_:]*$");
         private static readonly Regex ReservedLabelRegex = new Regex("^__.*$");
         private static readonly LabelValues EmptyLabelValues = new LabelValues(new string[0], new string[0]);
+        // ReSharper restore StaticFieldInGenericType
 
         protected abstract MetricType Type { get; }
 

src/Prometheus.Client/Collectors/DotNetStatsCollector.cs

@@ -19,15 +19,14 @@ public class DotNetStatsCollector : IOnDemandCollector
 
 
         /// <summary>
-        /// Constructors
+        ///     Constructors
         /// </summary>
         public DotNetStatsCollector()
         {
             _process = Process.GetCurrentProcess();
         }
 
         /// <inheritdoc />
-       
         public void RegisterMetrics()
         {
             _perfErrors = Metrics.CreateCounter("dotnet_collection_errors_total", "Total number of errors that occured during collections");
@@ -43,7 +42,6 @@ public void RegisterMetrics()
 
             // .net specific metrics
             _totalMemory = Metrics.CreateGauge("dotnet_totalmemory", "Total known allocated memory");
-            
 
             var epoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
             _startTime.Set((_process.StartTime.ToUniversalTime() - epoch).TotalSeconds);

src/Prometheus.Client/Internal/LabelValues.cs

@@ -11,25 +11,39 @@ public class LabelValues
         private readonly string[] _values;
         internal readonly List<LabelPair> WireLabels = new List<LabelPair>();
 
-
-        public LabelValues(IReadOnlyCollection<string> names, string[] values)
+        public LabelValues(IReadOnlyCollection<string> names, IReadOnlyList<string> values)
         {
-            if (names.Count != values.Length)
+            if (values == null)
+                throw new InvalidOperationException("Label values is null");
+
+            if (names.Count != values.Count)
                 throw new InvalidOperationException("Label values must be of same length as label names");
-            _values = values;
-            WireLabels.AddRange(names.Zip(values, (s, s1) => new LabelPair {name = s, value = s1}));
+
+            _values = new string[values.Count];
+            for (var i = 0; i < values.Count; i++)
+                _values[i] = values[i] ?? "";
+
+            WireLabels.AddRange(names.Zip(values, (s, s1) => new LabelPair { name = s, value = s1 }));
         }
 
 
         public override bool Equals(object obj)
         {
-            if (ReferenceEquals(null, obj)) return false;
-            if (ReferenceEquals(this, obj)) return true;
-            if (obj.GetType() != GetType()) return false;
-            var other = (LabelValues) obj;
+            if (ReferenceEquals(null, obj))
+                return false;
+
+            if (ReferenceEquals(this, obj))
+                return true;
+
+            if (obj.GetType() != GetType())
+                return false;
+
+            var labelValues = (LabelValues)obj;
+
+            if (labelValues._values.Length != _values.Length)
+                return false;
 
-            if (other._values.Length != _values.Length) return false;
-            return !_values.Where((t, i) => t != other._values[i]).Any();
+            return !_values.Where((t, i) => t != labelValues._values[i]).Any();
         }
 
         public override int GetHashCode()

src/Prometheus.Client/Prometheus.Client.csproj

@@ -1,10 +1,10 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <Description>.NET client for prometheus.io. Fork of prometheus-net</Description>
+    <Description>.NET client for prometheus.io.</Description>
     <Copyright>2017 © Sergey Kuznetsov</Copyright>
     <AssemblyTitle>Prometheus.Client</AssemblyTitle>
-    <VersionPrefix>1.1.0</VersionPrefix>
+    <VersionPrefix>1.1.1</VersionPrefix>
     <Authors>Sergey Kuznetsov</Authors>
     <TargetFrameworks>net45;netstandard1.3</TargetFrameworks>
     <AssemblyName>Prometheus.Client</AssemblyName>
@@ -18,7 +18,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="protobuf-net" Version="2.1.0" />
+    <PackageReference Include="protobuf-net" Version="2.2.1" />
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'net45' ">

test/Prometheus.Client.Tests/MetricsTests.cs

@@ -39,6 +39,24 @@ public void Api_Usage()
             Assert.Equal(4.4, counter.Labels("a").Value);
         }
 
+        [Fact]
+        public void Null_Labels()
+        {
+            var counter = Metrics.CreateCounter("name2", "help2", "label1", "label2");
+
+            try
+            {
+                counter.Labels(null).Inc();
+                Assert.True(false);
+            }
+            catch (InvalidOperationException)
+            {
+
+            }
+
+            counter.Labels("param1", null).Inc(); // not down
+        }
+
         [Fact]
         public void Cannot_Create_Metrics_With_The_Same_Name_But_Different_Labels()
         {

test/Prometheus.Client.Tests/Prometheus.Client.Tests.csproj

@@ -21,4 +21,8 @@
     <ProjectReference Include="..\..\src\Prometheus.Client\Prometheus.Client.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Service Include="{82a7f48d-3b50-4b1e-b82e-3ada8210c358}" />
+  </ItemGroup>
+
 </Project>