chore: Add User-Agent HTTP header to Docker.DotNet client (#970)

Co-authored-by: Andre Hofmeister <9199345+HofmeisterAn@users.noreply.github.com>

Author: eddumelendez

src/Testcontainers/Clients/DefaultLabels.cs

@@ -2,7 +2,6 @@ namespace DotNet.Testcontainers.Clients
 {
   using System.Collections.Generic;
   using System.Collections.ObjectModel;
-  using System.Reflection;
   using DotNet.Testcontainers.Containers;
 
   internal sealed class DefaultLabels : ReadOnlyDictionary<string, string>
@@ -16,7 +15,7 @@ private DefaultLabels()
       {
         { TestcontainersClient.TestcontainersLabel, bool.TrueString.ToLowerInvariant() },
         { TestcontainersClient.TestcontainersLangLabel, "dotnet" },
-        { TestcontainersClient.TestcontainersVersionLabel, typeof(DefaultLabels).Assembly.GetCustomAttribute<AssemblyInformationalVersionAttribute>().InformationalVersion },
+        { TestcontainersClient.TestcontainersVersionLabel, TestcontainersClient.Version },
         { TestcontainersClient.TestcontainersSessionIdLabel, ResourceReaper.DefaultSessionId.ToString("D") },
         { ResourceReaper.ResourceReaperSessionLabel, ResourceReaper.DefaultSessionId.ToString("D") },
       })

src/Testcontainers/Clients/TestcontainersClient.cs

@@ -4,6 +4,7 @@ namespace DotNet.Testcontainers.Clients
   using System.Collections.Generic;
   using System.IO;
   using System.Linq;
+  using System.Reflection;
   using System.Text;
   using System.Text.RegularExpressions;
   using System.Threading;
@@ -28,6 +29,8 @@ internal sealed class TestcontainersClient : ITestcontainersClient
 
     public const string TestcontainersSessionIdLabel = TestcontainersLabel + ".session-id";
 
+    public static readonly string Version = typeof(TestcontainersClient).Assembly.GetCustomAttribute<AssemblyInformationalVersionAttribute>().InformationalVersion;
+
     private static readonly string OSRootDirectory = Path.GetPathRoot(Directory.GetCurrentDirectory());
 
     private static readonly Regex FromLinePattern = new Regex("FROM (?<arg>--[^\\s]+\\s)*(?<image>[^\\s]+).*", RegexOptions.None, TimeSpan.FromSeconds(1));

src/Testcontainers/Configurations/AuthConfigs/DockerEndpointAuthenticationConfiguration.cs

@@ -4,6 +4,7 @@ namespace DotNet.Testcontainers.Configurations
   using System.Collections.Generic;
   using System.Collections.ObjectModel;
   using Docker.DotNet;
+  using DotNet.Testcontainers.Clients;
   using JetBrains.Annotations;
 
   /// <inheritdoc cref="IDockerEndpointAuthenticationConfiguration" />
@@ -30,7 +31,12 @@ public DockerEndpointAuthenticationConfiguration(Uri endpoint, Credentials crede
     /// <inheritdoc />
     public DockerClientConfiguration GetDockerClientConfiguration(Guid sessionId = default)
     {
-      var defaultHttpRequestHeaders = new ReadOnlyDictionary<string, string>(new Dictionary<string, string> { { "x-tc-sid", sessionId.ToString("D") } });
+      var defaultHttpRequestHeaders = new ReadOnlyDictionary<string, string>(new Dictionary<string, string>
+      {
+        { "User-Agent", "tc-dotnet/" + TestcontainersClient.Version },
+        { "x-tc-sid", sessionId.ToString("D") },
+      });
+
       return new DockerClientConfiguration(Endpoint, Credentials, defaultHttpRequestHeaders: defaultHttpRequestHeaders);
     }
   }