Bump version to 4.5.0 with host version 4.1044.400 (#4706)

Copilot · v-amakhan · liliankasem · web-flow · commit e74aae22c963 · 2025-11-12T10:46:24.000-08:00
* Initial plan

* Bump version to 4.5.0 with host version 4.1044.400

Co-authored-by: v-amakhan &lt;186753324+v-amakhan@users.noreply.github.com&gt;

* Update In-Proc Host Version to 4.44.400 (4.844.100, 4.644.100)

Co-authored-by: v-amakhan &lt;186753324+v-amakhan@users.noreply.github.com&gt;

* Update host &amp; worker pkgs and fix issues

* Add new artifatc feed to nuget.config

---------

Co-authored-by: copilot-swe-agent[bot] &lt;198982749+Copilot@users.noreply.github.com&gt;
Co-authored-by: v-amakhan &lt;186753324+v-amakhan@users.noreply.github.com&gt;
Co-authored-by: Lilian Kasem &lt;likasem@microsoft.com&gt;
diff --git a/NuGet.Config b/NuGet.Config
@@ -9,5 +9,6 @@
     <add key="AzureFunctionsPreRelease" value="https://azfunc.pkgs.visualstudio.com/e6a70c92-4128-439f-8012-382fe78d6396/_packaging/AzureFunctionsPreRelease/nuget/v3/index.json" />
     <add key="AzureFunctionsTempStaging" value="https://azfunc.pkgs.visualstudio.com/e6a70c92-4128-439f-8012-382fe78d6396/_packaging/AzureFunctionsTempStaging/nuget/v3/index.json" />
     <add key="DotnetLibraries" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-libraries/nuget/v3/index.json" />
+    <add key="Infra" value="https://pkgs.dev.azure.com/azfunc/public/_packaging/infra/nuget/v3/index.json" />
   </packageSources>
 </configuration>
diff --git a/eng/build/Packages.props b/eng/build/Packages.props
@@ -20,7 +20,7 @@
     <PackageVersion Include="Microsoft.ApplicationInsights" Version="2.22.0" />
     <PackageVersion Include="Microsoft.AspNetCore.DataProtection" Version="2.2.0" />
     <PackageVersion Include="Microsoft.Azure.DurableTask.AzureStorage.Internal" Version="1.4.0" />
-    <PackageVersion Include="Microsoft.Azure.WebJobs.Script.WebHost" Version="4.1043.200" />
+    <PackageVersion Include="Microsoft.Azure.WebJobs.Script.WebHost" Version="4.1044.400" />
     <PackageVersion Include="Microsoft.Build" Version="17.0.0" />
     <PackageVersion Include="Microsoft.Identity.Client" Version="4.73.1" />
     <PackageVersion Include="NuGet.Packaging" Version="5.11.6" />
@@ -32,11 +32,11 @@
   <!-- workers -->
   <ItemGroup>
     <PackageVersion Include="Microsoft.Azure.Functions.JavaWorker" Version="2.19.2" />
-    <PackageVersion Include="Microsoft.Azure.Functions.NodeJsWorker" Version="3.11.0" />
+    <PackageVersion Include="Microsoft.Azure.Functions.NodeJsWorker" Version="3.12.0" />
     <PackageVersion Include="Microsoft.Azure.Functions.PowerShellWorker.PS7.0" Version="4.0.3148" />
     <PackageVersion Include="Microsoft.Azure.Functions.PowerShellWorker.PS7.2" Version="4.0.4025" />
-    <PackageVersion Include="Microsoft.Azure.Functions.PowerShellWorker.PS7.4" Version="4.0.4206" />
-    <PackageVersion Include="Microsoft.Azure.Functions.PythonWorker" Version="4.39.2" />
+    <PackageVersion Include="Microsoft.Azure.Functions.PowerShellWorker.PS7.4" Version="4.0.4581" />
+    <PackageVersion Include="Microsoft.Azure.Functions.PythonWorker" Version="4.40.2" />
   </ItemGroup>
   <!-- host -->
   <ItemGroup>
diff --git a/release_notes.md b/release_notes.md
@@ -1,13 +1,14 @@
-# Azure Functions CLI 4.4.0
+# Azure Functions CLI 4.5.0
 
 #### Host Version
 
-- Host Version: 4.1043.200
-- In-Proc Host Version: 4.41.100 (4.841.100, 4.641.100)
+- Host Version: 4.1044.400
+- In-Proc Host Version: 4.44.100 (4.844.100, 4.644.100)
 
 #### Changes
 
 - Add updated Durable .NET templates (#4692)
 - Adding the MCP Tool Trigger Templates for the Node/Typescript (#4651)
 - Set `AzureWebJobsStorage` to use the storage emulator by default on all platforms (#4685)
+- Set `FUNCTIONS_WORKER_RUNTIME` to custom if the  `EnableMcpCustomHandlerPreview` feature flag is set (#4703)
 - Update .NET isolated templates package to 4.0.5331 (#4712)
diff --git a/src/Cli/func/Actions/HostActions/StartHostAction.cs b/src/Cli/func/Actions/HostActions/StartHostAction.cs
@@ -464,7 +464,7 @@ public override async Task RunAsync()
 
             if (hostService.State is not ScriptHostState.Stopping && hostService.State is not ScriptHostState.Stopped)
             {
-                await hostService.DelayUntilHostReady();
+                await hostService.DelayUntilHostReadyAsync();
 
                 var scriptHost = hostService.Services.GetRequiredService<IScriptJobHost>();
                 var httpOptions = hostService.Services.GetRequiredService<IOptions<HttpOptions>>();
diff --git a/src/Cli/func/Common/Utilities.cs b/src/Cli/func/Common/Utilities.cs
@@ -297,9 +297,10 @@ internal static bool IsSystemLogCategory(string category)
 
         internal static IConfigurationRoot BuildHostJsonConfigutation(ScriptApplicationHostOptions hostOptions)
         {
-            IConfigurationBuilder builder = new ConfigurationBuilder();
-            builder.Add(new HostJsonFileConfigurationSource(hostOptions, SystemEnvironment.Instance, loggerFactory: NullLoggerFactory.Instance, metricsLogger: new MetricsLogger()));
-            var configuration = builder.Build();
+            var builder = new ConfigurationBuilder();
+            var hostJsonFileConfigurationOptions = new HostJsonFileConfigurationOptions(hostOptions);
+            builder.Add(new HostJsonFileConfigurationSource(hostJsonFileConfigurationOptions, loggerFactory: NullLoggerFactory.Instance, metricsLogger: new MetricsLogger()));
+            IConfigurationRoot configuration = builder.Build();
             return configuration;
         }
 
diff --git a/src/Cli/func/Directory.Version.props b/src/Cli/func/Directory.Version.props
@@ -1,7 +1,7 @@
 <Project>
 
   <PropertyGroup>
-    <VersionPrefix>4.4.0</VersionPrefix>
+    <VersionPrefix>4.5.0</VersionPrefix>
     <VersionSuffix></VersionSuffix>
     <UpdateBuildNumber>true</UpdateBuildNumber>
   </PropertyGroup>
diff --git a/src/Cli/func/ExtensionBundle/ExtensionBundleHelper.cs b/src/Cli/func/ExtensionBundle/ExtensionBundleHelper.cs
@@ -39,7 +39,8 @@ public static ExtensionBundleManager GetExtensionBundleManager()
             }
 
             var configOptions = new FunctionsHostingConfigOptions();
-            return new ExtensionBundleManager(extensionBundleOption, SystemEnvironment.Instance, NullLoggerFactory.Instance, configOptions);
+            IHttpClientFactory httpClientFactory = new SimpleHttpClientFactory();
+            return new ExtensionBundleManager(extensionBundleOption, SystemEnvironment.Instance, NullLoggerFactory.Instance, configOptions, httpClientFactory);
         }
 
         public static ExtensionBundleContentProvider GetExtensionBundleContentProvider()
diff --git a/src/Cli/func/ExtensionBundle/SimpleHttpClientFactory.cs b/src/Cli/func/ExtensionBundle/SimpleHttpClientFactory.cs
@@ -0,0 +1,40 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the MIT License. See LICENSE in the project root for license information.
+
+using System.Collections.Concurrent;
+using System.Net;
+
+namespace Azure.Functions.Cli.ExtensionBundle
+{
+    /// <summary>
+    /// Minimal IHttpClientFactory implementation for Core Tools.
+    /// Reuses a single HttpClient per logical name to avoid socket exhaustion.
+    /// </summary>
+    internal class SimpleHttpClientFactory : IHttpClientFactory
+    {
+        private readonly ConcurrentDictionary<string, HttpClient> _clients = new();
+        private static readonly TimeSpan _defaultTimeout = TimeSpan.FromMinutes(1);
+
+        public HttpClient CreateClient(string name)
+        {
+            // Name can be ignored for now except for providing isolation if needed later.
+            return _clients.GetOrAdd(name ?? string.Empty, static _ =>
+            {
+                var handler = new SocketsHttpHandler
+                {
+                    AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate,
+                    PooledConnectionIdleTimeout = TimeSpan.FromMinutes(2),
+                    PooledConnectionLifetime = TimeSpan.FromMinutes(10)
+                };
+
+                var client = new HttpClient(handler, disposeHandler: true)
+                {
+                    Timeout = _defaultTimeout
+                };
+
+                client.DefaultRequestHeaders.UserAgent.ParseAdd("azure-functions-core-tools-extension-bundle");
+                return client;
+            });
+        }
+    }
+}

Original file line number	Diff line number	Diff line change
`@@ -464,7 +464,7 @@ public override async Task RunAsync()`
`464`	`464`
`465`	`465`	`if (hostService.State is not ScriptHostState.Stopping && hostService.State is not ScriptHostState.Stopped)`
`466`	`466`	`{`
`467`		`- await hostService.DelayUntilHostReady();`
	`467`	`+ await hostService.DelayUntilHostReadyAsync();`
`468`	`468`
`469`	`469`	`var scriptHost = hostService.Services.GetRequiredService<IScriptJobHost>();`
`470`	`470`	`var httpOptions = hostService.Services.GetRequiredService<IOptions<HttpOptions>>();`
Original file line number	Diff line number	Diff line change
`@@ -297,9 +297,10 @@ internal static bool IsSystemLogCategory(string category)`
`297`	`297`
`298`	`298`	`internal static IConfigurationRoot BuildHostJsonConfigutation(ScriptApplicationHostOptions hostOptions)`
`299`	`299`	`{`
`300`		`- IConfigurationBuilder builder = new ConfigurationBuilder();`
`301`		`- builder.Add(new HostJsonFileConfigurationSource(hostOptions, SystemEnvironment.Instance, loggerFactory: NullLoggerFactory.Instance, metricsLogger: new MetricsLogger()));`
`302`		`- var configuration = builder.Build();`
	`300`	`+ var builder = new ConfigurationBuilder();`
	`301`	`+ var hostJsonFileConfigurationOptions = new HostJsonFileConfigurationOptions(hostOptions);`
	`302`	`+ builder.Add(new HostJsonFileConfigurationSource(hostJsonFileConfigurationOptions, loggerFactory: NullLoggerFactory.Instance, metricsLogger: new MetricsLogger()));`
	`303`	`+ IConfigurationRoot configuration = builder.Build();`
`303`	`304`	`return configuration;`
`304`	`305`	`}`
`305`	`306`
Original file line number	Diff line number	Diff line change
`@@ -39,7 +39,8 @@ public static ExtensionBundleManager GetExtensionBundleManager()`
`39`	`39`	`}`
`40`	`40`
`41`	`41`	`var configOptions = new FunctionsHostingConfigOptions();`
`42`		`- return new ExtensionBundleManager(extensionBundleOption, SystemEnvironment.Instance, NullLoggerFactory.Instance, configOptions);`
	`42`	`+ IHttpClientFactory httpClientFactory = new SimpleHttpClientFactory();`
	`43`	`+ return new ExtensionBundleManager(extensionBundleOption, SystemEnvironment.Instance, NullLoggerFactory.Instance, configOptions, httpClientFactory);`
`43`	`44`	`}`
`44`	`45`
`45`	`46`	`public static ExtensionBundleContentProvider GetExtensionBundleContentProvider()`