[Messaging] Relax emulator endpoint restrictions (Azure#44052)

The focus of these changes is to remove the restriction
that the endpoint used in connection strings must
resolve to a variant of `localhost` when using the
development emulator.

A fix to parsing was also made to be resilient to
an endpoint with no scheme that specifies a custom port.
Previously, this would parse incorrectly and be
rejected.  The scenario is now detected and parsed.

Also included is a package bump for the AMQP transport
library and release prep for the Event Hubs core package.

Author: jsquire

eng/Packages.Data.props

@@ -151,7 +151,7 @@
     <PackageReference Update="Azure.ResourceManager.Storage" Version="1.2.1" />
 
     <!-- Other approved packages -->
-    <PackageReference Update="Microsoft.Azure.Amqp" Version="2.6.6" />
+    <PackageReference Update="Microsoft.Azure.Amqp" Version="2.6.7" />
     <PackageReference Update="Microsoft.Azure.WebPubSub.Common" Version="1.2.0" />
     <PackageReference Update="Microsoft.Identity.Client" Version="4.60.3" />
     <PackageReference Update="Microsoft.Identity.Client.Extensions.Msal" Version="4.60.3" />

sdk/eventhub/Azure.Messaging.EventHubs.Shared/src/Resources.Designer.cs

@@ -342,9 +342,6 @@
   <data name="TroubleshootingGuideLink" xml:space="preserve">
     <value>For troubleshooting information, see https://aka.ms/azsdk/net/eventhubs/exceptions/troubleshoot</value>
   </data>
-  <data name="InvalidEmulatorEndpoint" xml:space="preserve">
-    <value>The Event Hubs emulator is only available locally.  The endpoint must reference to the local host.</value>
-  </data>
   <data name="BufferedProducerStartupTimeout" xml:space="preserve">
     <value>The buffered producer took too long to start.</value>
   </data>

sdk/eventhub/Azure.Messaging.EventHubs.Shared/src/Resources.resx

@@ -1,16 +1,16 @@
 # Release History
 
-## 5.12.0-beta.1 (Unreleased)
-
-### Features Added
-
-### Breaking Changes
+## 5.11.3 (2024-05-15)
 
 ### Bugs Fixed
 
+- Fixed an error that caused connection strings using host names without a scheme to fail parsing and be considered invalid.
+
 ### Other Changes
 
-- Updated the `Microsoft.Azure.Amqp` dependency to 2.6.6, which includes a bug fix for an internal `NullReferenceException` that would sometimes impact creating new links. _(see: [#258](https://github.com/azure/azure-amqp/issues/258))_
+- Removed the restriction that endpoints used with the development emulator had to resolve to a `localhost` variant.
+
+- Updated the `Microsoft.Azure.Amqp` dependency to 2.6.7, which contains several bug fixes, including for an internal `NullReferenceException` that would sometimes impact creating new links. _(see: [#258](https://github.com/azure/azure-amqp/issues/258))_
 
 ## 5.11.2 (2024-04-10)
 

sdk/eventhub/Azure.Messaging.EventHubs/CHANGELOG.md

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <Description>Azure Event Hubs is a highly scalable publish-subscribe service that can ingest millions of events per second and stream them to multiple consumers.  This client library allows for both publishing and consuming events using Azure Event Hubs. For more information about Event Hubs, see https://azure.microsoft.com/en-us/services/event-hubs/</Description>
-    <Version>5.12.0-beta.1</Version>
+    <Version>5.11.3</Version>
     <!--The ApiCompatVersion is managed automatically and should not generally be modified manually.-->
     <ApiCompatVersion>5.11.2</ApiCompatVersion>
     <PackageTags>Azure;Event Hubs;EventHubs;.NET;AMQP;IoT;$(PackageCommonTags)</PackageTags>

sdk/eventhub/Azure.Messaging.EventHubs/src/Azure.Messaging.EventHubs.csproj

@@ -3,6 +3,7 @@
 
 using System;
 using System.ComponentModel;
+using System.Runtime.CompilerServices;
 using System.Text;
 using Azure.Core;
 
@@ -244,13 +245,6 @@ internal void Validate(string explicitEventHubName,
             {
                 throw new ArgumentException(Resources.MissingConnectionInformation, connectionStringArgumentName);
             }
-
-            // Ensure that the namespace reflects the local host when the development emulator is being used.
-
-            if ((UseDevelopmentEmulator) && (!Endpoint.IsLoopback))
-            {
-                throw new ArgumentException(Resources.InvalidEmulatorEndpoint, connectionStringArgumentName);
-            }
         }
 
         /// <summary>
@@ -334,6 +328,17 @@ public static EventHubsConnectionStringProperties Parse(string connectionString)
                         {
                             endpointUri = null;
                         }
+                        else if (string.IsNullOrEmpty(endpointUri.Host) && (CountChar(':', value.AsSpan()) == 1))
+                        {
+                            // If the host was empty after parsing and the value has a single port/scheme separator,
+                            // then the parsing likely failed to recognize the host due to the lack of a scheme.  Add
+                            // an artificial scheme and try to parse again.
+
+                            if (!Uri.TryCreate(string.Concat(EventHubsEndpointScheme, value), UriKind.Absolute, out endpointUri))
+                            {
+                                endpointUri = null;
+                            }
+                        }
 
                         var endpointBuilder = endpointUri switch
                         {
@@ -400,5 +405,30 @@ public static EventHubsConnectionStringProperties Parse(string connectionString)
 
             return parsedValues;
         }
+
+        /// <summary>
+        ///   Counts the number of times a character occurs in a given span.
+        /// </summary>
+        ///
+        /// <param name="span">The span to evaluate.</param>
+        /// <param name="value">The character to count.</param>
+        ///
+        /// <returns>The number of times the <paramref name="value"/> occurs in <paramref name="span"/>.</returns>
+        ///
+        private static int CountChar(char value,
+                                     ReadOnlySpan<char> span)
+        {
+            var count = 0;
+
+            foreach (var character in span)
+            {
+                if (character == value)
+                {
+                    ++count;
+                }
+            }
+
+            return count;
+        }
     }
 }

sdk/eventhub/Azure.Messaging.EventHubs/src/EventHubsConnectionStringProperties.cs

@@ -347,7 +347,7 @@ public void ParseIgnoresUnknownTokens()
         [TestCase("amqp://test.endpoint.com")]
         [TestCase("http://test.endpoint.com")]
         [TestCase("https://test.endpoint.com:8443")]
-        public void ParseDoesAcceptsHostNamesAndUrisForTheEndpoint(string endpointValue)
+        public void ParseAcceptsHostNamesAndUrisForTheEndpoint(string endpointValue)
         {
             var connectionString = $"Endpoint={ endpointValue };EntityPath=dummy";
             var parsed = EventHubsConnectionStringProperties.Parse(connectionString);
@@ -371,7 +371,7 @@ public void ParseDoesAcceptsHostNamesAndUrisForTheEndpoint(string endpointValue)
         /// </summary>
         ///
         [Test]
-        [TestCase("test.endpoint.com:443")]
+        [TestCase("test-endpoint|com:443")]
         [TestCase("notvalid=[broke]")]
         public void ParseDoesNotAllowAnInvalidEndpointFormat(string endpointValue)
         {
@@ -402,6 +402,7 @@ public void ParseConsidersMissingValuesAsMalformed(string connectionString)
         ///   method.
         /// </summary>
         ///
+        [Test]
         public void ParseDetectsDevelopmentEmulatorUse()
         {
             var connectionString = "Endpoint=localhost:1234;SharedAccessKeyName=[name];SharedAccessKey=[value];UseDevelopmentEmulator=true";
@@ -416,6 +417,7 @@ public void ParseDetectsDevelopmentEmulatorUse()
         ///   method.
         /// </summary>
         ///
+        [Test]
         public void ParseRespectsDevelopmentEmulatorValue()
         {
             var connectionString = "Endpoint=localhost:1234;SharedAccessKeyName=[name];SharedAccessKey=[value];UseDevelopmentEmulator=false";
@@ -425,6 +427,57 @@ public void ParseRespectsDevelopmentEmulatorValue()
             Assert.That(parsed.UseDevelopmentEmulator, Is.False, "The development emulator flag should have been unset.");
         }
 
+        /// <summary>
+        ///   Verifies functionality of the <see cref="EventHubsConnectionStringProperties.Parse" />
+        ///   method.
+        /// </summary>
+        ///
+        [Test]
+        [TestCase("localhost")]
+        [TestCase("localhost:9084")]
+        [TestCase("127.0.0.1")]
+        [TestCase("local.docker.com")]
+        [TestCase("local.docker.com:8080")]
+        [TestCase("www.fake.com")]
+        [TestCase("www.fake.com:443")]
+        public void ParseRespectsTheEndpointForDevelopmentEmulatorValue(string host)
+        {
+            var connectionString = $"Endpoint={ host };SharedAccessKeyName=[name];SharedAccessKey=[value];UseDevelopmentEmulator=true";
+            var endpoint = new Uri(string.Concat(GetEventHubsEndpointScheme(), host));
+            var parsed = EventHubsConnectionStringProperties.Parse(connectionString);
+
+            Assert.That(parsed.Endpoint.Host, Is.EqualTo(endpoint.Host), "The endpoint hosts should match.");
+            Assert.That(parsed.Endpoint.Port, Is.EqualTo(endpoint.Port), "The endpoint ports should match.");
+            Assert.That(parsed.UseDevelopmentEmulator, Is.True, "The development emulator flag should have been set.");
+        }
+
+        /// <summary>
+        ///   Verifies functionality of the <see cref="EventHubsConnectionStringProperties.Parse" />
+        ///   method.
+        /// </summary>
+        ///
+        [Test]
+        [TestCase("sb://localhost")]
+        [TestCase("http://localhost:9084")]
+        [TestCase("sb://local.docker.com")]
+        [TestCase("amqps://local.docker.com:8080")]
+        [TestCase("sb://www.fake.com")]
+        [TestCase("amqp://www.fake.com:443")]
+        public void ParseRespectsTheUrlFormatEndpointForDevelopmentEmulatorValue(string host)
+        {
+            var endpoint = new UriBuilder(host)
+            {
+                Scheme = GetEventHubsEndpointScheme()
+            };
+
+            var connectionString = $"Endpoint={ host };SharedAccessKeyName=[name];SharedAccessKey=[value];UseDevelopmentEmulator=true";
+            var parsed = EventHubsConnectionStringProperties.Parse(connectionString);
+
+            Assert.That(parsed.Endpoint.Host, Is.EqualTo(endpoint.Host), "The endpoint hosts should match.");
+            Assert.That(parsed.Endpoint.Port, Is.EqualTo(endpoint.Port), "The endpoint ports should match.");
+            Assert.That(parsed.UseDevelopmentEmulator, Is.True, "The development emulator flag should have been set.");
+        }
+
         /// <summary>
         ///   Verifies functionality of the <see cref="EventHubsConnectionStringProperties.Parse" />
         ///   method.
@@ -657,33 +710,6 @@ public void ValidateAllowsSharedAccessSignatureAuthorization()
             Assert.That(() => properties.Validate(eventHubName, "dummy"), Throws.Nothing, "Validation should accept the shared access signature authorization.");
         }
 
-        /// <summary>
-        ///    Verifies functionality of the <see cref="EventHubsConnectionStringProperties.Validate" />
-        ///    method.
-        /// </summary>
-        ///
-        [Test]
-        [TestCase("localhost", true)]
-        [TestCase("127.0.0.1", true)]
-        [TestCase("www.microsoft.com", false)]
-        [TestCase("fake.servicebus.windows.net", false)]
-        [TestCase("weirdname:8080", false)]
-        public void ValidateRequiresLocalEndpointForDevelopmentEmulator(string endpoint,
-                                                                        bool isValid)
-        {
-            var fakeConnection = $"Endpoint=sb://{ endpoint };SharedAccessSignature=[not_real];UseDevelopmentEmulator=true";
-            var properties = EventHubsConnectionStringProperties.Parse(fakeConnection);
-
-            if (isValid)
-            {
-                Assert.That(() => properties.Validate("fake", "dummy"), Throws.Nothing, "Validation should allow a local endpoint.");
-            }
-            else
-            {
-                Assert.That(() => properties.Validate("fake", "dummy"), Throws.ArgumentException.And.Message.StartsWith(Resources.InvalidEmulatorEndpoint), "Validation should enforce that the endpoint is a local address.");
-            }
-        }
-
         /// <summary>
         ///   Compares two <see cref="EventHubsConnectionStringProperties" /> instances for
         ///   structural equality.

sdk/eventhub/Azure.Messaging.EventHubs/tests/Core/EventHubsConnectionStringPropertiesTests.cs

@@ -8,8 +8,12 @@
 
 ### Bugs Fixed
 
+- Fixed an error that caused connection strings using host names without a scheme to fail parsing and be considered invalid.
+
 ### Other Changes
 
+- Updated the `Microsoft.Azure.Amqp` dependency to 2.6.7, which contains a fix for decoding messages with a null format code as the body.
+
 ## 7.18.0-beta.1 (2024-05-08)
 
 ### Features Added

sdk/servicebus/Azure.Messaging.ServiceBus/CHANGELOG.md

@@ -307,6 +307,17 @@ public static ServiceBusConnectionStringProperties Parse(string connectionString
                         {
                             endpointUri = null;
                         }
+                        else if (string.IsNullOrEmpty(endpointUri.Host) && (CountChar(':', value.AsSpan()) == 1))
+                        {
+                            // If the host was empty after parsing and the value has a single port/scheme separator,
+                            // then the parsing likely failed to recognize the host due to the lack of a scheme.  Add
+                            // an artificial scheme and try to parse again.
+
+                            if (!Uri.TryCreate($"{ServiceBusEndpointSchemeName}://{value}", UriKind.Absolute, out endpointUri))
+                            {
+                                endpointUri = null;
+                            }
+                        }
 
                         var endpointBuilder = endpointUri switch
                         {
@@ -371,14 +382,32 @@ public static ServiceBusConnectionStringProperties Parse(string connectionString
                 lastPosition = currentPosition;
             }
 
-            // Enforce that the development emulator can only be used for local development.
+            return parsedValues;
+        }
 
-            if ((parsedValues.UseDevelopmentEmulator) && (!parsedValues.Endpoint.IsLoopback))
+        /// <summary>
+        ///   Counts the number of times a character occurs in a given span.
+        /// </summary>
+        ///
+        /// <param name="span">The span to evaluate.</param>
+        /// <param name="value">The character to count.</param>
+        ///
+        /// <returns>The number of times the <paramref name="value"/> occurs in <paramref name="span"/>.</returns>
+        ///
+        private static int CountChar(char value,
+                                     ReadOnlySpan<char> span)
+        {
+            var count = 0;
+
+            foreach (var character in span)
             {
-                throw new ArgumentException("The Service Bus emulator is only available locally. The endpoint must reference to the local host.", connectionString);
+                if (character == value)
+                {
+                    ++count;
+                }
             }
 
-            return parsedValues;
+            return count;
         }
     }
 }