SDK 3.13.0: Adds change log and bumps the SDK version (#1858)

* Bump SDK to version 3.13.0

Author: j82w

Directory.Build.props

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
-    <ClientOfficialVersion>3.12.0</ClientOfficialVersion>
+    <ClientOfficialVersion>3.13.0</ClientOfficialVersion>
     <ClientPreviewVersion>3.13.0</ClientPreviewVersion>
     <DirectVersion>3.13.2</DirectVersion>
     <EncryptionVersion>1.0.0-preview6</EncryptionVersion>

Microsoft.Azure.Cosmos/contracts/API_3.13.0.txt

@@ -115,7 +115,7 @@ public virtual string Session
         public virtual string ContentLength
         {
             get => this.GetString(HttpConstants.HttpHeaders.ContentLength);
-            internal set => this.SetProperty(HttpConstants.HttpHeaders.ContentLength, value);
+            set => this.SetProperty(HttpConstants.HttpHeaders.ContentLength, value);
         }
 
         /// <summary>
@@ -220,6 +220,18 @@ public virtual string this[string headerName]
             set => this.CosmosMessageHeaders[headerName] = value;
         }
 
+        /// <summary>
+        /// Enumerates all the HTTP headers names in the <see cref="Headers"/>.
+        /// </summary>
+        /// <returns>An enumator for all headers.</returns>
+        public virtual IEnumerator<string> GetEnumerator()
+        {
+            foreach (string key in this.CosmosMessageHeaders.AllKeys())
+            {
+                yield return key;
+            }
+        }
+
         /// <summary>
         /// Adds a header to the Header collection.
         /// </summary>

Microsoft.Azure.Cosmos/src/Headers/Headers.cs

@@ -3074,6 +3074,13 @@
           "Attributes": [],
           "MethodInfo": null
         },
+        "System.Collections.Generic.IEnumerator`1[System.String] GetEnumerator()[System.Runtime.CompilerServices.IteratorStateMachineAttribute(typeof(Microsoft.Azure.Cosmos.Headers+<GetEnumerator>d__63))]": {
+          "Type": "Method",
+          "Attributes": [
+            "IteratorStateMachineAttribute"
+          ],
+          "MethodInfo": "System.Collections.Generic.IEnumerator`1[System.String] GetEnumerator()"
+        },
         "System.String ActivityId": {
           "Type": "Property",
           "Attributes": [],
@@ -3199,6 +3206,11 @@
           "Attributes": [],
           "MethodInfo": "Void Set(System.String, System.String)"
         },
+        "Void set_ContentLength(System.String)": {
+          "Type": "Method",
+          "Attributes": [],
+          "MethodInfo": "Void set_ContentLength(System.String)"
+        },
         "Void set_Item(System.String, System.String)": {
           "Type": "Method",
           "Attributes": [],

Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.Tests/Contracts/DotNetSDKAPI.json

@@ -95,6 +95,12 @@ public void TestGetIEnumerableKeys()
                 Assert.AreEqual(value, Headers[header]);
                 return;
             }
+
+            IEnumerator<string> keys = Headers.GetEnumerator();
+            Assert.IsNull(keys.Current);
+            Assert.IsTrue(keys.MoveNext());
+            Assert.AreEqual(Key, keys.Current);
+            Assert.IsFalse(keys.MoveNext());
         }
 
         [TestMethod]

Microsoft.Azure.Cosmos/tests/Microsoft.Azure.Cosmos.Tests/HeadersTests.cs

@@ -3,6 +3,27 @@ Preview features are treated as a separate branch and will not be included in th
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+### <a name="3.13.0"/> [3.13.0](https://www.nuget.org/packages/Microsoft.Azure.Cosmos/3.13.0) - 2020-09-21
+
+#### Added
+
+- [#1743](https://github.com/Azure/azure-cosmos-dotnet-v3/pull/1743) Query Performance: Adds skipping getting query plan for non-aggregate single partition queries on non-Windows x64 systems when FeedOptions.PartitionKey is set
+- [#1768](https://github.com/Azure/azure-cosmos-dotnet-v3/pull/1768) Performance: Adds SessionToken optimization to reduce header size by removing session token for CRUD on stored procedure, triggers, and UDFs
+- [#1781](https://github.com/Azure/azure-cosmos-dotnet-v3/pull/1781) Performance: Adds headers optimization which can reduce response allocation by 10 KB per a request. 
+- [#1825](https://github.com/Azure/azure-cosmos-dotnet-v3/pull/1825) RequestOptions.Properties: Adds the ability for applications to specify request context
+- [#1835](https://github.com/Azure/azure-cosmos-dotnet-v3/pull/1835) Performance: Add HttpClient optimization to avoid double buffering gateway responses
+- [#1837](https://github.com/Azure/azure-cosmos-dotnet-v3/pull/1837) Query SystemFunctions : Adds DateTime System Functions
+- [#1842](https://github.com/Azure/azure-cosmos-dotnet-v3/pull/1842) Query Performance: Adds Singleton QueryPartitionProvider. Helps when Container is getting recreated.
+- [#1857](https://github.com/Azure/azure-cosmos-dotnet-v3/pull/1857) Performance: Adds finalizer optimizations in a few places (Thanks to pentp)
+- [#1843](https://github.com/Azure/azure-cosmos-dotnet-v3/pull/1843) Performance: Adds Transport serialization, SessionTokenMismatchRetryPolicy, and store response dictionary optimizations
+
+#### Fixed
+
+- [#1757](https://github.com/Azure/azure-cosmos-dotnet-v3/pull/1757) Batch API: Fixes the size limit to reduce timeouts
+- [#1758](https://github.com/Azure/azure-cosmos-dotnet-v3/pull/1758) Connectivity: Fixes address resolution calls when using EnableTcpConnectionEndpointRediscovery
+- [#1788](https://github.com/Azure/azure-cosmos-dotnet-v3/pull/1788) Transient HTTP exceptions: Adds retry logic to all http requests
+- [#1863](https://github.com/Azure/azure-cosmos-dotnet-v3/pull/1863) HttpClientHandler: Fixes HttpClientHandler PlatformNotSupportedException
+
 ### <a name="3.13.0-preview"/> [3.13.0-preview](https://www.nuget.org/packages/Microsoft.Azure.Cosmos/3.13.0-preview) - 2020-08-12
 
 #### Added