From 2bb8fb14da20d6fb32b7224c7c3a4faa4460012b Mon Sep 17 00:00:00 2001
From: Isaiah Vita <82135527+isaiahvita@users.noreply.github.com>
Date: Tue, 29 Aug 2023 13:38:03 -0700
Subject: [PATCH] add user agent internal metadata (#4967)

---
 CHANGELOG_PENDING.md            |  2 ++
 aws/corehandlers/awsinternal.go |  4 ++++
 aws/corehandlers/user_agent.go  | 10 ++++++++++
 aws/defaults/defaults.go        |  1 +
 4 files changed, 17 insertions(+)
 create mode 100644 aws/corehandlers/awsinternal.go

diff --git a/CHANGELOG_PENDING.md b/CHANGELOG_PENDING.md
index 8a1927a39ca..73d430b318c 100644
--- a/CHANGELOG_PENDING.md
+++ b/CHANGELOG_PENDING.md
@@ -1,4 +1,6 @@
 ### SDK Features
+* `aws/corehandlers`: Add internal flag in user agent functionality
+  * Added handler which will add aws internal metadata to the user agent string
 
 ### SDK Enhancements
 
diff --git a/aws/corehandlers/awsinternal.go b/aws/corehandlers/awsinternal.go
new file mode 100644
index 00000000000..140242dd1b8
--- /dev/null
+++ b/aws/corehandlers/awsinternal.go
@@ -0,0 +1,4 @@
+// DO NOT EDIT
+package corehandlers
+
+const isAwsInternal = ""
\ No newline at end of file
diff --git a/aws/corehandlers/user_agent.go b/aws/corehandlers/user_agent.go
index ab69c7a6f38..ac842c55d89 100644
--- a/aws/corehandlers/user_agent.go
+++ b/aws/corehandlers/user_agent.go
@@ -35,3 +35,13 @@ var AddHostExecEnvUserAgentHander = request.NamedHandler{
 		request.AddToUserAgent(r, execEnvUAKey+"/"+v)
 	},
 }
+
+var AddAwsInternal = request.NamedHandler{
+	Name: "core.AddAwsInternal",
+	Fn: func(r *request.Request) {
+		if len(isAwsInternal) == 0 {
+			return
+		}
+		request.AddToUserAgent(r, isAwsInternal)
+	},
+}
diff --git a/aws/defaults/defaults.go b/aws/defaults/defaults.go
index 23bb639e018..e39903284dd 100644
--- a/aws/defaults/defaults.go
+++ b/aws/defaults/defaults.go
@@ -74,6 +74,7 @@ func Handlers() request.Handlers {
 	handlers.Validate.PushBackNamed(corehandlers.ValidateEndpointHandler)
 	handlers.Validate.AfterEachFn = request.HandlerListStopOnError
 	handlers.Build.PushBackNamed(corehandlers.SDKVersionUserAgentHandler)
+	handlers.Build.PushBackNamed(corehandlers.AddAwsInternal)
 	handlers.Build.PushBackNamed(corehandlers.AddHostExecEnvUserAgentHander)
 	handlers.Build.AfterEachFn = request.HandlerListStopOnError
 	handlers.Sign.PushBackNamed(corehandlers.BuildContentLengthHandler)