[smithy-rs] Move Message, Header, HeaderValue, and StrBytes f…

…rom `aws-smithy-eventstream` to `aws-smithy-types` (#3139)

## Motivation and Context
Fixes the following statement in
smithy-lang/smithy-rs#3114

> A notable breaking change is the error type of the new recv method.
Previously, it was [SdkError<E,
RawMessage>>](https://docs.rs/aws-smithy-http/0.57.0/aws_smithy_http/event_stream/struct.Receiver.html#method.recv)
but it is now a BoxError. This means that upon an event receive error,
customers can only show what the error is, but not match on it and take
some actions.

so that the `recv` method on a new-type wrapper
`aws_smithy_http::event_stream::Receiver` can expose `SdkError<E,
RawMessage>>` in public API. It is the responsibility of the above PR to
move
[RawMessage](https://github.com/awslabs/smithy-rs/blob/c7f0d5dc33937d65841d74b5b828cc77ed1d2db4/rust-runtime/aws-smithy-http/src/event_stream/receiver.rs#L92-L98)
from `aws-smithy-http` to `aws-smithy-types` but doing so first requires
`Message` to be moved to `aws-smithy-types`, hence this PR.

## Description
Moving `Message` to `aws-smithy-types` also requires moving the types it
depends upon, namely `Header`, `HederValue`, and `StrBytes`. However,
their serialization/deserialization methods (`read_from` and `write_to`)
remain in `aws-smithy-eventstream` and they are converted to free
functions, with the aim of moving things as minimally as possible.

`aws-smithy-eventstream` has fuzz testing. It previously implemented the
`Arbitrary` trait for moved types, but since they are now in
`aws-smithy-types`, we need to have newtypes for them to enable the
trait due to the orphan rules. A newly added module
`aws-smithy-eventstream::arbitrary` is exactly for that purpose.

## Testing
Relied on the existing tests.

## Checklist
<!--- If a checkbox below is not applicable, then please DELETE it
rather than leaving it unchecked -->
- [x] I have updated `CHANGELOG.next.toml` if I made changes to the
smithy-rs codegen or runtime crates

----

_By submitting this pull request, I confirm that you can use, modify,
copy, and redistribute this contribution, under the terms of your
choice._

sdk/accessanalyzer/src/primitives.rs

@@ -2,6 +2,9 @@
 pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/accessanalyzer/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/account/src/primitives.rs

@@ -1,5 +1,8 @@
 // Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/account/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/acm/src/primitives.rs

@@ -3,6 +3,9 @@ pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::Blob;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/acm/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/acmpca/src/primitives.rs

@@ -3,6 +3,9 @@ pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::Blob;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/acmpca/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/alexaforbusiness/src/primitives.rs

@@ -2,6 +2,9 @@
 pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/alexaforbusiness/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/amp/src/primitives.rs

@@ -3,6 +3,9 @@ pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::Blob;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/amp/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/amplify/src/primitives.rs

@@ -2,6 +2,9 @@
 pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/amplify/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/amplifybackend/src/primitives.rs

@@ -1,5 +1,8 @@
 // Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/amplifybackend/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/amplifyuibuilder/src/primitives.rs

@@ -2,6 +2,9 @@
 pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/amplifyuibuilder/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/apigateway/src/primitives.rs

@@ -3,6 +3,9 @@ pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::Blob;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/apigateway/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/apigatewaymanagement/src/primitives.rs

@@ -2,3 +2,6 @@
 pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::Blob;
 pub use ::aws_smithy_types::DateTime;
+
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;

sdk/apigatewaymanagement/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/apigatewayv2/src/primitives.rs

@@ -3,6 +3,9 @@ pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::Blob;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/apigatewayv2/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/appconfig/src/primitives.rs

@@ -3,6 +3,9 @@ pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::Blob;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/appconfig/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/appconfigdata/src/primitives.rs

@@ -1,6 +1,9 @@
 // Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
 pub use ::aws_smithy_types::Blob;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/appconfigdata/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/appfabric/src/primitives.rs

@@ -2,6 +2,9 @@
 pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/appfabric/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/appflow/src/primitives.rs

@@ -2,6 +2,9 @@
 pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/appflow/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/appintegrations/src/primitives.rs

@@ -1,3 +1,6 @@
 // Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
 pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::DateTime;
+
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;

sdk/appintegrations/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/applicationautoscaling/src/primitives.rs

@@ -2,6 +2,9 @@
 pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/applicationautoscaling/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/applicationcostprofiler/src/primitives.rs

@@ -2,6 +2,9 @@
 pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/applicationcostprofiler/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/applicationdiscovery/src/primitives.rs

@@ -2,6 +2,9 @@
 pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/applicationdiscovery/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/applicationinsights/src/primitives.rs

@@ -2,6 +2,9 @@
 pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/applicationinsights/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/appmesh/src/primitives.rs

@@ -2,6 +2,9 @@
 pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/appmesh/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/apprunner/src/primitives.rs

@@ -2,6 +2,9 @@
 pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/apprunner/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/appstream/src/primitives.rs

@@ -2,6 +2,9 @@
 pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/appstream/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/appsync/src/primitives.rs

@@ -3,6 +3,9 @@ pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::Blob;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/appsync/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/arczonalshift/src/primitives.rs

@@ -2,6 +2,9 @@
 pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/arczonalshift/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/athena/src/primitives.rs

@@ -2,6 +2,9 @@
 pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/athena/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/auditmanager/src/primitives.rs

@@ -2,6 +2,9 @@
 pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/auditmanager/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/autoscaling/src/primitives.rs

@@ -2,6 +2,9 @@
 pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/autoscaling/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/autoscalingplans/src/primitives.rs

@@ -2,6 +2,9 @@
 pub use ::aws_smithy_types::date_time::Format as DateTimeFormat;
 pub use ::aws_smithy_types::DateTime;
 
+/// Event stream related primitives such as `Message` or `Header`.
+pub mod event_stream;
+
 /// Opaque struct used as inner data for the `Unknown` variant defined in enums in
 /// the crate
 ///

sdk/autoscalingplans/src/primitives/event_stream.rs

@@ -0,0 +1 @@
+// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.

sdk/aws-runtime/src/auth/sigv4.rs

@@ -223,8 +223,9 @@ mod event_stream {
     use aws_sigv4::event_stream::{sign_empty_message, sign_message};
     use aws_sigv4::sign::v4;
     use aws_smithy_async::time::SharedTimeSource;
-    use aws_smithy_eventstream::frame::{Message, SignMessage, SignMessageError};
+    use aws_smithy_eventstream::frame::{SignMessage, SignMessageError};
     use aws_smithy_runtime_api::client::identity::Identity;
+    use aws_smithy_types::event_stream::Message;
     use aws_types::region::SigningRegion;
     use aws_types::SigningName;
 
@@ -293,7 +294,8 @@ mod event_stream {
         use crate::auth::sigv4::event_stream::SigV4MessageSigner;
         use aws_credential_types::Credentials;
         use aws_smithy_async::time::SharedTimeSource;
-        use aws_smithy_eventstream::frame::{HeaderValue, Message, SignMessage};
+        use aws_smithy_eventstream::frame::SignMessage;
+        use aws_smithy_types::event_stream::{HeaderValue, Message};
 
         use aws_types::region::Region;
         use aws_types::region::SigningRegion;

sdk/aws-sigv4/Cargo.toml

@@ -57,6 +57,10 @@ path = "../aws-smithy-runtime-api"
 features = ["client"]
 version = "0.57.1"
 
+[dependencies.aws-smithy-types]
+path = "../aws-smithy-types"
+version = "0.57.1"
+
 [dependencies.form_urlencoded]
 version = "1.0"
 optional = true

sdk/aws-sigv4/external-types.toml

@@ -2,6 +2,6 @@ allowed_external_types = [
     # TODO(refactorHttp): Remove this and remove the signing helpers
     "http::request::Request",
     # TODO(https://github.com/awslabs/smithy-rs/issues/1193): Once tooling permits it, only allow the following types in the `event-stream` feature
-    "aws_smithy_eventstream::frame::Message",
+    "aws_smithy_types::event_stream::Message",
     "aws_smithy_runtime_api::client::identity::Identity"
 ]