Add `aws-smithy-wasm` crate with WASI http client (#3409)

## Motivation and Context
<!--- Why is this change required? What problem does it solve? -->
<!--- If it fixes an open issue, please link to the issue here -->
This change adds a new crate, `aws-smithy-wasm`, that exports a SDK
compatible WASI http client. This is a continuation of the work in #2520
using the now stabilized WASI 0.2.0 interfaces from the [wasi
crate](https://crates.io/crates/wasi). This supports, but does not
finalize the work for #2087

## Description
<!--- Describe your changes in detail -->

Add a new crate, `aws-smithy-wasm` which exports a function
`wasi_http_client` that will provide the user with a WASI compatible
http client. This client is implemented by using the
`wasi::http::outgoing_handler`
[ref](https://docs.rs/wasi/0.12.0+wasi-0.2.0/wasi/http/outgoing_handler/index.html)
along with some utility implementations of `TryFrom` to transform back
and worth between the types from the `http` crate and the `wasi::http`
types. It also exports a unit struct `WasmSleep` that impls the
`AsyncSleep` trait needed by the SDK.

## Testing
<!--- Please describe in detail how you tested your changes -->
<!--- Include details of your testing environment, and the tests you ran
to -->
<!--- see how your change affects other areas of the code, etc. -->
This is tested via an integration test in
`aws/sdk/integration-tests/webassembly` that uses the wasi http-client
to vuild a config and an operation (that is not sent). It is further
tested in a new canary (`wasm_canary`) that calls the S3
`list_objects_v2` API.

## 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._

---------

Co-authored-by: Eduardo Rodrigues <eduardomourar@users.noreply.github.com>
Co-authored-by: Eduardo de Moura Rodrigues <16357187+eduardomourar@users.noreply.github.com>
Co-authored-by: ysaito1001 <awsaito@amazon.com>
Co-authored-by: John DiSanti <jdisanti@amazon.com>
Co-authored-by: Russell Cohen <rcoh@amazon.com>
Co-authored-by: John DiSanti <john@vinylsquid.com>

CHANGELOG.next.toml

@@ -16,3 +16,15 @@ message = "EKS Pod Identity is now supported as part of the default ECS credenti
 references = ["smithy-rs#3416"]
 meta = { "breaking" = false, "bug" = false, "tada" = true }
 author = "jackkleeman"
+
+[[aws-sdk-rust]]
+message = "Added aws-smithy-wasm crate to enable SDK use in WASI compliant environments"
+references = ["smithy-rs#2087", "smithy-rs#2520", "smithy-rs#3409", "aws-sdk-rust#59"]
+meta = { "breaking" = false, "tada" = true, "bug" = false }
+author = "landonxjames"
+
+[[smithy-rs]]
+message = "Added aws-smithy-wasm crate to enable SDK use in WASI compliant environments"
+references = ["smithy-rs#2087", "smithy-rs#2520", "smithy-rs#3409"]
+meta = { "breaking" = false, "tada" = true, "bug" = false, "target" = "client"}
+author = "landonxjames"

aws/rust-runtime/aws-config/Cargo.toml

@@ -1,7 +1,10 @@
 [package]
 name = "aws-config"
 version = "0.0.0-smithy-rs-head"
-authors = ["AWS Rust SDK Team <aws-sdk-rust@amazon.com>", "Russell Cohen <rcoh@amazon.com>"]
+authors = [
+    "AWS Rust SDK Team <aws-sdk-rust@amazon.com>",
+    "Russell Cohen <rcoh@amazon.com>",
+]
 description = "AWS SDK config and credential provider implementations."
 edition = "2021"
 exclude = ["test-data/*", "integration-tests/*"]

aws/sdk/integration-tests/.gitignore

@@ -1,2 +1,3 @@
 Cargo.lock
 target/
+webassembly/src/bindings.rs

aws/sdk/integration-tests/test.sh

@@ -11,6 +11,12 @@ for f in *; do
       echo
       echo "Testing ${f}..."
       echo "###############"
-      cargo test --manifest-path "${f}/Cargo.toml" --all-features
+      if [ "$f" != "webassembly" ]; then
+         cargo test --manifest-path "${f}/Cargo.toml" --all-features
+      else
+         # The webassembly tests use a custom runner set in config.toml that
+         # is not picked up when running the tests outside of the package
+         cd webassembly && cargo component test --all-features --all-targets && cd ..
+      fi
    fi
 done

aws/sdk/integration-tests/webassembly/.cargo/config.toml

@@ -3,3 +3,9 @@ target = "wasm32-wasi"
 
 [target.wasm32-wasi]
 rustflags = ["-C", "opt-level=1"]
+runner = [
+    "wasmtime",
+    "-C", "cache=n",
+    "-S", "preview2=y",
+    "-S", "http=y"
+]

aws/sdk/integration-tests/webassembly/Cargo.toml

@@ -2,7 +2,9 @@
 [package]
 name = "webassembly"
 version = "0.1.0"
-authors = ["Eduardo Rodrigues <16357187+eduardomourar@users.noreply.github.com>"]
+authors = [
+    "Eduardo Rodrigues <16357187+eduardomourar@users.noreply.github.com>",
+]
 description = """
 These tests ensure that things will fail (or not fail) as expected
 when target is set to wasm32-wasi for all SDK and runtime crates.
@@ -12,20 +14,34 @@ license = "Apache-2.0"
 repository = "https://github.com/smithy-lang/smithy-rs"
 publish = false
 
-[lib]
-crate-type = ["cdylib"]
 
+[features]
+default = ["test-util"]
+test-util = []
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
-[dependencies]
-aws-config = { path = "../../build/aws-sdk/sdk/aws-config", default-features = false, features = ["rt-tokio", "behavior-version-latest"]}
+[target.'cfg(target_family = "wasm")'.dependencies]
+aws-config = { path = "../../build/aws-sdk/sdk/aws-config", default-features = false, features = [
+    "rt-tokio",
+    "behavior-version-latest"
+] }
 aws-credential-types = { path = "../../build/aws-sdk/sdk/aws-credential-types", features = ["hardcoded-credentials"] }
 aws-sdk-s3 = { path = "../../build/aws-sdk/sdk/s3", default-features = false }
 aws-smithy-http = { path = "../../build/aws-sdk/sdk/aws-smithy-http" }
 aws-smithy-runtime = { path = "../../build/aws-sdk/sdk/aws-smithy-runtime", features = ["client"] }
 aws-smithy-runtime-api = { path = "../../build/aws-sdk/sdk/aws-smithy-runtime-api", features = ["client"] }
 aws-smithy-types = { path = "../../build/aws-sdk/sdk/aws-smithy-types" }
-aws-types = { path = "../../build/aws-sdk/sdk/aws-types" }
-http = "0.2.8"
-tokio = { version = "1.24.2", features = ["macros", "rt"] }
-tower = "0.4.13"
+aws-smithy-wasm = { path = "../../build/aws-sdk/sdk/aws-smithy-wasm" }
+http = "0.2.9"
+tokio = { version = "1.32.0", features = ["macros", "rt"] }
+
+[target.'cfg(all(target_family = "wasm", target_os = "wasi"))'.dependencies]
+wit-bindgen = { version = "0.16.0", features = ["macros", "realloc"] }
+
+
+[lib]
+crate-type = ["cdylib"]
+
+# metadata used by cargo-component to identify which wit world to embed in the binary
+[package.metadata.component]
+package = "aws:component"

aws/sdk/integration-tests/webassembly/src/default_config.rs

@@ -1,32 +0,0 @@
-/*
- * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
- * SPDX-License-Identifier: Apache-2.0
- */
-
-use crate::http::WasmHttpConnector;
-use aws_config::retry::RetryConfig;
-use aws_credential_types::Credentials;
-use aws_smithy_types::timeout::TimeoutConfig;
-use aws_types::region::Region;
-use std::future::Future;
-
-pub(crate) fn get_default_config() -> impl Future<Output = aws_config::SdkConfig> {
-    aws_config::from_env()
-        .region(Region::from_static("us-west-2"))
-        .credentials_provider(Credentials::from_keys(
-            "access_key",
-            "secret_key",
-            Some("session_token".to_string()),
-        ))
-        .timeout_config(TimeoutConfig::disabled())
-        .retry_config(RetryConfig::disabled())
-        .http_client(WasmHttpConnector::new())
-        .load()
-}
-
-#[tokio::test]
-pub async fn test_default_config() {
-    let shared_config = get_default_config().await;
-    let client = aws_sdk_s3::Client::new(&shared_config);
-    assert_eq!(client.config().region().unwrap().to_string(), "us-west-2")
-}

aws/sdk/integration-tests/webassembly/src/http.rs

@@ -1,62 +0,0 @@
-/*
- * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
- * SPDX-License-Identifier: Apache-2.0
- */
-
-use aws_smithy_runtime_api::client::http::{
-    HttpClient, HttpConnector, HttpConnectorFuture, HttpConnectorSettings, SharedHttpConnector,
-};
-use aws_smithy_runtime_api::client::orchestrator::{HttpRequest, HttpResponse};
-use aws_smithy_runtime_api::client::runtime_components::RuntimeComponents;
-use aws_smithy_runtime_api::shared::IntoShared;
-use aws_smithy_types::body::SdkBody;
-
-pub(crate) fn make_request(_req: HttpRequest) -> Result<HttpResponse, ()> {
-    // Consumers here would pass the HTTP request to
-    // the Wasm host in order to get the response back
-    let body = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>
-    <ListAllMyBucketsResult>
-    <Buckets>
-        <Bucket>
-            <CreationDate>2023-01-23T11:59:03.575496Z</CreationDate>
-            <Name>doc-example-bucket</Name>
-        </Bucket>
-        <Bucket>
-            <CreationDate>2023-01-23T23:32:13.125238Z</CreationDate>
-            <Name>doc-example-bucket2</Name>
-        </Bucket>
-    </Buckets>
-    <Owner>
-        <DisplayName>account-name</DisplayName>
-        <ID>a3a42310-42d0-46d1-9745-0cee9f4fb851</ID>
-    </Owner>
-    </ListAllMyBucketsResult>";
-    Ok(HttpResponse::try_from(http::Response::new(SdkBody::from(body))).unwrap())
-}
-
-#[derive(Default, Debug, Clone)]
-pub(crate) struct WasmHttpConnector;
-impl WasmHttpConnector {
-    pub fn new() -> Self {
-        Self
-    }
-}
-
-impl HttpConnector for WasmHttpConnector {
-    fn call(&self, request: HttpRequest) -> HttpConnectorFuture {
-        println!("Adapter: sending request...");
-        let res = make_request(request).unwrap();
-        println!("{:?}", res);
-        HttpConnectorFuture::new(async move { Ok(res) })
-    }
-}
-
-impl HttpClient for WasmHttpConnector {
-    fn http_connector(
-        &self,
-        _settings: &HttpConnectorSettings,
-        _components: &RuntimeComponents,
-    ) -> SharedHttpConnector {
-        self.clone().into_shared()
-    }
-}

aws/sdk/integration-tests/webassembly/src/http_client.rs

@@ -0,0 +1,54 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+use aws_config::retry::RetryConfig;
+use aws_sdk_s3::operation::list_objects_v2::builders::ListObjectsV2FluentBuilder;
+use aws_sdk_s3::Client;
+use aws_smithy_types::timeout::TimeoutConfig;
+use aws_smithy_wasm::wasi::WasiHttpClientBuilder;
+
+pub(crate) async fn get_default_wasi_config() -> aws_config::SdkConfig {
+    let http_client = WasiHttpClientBuilder::new().build();
+    aws_config::from_env()
+        .region("us-east-2")
+        .timeout_config(TimeoutConfig::disabled())
+        .retry_config(RetryConfig::disabled())
+        .no_credentials()
+        .http_client(http_client)
+        .load()
+        .await
+}
+
+#[tokio::test]
+pub async fn test_default_config() {
+    let shared_config = get_default_wasi_config().await;
+    let client = aws_sdk_s3::Client::new(&shared_config);
+    assert_eq!(client.config().region().unwrap().to_string(), "us-east-2")
+}
+
+async fn s3_list_objects_operation() -> ListObjectsV2FluentBuilder {
+    let shared_config = get_default_wasi_config().await;
+    let client = Client::new(&shared_config);
+    let operation = client
+        .list_objects_v2()
+        .bucket("nara-national-archives-catalog")
+        .delimiter("/")
+        .prefix("authority-records/organization/")
+        .max_keys(5);
+
+    operation
+}
+
+// Test constructing an operation using an SdkConfig with a WASI http client
+// We do not send the request to keep these tests sandboxable, a full test of
+// the client is in the SDK canary.
+#[tokio::test]
+pub async fn test_operation_construction() {
+    let operation = s3_list_objects_operation().await;
+    assert_eq!(
+        operation.get_bucket(),
+        &Some("nara-national-archives-catalog".to_string())
+    );
+}

aws/sdk/integration-tests/webassembly/src/lib.rs

@@ -3,11 +3,9 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-mod default_config;
-mod http;
-mod list_buckets;
+#![allow(dead_code)]
 
-#[tokio::main(flavor = "current_thread")]
-pub async fn main() {
-    crate::list_buckets::s3_list_buckets().await
-}
+#[cfg(target_family = "wasm")]
+mod http_client;
+#[cfg(all(target_family = "wasm", target_os = "wasi"))]
+mod wasi;

aws/sdk/integration-tests/webassembly/src/list_buckets.rs

@@ -1,20 +0,0 @@
-/*
- * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
- * SPDX-License-Identifier: Apache-2.0
- */
-
-pub async fn s3_list_buckets() {
-    use aws_sdk_s3::Client;
-
-    use crate::default_config::get_default_config;
-
-    let shared_config = get_default_config().await;
-    let client = Client::new(&shared_config);
-    let result = client.list_buckets().send().await.unwrap();
-    assert_eq!(result.buckets().len(), 2)
-}
-
-#[tokio::test]
-pub async fn test_s3_list_buckets() {
-    s3_list_buckets().await
-}

aws/sdk/integration-tests/webassembly/src/wasi.rs

@@ -0,0 +1,32 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+// Needed for WASI-compliant environment as it expects specific functions
+// to be exported such as `cabi_realloc`, `_start`, etc.
+
+wit_bindgen::generate!({
+    inline: "
+        package aws:component;
+
+        interface run {
+            run: func() -> result;
+        }
+
+        world main {
+            export run;
+        }
+    ",
+    exports: {
+        "aws:component/run": Component
+    }
+});
+
+struct Component;
+
+impl exports::aws::component::run::Guest for Component {
+    fn run() -> Result<(), ()> {
+        Ok(())
+    }
+}

buildSrc/src/main/kotlin/CrateSet.kt

@@ -70,6 +70,7 @@ object CrateSet {
             "aws-smithy-runtime-api",
             "aws-smithy-types",
             "aws-smithy-types-convert",
+            "aws-smithy-wasm",
             "aws-smithy-xml",
         ).map { Crate(it, version(it)) }
 

rust-runtime/Cargo.toml

@@ -18,6 +18,7 @@ members = [
     "aws-smithy-runtime-api",
     "aws-smithy-types",
     "aws-smithy-types-convert",
+    "aws-smithy-wasm",
     "aws-smithy-mocks-experimental",
     "aws-smithy-xml",
 ]

rust-runtime/aws-smithy-wasm/Cargo.toml

@@ -0,0 +1,29 @@
+[package]
+name = "aws-smithy-wasm"
+version = "0.1.0"
+authors = [
+  "AWS Rust SDK Team <aws-sdk-rust@amazon.com>",
+  "Eduardo Rodrigues <16357187+eduardomourar@users.noreply.github.com>",
+]
+description = "Smithy WebAssembly configuration for smithy-rs."
+edition = "2021"
+license = "Apache-2.0"
+repository = "https://github.com/awslabs/smithy-rs"
+
+[dependencies]
+aws-smithy-runtime-api = { path = "../aws-smithy-runtime-api", features = ["http-1x"]}
+aws-smithy-http = { path = "../aws-smithy-http" }
+aws-smithy-types = { path = "../aws-smithy-types" }
+bytes = "1"
+http = "1.0.0"
+tracing = "0.1.40"
+# Note the wasi crate will only build for target wasm32-wasi, but having a target
+# statement here breaks some of the CI tests, so we leave it with the rest of the deps
+wasi = "0.12.0+wasi-0.2.0"
+
+[package.metadata.docs.rs]
+all-features = true
+targets = ["x86_64-unknown-linux-gnu"]
+cargo-args = ["-Zunstable-options", "-Zrustdoc-scrape-examples"]
+rustdoc-args = ["--cfg", "docsrs"]
+# End of docs.rs metadata

rust-runtime/aws-smithy-wasm/LICENSE

@@ -0,0 +1,175 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
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+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.

rust-runtime/aws-smithy-wasm/README.md

@@ -0,0 +1,7 @@
+# aws-smithy-wasm
+
+WebAssembly and WASI related configuration for service clients generated by [smithy-rs](https://github.com/awslabs/smithy-rs).
+
+<!-- anchor_start:footer -->
+This crate is part of the [AWS SDK for Rust](https://awslabs.github.io/aws-sdk-rust/) and the [smithy-rs](https://github.com/smithy-lang/smithy-rs) code generator. In most cases, it should not be used directly.
+<!-- anchor_end:footer -->

rust-runtime/aws-smithy-wasm/external-types.toml

@@ -0,0 +1,5 @@
+allowed_external_types = [
+    "aws_smithy_runtime_api::client::http::HttpClient",
+    "aws_smithy_runtime_api::client::http::SharedHttpClient",
+    "aws_smithy_runtime_api::client::http::HttpConnector"
+]

rust-runtime/aws-smithy-wasm/src/lib.rs

@@ -0,0 +1,20 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/* Automatically managed default lints */
+#![cfg_attr(docsrs, feature(doc_auto_cfg))]
+/* End of automatically managed default lints */
+#![allow(clippy::derive_partial_eq_without_eq)]
+#![warn(
+    missing_docs,
+    rustdoc::missing_crate_level_docs,
+    unreachable_pub,
+    rust_2018_idioms
+)]
+
+//! Smithy WebAssembly
+
+/// Tools for using Smithy SDKs in WASI environments
+pub mod wasi;

rust-runtime/aws-smithy-wasm/src/wasi.rs

@@ -0,0 +1,350 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+//! WASI HTTP Adapter
+use aws_smithy_http::header::ParseError;
+use aws_smithy_runtime_api::{
+    client::{
+        http::{
+            HttpClient, HttpConnector, HttpConnectorFuture, HttpConnectorSettings,
+            SharedHttpClient, SharedHttpConnector,
+        },
+        orchestrator::HttpRequest,
+        result::ConnectorError,
+        runtime_components::RuntimeComponents,
+    },
+    http::Response,
+    shared::IntoShared,
+};
+use aws_smithy_types::body::SdkBody;
+use bytes::{Bytes, BytesMut};
+use wasi::http::{
+    outgoing_handler,
+    types::{self as wasi_http, OutgoingBody, RequestOptions},
+};
+
+/// Builder for [`WasiHttpClient`]. Currently empty, but allows for future
+/// config options to be added in a backwards compatible manner.
+#[derive(Default, Debug)]
+#[non_exhaustive]
+pub struct WasiHttpClientBuilder {}
+
+impl WasiHttpClientBuilder {
+    /// Creates a new builder.
+    pub fn new() -> Self {
+        Default::default()
+    }
+
+    /// Builds the [`WasiHttpClient`].
+    pub fn build(self) -> SharedHttpClient {
+        let client = WasiHttpClient {};
+        client.into_shared()
+    }
+}
+
+/// An HTTP client that can be used during instantiation of the client SDK in
+/// order to route the HTTP requests through the WebAssembly host. The host must
+/// support the WASI HTTP proposal as defined in the Preview 2 specification.
+#[derive(Debug, Clone)]
+#[non_exhaustive]
+pub struct WasiHttpClient {}
+
+impl HttpClient for WasiHttpClient {
+    fn http_connector(
+        &self,
+        settings: &HttpConnectorSettings,
+        _components: &RuntimeComponents,
+    ) -> SharedHttpConnector {
+        let options = WasiRequestOptions::from(settings);
+        let connector = WasiHttpConnector { options };
+
+        connector.into_shared()
+    }
+}
+
+/// HTTP connector used in WASI environment
+#[derive(Debug, Clone)]
+struct WasiHttpConnector {
+    options: WasiRequestOptions,
+}
+
+impl HttpConnector for WasiHttpConnector {
+    fn call(&self, request: HttpRequest) -> HttpConnectorFuture {
+        tracing::trace!("WasiHttpConnector: sending request {request:?}");
+
+        let client = WasiDefaultClient::new(self.options.clone());
+        let http_req = request.try_into_http1x().expect("Http request invalid");
+        let converted_req = http_req.map(|body| match body.bytes() {
+            Some(value) => Bytes::copy_from_slice(value),
+            None => Bytes::new(),
+        });
+
+        let fut_result = client.handle(converted_req);
+
+        HttpConnectorFuture::new(async move {
+            let fut = fut_result?;
+            let response = fut.map(|body| {
+                if body.is_empty() {
+                    SdkBody::empty()
+                } else {
+                    SdkBody::from(body)
+                }
+            });
+            tracing::trace!("WasiHttpConnector: response received {response:?}");
+
+            let sdk_res = Response::try_from(response)
+                .map_err(|err| ConnectorError::other(err.into(), None))?;
+
+            Ok(sdk_res)
+        })
+    }
+}
+
+/// WASI HTTP client containing the options passed to the outgoing_handler
+struct WasiDefaultClient {
+    options: WasiRequestOptions,
+}
+
+impl WasiDefaultClient {
+    /// Create a new WASI HTTP client.
+    fn new(options: WasiRequestOptions) -> Self {
+        Self { options }
+    }
+
+    /// Make outgoing HTTP request in a WASI environment
+    fn handle(&self, req: http::Request<Bytes>) -> Result<http::Response<Bytes>, ConnectorError> {
+        let req =
+            WasiRequest::try_from(req).map_err(|err| ConnectorError::other(err.into(), None))?;
+
+        let res = outgoing_handler::handle(req.0, self.options.clone().0)
+            .map_err(|err| ConnectorError::other(err.into(), None))?;
+
+        // Right now only synchronous calls can be made through WASI, so we subscribe and
+        // block on the FutureIncomingResponse
+        let subscription = res.subscribe();
+        subscription.block();
+
+        //The FutureIncomingResponse .get() method returns a
+        //Option<Result<Result<IncomingResponse, ErrorCode>, ()>>.
+        //The outer Option ensures readiness which we know is Some because we .block() waiting for it
+        //The outer Result is just a singleton enforcer so we can only get the response once
+        //The inner Result indicates whether the HTTP call was sent/received successfully (not the 200 succes of the call)
+        let incoming_res = res
+            .get()
+            .expect("Http response not ready")
+            .expect("Http response accessed more than once")
+            .map_err(|err| ConnectorError::other(err.into(), None))?;
+
+        let response = http::Response::try_from(WasiResponse(incoming_res))
+            .map_err(|err| ConnectorError::other(err.into(), None))?;
+
+        Ok(response)
+    }
+}
+
+/// Wrapper for the WASI RequestOptions type to allow us to impl Clone
+#[derive(Debug)]
+struct WasiRequestOptions(Option<outgoing_handler::RequestOptions>);
+
+impl From<&HttpConnectorSettings> for WasiRequestOptions {
+    fn from(value: &HttpConnectorSettings) -> Self {
+        //The WASI Duration is nanoseconds represented as u64
+        //Note: that the HttpConnectorSettings provides nanoseconds as u128
+        //so here we are clamping to u64::MAX if the value is above that
+        let connect_timeout = value
+            .connect_timeout()
+            .map(|dur| u64::try_from(dur.as_nanos()).unwrap_or(u64::MAX));
+        let read_timeout = value
+            .read_timeout()
+            .map(|dur| u64::try_from(dur.as_nanos()).unwrap_or(u64::MAX));
+
+        //Note: these only fail if setting this particular type of timeout is not
+        //supported. Spec compliant runtimes should always support these so it is
+        //unlikely to be an issue.
+        let wasi_http_opts = wasi_http::RequestOptions::new();
+        wasi_http_opts
+            .set_connect_timeout(connect_timeout)
+            .expect("Connect timeout not supported");
+        wasi_http_opts
+            .set_first_byte_timeout(read_timeout)
+            .expect("Read timeout not supported");
+
+        WasiRequestOptions(Some(wasi_http_opts))
+    }
+}
+//The WASI RequestOptions type doesn't impl copy or clone but the outgoing_handler::handle method
+//takes ownership, so we impl it on this wrapper type
+impl Clone for WasiRequestOptions {
+    fn clone(&self) -> Self {
+        //Note none of the expects here should ever trigger since all of the values passed in are from
+        //the existing RequestOptions that is being cloned and should be valid
+        let new_opts = if let Some(opts) = &self.0 {
+            let new_opts = RequestOptions::new();
+            new_opts
+                .set_between_bytes_timeout(opts.between_bytes_timeout())
+                .expect("Between bytes timeout");
+            new_opts
+                .set_connect_timeout(opts.connect_timeout())
+                .expect("Connect timeout");
+            new_opts
+                .set_first_byte_timeout(opts.first_byte_timeout())
+                .expect("First byte timeout");
+
+            Some(new_opts)
+        } else {
+            None
+        };
+
+        Self(new_opts)
+    }
+}
+
+/// Wrapper to allow converting between HTTP Request types and WASI Request types
+#[derive(Debug)]
+struct WasiRequest(outgoing_handler::OutgoingRequest);
+
+impl TryFrom<http::Request<Bytes>> for WasiRequest {
+    type Error = ParseError;
+
+    fn try_from(value: http::Request<Bytes>) -> Result<Self, Self::Error> {
+        let (parts, body) = value.into_parts();
+        let method = WasiMethod::try_from(parts.method)?;
+        let path_with_query = parts.uri.path_and_query().map(|path| path.as_str());
+        let headers = WasiHeaders::try_from(parts.headers)?;
+        let scheme = match parts.uri.scheme_str().unwrap_or("") {
+            "http" => Some(&wasi_http::Scheme::Http),
+            "https" => Some(&wasi_http::Scheme::Https),
+            _ => None,
+        };
+        let authority = parts.uri.authority().map(|auth| auth.as_str());
+
+        let request = wasi_http::OutgoingRequest::new(headers.0);
+        request
+            .set_scheme(scheme)
+            .map_err(|_| ParseError::new("Failed to set HTTP scheme"))?;
+        request
+            .set_method(&method.0)
+            .map_err(|_| ParseError::new("Failed to set HTTP method"))?;
+        request
+            .set_path_with_query(path_with_query)
+            .map_err(|_| ParseError::new("Failed to set HTTP path"))?;
+        request
+            .set_authority(authority)
+            .map_err(|_| ParseError::new("Failed to set HTTP authority"))?;
+
+        let request_body = request.body().expect("Body accessed more than once");
+
+        let request_stream = request_body
+            .write()
+            .expect("Output stream accessed more than once");
+
+        request_stream
+            .blocking_write_and_flush(&body)
+            .map_err(|_| ParseError::new("Failed to write HTTP body"))?;
+
+        //The OutputStream is a child resource: it must be dropped
+        //before the parent OutgoingBody resource is dropped (or finished),
+        //otherwise the OutgoingBody drop or finish will trap.
+        drop(request_stream);
+
+        OutgoingBody::finish(request_body, None)
+            .map_err(|_| ParseError::new("Failed to finalize HTTP body"))?;
+
+        Ok(WasiRequest(request))
+    }
+}
+
+/// Wrapper to allow converting between HTTP Methods and WASI Methods
+struct WasiMethod(wasi_http::Method);
+
+impl TryFrom<http::Method> for WasiMethod {
+    type Error = ParseError;
+
+    fn try_from(method: http::Method) -> Result<Self, Self::Error> {
+        Ok(Self(match method {
+            http::Method::GET => wasi_http::Method::Get,
+            http::Method::POST => wasi_http::Method::Post,
+            http::Method::PUT => wasi_http::Method::Put,
+            http::Method::DELETE => wasi_http::Method::Delete,
+            http::Method::PATCH => wasi_http::Method::Patch,
+            http::Method::CONNECT => wasi_http::Method::Connect,
+            http::Method::TRACE => wasi_http::Method::Trace,
+            http::Method::HEAD => wasi_http::Method::Head,
+            http::Method::OPTIONS => wasi_http::Method::Options,
+            _ => return Err(ParseError::new("failed due to unsupported method, currently supported methods are: GET, POST, PUT, DELETE, PATCH, CONNECT, TRACE, HEAD, and OPTIONS")),
+        }))
+    }
+}
+
+/// Wrapper to allow converting between HTTP Response types and WASI Response types
+struct WasiResponse(wasi_http::IncomingResponse);
+
+impl TryFrom<WasiResponse> for http::Response<Bytes> {
+    type Error = ParseError;
+
+    fn try_from(value: WasiResponse) -> Result<Self, Self::Error> {
+        let response = value.0;
+
+        let status = response.status();
+
+        //This headers resource is a child: it must be dropped before the parent incoming-response is dropped.
+        //The drop happens via the consuming iterator used below
+        let headers = response.headers().entries();
+
+        let res_build = headers
+            .into_iter()
+            .fold(http::Response::builder().status(status), |rb, header| {
+                rb.header(header.0, header.1)
+            });
+
+        let body_incoming = response.consume().expect("Consume called more than once");
+
+        //The input-stream resource is a child: it must be dropped before the parent
+        //incoming-body is dropped, or consumed by incoming-body.finish.
+        //That drop is done explicitly below
+        let body_stream = body_incoming
+            .stream()
+            .expect("Stream accessed more than once");
+
+        let mut body = BytesMut::new();
+
+        //blocking_read blocks until at least one byte is available
+        while let Ok(stream_bytes) = body_stream.blocking_read(u64::MAX) {
+            body.extend_from_slice(stream_bytes.as_slice())
+        }
+
+        drop(body_stream);
+
+        let res = res_build
+            .body(body.freeze())
+            .map_err(|err| ParseError::new(err.to_string()))?;
+
+        Ok(res)
+    }
+}
+
+/// Wrapper to allow converting between HTTP headers and WASI headers
+struct WasiHeaders(wasi_http::Fields);
+
+impl TryFrom<http::HeaderMap> for WasiHeaders {
+    type Error = ParseError;
+
+    fn try_from(headers: http::HeaderMap) -> Result<Self, Self::Error> {
+        let entries = headers
+            .iter()
+            .map(|(name, value)| {
+                (
+                    name.to_string(),
+                    value.to_str().unwrap().as_bytes().to_vec(),
+                )
+            })
+            .collect::<Vec<_>>();
+
+        let fields = wasi_http::Fields::from_list(&entries)
+            .map_err(|err| ParseError::new(err.to_string()))?;
+
+        Ok(Self(fields))
+    }
+}

tools/ci-build/Dockerfile

@@ -15,9 +15,9 @@ RUN yum -y updateinfo
 FROM bare_base_image as musl_toolchain
 RUN yum -y install --allowerasing tar gzip gcc make
 RUN curl https://musl.libc.org/releases/musl-1.2.3.tar.gz -o musl-1.2.3.tar.gz \
-  && ls \
-  && tar xvzf musl-1.2.3.tar.gz \
-  && (cd musl-1.2.3 && ./configure && make install)
+    && ls \
+    && tar xvzf musl-1.2.3.tar.gz \
+    && (cd musl-1.2.3 && ./configure && make install)
 
 #
 # Rust & Tools Installation Stage
@@ -121,17 +121,14 @@ ARG wasm_pack_version=0.11.0
 RUN cargo install wasm-pack --locked --version ${wasm_pack_version}
 
 FROM install_rust AS wasmtime
-ARG wasmtime_precompiled_url=https://github.com/bytecodealliance/wasmtime/releases/download/v7.0.0/wasmtime-v7.0.0-x86_64-linux.tar.xz
-ARG wasmtime_precompiled_sha256=b8a1c97f9107c885ea73a5c38677d0d340a7c26879d366e8a5f3dce84cffec99
-RUN set -eux; \
-    curl "${wasmtime_precompiled_url}" -L -o wasmtime.xz; \
-    echo "${wasmtime_precompiled_sha256} wasmtime.xz" | sha256sum --check; \
-    tar xf wasmtime.xz; \
-    mv wasmtime-v*/wasmtime /opt;
+ARG cargo_wasmtime_version=18.0.1
+ARG rust_nightly_version
+RUN cargo install wasmtime-cli --features="component-model" --locked --version ${cargo_wasmtime_version}
 
-FROM install_rust AS cargo_wasi
-ARG cargo_wasi_version=0.1.27
-RUN cargo install cargo-wasi --locked --version ${cargo_wasi_version}
+FROM install_rust AS cargo_component
+ARG cargo_component_version=0.7.1
+ARG rust_nightly_version
+RUN cargo +${rust_nightly_version} install cargo-component --locked --version ${cargo_component_version}
 
 FROM install_rust AS cargo_semver_checks
 ARG cargo_semver_checks_version=0.24.1
@@ -182,8 +179,8 @@ COPY --chown=build:build --from=cargo_minimal_versions /opt/cargo/bin/cargo-mini
 COPY --chown=build:build --from=cargo_check_external_types /opt/cargo/bin/cargo-check-external-types /opt/cargo/bin/cargo-check-external-types
 COPY --chown=build:build --from=maturin /opt/cargo/bin/maturin /opt/cargo/bin/maturin
 COPY --chown=build:build --from=wasm_pack /opt/cargo/bin/wasm-pack /opt/cargo/bin/wasm-pack
-COPY --chown=build:build --from=wasmtime /opt/wasmtime /opt/cargo/bin/wasmtime
-COPY --chown=build:build --from=cargo_wasi /opt/cargo/bin/cargo-wasi /opt/cargo/bin/cargo-wasi
+COPY --chown=build:build --from=wasmtime /opt/cargo/bin/wasmtime /opt/cargo/bin/wasmtime
+COPY --chown=build:build --from=cargo_component /opt/cargo/bin/cargo-component /opt/cargo/bin/cargo-component
 COPY --chown=build:build --from=install_rust /opt/rustup /opt/rustup
 COPY --chown=build:build --from=cargo_semver_checks /opt/cargo/bin/cargo-semver-checks /opt/cargo/bin/cargo-semver-checks
 COPY --chown=build:build --from=cargo_mdbook /opt/cargo/bin/mdbook /opt/cargo/bin/mdbook

tools/ci-cdk/.gitignore

@@ -8,3 +8,6 @@ build
 .cdk.staging
 cdk.out
 cdk-outputs.json
+
+# Generated Rust file
+canary-wasm/src/bindings.rs

tools/ci-cdk/README.md

@@ -24,7 +24,7 @@ cd canary-runner
 cargo run -- run --sdk-release-tag <version> --musl --cdk-output ../cdk-outputs.json
 ```
 
-__NOTE:__ You may want to add a `--profile` to the `deploy` command to select a specific credential
+**NOTE:** You may want to add a `--profile` to the deploy command to select a specific credential
 profile to deploy to if you don't want to use the default.
 
 Also, if this is a new test AWS account, be sure it CDK bootstrap it before attempting to deploy.

tools/ci-cdk/canary-lambda/src/canary.rs

@@ -12,7 +12,7 @@ use aws_config::SdkConfig;
 use tracing::{info_span, Instrument};
 
 use crate::current_canary::paginator_canary;
-use crate::current_canary::{s3_canary, transcribe_canary};
+use crate::current_canary::{s3_canary, transcribe_canary, wasm_canary};
 
 #[macro_export]
 macro_rules! mk_canary {
@@ -35,6 +35,7 @@ pub fn get_canaries_to_run(
         paginator_canary::mk_canary(&sdk_config, &env),
         s3_canary::mk_canary(&sdk_config, &env),
         transcribe_canary::mk_canary(&sdk_config, &env),
+        wasm_canary::mk_canary(&sdk_config, &env),
     ];
 
     canaries

tools/ci-cdk/canary-lambda/src/latest.rs

@@ -6,3 +6,4 @@
 pub(crate) mod paginator_canary;
 pub(crate) mod s3_canary;
 pub(crate) mod transcribe_canary;
+pub(crate) mod wasm_canary;

tools/ci-cdk/canary-lambda/src/latest/wasm_canary.rs

@@ -0,0 +1,172 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+use crate::{mk_canary, CanaryEnv};
+
+use aws_config::SdkConfig;
+use wasmtime::component::{bindgen, Component, Linker};
+use wasmtime::{Engine, Store};
+use wasmtime_wasi::preview2::WasiCtxBuilder;
+
+mk_canary!("wasm", |_sdk_config: &SdkConfig, _env: &CanaryEnv| {
+    wasm_canary()
+});
+
+//This macro creates bindings to call the wasm functions in Rust
+bindgen!({
+    world: "canary-world",
+    path: "../canary-wasm/wit/component.wit",
+    async: true
+});
+
+struct WasiHostCtx {
+    preview2_ctx: wasmtime_wasi::preview2::WasiCtx,
+    preview2_table: wasmtime::component::ResourceTable,
+    wasi_http_ctx: wasmtime_wasi_http::WasiHttpCtx,
+}
+
+impl wasmtime_wasi::preview2::WasiView for WasiHostCtx {
+    fn table(&self) -> &wasmtime::component::ResourceTable {
+        &self.preview2_table
+    }
+
+    fn ctx(&self) -> &wasmtime_wasi::preview2::WasiCtx {
+        &self.preview2_ctx
+    }
+
+    fn table_mut(&mut self) -> &mut wasmtime::component::ResourceTable {
+        &mut self.preview2_table
+    }
+
+    fn ctx_mut(&mut self) -> &mut wasmtime_wasi::preview2::WasiCtx {
+        &mut self.preview2_ctx
+    }
+}
+
+impl wasmtime_wasi_http::types::WasiHttpView for WasiHostCtx {
+    fn ctx(&mut self) -> &mut wasmtime_wasi_http::WasiHttpCtx {
+        &mut self.wasi_http_ctx
+    }
+
+    fn table(&mut self) -> &mut wasmtime::component::ResourceTable {
+        &mut self.preview2_table
+    }
+}
+
+pub async fn wasm_canary() -> anyhow::Result<()> {
+    let wasm_bin_path = std::env::current_dir()
+        .expect("Current dir")
+        .join("aws_sdk_rust_lambda_canary_wasm.wasm");
+
+    // Create a Wasmtime Engine configured to run Components
+    let engine = Engine::new(
+        wasmtime::Config::new()
+            .wasm_component_model(true)
+            .async_support(true),
+    )?;
+
+    // Create our component from the wasm file
+    let component = Component::from_file(&engine, wasm_bin_path)?;
+
+    // Create the linker and link in the necessary WASI bindings
+    let mut linker: Linker<WasiHostCtx> = Linker::new(&engine);
+    link_all_the_things(&mut linker);
+
+    // Configure and create a `WasiCtx`, which WASI functions need access to
+    // through the host state of the store (which in this case is the host state
+    // of the store)
+    let wasi_ctx = WasiCtxBuilder::new()
+        .inherit_stderr()
+        .inherit_stdout()
+        .build();
+
+    let host_ctx = WasiHostCtx {
+        preview2_ctx: wasi_ctx,
+        preview2_table: wasmtime_wasi::preview2::ResourceTable::new(),
+        wasi_http_ctx: wasmtime_wasi_http::WasiHttpCtx {},
+    };
+
+    let mut store: Store<WasiHostCtx> = Store::new(&engine, host_ctx);
+
+    // Instantiate our module with the bindgen! bindings
+    let (bindings, _) = CanaryWorld::instantiate_async(&mut store, &component, &linker).await?;
+
+    let canary_interface = bindings.aws_component_canary_interface();
+    let api_result = canary_interface
+        .call_run_canary(store)
+        .await?
+        .map_err(anyhow::Error::msg)?;
+
+    // Asserting on the post FFI result to confirm everything in the wasm module worked
+    assert!(!api_result.is_empty());
+
+    Ok(())
+}
+
+/// This function adds all of the WASI bindings to the linker
+fn link_all_the_things(linker: &mut Linker<WasiHostCtx>) {
+    //IO
+    wasmtime_wasi::preview2::bindings::io::poll::add_to_linker(linker, |cx| cx)
+        .expect("Failed to link Poll");
+    wasmtime_wasi::preview2::bindings::io::error::add_to_linker(linker, |cx| cx)
+        .expect("Failed to link Error");
+    wasmtime_wasi::preview2::bindings::io::streams::add_to_linker(linker, |cx| cx)
+        .expect("Failed to link Streams");
+
+    //Random
+    wasmtime_wasi::preview2::bindings::random::random::add_to_linker(linker, |cx| cx)
+        .expect("Failed to link Random");
+
+    //Clocks
+    wasmtime_wasi::preview2::bindings::wasi::clocks::monotonic_clock::add_to_linker(linker, |cx| {
+        cx
+    })
+    .expect("Failed to link Clock");
+    wasmtime_wasi::preview2::bindings::wasi::clocks::wall_clock::add_to_linker(linker, |cx| cx)
+        .expect("Failed to link Wall Clock");
+
+    //Filesystem
+    wasmtime_wasi::preview2::bindings::filesystem::types::add_to_linker(linker, |cx| cx)
+        .expect("Failed to link Filesystem Types");
+    wasmtime_wasi::preview2::bindings::filesystem::preopens::add_to_linker(linker, |cx| cx)
+        .expect("Failed to link Filesystem Preopen");
+
+    //CLI
+    wasmtime_wasi::preview2::bindings::wasi::cli::environment::add_to_linker(linker, |cx| cx)
+        .expect("Failed to link Environment");
+    wasmtime_wasi::preview2::bindings::wasi::cli::exit::add_to_linker(linker, |cx| cx)
+        .expect("Failed to link Environment");
+    wasmtime_wasi::preview2::bindings::wasi::cli::stdin::add_to_linker(linker, |cx| cx)
+        .expect("Failed to link Stdin");
+    wasmtime_wasi::preview2::bindings::wasi::cli::stdout::add_to_linker(linker, |cx| cx)
+        .expect("Failed to link Stdout");
+    wasmtime_wasi::preview2::bindings::wasi::cli::stderr::add_to_linker(linker, |cx| cx)
+        .expect("Failed to link Stderr");
+
+    // CLI Terminal
+    wasmtime_wasi::preview2::bindings::wasi::cli::terminal_input::add_to_linker(linker, |cx| cx)
+        .expect("Failed to link Terminal Input");
+    wasmtime_wasi::preview2::bindings::wasi::cli::terminal_output::add_to_linker(linker, |cx| cx)
+        .expect("Failed to link Terminal Output");
+    wasmtime_wasi::preview2::bindings::wasi::cli::terminal_stdin::add_to_linker(linker, |cx| cx)
+        .expect("Failed to link Terminal Stdin");
+    wasmtime_wasi::preview2::bindings::wasi::cli::terminal_stdout::add_to_linker(linker, |cx| cx)
+        .expect("Failed to link Terminal Stdout");
+    wasmtime_wasi::preview2::bindings::wasi::cli::terminal_stderr::add_to_linker(linker, |cx| cx)
+        .expect("Failed to link Terminal Stderr");
+
+    //HTTP
+    wasmtime_wasi_http::bindings::http::types::add_to_linker(linker, |cx| cx)
+        .expect("Failed to link HTTP Types");
+    wasmtime_wasi_http::bindings::http::outgoing_handler::add_to_linker(linker, |cx| cx)
+        .expect("Failed to link HTTP Outgoing Handler");
+}
+
+// #[ignore]
+#[cfg(test)]
+#[tokio::test]
+async fn test_wasm_canary() {
+    wasm_canary().await.expect("Wasm return")
+}

tools/ci-cdk/canary-lambda/src/main.rs

@@ -123,7 +123,7 @@ async fn lambda_main(sdk_config: SdkConfig) -> Result<Value, Error> {
 }
 
 async fn canary_result(handle: JoinHandle<anyhow::Result<()>>) -> Result<(), String> {
-    match timeout(Duration::from_secs(20), handle).await {
+    match timeout(Duration::from_secs(180), handle).await {
         Err(_timeout) => Err("canary timed out".into()),
         Ok(Ok(result)) => match result {
             Ok(_) => Ok(()),

tools/ci-cdk/canary-runner/src/build_bundle.rs

@@ -55,6 +55,10 @@ tokio-stream = "0"
 tracing-texray = "0.1.1"
 reqwest = { version = "0.11.14", features = ["rustls-tls"], default-features = false }
 edit-distance = "2"
+wit-bindgen = { version = "0.16.0", features = ["macros", "realloc"] }
+wasmtime = { version = "17.0.1", features = ["component-model"] }
+wasmtime-wasi = "17.0.1"
+wasmtime-wasi-http = "17.0.1"
 "#;
 
 const REQUIRED_SDK_CRATES: &[&str] = &[
@@ -62,6 +66,7 @@ const REQUIRED_SDK_CRATES: &[&str] = &[
     "aws-sdk-s3",
     "aws-sdk-ec2",
     "aws-sdk-transcribestreaming",
+    "aws-smithy-wasm",
 ];
 
 // The elements in this `Vec` should be sorted in an ascending order by the release date.
@@ -258,6 +263,10 @@ pub async fn build_bundle(opt: BuildBundleArgs) -> Result<Option<PathBuf>> {
     let crate_manifest_content = generate_crate_manifest(crate_source)?;
     fs::write(&manifest_path, crate_manifest_content).context("failed to write Cargo.toml")?;
 
+    let wasm_manifest_path = std::env::current_dir()
+        .expect("Current dir")
+        .join("../canary-wasm/Cargo.toml");
+
     if !opt.manifest_only {
         // Compile the canary Lambda
         let mut command = Command::new("cargo");
@@ -271,6 +280,16 @@ pub async fn build_bundle(opt: BuildBundleArgs) -> Result<Option<PathBuf>> {
         }
         handle_failure("cargo build", &command.output()?)?;
 
+        // Compile the wasm canary to a .wasm binary
+        let mut wasm_command = Command::new("cargo");
+        wasm_command
+            .arg("component")
+            .arg("build")
+            .arg("--release")
+            .arg("--manifest-path")
+            .arg(&wasm_manifest_path);
+        handle_failure("cargo component build", &wasm_command.output()?)?;
+
         // Bundle the Lambda
         let repository_root = find_git_repository_root("smithy-rs", canary_path)?;
         let target_path = {
@@ -280,6 +299,14 @@ pub async fn build_bundle(opt: BuildBundleArgs) -> Result<Option<PathBuf>> {
             }
             path.join("release")
         };
+        let wasm_bin_path = {
+            repository_root
+                .join("tools")
+                .join("target")
+                .join("wasm32-wasi")
+                .join("release")
+                .join("aws_sdk_rust_lambda_canary_wasm.wasm")
+        };
         let bin_path = target_path.join("bootstrap");
         let bundle_path = target_path.join(name_bundle(
             &bin_path,
@@ -289,6 +316,7 @@ pub async fn build_bundle(opt: BuildBundleArgs) -> Result<Option<PathBuf>> {
 
         let zip_file = fs::File::create(&bundle_path).context(here!())?;
         let mut zip = zip::ZipWriter::new(zip_file);
+        //Write the canary bin to the zip
         zip.start_file(
             "bootstrap",
             zip::write::FileOptions::default().unix_permissions(0o755),
@@ -296,6 +324,15 @@ pub async fn build_bundle(opt: BuildBundleArgs) -> Result<Option<PathBuf>> {
         .context(here!())?;
         zip.write_all(&fs::read(&bin_path).context(here!("read target"))?)
             .context(here!())?;
+
+        // Write the wasm bin to the zip
+        zip.start_file(
+            "aws_sdk_rust_lambda_canary_wasm.wasm",
+            zip::write::FileOptions::default().unix_permissions(0o644),
+        )
+        .context(here!())?;
+        zip.write_all(&fs::read(wasm_bin_path).context(here!("read wasm bin"))?)
+            .context(here!())?;
         zip.finish().context(here!())?;
 
         println!(
@@ -453,10 +490,15 @@ tokio-stream = "0"
 tracing-texray = "0.1.1"
 reqwest = { version = "0.11.14", features = ["rustls-tls"], default-features = false }
 edit-distance = "2"
+wit-bindgen = { version = "0.16.0", features = ["macros", "realloc"] }
+wasmtime = { version = "17.0.1", features = ["component-model"] }
+wasmtime-wasi = "17.0.1"
+wasmtime-wasi-http = "17.0.1"
 aws-config = { path = "some/sdk/path/aws-config", features = ["behavior-version-latest"] }
 aws-sdk-s3 = { path = "some/sdk/path/s3" }
 aws-sdk-ec2 = { path = "some/sdk/path/ec2" }
 aws-sdk-transcribestreaming = { path = "some/sdk/path/transcribestreaming" }
+aws-smithy-wasm = { path = "some/sdk/path/aws-smithy-wasm" }
 
 [features]
 latest = []
@@ -518,10 +560,15 @@ tokio-stream = "0"
 tracing-texray = "0.1.1"
 reqwest = { version = "0.11.14", features = ["rustls-tls"], default-features = false }
 edit-distance = "2"
+wit-bindgen = { version = "0.16.0", features = ["macros", "realloc"] }
+wasmtime = { version = "17.0.1", features = ["component-model"] }
+wasmtime-wasi = "17.0.1"
+wasmtime-wasi-http = "17.0.1"
 aws-config = { version = "0.46.0", features = ["behavior-version-latest"] }
 aws-sdk-s3 = "0.20.0"
 aws-sdk-ec2 = "0.19.0"
 aws-sdk-transcribestreaming = "0.16.0"
+aws-smithy-wasm = "0.1.0"
 
 [features]
 latest = []
@@ -538,6 +585,7 @@ default = ["latest"]
                         crate_version("aws-sdk-s3", "0.20.0"),
                         crate_version("aws-sdk-ec2", "0.19.0"),
                         crate_version("aws-sdk-transcribestreaming", "0.16.0"),
+                        crate_version("aws-smithy-wasm", "0.1.0"),
                     ]
                     .into_iter()
                     .collect(),

tools/ci-cdk/canary-runner/src/run.rs

@@ -388,7 +388,7 @@ async fn create_lambda_fn(
         )
         .publish(true)
         .environment(env_builder.build())
-        .timeout(60)
+        .timeout(180)
         .send()
         .await
         .context(here!("failed to create canary Lambda function"))?;

tools/ci-cdk/canary-wasm/Cargo.toml

@@ -0,0 +1,25 @@
+
+# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+# SPDX-License-Identifier: Apache-2.0
+#
+# IMPORTANT: Don't edit this file directly! Run `canary-runner build-bundle` to modify this file instead.
+[package]
+name = "aws-sdk-rust-lambda-canary-wasm"
+version = "0.1.0"
+edition = "2021"
+license = "Apache-2.0"
+
+[dependencies]
+tokio = { version = "1.36.0", features = ["macros", "rt", "time"] }
+wit-bindgen = { version = "0.16.0", features = ["macros", "realloc"] }
+aws-config = { path = "../../../aws/sdk/build/aws-sdk/sdk/aws-config", default-features = false, features = ["behavior-version-latest"] }
+aws-sdk-s3 = { path = "../../../aws/sdk/build/aws-sdk/sdk/s3", default-features = false }
+aws-smithy-wasm = { path = "../../../aws/sdk/build/aws-sdk/sdk/aws-smithy-wasm" }
+aws-smithy-async = { path = "../../../aws/sdk/build/aws-sdk/sdk/aws-smithy-async", default-features = false, features = ["rt-tokio"]}
+
+[lib]
+crate-type = ["cdylib"]
+
+# metadata used by cargo-component to identify which wit world to embed in the binary
+[package.metadata.component]
+package = "aws:component"

tools/ci-cdk/canary-wasm/src/lib.rs

@@ -0,0 +1,63 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+use aws_config::Region;
+use aws_sdk_s3 as s3;
+use aws_smithy_async::rt::sleep::TokioSleep;
+use aws_smithy_wasm::wasi::WasiHttpClientBuilder;
+
+//Generates the Rust bindings from the wit file
+wit_bindgen::generate!({
+    world: "canary-world",
+    exports: {
+        "aws:component/canary-interface": Component
+    }
+});
+
+struct Component;
+
+impl exports::aws::component::canary_interface::Guest for Component {
+    fn run_canary() -> Result<Vec<String>, String> {
+        let rt = tokio::runtime::Builder::new_current_thread()
+            .enable_time()
+            .build()
+            .expect("Failed to generate runtime");
+        let res = rt.block_on(run_canary())?;
+        Ok(res)
+    }
+}
+
+async fn run_canary() -> Result<Vec<String>, String> {
+    let http_client = WasiHttpClientBuilder::new().build();
+    let sleep = TokioSleep::new();
+    let config = aws_config::from_env()
+        .region(Region::new("us-east-2"))
+        .no_credentials()
+        .http_client(http_client)
+        .sleep_impl(sleep)
+        .load()
+        .await;
+
+    let client = s3::Client::new(&config);
+    let result = client
+        .list_objects_v2()
+        .bucket("nara-national-archives-catalog")
+        .delimiter("/")
+        .prefix("authority-records/organization/")
+        .max_keys(5)
+        .send()
+        .await
+        .expect("Failed to ListObjects");
+
+    //For ease of modeling the return we just extract the keys from the objects
+    let object_names: Vec<String> = result
+        .contents
+        .expect("No S3 Objects")
+        .iter()
+        .map(|obj| obj.key().expect("Object has no name").to_string())
+        .collect();
+
+    Ok(object_names)
+}

tools/ci-cdk/canary-wasm/wit/component.wit

@@ -0,0 +1,15 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package aws:component;
+ 
+interface canary-interface {
+    run-canary: func() -> result<list<string>, string>;
+}
+ 
+world canary-world {
+    export canary-interface;
+}
+     

tools/ci-scripts/check-aws-config

@@ -55,6 +55,6 @@ cargo check --target wasm32-wasi --no-default-features
 # TODO(https://github.com/smithy-lang/smithy-rs/issues/2499): Uncomment the following once aws-config tests compile for WASM
 # echo "${C_YELLOW}## Testing the wasm32-unknown-unknown and wasm32-wasi targets${C_RESET}"
 # wasm-pack test --node -- --no-default-features
-# cargo wasi test --no-default-features
+# cargo test --target wasm32-wasi --no-default-features
 
 popd &>/dev/null

tools/ci-scripts/check-aws-sdk-standalone-integration-tests

@@ -39,4 +39,10 @@ find "${tmp_dir}"
 
 pushd "${tmp_dir}/aws/sdk/integration-tests"
 cargo check --tests --all-features
+
+# Running WebAssembly (WASI) specific integration tests
+pushd "${tmp_dir}/aws/sdk/integration-tests/webassembly" &>/dev/null
+cargo check --tests --all-features
+
+popd
 popd