Add aws_http_client and bedrock crates (#25490)

This PR adds new `aws_http_client` and `bedrock` crates for supporting
AWS Bedrock.

Pulling out of https://github.com/zed-industries/zed/pull/21092 to make
it easier to land.

Release Notes:

- N/A

---------

Co-authored-by: Shardul Vaidya <cam.v737@gmail.com>
Co-authored-by: Anthony Eid <hello@anthonyeid.me>

crates/aws_http_client/Cargo.toml

@@ -0,0 +1,22 @@
+[package]
+name = "aws_http_client"
+version = "0.1.0"
+edition.workspace = true
+publish.workspace = true
+license = "GPL-3.0-or-later"
+
+[lints]
+workspace = true
+
+[lib]
+path = "src/aws_http_client.rs"
+
+[features]
+default = []
+
+[dependencies]
+aws-smithy-runtime-api.workspace = true
+aws-smithy-types.workspace = true
+futures.workspace = true
+http_client.workspace = true
+tokio = { workspace = true, features = ["rt", "rt-multi-thread"] }

crates/aws_http_client/LICENSE-GPL

@@ -0,0 +1 @@
+../../LICENSE-GPL

crates/aws_http_client/src/aws_http_client.rs

@@ -0,0 +1,118 @@
+use std::fmt;
+use std::sync::Arc;
+
+use aws_smithy_runtime_api::client::http::{
+    HttpClient as AwsClient, HttpConnector as AwsConnector,
+    HttpConnectorFuture as AwsConnectorFuture, HttpConnectorFuture, HttpConnectorSettings,
+    SharedHttpConnector,
+};
+use aws_smithy_runtime_api::client::orchestrator::{HttpRequest as AwsHttpRequest, HttpResponse};
+use aws_smithy_runtime_api::client::result::ConnectorError;
+use aws_smithy_runtime_api::client::runtime_components::RuntimeComponents;
+use aws_smithy_runtime_api::http::StatusCode;
+use aws_smithy_types::body::SdkBody;
+use futures::AsyncReadExt;
+use http_client::{AsyncBody, Inner};
+use http_client::{HttpClient, Request};
+use tokio::runtime::Handle;
+
+struct AwsHttpConnector {
+    client: Arc<dyn HttpClient>,
+    handle: Handle,
+}
+
+impl std::fmt::Debug for AwsHttpConnector {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("AwsHttpConnector").finish()
+    }
+}
+
+impl AwsConnector for AwsHttpConnector {
+    fn call(&self, request: AwsHttpRequest) -> AwsConnectorFuture {
+        let req = match request.try_into_http1x() {
+            Ok(req) => req,
+            Err(err) => {
+                return HttpConnectorFuture::ready(Err(ConnectorError::other(err.into(), None)))
+            }
+        };
+
+        let (parts, body) = req.into_parts();
+
+        let response = self
+            .client
+            .send(Request::from_parts(parts, convert_to_async_body(body)));
+
+        let handle = self.handle.clone();
+
+        HttpConnectorFuture::new(async move {
+            let response = match response.await {
+                Ok(response) => response,
+                Err(err) => return Err(ConnectorError::other(err.into(), None)),
+            };
+            let (parts, body) = response.into_parts();
+            let body = convert_to_sdk_body(body, handle).await;
+
+            Ok(HttpResponse::new(
+                StatusCode::try_from(parts.status.as_u16()).unwrap(),
+                body,
+            ))
+        })
+    }
+}
+
+#[derive(Clone)]
+pub struct AwsHttpClient {
+    client: Arc<dyn HttpClient>,
+    handler: Handle,
+}
+
+impl std::fmt::Debug for AwsHttpClient {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("AwsHttpClient").finish()
+    }
+}
+
+impl AwsHttpClient {
+    pub fn new(client: Arc<dyn HttpClient>, handle: Handle) -> Self {
+        Self {
+            client,
+            handler: handle,
+        }
+    }
+}
+
+impl AwsClient for AwsHttpClient {
+    fn http_connector(
+        &self,
+        _settings: &HttpConnectorSettings,
+        _components: &RuntimeComponents,
+    ) -> SharedHttpConnector {
+        SharedHttpConnector::new(AwsHttpConnector {
+            client: self.client.clone(),
+            handle: self.handler.clone(),
+        })
+    }
+}
+
+pub async fn convert_to_sdk_body(body: AsyncBody, handle: Handle) -> SdkBody {
+    match body.0 {
+        Inner::Empty => SdkBody::empty(),
+        Inner::Bytes(bytes) => SdkBody::from(bytes.into_inner()),
+        Inner::AsyncReader(mut reader) => {
+            let buffer = handle.spawn(async move {
+                let mut buffer = Vec::new();
+                let _ = reader.read_to_end(&mut buffer).await;
+                buffer
+            });
+
+            SdkBody::from(buffer.await.unwrap_or_default())
+        }
+    }
+}
+
+pub fn convert_to_async_body(body: SdkBody) -> AsyncBody {
+    match body.bytes() {
+        Some(bytes) => AsyncBody::from((*bytes).to_vec()),
+        None => AsyncBody::empty(),
+    }
+}