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use s3s::service::SharedS3Service;
use s3s::{S3Error, S3Result};
use std::ops::Not;
use std::task::{Context, Poll};
use aws_smithy_http::body::SdkBody;
use aws_smithy_http::byte_stream::ByteStream;
use aws_smithy_http::result::ConnectorError;
use hyper::header::HOST;
use hyper::http;
use hyper::service::Service;
use hyper::{Request, Response};
use futures::future::BoxFuture;
#[derive(Clone)]
pub struct Connector(SharedS3Service);
impl From<SharedS3Service> for Connector {
fn from(val: SharedS3Service) -> Self {
Self(val)
}
}
fn on_err(e: S3Error) -> ConnectorError {
let kind = aws_smithy_types::retry::ErrorKind::ServerError;
ConnectorError::other(Box::new(e), Some(kind))
}
impl Service<Request<SdkBody>> for Connector {
type Response = Response<SdkBody>;
type Error = ConnectorError;
type Future = BoxFuture<'static, Result<Self::Response, Self::Error>>;
fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
self.0.poll_ready(cx).map_err(on_err)
}
fn call(&mut self, req: Request<SdkBody>) -> Self::Future {
let req = convert_input(req);
let service = self.0.clone();
Box::pin(async move { convert_output(service.as_ref().call(req).await) })
}
}
fn convert_input(mut req: Request<SdkBody>) -> Request<s3s::Body> {
if req.headers().contains_key(HOST).not() {
let host = auto_host_header(req.uri());
req.headers_mut().insert(HOST, host);
}
req.map(|sdk_body| s3s::Body::from(hyper::Body::wrap_stream(ByteStream::from(sdk_body))))
}
fn convert_output(result: S3Result<Response<s3s::Body>>) -> Result<Response<SdkBody>, ConnectorError> {
match result {
Ok(res) => Ok(res.map(|s3s_body| SdkBody::from(hyper::Body::from(s3s_body)))),
Err(e) => Err(on_err(e)),
}
}
fn auto_host_header(uri: &http::Uri) -> http::HeaderValue {
let hostname = uri.host().expect("authority implies host");
match get_non_default_port(uri) {
Some(port) => http::HeaderValue::try_from(format!("{hostname}:{port}")),
None => http::HeaderValue::from_str(hostname),
}
.expect("uri host is valid header value")
}
fn get_non_default_port(uri: &http::Uri) -> Option<http::uri::Port<&str>> {
match (uri.port().map(|p| p.as_u16()), is_schema_secure(uri)) {
(Some(443), true) => None,
(Some(80), false) => None,
_ => uri.port(),
}
}
fn is_schema_secure(uri: &http::Uri) -> bool {
uri.scheme_str()
.map(|scheme_str| matches!(scheme_str, "wss" | "https"))
.unwrap_or_default()
}