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use crate::error::Error;
use async_trait::async_trait;
use bytes::Bytes;
use futures::{FutureExt, Stream, StreamExt, TryFutureExt, TryStreamExt};
use http::{
header::{HeaderName, HeaderValue},
uri::Scheme,
StatusCode, Uri,
};
use hyper::{
body,
client::{self, Builder, HttpConnector},
};
use hyper_tls::HttpsConnector;
use ipfs_api_prelude::{ApiRequest, Backend, TryFromUri};
use serde::Serialize;
pub struct HyperBackend {
base: Uri,
client: client::Client<HttpsConnector<HttpConnector>, hyper::Body>,
}
impl Default for HyperBackend {
fn default() -> Self {
Self::from_ipfs_config()
.unwrap_or_else(|| Self::from_host_and_port(Scheme::HTTP, "localhost", 5001).unwrap())
}
}
impl TryFromUri for HyperBackend {
fn build_with_base_uri(base: Uri) -> Self {
let client = Builder::default()
.pool_max_idle_per_host(0)
.build(HttpsConnector::new());
HyperBackend { base, client }
}
}
#[async_trait(?Send)]
impl Backend for HyperBackend {
type HttpRequest = http::Request<hyper::Body>;
type HttpResponse = http::Response<hyper::Body>;
type MultipartForm = multipart::client::multipart::Form<'static>;
type Error = Error;
fn build_base_request<Req>(
&self,
req: &Req,
form: Option<Self::MultipartForm>,
) -> Result<Self::HttpRequest, Error>
where
Req: ApiRequest,
{
req.absolute_url(&self.base).and_then(move |url| {
let builder = http::Request::builder();
let builder = builder.method(Req::METHOD.clone()).uri(url);
let req = if let Some(form) = form {
form.set_body_convert::<hyper::Body, multipart::client::multipart::Body>(builder)
} else {
builder.body(hyper::Body::empty())
};
req.map_err(From::from)
})
}
fn get_header<'a>(res: &'a Self::HttpResponse, key: HeaderName) -> Option<&'a HeaderValue> {
res.headers().get(key)
}
async fn request_raw<Req>(
&self,
req: Req,
form: Option<Self::MultipartForm>,
) -> Result<(StatusCode, Bytes), Self::Error>
where
Req: ApiRequest + Serialize,
{
let req = self.build_base_request(&req, form)?;
let res = self.client.request(req).await?;
let status = res.status();
let body = body::to_bytes(res.into_body()).await?;
Ok((status, body))
}
fn response_to_byte_stream(
res: Self::HttpResponse,
) -> Box<dyn Stream<Item = Result<Bytes, Self::Error>> + Unpin> {
Box::new(res.into_body().err_into())
}
fn request_stream<Res, F, OutStream>(
&self,
req: Self::HttpRequest,
process: F,
) -> Box<dyn Stream<Item = Result<Res, Self::Error>> + Unpin>
where
OutStream: Stream<Item = Result<Res, Self::Error>> + Unpin,
F: 'static + Fn(Self::HttpResponse) -> OutStream,
{
let stream = self
.client
.request(req)
.err_into()
.map_ok(move |res| {
match res.status() {
StatusCode::OK => process(res).right_stream(),
// If the server responded with an error status code, the body
// still needs to be read so an error can be built. This block will
// read the entire body stream, then immediately return an error.
//
_ => body::to_bytes(res.into_body())
.boxed()
.map(|maybe_body| match maybe_body {
Ok(body) => Err(Self::process_error_from_body(body)),
Err(e) => Err(e.into()),
})
.into_stream()
.left_stream(),
}
})
.try_flatten_stream();
Box::new(stream)
}
}
|
