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use super::{Node, NodeContext, NodeKind, NodeRequest, NodeResponse};
use crate::{config::DynNode, error::ServiceError};
use futures::Future;
use hyper::header::HOST;
use serde::Deserialize;
use serde_yaml::Value;
use std::{collections::HashMap, pin::Pin, sync::Arc};
#[derive(Deserialize)]
#[serde(transparent)]
struct Hosts(HashMap<String, DynNode>);
pub struct HostsKind;
impl NodeKind for HostsKind {
fn name(&self) -> &'static str {
"hosts"
}
fn instanciate(&self, config: Value) -> anyhow::Result<Arc<dyn Node>> {
Ok(Arc::new(serde_yaml::from_value::<Hosts>(config)?))
}
}
impl Node for Hosts {
fn handle<'a>(
&'a self,
context: &'a mut NodeContext,
request: NodeRequest,
) -> Pin<Box<dyn Future<Output = Result<NodeResponse, ServiceError>> + Send + Sync + 'a>> {
Box::pin(async move {
// use Host header but if missing like in HTTP/2 uses uri authority
let host = request
.headers()
.get(HOST)
.and_then(|e| e.to_str().ok())
.map(remove_port)
.or(request.uri().authority().map(|a| a.host()))
.ok_or(ServiceError::NoHost)?;
let node = self.0.get(host).ok_or(ServiceError::UnknownHost)?;
node.handle(context, request).await
})
}
}
pub fn remove_port(s: &str) -> &str {
s.split_once(":").map(|(s, _)| s).unwrap_or(s)
}
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