refactor filter system

1 files changed, 45 insertions, 0 deletions

diff --git a/src/filters/hosts.rs b/src/filters/hosts.rs
new file mode 100644
index 0000000..286d478
--- /dev/null
+++ b/src/filters/hosts.rs
@@ -0,0 +1,45 @@
+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 {
+            let host = request
+                .headers()
+                .get(HOST)
+                .and_then(|e| e.to_str().ok())
+                .ok_or(ServiceError::NoHost)?;
+
+            let host = remove_port(&host);
+            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)
+}