feat: init commit

src/app.rs

@@ -0,0 +1,44 @@
+use async_trait::async_trait;
+use http::HeaderName;
+use log::debug;
+use pingora::prelude::{HttpPeer, ProxyHttp, Result, Session};
+
+use super::service::HostConfig;
+
+pub struct ProxyApp {
+    host_configs: Vec<HostConfig>,
+}
+
+impl ProxyApp {
+    pub fn new(host_configs: Vec<HostConfig>) -> Self {
+        ProxyApp { host_configs }
+    }
+}
+
+#[async_trait]
+impl ProxyHttp for ProxyApp {
+    type CTX = ();
+    fn new_ctx(&self) {}
+
+    async fn upstream_peer(&self, session: &mut Session, _ctx: &mut ()) -> Result<Box<HttpPeer>> {
+        let host_header = session
+            .get_header(HeaderName::from_static("host"))
+            .unwrap()
+            .to_str()
+            .expect("get host from http header failed");
+        debug!("host header: {host_header}");
+
+        let host_config = self
+            .host_configs
+            .iter()
+            .find(|x| x.proxy_hostname == host_header)
+            .unwrap_or_else(|| panic!("find config for: {} failed", host_header));
+        let proxy_to = HttpPeer::new(
+            host_config.proxy_addr.as_str(),
+            host_config.proxy_tls,
+            host_config.proxy_hostname.clone(),
+        );
+        let peer = Box::new(proxy_to);
+        Ok(peer)
+    }
+}