fix(app-server): restrict proxy ports

Author: OnlyYu1996

src/cortex-app-server/src/api/proxy.rs

@@ -4,20 +4,20 @@ use axum::{Json, extract::Path};
 
 use crate::error::{AppError, AppResult};
 
+const ALLOWED_PROXY_PORTS: &[u16] = &[
+    3000, 3001, 3002, 3003, // React、Next.js
+    4000, 4173, 4200, // Angular、Vite 预览
+    5000, 5173, 5174, // Vite、Flask
+    8000, 8080, 8081, // Django、通用开发服务
+];
+
 /// List open ports on localhost.
 pub async fn list_open_ports() -> Json<Vec<u16>> {
-    let ports_to_check: Vec<u16> = vec![
-        3000, 3001, 3002, 3003, // React, Next.js
-        4000, 4173, 4200, // Angular, Vite preview
-        5000, 5173, 5174, // Vite, Flask
-        8000, 8080, 8081, // Django, generic
-    ];
-
     let mut open_ports = Vec::new();
 
-    for port in ports_to_check {
+    for port in ALLOWED_PROXY_PORTS {
         if std::net::TcpStream::connect(format!("127.0.0.1:{port}")).is_ok() {
-            open_ports.push(port);
+            open_ports.push(*port);
         }
     }
 
@@ -36,6 +36,12 @@ pub async fn proxy_to_port_path(
     use axum::body::Body;
     use axum::http::{StatusCode, header};
 
+    if !is_proxy_port_allowed(port) {
+        return Err(AppError::Authorization(format!(
+            "Port {port} is not allowed for proxying"
+        )));
+    }
+
     let target_url = format!("http://127.0.0.1:{port}/{path}");
 
     let client = reqwest::Client::builder()
@@ -79,3 +85,27 @@ pub async fn proxy_to_port_path(
         .body(Body::from(body))
         .map_err(|e| AppError::Internal(format!("Failed to build response: {e}")))
 }
+
+fn is_proxy_port_allowed(port: u16) -> bool {
+    ALLOWED_PROXY_PORTS.contains(&port)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[tokio::test]
+    async fn proxy_rejects_non_dev_ports() {
+        let result = proxy_to_port_path(Path((22, String::new()))).await;
+
+        assert!(matches!(result, Err(AppError::Authorization(_))));
+    }
+
+    #[test]
+    fn proxy_allows_only_known_dev_ports() {
+        assert!(is_proxy_port_allowed(5173));
+        assert!(is_proxy_port_allowed(8080));
+        assert!(!is_proxy_port_allowed(22));
+        assert!(!is_proxy_port_allowed(9200));
+    }
+}