Add device HWID support to sing-box subscriptions

src-tauri/tests/subscription_tests.rs

@@ -5,7 +5,10 @@ mod subscription;
 
 use base64::{engine::general_purpose, Engine};
 use models::redact_subscription_url;
-use subscription::{parse_subscription_body, parse_user_info};
+use std::io::{Read, Write};
+use std::net::TcpListener;
+use std::time::Duration;
+use subscription::{parse_subscription_body, parse_user_info, SubscriptionFetchIdentity};
 
 #[test]
 fn parses_singbox_json_config_servers() {
@@ -78,6 +81,55 @@ fn rejects_invalid_or_non_http_subscription_url_before_network() {
     assert!(unsupported.message.contains("http or https"));
 }
 
+#[test]
+fn fetch_subscription_sends_device_hwid_header_when_identity_is_set() {
+    let listener = TcpListener::bind("127.0.0.1:0").expect("bind local test listener");
+    let url = format!("http://{}/subscription", listener.local_addr().unwrap());
+    let request_thread = std::thread::spawn(move || {
+        let (mut stream, _) = listener.accept().expect("accept test request");
+        stream
+            .set_read_timeout(Some(Duration::from_secs(2)))
+            .expect("set read timeout");
+
+        let mut request = Vec::new();
+        let mut buffer = [0_u8; 512];
+        loop {
+            let bytes_read = stream.read(&mut buffer).expect("read request");
+            if bytes_read == 0 {
+                break;
+            }
+            request.extend_from_slice(&buffer[..bytes_read]);
+            if request.windows(4).any(|window| window == b"\r\n\r\n") {
+                break;
+            }
+        }
+
+        let body = r#"{"outbounds":[{"type":"vless","tag":"nl-1","server":"nl.example.test","server_port":443}]}"#;
+        let response = format!(
+            "HTTP/1.1 200 OK\r\ncontent-type: application/json\r\ncontent-length: {}\r\n\r\n{}",
+            body.len(),
+            body
+        );
+        stream
+            .write_all(response.as_bytes())
+            .expect("write response");
+
+        String::from_utf8_lossy(&request).to_ascii_lowercase()
+    });
+
+    let identity = SubscriptionFetchIdentity::with_device_hwid(Some("hwid-abc123"));
+    let cache = subscription::fetch_subscription_with_identity(&url, &identity)
+        .expect("fetch subscription through local test server");
+    let request = request_thread.join().expect("request thread");
+
+    assert_eq!(cache.servers[0].tag, "nl-1");
+    assert!(request.contains("x-hwid: hwid-abc123"));
+    assert!(request.contains("user-agent: proxywarden/"));
+    assert!(request.contains("x-app-name: proxywarden"));
+    assert!(request.contains("x-device-os:"));
+    assert!(request.contains("x-device-model: proxywarden"));
+}
+
 #[test]
 fn redacts_subscription_url_for_display() {
     assert_eq!(