fix: support current official Miruro mirrors

tests/unit/miruro.rs

@@ -83,3 +83,105 @@ fn episodes_resolve_by_promise_id_with_independent_tables_or_fail_explicitly() {
         io::ErrorKind::NotFound
     );
 }
+
+#[test]
+fn mirror_failover_remembers_success_and_stops_on_rate_limits_and_bad_requests() {
+    use std::{
+        io::{BufRead, BufReader, Write},
+        net::TcpListener,
+        thread,
+    };
+
+    let listener = TcpListener::bind("127.0.0.1:0").unwrap();
+    let base = format!("http://{}", listener.local_addr().unwrap());
+    let server = thread::spawn(move || {
+        for (path, status, mime, body) in [
+            ("/one/catalog?q=anime", 403, "text/html", "blocked"),
+            ("/two/catalog?q=anime", 200, "text/html", "protection page"),
+            (
+                "/three/catalog?q=anime",
+                200,
+                "application/json",
+                r#"{"data":[{"id":"series"}]}"#,
+            ),
+            ("/three/detail", 503, "text/html", "unavailable"),
+            (
+                "/one/detail",
+                200,
+                "text/sveltekit-data",
+                "episode metadata",
+            ),
+            ("/one/limited", 429, "text/html", "rate limited"),
+            ("/one/bad-query", 400, "application/json", "{}"),
+            ("/one/exhausted", 403, "text/html", "blocked"),
+            ("/two/exhausted", 404, "text/html", "gone"),
+            ("/three/exhausted", 502, "text/html", "unavailable"),
+            ("/one/recovered", 200, "application/json", r#"{"data":[]}"#),
+        ] {
+            let (mut stream, _) = listener.accept().unwrap();
+            stream
+                .set_read_timeout(Some(Duration::from_secs(5)))
+                .unwrap();
+            let mut reader = BufReader::new(&stream);
+            let mut line = String::new();
+            reader.read_line(&mut line).unwrap();
+            assert_eq!(line.trim_end(), format!("GET {path} HTTP/1.1"));
+            loop {
+                line.clear();
+                reader.read_line(&mut line).unwrap();
+                if line == "\r\n" {
+                    break;
+                }
+            }
+            write!(
+                stream,
+                "HTTP/1.1 {status} Response\r\nContent-Type: {mime}\r\nContent-Length: {}\r\nConnection: close\r\n\r\n{body}",
+                body.len()
+            ).unwrap();
+        }
+    });
+    let bases = [
+        format!("{base}/one"),
+        format!("{base}/two"),
+        format!("{base}/three"),
+    ];
+    let mirrors: Vec<_> = bases.iter().map(String::as_str).collect();
+    let client = Client::default();
+    let body = client
+        .get_from(
+            &mirrors,
+            "/catalog",
+            &[("q", "anime")],
+            &["application/json"],
+        )
+        .unwrap();
+    assert_eq!(
+        serde_json::from_str::<Value>(&body).unwrap()["data"][0]["id"],
+        "series"
+    );
+    assert_eq!(
+        client
+            .get_from(&mirrors, "/detail", &[], &["text/sveltekit-data"])
+            .unwrap(),
+        "episode metadata"
+    );
+    for (path, status) in [("/limited", 429), ("/bad-query", 400)] {
+        let error = client
+            .get_from(&mirrors, path, &[], &["application/json"])
+            .unwrap_err();
+        assert!(error.to_string().contains(&format!("HTTP {status}")));
+    }
+    let error = client
+        .get_from(&mirrors, "/exhausted", &[], &["application/json"])
+        .unwrap_err();
+    assert!(error.to_string().contains("failed on 3/3 mirrors"));
+    assert!(error.to_string().contains("HTTP 502"));
+    let body = client
+        .get_from(&mirrors, "/recovered", &[], &["application/json"])
+        .unwrap();
+    assert_eq!(
+        serde_json::from_str::<Value>(&body).unwrap()["data"],
+        serde_json::json!([])
+    );
+    server.join().unwrap();
+}