Move redirecting-proxy formats to video.url for verified app clients; document the rule

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MUYdCh2nCVsQYgJAT7gwSi

src/proxy.rs

@@ -20,6 +20,40 @@ use crate::proxies::thaiporntv::ThaipornTvProxy;
 use crate::proxies::*;
 use crate::util::requester::Requester;
 
+/// Proxies that answer with a `302` to the real media instead of streaming it.
+/// The Hot Tub app cannot follow a redirect inside `formats[].url`, so for app
+/// clients a format pointing at one of these is moved to `video.url` (see
+/// `move_redirect_formats_to_url`). Keep in sync with the `proxy2redirect`
+/// routes below; `redirect_proxy_list_matches_routes` enforces it.
+pub const REDIRECT_PROXIES: &[&str] = &[
+    "archivebate",
+    "clapdat",
+    "doodstream",
+    "lulustream",
+    "sxyprn",
+    "javtiful",
+    "spankbang",
+    "porndish",
+    "hqporner",
+    "heavyfetish",
+    "vjav",
+    "pornhd3x",
+    "vidara",
+    "pimpbunny",
+    "thaiporntv",
+    "tube8",
+    "supjav",
+];
+
+/// True for a `/proxy/<redirect proxy>/...` URL (absolute or host-relative).
+pub fn is_redirect_proxy_url(url: &str) -> bool {
+    let Some(rest) = url.split_once("/proxy/").map(|(_, rest)| rest) else {
+        return false;
+    };
+    let name = rest.split('/').next().unwrap_or_default();
+    REDIRECT_PROXIES.contains(&name)
+}
+
 pub fn config(cfg: &mut web::ServiceConfig) {
     cfg.service(
         web::resource("/archivebate/{endpoint}*")
@@ -239,3 +273,39 @@ fn get_proxy(proxy: &str) -> Option<AnyProxy> {
         _ => None,
     }
 }
+
+#[cfg(test)]
+mod redirect_proxy_tests {
+    use super::*;
+
+    #[test]
+    fn recognises_redirect_proxy_urls() {
+        assert!(is_redirect_proxy_url("http://h/proxy/archivebate/archivebate.com/watch/1"));
+        assert!(is_redirect_proxy_url("/proxy/hqporner/x"));
+        assert!(!is_redirect_proxy_url("http://h/proxy/noodlemagazine/x"));
+        assert!(!is_redirect_proxy_url("https://cdn.example/video.mp4"));
+    }
+
+    #[test]
+    fn redirect_proxy_list_matches_routes() {
+        let source = include_str!("proxy.rs");
+        let config_body = source
+            .split("pub fn config(")
+            .nth(1)
+            .and_then(|rest| rest.split("async fn proxy2redirect(").next())
+            .expect("config body");
+        let mut from_routes: Vec<String> = Vec::new();
+        for block in config_body.split("web::resource(\"/").skip(1) {
+            let name = block.split("/{endpoint}").next().unwrap_or_default();
+            let until_next = block.split("web::resource(").next().unwrap_or(block);
+            if until_next.contains("proxy2redirect") {
+                from_routes.push(name.to_string());
+            }
+        }
+        let mut listed: Vec<String> = REDIRECT_PROXIES.iter().map(|s| s.to_string()).collect();
+        from_routes.sort();
+        from_routes.dedup();
+        listed.sort();
+        assert_eq!(listed, from_routes);
+    }
+}