Prefer curl impersonation for protected media

provider_downloader.py

@@ -215,32 +215,72 @@ def request_headers(headers=None, referer=None):
 
 
 def curl_candidates():
+    def candidate_score(name):
+        text = Path(str(name or "")).name
+        numbers = [int(value) for value in re.findall(r"\d+", text)]
+        version = numbers[0] if numbers else 0
+        family_score = 4 if text.startswith("curl_chrome") else 3 if text.startswith("curl_firefox") else 2 if text.startswith("curl_safari") else 1
+        return (family_score, version, text)
+
     configured = str(os.environ.get("KAIZOKU_CURL_BIN") or "").strip()
-    names = [
-        configured,
-        "curl_chrome120",
-        "curl_chrome116",
-        "curl_chrome110",
-        "curl-impersonate",
-        "curl",
-    ]
+    names = [configured]
+    wrapper_prefixes = ("curl_chrome", "curl_firefox", "curl_safari", "curl_edge")
+    path_dirs = [Path(part) for part in os.environ.get("PATH", "").split(os.pathsep) if part]
+    discovered = []
+    for directory in path_dirs:
+        try:
+            for path in directory.iterdir():
+                if path.name.startswith(wrapper_prefixes) and os.access(path, os.X_OK):
+                    discovered.append(path.name)
+        except OSError:
+            continue
+    discovered.sort(key=candidate_score, reverse=True)
+    names.extend(discovered)
+    names.extend(
+        [
+            "curl_chrome142",
+            "curl_chrome136",
+            "curl_chrome133a",
+            "curl_chrome133",
+            "curl_chrome131",
+            "curl_chrome124",
+            "curl_chrome123",
+            "curl_chrome120",
+            "curl_chrome116",
+            "curl_chrome110",
+            "curl_firefox135",
+            "curl_firefox133",
+            "curl-impersonate",
+            "curl",
+        ]
+    )
     candidates = []
     for name in names:
-        if not name or name in candidates:
+        if not name:
             continue
         resolved = shutil.which(name)
-        if resolved:
+        if resolved and resolved not in candidates:
             candidates.append(resolved)
     return candidates
 
 
+def curl_uses_browser_wrapper(curl_bin):
+    return Path(str(curl_bin or "")).name.startswith(("curl_chrome", "curl_firefox", "curl_safari", "curl_edge"))
+
+
+def curl_request_headers(curl_bin, headers=None):
+    if not curl_uses_browser_wrapper(curl_bin):
+        return request_headers(headers)
+    return {key: value for key, value in (headers or {}).items() if value}
+
+
 def curl_fetch_bytes(url, headers=None, timeout=30):
     candidates = curl_candidates()
     if not candidates:
         raise RuntimeError("curl is not available for media fetch fallback.")
-    clean_headers = request_headers(headers)
     last_error = None
     for curl_bin in candidates:
+        clean_headers = curl_request_headers(curl_bin, headers)
         cmd = [
             curl_bin,
             "--location",