From 40f174db769ecbae64adc125533f42380b32d187 Mon Sep 17 00:00:00 2001
From: Dmitry Kokorin <dmitry@kokorin.org>
Date: Tue, 15 Sep 2026 12:17:59 +0300
Subject: [PATCH] =?UTF-8?q?downloads:=20item=2005=20EN=20(Abt=20Daimon=202?=
 =?UTF-8?q?005/2017)=20+=20item=2024=20(Franz=20EN=201974=20+=20RU=20?=
 =?UTF-8?q?=D0=9A=D0=B0=D1=81=D1=82=D0=B0=D0=BB=D0=B8=D1=8F=202018=20djvu)?=
 =?UTF-8?q?;=20items=2003=20big=20facsimiles=20+=2005=20RU=20+=2011=20RU?=
 =?UTF-8?q?=20in=20background=20queue?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 tools/lgdl.py | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/tools/lgdl.py b/tools/lgdl.py
index 38f3ffd..f2f5ed8 100644
--- a/tools/lgdl.py
+++ b/tools/lgdl.py
@@ -91,6 +91,8 @@ def sniff(data: bytes) -> str:
         return "epub/zip"
     if data[:8] == b"\xd0\xcf\x11\xe0\xa1\xb1\x1a\xe1":
         return "doc/ole"
+    if data[:8] in (b"AT&TFORM", b"AT&ToC\01", b"AT&ToC\02"):
+        return "djvu"
     if b"<html" in data[:2000].lower():
         return "HTML-ERROR"
     return "unknown"
@@ -123,8 +125,13 @@ def download(f_id, out_dir, name, tries=8):
             continue
         url = m.group(1)
         tmp = out + ".part"
-        rc = curl(url, out=tmp, referer=f"{BASE}/ads.php?md5={md5}", binary=True,
-                  timeout=900, extra=["-C", "-"])
+        try:
+            rc = curl(url, out=tmp, referer=f"{BASE}/ads.php?md5={md5}", binary=True,
+                      timeout=900, extra=["-C", "-"])
+        except RuntimeError as e:
+            print(f"  try {t}: fetch error ({e}) — back off")
+            time.sleep(45)
+            continue
         data = open(tmp, "rb").read()
         kind = sniff(data)
         ok_size = (size == 0) or (len(data) == size)