[2chan] skip external links

gallery_dl/extractor/2chan.py

@@ -21,9 +21,9 @@ class _2chanThreadExtractor(Extractor):
     archive_fmt = "{board}_{thread}_{tim}"
     url_fmt = "https://{server}.2chan.net/{board}/src/{filename}"
     pattern = r"(?:https?://)?([^.]+)\.2chan\.net/([^/]+)/res/(\d+)"
-    test = ("http://dec.2chan.net/70/res/11048.htm", {
-        "url": "2ecf919139bd5d915930530b3576d67c388a2a49",
-        "keyword": "8def4ec98a89fd4fff8bbcbae603604dcb4a3bb9",
+    test = ("http://dec.2chan.net/70/res/4752.htm", {
+        "url": "1c2d2ce8aea0fc71d94735cfc30009d628f33548",
+        "keyword": "f508d6841ea2cb19ed799aac9dc580263ca50651",
     })
 
     def __init__(self, match):
@@ -70,7 +70,8 @@ class _2chanThreadExtractor(Extractor):
         data = self._extract_post(post)
         if data["name"]:
             data["name"] = data["name"].strip()
-        if '<a href="/' in post:
+        path = text.extract(post, '<a href="/', '"')[0]
+        if path and not path.startswith("bin/jump"):
             self._extract_image(post, data)
             data["tim"], _, data["extension"] = data["filename"].partition(".")
             data["time"] = data["tim"][:-3]