[8chan] fix file urls

gallery_dl/extractor/8chan.py

@@ -13,11 +13,17 @@ from . import chan
 class InfinitychanThreadExtractor(chan.ChanThreadExtractor):
     """Extractor for images from threads from 8ch.net"""
     category = "8chan"
+    filename_fmt = "{time}-{filename}{ext}"
     pattern = [r"(?:https?://)?(?:www\.)?8ch\.net/([^/]+)/res/(\d+)"]
     test = [("https://8ch.net/tg/res/175887.html", {
-        "url": "cb03fdc650ad8e796fdab553fbd5489f468d3f45",
+        "url": "646d4230b40f9cff3f8674e3efe44bba3af4924b",
         "keyword": "d313fa77f689ddcd45736f1e86bf63cf58614786",
         "content": "81e21a3cc87f64f224a966f207e8e1731216c345",
     })]
     api_url = "https://8ch.net/{board}/res/{thread}.json"
-    file_url = "https://8ch.net/{board}/src/{tim}{ext}"
+    file_url = "https://media.8ch.net/{board}/src/{tim}{ext}"
+    file_url_v2 = "https://media.8ch.net/file_store/{tim}{ext}"
+
+    def build_url(self, post):
+        fmt = self.file_url if len(post["tim"]) < 64 else self.file_url_v2
+        return fmt.format_map(post)

gallery_dl/extractor/chan.py

@@ -37,17 +37,21 @@ class ChanThreadExtractor(Extractor):
             if "filename" not in post:
                 continue
             self.update(post)
-            yield Message.Url, self.file_url.format_map(post), post
+            yield Message.Url, self.build_url(post), post
             if "extra_files" in post:
                 for file in post["extra_files"]:
                     self.update(post, file)
-                    yield Message.Url, self.file_url.format_map(post), post
+                    yield Message.Url, self.build_url(post), post
 
     def update(self, post, data=None):
         """Update keyword dictionary"""
         post.update(data or self.metadata)
         post["extension"] = post["ext"][1:]
 
+    def build_url(self, post):
+        """Construct an image url out of a post object"""
+        return self.file_url.format_map(post)
+
     @staticmethod
     def get_thread_title(post):
         """Return thread title from first post"""