[xenforo] fix incomplete video URLs (#8786)

gallery_dl/extractor/xenforo.py

@@ -41,6 +41,7 @@ class XenforoExtractor(BaseExtractor):
             r')'
         ).findall
 
+        root_media = self.config_instance("root-media") or self.root
         for post in self.posts():
             urls = extract_urls(post["content"])
             if post["attachments"]:
@@ -74,6 +75,8 @@ class XenforoExtractor(BaseExtractor):
                     text.nameext_from_url(url, data)
                     data["id"] = text.parse_int(
                         data["filename"].partition("-")[0])
+                    if url[0] == "/":
+                        url = root_media + url
                     yield Message.Url, url, data
 
                 elif (inline := inl1 or inl2):
@@ -274,6 +277,7 @@ BASE_PATTERN = XenforoExtractor.update({
     },
     "atfforum": {
         "root": "https://allthefallen.moe/forum",
+        "root-media": "https://allthefallen.moe",
         "pattern": r"(?:www\.)?allthefallen\.moe/forum",
         "cookies": ("xf_user",),
     },

test/results/atfforum.py

@@ -58,6 +58,15 @@ __tests__ = (
     "#class"   : xenforo.XenforoPostExtractor,
 },
 
+{
+    "#url"     : "https://www.allthefallen.moe/forum/index.php?threads/shoujo-ramune-episode-1-decensored-by-deepcreampy.17050/#post-19803487",
+    "#comment" : "incomplete video URL (#8786)",
+    "#category": ("xenforo", "atfforum", "post"),
+    "#class"   : xenforo.XenforoPostExtractor,
+    "#auth"    : True,
+    "#results" : "https://allthefallen.moe/forum/data/video/1094/1094367-e46ad8636dee0d4488db56d3770919cc.mp4",
+},
+
 {
     "#url"     : "https://www.allthefallen.moe/forum/index.php?threads/final-fantasy-xiv.57090/",
     "#category": ("xenforo", "atfforum", "thread"),