fix

#

getjump/getjump.py

@@ -93,13 +93,16 @@ def get(  # noqa: PLR0913
         self.__check_url(url)
         self.login(url, username=username, password=password)
 
-        url = url if url.endswith(".json") else re.sub(r"((episode|magazine|volume)/\d+)", r"\1.json", url)
+        url = url[:-5] if url.endswith(".json") else url
 
         res = self._session.get(url, headers=HEADERS)
-
         self.__check_content_type(res.headers["content-type"])
 
-        j = res.json()["readableProduct"]
+        json_value = BeautifulSoup(res.content, "html.parser").find("script", id="episode-json").attrs.get("data-value", None)
+        if json_value is None:
+            raise ValueError("json data is missing.")
+
+        j = json.loads(json_value)["readableProduct"]
 
         nxt = j["nextReadableProductUri"]
         nxt = self.__check_next(nxt)
@@ -191,8 +194,8 @@ def __check_url(self, url: str) -> None:
 
     @staticmethod
     def __check_content_type(type_: str) -> None:
-        if "application/json" not in type_:
-            msg = f"got '{type_}', expect 'application/json'. Is given URL correct?"
+        if "text/html" not in type_:
+            msg = f"got '{type_}', expect 'text/html'. Is given URL correct?"
             raise TypeError(msg)
 
     @staticmethod