feat: implement charset detection utility in fork.py

--bug=1059829 --user=刘瑞斌 【知识库】web导入知识库中文字符乱码 https://www.tapd.cn/62980211/s/1746162

Author: liuruibin

apps/common/utils/fork.py

@@ -1,5 +1,4 @@
 import copy
-import logging
 import re
 import traceback
 from functools import reduce
@@ -139,18 +138,30 @@ def get_beautiful_soup(response):
         html_content = response.content.decode(encoding)
         beautiful_soup = BeautifulSoup(html_content, "html.parser")
         meta_list = beautiful_soup.find_all('meta')
-        charset_list = [meta.attrs.get('charset') for meta in meta_list if
-                        meta.attrs is not None and 'charset' in meta.attrs]
+        charset_list = Fork.get_charset_list(meta_list)
         if len(charset_list) > 0:
             charset = charset_list[0]
             if charset != encoding:
                 try:
-                    html_content = response.content.decode(charset)
+                    html_content = response.content.decode(charset, errors='replace')
                 except Exception as e:
-                    maxkb_logger.error(f'{e}')
+                    maxkb_logger.error(f'{e}: {traceback.format_exc()}')
                 return BeautifulSoup(html_content, "html.parser")
         return beautiful_soup
 
+    @staticmethod
+    def get_charset_list(meta_list):
+        charset_list = []
+        for meta in meta_list:
+            if meta.attrs is not None:
+                if 'charset' in meta.attrs:
+                    charset_list.append(meta.attrs.get('charset'))
+                elif meta.attrs.get('http-equiv', '').lower() == 'content-type' and 'content' in meta.attrs:
+                    match = re.search(r'charset=([^\s;]+)', meta.attrs['content'], re.I)
+                    if match:
+                        charset_list.append(match.group(1))
+        return charset_list
+
     def fork(self):
         try: