问题：

• 今天（20231017）的代码版本有误 疑似main.py的第46行 重复粘贴
• 有些文章图片为png?，无法下载，可以加个if判断

建议：

• 可不可以考虑在文件前面加时间，有些专栏有几百篇，只按标题顺序很乱
• 源代码中对文件名称（不能以数字开头）和长度进行了限制，我这边测试下来没有什么问题，不知道作者是出于什么考虑限制的
• 考不考虑增加休眠时间，避免被反扒干掉。并记录当前传输到哪，即断点续传
• 考不考虑对跳转链接进行优化，现在的跳转连接都是“https://link.zhihu.com/?target=”，完全可以去掉

https://www.zhihu.com/column/c_1104714416238673920

看了一下是不是拼接 URL的时候默认都是文章
https://github.com/chenluda/zhihu-download/blob/main/main.py#L354

首先感谢作者！我查看了代码，发现似乎并没有针对上述情况进行特殊处理。（水平有限，还达不到merge级别）供chenluda🧑‍🎓参考。

在使用过程中发现当公式中使用了\tag{}标签时，公式使用单$包围无法被正常识别渲染，需要使用双$$
例如这篇知乎文章https://zhuanlan.zhihu.com/p/411502030

大佬，导出的内容里面没有包含链接内容，这块能否优化？

好像没法用了，显示The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.

• Running on http://127.0.0.1:5000
  Press CTRL+C to quit
  127.0.0.1 - - [06/Mar/2024 11:00:27] "GET / HTTP/1.1" 200 -
  127.0.0.1 - - [06/Mar/2024 11:00:27] "GET / HTTP/1.1" 200 -
  127.0.0.1 - - [06/Mar/2024 11:00:27] "GET /favicon.ico HTTP/1.1" 404 -
  [2024-03-06 11:00:41,260] ERROR in app: Exception on / [POST]
  Traceback (most recent call last):
  File "D:\Software\Anaconda\envs\auto\lib\site-packages\flask\app.py", line 2190, in wsgi_app
  response = self.full_dispatch_request()
  File "D:\Software\Anaconda\envs\auto\lib\site-packages\flask\app.py", line 1486, in full_dispatch_request
  rv = self.handle_user_exception(e)
  File "D:\Software\Anaconda\envs\auto\lib\site-packages\flask\app.py", line 1484, in full_dispatch_request
  rv = self.dispatch_request()
  File "D:\Software\Anaconda\envs\auto\lib\site-packages\flask\app.py", line 1469, in dispatch_request
  return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
  File "C:\Users\Winter\Desktop\Auto\blog2md\zhihu2md\new\zhihu-download-main\app.py", line 21, in index
  markdown_title = judge_zhihu_type(url)
  File "C:\Users\Winter\Desktop\Auto\blog2md\zhihu2md\new\zhihu-download-main\main.py", line 81, in judge_zhihu_type
  title = parse_zhihu_article(url, hexo_uploader)
  File "C:\Users\Winter\Desktop\Auto\blog2md\zhihu2md\new\zhihu-download-main\main.py", line 260, in parse_zhihu_article
  author = soup.select_one('div.AuthorInfo').find(
  AttributeError: 'NoneType' object has no attribute 'find'
  127.0.0.1 - - [06/Mar/2024 11:00:41] "POST / HTTP/1.1" 500 -

Internal Server Error
The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.

状态码 500

好像不能用的，我下载链接地址为：https://zhuanlan.zhihu.com/p/636270877

在保存https://www.zhihu.com/question/362131975/answer/2182682685 时出现以下报错：
Traceback (most recent call last):
File "D:\anaconda3\Lib\site-packages\flask\app.py", line 2529, in wsgi_app
response = self.full_dispatch_request()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\anaconda3\Lib\site-packages\flask\app.py", line 1825, in full_dispatch_request
rv = self.handle_user_exception(e)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "D:\anaconda3\Lib\site-packages\flask\app.py", line 1823, in full_dispatch_request
rv = self.dispatch_request()
^^^^^^^^^^^^^^^^^^^^^^^
File "D:\anaconda3\Lib\site-packages\flask\app.py", line 1799, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\wyt\Downloads\zhihu-download-main\app.py", line 21, in index
markdown_title = judge_zhihu_type(url)
^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\wyt\Downloads\zhihu-download-main\main.py", line 77, in judge_zhihu_type
title = parse_zhihu_answer(url, hexo_uploader)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\wyt\Downloads\zhihu-download-main\main.py", line 286, in parse_zhihu_answer
markdown_title = save_and_transform(
^^^^^^^^^^^^^^^^^^^
File "C:\Users\wyt\Downloads\zhihu-download-main\main.py", line 157, in save_and_transform
original_url = link['href']
~~~~^^^^^^^^
File "D:\anaconda3\Lib\site-packages\bs4\element.py", line 1573, in getitem
return self.attrs[key]
~~~~~~~~~~^^^^^
KeyError: 'href'
127.0.0.1 - - [11/Mar/2024 16:18:49] "POST / HTTP/1.1" 500 -

转换之后，数学公式并不会被美元号 $ 括住，导致看到的数学公式是 latex 源码。

数学公式似乎是由这类元素表示的：

<span class="ztext-math" ...>...</span>

发现当专栏的文章总数多于10篇时，只能成功下载前10篇，发现问题出在“parse_zhihu_column()”函数里从第二循环开始，offset=10或更大的数字时，得到的response是空值，不知道是不是被知乎反爬了。

When I ran app.py, there went errors:

NameError: name 'Flask' is not defined
NameError: name 'request' is not defined
NameError: name 'render_template' is not defined
NameError: name 'send_file' is not defined

This bug can be fixed by adding this line in app.py(line 5)

from flask import Flask, request, render_template, send_file

本地部署后下载返回None.zip，debug的时候发现是有数据的，但是最后就是返回None.zip

大佬我最近遇到了一个新的问题，就是说如果知乎的图片是动图的。Webp形式。那么，如果采用这种方法下载的话，下载的图片格式为JPG格式，也就为静图的。这个应该怎么调整？下面是具体的网址例子。希望大佬可以解决一下。
https://zhuanlan.zhihu.com/p/60778370