perl的话，可以爬虫，模拟保存文件。你是要保存文件？WWW::Mechanize 做除开js以为的一切智能操作。

py应该有类似的吧。可能。

WWW::Mechanize, or Mech for short, is a Perl module for stateful programmatic web browsing, used for automating interaction with websites.

Features include:
All HTTP methods
High-level hyperlink and HTML form support, without having to parse HTML yourself
SSL support
Automatic cookies
Custom HTTP headers
Automatic handling of redirections
Proxies
HTTP authentication

Mech supports performing a sequence of page fetches including following links and submitting forms. Each fetched page is parsed and its links and forms are extracted. A link or a form can be selected, form fields can be filled and the next page can be fetched. Mech also stores a history of the URLs you've visited, which can be queried and revisited.