Added functionality to use persistent session

[lucasmrdt]

Hi guys, I'm submitting this small change to allow using cookies and credentials simultaneously.

To my knowledge:

If you want to scrap with a logged account, you can either give your credentials or your cookies.

2 issues quickly arise if you use a logged account for a long period of time (e.g. scrapping things on a private FB group every day) :

• If you use the credentials property, Facebook will quickly flag you as a suspect as you log in too often, making you suspicious.
• If you use the cookies  property, you must manually refresh the content of the cookies to avoid the expiration of your session.

The use_persistent_session  method allows you to log in before querying private information by only providing your credentials. Under the hood, the cookies are automatically stored, used, and refreshed to avoid as far as possible using your credentials and being flagged as suspicious by Facebook.

Usage:

>>> facebook_scraper.use_persistent_session(FB_USERNAME, FB_PASSWORD)

>>> for post in get_posts('private_group', pages=1):
...           print(post['text'])
...
Lorem ipsum dolor sit amet consectetur adipisicing elit.
Maxime mollitia molestiae quas vel sint commodi (...)

I remain open to all discussions 😄.

[jasonren0403]

I tried the new commit and the resulted .pckl file always load with error. The file was acting like this from binary file viewer:

00000000: 8004 4e2e

I have reviewed the source code and found that login function in facebook_scraper.py indeed does not return anything...

[lucasmrdt]

I tried the new commit and the resulted .pckl file always load with error. The file was acting like this from binary file viewer:

00000000: 8004 4e2e

I have reviewed the source code and found that login function in facebook_scraper.py indeed does not return anything...

Indeed, you are right, I forget to update the files correctly. Just open a new PR to provide a fix for this. Thank you for pointing me this error.

[liuying12138]

Hello, I encountered some problems when using this method:

import facebook_scraper
facebook_scraper.use_persistent_session(FB_USERNAME, FB_PASSWORD)
for post in facebook_scraper.get_posts("VientianeMai", page_limit=None,
                      options={"allow_extra_requests": False, "posts_per_page": 200}):
    print(post)

Traceback (most recent call last): File "/root/project/Facebook/test.py", line 4, in <module> facebook_scraper.use_persistent_session("xxxxxxx", "xxxxxxx") File "/root/lib/python3.8/site-packages/facebook_scraper/__init__.py", line 552, in use_persistent_session set_cookies(cookies) File "/root/lib/python3.8/site-packages/facebook_scraper/__init__.py", line 53, in set_cookies raise exceptions.InvalidCookies(f"Cookies are not valid") facebook_scraper.exceptions.InvalidCookies: Cookies are not valid