Python Request Authentication | Handling Cookies and Session Tips

How does a Python crawler bypass login verification with a proxy IP?

The biggest headache of engaging in data collection is login verification, like some platforms use CAPTCHA to defend people as robots. At this time it is necessary to use the proxy IP to disguise the real identity, let's say using ipipgo's dynamic residential agent, each request for a different region of the IP address, so that the target site thinks that it is more than one real user login.

Recommendations in practiceRandomize proxy IPs for each requestThe first thing you need to do is not to catch the same IP and glean it hard. Here is a small trick: the API provided by ipipgo to access the program, automatically get the latest available IP. the code looks like this:

import requests
from random import choice

def get_proxy().
    proxies = requests.get("API address of ipipgo").json()
    return {'http': f'http://{choice(proxies)}'}

response = requests.post(login_url, proxies=get_proxy())

How does Cookie Management work with proxy IPs?

Some websites will check the correspondence between login status and IP. Assuming that you got a cookie the first time you logged in with a Beijing IP, and then suddenly switched to a Shanghai IP to send a request, the server may directly kick you offline. The solution isSeparate cookie pool for each proxy IPThe

It is recommended to use the Session object of the requests library with ipipgo's fixed duration package (e.g. 1 hour to keep the same exit IP). Code example:

session = requests.Session()
session.proxies = {"http": "Currently used ipipgo proxy address"}

 First login keeps the session
session.post(login_url, data=credentials)
 Subsequent requests automatically with cookies
data = session.get(protected_page).json()

What should I do if I encounter dynamic Token authentication?

Nowadays, many websites will bury dynamic tokens in the form, which requires theFirst use the proxy IP to get the page, then extract the token to initiate the requestThe key point is to keep the same exit IP for both requests, otherwise the token will be invalidated. The key point is to keep the same exit IP for both requests, otherwise the token will be invalidated.

The secret to not blocking high-frequency visits

Do automated operations are most afraid of being blocked, here recommended ipipgo'sRotation package + request delay combo::

1. Set IP change every 5-10 requests
2. Randomized delay control between 2 and 8 seconds
3. Important operations use long-lasting static IP (supported by ipipgo Enterprise)

Practical QA triple question

Q：How can I emergency my proxy IP when it suddenly fails?
A: Immediately switch to ipipgo's alternate channel, they provide 3 alternate API entrances, remember to add the exception retry mechanism in the code.

Q: What if I need to process a CAPTCHA?
A: Use fixed geographic IP (such as ipipgo's Shanghai server room IP) with the coding platform to maintain the consistency of IP and login place.

Q: How can I tell when it's time to change my IP?
A: Monitor the response status code and call ipipgo's force refresh interface for a new IP when a 403/429 error occurs.

Finally, we remind you that you have to choose the agency service to seeIP purityrespond in singingProtocol Support. Like ipipgo not only supports HTTP/HTTPS/SOCKS5, but also provides Header customization, which is especially useful for scenarios where you need to simulate browser characteristics. Their IP survival rate I measured can reach more than 92%, more stable than some of the small workshop that does not move offline.