Agent Middleware Development: Python Plugin Writing

What's the point of proxy middleware development anyway?

Crawler friends should have encountered such a situation: the target site suddenly blocked your IP, the hard-written script directly paralyzed. At this time, if you can automatically change the IP, it is like installing a spare tire for the program, and immediately change a new one to continue to run. This is the core value of the proxy middleware - theLet the program learn to change its own vestThe

Four Steps to Python Plugin Development

Let's speak human in the most real way, and teach you how to build a reptile that can change its face by hand:

1. build a platform: installing the requests library and the ipipgo SDK first is like heating up a wok in preparation for a stir-fry.
2. plumbing: initialize ipipgo's proxy pool, remember to turn on their smart switching mode (more on this later)
3. switchgear: add middleware to requests, focusing on 403 and 429 error codes.
4. water temperature: Write a loop test script to see if the IP is really changing

A Guide to Avoiding the Pit (Blood and Tears)

Newbies are most likely to fall into these three potholes:

1. Proxy failure without retry: It is recommended to use the exponential backoff strategy, wait 1 second for the first failure, 3 seconds for the second, and change IP directly for the third.
2. IP switching too oftenSome websites will detect the speed of IP change, it is recommended to cooperate with ipipgo's intelligent scheduling function.
3. Forgot to clean up the connection: The session object for requests should be closed in a timely manner, otherwise it will take up a lot of proxy resources.

Why do you recommend ipipgo?

There are so many proxy providers on the market, but ipipgo is the best to use. TheirDynamic Residential IP PoolThere are three brushes:

• Nationwide coverage of 200 + cities, wherever you want to install the user can be!
• Automatically clean up invalid IPs, no need to write your own detection scripts
• Supports session hold for scenarios that require logging in.

Frequently Asked Questions QA

Q: What should I do if my agent often times out?
A: First check the network environment, if there is no problem locally, you can contact ipipgo technical support to lower the response thresholds

Q: How can I tell if the IP is in effect?
A: Add a special field in the request header and go to the backend of ipipgo to see the usage history

Q: What should I look for in an enterprise application?
A: Be sure to open ipipgo's API whitelisting feature, and remember to apply for an exclusive channel when there is a large amount of concurrency

In the end, to be honest, they toss the proxy pool is really better than using a ready-made service. The stability of the ones maintained by professional teams like ipipgo is several orders of magnitude higher than the ones maintained by individuals. In particular, theirIntelligent Routing FunctionThe IP, which can automatically match the target website in the region, this own realization of the words of the hair to fall out.