Booking Web Crawler Development: Countering Anti-Crawling Strategies

Real-world tutorial: using proxy IP to let the crawler in the booking site across the road

The brothers who do crawler know, now the anti-climbing system of the booking website is more strict than the Spring Festival ticket gate. Last week, an old iron complained that he wrote a concert ticket monitoring script, just run for two days was blocked 20 IP. this is not, today we will talk about how to use proxy IP this craft, so that the crawler in the anti-climbing system under the eyes of the sneak.

Where are the seven inches of the anti-climbing system?

These sites are protected against crawlers by three main axes:IP Access Count Monitoring,Request Feature Recognition,CAPTCHA bombingThe most important thing is that you can monitor the IP address of your home broadband. Especially IP monitoring is the most damaging, ordinary home broadband is a public IP, a little higher frequency of access immediately triggered the alarm.

As an example, the blocking logic of a ticket site looks like this:

The right way to open a proxy IP

Don't think that just any free agent will work, that stuff is more unreliable than a paper window. You have to use it for serious projects.Residential Dynamic AgentsThe API docking is very convenient, especially for the ones like ipipgo with automatic authentication. Their IP pool is updated daily with more than 20%, which is more diligent than changing socks.

There are three details to keep in mind when configuring an agent:

1. Randomly switch IPs for each request, don't glean a grip.
2. Mixing IPs from different regions (ipipgo can specify city nodes)
3. Combined with a randomized delay of 2-8 seconds to mimic the actions of a real person

Teaching Anti-Reverse Crawl Combination

It's not enough to have an agent, you have to pair it with these tawdry maneuvers:

1. Requests for headers should be trickyDon't use the default UA of the requests library. ipipgo's SDK has a ready-made UA pool that can be called directly, and it will be automatically changed for each request.

2. Mouse track epilepsy: When using headless browsers like Pyppeteer, remember to add some Parkinson's effects to your mouse movements, and don't be too regular with your trajectory coordinates.

3. Distributed coding for CAPTCHADon't be a hard-ass when it comes to graphical validation. Distribute the screenshot to multiple proxy nodes for simultaneous recognition. ipipgo's API supports an automatic retry mechanism.

Common Pit QA

Q: What should I do if the proxy IP often fails to connect?
A: eighty percent of the use of spam proxies, choose ipipgo such as with quality monitoring, automatic filtering of failed nodes.

Q: Do I need to maintain my own IP pool?
A: Unless the team has dedicated O&M staff, it's more cost-effective to just buy an off-the-shelf service. ipipgo's packages range from 5 concurrency to 500 concurrency, with on-demand scaling.

Q: How to break the advanced anti-climbing encounter?
A: On the ultimate killers -Browser Fingerprint Emulation.. With ipipgo's mobile IP + custom TLS fingerprinting, the success rate pulls straight to full.

Finally said a heartfelt, do crawler this line is Taoist high foot devil high foot. The key to choose a reliable agent partner, like ipipgo I used a small two years, the biggest feeling is that their technical response fast. Last time an airline update anti-climbing system, they two days to respond to the program, the service has nothing to say.