Is your crawler still running around naked when the IP is blocked?
Brothers engaged in crawlers understand that the most afraid of waking up to find that the IP was the target site black. The hard-written script suddenly fails, and the data flow is cut off, which is even worse than disconnecting from the Internet. If you can receive an alert in advance, it's like installing the crawler with aartificial pacemaker, a life-saver in a pinch.
The Three Lifebloods of Real-Time Surveillance
The traditional approach is like measuring a fever with your temperature - by the time you realize the abnormality it will be too late. Here are three top tips:
1. Heartbeat Detection: visit the test page every 5 minutes with a proxy IP, and immediately report to the police when encountering 403 (don't use the real target site, be careful of being anti-killed)
2. Abnormal Traffic Identification: Sudden traffic dips are more dangerous than spikes, setting up30% Flow Fluctuation Thresholds
3. Dual authentication mechanism: Don't trust the results of a single test, use an alternate IP to verify twice before sending an alert
| test item | Recommended parameters |
|---|---|
| Detection frequency | 5-10 minutes per session |
| alarm threshold | 3 consecutive failures |
| Alternate Authentication IP | At least 2 different segments |
Secrets to preserving the freshness of the proxy pool
Many brothers' agent pools are like stagnant puddles, so here's how to revitalize them:
① dynamic rotationDon't hold on to a batch of IPs and shuffle them around like a deck of cards.
② geographic isolation
: Segregate IPs from different regions into different "baskets" to avoid chained blocking. (iii) automatic elimination: Setting for each IPCountdown to SurvivalForced offline for more than 12 hours The program we designed for our own clients is simple for thieves: 1. Open in the ipipgo backendIP Health Monitoring(This feature is free) 2. Configure WeChat/email alarm channel (recommend tying both) 3. Setting up IP invalidationAutomatic switching within 30 seconds There is an e-commerce price comparison customer, with this set of programs to block the IP loss from 30,000 per month down to almost zero. Their technical director's words: "It's more reliable than hiring an O&M to keep an eye on it." Q: Can free agents use this program? Q: What if there is a delay in the alarm? Q: Why do you recommend ipipgo? There are no silver bullets in the anti-climbing war, but knowing in time which bullet is coming will at least make you bleed less. It is recommended that you get your alarm system up first and then slowly optimize the rest. Remember:A good warrior is a good crawler who knows how to call the police., don't let your data collection die an untimely death.IPIPGO's Killer Program
Guidelines on demining of common problems
A: Don't! Free IP pools are like public restrooms, you can't tell how many people have used them. We measured the free IP survival time is not more than 15 minutes.
A: Check the callback interface configuration, it is recommended to directly use ipipgo'swebhook functionality8 times faster than traditional polling
A: His family has a one-trick pony--IP Fingerprint ObfuscationThe TCP fingerprint of each proxy IP is different, and the anti-blocking effect is improved by 60%.A final word of caution.
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