First, ten million proxy IP data stored for what purpose? Why do we have to optimize? We do crawl brothers understand that there are no millions of proxy IP in hand are embarrassed to go out. But really saved to the ten million level, the problem comes - ordinary database directly collapse to you. Two days ago, an old iron told me that they use M...

When the CAPTCHA farm meets the proxy IP: the law of survival can not be bypassed Brothers engaged in the CAPTCHA recognition of this line of work understand that the machine is open, the CAPTCHA flood like a flood of influx. This time the most afraid of what, IP is marked! In the morning just debugging a good interface, the afternoon was the target site black, this pain is like eating noodles without seasoning packets. ...

First, why recursive crawlers have to use proxy IP? Engaged in data crawling know, paging links and deep pages like Russian nesting dolls, a layer of a layer simply can not stop. At this time, if you use your own local IP hard just, minutes will be the target site black - especially the price data of e-commerce platforms, ...

How the hell does this thing spin up? The old iron who has engaged in the crawler understand that the IP is blocked like choking on a meal as difficult. Distributed IP rotation system is to put it bluntly to the program installed a magic weapon to automatically change the vest, like playing a game to open unlimited resurrection hang. Let's split the source code to see the core of the three major pieces: IP pool management ...

When the crawler hits the anti-climbing mechanism Doing data crawling friends should have experienced such a scenario: just run through the crawler script, the next day on the target site to receive a 403 error. The anti-climbing mechanism is like a spring, the more you force it, the stronger it is. At this time, distributed crawler + proxy IP combo punch, like to the crawler loaded with the Admiralty ...

When the crawler meets fire prevention: why does your proxy IP suddenly fail? Friends engaged in data crawling have experienced this situation: obviously changed a dozen proxy IP, the target site can still accurately identify your crawler. At this time, you may curse: "This broken website anti-reptile defense with the vault! &#82...

Browser fingerprints are harder to hide than ID cards? We all know to empty the shopping cart, but many people do not know that every time you open a web page in the background to leave an "electronic ID card". This thing called browser fingerprints, through your computer's fonts, time zones, screen resolution of these twenty...

When the proxy pool suddenly mined, what should you do? Engaged in data collection friends have experienced this kind of despair: 3:00 a.m. scripts run well, suddenly all the proxy IP collective strike, the next day the boss stared at the empty database to say. At this time, if you know the proxy meltdown mechanism, it is like giving the program on the insurance ...

When the crawler meets anti-climbing: how to break this cat and mouse game? Do data crawl friends have recently found that the site's anti-climbing measures more and more "chicken thief". Previously, with a fixed IP can still mix a few days, and now just climb half an hour to be blocked. This time we have to move out of our killer - proxy IP. but...