Crawler strategies to avoid being blacklisted by websites

When network data is crawled, IP is often at risk of being blacklisted. This can result in access being restricted or blocked, seriously affecting the efficiency and accuracy of the crawler's work. To prevent this from happening, here are some effective crawling strategies to prevent being blacklisted by websites:

1, the use of IP rotating proxy services: in the network data scraping, frequently using the same IP address to send requests may cause the website to blacklist the IP, restrict or block access to the IP. In order to avoid this happening, choosing a reliable IP rotation proxy service has become an indispensable choice for crawlers.

The IP rotation proxy service works by providing crawlers with a pool of IP that enables them to use a different IP address for each request. The advantage of this is that each request can be made from a different IP address, so that visits to the same website do not frequently use the same IP. This randomness and variety makes crawler work look more like browsing by real users, reducing the risk of being identified as a crawler by a website.

①What are the disadvantages of free HTTP proxies

The proxy server acts as an intermediary between the crawler and the Internet, sending and receiving requests through the proxy server, so that the real IP address is effectively protected. In this way, the real identity and location of the reptile worker will be hidden, ensuring the concealment and security of the reptile work. At the same time, the proxy server can also filter and process some malicious requests, providing additional security measures to ensure that the crawling work will not cause adverse effects on the target website.

In addition to the privacy and security benefits, IP rotating proxy services can also improve the efficiency of crawler work. By using multiple IP addresses, crawlers can make multiple requests at the same time and process different tasks in parallel, thus speeding up the speed of data fetching. This is essential for large-scale data acquisition and complex tasks.

2. Set up popular user agents: In crawler work, setting up popular user agents is a common strategy used to make crawlers appear as if they are visiting the site as real users. By simulating the request header information of real users, the crawler tool can pretend to be an ordinary user's browser when requesting web pages, thereby reducing the risk of being identified as a crawler and improving the success rate of crawling.

When the website receives a request from the crawler, it will view the user agent information in the request header, which includes the browser information, operating system and device to visit the website. If the crawler uses user agent information that is similar to the real user's browser information or the same as popular browsers, the site will most likely assume it is the real user and not the crawler, reducing its vigilance to the request.

②What are the solutions to the frequent disconnection of prox

Setting up popular user agents can also provide another benefit, which is to increase the stability and reliability of the crawler's work. Some sites may restrict or deny access from unidentified or unusual user agents, and using a popular user agent can prevent this from happening. In addition, popular user agents are usually extensively tested and optimized, have high compatibility, and are able to obtain web content normally, thus improving the success rate of crawler work.

3, avoid obvious crawling patterns: Avoid too frequent or regular crawling behavior, such as crawling the website 24 hours a day. Simulate the browsing behavior of real users, set the crawl interval reasonably, and avoid causing the suspicion of the website administrator.

4. Add referrer information: Add referrer information from some common websites, such as Google, YouTube or Facebook, to the request so that the website can identify your source. This way, the site will be more inclined to treat you as a real user, reducing the risk of being blocked.

5. Avoid honeypot traps: Some smart webmasters may set honeypot traps to detect crawlers and bots. Make sure your crawler tools and agents are able to navigate the site as real users and avoid clicking on links they shouldn't be visiting to avoid falling into a honeypot trap.

By adopting the above strategies, you can effectively protect the stealth and security of the crawling work, reduce the risk of being blacklisted, and successfully complete the data crawling task. At the same time, these strategies can also improve the accuracy and efficiency of the crawler work, resulting in better results for your crawler project.