In the capture of data, due to the capture speed is too block, there will be the same IP access too frequently, at this time the site will appear to verify or directly block the local IP. At this time, you can use the proxy to access the web page instead of your IP, and the proxy IP is changed, every time after a period of time will rotate the new proxy IP to visit the website, which greatly reduces the probability of IP blocked by the website. At present, there are many proxy providers on the Internet, there are free and paid points, many people do not recommend using free proxy crawler, why is this?
Free proxies are scraped in bulk from the web and, in theory, you can grab a large list of free proxies and put them on your host machine to ensure you don't get hung up by search engines. But in practice, most of these proxies don't work. Here's why:
1. Free IP is overused.
Because it's free, a lot of people will use it. If there are 15 people on an proxy and they are all scraping, then you will not be able to get through the search engine and your scraping will fail.
2. Low security of free proxy
The use of free proxy information security can not be guaranteed, your browsing habits, information data is easy to be obtained by a third party.
If there is too much doubt about the use of paid proxies, it is suggested to try it out first. Roxlabs provides a free trial of 500MB, including global residential IP, with unlimited extraction.
