HTTP is mainly used in crawling large data capture, network crawling if you want to capture a large amount of data in a relatively short period of time, you need to cooperate with the use of HTTP proxy IP, network crawlers do not have a proxy IP, it can be said that it is difficult to inch forward.
Most websites will set a threshold, when the number of visits to a certain IP reached the threshold will be limited; there are many websites will set a visit frequency, when the unit time visit frequency of the anti-human will be limited, this time only the proxy IP can break through this limit.
One can access some normally inaccessible websites through the IP proxy, we often encounter the phenomenon of the browser empty when surfing the Internet, this time the http proxy will come in handy, such as the high anonymity of the IP massive resources IPIDEA.
The second is to enhance the speed of network browsing. Some friends often encounter the problem of network slowdown, this time if you apply the appropriate proxy server, not only the speed of the network to enhance, and the effect is still very obvious.