Due to the application scenario requirements of Internet big data, workers in the Internet industry need touse proxy IP.Because the application scenarios are different, the functions of using proxy IP are also different, and the final channels obtained will also be different. The main channels are to build your own proxy IP, third-party platforms to obtain paid proxy IP, crawler software to obtain free agents, etc. When an HTTP proxy fails, the main reasons may be as follows:
1. Authorization failed
Most regular IP proxies require an authorization whitelist before use. If the authorization whitelist fails during use, you will be unable to access the website.
2. Proxy IP anonymity is not enough
If the proxy IP hasinsufficient anonymity, it will also be discovered by the target website. There are many types of proxy IPs, including open and transparent proxies and ordinary proxies. However, these proxies are not anonymous enoughand are very easy to be seen through.Choosing a highly anonymous proxy can completely protect your local real IP and will not be easily discovered.
3. IP invalid
If the extracted IP is not used in time, it will also cause the proxy IP to fail. Some users misunderstood a problem, thinking that the proxy IP's survival time is calculated from the time of use. In fact,the proxy IP's survival time is calculated from the time it is extracted through the API. If the proxy IP is not used in time and the proxy IP becomes invalid, the website cannot be accessed.
4. IP invalid
No proxy is 100% effective, and it is common for proxy IPs to be blocked. Many users know that frequent access to the proxy IP is not allowed. Because the proxy IP pool of some operators is relatively small, many people may have used the same IP, so they have been affected before visiting a certain website.