In the process of using the proxy IP, users may encounter a variety of error codes, some of which are caused by the proxy IP, while others are problems with the website itself. Understanding these common error codes is important for users to better understand and resolve the problem. Here are some common error codes and what they mean:
1, 3XX error code: 3XX error code is a class of HTTP status codes, used to indicate that the user's requested resource has been redirected. A redirect is when a user accesses a URL and the server redirects the user to another URL, usually because the original URL has changed or been moved to a different location. Such a status code is usually returned by the server to tell the client to redirect.
Among them, the most common 3XX error codes are 301 and 302 status codes. The following details the meaning of the two status codes:
301 Permanent redirect: When the server returns a 301 status code, it means that the requested resource has been permanently moved to a new URL. This means that all requests to the original URL should be redirected to the new URL, and the search engine will also pass the weight from the original URL to the new URL. 301 redirects are often used when a website changes a domain name or URL structure to ensure that the old URL points to the new URL correctly.
①Application field and solution of HTTP proxy
302 Temporary Redirection: Unlike the 301 status code, when the server returns a 302 status code, it indicates that the requested resource has been temporarily moved to a new URL. This means that the client should still use the original URL for subsequent requests. 302 redirects are often used for temporary page redirects, or in some cases for A/B testing.
When a user's request encounters a 3XX error code, their browser or proxy automatically redirects them to a new URL. In the case of proxy IP, if the request does not contain the necessary information causing redirection problems, you can specify the user agent configuration in the proxy Settings to ensure that the request contains the necessary information to resolve the redirection problem.
2, 4XX error code: belongs to the client error, when the user sent a request to the server is misunderstood or inaccurate will receive this error, resulting in the page cannot load. For example, the 401 error code indicates that you do not have access to the target site, which is why the page cannot load. The 403 error code means that the user is blocked from accessing the site, the request is understood but the site does not want to grant access. The 404 error code means "not found" and usually appears when the server does not want to disclose the reason for its denial of access. A 407 error code is a tunnel connection failure or requires proxy authentication.
3, 5XX error code: belongs to the internal server-side error or the server of the site has a problem and cannot be specified. When using a proxy provider, 502 is the most commonly received status code, and it refers to a gateway error or timeout where one server receives an invalid response from another server.
②What problems do crawlers encounter when grabbing web data?
In addition to the common error codes mentioned above, you may encounter a variety of other error codes, such as a 503 error code indicating that the service is unavailable, a 504 error code indicating that the gateway times out, and so on. When using the proxy IP address, if you encounter these error codes, you can check the proxy Settings, adjust the request mode, and change the proxy IP address to solve the problem.
In general, understanding the common error codes helps users better understand the problems that may be encountered in the use of proxy IP, and can solve these problems more quickly and accurately, improving the efficiency and stability of proxy use. Therefore, when using proxy IP, it is recommended that users be aware of common error codes and always follow the service and support of the proxy provider to ensure the best proxy experience.
