In-depth understanding of HTTP protocol status codes and their classification
HTTP protocol status codes are used to indicate the server’s processing results of requests during the HTTP request and response process. A kind of logo. The status code consists of three digits and is divided into five categories, namely 1xx, 2xx, 3xx, 4xx and 5xx. In this article, we will take a deeper look at the specific meaning and usage scenarios of these status codes, and provide corresponding code examples.
1xx status code: Informational status code
1xx status code indicates that the server has received the request and is processing it, but further operations are required. The more common status codes are:
Code example:
HTTP/1.1 100 Continue HTTP/1.1 101 Switching Protocols
2xx class status code: Success status code
2xx class status code indicates that the server successfully received, understood, and processed the request. Common status codes are:
Code example:
HTTP/1.1 200 OK HTTP/1.1 201 Created HTTP/1.1 204 No Content
3xx class status code: Redirect status code
3xx class status code indicates that the browser needs to perform further operations to complete the request. Common status codes are:
Code example:
HTTP/1.1 301 Moved Permanently HTTP/1.1 302 Found HTTP/1.1 304 Not Modified
4xx class status code: Client error status code
4xx class status code indicates that the request sent by the client has an error. Common status codes include:
Code example:
HTTP/1.1 400 Bad Request HTTP/1.1 401 Unauthorized HTTP/1.1 403 Forbidden HTTP/1.1 404 Not Found
5xx class status code: Server error status code
5xx class status code indicates that an error has occurred within the server. Common status codes include:
Code sample:
HTTP/1.1 500 Internal Server Error HTTP/1.1 502 Bad Gateway HTTP/1.1 503 Service Unavailable
By having an in-depth understanding of HTTP protocol status codes and their classification, we can better handle various situations that may occur during HTTP requests and responses. In actual development, the reasonable use of appropriate status codes can improve the reliability and performance of the system. We hope that the code examples provided in this article can help readers better understand and apply HTTP protocol status codes.
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