What are HTTP status codes
HTTP status code refers to the status code returned by the server when responding to the client's request in the HTTP protocol. It is used to indicate the result of the server processing the request. The HTTP status code consists of three digits. The first digit indicates the response category and defines the basic type of response, for example:
- 1xx: Information prompts
- 2xx: Success Category
- 3xx: Redirect class
- 4xx: client error class
- 5xx: Server error class
Common HTTP status codes include 200 OK (request successful), 404 Not Found (resource not found), 500 Internal Server Error (server internal error), etc. The client can handle different HTTP status codes differently.
Common code status in network status
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200 OK: Indicates that the request is successful and the server returns data successfully.
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400 Bad Request: Indicates that there is a syntax error in the request, usually the request parameter format is incorrect.
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401 Unauthorized: Indicates that the request is unauthorized and requires authentication.
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403 Forbidden: Indicates that the server rejects the request, has insufficient permissions, and access to the requested resource is prohibited.
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404 Not Found: Indicates that the requested resource does not exist.
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500 Internal Server Error: Indicates an internal error in the server and the request cannot be completed.
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503 Service Unavailable: Indicates that the server is temporarily unable to process the request, usually because the server is overloaded or under maintenance.
The above are common status codes, and there are other status codes such as 301, 302, 304, etc. The meaning of status codes can help developers understand the interaction process between requests and servers, and help troubleshoot problems and debug programs.
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