What are status codes in HTTP

 

What are status codes in HTTP

HTTP status codes are three-digit numbers that are used to indicate the success or failure of an HTTP request. They are returned by the server in the response message.

What are status codes in HTTP Watch Video 

HTTP status codes are divided into five classes:

·         1xx Informational: These codes indicate that the request was received and is being processed.

·         2xx Successful: These codes indicate that the request was successful and the response is ready to be sent.

·         3xx Redirection: These codes indicate that the client needs to take additional action to complete the request.

·         4xx Client Error: These codes indicate that the client made a mistake in the request.

·         5xx Server Error: These codes indicate that the server encountered an error while processing the request.

Here are some of the most common HTTP status codes:

·         200 OK: The request was successful and the response is ready to be sent.

·         301 Moved Permanently: The requested resource has been moved to a new location.

·         400 Bad Request: The request was invalid and the server could not process it.

·         401 Unauthorized: The client does not have the necessary credentials to access the requested resource.

·         403 Forbidden: The client does not have permission to access the requested resource.

·         404 Not Found: The requested resource does not exist.

·         500 Internal Server Error: The server encountered an unexpected error while processing the request.

·         503 Service Unavailable: The server is currently unavailable and cannot process the request.

HTTP status codes are an important part of the HTTP protocol. They help to ensure that clients and servers can communicate with each other effectively.

Here is an example of how HTTP status codes are used:

 

GET /index.html HTTP/1.1
Host: example.com

HTTP/1.1 200 OK
Content-Type: text/html

<h1>Hello, world!</h1>

In this example, the client is requesting the index.html page from the example.com server. The server responds with a 200 OK status code, which indicates that the request was successful and the response is ready to be sent. The server also sends the Content-Type header, which indicates that the response body is in HTML format.

HTTP status codes are a valuable tool for developers and users alike. They can be used to troubleshoot problems with HTTP requests and responses, and to understand the state of a server.