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Nov 3, 2023 · HTTP response status codes indicate whether a specific HTTP request has been successfully completed. Responses are grouped in five classes: Informational responses ( 100 – 199) Successful responses ( 200 – 299) Redirection messages ( 300 – 399) Client error responses ( 400 – 499) Server error responses ( 500 – 599)
This is a list of Hypertext Transfer Protocol (HTTP) response status codes. Status codes are issued by a server in response to a client's request made to the server. It includes codes from IETF Request for Comments (RFCs), other specifications, and some additional codes used in some common applications of the HTTP.
- “Payment Required.” Originally, this code was created for use as part of a digital cash system. However, that plan never followed through. Instead, it’s used by a variety of platforms to indicate that a request cannot be fulfilled, usually due to a lack of required funds.
- “Access to that resource is forbidden.” This code is returned when a user attempts to access something that they don’t have permission to view. For example, trying to reach password-protected content without logging in might produce a 403 error.
- “The requested resource was not found.” This is the most common error message of them all. This code means that the requested resource does not exist, and the server does not know if it ever existed.
- “Method not allowed.” This is generated when the hosting server (origin server) supports the method received, but the target resource doesn’t.
- 1XX Status Codes – Informational. 1XX codes are informational responses from the website’s server. They do not generate content and only update clients on the progress of their requests.
- 2XX Status Codes – Success. The 2XX codes are the best responses you can receive. They indicate that the request was recognized by the server, was accepted, and is being processed.
- 3XX Status Codes – Redirection. 3XX codes specify that there will be a redirection. Redirects are commonly used when a resource is moved to a new address.
- 4XX Status Codes – Client Errors. The 4XX codes are HTTP error status codes. They define errors as invalid requests from your browser that the website’s server can’t process.
- Informational Responses. 100 Continue. readies for the client to continue with a request. 101 Switching Protocols. that it will be switching to another protocol.
- Success Response. 200 OK. For a successful transaction. 201 Created. For creating an entry in the database or updating details. 202 Accepted.
- Redirection Messages. 300 Multiple Choices. The requested URL refers to more than one resource. 301 Moved Permanently. The requested URL is no longer used by the server.
- Client Error Responses. 400 Bad Request. This response code indicates that the server detected a syntax error in the client’s request.
When you visit a website, your browser sends a request to the site’s server, and the server then responds to the browser’s request with a three-digit code: the HTTP status code. These status codes are the Internet equivalent of a conversation between your browser and the server.
HTTP status codes are three-digit responses from the server to the browser-side request. Everyone has probably gotten the classic 404 page-not-found error. That is an HTTP client error status code and there are a lot more of them.
