HTTP

Cheatsheet for the Hypertext Transfer Protocol.

Request Methods

Common and often used HTTP request methods you should know. Read more here.

Method	Description
GET	Send named resource from the server to the client.
HEAD	Send just the HTTP headers from the response for the named resource.
POST	Send client data into a server gateway application.
PUT	Store data from client into a named server resource.
DELETE	Delete the named resource from a server.

Status Codes

Common and often used HTTP status codes you should know. Read more here.

2xx

These status codes indicate that the request was successfully received, understood, and accepted.

Code	Description
200 OK	Standard response for successful HTTP requests.
201 Created	The request succeeded and a new resource was created. Often used after a successful POST request.
204 No Content	The request succeeded but no content was returned. Might be used after a successful DELETE request.

3xx

These status codes indicate a redirection and that further action needs to be taken by the user agent in order to fulfill the request.

Code	Description
301 Moved Permanently	The URL of the requested resource has been changed permanently and the new URL is provided in the response.
304 Not Modified	The response was cached and has not been modified.

4xx

These status codes indicate that there occured an error on the client side.

Code	Description
400 Bad Request	The server cannot process the received request from the user. For example if a form value is invalid.
401 Unauthorized	Equivalent to "unauthenticated". The client must authenticate itself. For example via JWT.
403 Forbidden	The client does not have access rights to the content.
404 Not Found	The requested resource does not exist on the server side.

5xx

These status codes indicate that there occured an error on the server side.

Code	Description
500 Internal Server Error	The server encountered an unexpected condition and cannot fulfill the request.

Further Resources

Read more here:

• RFC 9110

• HTTP: The Definitive Guide