Serverless Programming Cookbook

HTTP essentials

HTTP stands for Hypertext Transfer Protocol, and it is used for exchanging documents (referred to as hypertext) over the internet. A hypertext is a text with links (hyperlinks) to other documents. HTTP provides a set of verbs for specifying the operations that we need to perform on a resource, and a set of response codes that the server can return to the client.

The following HTTP verbs (methods) are generally used with REST APIs: GET, for retrieving data; HEAD, for getting the header (similar to GET, but without the body); POST, for non-idempotent requests (for example, creating an ID); PUT, for idempotent requests (for example, override updates); PATCH, for partial updates; and DELETE, for deleting resources. OPTIONS is ...