WHAT IS REST?

WHAT IS REST?

1. REPRESENTATIONAL STATE TRANSFER

   • is an architectural style for providing standards between computer systems on the web

2. SEPARATION OF CLIENT AND SERVER

   • RESTful systems, are characterized by how they are stateless and separate the concerns of client and server
     • This means that it doesn't matter if the code of the client or the code of the system changes the operation will not change
       • the separation allows each component the ability to evolve independently.

3. STATELESSNESS

   • the server does not need to know anything about what state the client is in and vice versa.
     • both the server and the client can understand any message received
       • These constraints help RESTful applications achieve reliability, quick performance, and scalability

4. COMMUNICATION BETWEEN CLIENT AND SERVER

   • clients send requests to retrieve or modify resources, and servers send responses to these requests
     • MAKING REQUESTS
       • REST requires that a client make a request to the server in order to retrieve or modify data on the server
         • an HTTP verb
           • GET, POST, PULL, AND DEETE
         • a header
           • the client sends the type of content that it is able to receive from the server
             • MIME Types, used to specify the content types in the Accept field, consist of a type and a subtype. They are separated by a slash (/).
               • image — image/png, image/jpeg, image/gif
         • a path to a resource
           • Requests must contain a path to a resource that the operation should be performed on
             • Paths should contain the information necessary to locate a resource with the degree of specificity needed
         • an optional message body containing data

5. SENDING RESPONSES

   • CONTENT TYPES
     • In cases where the server is sending a data payload to the client, the server must include a content-type in the header of the response
   • RESPONSE CODES
     • Responses from the server contain status codes to alert the client to information about the success of the operation

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