What is the primary purpose of the Http class?

The primary purpose of the Http class is to initiate an HTTP request and response. This class is essential for making web service calls and facilitates the communication between a client and a server over the HTTP protocol. It provides methods to configure request details, such as setting the endpoint, HTTP method (GET, POST, etc.), headers, and body content.

When using this class, developers can send requests to web services and handle the corresponding responses, which include status codes and response bodies. This foundational capability is crucial for integrating Salesforce with external systems or APIs, enabling seamless data exchange and functionality.

The other options describe aspects related to HTTP but do not capture the full scope of the Http class's functionality. Defining an HTTP response, generating error codes, or creating request objects are specific tasks that are part of the broader process of making an HTTP request and processing the resulting response. However, the Http class encompasses all these actions, focusing primarily on the initiation of the request and managing the flow back and forth between the client and server.