What is a test environment for a mobile application?

The response body of an HTTP response is the main part that contains the data sent by the server to the client. What is included depends on the request type and resource:

1. HTML documents: The web page text displayed in the browser.
2. Images: Binary image data (JPEG, PNG, GIF, etc.).
3. JSON/XML data: Structured data often used for API communication.
4. Other file types: PDFs, audio, video files, etc.
5. Error messages: Details about errors occurred on the server.

The format and data type in the response body are determined by the Content-Type header in the HTTP response. For example:

Content-Type: text/html; charset=utf-8

Content-Type: application/json

Content-Type: image/jpeg

The absence of a response body is possible for certain statuses (e.g., 204 No Content) or HEAD requests.