How Does HTTP Work?
Web applications use HTTP for communications between the client’s web browser and the application code running on an application server. As with all communication protocols, a round-trip communication process consists of a request and a response. The request (also called an HTTP request) is a message asking for resources (such as an HTML page or image file) or an action from another computer. A response (also called an HTTP response) is a return message from the computer to which a request was sent. These messages often include browser content, such as HTML text or images. Figure 2-1 shows these two messages with some of their contents. Descriptions of the contents of the request and response messages, as well as methods and ...
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