History and development of session state in the HTTP protocol

The main goal of this bachelor thesis is to analyze new ways to store session state in the stateless HTTP protocol. Thesis including a description of the development of the HTTP protocol itself. Concerning the session state, the emphasis is on the characteristics of commonly used methods, and new methods that come with the HTML5 specification. The RFC documents and the specifications for new technology published by their creators were used as the main source of information. In the next chapter, the thesis includes a practical test of the new transport protocol SPDY, demonstrating its higher speed. Finally, as a part of this thesis, a simple web chat application based on new technologies using scripting languages PHP and JavaScript, namely WebSocket, Web Storage and IndexedDB, was created. The methods described in this work can serve as a guide to create similar web applications using new technology for less experienced developers. Topic of this thesis was mainly based on the evolution of web sites and the growing importance of local storage on the client side