KLone is a multiplatform GPL-licensed SDK for building embedded web applications especially targeted for environments that are constrained in terms of memory, storage, CPU, and power consumption. KLone provides:

• the HTTP/S server itself
• an embedded file system which can be natively compressed and encrypted
• a framework for building dynamic pages in C/C++ with usual scripting style (i.e., <% /* C/C++ code */ %>)
• a helper library for easily handling form variables, sessions, and cookies
• other embedded features such as in-memory logging, cryptographically protected client side sessions, etc.

The latter is made possible by the absence of a middleware for active pages execution: both static and dynamic content are in fact transformed into C/C++ files, before being compiled and linked to the skeleton HTTP/S server to form a single, very small, executable file.

This talk will illustrate, from the inside, all the techniques we have developed and used to accomplish the task:

• transformation of active/dynamic pages in C source code
• blending web pages and the HTTP engine together
• registering resources inside the embedded file system
• run-time request/response dispatching