Refer: Head First JSP and Servlet.

1. Mini Mvc Tutorial Francesco Ierna

3. 1.2. Request interface, write code which give paramters from the request, http header or cookies

4. 1.3. Response to manage header, content-type, acquisire text-stream, binary stream, redirect or aggiungere cookie

5. 1.4. Lifecicle servlet

6. 2.1 Build web app with jsp, html, servlet, web.xml, tag, jar and java files

7. 2.2. servlet in web.xml

8. 2.3. error-page, init-param , mime-mapping, servlet, servlet-class, servlet-name and welcome-file

10. Container searchs on web.xml an url-pattern with /FirstServlet

11. Take the name and searchs a servlet-name

12. From the servlet name take the servlet-class

14. 2. directory match

15. 3. extentions match

18. Instanzia class -> constructor

22. Service() -> non consigliabile perchè è responsabile di scegliere fra get o post in base alla richiesta del client

23. Get post -> necessario per effettuare regole di business

24. Destroy() -> solo se si vuole rilasciare qualche risorsa

25. Attenzione ad ogni richiesta un THREAD.

30. Url limited

32. Unlimited and has a body

34. PUT -> Insert resources withing the web-app (files etc)

35. DELETE -> delete resources from the web-app

36. CONNECT -> say if we have a connection

37. OPTIONS -> say what methods we have allowed

38. TRACE -> for the tests

39. Signature:

40. protected void doXXX(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException Tutti tranne connect. Appartengono alla classe HttpServletRequest

42. Cookie -> Cookie[] getCookies()

43. Methods -> String getMethod()

45. For example if we've just received a request from IP 10.0.2.11 over the port 22047 from myWeb.example.com : ContextPath--> /frigoproject (nome del progetto) LocalAddr----> 0.0.0.0 LocalPort----> 8080 PathInfo-----> null RemoteAddr---> 10.0.2.11 (request da parte di un client) RemoteHost---> myWeb.example.com RemotePost---> 49566 RemoteUser---> null RequestURI---> /frigoproject/UserServlet (context + servlet). Risorse RequestURL---> http://localhost:8080/frigoproject/AlimentoServlet ServerName---> localhost (nome del server anche www.) ServerPort---> 22047 ( def 8080) (porta) ServletPath--> /UserServlet (servlet) ServletInfo----> ServletName----> AlimentoServlet

47. ServletOutputStream sos = getOutputStream() -> take the stream from the request

48. PrintWriter writer = getWriter() -> write char into the response and give it to the client

49. addCookie(cookie) -> adding cookies to the response

52. resetBuffer() -> reset the buffer

54. We must call setContentType before getWriter to change the response's charset

56. No commit after it. Ad es: flush.

58. Throught RequestDispatcher from the request or from the context

59. Take req e resp