HTTP Request – web browser atau http client merequest/mensubmit file/data ke server.
HTTP Response – data yang dikirimkan kembali dari webserver terhadap web browser atau http client menjawab http request nya.
Contoh, simple html form yang menggunakan jsp untuk validasi jawaban dari 5 + 5
File: form01.jsp
<%@page contentType=”text/html” pageEncoding=”UTF-8″%>
<!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML 4.01 Transitional//EN”
“http://www.w3.org/TR/html4/loose.dtd”><html>
<head>
<meta http-equiv=”Content-Type” content=”text/html; charset=UTF-8″>
<title>simple form</title>
</head>
<body>
<h1>simple form</h1>
<p>
<form name=”form01″ method=”post” action=””>
5 + 5 = <input type=”text” name=”answer” value=”” />
<input type=”submit” value=”submit” />
</form>
</p><%
String answer = request.getParameter(“answer”);
String jawaban = “10”;if((answer != null) || (answer != “”))
{
if(answer.equals(jawaban) == true)
{
//bener
out.print(“jawaban ” + answer + ” benar.”);
}
else
{
//salah
out.print(“jawaban ” + answer + ” salah.”);
}
}%>
</body>
</html>