<%@page pageEncoding="UTF-8"%>
<%@ page import="java.util.*,java.io.*" contentType="text/xml" %>
<%!
/**
* Get cookie to store information.
* @param name: name of cookie
* @param cookies: client cookies
*/
Cookie getCookie(String name, Cookie[] cookies) {
if (cookies != null) {
for (int i=0; i < cookies.length; i++) {
Cookie cookie = cookies[i];
if (cookie.getName().equals(name)) {
return cookie;
}
}
}
return new Cookie(name, "");
}
void showCookie(JspWriter out, Cookie cookie) throws IOException {
out.println("");
out.print("");
Map map = getCookieValues(cookie);
Iterator iter = map.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry e = (Map.Entry)iter.next();
String k = (String)e.getKey();
out.println("<" + k + ">" + (String)e.getValue() + "\n");
}
out.println("");
}
Map getCookieValues(Cookie cookie) throws IOException{
// saved as key1=val1&key2=val2&...
String str = cookie.getValue();
StringTokenizer st = new StringTokenizer(cookie.getValue(), "&");
Map map = new HashMap();
while (st.hasMoreTokens()) {
String pair = st.nextToken();
int index = pair.indexOf('=');
if (index == -1 || index == 0) continue;
String k = pair.substring(0, index);
String v = pair.substring(index+1);
map.put(k, v);
}
return map;
}
/**
* Copy parameter key/value pairs into cookie. Skips "op" and "name" parameters.
*/
void setValues(JspWriter out, Cookie cookie, Map params) throws IOException{
Iterator iter = params.entrySet().iterator();
Map cookieValues = getCookieValues(cookie);
while (iter.hasNext()) {
Map.Entry e = (Map.Entry)iter.next();
String k = (String)e.getKey();
// skip op and name
if (k.equals("op") || k.equals("name")) continue;
String[] values = (String[])e.getValue();
cookieValues.put(k, values[0]);
}
String newvalue = "";
iter = cookieValues.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry e = (Map.Entry)iter.next();
String k = (String)e.getKey();
String v = (String)e.getValue();
newvalue += k + "=" + v + "&";
}
cookie.setValue(newvalue);
}
%>
<%
// operation
String op = request.getParameter("op");
if ( op == null || op.equals("") ) {
out.println("error\nop: null or empty\n");
out.println("");
return;
}
// name of cookie
String name = request.getParameter("name");
if (name == null || name.equals("") ) {
out.println("error\nname: null or empty\n");
out.println("");
return;
}
Cookie cookie = getCookie(name, request.getCookies());
if ( op.equals("get") ) {
showCookie(out, cookie);
} else if ( op.equals("set") ) {
setValues(out, cookie, request.getParameterMap());
response.addCookie(cookie);
showCookie(out, cookie);
} else {
out.println("error\nno such op: " + op + "\n");
}
%>