* If prefix is specified, it is also used to
* instruct the client to limit the scope of the
* browser cookie. to that prefix.
*
*
map
* ident argument to
* {@link SessionManager#getSession} to get the table of valid
* cookies, used to map the cookie value to a Session ID. By default,
* the Session ID stored in the request is the cookie value itself.
* exist
* SessionManager.
* Normally, if the cookie was not present, a new cookie is
* automatically created.
*
* session
* gotCookie is set to the cookie name. Otherwise it is left unset.
*
* @author Stephen Uhler
* @version 2.2, 06/11/13
*/
public class CookieSessionHandler
implements Handler
{
private static final String COOKIE = "cookie";
private static final String MAP = "map";
private static final String EXIST = "exist";
private static final String PERSIST = "persist";
private static final String PROPERTY = "session";
private static final String URLPREFIX = "prefix";
public String cookieName = "cookie";
public String ident = "";
public boolean mustExist = false;
public boolean persist = false;
public String session = "SessionID";
MatchString isMine; // check for matching url
String urlPrefix;
String propsPrefix;
Regexp cookie;
public boolean
init(Server server, String propsPrefix)
{
this.propsPrefix = propsPrefix;
Properties props = server.props;
isMine = new MatchString(propsPrefix, server.props);
cookieName = props.getProperty(propsPrefix + COOKIE, cookieName);
ident = props.getProperty(propsPrefix + MAP, ident);
mustExist = props.getProperty(propsPrefix + EXIST) != null;
persist = props.getProperty(propsPrefix + PERSIST) != null;
session = props.getProperty(propsPrefix + PROPERTY, session);
urlPrefix = props.getProperty(propsPrefix + URLPREFIX, "/");
cookie = new Regexp("(^|; *)" + cookieName + "=([^;]*)");
return true;
}
public boolean
respond(Request request) throws IOException {
if (!isMine.match(request.url)) {
return false;
}
String current = request.props.getProperty(session);
if (current != null && !current.equals("")) {
request.log(Server.LOG_INFORMATIONAL, propsPrefix,
session + " already exists, skipping");
return false;
}
/*
* Get the cookie out of the http header. Cookies can be on separate
* lines or all combined on one line. When multiple cookies are on
* one line, they are separated by ';' characters.
*/
String value = null;
String[] subs = new String[3];
MimeHeaders headers = request.headers;
for (int i = headers.size(); --i >= 0; ) {
if (headers.getKey(i).equalsIgnoreCase("Cookie") == false) {
continue;
}
if (cookie.match(headers.get(i), subs)) {
value = subs[2];
if (value.length() == 0) {
value = null;
}
break;
}
}
/* existing session, client can handle sessions */
if (value != null) {
request.props.put("gotCookie", "true");
}
/*
* If present, map cookie to Session ID. Otherwise, Session ID is
* cookie.
*/
String id = value;
if (id != null) {
Hashtable h = (Hashtable) SessionManager.getSession(null, ident,
Hashtable.class);
id = (String) h.get(id);
if (id == null) {
id = value;
}
}
/*
* Check if Session ID corresponds to an existing session.
*/
if ((id != null) && mustExist) {
if (SessionManager.getSession(id, null, null) == null) {
id = null;
}
}
/*
* If Session ID was missing or wasn't known, make a new cookie.
*/
// System.out.println("must exist " + mustExist);
if (id != null) {
request.log(Server.LOG_INFORMATIONAL, propsPrefix,
"Using cookie: " + value);
} else if (mustExist == false) {
String expire = "";
if (persist) {
expire="; EXPIRES=Fri, 01-Jan-25 00:00:00 GMT";
}
if (value == null) {
value = Guid.getString();
request.log(Server.LOG_INFORMATIONAL, propsPrefix,
"Creating new cookie: " + value);
request.addHeader("Set-Cookie", cookieName + "=" + value +
"; PATH=" + urlPrefix + expire);
}
id = value;
}
if (id != null) {
request.props.put(session, id);
}
return false;
}
}