package edu.sjtu.infosec.ismp.manager.EM.util;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Convenience class for setting and retrieving cookies.
*/
public class RequestUtil {
/**
* ��日志
* */
private static transient Log log = LogFactory.getLog(RequestUtil.class);
/**
* Convenience method to set a cookie
*
* @param response response
* @param name name
* @param value value
* @param path path
*/
public static void setCookie(HttpServletResponse response, String name,
String value, String path) {
if (log.isDebugEnabled()) {
log.debug("Setting cookie '" + name + "' on path '" + path + "'");
}
Cookie cookie = new Cookie(name, value);
cookie.setSecure(false);
cookie.setPath(path);
cookie.setMaxAge(new Integer("3600").intValue()
* new Integer("24").intValue()
* new Integer("30").intValue()); // 30 days
response.addCookie(cookie);
}
/**
* Convenience method to get a cookie by name
*
* @param request the current request
* @param name the name of the cookie to find
*
* @return the cookie (if found), null if not found
*/
public static Cookie getCookie(HttpServletRequest request, String name) {
Cookie[] cookies = request.getCookies();
Cookie returnCookie = null;
if (cookies == null) {
return returnCookie;
}
for (int i = 0; i < cookies.length; i++) {
Cookie thisCookie = cookies[i];
if (thisCookie.getName().equals(name)) {
// cookies with no value do me no good!
if (!thisCookie.getValue().equals("")) {
returnCookie = thisCookie;
break;
}
}
}
return returnCookie;
}
/**
* Convenience method for deleting a cookie by name
*
* @param response the current web response
* @param cookie the cookie to delete
* @param path the path on which the cookie was set (i.e. /appfuse)
*/
public static void deleteCookie(HttpServletResponse response,
Cookie cookie, String path) {
if (cookie != null) {
// Delete the cookie by setting its maximum age to zero
cookie.setMaxAge(0);
cookie.setPath(path);
response.addCookie(cookie);
}
}
/**
* Convenience method to get the application's URL based on request
* variables.
* @param request request
* @return AppURL
*/
public static String getAppURL(HttpServletRequest request) {
StringBuffer url = new StringBuffer();
int port = request.getServerPort();
if (port < 0) {
port = new Integer("80").intValue(); // Work around java.net.URL bug
}
String scheme = request.getScheme();
url.append(scheme);
url.append("://");
url.append(request.getServerName());
if ((scheme.equals("http") && (port != new Integer("80").intValue()))
|| (scheme.equals("https") && (port != new Integer("443").intValue()))) {
url.append(':');
url.append(port);
}
url.append(request.getContextPath());
return url.toString();
}
}