nl.mineleni.cbsviewer.servlet

Class ReverseProxyServlet

java.lang.Object

javax.servlet.GenericServlet

javax.servlet.http.HttpServlet

nl.mineleni.cbsviewer.servlet.AbstractBaseServlet

nl.mineleni.cbsviewer.servlet.ReverseProxyServlet

All Implemented Interfaces:

Serializable, Servlet, ServletConfig

public class ReverseProxyServlet
extends AbstractBaseServlet

Dit is een proxy servlet voor WxS services; ter verhelping van het single domain javascript policy fenomeen.
Servlet configuratie:

  <servlet>
     <servlet-name>ReverseProxyServlet</servlet-name>
     <display-name>ReverseProxyServlet</display-name>
     <description>reverse proxy servlet om XHR te laten werken</description>
     <servlet-class>nl.mineleni.cbsviewer.servlet.ReverseProxyServlet</servlet-class>
  <init-param>
    <param-name>allowed_hosts</param-name>
    <param-value>dbr4011v.dbr.agro.nl; ws.geonames.org; cacheflow.nic.agro.nl:8080</param-value>
    <description>Servers die zijn toegestaan om te benaderen via deze proxy, scheiden door een ; [punt-komma]. Verplichte param</description>
  </init-param>
  <init-param>
    <param-name>force_xml_mime</param-name>
    <param-value>false</param-value>
  <description>optie om text/xml mime type voor response te forceren, optionele param</description>
  </init-param>
    <load-on-startup>2</load-on-startup>
  </servlet>
 

Since:

1.7

Author:

prinsmc

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static String	ALLOWED_HOSTS Allowed hosts config optie.
static String	ERR_MSG_MISSING_CONFIG Foutmelding in geval van missende 'allowed_hosts' optie.
static String	FORCE_XML_MIME Forceer xml output optie sleutel.

Fields inherited from class nl.mineleni.cbsviewer.servlet.AbstractBaseServlet

USER_ID, USER_PASSWORD

Constructor Summary

Constructors

Constructor and Description
ReverseProxyServlet()

Method Summary

Modifier and Type	Method and Description
void	destroy()
protected void	doGet(HttpServletRequest request, HttpServletResponse response) Process the HTTP Get request.
void	init(ServletConfig config) Initialize variables called when context is initialized.

Methods inherited from class nl.mineleni.cbsviewer.servlet.AbstractBaseServlet

getPassID, getProxyHost, getProxyPort, getUserID

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service, service

Methods inherited from class javax.servlet.GenericServlet

getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ALLOWED_HOSTS

public static final String ALLOWED_HOSTS

Allowed hosts config optie. "allowed_hosts"

See Also:

Constant Field Values

FORCE_XML_MIME

public static final String FORCE_XML_MIME

Forceer xml output optie sleutel. "force_xml_mime"

See Also:

Constant Field Values

ERR_MSG_MISSING_CONFIG

public static final String ERR_MSG_MISSING_CONFIG

Foutmelding in geval van missende 'allowed_hosts' optie. "De \'allowed_hosts\' parameter ontbreekt in servletconfig."

See Also:

Constant Field Values

Constructor Detail

ReverseProxyServlet

public ReverseProxyServlet()

Method Detail

destroy

public void destroy()

Specified by:

destroy in interface Servlet

Overrides:

destroy in class GenericServlet

doGet

protected void doGet(HttpServletRequest request,
                     HttpServletResponse response)
              throws ServletException

Process the HTTP Get request. Voor een Openlayers proxy wordt de url dan iets van:
WMSproxy/proxy?
waarin WMSproxy de naam van de webapp is en proxy de servlet mapping.

Overrides:

doGet in class HttpServlet

Parameters:

request - the request

response - the response

Throws:

ServletException - the servlet exception

init

public void init(ServletConfig config)
          throws ServletException

Initialize variables called when context is initialized. Leest de waarden van ALLOWED_HOSTS (verplichte optie) en FORCE_XML_MIME uit de configuratie.

Specified by:

init in interface Servlet

Overrides:

init in class AbstractBaseServlet

Parameters:

config - the ServletConfig object that contains configutation information for this servlet

Throws:

ServletException - if an exception occurs that interrupts the servlet's normal operation

See Also:

GenericServlet.init(javax.servlet.ServletConfig)