/*
* $Id: PortletUrlHelper.java 497293 2007-01-18 03:13:27Z mrdon $
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.struts2.portlet.util;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.StringTokenizer;
import javax.portlet.PortletMode;
import javax.portlet.PortletSecurityException;
import javax.portlet.PortletURL;
import javax.portlet.RenderRequest;
import javax.portlet.RenderResponse;
import javax.portlet.WindowState;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts2.StrutsException;
import org.apache.struts2.portlet.PortletActionConstants;
import org.apache.struts2.portlet.context.PortletActionContext;
import com.opensymphony.xwork2.util.TextUtils;
/**
* Helper class for creating Portlet URLs. Portlet URLs are fundamentally different from regular
* servlet URLs since they never target the application itself; all requests go through the portlet
* container and must therefore be programatically constructed using the
* {@link javax.portlet.RenderResponse#createActionURL()} and
* {@link javax.portlet.RenderResponse#createRenderURL()} APIs.
*
*/
public class PortletUrlHelper {
public static final String ENCODING = "UTF-8";
private static final Log LOG = LogFactory.getLog(PortletUrlHelper.class);
/**
* Create a portlet URL with for the specified action and namespace.
*
* @param action The action the URL should invoke.
* @param namespace The namespace of the action to invoke.
* @param params The parameters of the URL.
* @param type The type of the url, either <tt>action</tt> or <tt>render</tt>
* @param mode The PortletMode of the URL.
* @param state The WindowState of the URL.
* @return The URL String.
*/
public static String buildUrl(String action, String namespace, Map params,
String type, String mode, String state) {
return buildUrl(action, namespace, params, null, type, mode, state,
true, true);
}
/**
* Create a portlet URL with for the specified action and namespace.
*
* @see #buildUrl(String, String, Map, String, String, String)
*/
public static String buildUrl(String action, String namespace, Map params,
String scheme, String type, String portletMode, String windowState,
boolean includeContext, boolean encodeResult) {
RenderRequest request = PortletActionContext.getRenderRequest();
RenderResponse response = PortletActionContext.getRenderResponse();
LOG.debug("Creating url. Action = " + action + ", Namespace = "
+ namespace + ", Type = " + type);
namespace = prependNamespace(namespace, portletMode);
if (!TextUtils.stringSet(portletMode)) {
portletMode = PortletActionContext.getRenderRequest().getPortletMode().toString();
}
String result = null;
int paramStartIndex = action.indexOf('?');
if (paramStartIndex > 0) {
String value = action;
action = value.substring(0, value.indexOf('?'));
String queryStr = value.substring(paramStartIndex + 1);
StringTokenizer tok = new StringTokenizer(queryStr, "&");
while (tok.hasMoreTokens()) {
String paramVal = tok.nextToken();
String key = paramVal.substring(0, paramVal.indexOf('='));
String val = paramVal.substring(paramVal.indexOf('=') + 1);
params.put(key, new String[] { val });
}
}
if (TextUtils.stringSet(namespace)) {
StringBuffer sb = new StringBuffer();
sb.append(namespace);
if(!action.startsWith("/") && !namespace.endsWith("/")) {
sb.append("/");
}
action = sb.append(action).toString();
LOG.debug("Resulting actionPath: " + action);
}
params.put(PortletActionConstants.ACTION_PARAM, new String[] { action });
PortletURL url = null;
if ("action".equalsIgnoreCase(type)) {
LOG.debug("Creating action url");
url = response.createActionURL();
} else {
LOG.debug("Creating render url");
url = response.createRenderURL();
}
params.put(PortletActionConstants.MODE_PARAM, portletMode);
url.setParameters(ensureParamsAreStringArrays(params));
if ("HTTPS".equalsIgnoreCase(scheme)) {
try {
url.setSecure(true);
} catch (PortletSecurityException e) {
LOG.error("Cannot set scheme to https", e);
}
}
try {
url.setPortletMode(getPortletMode(request, portletMode));
url.setWindowState(getWindowState(request, windowState));
} catch (Exception e) {
LOG.error("Unable to set mode or state:" + e.getMessage(), e);
}
result = url.toString();
// TEMP BUG-WORKAROUND FOR DOUBLE ESCAPING OF AMPERSAND
if(result.indexOf("&") >= 0) {
result = result.replace("&", "&");
}
return result;
}
/**
*
* Prepend the namespace configuration for the specified namespace and PortletMode.
*
* @param namespace The base namespace.
* @param portletMode The PortletMode.
*
* @return prepended namespace.
*/
private static String prependNamespace(String namespace, String portletMode) {
StringBuffer sb = new StringBuffer();
PortletMode mode = PortletActionContext.getRenderRequest().getPortletMode();
if(TextUtils.stringSet(portletMode)) {
mode = new PortletMode(portletMode);
}
String portletNamespace = PortletActionContext.getPortletNamespace();
String modeNamespace = (String)PortletActionContext.getModeNamespaceMap().get(mode);
LOG.debug("PortletNamespace: " + portletNamespace + ", modeNamespace: " + modeNamespace);
if(TextUtils.stringSet(portletNamespace)) {
sb.append(portletNamespace);
}
if(TextUtils.stringSet(modeNamespace)) {
if(!modeNamespace.startsWith("/")) {
sb.append("/");
}
sb.append(modeNamespace);
}
if(TextUtils.stringSet(namespace)) {
if(!namespace.startsWith("/")) {
sb.append("/");
}
sb.append(namespace);
}
LOG.debug("Resulting namespace: " + sb);
return sb.toString();
}
/**
* Encode an url to a non Struts action resource, like stylesheet, image or
* servlet.
*
* @param value
* @return encoded url to non Struts action resources.
*/
public static String buildResourceUrl(String value, Map params) {
StringBuffer sb = new StringBuffer();
// Relative URLs are not allowed in a portlet
if (!value.startsWith("/")) {
sb.append("/");
}
sb.append(value);
if(params != null && params.size() > 0) {
sb.append("?");
Iterator it = params.keySet().iterator();
try {
while(it.hasNext()) {
String key = (String)it.next();
String val = (String)params.get(key);
sb.append(URLEncoder.encode(key, ENCODING)).append("=");
sb.append(URLEncoder.encode(val, ENCODING));
if(it.hasNext()) {
sb.append("&");
}
}
} catch (UnsupportedEncodingException e) {
throw new StrutsException("Encoding "+ENCODING+" not found");
}
}
RenderResponse resp = PortletActionContext.getRenderResponse();
RenderRequest req = PortletActionContext.getRenderRequest();
return resp.encodeURL(req.getContextPath() + sb.toString());
}
/**
* Will ensure that all entries in <code>params</code> are String arrays,
* as requried by the setParameters on the PortletURL.
*
* @param params The parameters to the URL.
* @return A Map with all parameters as String arrays.
*/
public static Map ensureParamsAreStringArrays(Map params) {
Map result = null;
if (params != null) {
result = new HashMap(params.size());
Iterator it = params.keySet().iterator();
while (it.hasNext()) {
Object key = it.next();
Object val = params.get(key);
if (val instanceof String[]) {
result.put(key, val);
} else {
result.put(key, new String[] { val.toString() });
}
}
}
return result;
}
/**
* Convert the given String to a WindowState object.
*
* @param portletReq The RenderRequest.
* @param windowState The WindowState as a String.
* @return The WindowState that mathces the <tt>windowState</tt> String, or if
* the Sring is blank, the current WindowState.
*/
private static WindowState getWindowState(RenderRequest portletReq,
String windowState) {
WindowState state = portletReq.getWindowState();
if (TextUtils.stringSet(windowState)) {
state = portletReq.getWindowState();
if ("maximized".equalsIgnoreCase(windowState)) {
state = WindowState.MAXIMIZED;
} else if ("normal".equalsIgnoreCase(windowState)) {
state = WindowState.NORMAL;
} else if ("minimized".equalsIgnoreCase(windowState)) {
state = WindowState.MINIMIZED;
}
}
if(state == null) {
state = WindowState.NORMAL;
}
return state;
}
/**
* Convert the given String to a PortletMode object.
*
* @param portletReq The RenderRequest.
* @param portletMode The PortletMode as a String.
* @return The PortletMode that mathces the <tt>portletMode</tt> String, or if
* the Sring is blank, the current PortletMode.
*/
private static PortletMode getPortletMode(RenderRequest portletReq,
String portletMode) {
PortletMode mode = portletReq.getPortletMode();
if (TextUtils.stringSet(portletMode)) {
mode = portletReq.getPortletMode();
if ("edit".equalsIgnoreCase(portletMode)) {
mode = PortletMode.EDIT;
} else if ("view".equalsIgnoreCase(portletMode)) {
mode = PortletMode.VIEW;
} else if ("help".equalsIgnoreCase(portletMode)) {
mode = PortletMode.HELP;
}
}
if(mode == null) {
mode = PortletMode.VIEW;
}
return mode;
}
}
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