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/*
* Copyright 2011 Vaadin Ltd.
*
* Licensed 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 com.vaadin.server;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import com.vaadin.shared.ApplicationConstants;
import com.vaadin.shared.communication.URLReference;
public class ResourceReference extends URLReference {
private final Resource resource;
private final ClientConnector connector;
private final String key;
public ResourceReference(Resource resource, ClientConnector connector,
String key) {
this.resource = resource;
this.connector = connector;
this.key = key;
}
public Resource getResource() {
return resource;
}
@Override
public String getURL() {
if (resource instanceof ExternalResource) {
return ((ExternalResource) resource).getURL();
} else if (resource instanceof ConnectorResource) {
ConnectorResource connectorResource = (ConnectorResource) resource;
GlobalResourceHandler globalResourceHandler = connector.getUI()
.getSession().getGlobalResourceHandler(false);
if (globalResourceHandler != null) {
String uri = globalResourceHandler.getUri(connector,
connectorResource);
if (uri != null && !uri.isEmpty()) {
return uri;
}
}
// app://APP/connector/[uiid]/[cid]/[key]/[filename]
String prefix = key;
String filename = connectorResource.getFilename();
if (filename != null && !filename.isEmpty()) {
prefix += '/' + filename;
}
String uri = getConnectorResourceBase(prefix, connector);
return uri;
} else if (resource instanceof ThemeResource) {
final String uri = "theme://"
+ ((ThemeResource) resource).getResourceId();
return uri;
} else {
throw new RuntimeException(getClass().getSimpleName()
+ " does not support resources of type: "
+ resource.getClass().getName());
}
}
private static String getConnectorResourceBase(String filename,
ClientConnector connector) {
String uri = ApplicationConstants.APP_PROTOCOL_PREFIX
+ ApplicationConstants.APP_PATH + '/'
+ ConnectorResource.CONNECTOR_PATH + '/'
+ connector.getUI().getUIId() + '/'
+ connector.getConnectorId() + '/' + encodeFileName(filename);
return uri;
}
public static String encodeFileName(String filename) {
// #7738 At least Tomcat and JBoss refuses requests containing
// encoded slashes or backslashes in URLs. Application resource URLs
// should really be passed in another way than as part of the path
// in the future.
return urlEncode(filename).replace("%2F", "/").replace("%5C", "\\");
}
static String urlEncode(String filename) {
try {
return URLEncoder.encode(filename, "UTF-8");
} catch (UnsupportedEncodingException e) {
throw new RuntimeException(
"UTF-8 charset not available (\"this should never happen\")",
e);
}
}
public static ResourceReference create(Resource resource,
ClientConnector connector, String key) {
if (resource == null) {
return null;
} else {
return new ResourceReference(resource, connector, key);
}
}
public static Resource getResource(URLReference reference) {
if (reference == null) {
return null;
}
assert reference instanceof ResourceReference;
return ((ResourceReference) reference).getResource();
}
}
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