/* | |
* 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.openmeetings.web.util; | |
import org.apache.wicket.ajax.AjaxRequestTarget; | |
import org.apache.wicket.behavior.AbstractAjaxBehavior; | |
import org.apache.wicket.request.handler.resource.ResourceStreamRequestHandler; | |
import org.apache.wicket.request.resource.ContentDisposition; | |
import org.apache.wicket.util.resource.IResourceStream; | |
/** | |
* see: <a href="https://cwiki.apache.org/confluence/display/WICKET/AJAX+update+and+file+download+in+one+blow"> | |
* https://cwiki.apache.org/confluence/display/WICKET/AJAX+update+and+file+download+in+one+blow</href> | |
* | |
*/ | |
public class AjaxDownload extends AbstractAjaxBehavior { | |
private static final long serialVersionUID = 1L; | |
private boolean addAntiCache; | |
private String fileName; | |
private IResourceStream resourceStream; | |
public AjaxDownload() { | |
this(true); | |
} | |
public AjaxDownload(boolean addAntiCache) { | |
super(); | |
this.addAntiCache = addAntiCache; | |
} | |
/** | |
* Call this method to initiate the download. | |
*/ | |
public void initiate(AjaxRequestTarget target) { | |
String url = getCallbackUrl().toString(); | |
if (addAntiCache) { | |
url = url + (url.contains("?") ? "&" : "?"); | |
url = url + "antiCache=" + System.currentTimeMillis(); | |
} | |
// the timeout is needed to let Wicket release the channel | |
target.appendJavaScript("setTimeout(\"window.location.href='" + url | |
+ "'\", 100);"); | |
} | |
public void onRequest() { | |
ResourceStreamRequestHandler handler = new ResourceStreamRequestHandler( | |
getResourceStream(), getFileName()); | |
handler.setContentDisposition(ContentDisposition.ATTACHMENT); | |
getComponent().getRequestCycle().scheduleRequestHandlerAfterCurrent( | |
handler); | |
} | |
/** | |
* Override this method for a file name which will let the browser prompt | |
* with a save/open dialog. | |
* | |
* @see ResourceStreamRequestTarget#getFileName() | |
*/ | |
protected String getFileName() { | |
return this.fileName; | |
} | |
public void setFileName(String fileName) { | |
this.fileName = fileName; | |
} | |
/** | |
* Hook method providing the actual resource stream. | |
*/ | |
protected IResourceStream getResourceStream() { | |
return resourceStream; | |
} | |
public void setResourceStream(IResourceStream resourceStream) { | |
this.resourceStream = resourceStream; | |
} | |
} |