/*
* Copyright 2009 Prime Technology.
*
* 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 org.primefaces.component.fileupload;
import java.io.IOException;
import javax.faces.FacesException;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.servlet.ServletRequestWrapper;
import org.apache.commons.fileupload.FileItem;
import org.primefaces.event.FileUploadEvent;
import org.primefaces.model.DefaultUploadedFile;
import org.primefaces.model.UploadedFile;
import org.primefaces.renderkit.CoreRenderer;
import org.primefaces.resource.ResourceUtils;
import org.primefaces.util.ComponentUtils;
import org.primefaces.webapp.MultipartRequest;
public class FileUploadRenderer extends CoreRenderer {
public void decode(FacesContext facesContext, UIComponent component) {
FileUpload fileUpload = (FileUpload) component;
String clientId = fileUpload.getClientId(facesContext);
MultipartRequest multipartRequest = getMultiPartRequestInChain(facesContext);
if(multipartRequest != null) {
FileItem file = multipartRequest.getFileItem(clientId);
if(file != null) {
UploadedFile uploadedFile = new DefaultUploadedFile(file);
fileUpload.queueEvent(new FileUploadEvent(fileUpload, uploadedFile));
}
}
}
/**
* Finds our MultipartRequestServletWrapper in case application contains other RequestWrappers
*/
private MultipartRequest getMultiPartRequestInChain(FacesContext facesContext) {
Object request = facesContext.getExternalContext().getRequest();
while(request instanceof ServletRequestWrapper) {
if(request instanceof MultipartRequest) {
return (MultipartRequest) request;
}
else {
request = ((ServletRequestWrapper) request).getRequest();
}
}
return null;
}
public void encodeEnd(FacesContext facesContext, UIComponent component) throws IOException {
FileUpload fileUpload = (FileUpload) component;
encodeScript(facesContext, fileUpload);
encodeMarkup(facesContext, fileUpload);
}
private void encodeScript(FacesContext facesContext, FileUpload fileUpload) throws IOException {
ResponseWriter writer = facesContext.getResponseWriter();
String clientId = fileUpload.getClientId(facesContext);
String actionURL = getActionURL(facesContext);
String uploadVar = createUniqueWidgetVar(facesContext, fileUpload);
String cancelImg = fileUpload.getCancelImage() == null ? ResourceUtils.getResourceURL(facesContext, "/jquery/plugins/uploadify/cancel.png") : getResourceURL(facesContext, fileUpload.getCancelImage());
UIComponent parentForm = ComponentUtils.findParentForm(facesContext, fileUpload);
if(parentForm == null) {
throw new FacesException("FileUpload component:" + clientId + " needs to be enclosed in a form");
}
String formClientId = parentForm.getClientId(facesContext);
writer.startElement("script", null);
writer.writeAttribute("type", "text/javascript", null);
writer.write("PrimeFaces.onContentReady('" + clientId + "', function () { \n");
writer.write(uploadVar + " = new PrimeFaces.widget.Uploader('" + clientId + "', {\n");
writer.write("uploader:'" + ResourceUtils.getResourceURL(facesContext, "/jquery/plugins/uploadify/uploadify.swf") + "'");
writer.write(",script:'" + actionURL + "'");
writer.write(",cancelImg:'" + cancelImg + "'");
writer.write(",formId:'" + formClientId + "'");
writer.write(",fileDataName:'" + clientId + "'");
writer.write(",multi:" + fileUpload.isMultiple());
writer.write(",auto:" + fileUpload.isAuto());
if(fileUpload.getUpdate() != null) writer.write(",update:'" + fileUpload.getUpdate() + "'");
if(fileUpload.getImage() != null) writer.write(",buttonImg:'" + getResourceURL(facesContext, fileUpload.getImage()) + "'");
if(fileUpload.getLabel() != null) writer.write(",buttonText:'" + fileUpload.getLabel() + "'");
if(fileUpload.getWidth() != null) writer.write(",width:'" + fileUpload.getWidth() + "'");
if(fileUpload.getHeight() != null) writer.write(",height:'" + fileUpload.getWidth() + "'");
if(fileUpload.getAllowTypes() != null) writer.write(",fileExt:'" + fileUpload.getAllowTypes() + "'");
if(fileUpload.getDescription() != null) writer.write(",fileDesc:'" + fileUpload.getDescription() + "'");
if(shouldRenderAttribute(fileUpload.getSizeLimit())) writer.write(",sizeLimit:" + fileUpload.getSizeLimit());
if(fileUpload.getWmode() != null) writer.write(",wmode:'" + fileUpload.getWmode() + "'");
writer.write("});\n});\n");
writer.endElement("script");
}
private void encodeMarkup(FacesContext facesContext, FileUpload fileUpload) throws IOException {
ResponseWriter writer = facesContext.getResponseWriter();
String clientId = fileUpload.getClientId(facesContext);
String uploadVar = createUniqueWidgetVar(facesContext, fileUpload);
writer.startElement("input", null);
writer.writeAttribute("type", "file", null);
writer.writeAttribute("id", clientId, null);
writer.writeAttribute("name", clientId, null);
writer.endElement("input");
if(!fileUpload.isCustomUI() && !fileUpload.isAuto()) {
writer.startElement("a", null);
writer.writeAttribute("href", "javascript:" + uploadVar + ".upload();", null);
writer.write("Upload");
writer.endElement("a");
writer.write(" | ");
writer.startElement("a", null);
writer.writeAttribute("href", "javascript:" + uploadVar + ".clear();", null);
writer.write("Clear");
writer.endElement("a");
}
}
}