org.primefaces.application.resource.QRCodeHandler Maven / Gradle / Ivy
/*
* Copyright 2009-2014 PrimeTek.
*
* 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.application.resource;
import java.io.IOException;
import java.util.Map;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import net.glxn.qrgen.QRCode;
import net.glxn.qrgen.image.ImageType;
import org.primefaces.context.RequestContext;
import org.primefaces.util.Constants;
import org.primefaces.util.StringEncrypter;
public class QRCodeHandler extends BaseDynamicContentHandler {
public void handle(FacesContext context) throws IOException {
Map params = context.getExternalContext().getRequestParameterMap();
String encryptedValue = (String) params.get(Constants.DYNAMIC_CONTENT_PARAM);
if(encryptedValue != null) {
boolean cache = Boolean.valueOf(params.get(Constants.DYNAMIC_CONTENT_CACHE_PARAM));
StringEncrypter strEn = RequestContext.getCurrentInstance().getEncrypter();
String value = strEn.decrypt(encryptedValue);
ExternalContext externalContext = context.getExternalContext();
externalContext.setResponseStatus(200);
externalContext.setResponseContentType("image/png");
handleCache(externalContext, cache);
QRCode.from(value).to(ImageType.PNG).withCharset("UTF-8").writeTo(externalContext.getResponseOutputStream());
externalContext.responseFlushBuffer();
context.responseComplete();
}
}
}