/**
* 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.cxf.jaxrs.provider.jsonp;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.ext.WriterInterceptor;
import javax.ws.rs.ext.WriterInterceptorContext;
import org.apache.cxf.common.util.StringUtils;
import org.apache.cxf.jaxrs.utils.JAXRSUtils;
import org.apache.cxf.message.Exchange;
import org.apache.cxf.message.Message;
/**
* Appends the jsonp callback to json responses when the '_jsonp' parameter has been set in the querystring.
*/
public class JsonpJaxrsWriterInterceptor implements WriterInterceptor {
private String mediaType = JsonpInInterceptor.JSONP_TYPE;
private String paddingEnd = "(";
public JsonpJaxrsWriterInterceptor() {
}
@Override
public void aroundWriteTo(WriterInterceptorContext context) throws IOException, WebApplicationException {
String callback = getCallbackValue(JAXRSUtils.getCurrentMessage());
if (!StringUtils.isEmpty(callback)) {
context.getHeaders().putSingle(Message.CONTENT_TYPE,
JAXRSUtils.toMediaType(getMediaType()));
context.getOutputStream().write((callback + getPaddingEnd()).getBytes(StandardCharsets.UTF_8));
}
context.proceed();
}
public void setMediaType(String mediaType) {
this.mediaType = mediaType;
}
public String getMediaType() {
return mediaType;
}
public void setPaddingEnd(String paddingEnd) {
this.paddingEnd = paddingEnd;
}
public String getPaddingEnd() {
return paddingEnd;
}
protected String getCallbackValue(Message message) {
Exchange exchange = message.getExchange();
return (String) exchange.get(JsonpInInterceptor.CALLBACK_KEY);
}
}