org.restexpress.response.StringBufferHttpResponseWriter.java Source code

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Here is the source code for org.restexpress.response.StringBufferHttpResponseWriter.java

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/*
Copyright 2011, Strategic Gains, Inc.
    
   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.restexpress.response;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import org.restexpress.ContentType;
import org.restexpress.Request;
import org.restexpress.Response;

/**
 * @author toddf
 * @since Feb 10, 2011
 */
public class StringBufferHttpResponseWriter implements HttpResponseWriter {
    private Map<String, List<String>> headers;
    private StringBuffer body;

    public StringBufferHttpResponseWriter(StringBuffer buffer) {
        this(null, buffer);
    }

    public StringBufferHttpResponseWriter(Map<String, List<String>> headers, StringBuffer buffer) {
        super();
        this.body = buffer;
        this.headers = headers;
    }

    @Override
    public void write(ChannelHandlerContext ctx, Request request, Response response) {
        if (headers != null) {
            for (String headerName : response.getHeaderNames()) {
                List<String> headerValues = new ArrayList<String>(response.getHeaders(headerName));
                headers.put(headerName, headerValues);
            }
        }

        if (response.getBody() == null) {
            body.append("null");
            return;
        }

        if (ByteBuf.class.isAssignableFrom(response.getBody().getClass())) {
            ByteBuf buf = (ByteBuf) response.getBody();
            body.append(buf.toString(ContentType.CHARSET));
            return;
        }

        body.append(response.getBody());
    }
}