com.facebook.presto.jdbc.internal.apache.http.protocol.ResponseServer Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* 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
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
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* .
*
*/
package com.facebook.presto.jdbc.internal.apache.http.protocol;
import java.io.IOException;
import com.facebook.presto.jdbc.internal.apache.http.HttpException;
import com.facebook.presto.jdbc.internal.apache.http.HttpResponse;
import com.facebook.presto.jdbc.internal.apache.http.HttpResponseInterceptor;
import com.facebook.presto.jdbc.internal.apache.http.annotation.ThreadingBehavior;
import com.facebook.presto.jdbc.internal.apache.http.annotation.Contract;
import com.facebook.presto.jdbc.internal.apache.http.util.Args;
/**
* ResponseServer is responsible for adding {@code Server} header. This
* interceptor is recommended for server side protocol processors.
*
* @since 4.0
*/
@Contract(threading = ThreadingBehavior.IMMUTABLE)
public class ResponseServer implements HttpResponseInterceptor {
private final String originServer;
/**
* @since 4.3
*/
public ResponseServer(final String originServer) {
super();
this.originServer = originServer;
}
public ResponseServer() {
this(null);
}
@Override
public void process(final HttpResponse response, final HttpContext context)
throws HttpException, IOException {
Args.notNull(response, "HTTP response");
if (!response.containsHeader(HTTP.SERVER_HEADER)) {
if (this.originServer != null) {
response.addHeader(HTTP.SERVER_HEADER, this.originServer);
}
}
}
}
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