com.facebook.presto.jdbc.internal.apache.http.protocol.ResponseDate Maven / Gradle / Ivy
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* distributed with this work for additional information
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* 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
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* http://www.apache.org/licenses/LICENSE-2.0
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
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*
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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.HttpStatus;
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;
/**
* ResponseDate is responsible for adding {@code Date} header to the
* outgoing responses. This interceptor is recommended for server side protocol
* processors.
*
* @since 4.0
*/
@Contract(threading = ThreadingBehavior.SAFE)
public class ResponseDate implements HttpResponseInterceptor {
private static final HttpDateGenerator DATE_GENERATOR = new HttpDateGenerator();
public ResponseDate() {
super();
}
@Override
public void process(final HttpResponse response, final HttpContext context)
throws HttpException, IOException {
Args.notNull(response, "HTTP response");
final int status = response.getStatusLine().getStatusCode();
if ((status >= HttpStatus.SC_OK) &&
!response.containsHeader(HTTP.DATE_HEADER)) {
final String httpdate = DATE_GENERATOR.getCurrentDate();
response.setHeader(HTTP.DATE_HEADER, httpdate);
}
}
}
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