/*
* ====================================================================
* 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.http.protocol;
import java.io.IOException;
import org.apache.http.HttpEntityEnclosingRequest;
import org.apache.http.HttpException;
import org.apache.http.HttpRequest;
import org.apache.http.HttpRequestInterceptor;
import org.apache.http.annotation.ThreadSafe;
import org.apache.http.util.Args;
/**
* RequestDate interceptor is responsible for adding {@code Date} header
* to the outgoing requests This interceptor is optional for client side
* protocol processors.
*
* @since 4.0
*/
@ThreadSafe
public class RequestDate implements HttpRequestInterceptor {
private static final HttpDateGenerator DATE_GENERATOR = new HttpDateGenerator();
public RequestDate() {
super();
}
@Override
public void process(final HttpRequest request, final HttpContext context)
throws HttpException, IOException {
Args.notNull(request, "HTTP request");
if ((request instanceof HttpEntityEnclosingRequest) &&
!request.containsHeader(HTTP.DATE_HEADER)) {
final String httpdate = DATE_GENERATOR.getCurrentDate();
request.setHeader(HTTP.DATE_HEADER, httpdate);
}
}
}