001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 * 019 */ 020 021package org.apache.mina.http.api; 022 023import java.util.Map; 024 025/** 026 * An HTTP message, the ancestor of HTTP request & response. 027 * 028 * @author The Apache MINA Project (dev@mina.apache.org) 029 */ 030public interface HttpMessage { 031 032 /** 033 * The HTTP version of the message 034 * 035 * @return HTTP/1.0 or HTTP/1.1 036 */ 037 HttpVersion getProtocolVersion(); 038 039 /** 040 * Gets the <tt>Content-Type</tt> header of the message. 041 * 042 * @return The content type. 043 */ 044 String getContentType(); 045 046 /** 047 * @return <tt>true</tt> if this message enables keep-alive connection. 048 */ 049 boolean isKeepAlive(); 050 051 /** 052 * Returns the value of the HTTP header with the specified name. If more than one header with the given name is 053 * associated with this request, one is selected and returned. 054 * 055 * @param name The name of the desired header 056 * @return The header value - or null if no header is found with the specified name 057 */ 058 String getHeader(String name); 059 060 /** 061 * @param name the Header's name we are looking for 062 * @return <tt>true</tt> if the HTTP header with the specified name exists in this request. 063 */ 064 boolean containsHeader(String name); 065 066 /** 067 * @return a read-only {@link Map} of HTTP headers whose key is a {@link String} and whose value is a {@link String} 068 * s. 069 */ 070 Map<String, String> getHeaders(); 071}