1 /* 2 * ==================================================================== 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * ==================================================================== 20 * 21 * This software consists of voluntary contributions made by many 22 * individuals on behalf of the Apache Software Foundation. For more 23 * information on the Apache Software Foundation, please see 24 * <http://www.apache.org/>. 25 * 26 */ 27 28 package org.apache.http; 29 30 /** 31 * Represents an HTTP header field. 32 * 33 * <p>The HTTP header fields follow the same generic format as 34 * that given in Section 3.1 of RFC 822. Each header field consists 35 * of a name followed by a colon (":") and the field value. Field names 36 * are case-insensitive. The field value MAY be preceded by any amount 37 * of LWS, though a single SP is preferred. 38 * 39 *<pre> 40 * message-header = field-name ":" [ field-value ] 41 * field-name = token 42 * field-value = *( field-content | LWS ) 43 * field-content = <the OCTETs making up the field-value 44 * and consisting of either *TEXT or combinations 45 * of token, separators, and quoted-string> 46 *</pre> 47 * 48 * @since 4.0 49 */ 50 public interface Header extends NameValuePair { 51 52 /** 53 * Parses the value. 54 * 55 * @return an array of {@link HeaderElement} entries, may be empty, but is never {@code null} 56 * @throws ParseException in case of a parsing error 57 */ 58 HeaderElement[] getElements() throws ParseException; 59 60 }