1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 package org.apache.commons.fileupload; 18 19 import java.util.Iterator; 20 21 /** 22 * <p> This class provides support for accessing the headers for a file or form 23 * item that was received within a <code>multipart/form-data</code> POST 24 * request.</p> 25 * 26 * @since 1.2.1 27 */ 28 public interface FileItemHeaders { 29 30 /** 31 * Returns the value of the specified part header as a <code>String</code>. 32 * 33 * If the part did not include a header of the specified name, this method 34 * return <code>null</code>. If there are multiple headers with the same 35 * name, this method returns the first header in the item. The header 36 * name is case insensitive. 37 * 38 * @param name a <code>String</code> specifying the header name 39 * @return a <code>String</code> containing the value of the requested 40 * header, or <code>null</code> if the item does not have a header 41 * of that name 42 */ 43 String getHeader(String name); 44 45 /** 46 * <p> 47 * Returns all the values of the specified item header as an 48 * <code>Iterator</code> of <code>String</code> objects. 49 * </p> 50 * <p> 51 * If the item did not include any headers of the specified name, this 52 * method returns an empty <code>Iterator</code>. The header name is 53 * case insensitive. 54 * </p> 55 * 56 * @param name a <code>String</code> specifying the header name 57 * @return an <code>Iterator</code> containing the values of the 58 * requested header. If the item does not have any headers of 59 * that name, return an empty <code>Iterator</code> 60 */ 61 Iterator<String> getHeaders(String name); 62 63 /** 64 * <p> 65 * Returns an <code>Iterator</code> of all the header names. 66 * </p> 67 * 68 * @return an <code>Iterator</code> containing all of the names of 69 * headers provided with this file item. If the item does not have 70 * any headers return an empty <code>Iterator</code> 71 */ 72 Iterator<String> getHeaderNames(); 73 74 }