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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  package org.apache.http.client.entity;
28  
29  import java.io.UnsupportedEncodingException;
30  import java.nio.charset.Charset;
31  import java.util.List;
32  
33  import org.apache.http.NameValuePair;
34  import org.apache.http.client.utils.URLEncodedUtils;
35  import org.apache.http.entity.ContentType;
36  import org.apache.http.entity.StringEntity;
37  import org.apache.http.protocol.HTTP;
38  
39  /**
40   * An entity composed of a list of url-encoded pairs.
41   * This is typically useful while sending an HTTP POST request.
42   *
43   * @since 4.0
44   */
45  public class UrlEncodedFormEntity extends StringEntity {
46  
47      /**
48       * Constructs a new {@link UrlEncodedFormEntity} with the list
49       * of parameters in the specified encoding.
50       *
51       * @param parameters list of name/value pairs
52       * @param charset encoding the name/value pairs be encoded with
53       * @throws UnsupportedEncodingException if the encoding isn't supported
54       */
55      public UrlEncodedFormEntity (
56          final List <? extends NameValuePair> parameters,
57          final String charset) throws UnsupportedEncodingException {
58          super(URLEncodedUtils.format(parameters,
59                  charset != null ? charset : HTTP.DEF_CONTENT_CHARSET.name()),
60                  ContentType.create(URLEncodedUtils.CONTENT_TYPE, charset));
61      }
62  
63      /**
64       * Constructs a new {@link UrlEncodedFormEntity} with the list
65       * of parameters in the specified encoding.
66       *
67       * @param parameters iterable collection of name/value pairs
68       * @param charset encoding the name/value pairs be encoded with
69       *
70       * @since 4.2
71       */
72      public UrlEncodedFormEntity (
73          final Iterable <? extends NameValuePair> parameters,
74          final Charset charset) {
75          super(URLEncodedUtils.format(parameters,
76                  charset != null ? charset : HTTP.DEF_CONTENT_CHARSET),
77                  ContentType.create(URLEncodedUtils.CONTENT_TYPE, charset));
78      }
79  
80      /**
81       * Constructs a new {@link UrlEncodedFormEntity} with the list
82       * of parameters with the default encoding of {@link HTTP#DEFAULT_CONTENT_CHARSET}
83       *
84       * @param parameters list of name/value pairs
85       * @throws UnsupportedEncodingException if the default encoding isn't supported
86       */
87      public UrlEncodedFormEntity (
88          final List <? extends NameValuePair> parameters) throws UnsupportedEncodingException {
89          this(parameters, (Charset) null);
90      }
91  
92      /**
93       * Constructs a new {@link UrlEncodedFormEntity} with the list
94       * of parameters with the default encoding of {@link HTTP#DEFAULT_CONTENT_CHARSET}
95       *
96       * @param parameters iterable collection of name/value pairs
97       *
98       * @since 4.2
99       */
100     public UrlEncodedFormEntity (
101         final Iterable <? extends NameValuePair> parameters) {
102         this(parameters, null);
103     }
104 
105 }