1 /*
2 * Copyright 2012 smartics, Kronseder & Reiner GmbH
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package de.smartics.maven.issue.util;
17
18 import java.io.IOException;
19 import java.io.InputStream;
20
21 import org.apache.commons.httpclient.Header;
22 import org.apache.commons.httpclient.HttpMethod;
23 import org.apache.commons.io.IOUtils;
24 import org.xml.sax.InputSource;
25
26 import de.smartics.maven.issue.command.CommandException;
27
28 /**
29 * Utilities for the HTTP client API.
30 */
31 public final class HttpClientUtils
32 {
33 // ********************************* Fields *********************************
34
35 // --- constants ------------------------------------------------------------
36
37 // --- members --------------------------------------------------------------
38
39 // ****************************** Initializer *******************************
40
41 // ****************************** Constructors ******************************
42
43 /**
44 * Utility class pattern.
45 */
46 private HttpClientUtils()
47 {
48 }
49
50 // ****************************** Inner Classes *****************************
51
52 // ********************************* Methods ********************************
53
54 // --- init -----------------------------------------------------------------
55
56 // --- get&set --------------------------------------------------------------
57
58 // --- business -------------------------------------------------------------
59
60 /**
61 * Returns the body response using the correct encoding.
62 *
63 * @param method the method returned to read from.
64 * @return the body content.
65 */
66 public static String readBodyContent(final HttpMethod method)
67 {
68 InputStream input = null;
69 try
70 {
71 input = method.getResponseBodyAsStream();
72 final String encoding = getEncoding(method);
73 final String content = IOUtils.toString(input, encoding);
74 return content;
75 }
76 catch (final IOException e)
77 {
78 throw new CommandException("Problems reading respose.", e);
79 }
80 finally
81 {
82 IOUtils.closeQuietly(input);
83 }
84 }
85
86 /**
87 * Returns the body response using the correct encoding.
88 *
89 * @param method the method returned to read from.
90 * @return the body content.
91 */
92 public static InputSource readBodyContentAsStream(final HttpMethod method)
93 {
94 InputStream input = null;
95 try
96 {
97 input = method.getResponseBodyAsStream();
98 final String encoding = getEncoding(method);
99 final InputSource source = new InputSource(input);
100 source.setEncoding(encoding);
101 return source;
102 }
103 catch (final IOException e)
104 {
105 throw new CommandException("Problems reading respose.", e);
106 }
107 }
108
109 private static String getEncoding(final HttpMethod method)
110 {
111 final Header header = method.getResponseHeader("Content-Type");
112 if (header != null)
113 {
114 final String pattern = "; charset=";
115 final String value = header.getValue();
116 final int delimiterIndex = value.lastIndexOf(pattern);
117 if (delimiterIndex != -1)
118 {
119 final int start = delimiterIndex + pattern.length();
120 if (start < value.length() - 1) // NOPMD
121 {
122 final String encoding = value.substring(start).trim();
123 return encoding;
124 }
125 }
126 }
127 return null;
128 }
129
130 // --- object basics --------------------------------------------------------
131
132 }