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.util.regex.Matcher;
19 import java.util.regex.Pattern;
20
21 /**
22 * Grabs a hidden field's value from a HTML page.
23 */
24 public final class Grabber
25 {
26 // ********************************* Fields *********************************
27
28 // --- constants ------------------------------------------------------------
29
30 /**
31 * The precompiled pattern to exactly match the hidden input field on a
32 * Bugzilla page that contains the token information.
33 */
34 private static final Pattern TOKEN_PATTERN = Pattern.compile(
35 "<input\\s+type=\"hidden\"\\s+name=\"token\"\\s+value=\"([^\"]+)\"",
36 Pattern.MULTILINE);
37
38 /**
39 * The precompiled pattern to exactly match the title tag of a page.
40 */
41 private static final Pattern TITLE_PATTERN = Pattern.compile(
42 "<title>\\s*([^<]+)\\s*</title>", Pattern.MULTILINE);
43
44 // --- members --------------------------------------------------------------
45
46 /**
47 * The Bugzilla page to grab from.
48 */
49 private final String page;
50
51 // ****************************** Initializer *******************************
52
53 // ****************************** Constructors ******************************
54
55 /**
56 * Default constructor.
57 *
58 * @param page the Bugzilla page to grab from.
59 */
60 public Grabber(final String page)
61 {
62 this.page = page;
63 }
64
65 // ****************************** Inner Classes *****************************
66
67 // ********************************* Methods ********************************
68
69 // --- init -----------------------------------------------------------------
70
71 // --- get&set --------------------------------------------------------------
72
73 // --- business -------------------------------------------------------------
74
75 /**
76 * Grabs the token.
77 *
78 * @return the token or <code>null</code>, if not present on the page.
79 */
80 public String grabToken()
81 {
82 final Matcher matcher = TOKEN_PATTERN.matcher(page);
83 final boolean found = matcher.find();
84 if (found)
85 {
86 final String token = matcher.group(1);
87 return token;
88 }
89 return null;
90 }
91
92 /**
93 * Grabs the title of a pahe.
94 *
95 * @return the title or <code>null</code>, if not present on the page.
96 */
97 public String grabTitle()
98 {
99 final Matcher matcher = TITLE_PATTERN.matcher(page);
100 final boolean found = matcher.find();
101 if (found)
102 {
103 final String title = matcher.group(1);
104 return title;
105 }
106 return null;
107 }
108
109 // --- object basics --------------------------------------------------------
110
111 }