1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.voicemail.impl.mail.store.imap;
import com.android.voicemail.impl.mail.utils.LogUtils;
import java.util.ArrayList;
/** Utility methods for use with IMAP. */
public class ImapUtility {
public static final String TAG = "ImapUtility";
/**
* Apply quoting rules per IMAP RFC, quoted = DQUOTE *QUOTED-CHAR DQUOTE QUOTED-CHAR = <any
* TEXT-CHAR except quoted-specials> / "\" quoted-specials quoted-specials = DQUOTE / "\"
*
* <p>This is used primarily for IMAP login, but might be useful elsewhere.
*
* <p>NOTE: Not very efficient - you may wish to preflight this, or perhaps it should check for
* trouble chars before calling the replace functions.
*
* @param s The string to be quoted.
* @return A copy of the string, having undergone quoting as described above
*/
public static String imapQuoted(String s) {
// First, quote any backslashes by replacing \ with \\
// regex Pattern: \\ (Java string const = \\\\)
// Substitute: \\\\ (Java string const = \\\\\\\\)
String result = s.replaceAll("\\\\", "\\\\\\\\");
// Then, quote any double-quotes by replacing " with \"
// regex Pattern: " (Java string const = \")
// Substitute: \\" (Java string const = \\\\\")
result = result.replaceAll("\"", "\\\\\"");
// return string with quotes around it
return "\"" + result + "\"";
}
/**
* Gets all of the values in a sequence set per RFC 3501. Any ranges are expanded into a list of
* individual numbers. If the set is invalid, an empty array is returned.
*
* <pre>
* sequence-number = nz-number / "*"
* sequence-range = sequence-number ":" sequence-number
* sequence-set = (sequence-number / sequence-range) *("," sequence-set)
* </pre>
*/
public static String[] getImapSequenceValues(String set) {
ArrayList<String> list = new ArrayList<String>();
if (set != null) {
String[] setItems = set.split(",");
for (String item : setItems) {
if (item.indexOf(':') == -1) {
// simple item
try {
Integer.parseInt(item); // Don't need the value; just ensure it's valid
list.add(item);
} catch (NumberFormatException e) {
LogUtils.d(TAG, "Invalid UID value", e);
}
} else {
// range
for (String rangeItem : getImapRangeValues(item)) {
list.add(rangeItem);
}
}
}
}
String[] stringList = new String[list.size()];
return list.toArray(stringList);
}
/**
* Expand the given number range into a list of individual numbers. If the range is not valid, an
* empty array is returned.
*
* <pre>
* sequence-number = nz-number / "*"
* sequence-range = sequence-number ":" sequence-number
* sequence-set = (sequence-number / sequence-range) *("," sequence-set)
* </pre>
*/
public static String[] getImapRangeValues(String range) {
ArrayList<String> list = new ArrayList<String>();
try {
if (range != null) {
int colonPos = range.indexOf(':');
if (colonPos > 0) {
int first = Integer.parseInt(range.substring(0, colonPos));
int second = Integer.parseInt(range.substring(colonPos + 1));
if (first < second) {
for (int i = first; i <= second; i++) {
list.add(Integer.toString(i));
}
} else {
for (int i = first; i >= second; i--) {
list.add(Integer.toString(i));
}
}
}
}
} catch (NumberFormatException e) {
LogUtils.d(TAG, "Invalid range value", e);
}
String[] stringList = new String[list.size()];
return list.toArray(stringList);
}
}
|