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1 | <?php |
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2 | |
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3 | /** |
4 | * url_parser.php |
5 | * Copyright (c) 1999-2001 The Squirrelmail Development Team |
6 | * Licensed under the GNU GPL. For full terms see the file COPYING. |
7 | * |
8 | * This code provides various string manipulation functions that are |
9 | * used by the rest of the Squirrelmail code. |
10 | * |
11 | * $Id$ |
12 | */ |
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13 | |
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14 | function replaceBlock (&$in, $replace, $start, $end) { |
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15 | $begin = substr($in,0,$start); |
16 | $end = substr($in,$end,strlen($in)-$end); |
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17 | $in = $begin.$replace.$end; |
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18 | } |
19 | |
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20 | // Having this defined in just one spot could help when changes need |
21 | // to be made to the pattern |
22 | // Make sure that the expression is evaluated case insensitively |
23 | // |
24 | // Here's pretty sophisticated IP matching: |
25 | // $IPMatch = '(2[0-5][0-9]|1?[0-9]{1,2})'; |
26 | // $IPMatch = '\[?' . $IPMatch . '(\.' . $IPMatch . '){3}\]?'; |
27 | // |
28 | // Here's enough: |
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29 | global $IP_RegExp_Match, $Host_RegExp_Match, $Email_RegExp_Match; |
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30 | $IP_RegExp_Match = '\\[?[0-9]{1,3}(\\.[0-9]{1,3}){3}\\]?'; |
31 | $Host_RegExp_Match = '(' . $IP_RegExp_Match . |
32 | '|[0-9a-z]([-.]?[0-9a-z])*\\.[a-z][a-z]+)'; |
33 | $Email_RegExp_Match = '[0-9a-z]([-_.]?[0-9a-z])*(%' . $Host_RegExp_Match . |
34 | ')?@' . $Host_RegExp_Match; |
35 | |
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36 | function parseEmail (&$body) { |
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37 | global $color, $Email_RegExp_Match; |
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38 | $Size = strlen($body); |
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39 | |
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40 | /* |
41 | This is here in case we ever decide to use highlighting of searched |
42 | text. this does it for email addresses |
43 | |
44 | if ($what && ($where == "BODY" || $where == "TEXT")) { |
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45 | eregi ($Email_RegExp_Match, $body, $regs); |
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46 | $oldaddr = $regs[0]; |
47 | if ($oldaddr) { |
48 | $newaddr = eregi_replace ($what, "<b><font color=\"$color[2]\">$what</font></font></b>", $oldaddr); |
49 | $body = str_replace ($oldaddr, "<a href=\"../src/compose.php?send_to=$oldaddr\">$newaddr</a>", $body); |
50 | } |
51 | } else { |
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52 | $body = eregi_replace ($Email_RegExp_Match, "<a href=\"../src/compose.php?send_to=\\0\">\\0</a>", $body); |
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53 | } |
54 | */ |
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55 | |
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56 | $body = eregi_replace ($Email_RegExp_Match, "<a href=\"../src/compose.php?send_to=\\0\">\\0</a>", $body); |
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57 | |
58 | // If there are any changes, it'll just get bigger. |
59 | if ($Size != strlen($body)) |
60 | return 1; |
61 | return 0; |
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62 | } |
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63 | |
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64 | |
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65 | // We don't want to re-initialize this stuff for every line. Save work |
66 | // and just do it once here. |
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67 | global $url_parser_url_tokens; |
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68 | $url_parser_url_tokens = array( |
69 | 'http://', |
70 | 'https://', |
71 | 'ftp://', |
72 | 'telnet:', // Special case -- doesn't need the slashes |
73 | 'gopher://', |
74 | 'news://'); |
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75 | |
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76 | global $url_parser_poss_ends; |
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77 | $url_parser_poss_ends = array(' ', "\n", "\r", '<', '>', ".\r", ".\n", |
78 | '. ', ' ', ')', '(', '"', '<', '>', '.<', |
79 | ']', '[', '{', '}', "\240"); |
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80 | |
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81 | |
82 | function parseUrl (&$body) |
83 | { |
84 | global $url_parser_poss_ends, $url_parser_url_tokens;; |
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85 | $start = 0; |
86 | $target_pos = strlen($body); |
87 | |
88 | while ($start != $target_pos) |
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89 | { |
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90 | $target_token = ''; |
91 | |
92 | // Find the first token to replace |
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93 | foreach ($url_parser_url_tokens as $the_token) |
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94 | { |
95 | $pos = strpos(strtolower($body), $the_token, $start); |
96 | if (is_int($pos) && $pos < $target_pos) |
97 | { |
98 | $target_pos = $pos; |
99 | $target_token = $the_token; |
100 | } |
101 | } |
102 | |
103 | // Look for email addresses between $start and $target_pos |
104 | $check_str = substr($body, $start, $target_pos); |
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105 | |
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106 | if (parseEmail($check_str)) |
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107 | { |
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108 | replaceBlock($body, $check_str, $start, $target_pos); |
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109 | $target_pos = strlen($check_str) + $start; |
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110 | } |
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111 | |
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112 | // If there was a token to replace, replace it |
113 | if ($target_token != '') |
114 | { |
115 | // Find the end of the URL |
116 | $end=strlen($body); |
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117 | foreach ($url_parser_poss_ends as $key => $val) |
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118 | { |
119 | $enda = strpos($body,$val,$target_pos); |
120 | if (is_int($enda) && $enda < $end) |
121 | $end = $enda; |
122 | } |
123 | |
124 | // Extract URL |
125 | $url = substr($body, $target_pos, $end-$target_pos); |
126 | |
127 | // Replace URL with HyperLinked Url, requires 1 char in link |
128 | if ($url != '' && $url != $target_token) |
129 | { |
130 | $url_str = "<a href=\"$url\" target=\"_blank\">$url</a>"; |
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131 | replaceBlock($body,$url_str,$target_pos,$end); |
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132 | $target_pos += strlen($url_str); |
133 | } |
134 | else |
135 | { |
136 | // Not quite a valid link, skip ahead to next chance |
137 | $target_pos += strlen($target_token); |
138 | } |
139 | } |
140 | |
141 | // Move forward |
142 | $start = $target_pos; |
143 | $target_pos = strlen($body); |
144 | } |
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145 | } |
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146 | |
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147 | ?> |