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1 | <?php |
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2 | |
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3 | /** |
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4 | ** url_parser.php |
5 | ** |
6 | ** Copyright (c) 1999-2001 The Squirrelmail Development Team |
7 | ** Licensed under the GNU GPL. For full terms see the file COPYING. |
8 | ** |
9 | ** This code provides various string manipulation functions that are |
10 | ** used by the rest of the Squirrelmail code. |
11 | ** |
12 | ** $Id$ |
13 | **/ |
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14 | |
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15 | function replaceBlock (&$in, $replace, $start, $end) { |
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16 | $begin = substr($in,0,$start); |
17 | $end = substr($in,$end,strlen($in)-$end); |
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18 | $in = $begin.$replace.$end; |
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19 | } |
20 | |
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21 | // Having this defined in just one spot could help when changes need |
22 | // to be made to the pattern |
23 | // Make sure that the expression is evaluated case insensitively |
24 | // |
25 | // Here's pretty sophisticated IP matching: |
26 | // $IPMatch = '(2[0-5][0-9]|1?[0-9]{1,2})'; |
27 | // $IPMatch = '\[?' . $IPMatch . '(\.' . $IPMatch . '){3}\]?'; |
28 | // |
29 | // Here's enough: |
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30 | global $IP_RegExp_Match, $Host_RegExp_Match, $Email_RegExp_Match; |
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31 | $IP_RegExp_Match = '\\[?[0-9]{1,3}(\\.[0-9]{1,3}){3}\\]?'; |
32 | $Host_RegExp_Match = '(' . $IP_RegExp_Match . |
33 | '|[0-9a-z]([-.]?[0-9a-z])*\\.[a-z][a-z]+)'; |
34 | $Email_RegExp_Match = '[0-9a-z]([-_.]?[0-9a-z])*(%' . $Host_RegExp_Match . |
35 | ')?@' . $Host_RegExp_Match; |
36 | |
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37 | function parseEmail (&$body) { |
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38 | global $color, $Email_RegExp_Match; |
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39 | $Size = strlen($body); |
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40 | |
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41 | /* |
42 | This is here in case we ever decide to use highlighting of searched |
43 | text. this does it for email addresses |
44 | |
45 | if ($what && ($where == "BODY" || $where == "TEXT")) { |
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46 | eregi ($Email_RegExp_Match, $body, $regs); |
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47 | $oldaddr = $regs[0]; |
48 | if ($oldaddr) { |
49 | $newaddr = eregi_replace ($what, "<b><font color=\"$color[2]\">$what</font></font></b>", $oldaddr); |
50 | $body = str_replace ($oldaddr, "<a href=\"../src/compose.php?send_to=$oldaddr\">$newaddr</a>", $body); |
51 | } |
52 | } else { |
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53 | $body = eregi_replace ($Email_RegExp_Match, "<a href=\"../src/compose.php?send_to=\\0\">\\0</a>", $body); |
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54 | } |
55 | */ |
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56 | |
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57 | $body = eregi_replace ($Email_RegExp_Match, "<a href=\"../src/compose.php?send_to=\\0\">\\0</a>", $body); |
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58 | |
59 | // If there are any changes, it'll just get bigger. |
60 | if ($Size != strlen($body)) |
61 | return 1; |
62 | return 0; |
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63 | } |
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64 | |
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65 | |
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66 | // We don't want to re-initialize this stuff for every line. Save work |
67 | // and just do it once here. |
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68 | global $url_parser_url_tokens; |
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69 | $url_parser_url_tokens = array( |
70 | 'http://', |
71 | 'https://', |
72 | 'ftp://', |
73 | 'telnet:', // Special case -- doesn't need the slashes |
74 | 'gopher://', |
75 | 'news://'); |
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76 | |
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77 | global $url_parser_poss_ends; |
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78 | $url_parser_poss_ends = array(' ', "\n", "\r", '<', '>', ".\r", ".\n", |
79 | '. ', ' ', ')', '(', '"', '<', '>', '.<', |
80 | ']', '[', '{', '}', "\240"); |
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81 | |
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82 | |
83 | function parseUrl (&$body) |
84 | { |
85 | global $url_parser_poss_ends, $url_parser_url_tokens;; |
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86 | $start = 0; |
87 | $target_pos = strlen($body); |
88 | |
89 | while ($start != $target_pos) |
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90 | { |
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91 | $target_token = ''; |
92 | |
93 | // Find the first token to replace |
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94 | foreach ($url_parser_url_tokens as $the_token) |
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95 | { |
96 | $pos = strpos(strtolower($body), $the_token, $start); |
97 | if (is_int($pos) && $pos < $target_pos) |
98 | { |
99 | $target_pos = $pos; |
100 | $target_token = $the_token; |
101 | } |
102 | } |
103 | |
104 | // Look for email addresses between $start and $target_pos |
105 | $check_str = substr($body, $start, $target_pos); |
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106 | |
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107 | if (parseEmail($check_str)) |
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108 | { |
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109 | replaceBlock($body, $check_str, $start, $target_pos); |
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110 | $target_pos = strlen($check_str) + $start; |
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111 | } |
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112 | |
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113 | // If there was a token to replace, replace it |
114 | if ($target_token != '') |
115 | { |
116 | // Find the end of the URL |
117 | $end=strlen($body); |
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118 | foreach ($url_parser_poss_ends as $key => $val) |
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119 | { |
120 | $enda = strpos($body,$val,$target_pos); |
121 | if (is_int($enda) && $enda < $end) |
122 | $end = $enda; |
123 | } |
124 | |
125 | // Extract URL |
126 | $url = substr($body, $target_pos, $end-$target_pos); |
127 | |
128 | // Replace URL with HyperLinked Url, requires 1 char in link |
129 | if ($url != '' && $url != $target_token) |
130 | { |
131 | $url_str = "<a href=\"$url\" target=\"_blank\">$url</a>"; |
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132 | replaceBlock($body,$url_str,$target_pos,$end); |
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133 | $target_pos += strlen($url_str); |
134 | } |
135 | else |
136 | { |
137 | // Not quite a valid link, skip ahead to next chance |
138 | $target_pos += strlen($target_token); |
139 | } |
140 | } |
141 | |
142 | // Move forward |
143 | $start = $target_pos; |
144 | $target_pos = strlen($body); |
145 | } |
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146 | } |
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147 | |
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148 | ?> |