| 1 | <?php |
| 2 | |
| 3 | /** |
| 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 | **/ |
| 14 | |
| 15 | function replaceBlock (&$in, $replace, $start, $end) { |
| 16 | $begin = substr($in,0,$start); |
| 17 | $end = substr($in,$end,strlen($in)-$end); |
| 18 | $in = $begin.$replace.$end; |
| 19 | } |
| 20 | |
| 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: |
| 30 | global $IP_RegExp_Match, $Host_RegExp_Match, $Email_RegExp_Match; |
| 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 | ')?@' . $Host_RegExp_Match; |
| 36 | |
| 37 | function parseEmail (&$body) { |
| 38 | global $color, $Email_RegExp_Match; |
| 39 | $Size = strlen($body); |
| 40 | |
| 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" || $where == "TEXT")) { |
| 46 | eregi ($Email_RegExp_Match, $body, $regs); |
| 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 { |
| 53 | $body = eregi_replace ($Email_RegExp_Match, "<a href=\"../src/compose.php?send_to=\\0\">\\0</a>", $body); |
| 54 | } |
| 55 | */ |
| 56 | |
| 57 | $body = eregi_replace ($Email_RegExp_Match, "<a href=\"../src/compose.php?send_to=\\0\">\\0</a>", $body); |
| 58 | |
| 59 | // If there are any changes, it'll just get bigger. |
| 60 | if ($Size != strlen($body)) |
| 61 | return 1; |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | |
| 66 | // We don't want to re-initialize this stuff for every line. Save work |
| 67 | // and just do it once here. |
| 68 | global $url_parser_url_tokens; |
| 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://'); |
| 76 | |
| 77 | global $url_parser_poss_ends; |
| 78 | $url_parser_poss_ends = array(' ', "\n", "\r", '<', '>', ".\r", ".\n", |
| 79 | '. ', ' ', ')', '(', '"', '<', '>', '.<', |
| 80 | ']', '[', '{', '}', "\240"); |
| 81 | |
| 82 | |
| 83 | function parseUrl (&$body) |
| 84 | { |
| 85 | global $url_parser_poss_ends, $url_parser_url_tokens;; |
| 86 | $start = 0; |
| 87 | $target_pos = strlen($body); |
| 88 | |
| 89 | while ($start != $target_pos) |
| 90 | { |
| 91 | $target_token = ''; |
| 92 | |
| 93 | // Find the first token to replace |
| 94 | foreach ($url_parser_url_tokens as $the_token) |
| 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, $target_pos); |
| 106 | |
| 107 | if (parseEmail($check_str)) |
| 108 | { |
| 109 | replaceBlock($body, $check_str, $start, $target_pos); |
| 110 | $target_pos = strlen($check_str) + $start; |
| 111 | } |
| 112 | |
| 113 | // If there was a token to replace, replace it |
| 114 | if ($target_token != '') |
| 115 | { |
| 116 | // Find the end of the URL |
| 117 | $end=strlen($body); |
| 118 | foreach ($url_parser_poss_ends as $key => $val) |
| 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\">$url</a>"; |
| 132 | replaceBlock($body,$url_str,$target_pos,$end); |
| 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 | } |
| 146 | } |
| 147 | |
| 148 | ?> |