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1 | <?php |
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2 | |
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3 | /** |
4 | * url_parser.php |
5 | * |
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6 | * Copyright (c) 1999-2002 The SquirrelMail Project Team |
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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 | /*****************************************************************/ |
16 | /*** THIS FILE NEEDS TO HAVE ITS FORMATTING FIXED!!! ***/ |
17 | /*** PLEASE DO SO AND REMOVE THIS COMMENT SECTION. ***/ |
18 | /*** + Base level indent should begin at left margin, as ***/ |
19 | /*** the first line of the function definition below. ***/ |
20 | /*** + All identation should consist of four space blocks ***/ |
21 | /*** + Tab characters are evil. ***/ |
22 | /*** + all comments should use "slash-star ... star-slash" ***/ |
23 | /*** style -- no pound characters, no slash-slash style ***/ |
24 | /*** + FLOW CONTROL STATEMENTS (if, while, etc) SHOULD ***/ |
25 | /*** ALWAYS USE { AND } CHARACTERS!!! ***/ |
26 | /*** + Please use ' instead of ", when possible. Note " ***/ |
27 | /*** should always be used in _( ) function calls. ***/ |
28 | /*** Thank you for your help making the SM code more readable. ***/ |
29 | /*****************************************************************/ |
30 | |
31 | function replaceBlock (&$in, $replace, $start, $end) { |
32 | $begin = substr($in,0,$start); |
33 | $end = substr($in,$end,strlen($in)-$end); |
34 | $in = $begin.$replace.$end; |
35 | } |
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36 | |
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37 | // Having this defined in just one spot could help when changes need |
38 | // to be made to the pattern |
39 | // Make sure that the expression is evaluated case insensitively |
40 | // |
41 | // Here's pretty sophisticated IP matching: |
42 | // $IPMatch = '(2[0-5][0-9]|1?[0-9]{1,2})'; |
43 | // $IPMatch = '\[?' . $IPMatch . '(\.' . $IPMatch . '){3}\]?'; |
44 | // |
45 | // Here's enough: |
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46 | global $IP_RegExp_Match, $Host_RegExp_Match, $Email_RegExp_Match; |
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47 | $IP_RegExp_Match = '\\[?[0-9]{1,3}(\\.[0-9]{1,3}){3}\\]?'; |
48 | $Host_RegExp_Match = '(' . $IP_RegExp_Match . |
49 | '|[0-9a-z]([-.]?[0-9a-z])*\\.[a-z][a-z]+)'; |
50 | $Email_RegExp_Match = '[0-9a-z]([-_.]?[0-9a-z])*(%' . $Host_RegExp_Match . |
51 | ')?@' . $Host_RegExp_Match; |
52 | |
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53 | function parseEmail (&$body) { |
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54 | global $color, $Email_RegExp_Match; |
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55 | $Size = strlen($body); |
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56 | |
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57 | /* |
58 | This is here in case we ever decide to use highlighting of searched |
59 | text. this does it for email addresses |
60 | |
61 | if ($what && ($where == "BODY" || $where == "TEXT")) { |
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62 | eregi ($Email_RegExp_Match, $body, $regs); |
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63 | $oldaddr = $regs[0]; |
64 | if ($oldaddr) { |
65 | $newaddr = eregi_replace ($what, "<b><font color=\"$color[2]\">$what</font></font></b>", $oldaddr); |
66 | $body = str_replace ($oldaddr, "<a href=\"../src/compose.php?send_to=$oldaddr\">$newaddr</a>", $body); |
67 | } |
68 | } else { |
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69 | $body = eregi_replace ($Email_RegExp_Match, "<a href=\"../src/compose.php?send_to=\\0\">\\0</a>", $body); |
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70 | } |
71 | */ |
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72 | |
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73 | $body = eregi_replace ($Email_RegExp_Match, "<a href=\"../src/compose.php?send_to=\\0\">\\0</a>", $body); |
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74 | |
75 | // If there are any changes, it'll just get bigger. |
76 | if ($Size != strlen($body)) |
77 | return 1; |
78 | return 0; |
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79 | } |
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80 | |
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81 | |
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82 | // We don't want to re-initialize this stuff for every line. Save work |
83 | // and just do it once here. |
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84 | global $url_parser_url_tokens; |
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85 | $url_parser_url_tokens = array( |
86 | 'http://', |
87 | 'https://', |
88 | 'ftp://', |
89 | 'telnet:', // Special case -- doesn't need the slashes |
90 | 'gopher://', |
91 | 'news://'); |
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92 | |
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93 | global $url_parser_poss_ends; |
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94 | $url_parser_poss_ends = array(' ', "\n", "\r", '<', '>', ".\r", ".\n", |
95 | '. ', ' ', ')', '(', '"', '<', '>', '.<', |
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96 | ']', '[', '{', '}', "\240", ', ', '. ', ",\n", ",\r"); |
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97 | |
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98 | |
99 | function parseUrl (&$body) |
100 | { |
101 | global $url_parser_poss_ends, $url_parser_url_tokens;; |
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102 | $start = 0; |
103 | $target_pos = strlen($body); |
104 | |
105 | while ($start != $target_pos) |
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106 | { |
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107 | $target_token = ''; |
108 | |
109 | // Find the first token to replace |
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110 | foreach ($url_parser_url_tokens as $the_token) |
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111 | { |
112 | $pos = strpos(strtolower($body), $the_token, $start); |
113 | if (is_int($pos) && $pos < $target_pos) |
114 | { |
115 | $target_pos = $pos; |
116 | $target_token = $the_token; |
117 | } |
118 | } |
119 | |
120 | // Look for email addresses between $start and $target_pos |
121 | $check_str = substr($body, $start, $target_pos); |
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122 | |
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123 | if (parseEmail($check_str)) |
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124 | { |
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125 | replaceBlock($body, $check_str, $start, $target_pos); |
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126 | $target_pos = strlen($check_str) + $start; |
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127 | } |
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128 | |
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129 | // If there was a token to replace, replace it |
130 | if ($target_token != '') |
131 | { |
132 | // Find the end of the URL |
133 | $end=strlen($body); |
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134 | foreach ($url_parser_poss_ends as $key => $val) |
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135 | { |
136 | $enda = strpos($body,$val,$target_pos); |
137 | if (is_int($enda) && $enda < $end) |
138 | $end = $enda; |
139 | } |
140 | |
141 | // Extract URL |
142 | $url = substr($body, $target_pos, $end-$target_pos); |
143 | |
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144 | // Needed since lines are not passed with \n or \r |
145 | while ( ereg("[,\.]$", $url) ) { |
146 | $url = substr( $url, 0, -1 ); |
147 | $end--; |
148 | } |
149 | |
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150 | // Replace URL with HyperLinked Url, requires 1 char in link |
151 | if ($url != '' && $url != $target_token) |
152 | { |
153 | $url_str = "<a href=\"$url\" target=\"_blank\">$url</a>"; |
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154 | replaceBlock($body,$url_str,$target_pos,$end); |
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155 | $target_pos += strlen($url_str); |
156 | } |
157 | else |
158 | { |
159 | // Not quite a valid link, skip ahead to next chance |
160 | $target_pos += strlen($target_token); |
161 | } |
162 | } |
163 | |
164 | // Move forward |
165 | $start = $target_pos; |
166 | $target_pos = strlen($body); |
167 | } |
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168 | } |
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169 | |
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170 | ?> |