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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) 1999-2004 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 | * $Id$ |
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13 | * @package squirrelmail |
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14 | */ |
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15 | |
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16 | /** |
17 | * Undocumented - complain, then patch. |
18 | */ |
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19 | function replaceBlock (&$in, $replace, $start, $end) { |
20 | $begin = substr($in,0,$start); |
21 | $end = substr($in,$end,strlen($in)-$end); |
22 | $in = $begin.$replace.$end; |
23 | } |
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24 | |
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25 | /* Having this defined in just one spot could help when changes need |
26 | * to be made to the pattern |
27 | * Make sure that the expression is evaluated case insensitively |
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28 | * |
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29 | * Here's pretty sophisticated IP matching: |
30 | * $IPMatch = '(2[0-5][0-9]|1?[0-9]{1,2})'; |
31 | * $IPMatch = '\[?' . $IPMatch . '(\.' . $IPMatch . '){3}\]?'; |
32 | */ |
33 | /* Here's enough: */ |
34 | global $IP_RegExp_Match, $Host_RegExp_Match, $Email_RegExp_Match; |
35 | $IP_RegExp_Match = '\\[?[0-9]{1,3}(\\.[0-9]{1,3}){3}\\]?'; |
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36 | $Host_RegExp_Match = '(' . $IP_RegExp_Match . |
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37 | '|[0-9a-z]([-.]?[0-9a-z])*\\.[a-z][a-z]+)'; |
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38 | $Email_RegExp_Match = '[0-9a-z]([-_.+]?[0-9a-z])*(%' . $Host_RegExp_Match . |
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39 | ')?@' . $Host_RegExp_Match; |
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40 | |
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41 | /** |
42 | * Parses a body and converts all found email addresses to clickable links. |
43 | * |
44 | * @param string body the body to process, by ref |
45 | * @return int the number of unique addresses found |
46 | */ |
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47 | function parseEmail (&$body) { |
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48 | global $color, $Email_RegExp_Match; |
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49 | $sbody = $body; |
50 | $addresses = array(); |
51 | |
52 | /* Find all the email addresses in the body */ |
53 | while(eregi($Email_RegExp_Match, $sbody, $regs)) { |
54 | $addresses[$regs[0]] = $regs[0]; |
55 | $start = strpos($sbody, $regs[0]) + strlen($regs[0]); |
56 | $sbody = substr($sbody, $start); |
57 | } |
58 | /* Replace each email address with a compose URL */ |
59 | foreach ($addresses as $email) { |
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60 | $comp_uri = makeComposeLink('src/compose.php?send_to='.urlencode($email), $email); |
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61 | $body = str_replace($email, $comp_uri, $body); |
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62 | } |
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63 | /* Return number of unique addresses found */ |
64 | return count($addresses); |
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65 | } |
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66 | |
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67 | |
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68 | /* We don't want to re-initialize this stuff for every line. Save work |
69 | * and just do it once here. |
70 | */ |
71 | global $url_parser_url_tokens; |
72 | $url_parser_url_tokens = array( |
73 | 'http://', |
74 | 'https://', |
75 | 'ftp://', |
76 | 'telnet:', // Special case -- doesn't need the slashes |
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77 | 'mailto:', // Special case -- doesn't use the slashes |
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78 | 'gopher://', |
79 | 'news://'); |
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80 | |
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81 | global $url_parser_poss_ends; |
82 | $url_parser_poss_ends = array(' ', "\n", "\r", '<', '>', ".\r", ".\n", |
83 | '. ', ' ', ')', '(', '"', '<', '>', '.<', |
84 | ']', '[', '{', '}', "\240", ', ', '. ', ",\n", ",\r"); |
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85 | |
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86 | |
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87 | /** |
88 | * rfc 2368 (mailto URL) preg_match() regexp |
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89 | * @link http://www.ietf.org/rfc/rfc2368.txt |
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90 | * @global string MailTo_PReg_Match the encapsulated regexp for preg_match() |
91 | */ |
92 | global $MailTo_PReg_Match; |
93 | $Mailto_Email_RegExp = '[0-9a-z%]([-_.+%]?[0-9a-z])*(%' . $Host_RegExp_Match . ')?@' . $Host_RegExp_Match; |
94 | $MailTo_PReg_Match = '/((?:' . $Mailto_Email_RegExp . ')*)((?:\?(?:to|cc|bcc|subject|body)=[^\s\?&=,()]+)?(?:&(?:to|cc|bcc|subject|body)=[^\s\?&=,()]+)*)/i'; |
95 | |
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96 | /** |
97 | * Parses a body and converts all found URLs to clickable links. |
98 | * |
99 | * @param string body the body to process, by ref |
100 | * @return void |
101 | */ |
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102 | function parseUrl (&$body) { |
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103 | global $url_parser_poss_ends, $url_parser_url_tokens; |
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104 | $start = 0; |
105 | $blength = strlen($body); |
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106 | |
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107 | while ($start < $blength) { |
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108 | $target_token = ''; |
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109 | $target_pos = $blength; |
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110 | |
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111 | /* Find the first token to replace */ |
112 | foreach ($url_parser_url_tokens as $the_token) { |
113 | $pos = strpos(strtolower($body), $the_token, $start); |
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114 | if (is_int($pos) && $pos < $blength) { |
115 | $target_pos = $pos; |
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116 | $target_token = $the_token; |
117 | } |
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118 | } |
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119 | |
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120 | /* Look for email addresses between $start and $target_pos */ |
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121 | $check_str = substr($body, $start, $target_pos-$start); |
122 | |
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123 | if (parseEmail($check_str)) { |
124 | replaceBlock($body, $check_str, $start, $target_pos); |
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125 | $blength = strlen($body); |
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126 | $target_pos = strlen($check_str) + $start; |
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127 | } |
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128 | |
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129 | /* If there was a token to replace, replace it */ |
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130 | if ($target_token == 'mailto:') { // rfc 2368 (mailto URL) |
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131 | $target_pos += 7; //skip mailto: |
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132 | $end = $blength; |
133 | |
134 | $mailto = substr($body, $target_pos, $end-$target_pos); |
135 | |
136 | global $MailTo_PReg_Match; |
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137 | if ((preg_match($MailTo_PReg_Match, $mailto, $regs)) && ($regs[0] != '')) { |
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138 | //sm_print_r($regs); |
139 | $mailto_before = $target_token . $regs[0]; |
140 | $mailto_params = $regs[10]; |
141 | if ($regs[1]) { //if there is an email addr before '?', we need to merge it with the params |
142 | $to = 'to=' . $regs[1]; |
143 | if (strpos($mailto_params, 'to=') > -1) //already a 'to=' |
144 | $mailto_params = str_replace('to=', $to . '%2C%20', $mailto_params); |
145 | else { |
146 | if ($mailto_params) //already some params, append to them |
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147 | $mailto_params .= '&' . $to; |
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148 | else |
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149 | $mailto_params .= '?' . $to; |
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150 | } |
151 | } |
152 | $url_str = str_replace(array('to=', 'cc=', 'bcc='), array('send_to=', 'send_to_cc=', 'send_to_bcc='), $mailto_params); |
153 | $comp_uri = makeComposeLink('src/compose.php' . $url_str, $mailto_before); |
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154 | replaceBlock($body, $comp_uri, $target_pos - 7, $target_pos + strlen($regs[0])); |
155 | $target_pos += strlen($comp_uri) - 7; |
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156 | } |
157 | } |
158 | else |
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159 | if ($target_token != '') { |
160 | /* Find the end of the URL */ |
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161 | $end = $blength; |
162 | foreach ($url_parser_poss_ends as $val) { |
163 | $enda = strpos($body, $val, $target_pos); |
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164 | if (is_int($enda) && $enda < $end) { |
165 | $end = $enda; |
166 | } |
167 | } |
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168 | |
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169 | /* Extract URL */ |
170 | $url = substr($body, $target_pos, $end-$target_pos); |
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171 | |
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172 | /* Needed since lines are not passed with \n or \r */ |
173 | while ( ereg("[,\.]$", $url) ) { |
174 | $url = substr( $url, 0, -1 ); |
175 | $end--; |
176 | } |
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177 | |
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178 | /* Replace URL with HyperLinked Url, requires 1 char in link */ |
179 | if ($url != '' && $url != $target_token) { |
180 | $url_str = "<a href=\"$url\" target=\"_blank\">$url</a>"; |
181 | replaceBlock($body,$url_str,$target_pos,$end); |
182 | $target_pos += strlen($url_str); |
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183 | } |
184 | else { |
185 | // Not quite a valid link, skip ahead to next chance |
186 | $target_pos += strlen($target_token); |
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187 | } |
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188 | } |
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189 | |
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190 | /* Move forward */ |
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191 | $start = $target_pos; |
192 | $blength = strlen($body); |
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193 | } |
194 | } |
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195 | ?> |