201 lines
No EOL
7.2 KiB
PHP
201 lines
No EOL
7.2 KiB
PHP
<?php
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/**
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* url_parser.php
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*
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* Copyright (c) 1999-2004 The SquirrelMail Project Team
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* Licensed under the GNU GPL. For full terms see the file COPYING.
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*
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* This code provides various string manipulation functions that are
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* used by the rest of the Squirrelmail code.
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*
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* @version $Id$
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* @package squirrelmail
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*/
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/**
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* Undocumented - complain, then patch.
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*/
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function replaceBlock (&$in, $replace, $start, $end) {
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$begin = substr($in,0,$start);
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$end = substr($in,$end,strlen($in)-$end);
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$in = $begin.$replace.$end;
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}
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/* Having this defined in just one spot could help when changes need
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* to be made to the pattern
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* Make sure that the expression is evaluated case insensitively
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*
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* RFC2822 (and RFC822) defines the left side of an email address as (roughly):
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* 1*atext *("." 1*atext)
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* where atext is: a-zA-Z0-9!#$%&'*+-/=?^_`{|}~
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*
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* Here's pretty sophisticated IP matching:
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* $IPMatch = '(2[0-5][0-9]|1?[0-9]{1,2})';
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* $IPMatch = '\[?' . $IPMatch . '(\.' . $IPMatch . '){3}\]?';
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*/
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/* Here's enough: */
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global $IP_RegExp_Match, $Host_RegExp_Match, $Email_RegExp_Match;
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$IP_RegExp_Match = '\\[?[0-9]{1,3}(\\.[0-9]{1,3}){3}\\]?';
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$Host_RegExp_Match = '(' . $IP_RegExp_Match .
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'|[0-9a-z]([-.]?[0-9a-z])*\\.[a-z][a-z]+)';
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$atext = '([a-z0-9!#$&%*+/=?^_`{|}~-]|&)';
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$dot_atom = $atext . '+(\.' . $atext . '+)*';
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$Email_RegExp_Match = $dot_atom . '(%' . $Host_RegExp_Match . ')?@' .
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$Host_RegExp_Match;
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/**
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* Parses a body and converts all found email addresses to clickable links.
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*
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* @param string body the body to process, by ref
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* @return int the number of unique addresses found
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*/
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function parseEmail (&$body) {
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global $color, $Email_RegExp_Match;
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$sbody = $body;
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$addresses = array();
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/* Find all the email addresses in the body */
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while(eregi($Email_RegExp_Match, $sbody, $regs)) {
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$addresses[$regs[0]] = strtr($regs[0], array('&' => '&'));
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$start = strpos($sbody, $regs[0]) + strlen($regs[0]);
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$sbody = substr($sbody, $start);
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}
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/* Replace each email address with a compose URL */
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foreach ($addresses as $text => $email) {
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$comp_uri = makeComposeLink('src/compose.php?send_to='.urlencode($email), $text);
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$body = str_replace($text, $comp_uri, $body);
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}
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/* Return number of unique addresses found */
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return count($addresses);
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}
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/* We don't want to re-initialize this stuff for every line. Save work
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* and just do it once here.
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*/
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global $url_parser_url_tokens;
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$url_parser_url_tokens = array(
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'http://',
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'https://',
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'ftp://',
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'telnet:', // Special case -- doesn't need the slashes
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'mailto:', // Special case -- doesn't use the slashes
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'gopher://',
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'news://');
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global $url_parser_poss_ends;
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$url_parser_poss_ends = array(' ', "\n", "\r", '<', '>', ".\r", ".\n",
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'. ', ' ', ')', '(', '"', '<', '>', '.<',
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']', '[', '{', '}', "\240", ', ', '. ', ",\n", ",\r");
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/**
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* rfc 2368 (mailto URL) preg_match() regexp
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* @link http://www.ietf.org/rfc/rfc2368.txt
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* @global string MailTo_PReg_Match the encapsulated regexp for preg_match()
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*/
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global $MailTo_PReg_Match;
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$Mailto_Email_RegExp = '[0-9a-z%]([-_.+%]?[0-9a-z])*(%' . $Host_RegExp_Match . ')?@' . $Host_RegExp_Match;
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$MailTo_PReg_Match = '/((?:' . $Mailto_Email_RegExp . ')*)((?:\?(?:to|cc|bcc|subject|body)=[^\s\?&=,()]+)?(?:&(?:to|cc|bcc|subject|body)=[^\s\?&=,()]+)*)/i';
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/**
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* Parses a body and converts all found URLs to clickable links.
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*
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* @param string body the body to process, by ref
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* @return void
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*/
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function parseUrl (&$body) {
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global $url_parser_poss_ends, $url_parser_url_tokens;
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$start = 0;
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$blength = strlen($body);
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while ($start < $blength) {
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$target_token = '';
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$target_pos = $blength;
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/* Find the first token to replace */
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foreach ($url_parser_url_tokens as $the_token) {
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$pos = strpos(strtolower($body), $the_token, $start);
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if (is_int($pos) && $pos < $target_pos) {
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$target_pos = $pos;
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$target_token = $the_token;
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}
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}
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/* Look for email addresses between $start and $target_pos */
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$check_str = substr($body, $start, $target_pos-$start);
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if (parseEmail($check_str)) {
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replaceBlock($body, $check_str, $start, $target_pos);
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$blength = strlen($body);
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$target_pos = strlen($check_str) + $start;
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}
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/* If there was a token to replace, replace it */
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if ($target_token == 'mailto:') { // rfc 2368 (mailto URL)
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$target_pos += 7; //skip mailto:
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$end = $blength;
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$mailto = substr($body, $target_pos, $end-$target_pos);
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global $MailTo_PReg_Match;
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if ((preg_match($MailTo_PReg_Match, $mailto, $regs)) && ($regs[0] != '')) {
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//sm_print_r($regs);
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$mailto_before = $target_token . $regs[0];
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$mailto_params = $regs[10];
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if ($regs[1]) { //if there is an email addr before '?', we need to merge it with the params
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$to = 'to=' . $regs[1];
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if (strpos($mailto_params, 'to=') > -1) //already a 'to='
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$mailto_params = str_replace('to=', $to . '%2C%20', $mailto_params);
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else {
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if ($mailto_params) //already some params, append to them
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$mailto_params .= '&' . $to;
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else
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$mailto_params .= '?' . $to;
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}
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}
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$url_str = str_replace(array('to=', 'cc=', 'bcc='), array('send_to=', 'send_to_cc=', 'send_to_bcc='), $mailto_params);
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$comp_uri = makeComposeLink('src/compose.php' . $url_str, $mailto_before);
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replaceBlock($body, $comp_uri, $target_pos - 7, $target_pos + strlen($regs[0]));
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$target_pos += strlen($comp_uri) - 7;
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}
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}
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else
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if ($target_token != '') {
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/* Find the end of the URL */
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$end = $blength;
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foreach ($url_parser_poss_ends as $val) {
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$enda = strpos($body, $val, $target_pos);
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if (is_int($enda) && $enda < $end) {
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$end = $enda;
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}
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}
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/* Extract URL */
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$url = substr($body, $target_pos, $end-$target_pos);
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/* Needed since lines are not passed with \n or \r */
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while ( ereg("[,\.]$", $url) ) {
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$url = substr( $url, 0, -1 );
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$end--;
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}
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/* Replace URL with HyperLinked Url, requires 1 char in link */
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if ($url != '' && $url != $target_token) {
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$url_str = "<a href=\"$url\" target=\"_blank\">$url</a>";
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replaceBlock($body,$url_str,$target_pos,$end);
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$target_pos += strlen($url_str);
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}
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else {
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// Not quite a valid link, skip ahead to next chance
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$target_pos += strlen($target_token);
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}
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}
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/* Move forward */
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$start = $target_pos;
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$blength = strlen($body);
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}
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}
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?>
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