145 lines
4.7 KiB
PHP
145 lines
4.7 KiB
PHP
<?php
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/**
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* url_parser.php
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*
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* Copyright (c) 1999-2003 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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* $Id$
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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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* 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 = '(' . $IP_RegExp_Match .
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'|[0-9a-z]([-.]?[0-9a-z])*\\.[a-z][a-z]+)';
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$Email_RegExp_Match = '[0-9a-z]([-_.+]?[0-9a-z])*(%' . $Host_RegExp_Match .
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')?@' . $Host_RegExp_Match;
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function parseEmail (&$body) {
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global $color, $Email_RegExp_Match, $compose_new_win;
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$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]] = $regs[0];
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$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 $email) {
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$comp_uri = '../src/compose.php?send_to='.urlencode($email);
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if ($compose_new_win == '1') {
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$comp_uri = 'javascript:void(0)" onClick="comp_in_new('
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. "'$comp_uri'" . ')';
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}
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$comp_uri = '<a href="'.$comp_uri.'">'.$email.'</a>';
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$body = str_replace($email, $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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'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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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 < $blength) {
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$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 != '') {
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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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