X-Git-Url: https://vcs.fsf.org/?p=squirrelmail.git;a=blobdiff_plain;f=functions%2Fmime.php;h=05747945d1627c0e03014201cdc8e1769cbca21b;hp=890dcb9a886d3ddffb2bc23f33efd1e379ea0533;hb=a7ba71a6f38178abe02e1e9a144cf5955defe422;hpb=c7aff9387859d88801fd2c6738ff32d6bbcc0114 diff --git a/functions/mime.php b/functions/mime.php index 890dcb9a..05747945 100644 --- a/functions/mime.php +++ b/functions/mime.php @@ -16,6 +16,8 @@ /** The typical includes... */ require_once(SM_PATH . 'functions/imap.php'); require_once(SM_PATH . 'functions/attachment_common.php'); +/** add sqm_baseuri()*/ +include_once(SM_PATH . 'functions/display_messages.php'); /* -------------------------------------------------------------------------- */ /* MIME DECODING */ @@ -41,7 +43,7 @@ function mime_structure ($bodystructure, $flags=array()) { /* removed urldecode because $_GET is auto urldecoded ??? */ displayPageHeader( $color, $mailbox ); $errormessage = _("SquirrelMail could not decode the bodystructure of the message"); - $errormessage .= '
'._("the provided bodystructure by your imap-server").':

'; + $errormessage .= '
'._("The bodystructure provided by your IMAP server:").'

'; $errormessage .= '
' . htmlspecialchars($read) . '
'; plain_error_message( $errormessage, $color ); echo ''; @@ -134,19 +136,19 @@ function mime_fetch_body($imap_stream, $id, $ent_id=1, $fetch_size=0) { $par .= '&startMessage=' . $startMessage . '&show_more=0'; } $par .= '&response=' . urlencode($response) . - '&message=' . urlencode($message) . - '&topline=' . urlencode($topline); - - echo '
' . - '' . - '' . - '" . - '" . - '" . - '" . - "
' . - _("Body retrieval error. The reason for this is most probably that the message is malformed.") . - '
' . _("Command:") . "$cmd
' . _("Response:") . "$response
' . _("Message:") . "$message
' . _("FETCH line:") . "$topline

"; + '&message=' . urlencode($message) . + '&topline=' . urlencode($topline); + + echo '
' . + '' . + '' . + '" . + '" . + '" . + '" . + "
' . + _("Body retrieval error. The reason for this is most probably that the message is malformed.") . + '
' . _("Command:") . "$cmd
' . _("Response:") . "$response
' . _("Message:") . "$message
' . _("FETCH line:") . "$topline

"; $data = sqimap_run_command ($imap_stream, "FETCH $passed_id BODY[]", true, $response, $message, TRUE); array_shift($data); @@ -157,7 +159,7 @@ function mime_fetch_body($imap_stream, $id, $ent_id=1, $fetch_size=0) { return $ret; } -function mime_print_body_lines ($imap_stream, $id, $ent_id=1, $encoding) { +function mime_print_body_lines ($imap_stream, $id, $ent_id=1, $encoding, $rStream='php://stdout') { /* Don't kill the connection if the browser is over a dialup * and it would take over 30 seconds to download it. @@ -171,14 +173,18 @@ function mime_print_body_lines ($imap_stream, $id, $ent_id=1, $encoding) { Instead, echo the decoded attachment directly to screen */ if (strtolower($encoding) == 'base64') { if (!$ent_id) { - $query = "FETCH $id BODY[]"; + $query = "FETCH $id BODY[]"; } else { - $query = "FETCH $id BODY[$ent_id]"; + $query = "FETCH $id BODY[$ent_id]"; } - sqimap_run_command($imap_stream,$query,true,$response,$message,TRUE,'sqimap_base64_decode','php://stdout',true); + sqimap_run_command($imap_stream,$query,true,$response,$message,TRUE,'sqimap_base64_decode',$rStream,true); } else { - $body = mime_fetch_body ($imap_stream, $id, $ent_id); - echo decodeBody($body, $encoding); + $body = mime_fetch_body ($imap_stream, $id, $ent_id); + if (is_resource($rStream)) { + fputs($rStream,decodeBody($body,$encoding)); + } else { + echo decodeBody($body, $encoding); + } } /* @@ -190,40 +196,13 @@ function mime_print_body_lines ($imap_stream, $id, $ent_id=1, $encoding) { means we also should provide $results from sqimap_fread (by ref) to te function and set $no_return to false. The $filter function for quoted printable should handle unsetting of $results. - */ + */ /* TODO 2: find out how we write to the output stream php://stdout. fwrite doesn't work because 'php://stdout isn't a stream. - */ + */ return; -/* - fputs ($imap_stream, "$sid FETCH $id BODY[$ent_id]\r\n"); - $cnt = 0; - $continue = true; - $read = fgets ($imap_stream,8192); - - - // This could be bad -- if the section has sqimap_session_id() . ' OK' - // or similar, it will kill the download. - while (!ereg("^".$sid_s." (OK|BAD|NO)(.*)$", $read, $regs)) { - if (trim($read) == ')==') { - $read1 = $read; - $read = fgets ($imap_stream,4096); - if (ereg("^".$sid." (OK|BAD|NO)(.*)$", $read, $regs)) { - return; - } else { - echo decodeBody($read1, $encoding) . - decodeBody($read, $encoding); - } - } else if ($cnt) { - echo decodeBody($read, $encoding); - } - $read = fgets ($imap_stream,4096); - $cnt++; -// break; - } -*/ } /* -[ END MIME DECODING ]----------------------------------------------------------- */ @@ -336,7 +315,19 @@ function translateText(&$body, $wrap_at, $charset) { * be displayed as the actual message in the HTML. It contains * everything needed, including HTML Tags, Attachments at the * bottom, etc. - * @param clean Do not output stuff that's irrelevant for the printable version. + * + * Since 1.2.0 function uses message_body hook. + * Till 1.3.0 function included output of formatAttachments(). + * + * @param resource $imap_stream imap connection resource + * @param object $message squirrelmail message object + * @param array $color squirrelmail color theme array + * @param integer $wrap_at number of characters per line + * @param string $ent_num (since 1.3.0) message part id + * @param integer $id (since 1.3.0) message id + * @param string $mailbox (since 1.3.0) imap folder name + * @param boolean $clean (since 1.5.1 and 1.4.6) Do not output stuff that's irrelevant for the printable version. + * @return string html formated message text */ function formatBody($imap_stream, $message, $color, $wrap_at, $ent_num, $id, $mailbox='INBOX', $clean=FALSE) { /* This if statement checks for the entity to show as the @@ -344,7 +335,10 @@ function formatBody($imap_stream, $message, $color, $wrap_at, $ent_num, $id, $ma * order that is their priority. */ global $startMessage, $languages, $squirrelmail_language, - $show_html_default, $sort, $has_unsafe_images, $passed_ent_id; + $show_html_default, $sort, $has_unsafe_images, $passed_ent_id, $use_iframe,$iframe_height; + + // workaround for not updated config.php + if (! isset($use_iframe)) $use_iframe = false; if( !sqgetGlobalVar('view_unsafe_images', $view_unsafe_images, SQ_GET) ) { $view_unsafe_images = false; @@ -354,12 +348,12 @@ function formatBody($imap_stream, $message, $color, $wrap_at, $ent_num, $id, $ma $urlmailbox = urlencode($mailbox); $body_message = getEntity($message, $ent_num); if (($body_message->header->type0 == 'text') || - ($body_message->header->type0 == 'rfc822')) { + ($body_message->header->type0 == 'rfc822')) { $body = mime_fetch_body ($imap_stream, $id, $ent_num); $body = decodeBody($body, $body_message->header->encoding); if (isset($languages[$squirrelmail_language]['XTRA_CODE']) && - function_exists($languages[$squirrelmail_language]['XTRA_CODE'] . '_decode')) { + function_exists($languages[$squirrelmail_language]['XTRA_CODE'] . '_decode')) { if (mb_detect_encoding($body) != 'ASCII') { $body = call_user_func($languages[$squirrelmail_language]['XTRA_CODE'] . '_decode',$body); } @@ -386,13 +380,57 @@ function formatBody($imap_stream, $message, $color, $wrap_at, $ent_num, $id, $ma $body = strip_tags($body); $body = trim($body); translateText($body, $wrap_at, - $body_message->header->getParameter('charset')); + $body_message->header->getParameter('charset')); + } elseif ($use_iframe && ! $clean) { + // $clean is used to remove iframe in printable view. + + /** + * If we don't add html message between iframe tags, + * we must detect unsafe images and modify $has_unsafe_images. + */ + $html_body = magicHTML($body, $id, $message, $mailbox); + + // creating iframe url + $iframeurl=sqm_baseuri().'src/view_html.php?' + . 'mailbox=' . $urlmailbox + . '&passed_id=' . $id + . '&ent_id=' . $ent_num + . '&view_unsafe_images=' . (int) $view_unsafe_images; + + // adding warning message + $body = html_tag('div',_("Viewing HTML formatted email"),'center'); + + /** + * height can't be set to 100%, because it does not work as expected when + * iframe is inside the table. Browsers do not create full height objects + * even when iframe is not nested. Maybe there is some way to get full size + * with CSS. Tested in firefox 1.02 and opera 7.53 + * + * width="100%" does not work as expected, when table width is not set (automatic) + * + * tokul: I think \n"; } else { + // old way of html rendering $body = magicHTML($body, $id, $message, $mailbox); } } else { translateText($body, $wrap_at, - $body_message->header->getParameter('charset')); + $body_message->header->getParameter('charset')); } // if this is the clean display (i.e. printer friendly), stop here. @@ -401,13 +439,13 @@ function formatBody($imap_stream, $message, $color, $wrap_at, $ent_num, $id, $ma } $link = 'passed_id=' . $id . '&ent_id='.$ent_num. - '&mailbox=' . $urlmailbox .'&sort=' . $sort . - '&startMessage=' . $startMessage . '&show_more=0'; + '&mailbox=' . $urlmailbox .'&sort=' . $sort . + '&startMessage=' . $startMessage . '&show_more=0'; if (isset($passed_ent_id)) { $link .= '&passed_ent_id='.$passed_ent_id; } $body .= '
' . _("Download this as a file") . ''; + $link . '">' . _("Download this as a file") . ''; if ($view_unsafe_images) { $text = _("Hide Unsafe Images"); } else { @@ -426,7 +464,21 @@ function formatBody($imap_stream, $message, $color, $wrap_at, $ent_num, $id, $ma return $body; } - +/** + * Displays attachment links and information + * + * Since 1.3.0 function is not included in formatBody() call. + * + * Since 1.0.2 uses attachment $type0/$type1 hook. + * Since 1.2.5 uses attachment $type0/* hook. + * Since 1.5.0 uses attachments_bottom hook. + * + * @param object $message SquirrelMail message object + * @param array $exclude_id message parts that are not attachments. + * @param string $mailbox mailbox name + * @param integer $id message id + * @return string html formated attachment information. + */ function formatAttachments($message, $exclude_id, $mailbox, $id) { global $where, $what, $startMessage, $color, $passed_ent_id; @@ -445,10 +497,10 @@ function formatAttachments($message, $exclude_id, $mailbox, $id) { $type1 = strtolower($header->type1); $name = ''; $links['download link']['text'] = _("Download"); - $links['download link']['href'] = SM_PATH . - "src/download.php?absolute_dl=true&passed_id=$id&mailbox=$urlMailbox&ent_id=$ent"; + $links['download link']['href'] = sqm_baseuri() . + "src/download.php?absolute_dl=true&passed_id=$id&mailbox=$urlMailbox&ent_id=$ent"; if ($type0 =='message' && $type1 == 'rfc822') { - $default_page = SM_PATH . 'src/read_body.php'; + $default_page = sqm_baseuri() . 'src/read_body.php'; $rfc822_header = $att->rfc822_header; $filename = $rfc822_header->subject; if (trim( $filename ) == '') { @@ -462,36 +514,8 @@ function formatAttachments($message, $exclude_id, $mailbox, $id) { } $description = $from_name; } else { - $default_page = SM_PATH . 'src/download.php'; - if (is_object($header->disposition)) { - $filename = $header->disposition->getProperty('filename'); - if (trim($filename) == '') { - $name = decodeHeader($header->disposition->getProperty('name')); - if (trim($name) == '') { - $name = $header->getParameter('name'); - if(trim($name) == '') { - if (trim( $header->id ) == '') { - $filename = 'untitled-[' . $ent . ']' ; - } else { - $filename = 'cid: ' . $header->id; - } - } else { - $filename = $name; - } - } else { - $filename = $name; - } - } - } else { - $filename = $header->getParameter('name'); - if (!trim($filename)) { - if (trim( $header->id ) == '') { - $filename = 'untitled-[' . $ent . ']' ; - } else { - $filename = 'cid: ' . $header->id; - } - } - } + $default_page = sqm_baseuri() . 'src/download.php'; + $filename = $att->getFilename(); if ($header->description) { $description = decodeHeader($header->description); } else { @@ -506,10 +530,10 @@ function formatAttachments($message, $exclude_id, $mailbox, $id) { $passed_ent_id_link = ''; } $defaultlink = $default_page . "?startMessage=$startMessage" - . "&passed_id=$id&mailbox=$urlMailbox" - . '&ent_id='.$ent.$passed_ent_id_link; + . "&passed_id=$id&mailbox=$urlMailbox" + . '&ent_id='.$ent.$passed_ent_id_link; if ($where && $what) { - $defaultlink .= '&where='. urlencode($where).'&what='.urlencode($what); + $defaultlink .= '&where='. urlencode($where).'&what='.urlencode($what); } /* This executes the attachment hook with a specific MIME-type. @@ -517,23 +541,23 @@ function formatAttachments($message, $exclude_id, $mailbox, $id) { * for a more generic type. */ $hookresults = do_hook("attachment $type0/$type1", $links, - $startMessage, $id, $urlMailbox, $ent, $defaultlink, - $display_filename, $where, $what); + $startMessage, $id, $urlMailbox, $ent, $defaultlink, + $display_filename, $where, $what); if(count($hookresults[1]) <= 1) { $hookresults = do_hook("attachment $type0/*", $links, - $startMessage, $id, $urlMailbox, $ent, $defaultlink, - $display_filename, $where, $what); + $startMessage, $id, $urlMailbox, $ent, $defaultlink, + $display_filename, $where, $what); } $links = $hookresults[1]; $defaultlink = $hookresults[6]; $attachments .= '' . - ''.decodeHeader($display_filename).' ' . - '' . show_readable_size($header->size) . - '  ' . - '[ '.htmlspecialchars($type0).'/'.htmlspecialchars($type1).' ] ' . - ''; + ''.decodeHeader($display_filename).' ' . + '' . show_readable_size($header->size) . + '  ' . + '[ '.htmlspecialchars($type0).'/'.htmlspecialchars($type1).' ] ' . + ''; $attachments .= '' . $description . ''; $attachments .= ' '; @@ -544,7 +568,10 @@ function formatAttachments($message, $exclude_id, $mailbox, $id) { } else { $attachments .= '  |  '; } - $attachments .= '' . $val['text'] . ''; + $attachments .= '' + . (isset($val['text']) && !empty($val['text']) ? $val['text'] : '') + . (isset($val['extra']) && !empty($val['extra']) ? $val['extra'] : '') + . ''; } unset($links); $attachments .= "\n"; @@ -596,7 +623,7 @@ function decodeBody($body, $encoding) { $body = $encoding_handler('decode', $body); } else if ($encoding == 'quoted-printable' || - $encoding == 'quoted_printable') { + $encoding == 'quoted_printable') { $body = quoted_printable_decode($body); while (ereg("=\n", $body)) { @@ -631,7 +658,7 @@ function decodeHeader ($string, $utfencode=true,$htmlsave=true,$decide=false) { } if (isset($languages[$squirrelmail_language]['XTRA_CODE']) && - function_exists($languages[$squirrelmail_language]['XTRA_CODE'] . '_decodeheader')) { + function_exists($languages[$squirrelmail_language]['XTRA_CODE'] . '_decodeheader')) { $string = call_user_func($languages[$squirrelmail_language]['XTRA_CODE'] . '_decodeheader', $string); // Do we need to return at this point? // return $string; @@ -673,55 +700,55 @@ function decodeHeader ($string, $utfencode=true,$htmlsave=true,$decide=false) { /* decide about valid decoding */ if ($decide && is_conversion_safe($res[2])) { - $utfencode=true; - $can_be_encoded=true; + $utfencode=true; + $can_be_encoded=true; } else { - $can_be_encoded=false; + $can_be_encoded=false; } switch ($encoding) { - case 'B': - $replace = base64_decode($res[4]); - if ($utfencode) { - if ($can_be_encoded) { - /* convert string to different charset, - * if functions asks for it (usually in compose) - */ - $ret .= charset_convert($res[2],$replace,$default_charset); + case 'B': + $replace = base64_decode($res[4]); + if ($utfencode) { + if ($can_be_encoded) { + /* convert string to different charset, + * if functions asks for it (usually in compose) + */ + $ret .= charset_convert($res[2],$replace,$default_charset); + } else { + // convert string to html codes in order to display it + $ret .= charset_decode($res[2],$replace); + } } else { - // convert string to html codes in order to display it - $ret .= charset_decode($res[2],$replace); - } - } else { - if ($htmlsave) { - $replace = htmlspecialchars($replace); + if ($htmlsave) { + $replace = htmlspecialchars($replace); + } + $ret.= $replace; } - $ret.= $replace; - } - break; - case 'Q': - $replace = str_replace('_', ' ', $res[4]); - $replace = preg_replace('/=([0-9a-f]{2})/ie', 'chr(hexdec("\1"))', - $replace); - if ($utfencode) { - if ($can_be_encoded) { - /* convert string to different charset, - * if functions asks for it (usually in compose) - */ - $replace = charset_convert($res[2], $replace,$default_charset); - } else { - // convert string to html codes in order to display it - $replace = charset_decode($res[2], $replace); - } - } else { - if ($htmlsave) { - $replace = htmlspecialchars($replace); + break; + case 'Q': + $replace = str_replace('_', ' ', $res[4]); + $replace = preg_replace('/=([0-9a-f]{2})/ie', 'chr(hexdec("\1"))', + $replace); + if ($utfencode) { + if ($can_be_encoded) { + /* convert string to different charset, + * if functions asks for it (usually in compose) + */ + $replace = charset_convert($res[2], $replace,$default_charset); + } else { + // convert string to html codes in order to display it + $replace = charset_decode($res[2], $replace); + } + } else { + if ($htmlsave) { + $replace = htmlspecialchars($replace); + } } - } - $ret .= $replace; - break; - default: - break; + $ret .= $replace; + break; + default: + break; } $chunk = $res[5]; $encoded = true; @@ -754,11 +781,16 @@ function decodeHeader ($string, $utfencode=true,$htmlsave=true,$decide=false) { } /** - * Encodes header as quoted-printable + * Encodes header + * + * Function uses XTRA_CODE _encodeheader function, if such function exists. + * + * mb_encode_mimeheader is used, if function is present, 50% or more bytes + * are 8bit and multibyte character set is used. * - * Encode a string according to RFC 1522 for use in headers if it - * contains 8-bit characters or anything that looks like it should - * be encoded. + * Function uses Q encoding by default and encodes a string according to RFC + * 1522 for use in headers if it contains 8-bit characters or anything that + * looks like it should be encoded. * * @param string $string header string, that has to be encoded * @return string quoted-printable encoded string @@ -767,10 +799,19 @@ function encodeHeader ($string) { global $default_charset, $languages, $squirrelmail_language; if (isset($languages[$squirrelmail_language]['XTRA_CODE']) && - function_exists($languages[$squirrelmail_language]['XTRA_CODE'] . '_encodeheader')) { + function_exists($languages[$squirrelmail_language]['XTRA_CODE'] . '_encodeheader')) { return call_user_func($languages[$squirrelmail_language]['XTRA_CODE'] . '_encodeheader', $string); } + // Use B encoding for multibyte charsets + /* + $mb_charsets = array('utf-8','big-5','gb2313','euc-kr'); + if (function_exists('mb_encode_mimeheader') && + in_array($default_charset,$mb_charsets) && + in_array($default_charset,sq_mb_list_encodings())) { + return mb_encode_mimeheader($string,$default_charset,'B',"\r\n"); + }*/ + // Encode only if the string contains 8-bit characters or =? $j = strlen($string); $max_l = 75 - strlen($default_charset) - 7; @@ -781,43 +822,18 @@ function encodeHeader ($string) { for($i = 0; $i < $j; ++$i) { switch($string{$i}) { - case '=': - case '<': - case '>': - case ',': - case '?': - case '_': - if ($iEncStart === false) { - $iEncStart = $i; - } - $cur_l+=3; - if ($cur_l > ($max_l-2)) { - /* if there is an stringpart that doesn't need encoding, add it */ - $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset); - $aRet[] = "=?$default_charset?Q?$ret?="; - $iOffset = $i; - $cur_l = 0; - $ret = ''; - $iEncStart = false; - } else { - $ret .= sprintf("=%02X",ord($string{$i})); - } - break; - case '(': - case ')': - if ($iEncStart !== false) { - $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset); - $aRet[] = "=?$default_charset?Q?$ret?="; - $iOffset = $i; - $cur_l = 0; - $ret = ''; - $iEncStart = false; - } - break; - case ' ': - if ($iEncStart !== false) { - $cur_l++; - if ($cur_l > $max_l) { + case '=': + case '<': + case '>': + case ',': + case '?': + case '_': + if ($iEncStart === false) { + $iEncStart = $i; + } + $cur_l+=3; + if ($cur_l > ($max_l-2)) { + /* if there is an stringpart that doesn't need encoding, add it */ $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset); $aRet[] = "=?$default_charset?Q?$ret?="; $iOffset = $i; @@ -825,50 +841,75 @@ function encodeHeader ($string) { $ret = ''; $iEncStart = false; } else { - $ret .= '_'; + $ret .= sprintf("=%02X",ord($string{$i})); } - } - break; - default: - $k = ord($string{$i}); - if ($k > 126) { - if ($iEncStart === false) { - // do not start encoding in the middle of a string, also take the rest of the word. - $sLeadString = substr($string,0,$i); - $aLeadString = explode(' ',$sLeadString); - $sToBeEncoded = array_pop($aLeadString); - $iEncStart = $i - strlen($sToBeEncoded); - $ret .= $sToBeEncoded; - $cur_l += strlen($sToBeEncoded); - } - $cur_l += 3; - /* first we add the encoded string that reached it's max size */ - if ($cur_l > ($max_l-2)) { + break; + case '(': + case ')': + if ($iEncStart !== false) { $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset); - $aRet[] = "=?$default_charset?Q?$ret?= "; /* the next part is also encoded => separate by space */ - $cur_l = 3; - $ret = ''; + $aRet[] = "=?$default_charset?Q?$ret?="; $iOffset = $i; - $iEncStart = $i; + $cur_l = 0; + $ret = ''; + $iEncStart = false; } - $enc_init = true; - $ret .= sprintf("=%02X", $k); - } else { + break; + case ' ': if ($iEncStart !== false) { $cur_l++; if ($cur_l > $max_l) { $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset); $aRet[] = "=?$default_charset?Q?$ret?="; - $iEncStart = false; $iOffset = $i; $cur_l = 0; $ret = ''; + $iEncStart = false; } else { - $ret .= $string{$i}; + $ret .= '_'; } } - } - break; + break; + default: + $k = ord($string{$i}); + if ($k > 126) { + if ($iEncStart === false) { + // do not start encoding in the middle of a string, also take the rest of the word. + $sLeadString = substr($string,0,$i); + $aLeadString = explode(' ',$sLeadString); + $sToBeEncoded = array_pop($aLeadString); + $iEncStart = $i - strlen($sToBeEncoded); + $ret .= $sToBeEncoded; + $cur_l += strlen($sToBeEncoded); + } + $cur_l += 3; + /* first we add the encoded string that reached it's max size */ + if ($cur_l > ($max_l-2)) { + $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset); + $aRet[] = "=?$default_charset?Q?$ret?= "; /* the next part is also encoded => separate by space */ + $cur_l = 3; + $ret = ''; + $iOffset = $i; + $iEncStart = $i; + } + $enc_init = true; + $ret .= sprintf("=%02X", $k); + } else { + if ($iEncStart !== false) { + $cur_l++; + if ($cur_l > $max_l) { + $aRet[] = substr($string,$iOffset,$iEncStart-$iOffset); + $aRet[] = "=?$default_charset?Q?$ret?="; + $iEncStart = false; + $iOffset = $i; + $cur_l = 0; + $ret = ''; + } else { + $ret .= $string{$i}; + } + } + } + break; } } @@ -892,8 +933,17 @@ function find_ent_id($id, $message) { } else { if (strcasecmp($message->entities[$i]->header->id, $id) == 0) { // if (sq_check_save_extension($message->entities[$i])) { - return $message->entities[$i]->entity_id; + return $message->entities[$i]->entity_id; // } + } elseif (!empty($message->entities[$i]->header->parameters['name'])) { + /** + * This is part of a fix for Outlook Express 6.x generating + * cid URLs without creating content-id headers + * @@JA - 20050207 + */ + if (strcasecmp($message->entities[$i]->header->parameters['name'], $id) == 0) { + return $message->entities[$i]->entity_id; + } } } } @@ -913,23 +963,30 @@ function sq_check_save_extension($message) { */ /** - * This function is more or less a wrapper around stripslashes. Apparently - * Explorer is stupid enough to just remove the backslashes and then - * execute the content of the attribute as if nothing happened. - * Who does that? + * This function checks attribute values for entity-encoded values + * and returns them translated into 8-bit strings so we can run + * checks on them. * - * @param attvalue The value of the attribute - * @return attvalue The value of the attribute stripslashed. + * @param $attvalue A string to run entity check against. + * @return Nothing, modifies a reference value. */ -function sq_unbackslash($attvalue){ +function sq_defang(&$attvalue){ + $me = 'sq_defang'; /** - * Remove any backslashes. See if there are any first. + * Skip this if there aren't ampersands or backslashes. */ - - if (strstr($attvalue, '\\') !== false){ - $attvalue = stripslashes($attvalue); + if (strpos($attvalue, '&') === false + && strpos($attvalue, '\\') === false){ + return; } - return $attvalue; + $m = false; + do { + $m = false; + $m = $m || sq_deent($attvalue, '/\�*(\d+);*/s'); + $m = $m || sq_deent($attvalue, '/\�*((\d|[a-f])+);*/si', true); + $m = $m || sq_deent($attvalue, '/\\\\(\d+)/s', true); + } while ($m == true); + $attvalue = stripslashes($attvalue); } /** @@ -938,14 +995,14 @@ function sq_unbackslash($attvalue){ * be funny to make "java[tab]script" be just as good as "javascript". * * @param attvalue The attribute value before extraneous spaces removed. - * @return attvalue The attribute value after extraneous spaces removed. + * @return attvalue Nothing, modifies a reference value. */ -function sq_unspace($attvalue){ - if (strcspn($attvalue, "\t\r\n") != strlen($attvalue)){ - $attvalue = str_replace(Array("\t", "\r", "\n"), Array('', '', ''), - $attvalue); +function sq_unspace(&$attvalue){ + $me = 'sq_unspace'; + if (strcspn($attvalue, "\t\r\n\0 ") != strlen($attvalue)){ + $attvalue = str_replace(Array("\t", "\r", "\n", "\0", " "), + Array('', '', '', '', ''), $attvalue); } - return $attvalue; } /** @@ -1132,6 +1189,7 @@ function sq_getnxtag($body, $offset){ break; } + $tag_start = $pos; $tagname = ''; /** * Look for next [\W-_], which will indicate the end of the tag name. @@ -1191,6 +1249,7 @@ function sq_getnxtag($body, $offset){ * At this point we loop in order to find all attributes. */ $attname = ''; + $atttype = false; $attary = Array(); while ($pos <= strlen($body)){ @@ -1349,51 +1408,31 @@ function sq_getnxtag($body, $offset){ } /** - * This function checks attribute values for entity-encoded values - * and returns them translated into 8-bit strings so we can run - * checks on them. + * Translates entities into literal values so they can be checked. * - * @param $attvalue A string to run entity check against. - * @return Translated value. + * @param $attvalue the by-ref value to check. + * @param $regex the regular expression to check against. + * @param $hex whether the entites are hexadecimal. + * @return True or False depending on whether there were matches. */ - -function sq_deent($attvalue){ +function sq_deent(&$attvalue, $regex, $hex=false){ $me = 'sq_deent'; - /** - * See if we have to run the checks first. All entities must start - * with "&". - */ - if (strpos($attvalue, '&') === false){ - return $attvalue; - } - /** - * Check named entities first. - */ - $trans = get_html_translation_table(HTML_ENTITIES); - /** - * Leave " in, as it can mess us up. - */ - $trans = array_flip($trans); - unset($trans{'"'}); - while (list($ent, $val) = each($trans)){ - $attvalue = preg_replace('/' . $ent . '*/si', $val, $attvalue); - } - /** - * Now translate numbered entities from 1 to 255 if needed. - */ - if (strpos($attvalue, '#') !== false){ - $omit = Array(34, 39); - for ($asc = 256; $asc >= 0; $asc--){ - if (!in_array($asc, $omit)){ - $chr = chr($asc); - $octrule = '/\�*' . $asc . ';*/si'; - $hexrule = '/\�*' . dechex($asc) . ';*/si'; - $attvalue = preg_replace($octrule, $chr, $attvalue); - $attvalue = preg_replace($hexrule, $chr, $attvalue); + $ret_match = false; + preg_match_all($regex, $attvalue, $matches); + if (is_array($matches) && sizeof($matches[0]) > 0){ + $repl = Array(); + for ($i = 0; $i < sizeof($matches[0]); $i++){ + $numval = $matches[1][$i]; + if ($hex){ + $numval = hexdec($numval); } + $repl{$matches[0][$i]} = chr($numval); } + $attvalue = strtr($attvalue, $repl); + return true; + } else { + return false; } - return $attvalue; } /** @@ -1435,15 +1474,8 @@ function sq_fixatts($tagname, /** * Remove any backslashes, entities, and extraneous whitespace. */ - $attvalue = sq_unbackslash($attvalue); - $attvalue = sq_deent($attvalue); - $attvalue = sq_unspace($attvalue); - - /** - * Remove \r \n \t \0 " " "\\" - */ - $attvalue = str_replace(Array("\r", "\n", "\t", "\0", " ", "\\"), - Array('', '','','','',''), $attvalue); + sq_defang($attvalue); + sq_unspace($attvalue); /** * Now let's run checks on the attvalues. @@ -1470,12 +1502,33 @@ function sq_fixatts($tagname, } } } + + /** + * Replace empty src tags with the blank image. src is only used + * for frames, images, and image inputs. Doing a replace should + * not affect them working as should be, however it will stop + * IE from being kicked off when src for img tags are not set + */ + if (($attname == 'src') && ($attvalue == '""')) { + $attary{$attname} = '"' . SM_PATH . 'images/blank.png"'; + } + /** * Turn cid: urls into http-friendly ones. */ if (preg_match("/^[\'\"]\s*cid:/si", $attvalue)){ $attary{$attname} = sq_cid2http($message, $id, $attvalue, $mailbox); } + + /** + * "Hack" fix for Outlook using propriatary outbind:// protocol in img tags. + * One day MS might actually make it match something useful, for now, falling + * back to using cid2http, so we can grab the blank.png. + */ + if (preg_match("/^[\'\"]\s*outbind:\/\//si", $attvalue)) { + $attary{$attname} = sq_cid2http($message, $id, $attvalue, $mailbox); + } + } /** * See if we need to append any attributes to this tag. @@ -1508,51 +1561,84 @@ function sq_fixstyle($body, $pos, $message, $id, $mailbox){ $newpos = $ret[0] + strlen($ret[2]); $content = $ret[1]; /** - * First look for general BODY style declaration, which would be - * like so: - * body {background: blah-blah} - * and change it to .bodyclass so we can just assign it to a
- */ + * First look for general BODY style declaration, which would be + * like so: + * body {background: blah-blah} + * and change it to .bodyclass so we can just assign it to a
+ */ $content = preg_replace("|body(\s*\{.*?\})|si", ".bodyclass\\1", $content); $secremoveimg = '../images/' . _("sec_remove_eng.png"); /** - * Fix url('blah') declarations. - */ - $content = preg_replace("|url\s*\(\s*([\'\"])\s*\S+script\s*:.*?([\'\"])\s*\)|si", - "url(\\1$secremoveimg\\2)", $content); - /** - * Fix url('https*://.*) declarations but only if $view_unsafe_images - * is false. - */ - if (!$view_unsafe_images){ - $content = preg_replace("|url\s*\(\s*([\'\"])\s*https*:.*?([\'\"])\s*\)|si", - "url(\\1$secremoveimg\\2)", $content); + * Fix url('blah') declarations. + */ + // $content = preg_replace("|url\s*\(\s*([\'\"])\s*\S+script\s*:.*?([\'\"])\s*\)|si", + // "url(\\1$secremoveimg\\2)", $content); + // remove NUL + $content = str_replace("\0", "", $content); + // NB I insert NUL characters to keep to avoid an infinite loop. They are removed after the loop. + while (preg_match("/url\s*\(\s*[\'\"]?([^:]+):(.*)?[\'\"]?\s*\)/si", $content, $matches)) { + $sProto = strtolower($matches[1]); + switch ($sProto) { + /** + * Fix url('https*://.*) declarations but only if $view_unsafe_images + * is false. + */ + case 'https': + case 'http': + if (!$view_unsafe_images){ + $sExpr = "/url\s*\(\s*([\'\"])\s*$sProto*:.*?([\'\"])\s*\)/si"; + $content = preg_replace($sExpr, "u\0r\0l(\\1$secremoveimg\\2)", $content); + } + break; + /** + * Fix urls that refer to cid: + */ + case 'cid': + $cidurl = 'cid:'. $matches[2]; + $httpurl = sq_cid2http($message, $id, $cidurl, $mailbox); + $content = preg_replace("|url\s*\(\s*$cidurl\s*\)|si", + "u\0r\0l($httpurl)", $content); + break; + default: + /** + * replace url with protocol other then the white list + * http,https and cid by an empty string. + */ + $content = preg_replace("/url\s*\(\s*[\'\"]?([^:]+):(.*)?[\'\"]?\s*\)/si", + "", $content); + break; + } + break; } + // remove NUL + $content = str_replace("\0", "", $content); - /** - * Fix urls that refer to cid: - */ - while (preg_match("|url\s*\(\s*([\'\"]\s*cid:.*?[\'\"])\s*\)|si", - $content, $matches)){ - $cidurl = $matches{1}; - $httpurl = sq_cid2http($message, $id, $cidurl, $mailbox); - $content = preg_replace("|url\s*\(\s*$cidurl\s*\)|si", - "url($httpurl)", $content); - } + /** + * Remove any backslashes, entities, and extraneous whitespace. + */ + $contentTemp = $content; + sq_defang($contentTemp); + sq_unspace($contentTemp); /** * Fix stupid css declarations which lead to vulnerabilities * in IE. */ $match = Array('/expression/i', - '/behaviou*r/i', - '/binding/i', - '/include-source/i'); + '/behaviou*r/i', + '/binding/i', + '/include-source/i'); $replace = Array('idiocy', 'idiocy', 'idiocy', 'idiocy'); - $content = preg_replace($match, $replace, $content); + $contentNew = preg_replace($match, $replace, $contentTemp); + if ($contentNew !== $contentTemp) { + // insecure css declarations are used. From now on we don't care + // anymore if the css is destroyed by sq_deent, sq_unspace or sq_unbackslash + $content = $contentNew; + } return array($content, $newpos); } + /** * This function converts cid: url's into the ones that can be viewed in * the browser. @@ -1574,15 +1660,46 @@ function sq_cid2http($message, $id, $cidurl, $mailbox){ $quotchar = ''; } $cidurl = substr(trim($cidurl), 4); + + $match_str = '/\{.*?\}\//'; + $str_rep = ''; + $cidurl = preg_replace($match_str, $str_rep, $cidurl); + $linkurl = find_ent_id($cidurl, $message); /* in case of non-save cid links $httpurl should be replaced by a sort of unsave link image */ $httpurl = ''; - if ($linkurl) { + + /** + * This is part of a fix for Outlook Express 6.x generating + * cid URLs without creating content-id headers. These images are + * not part of the multipart/related html mail. The html contains + * references to + * attached images with as goal to render them inline although + * the attachment disposition property is not inline. + */ + + if (empty($linkurl)) { + if (preg_match('/{.*}\//', $cidurl)) { + $cidurl = preg_replace('/{.*}\//','', $cidurl); + if (!empty($cidurl)) { + $linkurl = find_ent_id($cidurl, $message); + } + } + } + + if (!empty($linkurl)) { $httpurl = $quotchar . SM_PATH . 'src/download.php?absolute_dl=true&' . - "passed_id=$id&mailbox=" . urlencode($mailbox) . - '&ent_id=' . $linkurl . $quotchar; + "passed_id=$id&mailbox=" . urlencode($mailbox) . + '&ent_id=' . $linkurl . $quotchar; + } else { + /** + * If we couldn't generate a proper img url, drop in a blank image + * instead of sending back empty, otherwise it causes unusual behaviour + */ + $httpurl = $quotchar . SM_PATH . 'images/blank.png' . $quotchar; } + return $httpurl; } @@ -1608,8 +1725,7 @@ function sq_body2div($attary, $mailbox, $message, $id){ $attvalue = str_replace($quotchar, "", $attvalue); switch ($attname){ case 'background': - $attvalue = sq_cid2http($message, $id, - $attvalue, $mailbox); + $attvalue = sq_cid2http($message, $id, $attvalue, $mailbox); $styledef .= "background-image: url('$attvalue'); "; break; case 'bgcolor': @@ -1722,7 +1838,7 @@ function sq_sanitize($body, $tagname = "div"; } if (isset($open_tags{$tagname}) && - $open_tags{$tagname} > 0){ + $open_tags{$tagname} > 0){ $open_tags{$tagname}--; } else { $tagname = false; @@ -1739,7 +1855,7 @@ function sq_sanitize($body, * tagtype appropriately. */ if ($tagtype == 1 - && in_array($tagname, $self_closing_tags)){ + && in_array($tagname, $self_closing_tags)){ $tagtype = 3; } /** @@ -1747,13 +1863,13 @@ function sq_sanitize($body, * inside it. */ if ($tagtype == 1 && - in_array($tagname, $rm_tags_with_content)){ + in_array($tagname, $rm_tags_with_content)){ $skip_content = $tagname; } else { if (($rm_tags == false - && in_array($tagname, $tag_list)) || - ($rm_tags == true && - !in_array($tagname, $tag_list))){ + && in_array($tagname, $tag_list)) || + ($rm_tags == true && + !in_array($tagname, $tag_list))){ $tagname = false; } else { /** @@ -1762,7 +1878,7 @@ function sq_sanitize($body, if ($tagname == "body"){ $tagname = "div"; $attary = sq_body2div($attary, $mailbox, - $message, $id); + $message, $id); } if ($tagtype == 1){ if (isset($open_tags{$tagname})){ @@ -1814,9 +1930,18 @@ function sq_sanitize($body, * * @param $body the body of the message * @param $id the id of the message + + * @param $message + * @param $mailbox + * @param boolean $take_mailto_links When TRUE, converts mailto: links + * into internal SM compose links + * (optional; default = TRUE) * @return a string with html safe to display in the browser. */ -function magicHTML($body, $id, $message, $mailbox = 'INBOX') { +function magicHTML($body, $id, $message, $mailbox = 'INBOX', $take_mailto_links =true) { + + require_once(SM_PATH . 'functions/url_parser.php'); // for $MailTo_PReg_Match + global $attachment_common_show_images, $view_unsafe_images, $has_unsafe_images; /** @@ -1824,105 +1949,110 @@ function magicHTML($body, $id, $message, $mailbox = 'INBOX') { */ $attachment_common_show_images = false; $tag_list = Array( - false, - "object", - "meta", - "html", - "head", - "base", - "link", - "frame", - "iframe", - "plaintext", - "marquee" - ); + false, + "object", + "meta", + "html", + "head", + "base", + "link", + "frame", + "iframe", + "plaintext", + "marquee" + ); $rm_tags_with_content = Array( - "script", - "applet", - "embed", - "title", - "frameset", - "xml" - ); + "script", + "applet", + "embed", + "title", + "frameset", + "xmp", + "xml" + ); $self_closing_tags = Array( - "img", - "br", - "hr", - "input" - ); + "img", + "br", + "hr", + "input", + "outbind" + ); $force_tag_closing = true; $rm_attnames = Array( - "/.*/" => - Array( - "/target/i", - "/^on.*/i", - "/^dynsrc/i", - "/^data.*/i", - "/^lowsrc.*/i" - ) - ); + "/.*/" => + Array( + "/target/i", + "/^on.*/i", + "/^dynsrc/i", + "/^data.*/i", + "/^lowsrc.*/i" + ) + ); $secremoveimg = "../images/" . _("sec_remove_eng.png"); $bad_attvals = Array( - "/.*/" => + "/.*/" => Array( "/^src|background/i" => + Array( Array( - Array( - "/^([\'\"])\s*\S+script\s*:.*([\'\"])/si", - "/^([\'\"])\s*mocha\s*:*.*([\'\"])/si", - "/^([\'\"])\s*about\s*:.*([\'\"])/si" - ), - Array( - "\\1$secremoveimg\\2", - "\\1$secremoveimg\\2", - "\\1$secremoveimg\\2", - "\\1$secremoveimg\\2" - ) + "/^([\'\"])\s*\S+script\s*:.*([\'\"])/si", + "/^([\'\"])\s*mocha\s*:*.*([\'\"])/si", + "/^([\'\"])\s*about\s*:.*([\'\"])/si" ), + Array( + "\\1$secremoveimg\\2", + "\\1$secremoveimg\\2", + "\\1$secremoveimg\\2", + "\\1$secremoveimg\\2" + ) + ), "/^href|action/i" => + Array( Array( - Array( - "/^([\'\"])\s*\S+script\s*:.*([\'\"])/si", - "/^([\'\"])\s*mocha\s*:*.*([\'\"])/si", - "/^([\'\"])\s*about\s*:.*([\'\"])/si" - ), - Array( - "\\1#\\1", - "\\1#\\1", - "\\1#\\1", - "\\1#\\1" - ) + "/^([\'\"])\s*\S+script\s*:.*([\'\"])/si", + "/^([\'\"])\s*mocha\s*:*.*([\'\"])/si", + "/^([\'\"])\s*about\s*:.*([\'\"])/si" ), - "/^style/i" => Array( - Array( - "/expression/i", - "/binding/i", - "/behaviou*r/i", - "/include-source/i", - "/url\s*\(\s*([\'\"])\s*\S+script\s*:.*([\'\"])\s*\)/si", - "/url\s*\(\s*([\'\"])\s*mocha\s*:.*([\'\"])\s*\)/si", - "/url\s*\(\s*([\'\"])\s*about\s*:.*([\'\"])\s*\)/si", - "/(.*)\s*:\s*url\s*\(\s*([\'\"]*)\s*\S+script\s*:.*([\'\"]*)\s*\)/si" - ), - Array( - "idiocy", - "idiocy", - "idiocy", - "idiocy", - "url(\\1#\\1)", - "url(\\1#\\1)", - "url(\\1#\\1)", - "url(\\1#\\1)", - "\\1:url(\\2#\\3)" - ) - ) + "\\1#\\1", + "\\1#\\1", + "\\1#\\1", + "\\1#\\1" + ) + ), + "/^style/i" => + Array( + Array( + "/expression/i", + "/binding/i", + "/behaviou*r/i", + "/include-source/i", + "/position\s*:\s*absolute/i", + "/url\s*\(\s*([\'\"])\s*\S+script\s*:.*([\'\"])\s*\)/si", + "/url\s*\(\s*([\'\"])\s*mocha\s*:.*([\'\"])\s*\)/si", + "/url\s*\(\s*([\'\"])\s*about\s*:.*([\'\"])\s*\)/si", + "/(.*)\s*:\s*url\s*\(\s*([\'\"]*)\s*\S+script\s*:.*([\'\"]*)\s*\)/si" + ), + Array( + "idiocy", + "idiocy", + "idiocy", + "idiocy", + "", + "url(\\1#\\1)", + "url(\\1#\\1)", + "url(\\1#\\1)", + "url(\\1#\\1)", + "url(\\1#\\1)", + "\\1:url(\\2#\\3)" + ) ) + ) ); if( !sqgetGlobalVar('view_unsafe_images', $view_unsafe_images, SQ_GET) ) { $view_unsafe_images = false; @@ -1932,22 +2062,22 @@ function magicHTML($body, $id, $message, $mailbox = 'INBOX') { * Remove any references to http/https if view_unsafe_images set * to false. */ - array_push($bad_attvals{'/.*/'}{'/^src|background/i'}[0], - '/^([\'\"])\s*https*:.*([\'\"])/si'); - array_push($bad_attvals{'/.*/'}{'/^src|background/i'}[1], - "\\1$secremoveimg\\1"); - array_push($bad_attvals{'/.*/'}{'/^style/i'}[0], - '/url\(([\'\"])\s*https*:.*([\'\"])\)/si'); - array_push($bad_attvals{'/.*/'}{'/^style/i'}[1], - "url(\\1$secremoveimg\\1)"); + array_push($bad_attvals{'/.*/'}{'/^src|background/i'}[0], + '/^([\'\"])\s*https*:.*([\'\"])/si'); + array_push($bad_attvals{'/.*/'}{'/^src|background/i'}[1], + "\\1$secremoveimg\\1"); + array_push($bad_attvals{'/.*/'}{'/^style/i'}[0], + '/url\(([\'\"])\s*https*:.*([\'\"])\)/si'); + array_push($bad_attvals{'/.*/'}{'/^style/i'}[1], + "url(\\1$secremoveimg\\1)"); } $add_attr_to_tag = Array( - "/^a$/i" => - Array('target'=>'"_new"', - 'title'=>'"'._("This external link will open in a new window").'"' - ) - ); + "/^a$/i" => + Array('target'=>'"_blank"', + 'title'=>'"'._("This external link will open in a new window").'"' + ) + ); $trusted = sq_sanitize($body, $tag_list, $rm_tags_with_content, @@ -1963,6 +2093,59 @@ function magicHTML($body, $id, $message, $mailbox = 'INBOX') { if (preg_match("|$secremoveimg|i", $trusted)){ $has_unsafe_images = true; } + + // we want to parse mailto's in HTML output, change to SM compose links + // this is a modified version of code from url_parser.php... but Marc is + // right: we need a better filtering implementation; adding this randomly + // here is not a great solution + // + if ($take_mailto_links) { + // parseUrl($trusted); // this even parses URLs inside of tags... too aggressive + global $MailTo_PReg_Match; + $MailTo_PReg_Match = '/mailto:' . substr($MailTo_PReg_Match, 1); + if ((preg_match_all($MailTo_PReg_Match, $trusted, $regs)) && ($regs[0][0] != '')) { + foreach ($regs[0] as $i => $mailto_before) { + $mailto_params = $regs[10][$i]; + // get rid of any tailing quote since we have to add send_to to the end + // + if (substr($mailto_before, strlen($mailto_before) - 1) == '"') + $mailto_before = substr($mailto_before, 0, strlen($mailto_before) - 1); + if (substr($mailto_params, strlen($mailto_params) - 1) == '"') + $mailto_params = substr($mailto_params, 0, strlen($mailto_params) - 1); + + if ($regs[1][$i]) { //if there is an email addr before '?', we need to merge it with the params + $to = 'to=' . $regs[1][$i]; + if (strpos($mailto_params, 'to=') > -1) //already a 'to=' + $mailto_params = str_replace('to=', $to . '%2C%20', $mailto_params); + else { + if ($mailto_params) //already some params, append to them + $mailto_params .= '&' . $to; + else + $mailto_params .= '?' . $to; + } + } + + $url_str = preg_replace(array('/to=/i', '/(?\|;]', '_', str_replace(' ', ' ', $filename)); - } - - // A Pox on Microsoft and it's Internet Explorer! - // - // IE has lots of bugs with file downloads. - // It also has problems with SSL. Both of these cause problems - // for us in this function. - // - // See this article on Cache Control headers and SSL - // http://support.microsoft.com/default.aspx?scid=kb;en-us;323308 - // - // The best thing you can do for IE is to upgrade to the latest - // version - //set all the Cache Control Headers for IE - if ($isIE) { - $filename=rawurlencode($filename); - header ("Pragma: public"); - header ("Cache-Control: no-store, max-age=0, no-cache, must-revalidate"); # HTTP/1.1 - header ("Cache-Control: post-check=0, pre-check=0", false); - header ("Cache-control: private"); - - //set the inline header for IE, we'll add the attachment header later if we need it - header ("Content-Disposition: inline; filename=$filename"); - } - - if (!$force) { - // Try to show in browser window - header ("Content-Disposition: inline; filename=\"$filename\""); - header ("Content-Type: $type0/$type1; name=\"$filename\""); - } else { - // Try to pop up the "save as" box - - // IE makes this hard. It pops up 2 save boxes, or none. - // http://support.microsoft.com/support/kb/articles/Q238/5/88.ASP - // http://support.microsoft.com/default.aspx?scid=kb;EN-US;260519 - // But, according to Microsoft, it is "RFC compliant but doesn't - // take into account some deviations that allowed within the - // specification." Doesn't that mean RFC non-compliant? - // http://support.microsoft.com/support/kb/articles/Q258/4/52.ASP - - // all browsers need the application/octet-stream header for this - header ("Content-Type: application/octet-stream; name=\"$filename\""); - - // http://support.microsoft.com/support/kb/articles/Q182/3/15.asp - // Do not have quotes around filename, but that applied to - // "attachment"... does it apply to inline too? - header ("Content-Disposition: attachment; filename=\"$filename\""); - - if ($isIE && !$isIE6) { - // This combination seems to work mostly. IE 5.5 SP 1 has - // known issues (see the Microsoft Knowledge Base) - - // This works for most types, but doesn't work with Word files - header ("Content-Type: application/download; name=\"$filename\""); - - // These are spares, just in case. :-) - //header("Content-Type: $type0/$type1; name=\"$filename\""); - //header("Content-Type: application/x-msdownload; name=\"$filename\""); - //header("Content-Type: application/octet-stream; name=\"$filename\""); - } else { - // another application/octet-stream forces download for Netscape - header ("Content-Type: application/octet-stream; name=\"$filename\""); - } - } - - //send the content-length header if the calling function provides it - if ($filesize > 0) { - header("Content-Length: $filesize"); - } +function SendDownloadHeaders($type0, $type1, $filename, $force, $filesize=0) { + global $languages, $squirrelmail_language; + $isIE = $isIE6 = 0; + + sqgetGlobalVar('HTTP_USER_AGENT', $HTTP_USER_AGENT, SQ_SERVER); + + if (strstr($HTTP_USER_AGENT, 'compatible; MSIE ') !== false && + strstr($HTTP_USER_AGENT, 'Opera') === false) { + $isIE = 1; + } + + if (strstr($HTTP_USER_AGENT, 'compatible; MSIE 6') !== false && + strstr($HTTP_USER_AGENT, 'Opera') === false) { + $isIE6 = 1; + } + + if (isset($languages[$squirrelmail_language]['XTRA_CODE']) && + function_exists($languages[$squirrelmail_language]['XTRA_CODE'] . '_downloadfilename')) { + $filename = + call_user_func($languages[$squirrelmail_language]['XTRA_CODE'] . '_downloadfilename', $filename, $HTTP_USER_AGENT); + } else { + $filename = ereg_replace('[\\/:\*\?"<>\|;]', '_', str_replace(' ', ' ', $filename)); + } + + // A Pox on Microsoft and it's Internet Explorer! + // + // IE has lots of bugs with file downloads. + // It also has problems with SSL. Both of these cause problems + // for us in this function. + // + // See this article on Cache Control headers and SSL + // http://support.microsoft.com/default.aspx?scid=kb;en-us;323308 + // + // The best thing you can do for IE is to upgrade to the latest + // version + //set all the Cache Control Headers for IE + if ($isIE) { + $filename=rawurlencode($filename); + header ("Pragma: public"); + header ("Cache-Control: no-store, max-age=0, no-cache, must-revalidate"); // HTTP/1.1 + header ("Cache-Control: post-check=0, pre-check=0", false); + header ("Cache-Control: private"); + + //set the inline header for IE, we'll add the attachment header later if we need it + header ("Content-Disposition: inline; filename=$filename"); + } + + if (!$force) { + // Try to show in browser window + header ("Content-Disposition: inline; filename=\"$filename\""); + header ("Content-Type: $type0/$type1; name=\"$filename\""); + } else { + // Try to pop up the "save as" box + + // IE makes this hard. It pops up 2 save boxes, or none. + // http://support.microsoft.com/support/kb/articles/Q238/5/88.ASP + // http://support.microsoft.com/default.aspx?scid=kb;EN-US;260519 + // But, according to Microsoft, it is "RFC compliant but doesn't + // take into account some deviations that allowed within the + // specification." Doesn't that mean RFC non-compliant? + // http://support.microsoft.com/support/kb/articles/Q258/4/52.ASP + + // all browsers need the application/octet-stream header for this + header ("Content-Type: application/octet-stream; name=\"$filename\""); + + // http://support.microsoft.com/support/kb/articles/Q182/3/15.asp + // Do not have quotes around filename, but that applied to + // "attachment"... does it apply to inline too? + header ("Content-Disposition: attachment; filename=\"$filename\""); + + if ($isIE && !$isIE6) { + // This combination seems to work mostly. IE 5.5 SP 1 has + // known issues (see the Microsoft Knowledge Base) + + // This works for most types, but doesn't work with Word files + header ("Content-Type: application/download; name=\"$filename\""); + + // These are spares, just in case. :-) + //header("Content-Type: $type0/$type1; name=\"$filename\""); + //header("Content-Type: application/x-msdownload; name=\"$filename\""); + //header("Content-Type: application/octet-stream; name=\"$filename\""); + } else { + // another application/octet-stream forces download for Netscape + header ("Content-Type: application/octet-stream; name=\"$filename\""); + } + } + + //send the content-length header if the calling function provides it + if ($filesize > 0) { + header("Content-Length: $filesize"); + } } // end fn SendDownloadHeaders -?> \ No newline at end of file +?>