MIME email with CID imgs, I need to convert the CID Attribute to URLs, any help?

Ahmed Nasr · June 5, 2010

Hello, I'm just new here, I was searching for any good documentation for imap functions, but I couldn't find any. any how, I need a help for this case:

I have a website where members can publish contents via email, they are sending a message with html body and embeded imgs in, but in case these imgs are having cid numbers, instead of urls, they can't be visible.

I tried a simple prototype to resolve this, by using some functions of www.squirrelmail.org, but I couldn't make them work.

do you have a way to solve?

now this is the code I have:

<?
   $ServerName = "{www.redcherry.com.sa:143/notls}"; // For a IMAP connection    (PORT 143)   
   $UserName = "user";
   $PassWord = "pass";
   
   $mbox = imap_open($ServerName, $UserName,$PassWord) or die("Could not open Mailbox - try again later!"); 
   if ($hdr = imap_check($mbox)) {
   echo "Num Messages " . $hdr->Nmsgs ."\n\n<br><br>";
   	$msgCount = $hdr->Nmsgs;
   } else {
   	echo "failed";
   }
   if (!$_GET['n']){
   $MN=$msgCount;
   $overview=imap_fetch_overview($mbox,"1:$MN",0);
   $size=sizeof($overview);
   
   echo "<table border=\"0\" cellspacing=\"0\" width=\"582\">";
   
   for($i=$size-1;$i>=0;$i--){
   	$val=$overview[$i];
	$msg=$val->msgno;
   	$from=$val->from;
  		$date=$val->date;
	$subj=$val->subject;
   	$seen=$val->seen;
   
   $from = ereg_replace("\"","",$from);
   
   // MAKE DANISH DATE DISPLAY
   	list($dayName,$day,$month,$year,$time) = split(" ",$date); 
	$time = substr($time,0,5);
   	$date = $day ." ". $month ." ". $year . " ". $time;
   
   	if ($bgColor == "#F0F0F0") {
   		$bgColor = "#FFFFFF";
   	} else {
		$bgColor = "#F0F0F0";
	}
   
	if (strlen($subj) > 60) {
   		$subj = substr($subj,0,59) ."...";
	}
   
   	echo "<tr bgcolor=\"$bgColor\"><td colspan=\"2\">$from</td><td colspan=\"2\"><a href=\"?n=$msg\">$subj</a></td>
   		 <td class=\"tblContent\" colspan=\"2\">$date</td></tr>\n";
   }
echo "</table><p>";
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////	
else if ($_GET['n']){ //if message selected
$msgno=$_GET['n'];
   // GET TEXT BODY
   $dataTxt = get_part($mbox, $msgno, "TEXT/PLAIN");
   
   /////////////////////////////////////////////////////////////////
   $fetchedArray=imap_fetchstructure($mbox,$msgno);
   
   if ($fetchedArray->dparameters)
   $attr=$fetchedArray->dparameters;
   else
   $attr=$fetchedArray->parameters;
   
   //print_r($attr1);
   //echo "<br />second<br/>";

   foreach ($attr as $attname=>$attvalue){
   $cidhttp=sq_cid2http($attname, $msgno, $attvalue, $mbox);						//////////////////////////////////////////////////sq_cid2http
   echo "<img src=\"$cidhttp\">";
   }
   /////////////////////////////////////////////////////////////////
   
   
   // GET HTML BODY
   $dataHtml = get_part($mbox, $msgno, "TEXT/HTML");
   
   if ($dataHtml != "") {
   $msgBody = $dataHtml;
   	$mailformat = "html";
   } else {
   	$msgBody = ereg_replace("\n","<br>",$dataTxt);
   	$mailformat = "text";
   }
// To out put the message body to the user simply print $msgBody like this.
   
   if ($mailformat == "text") {
   	echo "<html><head><title>Messagebody</title></head><body bgcolor=\"white\">$msgBody</body></html>";
   } else {
   	echo $msgBody; // It contains all HTML HEADER tags so we don't have to make them.
   }
   
   //////////////////////////////////////////////////////////////////////// Attachments \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
$struct = imap_fetchstructure($mbox,$msgno);
   $contentParts = count($struct->parts);
   
   if ($contentParts >= 2) {
   for ($i=2;$i<=$contentParts;$i++) {
   	$att[$i-2] = imap_bodystruct($mbox,$msgno,$i);
   	}
   	for ($k=0;$k<sizeof($att);$k++) {
   		if ($att[$k]->parameters[0]->value == "us-ascii" || $att[$k]->parameters[0]->value    == "US-ASCII") {
   			if ($att[$k]->parameters[1]->value != "") {
   				$selectBoxDisplay[$k] = $att[$k]->parameters[1]->value;
   			}
   		} elseif ($att[$k]->parameters[0]->value != "iso-8859-1" &&    $att[$k]->parameters[0]->value != "ISO-8859-1") {
   			$selectBoxDisplay[$k] = $att[$k]->parameters[0]->value;
   		}
   	}
   }
   
   if (sizeof($selectBoxDisplay) > 0) {
   	echo "<select name=\"attachments\" size=\"3\" class=\"tblContent\" style=\"width:170;\">";
   	for ($j=0;$j<sizeof($selectBoxDisplay);$j++) {
   		echo "\n<option value=\"$j\">". $selectBoxDisplay[$j]    ."</option>";
   	}
   	echo "</select>";
   }
   
   } //Message body page end
   imap_close($mbox);

?>
<?
   function get_mime_type(&$structure) {
   $primary_mime_type = array("TEXT", "MULTIPART","MESSAGE", "APPLICATION", "AUDIO","IMAGE", "VIDEO", "OTHER");
   if($structure->subtype) {
   	return $primary_mime_type[(int) $structure->type] . '/' .$structure->subtype;
   }
   	return "TEXT/PLAIN";
   }
   function get_part($stream, $msg_number, $mime_type, $structure = false,$part_number    = false) {
   
   	if(!$structure) {
   		$structure = imap_fetchstructure($stream, $msg_number);
   	}
   	if($structure) {
   		if($mime_type == get_mime_type($structure)) {
   			if(!$part_number) {
   				$part_number = "1";
   			}
   			$text = imap_fetchbody($stream, $msg_number, $part_number);
   			if($structure->encoding == 3) {
   				return imap_base64($text);
   			} else if($structure->encoding == 4) {
   				return imap_qprint($text);
   			} else {
   			return $text;
   		}
   	}
   
	if($structure->type == 1) /* multipart */ {
   		while(list($index, $sub_structure) = each($structure->parts)) {
   			if($part_number) {
   				$prefix = $part_number . '.';
   			}
   			$data = get_part($stream, $msg_number, $mime_type, $sub_structure,$prefix .    ($index + 1));
   			if($data) {
   				return $data;
   			}
   		} // END OF WHILE
   		} // END OF MULTIPART
   	} // END OF STRUTURE
   	return false;
   } // END OF FUNCTION
   
   
///////////////////////////////////////// sq functions\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\   
   
   function sq_cid2http($message, $id, $cidurl, $mailbox){
    /**
     * Get rid of quotes.
     */

 print_r($cidurl);
    $quotchar = substr($cidurl, 0, 1);
    if ($quotchar == '"' || $quotchar == "'"){
        $cidurl = str_replace($quotchar, "", $cidurl);
    } else {
        $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-safe cid links $httpurl should be replaced by a sort of
       unsafe link image */
    $httpurl = '';

    /**
     * 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
     * <img src="cid:{some_id}/image_filename.ext"> 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 = $quotchar . "../" . 'src/download.php?absolute_dl=true&' .
            "passed_id=$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 . "../" . 'images/blank.png' . $quotchar;
    }

    return $httpurl;
}

function find_ent_id($id, $message) {
    for ($i = 0, $ret = ''; $ret == '' && $i < count($message->entities); $i++) {
        if ($message->entities[$i]->header->type0 == 'multipart')  {
            $ret = find_ent_id($id, $message->entities[$i]);
        } else {
            if (strcasecmp($message->entities[$i]->header->id, $id) == 0) {
//                if (sq_check_save_extension($message->entities[$i])) {
                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;
                }
            }
        }
    }
    return $ret;
}
?>

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MIME email with CID imgs, I need to convert the CID Attribute to URLs, any help?

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