class_mime_decode.php

webmail系统 php + mysql

						$ctype = $headers["content-type"];
	
						$Actype = split(";",$headers["content-type"]);
						$types = split("/",$Actype[0]); $rctype = strtolower($Actype[0]);
	
						if($rctype == "multipart/alternative")
							$msgbody = $this->build_alternative_body($ctype,$body);
						elseif($rctype == "text/plain" && strpos($headers["content-disposition"],"name") === false) {
							$msgbody = $this->build_text_body($this->compile_body($body,$headers["content-transfer-encoding"]));
						} elseif($rctype == "text/html" && strpos($headers["content-disposition"],"name") === false) {
							$body = $this->compile_body($body,$headers["content-transfer-encoding"]);
							if(!$mime_show_html)
								$body = $this->build_text_body(strip_tags($body));
							$msgbody = $body;
						} elseif($rctype == "multipart/related" && strpos($headers["content-disposition"],"name") === false) {
							$msgbody = $this->build_related_body($ctype,$body);
						} else {
							$thisattach = $this->build_attach($header,$body,$boundary,$i);
						}
					}
				}
				break;
			case "alternative":
				$msgbody = $this->build_alternative_body($ctype[1],$body);
				break;
			case "related":
				$msgbody = $this->build_related_body($type,$body);
				break;
			default:
				$thisattach = $this->build_attach($header,$body,"",0);
			}
			break;
		default:
			$thisattach = $this->build_attach($header,$body,"",0);
		}
		return $msgbody;
	}

	function build_attach($header,$body,$boundary,$part) {
		global $mail,$temporary_directory,$userfolder;

		$headers = $this->decode_header($header);
		$cdisp = $headers["content-disposition"];
		$ctype = $headers["content-type"]; $ctype2 = explode(";",$ctype); $ctype2 = $ctype2[0];
		
		$Atype = split("/",$ctype);
		$Acdisp = split(";",$cdisp);

		$tenc = $headers["content-transfer-encoding"];

		if($temp) $dir_to_save = $userfolder; //"temporary_files/";

		if($Atype[0] == "message") {
			$divpos = strpos($body,"\n\r");
			$attachheader = substr($body,0,$divpos);
			$attachheaders = $this->decode_header($attachheader);
			$filename = $this->decode_mime_string($attachheaders["subject"]);
			if($filename == "")
				$filename = uniqid("");
			$filename = substr(ereg_replace("[^A-Za-z0-9]","_",$filename),0,20).".eml";
		} else {
			$fname = $Acdisp[1];
			$filename = substr($fname,strpos($fname,"filename=")+9,strlen($fname));
			if($filename == "") 
				$filename = substr($ctype,strpos($ctype,"name=")+5,strlen($ctype));
			if(substr($filename,0,1) == "\"" && substr($filename,-1) == "\"")
				$filename = substr($filename,1,strlen($filename)-2);
			$filename = $this->decode_mime_string($filename);
		}


		if($Atype[0] != "message")
			$body = $this->compile_body($body,$tenc);

		$indice = count($this->content["attachments"]);
		$this->content["attachments"][$indice]["name"] = $filename;
		$this->content["attachments"][$indice]["size"] = strlen($body);
		$this->content["attachments"][$indice]["temp"] = $temp;
		$this->content["attachments"][$indice]["content-type"] = $ctype2; //$Atype[0];
		$this->content["attachments"][$indice]["content-disposition"] = $Acdisp[0];
		$this->content["attachments"][$indice]["boundary"] = $boundary;
		$this->content["attachments"][$indice]["part"] = $part;
		return $this->content["attachments"][$indice];
	}

	function compile_body($body,$enctype) {
		$enctype = explode(" ",$enctype); $enctype = $enctype[0];
		if(strtolower($enctype) == "base64")
			$body = base64_decode($body);
		elseif(strtolower($enctype) == "quoted-printable")
			$body = $this->decode_qp($body);
		return $body;

	}

	function download_attach($header,$body,$down=1) {
		$headers = $this->decode_header($header);

		$cdisp = $headers["content-disposition"];
		$ctype = $headers["content-type"];

		$type = split(";",$ctype); $type = $type[0];
		$Atype = split("/",$ctype);
		$Acdisp = split(";",$cdisp);
		$tenc = strtolower($headers["content-transfer-encoding"]);

		if($Atype[0] == "message") {
			$divpos = strpos($body,"\n\r");
			$attachheader = substr($body,0,$divpos);
			$attachheaders = $this->decode_header($attachheader);
			$filename = $this->decode_mime_string($attachheaders["subject"]);
			if($filename == "")
				$filename = uniqid("");
			$filename = substr(ereg_replace("[^A-Za-z0-9]","_",$filename),0,20);
			$filename .= ".eml";
		} else {
			$fname = $Acdisp[1];
			$filename = substr($fname,strpos(strtolower($fname),"filename=")+9,strlen($fname));
			if($filename == "") 
				$filename = substr($ctype,strpos(strtolower($ctype),"name=")+5,strlen($ctype));
			if(substr($filename,0,1) == "\"" && substr($filename,-1) == "\"")
				$filename = substr($filename,1,strlen($filename)-2);
			$filename = $this->decode_mime_string($filename);
		}

		if($Atype[0] != "message")
			$body = $this->compile_body($body,$tenc);

		$content_type = ($down)?"application/octet-stream":strtolower($type);
		$filesize = strlen($body);

		header("Content-Type: $content_type; name=\"$filename\"\r\n"
		."Content-Length: $filesize\r\n");
		$cdisp = ($down)?"attachment":"inline";
		header("Content-Disposition: $cdisp; filename=\"$filename\"\r\n");
		echo($body);
	}

	function get_mail_info($header) {
		$myarray = Array();
		$headers = $this->decode_header($header);

		/*
		echo("<pre>");
		print_r($headers);
		echo("</pre>");
		*/

		$message_id = $headers["message-id"];

		if(substr($message_id,0,1) == "<" && substr($message_id,-1) == ">")
			$message_id = substr($message_id,1,strlen($message_id)-2);

		$myarray["content-type"] = $headers["content-type"];
		$myarray["content-transfer-encoding"] = str_replace("GM","-",$headers["content-transfer-encoding"]);
		$myarray["message-id"] = $message_id;

		$received = $headers["received"];

		if($received != "") {
			$received = explode(";",$received);
			$mydate = $received[1];
		} else
			$mydate = $headers["date"];

		$myarray["date"] = $this->build_mime_date($mydate);
		$myarray["subject"] = $this->decode_mime_string($headers["subject"]);
		$myarray["from"] = $this->get_names($headers["from"]);
		$myarray["to"] = $this->get_names($headers["to"]);
		$myarray["cc"] = $this->get_names($headers["cc"]);
		$myarray["status"] = $headers["status"];
		$myarray["read"] = ($headers["status"] == "N")?0:1;

		return $myarray;

	}

	function build_mime_date($mydate) {

		$mydate = explode(",",$mydate); 
		$mydate = trim($mydate[count($mydate)-1]);
		$parts = explode(" ",$mydate);
		if(count($parts) < 4) { return time(); }
		$day = $parts[0];

		switch(strtolower($parts[1])) {
			case "jan": $mon = 1; break;
			case "feb":	$mon = 2; break;
			case "mar":	$mon = 3; break;
			case "apr":	$mon = 4; break;
			case "may":	$mon = 5; break;
			case "jun": $mon = 6; break;
			case "jul": $mon = 7; break;
			case "aug": $mon = 8; break;
			case "sep": $mon = 9; break;
			case "oct": $mon = 10; break;
			case "nov": $mon = 11; break;
			case "dec": $mon = 12; break;
		}
		
		$year = $parts[2];
		$ahours = explode(":",$parts[3]);
		$hour = $ahours[0]; $min = $ahours[1]; $sec = $ahours[2];

		return mktime ($hour, $min, $sec, $mon, $day, $year);

	}

	function initialize($email) {
		$email = $this->fetch_structure($email);
		$body = $email["body"];
		$header = $email["header"];
		$mail_info = $this->get_mail_info($header);

		$this->content["headers"] = $header;
		$this->content["date"] = $mail_info["date"];
		$this->content["subject"] = $mail_info["subject"];
		$this->content["message-id"] = $mail_info["message-id"];
		$this->content["from"] = $mail_info["from"];
		$this->content["to"] = $mail_info["to"];
		$this->content["cc"] = $mail_info["cc"];
		$this->content["body"] = $this->process_message($header,$body);
		$this->content["read"] = $mail_info["read"];
	}

	function split_parts($boundary,$body) {
		$startpos = strpos($body,"$boundary")+strlen("$boundary")+2;
		$lenbody = strpos($body,"\r\n$boundary--") - $startpos;
		$body = substr($body,$startpos,$lenbody);
		return split($boundary."\r\n",$body);
	}

	function get_boundary($ctype){
		$boundary = trim(substr($ctype,strpos(strtolower($ctype),"boundary=")+9,strlen($ctype)));
		$boundary = split(";",$boundary);$boundary = $boundary[0];

		if(substr($boundary,0,1) == "\"" && substr($boundary,-1) == "\"")
			$boundary = substr($boundary,1,strlen($boundary)-2);
		$boundary = "--".$boundary;
		return $boundary;
	}

	function set_as($email,$type=1) {
		$status = ($type)?"Y":"N";
		$tempmail = $this->fetch_structure($email);
		$thisheader = $tempmail["header"];
		$mail_info = $this->get_mail_info($thisheader);
		$decoded_headers = $this->decode_header($thisheader);

		while(list($key,$val) = each($decoded_headers))
			if (eregi("status",$key)) {
				$newmail .= ucfirst($key).": $status\r\n"; $headerok = 1;
			} else $newmail .= ucfirst($key).": ".trim($val)."\r\n";
		if(!$headerok) $newmail .= "Status: $status\r\n";
		$newmail = trim($newmail)."\r\n\r\n".trim($tempmail["body"]);
		return $newmail;
	}

}
?>