functions/mime.php

   1 <?
   2    /** mime.php
   3     **
   4     ** This contains the functions necessary to detect and decode MIME messages.
   5     **/
   6
   7
   8    function decodeMime($body, $bound, $type0, $type1) {
   9 //      echo "$type0/$type1<BR>";
  10       if ($type0 == "multipart") {
  11          if ($body[0] == "")
  12             $i = 1;
  13          else
  14             $i = 0;
  15
  16          $bound = trim($bound);
  17          $bound = "--$bound";
  18          while ($i < count($body)) {
  19             if (trim($body[$i]) == $bound) {
  20                $j = $i + 1;
  21                $p = 0;
  22
  23                while (substr(trim($body[$j]), 0, strlen($bound)) != $bound) {
  24                   $entity_body[$p] = $body[$j];
  25                   $j++;
  26                   $p++;
  27                }
  28                fetchEntityHeader($imapConnection, $entity_body, $ent_type0, $ent_type1, $ent_bound, &$encoding, &$charset);
  29                $entity = getEntity($entity_body, $ent_bound, $ent_type0, $ent_type1, $encoding, $charset);
  30
  31                $q = count($full_message);
  32                $full_message[$q] = $entity[0];
  33             }
  34             $i++;
  35          }
  36       } else {
  37          $full_message = getEntity($body, $bound, $type0, $type1);
  38       }
  39
  40       return $full_message;
  41    }
  42
  43    /** This gets one entity's properties **/
  44    function getEntity($body, $bound, $type0, $type1, $encoding, $charset) {
  45 //      echo "--$type0/$type1--<BR>";
  46       $msg[0]["TYPE0"] = $type0;
  47       $msg[0]["TYPE1"] = $type1;
  48       $msg[0]["ENCODING"] = $encoding;
  49       $msg[0]["CHARSET"] = $charset;
  50
  51       if ($type0 == "text") {
  52          // error correcting if they didn't follow RFC standards
  53          if (trim($type1) == "")
  54             $type1 = "plain";
  55
  56          if ($type1 == "plain") {
  57             $msg[0]["PRIORITY"] = 10;
  58             for ($p = 0;$p < count($body);$p++) {
  59                $msg[0]["BODY"][$p] = parsePlainTextMessage($body[$p]);
  60             }
  61          } else if ($type1 == "html") {
  62             $msg[0]["PRIORITY"] = 20;
  63             $msg[0]["BODY"] = $body;
  64          } else {
  65             $msg[0]["PRIORITY"] = 1;
  66             $msg[0]["BODY"][0] = "This entity is of an unknown format.  Doing my best to display anyway...<BR><BR>";
  67             for ($p = 1;$p < count($body);$p++) {
  68                $q = $p - 1;
  69                $msg[0]["BODY"][$p] = $body[$q];
  70             }
  71          }
  72       } else {
  73          $msg[0]["BODY"][0] = "<B><FONT COLOR=DD0000>This attachment is of an unknown format:  $type0/$type1</FONT></B>";
  74       }
  75
  76       return $msg;
  77    }
  78
  79    function formatBody($message) {
  80       for ($i=0; $i < count($message["ENTITIES"]); $i++) {
  81          if ($message["ENTITIES"][$i]["TYPE0"] == "text") {
  82             if ($message["ENTITIES"][$i]["PRIORITY"] > $priority)
  83                $priority = $message["ENTITIES"][$i]["PRIORITY"];
  84          }
  85       }
  86
  87       for ($i = 0; $i < count($message["ENTITIES"]); $i++) {
  88          switch ($priority) {
  89             /** HTML **/
  90             case 20: for ($i=0; $i < count($message["ENTITIES"]); $i++) {
  91                         if (($message["ENTITIES"][$i]["TYPE0"] == "text") && ($message["ENTITIES"][$i]["TYPE1"] == "html")) {
  92                            $body = decodeBody($message["ENTITIES"][$i]["BODY"], $message["ENTITIES"][$i]["ENCODING"]);
  93                         }
  94                      }
  95                      break;
  96             /** PLAIN **/
  97             case 10: for ($i=0; $i < count($message["ENTITIES"]); $i++) {
  98                         if (($message["ENTITIES"][$i]["TYPE0"] == "text") && ($message["ENTITIES"][$i]["TYPE1"] == "plain")) {
  99                            $body = decodeBody($message["ENTITIES"][$i]["BODY"], $message["ENTITIES"][$i]["ENCODING"]);
 100                         }
 101                      }
 102                      break;
 103             /** UNKNOWN...SEND WHAT WE GOT **/
 104             case 1:  for ($i=0; $i < count($message["ENTITIES"]); $i++) {
 105                         if (($message["ENTITIES"][$i]["TYPE0"] == "text")) {
 106                            $pos = count($body);
 107                            for ($b=0; $b < count($message["ENTITIES"][$i]["BODY"]); $b++) {
 108                               $pos = $pos + $b;
 109                               $body[$pos] = $message["ENTITIES"][$i]["BODY"][$b];
 110                            }
 111                         }
 112                      }
 113                      break;
 114          }
 115       }
 116
 117       for ($i = 0; $i < count($message["ENTITIES"]); $i++) {
 118          $pos = count($body);
 119          if ($message["ENTITIES"][$i]["TYPE0"] != "text") {
 120             $body[$pos] = "<BR><TT><U><B>ATTACHMENTS:</B></U></TT><BR>";
 121          }
 122       }
 123
 124       for ($i = 0; $i < count($message["ENTITIES"]); $i++) {
 125          $pos = count($body);
 126          if ($message["ENTITIES"][$i]["TYPE0"] != "text") {
 127             if ($message["ENTITIES"][$i]["TYPE0"] == "image") {
 128                $body[$pos] = "<TT>&nbsp;&nbsp;&nbsp;Image: " . strtoupper($message["ENTITIES"][$i]["TYPE1"]) . "</TT><BR>";
 129             } else {
 130                $body[$pos] = "<TT>&nbsp;&nbsp;&nbsp;Unknown Type: " . $message["ENTITIES"][$i]["TYPE0"] . "/" . $message["ENTITIES"][$i]["TYPE1"] . "</TT><BR>";
 131             }
 132          }
 133       }
 134
 135       return $body;
 136    }
 137
 138    function decodeBody($body, $encoding) {
 139       $encoding = strtolower($encoding);
 140       if ($encoding == "us-ascii") {
 141          $newbody = $body; // if only they all were this easy
 142       } else if ($encoding == "quoted-printable") {
 143          for ($q=0; $q < count($body); $q++) {
 144             if (substr(trim($body[$q]), -1) == "=") {
 145                $body[$q] = trim($body[$q]);
 146                $body[$q] = substr($body[$q], 0, strlen($body[$q])-1);
 147             } else if (substr(trim($body[$q]), -3) == "=20") {
 148                $body[$q] = trim($body[$q]);
 149                $body[$q] = substr($body[$q], 0, strlen($body[$q])-3);
 150                $body[$q] = "$body[$q]\n"; // maybe should be \n.. dunno
 151             }
 152          }
 153          for ($q=0;$q < count($body);$q++) {
 154             $body[$q] = ereg_replace("=3D", "=", $body[$q]);
 155          }
 156          $newbody = $body;
 157       } else {
 158          $newbody = $body;
 159       }
 160       return $newbody;
 161    }
 162 ?>