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, $type1) {
   9       if ($type0 == "multipart") {
  10          if ($body[0] == "")
  11             $i = 1;
  12          else
  13             $i = 0;
  14
  15          $bound = trim($bound);
  16          $bound = "--$bound";
  17          while ($i < count($body)) {
  18             if (trim($body[$i]) == $bound) {
  19                $j = $i + 1;
  20                $p = 0;
  21
  22                while ((substr(trim($body[$j]), 0, strlen($bound)) != $bound) && (trim($body[$j]) != "")) {
  23                   $entity_header[$p] = $body[$j];
  24                   $j++;
  25                   $p++;
  26                }
  27
  28                fetchEntityHeader($imapConnection, $entity_header, $ent_type0, $ent_type1, $ent_bound, $encoding, $charset, $filename);
  29
  30                if ($ent_type0 == "text") {
  31                   while (substr(trim($body[$j]), 0, strlen($bound)) != $bound) {
  32                      $entity_body[$p] = $body[$j];
  33                      $j++;
  34                      $p++;
  35                   }
  36                } else {
  37                   $j++;
  38                   $entity_body = "";
  39                   while (substr(trim($body[$j]), 0, strlen($bound)) != $bound) {
  40                      $entity_body .= $body[$j];
  41                      $j++;
  42                   }
  43                }
  44                $entity = getEntity($entity_body, $ent_bound, $ent_type0, $ent_type1, $encoding, $charset, $filename);
  45
  46                $q = count($full_message);
  47                $full_message[$q] = $entity[0];
  48             }
  49             $i++;
  50          }
  51       } else {
  52          $full_message = getEntity($body, $bound, $type0, $type1);
  53       }
  54
  55       return $full_message;
  56    }
  57
  58    /** This gets one entity's properties **/
  59    function getEntity($body, $bound, $type0, $type1, $encoding, $charset, $filename) {
  60       $msg[0]["TYPE0"] = $type0;
  61       $msg[0]["TYPE1"] = $type1;
  62       $msg[0]["ENCODING"] = $encoding;
  63       $msg[0]["CHARSET"] = $charset;
  64       $msg[0]["FILENAME"] = $filename;
  65
  66       echo "$type0 / $type1<BR>";
  67       if ($type0 == "text") {
  68          // error correcting if they didn't follow RFC standards
  69          if (trim($type1) == "")
  70             $type1 = "plain";
  71
  72          if ($type1 == "plain") {
  73             $msg[0]["PRIORITY"] = 10;
  74             for ($p = 0;$p < count($body);$p++) {
  75                $msg[0]["BODY"][$p] = parsePlainTextMessage($body[$p]);
  76             }
  77          } else if ($type1 == "html") {
  78             $msg[0]["PRIORITY"] = 20;
  79             $msg[0]["BODY"] = $body;
  80          } else {
  81             $msg[0]["PRIORITY"] = 1;
  82             $msg[0]["BODY"][0] = "This entity is of an unknown format.  Doing my best to display anyway...<BR><BR>";
  83             for ($p = 1;$p < count($body);$p++) {
  84                $q = $p - 1;
  85                $msg[0]["BODY"][$p] = $body[$q];
  86             }
  87          }
  88       } else {
  89          $msg[0]["PRIORITY"] == 5;
  90          $msg[0]["BODY"][0] = $body;
  91       }
  92
  93       return $msg;
  94    }
  95
  96    function formatBody($message) {
  97       for ($i=0; $i < count($message["ENTITIES"]); $i++) {
  98          if ($message["ENTITIES"][$i]["TYPE0"] == "text") {
  99             if ($message["ENTITIES"][$i]["PRIORITY"] > $priority)
 100                $priority = $message["ENTITIES"][$i]["PRIORITY"];
 101          }
 102       }
 103
 104       for ($i = 0; $i < count($message["ENTITIES"]); $i++) {
 105          switch ($priority) {
 106             /** HTML **/
 107             case 20: for ($i=0; $i < count($message["ENTITIES"]); $i++) {
 108                         if (($message["ENTITIES"][$i]["TYPE0"] == "text") && ($message["ENTITIES"][$i]["TYPE1"] == "html")) {
 109                            $body = decodeBody($message["ENTITIES"][$i]["BODY"], $message["ENTITIES"][$i]["ENCODING"]);
 110                         }
 111                      }
 112                      break;
 113             /** PLAIN **/
 114             case 10: for ($i=0; $i < count($message["ENTITIES"]); $i++) {
 115                         if (($message["ENTITIES"][$i]["TYPE0"] == "text") && ($message["ENTITIES"][$i]["TYPE1"] == "plain")) {
 116                            $body = decodeBody($message["ENTITIES"][$i]["BODY"], $message["ENTITIES"][$i]["ENCODING"]);
 117                         }
 118                      }
 119                      break;
 120             /** UNKNOWN...SEND WHAT WE GOT **/
 121             case 1:  for ($i=0; $i < count($message["ENTITIES"]); $i++) {
 122                         if (($message["ENTITIES"][$i]["TYPE0"] == "text")) {
 123                            $pos = count($body);
 124                            for ($b=0; $b < count($message["ENTITIES"][$i]["BODY"]); $b++) {
 125                               $pos = $pos + $b;
 126                               $body[$pos] = $message["ENTITIES"][$i]["BODY"][$b];
 127                            }
 128                         }
 129                      }
 130                      break;
 131          }
 132       }
 133
 134       for ($i = 0; $i < count($message["ENTITIES"]); $i++) {
 135          $pos = count($body);
 136          if ($message["ENTITIES"][$i]["TYPE0"] != "text") {
 137             $body[$pos] = "<BR><TT><U><B>ATTACHMENTS:</B></U></TT><BR>";
 138             $i = count($message["ENTITIES"]);
 139          }
 140       }
 141
 142       for ($i = 0; $i < count($message["ENTITIES"]); $i++) {
 143          $pos = count($body);
 144          if (($message["ENTITIES"][$i]["TYPE0"] == "image") || ($message["ENTITIES"][$i]["TYPE0"] == "application")){
 145             $filename = $message["ENTITIES"][$i]["FILENAME"];
 146             $body[$pos] = "<TT>&nbsp;&nbsp;&nbsp;<A HREF=\"../data/$filename\">" . $filename . "</A></TT><BR>";
 147
 148             $file = fopen("../data/$filename", "w");
 149             $image = base64_decode($message["ENTITIES"][$i]["BODY"][0]);
 150             fwrite($file, $image);
 151             fclose($file);
 152          }
 153       }
 154
 155       return $body;
 156    }
 157
 158    function decodeBody($body, $encoding) {
 159       $encoding = strtolower($encoding);
 160       if ($encoding == "us-ascii") {
 161          $newbody = $body; // if only they all were this easy
 162       } else if ($encoding == "quoted-printable") {
 163          for ($q=0; $q < count($body); $q++) {
 164             if (substr(trim($body[$q]), -1) == "=") {
 165                $body[$q] = trim($body[$q]);
 166                $body[$q] = substr($body[$q], 0, strlen($body[$q])-1);
 167             } else if (substr(trim($body[$q]), -3) == "=20") {
 168                $body[$q] = trim($body[$q]);
 169                $body[$q] = substr($body[$q], 0, strlen($body[$q])-3);
 170                $body[$q] = "$body[$q]\n"; // maybe should be \n.. dunno
 171             }
 172          }
 173          for ($q=0;$q < count($body);$q++) {
 174             $body[$q] = ereg_replace("=3D", "=", $body[$q]);
 175          }
 176          $newbody = $body;
 177       } else {
 178          $newbody = $body;
 179       }
 180       return $newbody;
 181    }
 182 ?>