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"] = $filename;
  65
  66       if ($type0 == "text") {
  67          // error correcting if they didn't follow RFC standards
  68          if (trim($type1) == "")
  69             $type1 = "plain";
  70
  71          if ($type1 == "plain") {
  72             for ($p = 0;$p < count($body);$p++) {
  73                $msg[0]["BODY"][$p] = parsePlainTextMessage($body[$p]);
  74             }
  75          } else {
  76             $msg[0]["BODY"] = $body;
  77          }
  78       } else {
  79          $msg[0]["BODY"][0] = $body;
  80       }
  81
  82       return $msg;
  83    }
  84
  85    function containsType($message, $type0, $type1, &$ent_num) {
  86       $type0 = strtolower($type0);
  87       $type1 = strtolower($type1);
  88       for ($i = 0; $i < count($message["ENTITIES"]); $i++) {
  89          /** Check only on type0 **/
  90          if ( $type1 == "any_type" ) {
  91             if ( ($message["ENTITIES"][$i]["TYPE0"] == $type0) ) {
  92                $ent_num = $i;
  93                return true;
  94             }
  95
  96          /** Check on type0 and type1 **/
  97          } else {
  98             if ( ($message["ENTITIES"][$i]["TYPE0"] == $type0) && ($message["ENTITIES"][$i]["TYPE1"] == $type1) ) {
  99                $ent_num = $i;
 100                return true;
 101             }
 102          }
 103       }
 104       return false;
 105    }
 106
 107    function formatBody($message) {
 108       if (containsType($message, "text", "html", $ent_num)) {
 109          $body = decodeBody($message["ENTITIES"][$ent_num]["BODY"], $message["ENTITIES"][$ent_num]["ENCODING"]);
 110       } else if (containsType($message, "text", "plain", $ent_num)) {
 111          $body = decodeBody($message["ENTITIES"][$ent_num]["BODY"], $message["ENTITIES"][$ent_num]["ENCODING"]);
 112       } // add other primary displaying message types here
 113
 114       else {
 115          // find any type that's displayable
 116          if (containsType($message, "text", "any_type", $ent_num)) {
 117             $body = decodeBody($message["ENTITIES"][$ent_num]["BODY"], $message["ENTITIES"][$ent_num]["ENCODING"]);
 118          } else if (containsType($message, "message", "any_type", $ent_num)) {
 119             $body = decodeBody($message["ENTITIES"][$ent_num]["BODY"], $message["ENTITIES"][$ent_num]["ENCODING"]);
 120          }
 121       }
 122
 123
 124       /** Display the ATTACHMENTS: message if there's more than one part **/
 125       if (count($message["ENTITIES"]) > 1) {
 126          $pos = count($body);
 127          $body[$pos] .= "<BR><TT><U><B>ATTACHMENTS:</B></U></TT><BR>";
 128          $num = 0;
 129
 130          for ($i = 0; $i < count($message["ENTITIES"]); $i++) {
 131             /** If we've displayed this entity, go to the next one **/
 132             if ($ent_num == $i)
 133                continue;
 134
 135             $type0 = strtolower($message["ENTITIES"][$i]["TYPE0"]);
 136             $type1 = strtolower($message["ENTITIES"][$i]["TYPE1"]);
 137
 138             $num++;
 139             $filename = $message["ENTITIES"][$i]["FILENAME"];
 140             if (trim($filename) == "") {
 141                $filename = "UNKNOWN_FORMAT_" . time() . $i;
 142                $display_filename = "Attachment $i";
 143             } else {
 144                $display_filename = $filename;
 145             }
 146
 147
 148             $urlMailbox = urlencode($message["INFO"]["MAILBOX"]);
 149             $id = $message["INFO"]["ID"];
 150             $body[$pos] .= "<TT>&nbsp;&nbsp;&nbsp;<A HREF=\"../src/download.php?passed_id=$id&mailbox=$urlMailbox&passed_ent_id=$i\">" . $display_filename . "</A>&nbsp;&nbsp;<SMALL>(TYPE: $type0/$type1)</SMALL></TT><BR>";
 151
 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 = $body;
 177       } else if ($encoding == "base64") {
 178          $newbody = base64_decode($body);
 179       } else {
 180          $newbody = $body;
 181       }
 182       return $newbody;
 183    }
 184 ?>