functions/mime.php

   1 <?
   2    /** mime.php
   3     **
   4     ** This contains the functions necessary to detect and decode MIME messages.
   5     **/
   6
   7
   8    /** This is the first function called.  It decides if this is a multipart
   9        message or if it should be handled as a single entity
  10     **/
  11    function decodeMime($body, $bound, $type0, $type1, &$entities) {
  12       if ($type0 == "multipart") {
  13          $bound = trim($bound);
  14          while (($i < count($body)) && (substr($body[$i], 0, strlen("--$bound--")) != "--$bound--")) {
  15             if (trim($body[$i]) == "--$bound") {
  16                $j = $i+1;
  17                $p = 0;
  18
  19                /** Lets find the header for this entity **/
  20                /** If the first line after the boundary is blank, we use default values **/
  21                if (trim($body[$j]) == "") {
  22                   $ent_type0 = "text";
  23                   $ent_type1 = "plain";
  24                   $charset = "us-ascii";
  25                   $j++;
  26                /** If the first line ISNT blank, read in the header for this entity **/
  27                } else {
  28                   while ((substr(trim($body[$j]), 0, strlen("--$bound")) != "--$bound") && (trim($body[$j]) != "")) {
  29                      $entity_header[$p] = $body[$j];
  30                      $j++;
  31                      $p++;
  32                   }
  33                   /** All of these values are getting passed back to us **/
  34                   fetchEntityHeader($imapConnection, $entity_header, $ent_type0, $ent_type1, $ent_bound, $encoding, $charset, $filename);
  35                }
  36
  37
  38                /** OK, we have the header information, now lets decide what to do with it **/
  39                if ($ent_type0 == "multipart") {
  40                   $y = 0;
  41                   while (substr($body[$j], 0, strlen("--$bound--")) != "--$bound--") {
  42                      $ent_body[$y] = $body[$j];
  43                      $y++;
  44                      $j++;
  45                   }
  46                   $ent = decodeMime($ent_body, $ent_bound, $ent_type0, $ent_type1, $entities);
  47                   $entities = $ent;
  48                } else {
  49                   $j++;
  50                   $entity_body = "";
  51                   while (substr(trim($body[$j]), 0, strlen("--$bound")) != "--$bound") {
  52                      $entity_body .= $body[$j];
  53                      $j++;
  54                   }
  55                   $count = count($entities);
  56                   $entities[$count] = getEntity($entity_body, $ent_bound, $ent_type0, $ent_type1, $encoding, $charset, $filename);
  57                }
  58             }
  59             $i++;
  60          }
  61       } else {
  62          /** If this isn't a multipart message **/
  63          $j = 0;
  64          $entity_body = "";
  65          while ((substr(trim($body[$j]), 0, strlen("--$bound")) != "--$bound") && ($j < count($body))) {
  66             $entity_body .= $body[$j];
  67             $j++;
  68          }
  69
  70          $count = count($entities);
  71          $entities[$count] = getEntity($entity_body, $bound, $type0, $type1, $encoding, $charset, $filename);
  72       }
  73
  74       return $entities;
  75    }
  76
  77    /** This gets one entity's properties **/
  78    function getEntity($body, $bound, $type0, $type1, $encoding, $charset, $filename) {
  79       $msg["TYPE0"] = $type0;
  80       $msg["TYPE1"] = $type1;
  81       $msg["ENCODING"] = $encoding;
  82       $msg["CHARSET"] = $charset;
  83       $msg["FILENAME"] = $filename;
  84
  85       $msg["BODY"] = $body;
  86
  87       return $msg;
  88    }
  89
  90    /** This will check whether or not the message contains a certain type.  It
  91        searches through all the entities for a match.
  92     **/
  93    function containsType($message, $type0, $type1, &$ent_num) {
  94       $type0 = strtolower($type0);
  95       $type1 = strtolower($type1);
  96       for ($i = 0; $i < count($message["ENTITIES"]); $i++) {
  97          /** Check only on type0 **/
  98          if ( $type1 == "any_type" ) {
  99             if ( ($message["ENTITIES"][$i]["TYPE0"] == $type0) ) {
 100                $ent_num = $i;
 101                return true;
 102             }
 103
 104          /** Check on type0 and type1 **/
 105          } else {
 106             if ( ($message["ENTITIES"][$i]["TYPE0"] == $type0) && ($message["ENTITIES"][$i]["TYPE1"] == $type1) ) {
 107                $ent_num = $i;
 108                return true;
 109             }
 110          }
 111       }
 112       return false;
 113    }
 114
 115    /** This returns a parsed string called $body.  That string can then be displayed
 116        as the actual message in the HTML.   It contains everything needed, including
 117        HTML Tags, Attachments at the bottom, etc.
 118     **/
 119    function formatBody($message) {
 120       include ("../config/config.php");
 121
 122       /** this if statement checks for the entity to show as the primary message.  To
 123           add more of them, just put them in the order that is their priority.
 124        **/
 125       $id = $message["INFO"]["ID"];
 126       $urlmailbox = urlencode($message["INFO"]["MAILBOX"]);
 127       $body = "";
 128
 129       if (containsType($message, "text", "html", $ent_num)) {
 130          $body .= decodeBody($message["ENTITIES"][$ent_num]["BODY"], $message["ENTITIES"][$ent_num]["ENCODING"]);
 131       } else if (containsType($message, "text", "plain", $ent_num)) {
 132          $tmpbody = decodeBody($message["ENTITIES"][$ent_num]["BODY"], $message["ENTITIES"][$ent_num]["ENCODING"]);
 133          $body .= "<TT>" . nl2br($tmpbody) . "</TT>";
 134       }
 135       // add other primary displaying message types here
 136       else {
 137          // find any type that's displayable
 138          if (containsType($message, "text", "any_type", $ent_num)) {
 139             $tmpbody = decodeBody($message["ENTITIES"][$ent_num]["BODY"], $message["ENTITIES"][$ent_num]["ENCODING"]);
 140             $body .= "<TT>" . nl2br($tmpbody) . "</TT>";
 141          } else if (containsType($message, "message", "any_type", $ent_num)) {
 142             $tmpbody = decodeBody($message["ENTITIES"][$ent_num]["BODY"], $message["ENTITIES"][$ent_num]["ENCODING"]);
 143             $body .= "<TT>" . nl2br($tmpbody) . "</TT>";
 144          }
 145       }
 146
 147       $body .= "<BR><SMALL><CENTER><A HREF=\"../src/download.php?absolute_dl=true&passed_id=$id&passed_ent_id=$ent_num&mailbox=$urlmailbox\">Download this as a file</A></CENTER><BR></SMALL>";
 148
 149       /** Display the ATTACHMENTS: message if there's more than one part **/
 150       if (count($message["ENTITIES"]) > 1) {
 151          $body .= "<TABLE WIDTH=100% CELLSPACING=0 CELLPADDING=4 BORDER=0><TR><TD BGCOLOR=\"$color[0]\">";
 152          $body .= "<TT><B>ATTACHMENTS:</B></TT>";
 153          $body .= "</TD></TR><TR><TD BGCOLOR=\"$color[0]\">";
 154          $num = 0;
 155
 156          for ($i = 0; $i < count($message["ENTITIES"]); $i++) {
 157             /** If we've displayed this entity, go to the next one **/
 158             if ($ent_num == $i)
 159                continue;
 160
 161             $type0 = strtolower($message["ENTITIES"][$i]["TYPE0"]);
 162             $type1 = strtolower($message["ENTITIES"][$i]["TYPE1"]);
 163
 164             $num++;
 165             $filename = $message["ENTITIES"][$i]["FILENAME"];
 166             if (trim($filename) == "") {
 167                $display_filename = "untitled$i";
 168             } else {
 169                $display_filename = $filename;
 170             }
 171
 172             $urlMailbox = urlencode($message["INFO"]["MAILBOX"]);
 173             $id = $message["INFO"]["ID"];
 174             $body .= "<TT>&nbsp;&nbsp;&nbsp;<A HREF=\"../src/download.php?passed_id=$id&mailbox=$urlMailbox&passed_ent_id=$i\">" . $display_filename . "</A>&nbsp;&nbsp;<SMALL>(TYPE: $type0/$type1)</SMALL></TT><BR>";
 175          }
 176          $body .= "</TD></TR></TABLE>";
 177       }
 178       return $body;
 179    }
 180
 181
 182
 183    /** this function decodes the body depending on the encoding type. **/
 184    function decodeBody($body, $encoding) {
 185       $encoding = strtolower($encoding);
 186
 187       if ($encoding == "us-ascii") {
 188          $newbody = $body; // if only they all were this easy
 189
 190       } else if ($encoding == "quoted-printable") {
 191          echo "$body";
 192          $body = ereg_replace("=3D", "=", $body);
 193          $body = ereg_replace("=\n", "", $body);
 194          $body = ereg_replace("=20", "\n", $body);
 195          $newbody= $body;
 196
 197       } else if ($encoding == "base64") {
 198          $newbody = base64_decode($body);
 199
 200       } else {
 201          $newbody = $body;
 202       }
 203       return $newbody;
 204    }
 205 ?>