includes/ZhClient.php

   1 <?php
   2
   3 /**
   4  * Client for querying zhdaemon
   5  *
   6  */
   7 class ZhClient {
   8         var $mHost, $mPort, $mFP, $mConnected;
   9
  10         /**
  11          * Constructor
  12          *
  13          * @access private
  14          */
  15         function __construct($host, $port) {
  16                 $this->mHost = $host;
  17                 $this->mPort = $port;
  18                 $this->mConnected = $this->connect();
  19         }
  20
  21         /**
  22          * Check if connection to zhdaemon is successful
  23          */
  24         function isconnected() {
  25                 return $this->mConnected;
  26         }
  27
  28         /**
  29          * Establish conncetion
  30          *
  31          * @access private
  32          */
  33         function connect() {
  34                 wfSuppressWarnings();
  35                 $errno = $errstr = '';
  36                 $this->mFP = fsockopen($this->mHost, $this->mPort, $errno, $errstr, 30);
  37                 wfRestoreWarnings();
  38                 if ( !$this->mFP ) {
  39                         return false;
  40                 }
  41                 return true;
  42         }
  43
  44         /**
  45          * Query the daemon and return the result
  46          *
  47          * @access private
  48          */
  49         function query($request) {
  50                 if ( !$this->mConnected ) {
  51                         return false;
  52                 }
  53
  54                 fwrite($this->mFP, $request);
  55
  56                 $result=fgets($this->mFP, 1024);
  57
  58                 list($status, $len) = explode(" ", $result);
  59                 if($status == 'ERROR') {
  60                         //$len is actually the error code...
  61                         print "zhdaemon error $len<br />\n";
  62                         return false;
  63                 }
  64                 $bytesread=0;
  65                 $data='';
  66                 while(!feof($this->mFP) && $bytesread<$len) {
  67                         $str= fread($this->mFP, $len-$bytesread);
  68                         $bytesread += strlen($str);
  69                         $data .= $str;
  70                 }
  71                 //data should be of length $len. otherwise something is wrong
  72                 if ( strlen($data) != $len ) {
  73                         return false;
  74                 }
  75                 return $data;
  76         }
  77
  78         /**
  79          * Convert the input to a different language variant
  80          *
  81          * @param $text string: input text
  82          * @param $tolang string: language variant
  83          * @return string the converted text
  84          */
  85         function convert($text, $tolang) {
  86                 $len = strlen($text);
  87                 $q = "CONV $tolang $len\n$text";
  88                 $result = $this->query($q);
  89                 if ( !$result ) {
  90                         $result = $text;
  91                 }
  92                 return $result;
  93         }
  94
  95         /**
  96          * Convert the input to all possible variants
  97          *
  98          * @param $text string: input text
  99          * @return array langcode => converted_string
 100          */
 101         function convertToAllVariants($text) {
 102                 $len = strlen($text);
 103                 $q = "CONV ALL $len\n$text";
 104                 $result = $this->query($q);
 105                 if ( !$result ) {
 106                         return false;
 107                 }
 108                 list($infoline, $data) = explode('|', $result, 2);
 109                 $info = explode(";", $infoline);
 110                 $ret = array();
 111                 $i=0;
 112                 foreach($info as $variant) {
 113                         list($code, $len) = explode(' ', $variant);
 114                         $ret[strtolower($code)] = substr($data, $i, $len);
 115                         $i+=$len;
 116                 }
 117                 return $ret;
 118         }
 119         /**
 120          * Perform word segmentation
 121          *
 122          * @param $text string: input text
 123          * @return string segmented text
 124          */
 125         function segment($text) {
 126                 $len = strlen($text);
 127                 $q = "SEG $len\n$text";
 128                 $result = $this->query($q);
 129                 if ( !$result ) {// fallback to character based segmentation
 130                         $result = $this->segment($text);
 131                 }
 132                 return $result;
 133         }
 134
 135         /**
 136          * Close the connection
 137          */
 138         function close() {
 139                 fclose($this->mFP);
 140         }
 141 }