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Programming

PHP CLI and Google Translation

    Harry Fuecks
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    Just been doing some heavy translation from German to English. Which lead to writing a simple command line tool for translating via Google – waste time to save time in other words. Getting a prototype up from scratch took about 15 minutes (which sheds a light on blog spam I guess). Have cleaned it up a bit and dropping it here in case anyone can use it.

    Two major things that still need doing;

    – validation of the language pair CLI option, to keep users sane

    – character set conversion – right now getting UFT8 from Google so XML_HTMLSax can parse correctly (it relies on the str_ functions) but not doing anything clever after that.

    …and there’s probably a bug or three.


    #!/usr/local/bin/php
    http://www.php.net/license/3_0.txt
    */
    //------------------------------------------------------------------------------
    require_once 'Console/Getopt.php';
    require_once 'HTTP/Request.php';
    require_once 'XML/HTMLSax3.php';

    //------------------------------------------------------------------------------
    class Google_Translate {

    var $langpair;
    var $proxy = null;

    function Google_Translate($langpair, $proxy = null) {

    $this->langpair = $langpair;
    $this->proxy = $proxy;

    }

    function query($text) {
    $R = & new HTTP_Request('http://translate.google.com/translate_t');
    $R->setMethod('POST');

    if ( !is_null($this->proxy) ) {
    $pxy = parse_url($this->proxy);
    $R->setProxy($pxy['host'],$pxy['port'],$pxy['user'],$pxy['pass']);
    }

    $R->addPostData('text', utf8_encode($text));
    $R->addPostData('langpair', $this->langpair);
    $R->addPostData('ie','UTF8');
    $R->addPostData('oe','UTF8');

    $res = $R->sendRequest();

    if ( PEAR::isError($res) ) {
    fwrite(STDERR, "Connection problem: ".$res->toString()."n");
    exit(1);
    }

    if ($R->getResponseCode() != '200') {
    fwrite(STDOUT, "Invalid HTTP Status: ".$R->getResponseCode()."n");
    exit(1);
    }

    return $R->getResponseBody();
    }

    function translate($text) {
    $P = & new Google_Translate_Parser();
    return $P->parse($this->query($text));
    }
    }

    //------------------------------------------------------------------------------
    class Google_Translate_Parser {

    var $inResult = FALSE;
    var $result = '';

    function open($p, $tag, $attrs) {
    if ( $tag == 'textarea' && isset($attrs['name']) && $attrs['name'] == 'q' ) {
    $this->inResult = TRUE;
    }
    }

    function close($p, $tag) {
    if ( $this->inResult && $tag == 'textarea' ) {
    $this->inResult = FALSE;
    }
    }

    function data($p, $data) {
    if ( $this->inResult ) {
    $this->result .= $data;
    }
    }

    function parse($html) {

    $P = & new XML_HTMLSax3();
    $P->set_object($this);
    $P->set_element_handler('open','close');
    $P->set_data_handler('data');
    $P->parse($html);

    return utf8_decode($this->result);
    }
    }

    //------------------------------------------------------------------------------
    function usage() {
    $usage = <<getMessage()."n");
    exit(1);
    }

    if ( realpath($_SERVER['argv'][0]) == __FILE__ ) {
    $options = Console_Getopt::getOpt($args,'hl:p:');
    } else {
    $options = Console_Getopt::getOpt2($args,'hl:p:');
    }

    if ( PEAR::isError($options) ) {
    fwrite(STDERR,$options->getMessage()."n");
    usage();
    }

    $proxy = null;

    foreach ( $options[0] as $option ) {
    switch ( $option[0] ) {
    case 'h':
    usage();
    break;

    case 'l':
    $lang = str_replace('-','|',$option[1]);
    break;

    case 'p':
    $proxy = $option[1];
    break;
    }
    }

    $G = & new Google_Translate($lang, $proxy);
    echo $G->translate($options[1][0])."n";
    exit(0);