How to use ajax to get other site's title via jquery?

For example, I would like开发者_如何学JAVA to get Google, if I pass the 'www.google.com', but I find that the cross domain call make me do this fail in jquery..... ....Is there any way to solve it? Thank you.

It is possible to do this with ajax and php, ajax request to php file which will get the desired from you url and after that u can use RegExp or other method to get the title from the page content.

PHP Script to fetch the web page content will look like:

<?php
function get_url_contents($url){
        $crl = curl_init();
        $timeout = 5;
        curl_setopt ($crl, CURLOPT_URL,$url);
        curl_setopt ($crl, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt ($crl, CURLOPT_CONNECTTIMEOUT, $timeout);
        $ret = curl_exec($crl);
        curl_close($crl);
        return $ret;
}

header('Content-Type: text/html; charset=utf-8'); // needed to display the right encoding

echo get_url_contents('http://example.com');
//echo file_get_contents('http://example.com');
?>

The only thing who you will need to do is how to get the title from that page.

Regards.

You can make a serversite proxy. Open the url from a local server site file.

I once made one in PHP: proxy.php

<?php
    function content_type($filename) {

        $mime_types = array(

            'txt' => 'text/plain',
            'htm' => 'text/html',
            'html' => 'text/html',
            'php' => 'text/html',
            'css' => 'text/css',
            'js' => 'application/javascript',
            'json' => 'application/json',
            'xml' => 'application/xml',
            'swf' => 'application/x-shockwave-flash',
            'flv' => 'video/x-flv',

            // images
            'png' => 'image/png',
            'jpe' => 'image/jpeg',
            'jpeg' => 'image/jpeg',
            'jpg' => 'image/jpeg',
            'gif' => 'image/gif',
            'bmp' => 'image/bmp',
            'ico' => 'image/vnd.microsoft.icon',
            'tiff' => 'image/tiff',
            'tif' => 'image/tiff',
            'svg' => 'image/svg+xml',
            'svgz' => 'image/svg+xml',

            // archives
            'zip' => 'application/zip',
            'rar' => 'application/x-rar-compressed',
            'exe' => 'application/x-msdownload',
            'msi' => 'application/x-msdownload',
            'cab' => 'application/vnd.ms-cab-compressed',

            // audio/video
            'mp3' => 'audio/mpeg',
            'qt' => 'video/quicktime',
            'mov' => 'video/quicktime',

            // adobe
            'pdf' => 'application/pdf',
            'psd' => 'image/vnd.adobe.photoshop',
            'ai' => 'application/postscript',
            'eps' => 'application/postscript',
            'ps' => 'application/postscript',

            // ms office
            'doc' => 'application/msword',
            'rtf' => 'application/rtf',
            'xls' => 'application/vnd.ms-excel',
            'ppt' => 'application/vnd.ms-powerpoint',

            // open office
            'odt' => 'application/vnd.oasis.opendocument.text',
            'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
        );

        $ext = strtolower(array_pop(explode('.',$filename)));
        if (array_key_exists($ext, $mime_types)) {
            return $mime_types[$ext];
        }
        elseif (function_exists('finfo_open')) {
            $finfo = finfo_open(FILEINFO_MIME);
            $mimetype = finfo_file($finfo, $filename);
            finfo_close($finfo);
            return $mimetype;
        }
        else {
            return 'application/octet-stream';
        }
    }


    // Website url to open
    $daurl = $_SERVER["QUERY_STRING"];

    header("Content-type:" . content_type($daurl));

    // Get that website's content
    $handle = fopen($daurl, "r");

    // If there is something, read and return
    if ($handle) {
        while (!feof($handle)) {
            $buffer = fgets($handle, 4096);
            echo  $buffer;
        }
        fclose($handle);
    }
?>

And then using ajax call like this:

proxy.php?http://www.google.dk/index.html

But but but....

This depends on your server, does it understand PHP and does it allow you to open cross-domain files using PHP?

Else this script is determination the content-type from extension html, php, css, json, etc.

And then you can use jQuery ajax method to receive the content:

var url = "proxy.php?http://www.google.dk/index.html";
$.ajax({
    url: url,
    type: 'get',
    dataType: 'html',
    success: function(data){
        var dom = $(data);
        var title = dom.find("title").text();
    }
});

Hope it helps!

Andreas