Finally! Google Plus status updater is here :) It is written in PHP, so it should be cross platform, which is a plus ;) It needs the curl extension to work though. Well, the bot can log into your Google account and update your Google Plus status, but I’m sure you can extend it to other Google products. All this is done without Google API, OAuth, tokens or any other annoying products. Post your comments, improvements and feature request below.

Download: gplus-bot

<?php

/**
 * Google+ (plus.google.com) PHP Curl bot
 * @since Sep 29 2011
 * @version 15.12.2011
 * @link http://360percents.com/
 * @author Luka Pušić <luka@pusic.si>
 */
/**
 * REQUIRED PARAMETERS
 */
$status = 'testzzz';
$email = 'your@email.com';
$pass = 'yourpassw0rd';

/**
 * OPTIONAL PARAMETERS
 * sleeptime is an optional timeout parameter which makes us look less suspicious to Google
 * Enter pageid if you want to post to a page.
 */
$pageid = false;
$cookies = 'cookie.txt';
$sleeptime = 0;
$uagent = 'Mozilla/4.0 (compatible; MSIE 5.0; S60/3.0 NokiaN73-1/2.0(2.0617.0.0.7) Profile/MIDP-2.0 Configuration/CLDC-1.1)';
$pc_uagent = 'Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20100101 Firefox/7.0.1';
$debug = FALSE;

function tidy($str) {
    return rtrim($str, "&");
}

/**
 * Handle cookie file
 */
@unlink($cookies); //delete previous cookie file if exists
touch($cookies); //create a cookie file

/**
 * MAIN BLOCK
 * login_data() just collects login form info
 * login($postdata) logs you in and you can do pretty much anything you want from here on
 */
login(login_data());
sleep($sleeptime);
if ($pageid) {
    update_page_status();
} else {
    update_profile_status();
} //update status with $GLOBAL['status'];
sleep($sleeptime);
logout(); //optional - log out

/**
 * 1. GET: http://plus.google.com/
 * Parse the webpage and collect form data
 * @return array (string postdata, string postaction)
 */
function login_data() {
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_COOKIEJAR, $GLOBALS['cookies']);
    curl_setopt($ch, CURLOPT_USERAGENT, $GLOBALS['uagent']);
    curl_setopt($ch, CURLOPT_URL, "https://plus.google.com/");
    curl_setopt($ch, CURLOPT_COOKIEFILE, $GLOBALS['cookies']);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);

    $buf = utf8_decode(html_entity_decode(curl_exec($ch)));
    $buf = str_replace( '&', '&', $buf ); // just in case any correctly encoded
    $buf = str_replace( '&', '&', $buf ); // now encode them all again
    curl_close($ch);

    echo "\n[+] Sending GET request to: https://plus.google.com/\n\n";

    $toreturn = '';

    $doc = new DOMDocument;
    $doc->loadxml($buf);
    $inputs = $doc->getElementsByTagName('input');
    foreach ($inputs as $input) {
	switch ($input->getAttribute('name')) {
	    case 'Email':
		$toreturn .= 'Email=' . urlencode($GLOBALS['email']) . '&';
		break;
	    case 'Passwd':
		$toreturn .= 'Passwd=' . urlencode($GLOBALS['pass']) . '&';
		break;
	    default:
		$toreturn .= $input->getAttribute('name') . '=' . urlencode($input->getAttribute('value')) . '&';
	}
    }
    return array(tidy($toreturn), $doc->getElementsByTagName('form')->item(0)->getAttribute('action'));
}

/**
 * 2. POST login: https://accounts.google.com/ServiceLoginAuth
 */
function login($postdata) {

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_COOKIEJAR, $GLOBALS['cookies']);
    curl_setopt($ch, CURLOPT_COOKIEFILE, $GLOBALS['cookies']);
    curl_setopt($ch, CURLOPT_USERAGENT, $GLOBALS['uagent']);
    curl_setopt($ch, CURLOPT_URL, $postdata[1]);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $postdata[0]);
    $buf = curl_exec($ch); #this is not the g+ home page, because the b**** doesn't redirect properly
    curl_close($ch);
    if ($GLOBALS['debug']) {
	echo $buf;
    }

    echo "\n[+] Sending POST request to: " . $postdata[1] . "\n\n";
}

/**
 * 3. GET status update form:
 * Parse the webpage and collect form data
 */
function update_profile_status() {

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_COOKIEJAR, $GLOBALS['cookies']);
    curl_setopt($ch, CURLOPT_COOKIEFILE, $GLOBALS['cookies']);
    curl_setopt($ch, CURLOPT_USERAGENT, $GLOBALS['uagent']);
    curl_setopt($ch, CURLOPT_URL, 'https://m.google.com/app/plus/?v=compose&group=m1c&hideloc=1');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    $buf = utf8_decode(html_entity_decode(str_replace('&', '', curl_exec($ch))));
    $header = curl_getinfo($ch);
    curl_close($ch);
    if ($GLOBALS['debug']) {
	echo $buf;
    }

    $params = '';
    $doc = new DOMDocument;
    $doc->loadxml($buf);
    $inputs = $doc->getElementsByTagName('input');
    foreach ($inputs as $input) {
	if (($input->getAttribute('name') != 'editcircles')) {
	    $params .= $input->getAttribute('name') . '=' . urlencode($input->getAttribute('value')) . '&';
	}
    }
    $params .= 'newcontent=' . urlencode($GLOBALS['status']);
    //$baseurl = $doc->getElementsByTagName('base')->item(0)->getAttribute('href');
    $baseurl = 'https://m.google.com' . parse_url($header['url'], PHP_URL_PATH);

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_COOKIEJAR, $GLOBALS['cookies']);
    curl_setopt($ch, CURLOPT_COOKIEFILE, $GLOBALS['cookies']);
    curl_setopt($ch, CURLOPT_USERAGENT, $GLOBALS['uagent']);
    //delete group=b0& in the line below, to post just to your circles, not to public
    curl_setopt($ch, CURLOPT_URL, $baseurl . '?v=compose&group=m1c&group=b0&hideloc=1&a=post');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_REFERER, $baseurl . '?v=compose&group=m1c&group=b0&hideloc=1');
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
    $buf = curl_exec($ch);
    $header = curl_getinfo($ch);
    curl_close($ch);
    if ($GLOBALS['debug']) {
	echo $buf;
    }

    echo "\n[+] POST Updating status on: " . $baseurl . "\n\n";
}

/**
 * Not implemented yet!
 * just ignore this function for now
 */
function update_page_status() {

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_COOKIEJAR, $GLOBALS['cookies']);
    curl_setopt($ch, CURLOPT_COOKIEFILE, $GLOBALS['cookies']);
    curl_setopt($ch, CURLOPT_USERAGENT, $GLOBALS['pc_uagent']);
    curl_setopt($ch, CURLOPT_URL, 'https://plus.google.com/u/0/b/' . $GLOBALS['pageid'] . '/');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    $buf = utf8_decode(html_entity_decode(str_replace('&', '', curl_exec($ch))));
    curl_close($ch);
    if ($GLOBALS['debug']) {
	echo $buf;
    }
}

/**
 * 3. GET logout:
 * Just logout to look more human like and reset cookie :)
 */
function logout() {
    echo "\n[+] GET Logging out: \n\n";
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_COOKIEJAR, $GLOBALS['cookies']);
    curl_setopt($ch, CURLOPT_COOKIEFILE, $GLOBALS['cookies']);
    curl_setopt($ch, CURLOPT_USERAGENT, $GLOBALS['uagent']);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_URL, 'https://www.google.com/m/logout');
    $buf = curl_exec($ch);
    curl_close($ch);
    if ($GLOBALS['debug']) {
	echo $buf;
    }
}

?>