ppdemo_gf_external

<?php

// private labels GlobiFlow external link flow on your own domain
// eg https://workflow-automation.podio.com/external.php?id=xxxxxxxxx
// expects to be in a sub-directory /gf and called the same way
// eg http://yourdomain.com/gf/?id=xxxxxxxx

// make sure the server supports CURL
if ( ! function_exists("curl_init") ) die("This server does not support CURL");

// direct call - ajax not set - show template page
if ( ! isset($_GET['ajax']) ) {
    include(__DIR__."/page.html");
    $id = (isset($_GET['id'])?(urlencode($_GET['id'])):(""));
    echo '<noscript>';
    echo '<p>This site requires Javascript. Else <a href="http://https://workflow-automation.podio.com/external.php?id='.$id.'">click here</a>.</p>';
    echo '</noscript>';
    echo '<script>';
    echo 'Http = new XMLHttpRequest();';
    echo 'xnow = new Date().getTime();';
    echo 'url="/gf/?ajax=1&id='.$id.'&cb="+xnow;'; // cb is for cache busting because some nginx hosts auto-cache
    echo 'Http.open("GET", url);';
    echo 'Http.send();';
    echo 'Http.onreadystatechange=(e)=>{';
    echo '  document.getElementById("gfcontent").innerHTML = Http.responseText';
    echo '}';
    echo '</script>';
    exit();
}

// ajax flag has been passed so fetch the page from GF
if ( ! isset($_GET['id']) || empty($_GET['id']) ) {
    $msg = "<p>Error: Invalid Link</p>";
} else {
    $url = "https://workflow-automation.podio.com/external.php?id=".$_GET['id'];
    $ret = curl_get_url($url);
    $msg = preg_replace('/.*?\("foo"\)[^<]*<\/script>/ism', '', $ret);
    $msg = preg_replace('/<div[^>]*>Powered by\s*<a [^>]*>Citrix Podio.*/ism', '', $msg);
    if ( empty($msg) ) $msg = '<p>Ooops - something unexpected went wrong.</p><script>console.log('.json_encode($ret).');</script>';
    else $msg = '<div>' . $msg; // above get_between leaves a closing div on end
}

// output result
echo $msg;
exit();

// some helper functions below

function curl_get_url($url) {
    $crl = curl_init();
    curl_setopt ($crl, CURLOPT_URL, $url);
    curl_setopt ($crl, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt ($crl, CURLOPT_CONNECTTIMEOUT, 30);
    curl_setopt ($crl, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.13) Gecko/20080311 Firefox/2.0.0.13');
    $ret = curl_exec($crl);
    if ( curl_errno($crl) ) {
        die("CURL ERROR " . curl_errno($crl) . " - " . curl_error($crl));
    }
    curl_close($crl);
    return $ret;
}