content

backend blogs {
     .host = "blogs.dev";
     .port = "80";
}

backend remote {
    .host = "proxy.ying";
    .port = "80";
}

 sub vcl_recv {
    set req.backend = remote;	
    if (req.http.host ~ "blogs.dev") {
        #You will need the following line only if your backend has multiple virtual host names
        set req.backend = blogs;
        return (pass);
    }

    set req.http.prehost=req.http.host;
    set req.http.host="proxy.ying";
    return (lookup);
 }

sub vcl_fetch {
	set beresp.ttl = 0s; 
	set beresp.do_esi = true;
}

proxy.php

<?php
$url = (isset($_SERVER['HTTP_PREHOST']) ? $_SERVER['HTTP_PREHOST'] : $_SERVER['HTTP_HOST']) . $_SERVER['REQUEST_URI'];
$url = str_replace('esi=false', 'esi=true', $url);
$url = str_replace('.dev', '.dev:8888', $url);

// echo sprintf('<!--  Reverse Proxy got "%s"-->', $url);
echo curl_get($url, array(), strpos($url, '.com.au') === false ? array() : array(CURLOPT_PROXY => 'localhost:8080'));
// echo sprintf('<!-- // End reverseproxy get of "%s" -->', $url);
/**
 * Send a GET requst using cURL
 * @param string $url to request
 * @param array $get values to send
 * @param array $options for cURL
 * @return string
 */
function curl_get($url, array $get = array(), array $options = array())
{
    $defaults = array(CURLOPT_URL => $url . (strpos($url, '?') === FALSE ? '?' : '') . http_build_query($get), CURLOPT_HEADER => 1, CURLOPT_RETURNTRANSFER => TRUE, CURLOPT_TIMEOUT => 4);

    $ch = curl_init();
    curl_setopt_array($ch, ($options + $defaults));
    if (!$result = curl_exec($ch)) {
        trigger_error(curl_error($ch));
    }
    $status = curl_getinfo($ch);
    list($header, $result) = explode("\r\n\r\n", $result, 2);

    $headers = http_parse_headers($header);
    if (isset($headers['Content-Type'])) {
        header('Content-Type: ' . $headers['Content-Type']);
    }

    curl_close($ch);
    return $result;
}

function http_parse_headers($headers = false)
{
    if ($headers === false) {
        return false;
    }
    $headers = str_replace("\r", "", $headers);
    $headers = explode("\n", $headers);
    foreach ($headers as $value) {
        $header = explode(": ", $value);
        if (isset($header[0]) && !isset($header[1])) {
            $headerdata['status'] = $header[0];
        } elseif ($header[0] && $header[1]) {
            $headerdata[$header[0]] = $header[1];
        }
    }
    return $headerdata;
}
Davids-MacBook-Pro: