function makeRequest($url)
{
//Tell cURL to make the request using the brower's user-agent if there is one, or a fallback user-agent otherwise.
$user_agent = $_SERVER["HTTP_USER_AGENT"];
if (empty($user_agent)) {
$user_agent = "Mozilla/5.0 (compatible; miniProxy)";
}
$ch = curl_init();
curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);
//Get ready to proxy the browser's request headers...
$browserRequestHeaders = getallheaders();
//...but let cURL set some headers on its own.
removeKeys($browserRequestHeaders, array("Host", "Content-Length", "Accept-Encoding"));
curl_setopt($ch, CURLOPT_ENCODING, "");
//Transform the associative array from getallheaders() into an
//indexed array of header strings to be passed to cURL.
$curlRequestHeaders = array();
foreach ($browserRequestHeaders as $name => $value) {
$curlRequestHeaders[] = $name . ": " . $value;
}
curl_setopt($ch, CURLOPT_HTTPHEADER, $curlRequestHeaders);
//Proxy any received GET/POST/PUT data.
switch ($_SERVER["REQUEST_METHOD"]) {
case "POST":
curl_setopt($ch, CURLOPT_POST, true);
//For some reason, $HTTP_RAW_POST_DATA isn't working as documented at
//http://php.net/manual/en/reserved.variables.httprawpostdata.php
//but the php://input method works. This is likely to be flaky
//across different server environments.
//More info here: http://stackoverflow.com/questions/8899239/http-raw-post-data-not-being-populated-after-upgrade-to-php-5-3
curl_setopt($ch, CURLOPT_POSTFIELDS, file_get_contents("php://input"));
break;
case "PUT":
curl_setopt($ch, CURLOPT_PUT, true);
curl_setopt($ch, CURLOPT_INFILE, fopen("php://input"));
break;
}
//Other cURL options.
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FAILONERROR, true);
//Set the request URL.
curl_setopt($ch, CURLOPT_URL, $url);
//Make the request.
$response = curl_exec($ch);
$responseInfo = curl_getinfo($ch);
$headerSize = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
curl_close($ch);
//Setting CURLOPT_HEADER to true above forces the response headers and body
//to be output together--separate them.
$responseHeaders = substr($response, 0, $headerSize);
$responseBody = substr($response, $headerSize);
return array("headers" => $responseHeaders, "body" => $responseBody, "responseInfo" => $responseInfo);
}
function removeKeys(array $array)
{
$array = array_values($array);
foreach ($array as &$value) {
if (is_array($value)) {
$value = removeKeys($value);
}
}
return $array;
}
