Get Url

get_url.php

<?php 

$url = @(htmlspecialchars($_GET["url"]));
$key = @(htmlspecialchars($_GET["key"]));
$key2 = @(htmlspecialchars($_GET["key2"]));
$max_age = @mysql_real_escape_string(htmlspecialchars($_GET["max-age"]));
$json = @mysql_real_escape_string(htmlspecialchars($_GET["json"]));
$output = @mysql_real_escape_string(htmlspecialchars($_GET["output"]));

$opts = array('http' =>
    array(
        'method' => 'GET',
        'max_redirects' => '5',
        'ignore_errors' => '1'
    )
);
$context = stream_context_create($opts);


// header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: GET');  
if ($max_age) {
	header("Cache-Control: max-age=$max_age");
}else{
	header("Cache-Control: max-age=600");
}

try {
	if ($url) {

		$html= file_get_contents($url);
		echo $html;

	} elseif ($key || $key2) {
		
		if($key){ // if key belong to old api
			$K= $key;
			$url = "https://docs.google.com/spreadsheet/pub?key=$key&single=true&gid=0&output=csv";
		}else{ // se agrega para la nueva modalidad de exportar la data de google
			$K= $key2;
			$url = "https://docs.google.com/spreadsheets/d/$key2/export?format=csv&id=$key2&gid=0";
		}

		
		if(!ini_set('default_socket_timeout', 200)) echo "<!-- unable to change socket timeout -->";
		// $key = "0Au32Xh0iDeNddDFjV2V0REJ4YXpraDhwMHE2QWVXS1E"; // test
		
		$header = NULL;
		$spreadsheet_data = array();
		if (($handle = fopen($url, 'r', false, $context)) !== FALSE) {

			if ($output == 'csv'){
				header("content-type:application/csv;charset=UTF-8");
				header("Content-Disposition:attachment;filename=\"GS-$K.csv\"");
				echo file_get_contents($url);		
				exit();	
			}

		    while (($data = fgetcsv($handle, 10000000, ",")) !== FALSE) {
				    
				    if ($json || $output == 'json') { // JSON FORMAT
				    	if(!$header)
			                $header = $data;
			            else
			                $spreadsheet_data[] = array_combine($header, $data);
				    }else{ // ARRAY FORMAT

		            	$spreadsheet_data[]=$data;
				    }
		        }

		    fclose($handle);
		    echo json_encode($spreadsheet_data);
		    
		    }

		else
		    echo die("Problem reading csv");

	} else 
		echo "Debe definir una URL o una KEY de Google Spreadsheet";
} catch (Exception $e) {
    echo 'Excepción capturada: ',  $e->getMessage(), "\n";
}