PHP Proxy Server and Calling JSON? - php

Question

Ok I am trying to access some JSON using a PHP proxy as I have been told is the only way to do a cross domain access when you don't control the sites policies.
Here is the code below I am trying to use as a php proxy as shared by a fellow stackoverflow user:
function curl_download($Url){
// is cURL installed yet?
if (!function_exists('curl_init')){
die('Sorry cURL is not installed!');
}
// OK cool - then let's create a new cURL resource handle
$ch = curl_init();
// Now set some options (most are optional)
// Set URL to download
curl_setopt($ch, CURLOPT_URL, $Url);
// Set a referer
curl_setopt($ch, CURLOPT_REFERER, "http://www.example.org/yay.htm");
// User agent
curl_setopt($ch, CURLOPT_USERAGENT, "MozillaXYZ/1.0");
// Include header in result? (0 = yes, 1 = no)
curl_setopt($ch, CURLOPT_HEADER, 0);
// Should cURL return or print out the data? (true = return, false = print)
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
// Timeout in seconds
curl_setopt($ch, CURLOPT_TIMEOUT, 10);
// Download the given URL, and return output
$output = curl_exec($ch);
// Close the cURL resource, and free system resources
curl_close($ch);
return $output;
}
problem is when I replace $URL with http://www.nfl.com/liveupdate/scorestrip/ss.json nothing seems to happen. I am not really sure how to use this PHP proxy though either as I don't ever do this type of thing.
Am I suppose to create this in a seperate php file and then send a request to this code? I am kind of against the wall on what exactly to do here to make it so I can access the json from the site above.

Answer 1

Am I suppose to create this in a seperate php file and then send a request to this code?
Yes. The code above should resend your request made from JS to a remote service on another domain. Which is what does the trick - enables crossdomain POST requests from JS.
<?php
$server_url = "http://example.com/";
$options = array
(
CURLOPT_HEADER => true,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_TIMEOUT => 60,
CURLOPT_CONNECTTIMEOUT => 0,
CURLOPT_HTTPGET => 1
);
$service = $_GET["service"];
$request_headers = Array();
foreach($_SERVER as $i=>$val) {
if (strpos($i, 'HTTP_') === 0) {
$name = str_replace(array('HTTP_', '_'), array('', '-'), $i);
if ($name != 'HOST')
{
$request_headers[] = "{$name}: {$val}";
}
}
}
$options[CURLOPT_HTTPHEADER] = $request_headers;
switch (strtolower($_SERVER["REQUEST_METHOD"]))
{
case "post":
$options[CURLOPT_POST] = true;
$url = "{$server_url}/services/".$service;
$options[CURLOPT_POSTFIELDS] = file_get_contents("php://input");
break;
case "get":
unset($_GET["service"]);
$querystring = "";
$first = true;
foreach ($_GET as $key => $val)
{
if (!$first) $querystring .= "&";
$querystring .= $key."=".$val;
$first = false;
}
$url = "{$server_url}/services/".$service."?".$querystring;
break;
default:
throw new Exception("Unsupported request method.");
break;
}
$options[CURLOPT_URL] = $url;
$curl_handle = curl_init();
curl_setopt_array($curl_handle,$options);
$server_output = curl_exec($curl_handle);
curl_close($curl_handle);
$response = explode("\r\n\r\n",$server_output);
$headers = explode("\r\n",$response[0]);
foreach ($headers as $header)
{
if ( !preg_match(';^transfer-encoding:;ui', Trim($header)) )
{
header($header);
}
}
echo $response[1];
This is a slightly modified version of the script I use, unfortunately not well documented.
Hope it helps.

Answer 2

I would suggest using Ben Almans Simple PHP Proxy
Simple PHP Proxy