Twitch API - 要求auth令牌返回任何内容

I have similar question to this one: Twitch API - can't get auth token using PHP but cannot write a comment.

Tried the code:

    $ch = curl_init("https://api.twitch.tv/kraken/oauth2/token");
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
$fields = array(
    'client_id' => 'blablabla_correct',
    'client_secret' => 'blablabla_also_correct',
    'grant_type' => 'authorization_code',
    'redirect_uri' => 'http://localhost/php/twitch.php',
    'code' => $_GET['code']
);


 curl_setopt($ch, CURLOPT_POSTFIELDS, $fields);
    $data = curl_exec($ch);
print $data;

But it prints nothing. So i tried to debug request using the code from #2:

// to start, just use the code you've already got:
$ch = curl_init("https://api.twitch.tv/kraken/oauth2/token");
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
$fields = array(
    'client_id' => 'blablabla_correct',
    'client_secret' => 'blablabla_also_correct',
    'grant_type' => 'authorization_code',
    'redirect_uri' => 'http://localhost/php/twitch.php',
    'code' => $_GET['code']
);
curl_setopt($ch, CURLOPT_POSTFIELDS, $fields);
$data = curl_exec($ch);

// Now, here we believe the first error comes into play, so let's check it out
print_r($data); // confirm that this is not what we want
$info = curl_getinfo($ch); // let's get some details about that last request
// print it out and see what we get
echo '<pre>';
print_r($info);
echo '</pre>';

And I get following Array. I have no idea what to do next. The API docs are here: https://github.com/justintv/Twitch-API/blob/master/authentication.md#auth-code

Array
(
    [url] => https://api.twitch.tv/kraken/oauth2/token
    [content_type] => 
    [http_code] => 0
    [header_size] => 0
    [request_size] => 0
    [filetime] => -1
    [ssl_verify_result] => 0
    [redirect_count] => 0
    [total_time] => 0.203
    [namelookup_time] => 0
    [connect_time] => 0.203
    [pretransfer_time] => 0
    [size_upload] => 0
    [size_download] => 0
    [speed_download] => 0
    [speed_upload] => 0
    [download_content_length] => -1
    [upload_content_length] => -1
    [starttransfer_time] => 0
    [redirect_time] => 0
    [certinfo] => Array
        (
        )

    [primary_ip] => 192.16.71.172
    [primary_port] => 443
    [local_ip] => 192.168.1.100
    [local_port] => 51603
    [redirect_url] => 
)

i can be wrong but as other login providers, i could imagine that twitch also not allows redirect urls to non existing domains like localhost.

if you want localhost return urls i can prefer this service, where you can point your redirect url to a wildcard server and the request gets redirect to your localhost.

http://xip.io

xip.io is a magic domain name that provides wildcard DNS for any IP address. Say your LAN IP address is 10.0.0.1. Using xip.io,

     10.0.0.1.xip.io            resolves to   10.0.0.1
     www.10.0.0.1.xip.io        resolves to   10.0.0.1    
     mysite.10.0.0.1.xip.io     resolves to   10.0.0.1  
     foo.bar.10.0.0.1.xip.io    resolves to   10.0.0.1