Failing to get yahoo access token - php

Question

Recently, I'm developing my site with social networking, and want to import gmail,yahoo,hotmail etc.. contacts.
I have already grabbed contacts from Gmail and now next want to do the same with Yahoo. Reading the Yahoo documentation and following my gmail code, I get the authorisation screen and get the auth code back, but unable to get the access token. (I am using curl and I am expecting help related to it).
Here is the dump: string
'code=hzbp3px&client_id=dj0yJmk9WlJ0a3dmQTQ3ZFcyJmQ9WVdrOVFXRXliSFpMTm1zbWNHbzlNQS0tJnM9Y29uc3VtZXJzZWNyZXQmeD1jZA--&client_secret=5b3a803684538bae27519af3e34f3e268da432a1&redirect_uri=http://localhost/DEVELOPMENT/Grabber.php&grant_type=authorization_code' (length=254)
object(stdClass)[5] public 'error' => string 'invalid_request'
(length=15)
Here is my functions:
public function get_url(){
global $session;
switch ($session->get_provider()) {
case "gmail": return "https://accounts.google.com/o/oauth2/token";
break;
case "yahoo": return "https://api.login.yahoo.com/oauth2/get_token";
break;
}
}
public function curl_query($post,$boolean){
$curl = curl_init();
curl_setopt($curl,CURLOPT_URL,$this->get_url());
curl_setopt($curl,CURLOPT_POST,true);
curl_setopt($curl,CURLOPT_POSTFIELDS,$post);
curl_setopt($curl, CURLOPT_RETURNTRANSFER,true);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER,0);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST,0);
curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-Type: application/x-www-form-urlencoded'));
$result = curl_exec($curl);
curl_close($curl);
$response = json_decode($result);
var_dump($response);
//exit;
switch ($boolean) {
case "true": return $response->access_token;
case "false": return $response->refresh_token;
}
}
public function get_access_token($auth_code){
global $session;
switch ($session->get_provider()) {
case "gmail": return $this->curl_query($this->post_params($auth_code,'access_token'),true);
case "yahoo":
$accesstoken = $this->curl_query($this->post_params($auth_code,'access_token'),true);
//$refreshtoken = $this->curl_query($this->post_params($accesstoken),false);
return $accesstoken;
}
}
public function post_params($auth_code,$token){
global $session;
if($token == 'access_token'){
$fields=array(
'code'=> $auth_code,
'client_id'=> $session->get_client_id(),
'client_secret'=> $session->get_client_secret(),
'redirect_uri'=> $session->get_redirect_uri(),
'grant_type'=> 'authorization_code'
);
} else if($token == 'refresh_token'){
$fields=array(
'refresh_token'=> $auth_code,
'client_id'=> $session->get_client_id(),
'client_secret'=> $session->get_client_secret(),
'redirect_uri'=> $session->get_redirect_uri(),
'grant_type'=> 'authorization_code'
);
}
$post = '';
foreach($fields as $key=>$value) { $post .= $key.'='.$value.'&'; }
$post = rtrim($post,'&');
var_dump($post);
return $post;
}

Answer 1

I found out how to get the tokens, here is the code if anyone needs it
Anyway oauth2 is not working with yahoo as i experienced, bellow i am using oauth1.0
public function get_gmail_access_token($auth_code){
global $session;
$fields=array(
'code'=> $auth_code,
'client_id'=> $session->get_client_id(),
'client_secret'=> $session->get_client_secret(),
'redirect_uri'=> $session->get_redirect_uri(),
'grant_type'=> 'authorization_code'
);
$post = '';
foreach($fields as $key=>$value) { $post .= $key.'='.$value.'&'; }
$post = rtrim($post,'&');
$url = 'https://accounts.google.com/o/oauth2/token';
$result = $this->curl_query_post($url,$post);
$response = json_decode($result);
return $response->access_token;
}
public function get_yahoo_access_token($token,$verifier){
global $session;
$tokens = array();
$fields=array(
'oauth_version'=> '1.0',
'oauth_nonce'=> rand(),
'oauth_consumer_key'=> $session->get_client_id(),
'oauth_signature'=> $session->get_client_secret().'%26'.$session->get_token_secret(),
'oauth_timestamp'=> time()+3600,
'oauth_signature_method'=> 'plaintext',
'oauth_token'=> $token,
'oauth_verifier'=> $verifier,
'oauth_callback'=> $session->get_redirect_uri()
);
$post = '';
foreach($fields as $key=>$value) { $post .= $key.'='.$value.'&'; }
$post = rtrim($post,'&');
$url = 'https://api.login.yahoo.com/oauth/v2/get_token';
$result = $this->curl_query_post($url,$post);
$string = parse_str($result);
$tokens['oauth_token'] = $oauth_token;
$tokens['oauth_token_secret'] = $oauth_token_secret;
//$xoauth_yahoo_guid;
return $tokens;
}