Request HTTP POST cURL - php

Question

I have a problem with a request post http. The params are correct but I have an error.
This is my code
Route::get('login/linkedin', function()
{
$lk_credentials = Config::get('linkedin.public0');
$provider = new LinkedIn($lk_credentials);
if(!Input::has('code')){
//exit('debug');
$provider->authorize();
}else{
try{
$code = Input::get('code');
if(strlen($code) == 0) return Redirect::to('/')->with('message', 'There was an error communicating with LinkedIn');
$t = $provider->getAccessToken('authorization_code', array('code' => $code));
}catch(Exception $e){
return 'Unable to get access token';
}
try{
$userDetails = $provider->getUserDetails($t);
$resource = '/v1/people/~:(id,emailAddress,firstName,lastName,pictureUrl,dateOfBirth,location)';
$params = array(
'oauth2_access_token' => $t->accessToken,
'format' => 'json',
);
Session::put('oauth2_access_token', $t->accessToken);session(['oauth2_access_token' => $t->accessToken]);
$url = 'https://api.linkedin.com' . $resource . '?' . http_build_query($params);
$context = stream_context_create(array('http' => array('method' => 'GET')));
$response = file_get_contents($url, false, $context);
$data = json_decode($response);
Session::put('data', $data);session(['data' => $data]);
}catch(Exception $e){
return 'Unable to get user details';
}
try{
if(count($_POST) > 0){
print_r($_POST);
exit();
}
$params = array(
'grant_type' => 'authorization_code',
'code' => Session::get('oauth2_access_token'),
'redirect_uri' => url('login/linkedin'),
'client_id' => '************',
'client_secret' => '***************',
);
$c = curl_init();
curl_setopt($c, CURLOPT_URL, 'http://www.linkedin.com/uas/oauth2/accessToken?');
curl_setopt($c, CURLOPT_RETURNTRANSFER, true);
curl_setopt($c, CURLOPT_POST,true);
curl_setopt($c, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($c, CURLOPT_POSTFIELDS,$params);
curl_setopt($c, CURLOPT_HEADER, false);
curl_setopt($c, CURLOPT_HTTPHEADER, array(
'Content-Type: application/x-www-form-urlencoded',
)
);
$output = curl_exec($c);
if($output === false){
trigger_error('Erreur curl : '.curl_error($c),E_USER_WARNING);
exit('Erreur');
}
else{
var_dump($output);
exit('Affiche');
}
curl_close($c);
return redirect('/')->with('data',$data);
}catch(Exception $e){
return 'Unable to get Request Token';
}
}
});
And this is my error :
{"error_description":"missing required parameters,
includes an invalid parameter value, parameter more than once.
: Unable to retrieve access token : authorization code not found",
"error":"invalid_request"}

Answer 1

While building $params array remember that url must be urlencoded, so if your url function doesn't do that, change this line to:
'redirect_uri' => urlencode(url('login/linkedin'))
Then make post string like this:
$params = http_build_query($params);
And remove ? at the end of CURLOPT_URL.
Also you should include CURLOPT_USERAGENT.