我现在已经完成了我的Facebook应用程序并且它可以工作,但是,当用户首先使用该应用程序时,我会将它们重定向到facebook文档中给出的http://apps.facebook.com/myapp/。
$app_id = "123456789";
$canvas_page = "http://apps.facebook.com/myapp/";
$auth_url = "http://www.facebook.com/dialog/oauth?client_id=".$app_id."&redirect_uri=".urlencode($canvas_page)."&scope=email,publish_stream";
$signed_request = $_REQUEST["signed_request"];
list($encoded_sig, $payload) = explode('.', $signed_request, 2);
$data = json_decode(base64_decode(strtr($payload, '-_', '+/')), true);
if(empty($data["user_id"])){
echo("<script> top.location.href='" . $auth_url . "'</script>");
} else {
echo "Welcome User: " . $data["user_id"]."<br/>";
// UPDATE CODE START
// below code from facebook docs
$app_secret = "asdfghjkl1234567890qwerty";
$my_url = "http://apps.facebook.com/myapp/";
session_start();
$code = $_REQUEST["code"];
if(empty($code)) {
$_SESSION['state'] = md5(uniqid(rand(), TRUE)); //CSRF protection
$dialog_url = "http://www.facebook.com/dialog/oauth?client_id="
. $app_id . "&redirect_uri=" . urlencode($my_url) . "&state="
. $_SESSION['state'];
echo("<script> top.location.href='" . $dialog_url . "'</script>");
}
if($_REQUEST['state'] == $_SESSION['state']) {
$token_url = "https://graph.facebook.com/oauth/access_token?"
. "client_id=" . $app_id . "&redirect_uri=" . urlencode($my_url)
. "&client_secret=" . $app_secret . "&code=" . $code;
$response = file_get_contents($token_url);
$params = null;
parse_str($response, $params);
$graph_url = "https://graph.facebook.com/me?access_token="
. $params['access_token'];
$user = json_decode(file_get_contents($graph_url));
echo("Hello " . $user->name);
} else {
echo("The state does not match. You may be a victim of CSRF.");
}
// UPDATE CODE END
}
die();
问题是在浏览器网址中它看起来类似于以下内容:
http://apps.facebook.com/myapp/?code=saydyab7da976dgas976gdas6gdas6gd06asgd86ags0d6g...etc
什么是“代码”参数以及它为什么存在,我该如何摆脱它?
此致
答案 0 :(得分:1)
您需要使用code
来获取访问令牌。在此之前,您还没有完成身份验证过程。
从文档中获取该代码后,您需要将其发送到Facebook Graph API:
https://graph.facebook.com/oauth/access_token?client_id=YOUR_APP_ID&redirect_uri=YOUR_URL&client_secret=YOUR_APP_SECRET&code=THE_CODE_FROM_ABOVE
总而言之,Facebook OAuth身份验证是一个两步过程,您只完成了其中一个步骤。
谢谢!