为什么我得到一个“页面没有正确重定向”的提示?错误 - Why am I getting a "the page isn't redirecting properly" error?

Why am I getting a "the page isn't redirecting properly" error?

我从nettuts得到了这个，有人能告诉我为什么我得到一个"页面没有正确重定向"的错误?

<?php
# We require the library
require("facebook.php");
# Creating the facebook object
$facebook = new Facebook(array(
    'appId'  => 'APP_ID_HERE',
    'secret' => 'APP_SECRET_HERE',
    'cookie' => true
));
# Let's see if we have an active session
$session = $facebook->getUser();
if(!empty($session)) {
    # Active session, let's try getting the user id (getUser()) and user info (api->('/me'))
    try{
        $uid = $facebook->getUser();
        # req_perms is a comma separated list of the permissions needed
        $url = $facebook->getLoginUrl(array(
            'req_perms' => 'email,user_birthday,status_update,publish_stream,user_photos,user_videos'
        ));
        header("Location: $url");
    } catch (Exception $e){}
} else {
    # There's no active session, let's generate one
    $login_url = $facebook->getLoginUrl();
    header("Location: ".$login_url);
}

将认证用户重定向到$facebook->getLoginUrl(array(...))，创建重定向循环。

您应该只重定向未经身份验证的用户(重定向req_perms应该在else子句中)。try中的重定向只有在您检测到用户没有授予您所需的所有权限时才会发生。

可以通过调用

来检查授予的权限

$perms = $facebook->api(array(
    'method' => 'fql.query',
    'query' => 'SELECT email,user_birthday,status_update,publish_stream,user_photos,user_videos FROM permissions WHERE uid=' . $facebook->getUser()
));

修改代码:

<?php
# We require the library
require("facebook.php");
# Creating the facebook object
$facebook = new Facebook(array(
    'appId'  => 'APP_ID_HERE',
    'secret' => 'APP_SECRET_HERE',
    'cookie' => true
));
# Let's see if we have an active session
$session = $facebook->getUser();
if(empty($session)) {
    # There's no active session, let's generate one
    $url = $facebook->getLoginUrl(array(
        'req_perms' => 'email,user_birthday,status_update,publish_stream,user_photos,user_videos'
    ));
    header("Location: $url");
    exit;
}
// user is logged in

如果您使用的是最新的PHP SDK，则已经进行了一些更改，并且您所要求的权限不能以这种方式工作。

这是更新后的代码。

<?php 
# We require the library 
require("facebook.php"); 
# Creating the facebook object 
$facebook = new Facebook(array( 
    'appId'  => 'APP_ID_HERE', 
    'secret' => 'APP_SECRET_HERE', 
    'cookie' => true 
)); 
# Let's see if we have an active session 
$session = $facebook->getUser(); 
if(empty($session)) { 
    # There's no active session, let's generate one 
    $url = $facebook->getLoginUrl(array( 
        "response_type"=>"token", //Can also be "code" if you need to
        "scope" => 'email,user_birthday,status_update,publish_stream,user_photos,user_videos' ,
        "redirect_uri"=> "http://test.com" //Your app callback url
    )); 
    header("Location: $url"); 
    exit; 
} 
// user is logged in

更多信息:http://developers.facebook.com/docs/authentication/