Facebook应用程序：附加权限 [英] Facebook Apps: Additional permissions

问题描述

我有一个有效的Facebook应用程序，大多数用户只能使用一次。进入Facebook的工作流程，用户会指出他们是否希望将墙壁写入。基于此，我要么要求publish_stream权限。

稍后，一小部分用户将会再次使用该应用程序。一些以前不想写墙的人（因此我没有要求publish_stream）现在想写给他们的墙。

如何在用户已经授权应用程序后，我要求另外的许可？

同样，我如何查询用户列出他们已经授权的权限？

解决方案

简单的添加新的权限到新的 fb：login-button ：

 < fb：login-button scope =publish_stream> 
让我写在你的墙上！ 
< / fb：login-button> 
  

所以例如你上面隐藏在DIV中，如果用户勾选一个复选框，你会显示DIV并提示新的权限！

一个很好的直播的例子是在 Facebook Test Console ：

1. 点击登录以添加应用程序


2. 然后点击示例


3. 在 fb.api 选择类似

现在你可以看到即使连接到应用程序（测试控制台应用程序），您 可以 实际上有另一个登录按钮提示用户！

编辑：

要检查用户是否已经授予您的应用程序权限，只需使用此FQL： p>

  SELECT read_stream，offline_access FROM permissions WHERE uid = me（）
  

这将返回以下内容：

  [
 {
read_stream：1，
offline_access：0 
} 
] 
  

要测试它，只需使用早期发布的测试控制台。

编辑2：

要使用XFBML或Javascript自己构建链接，您只需添加 scope 参数与附加的perms（参考）：

  https://www.facebook.com/dialog/oauth？ 
 client_id = YOUR_APP_ID& redirect_uri = YOUR_URL& scope = publish_stream 
  

或者如果您使用 PHP-SDK ：

  $ loginUrl = $ facebook-> getLoginUrl（array（
scope=>publish_stream
））; 
  

I have a working Facebook app that most users will use just once. Leading into the Facebook workflow, users indicate if they want their wall to be written to or not. Based on that, I either ask for the publish_stream permission or not.

Later, a small percentage of users will come back and use the app again. Some of the people who previously did not want to write to the wall (and thusly I didn't ask for publish_stream) now want to write to their wall.

How do I request an additional permission after the user has already authorized the app?

Similarly, how can I query a user to list which permissions they have already granted?

解决方案

It's as simple as adding the new permission to a new fb:login-button:

<fb:login-button scope="publish_stream">
  Let me write on your wall!
</fb:login-button>

So for example you have the above hidden in a DIV and if the user tick a checkbox you show the DIV and prompt the new permission!

A good live example of this is on the Facebook Test Console:

1. Click login to "add" the application
2. Then click on examples
3. Under fb.api choose does-like

Now you can see that even after being *connected to the application (test console app), you can actually have another login button to prompt the user!

EDIT:
To check if the user has granted your application a permission, just use this FQL:

SELECT read_stream,offline_access FROM permissions WHERE uid=me()

This would return something like:

[
  {
    "read_stream": 1,
    "offline_access": 0
  }
]

To test it, just use the test console posted early.

EDIT 2:
To construct the link yourself without XFBML or Javascript, you just need to add the scope parameter with the additional perms (reference):

https://www.facebook.com/dialog/oauth?
     client_id=YOUR_APP_ID&redirect_uri=YOUR_URL&scope=publish_stream

Or if your are using the PHP-SDK:

$loginUrl = $facebook->getLoginUrl(array(
    "scope" => "publish_stream"
));

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