blocks|key|2008530|text|Facebook+API不允许此特性：https://developers.facebook.com/bugs/346462608889036/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2008531|entityMap|0|LINK|mutability|MUTABLE|url|https://developers.facebook.com/bugs/346462608889036/^0|J|1H|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Facebook API does not allow this feature:
<a href="https://developers.facebook.com/bugs/346462608889036/" rel="nofollow">https://developers.facebook.com/bugs/346462608889036/</a>

blocks|key|2527081|text|我要亲自实施这一计划。我有一个类似的用例，两个用户可能不是朋友，但我想看看他们的哪些朋友是相互的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2527082|显然，当两个用户不是共同的朋友时，您必须在来自服务器的API请求中包含一个“应用验证”参数：|2527083|如果您想代表两个不是朋友的应用程序用户调用这个端点，那么在发出请求时必须提供证明参数和用户访问令牌。这意味着您必须从服务器调用此端点。|blockquote|offset|length|2527084|看来无论如何这都是个好主意。|2527085|entityMap|0|LINK|mutability|MUTABLE|url|https://developers.facebook.com/docs/graph-api/securing-requests#appsecret_proof^0|0|0|12|4|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@$G|V|H|W|1|X]]|A|$]]|$1|I|3|J|5|6|7|Y|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

I am about to implement this myself. I have a similar use case where the two users may not be friends but I'd like to see which of their friends are mutual.
Apparently, you have to include an 'app proof' parameter with the API request from your server when the two users are not mutual friends:
<blockquote>
If you want to call this endpoint on behalf two app-users who are not friends, then you must provide the <a href="https://developers.facebook.com/docs/graph-api/securing-requests#appsecret_proof" rel="nofollow noreferrer">appsecret_proof parameter</a> along with the user access token when making the request. This means you must call this endpoint from your server.
</blockquote>
Looks like this might be a good idea to do anyway.

blocks|key|2008458|text|设法找到了解决方案，而且正在起作用。如果你的电话在你和其他人的内部工作，而且你们都是Facebook上的朋友，你需要做的就是创建Appsecret。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2008459|它表示App+secret+key+found+on+Facebook+Dev+under+My+Apps和令牌。通过运行：$appsecret_proof=+hash_hmac('sha256',+$access_token,+$app_secret);创建此键|2008460|之后，将令牌和秘密作为参数传递给调用：|2008461|Bundle+params+=+new+Bundle();+
params.putString("appsecret_proof",+appsecret_proof);+
params.putString("access_token",+access_token);|code-block|syntax|javascript|2008462|entityMap^0|1S|9|0|3|1E|1Q|1U|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@$9|U|A|V|B|C]|$9|W|A|X|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|Y|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|Z|8|@]|D|@]|E|$M|N]]|$1|O|3|-4|5|6|7|10|8|@]|D|@]|E|$]]]|P|$]]

Managed to find a solution and it's working. If you got the call working within you and somebody else and you both are friends on Facebook, what you need to do is create the <code>Appsecret</code>

which represents the <code>App secret key found on Facebook Dev under My Apps</code> and the token. You create this key by running :
 <code>$appsecret_proof= hash_hmac('sha256', $access_token, $app_secret);</code>

Afterwards you pass the token and the secret as parameters to the call:

<pre><code>Bundle params = new Bundle(); 
params.putString("appsecret_proof", appsecret_proof); 
params.putString("access_token", access_token);
</code></pre>

blocks|key|2527149|text|它是为两个用户谁不是朋友工作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2527150|下面是facebook共同好友API的一个工作示例：|2527151|curl+-G+-d+"access_token=<access_token>"+-d+"appsecret_proof=<appsecret_proof>"+'https://graph.facebook.com/v2.5/{user-id}?fields=context.fields(mutual_friends)'|code-block|syntax|javascript|2527152|应用程序秘密证明是用户访问令牌的sha256，其密钥为App机密。|2527153|记住，这两个用户都应该使用您的应用程序。该响应将有用户谁也在使用您的应用程序，并给予朋友名单许可。|2527154|如果您想找到有关共同朋友的具体信息，请尝试如下：|2527155|curl+-G+-d+"access_token=<access_token>"+-d+"appsecret_proof=<appsecret_proof>"+'https://graph.facebook.com/v2.5/{user-id}?fields=context.fields(mutual_friends.fields(id,name,picture.type(large)))'|2527156|这将返回所有共同朋友的id，姓名和当前配置文件图像链接。这张照片你不需要照片许可。|2527157|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|Y|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|Z|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|Q|3|R|5|6|7|11|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

It is working for 2 users who are not friends.

Here is a working example for facebook mutual friend API:

<pre><code>curl -G -d "access_token=&lt;access_token&gt;" -d "appsecret_proof=&lt;appsecret_proof&gt;" 'https://graph.facebook.com/v2.5/{user-id}?fields=context.fields(mutual_friends)'
</code></pre>

The App secret proof is sha256 of user access token with app secret as the key.

Remember both user should be using your App.
The response will have users who are also using your app and given friend list permission.

If you want to find specific info about the mutual friends try this:

<pre><code>curl -G -d "access_token=&lt;access_token&gt;" -d "appsecret_proof=&lt;appsecret_proof&gt;" 'https://graph.facebook.com/v2.5/{user-id}?fields=context.fields(mutual_friends.fields(id,name,picture.type(large)))'
</code></pre>

This will return id, Name and current profile image link for all mutual friends. You don't need photos permission for this picture.

blocks|key|2008559|text|这是个老问题，但现在我已经处理好了，所以我会写.|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2008560|要想得到所有共同的朋友，如果你不是他的朋友，那只能从服务器(在我的例子中是Node)中进行，就像这里提到的：朋友/|offset|length|2008561|获取用户2的令牌和您的auth，还可以从应用程序的Facebook管理面板生成appsecretProof和clientSecret。|2008562|https://graph.facebook.com/v2.10/${auth_userId}?+
fields=context.fields%2528all_mutual_friends.limit%2528100%2529%2529+
&appsecret_proof=${appsecretProof}&access_token=${accessToken}|code-block|syntax|javascript|2008563|请记住，当用户登录时，请询问他们的权限，并将应用程序审查发送到Facebook，以批准此功能。|2008564|有了“user_friends”权限，您可以从客户端获得仅在您的应用程序中使用的共同朋友，而不是所有的共同朋友。|2008565|entityMap|0|LINK|mutability|MUTABLE|url|https://developers.facebook.com/docs/graph-api/reference/user-context/all_mutual_friends/^0|0|1I|3|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@$D|10|E|11|1|12]]|A|$]]|$1|F|3|G|5|6|7|13|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|14|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|15|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|16|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]]]

It's an old question but now I've dealt with it so I'll write...

to get all mutual friends if you not his friend it's passible only from 
a server(in my case it's Node) as mention here: 
<a href="https://developers.facebook.com/docs/graph-api/reference/user-context/all_mutual_friends/" rel="nofollow noreferrer">https://developers.facebook.com/docs/graph-api/reference/user-context/all_mutual_friends/</a>

get the token of user-2 and YOUR auth-id, also generate appsecretProof
and clientSecret from your Facebook admin panel of your app.

<pre><code>https://graph.facebook.com/v2.10/${auth_userId}? 
fields=context.fields%28all_mutual_friends.limit%28100%29%29 
&amp;appsecret_proof=${appsecretProof}&amp;access_token=${accessToken}
</code></pre>

remember to ask permmision from users when they login and also send app review to Facebook to approve this feature.

with 'user_friends' permissions you can get from client only mutual friends that use in your app but not all mutual friends.

I want to find out mutual friends between two random users using the facebook Graph API v2.2.

I read through the documentation <a href="https://developers.facebook.com/docs/graph-api/reference/v2.2/user.context/mutual_friends" rel="nofollow noreferrer">https://developers.facebook.com/docs/graph-api/reference/v2.2/user.context/mutual_friends</a>
It says, "A valid user access token with user_friends permission is required to view the mutual friends of other friends using the app. "

Is there a way that I can find number and possibly names of all mutual friends between currentUser and User2, if they are not friends with each other?

I referred to many other questions:
<a href="https://stackoverflow.com/questions/27078789/facebook-graph-api-2-2-mutual-friends">Facebook Graph API 2.2 mutual friends</a> => No answers

<a href="https://stackoverflow.com/questions/6431888/how-to-get-mutual-friends-via-facebooks-graph-api">How to get Mutual Friends via Facebook&#39;s Graph API</a> => The solution works only if the two users are friends, which may not be true in my case.

Finding mutual friends on facebook

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我想找出两个随机用户之间的共同朋友使用FacebookGraphAPIv2.2。我阅读了文档，它说：“使用该应用程序查看其他好友的共同好友需要一个具有user_friends权限的有效用户访问令牌。”如果currentUser和User2不是朋友的话，我能找到他们的号码和名字吗？我提到了许多其他问题： =>没有答案 =>解决方案只有在两个用户是朋友的情况下才能工作，在我的情况下可能不是这样。

问在facebook上寻找共同的朋友
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