Facebook的API - UID和电子邮件 [英] Facebook API - uids and email

问题描述

我想开发一个应用程序，其中

1. 用户X已经登录到Facebook的


2. 应用程序有一组电子邮件地址（用户可能朋友'X'）


3. 应用程序获取的用户好友列表中的X的信息（UID）


4. 要检查是否与电子邮件地址[e-mail]用户通过使用电子邮件地址有效的Facebook的用户和用户是X的朋友（基本上以电子邮件映射UID）

解决方案

是的，这是可能的。首先，获得的UID为所有用户的朋友。然后，执行这个FQL得到email_hashes为每个朋友：

  SELECT email_hashes FROM用户WHERE UID IN（comma_delimted_set_of_uids）
 

既然你已经拥有的电子邮件地址，你可以散列它，并将它与Facebook的email_hash。如果你有一个比赛，你就知道它是有效的。根据该FB文档，每封电子邮件散列格式的电子邮件地址以下划线（_）相结合的CRC32和MD5哈希值。

I am trying to develop a application where

1. The user 'X' has logged into Facebook
2. app has a set of email addresses (possible friends of user 'X')
3. app gets the list of friends of user 'X' (uids)
4. Want to check if user with email address [e-mail] is a valid facebook user by using email address and is user X's friend (basically a uid to email mapping)

解决方案

Yes, this is possible. First, get the UIDs for all of a user's friends. Then, execute this FQL to get the email_hashes for each friend:

SELECT email_hashes FROM user WHERE uid IN (comma_delimted_set_of_uids)

Since you already have the email address, you can hash it and compare it to facebook's email_hash. If you have a match, you know it's valid. According to the FB documentation, the format of each email hash is the crc32 and md5 hashes of the email address combined with an underscore (_).

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