Facebook Email field return null (even if the “ema

问题:

For some users in our application, the email field returns NULL even if the user has granted the email access to the app. When we check the scope parameter and the validity of the user Token thanks to the Debugger tool, everything is ok. The permission email has been accepted. But when we ask the Graph API for the email of the user with the valid user token, it does not appear at all.

Is there a way a user could prevent an app from getting his email even if he granted the email permission?

Thanks

回答1:

I had the same problem and I think I found out why: If the user has an unconfirmed email in Facebook (i.e. Facebook sent him a validation mail to the user's email address but he didn't respond) Facebook WILL NOT pass that email to your app even if he gave you the email permissions.

So what I did is use his or her Facebook email if the user has a user name (i.e. [e-mail]).

回答2:

I have the same issue. It is working fine on my localhost, i am using php SDK for facebook login and when i submit my request it's return all the fields like email,name etc of the user but on server somehow it is not working.It will not returns user email. I have done lots of R&D on that and i have the solution for the issue. :)

$profile = $facebook->api('/me?fields=email,first_name,last_name');

if you are using php-sdk just passes fields like this it returns the email,first_name etc. Hopes it works for you all. thanks.

回答3:

Facebook does not send the email if the user has logged in with their phone number. View the comments on https://github.com/mkdynamic/omniauth-facebook/issues/61 for more info.

回答4:

You must give email permission along with the auth button.

authButton.setReadPermissions(Arrays.asList("email"));

回答5:

All you need to know:

1) Link 1

Some possible reasons:

No Email address on account

No confirmed email address on account

No verified email address on account

User entered a security checkpoint which required them to reconfirm their email address and they have not yet done so

• Users's email address is unreachable

• You also need the 'email' extended permission, even for users who have a valid, confirmed, reachable email address on file.

2) Link 2

Note, even if you request the email permission it is not guaranteed you will get an email address. For example, if someone signed up for Facebook with a phone number instead of an email address, the email field may be empty.

回答6:

In some cases Facebook may not have a valid email address for a user:

email: string containing a valid RFC822 email address - note: this field may be null if no email address is available for the user

see https://developers.facebook.com/docs/reference/api/user/

回答7:

Facebook will provide you a user's email id if and only that user has a confirmed email id associated with his account. If your app can retrieve email id for some users, problem may not with the Developer.

回答8:

@ozba solution is not applicable because facebook now shows an alert message when user has an unconfirmed email address. So, if you're having this problem it's more liking that the user had signed up using phone number.

Some possible reasons:

• No Email address on account (only phone number)
• No confirmed email address on account
• User entered a security checkpoint which required them to reconfirm their email address and they have not yet done so users's email address is unreachable.

Check: https://developers.facebook.com/bugs/298946933534016

回答9:

According to the documentation:

Note, even if you request the email permission it is not guaranteed you will get an email address. For example, if someone signed up for Facebook with a phone number instead of an email address, the email field may be empty.

That would explain why some users have a null email!

回答10:

I have read previous responses but though some of them true like if the user has not email confirmed but a mobile phone number, many times this error happens for ignoring how to request the information using FB api graph. Let's say your login was successfully done, and you now have an access token and user id an so on but still, cannot see email and other fields you are interested in. Go ahead using this request after confirming login status as connected:

FB.api(
  '/me',
  'GET',
  {"fields":"id,name,birthday,email,about,cover"},
  function(response) {
      // Insert your code here
  }
);

depends on permissions you requested you now will be able to catch further information according to your needs.

回答11:

you can try this it will work String email = user.getProperty("email").toString(); String safeEmail = user.asMap().get("email").toString();

回答12:

You need one more permission from facebook.

include (about_me) permission to the facebook dev setting and also in your app or code..

回答13:

$loginUrl = $facebook->getLoginUrl(
  array(
    'req_perms' => 'email'
  )
);