How to check if I can send a private message to a user or not using the Facebook API or not?

How to check if I can send a private message to a Facebook user or not using the Facebook API?

The receiver may not necessarily be my friend. Also he hasn't given any rights to my Facebook application.

Edit: I am using Send dialog for sending private messages to private users but it shows error if the person has disabled to receive private 开发者_Python百科messages.

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As I know the FB private messaging has been removed from the public api, I mean that usually apps can't send a private message to FB users, but also as I know you can cooperate with FB to get a special permission for your app, for example in Rockmelt browser you can send private messages, that measn that there is a way to do that, but FB controls that way.

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Could you elaborate more on the sender? Do you require the sender's consent?

Please check if the Send Dialog is what you are looking for https://developers.facebook.com/docs/reference/dialogs/send/

AFAIK this is the only way to send private message to an individual. But it requires the user's consent.

You can read more at this similar post: http://facebook.stackoverflow.com/questions/2943297/how-send-message-facebook-friend-through-graph-api-using-accessstoken