Facebook API Error code: 100 Error Message: Viewer cannot message specified recipients

问题

I'm using the Facebook JS SDK to let my site's users send FB messages from my site. I periodically see the following error:

API Error Code: 100
API Error Description: Invalid parameter
Error Message: Viewer cannot message specified recipients.

I'm confused because it doesn't happen consistently. It's more like once in every 8 attempts, with no apparent pattern. Any ideas?

Here's my code. First...

<script>
      window.fbAsyncInit = function() {
        FB.init({
          appId      : '##########', // App ID
          channelUrl : '//www.xxxxxxxxxx.com/channel.php', // Channel File
          status     : true, // check login status
          cookie     : true, // enable cookies to allow the server to access the session
          xfbml      : true  // parse XFBML
        });

        // Additional initialization code here
      };

      // Load the SDK Asynchronously
      (function(d){
         var js, id = 'facebook-jssdk', ref = d.getElementsByTagName('script')[0];
         if (d.getElementById(id)) {return;}
         js = d.createElement('script'); js.id = id; js.async = true;
         js.src = "//connect.facebook.net/en_US/all.js";
         ref.parentNode.insertBefore(js, ref);
       }(document));
    </script>

Then, here's the link to send the message:

<a href='#' onClick="
        FB.ui({
          method: 'send',
          name: 'Bla bla bla',
          link: 'http://www.xxxxxxxxxxx.com',
          to: ###########,
          //redirect_uri: 'http://www.xxxxxxxxxxx.com/fb/'
          });
        ">Send a message</a>

回答1:

You’re not letting the user chose the recipient(s) themselves, but try to set them yourself.

If the recipient has his settings so that he doesn’t accept messages from “everyone”, and your user is not a friend of theirs – then that’s exactly what I would expect to happen.

来源：https://stackoverflow.com/questions/11235527/facebook-api-error-code-100-error-message-viewer-cannot-message-specified-reci