如何使用 Facebook Javascript SDK 创建页面帖子？

Question

我需要能够使用 Facebook Javascript SDK 发布到用户的业务页面。

我已经成功地将我的用户登录到 facebook，但是当我尝试使用一个函数发布到用户的页面时，没有任何反应。我什至尝试在函数中手动输入我自己的页面 id 以使其工作，但仍然没有任何反应。

我使用从 Facebook 文档中获得的以下 javascript 登录我的用户，它可以工作。

<script>

  // This is called with the results from from FB.getLoginStatus().
  function statusChangeCallback(response) {
    console.log('statusChangeCallback');
    console.log(response);
    // The response object is returned with a status field that lets the
    // app know the current login status of the person.
    // Full docs on the response object can be found in the documentation
    // for FB.getLoginStatus().
    if (response.status === 'connected') {
      // Logged into your app and Facebook.
      testAPI();
    } else {
      // The person is not logged into your app or we are unable to tell.
      document.getElementById('status').innerHTML = 'Please log ' +
        'into this app.';
    }
  }

  // This function is called when someone finishes with the Login
  // Button.  See the onlogin handler attached to it in the sample
  // code below.
  function checkLoginState() {
    FB.getLoginStatus(function(response) {
      statusChangeCallback(response);
    });
  }

  window.fbAsyncInit = function() {
    FB.init({
      appId      : 'my app id',
      cookie     : true,  // enable cookies to allow the server to access 
                          // the session
      xfbml      : true,  // parse social plugins on this page
      version    : 'v3.3' // The Graph API version to use for the call
    });

    // Now that we've initialized the JavaScript SDK, we call 
    // FB.getLoginStatus().  This function gets the state of the
    // person visiting this page and can return one of three states to
    // the callback you provide.  They can be:
    //
    // 1. Logged into your app ('connected')
    // 2. Logged into Facebook, but not your app ('not_authorized')
    // 3. Not logged into Facebook and can't tell if they are logged into
    //    your app or not.
    //
    // These three cases are handled in the callback function.

    FB.getLoginStatus(function(response) {
      statusChangeCallback(response);
    });

  };

  // Load the SDK asynchronously
  (function(d, s, id) {
    var js, fjs = d.getElementsByTagName(s)[0];
    if (d.getElementById(id)) return;
    js = d.createElement(s); js.id = id;
    js.src = "https://connect.facebook.net/en_US/sdk.js";
    fjs.parentNode.insertBefore(js, fjs);
  }(document, 'script', 'facebook-jssdk'));

  // Here we run a very simple test of the Graph API after login is
  // successful.  See statusChangeCallback() for when this call is made.
  function testAPI() {
    console.log('Welcome!  Fetching your information.... ');
    FB.api('/me', function(response) {
      console.log('Successful login for: ' + response.name);
      document.getElementById('status').innerHTML =
        'Thanks for logging in, ' + response.name + '!';
    });
        }

    </script>

然后我修改了代码，添加了一个名为 postapi() 的函数来测试登录用户页面的帖子，如下所示：

<script>
        function postapi() {
            FB.api(
                '/{your-page-id}/feed',
                'POST',
                { "message": "Awesome!" },
                function (response) {
                    // Insert your code here
                });
        }
  // This is called with the results from from FB.getLoginStatus().
  function statusChangeCallback(response) {
    console.log('statusChangeCallback');
    console.log(response);
    // The response object is returned with a status field that lets the
    // app know the current login status of the person.
    // Full docs on the response object can be found in the documentation
    // for FB.getLoginStatus().
    if (response.status === 'connected') {
      // Logged into your app and Facebook.
      testAPI();
    } else {
      // The person is not logged into your app or we are unable to tell.
      document.getElementById('status').innerHTML = 'Please log ' +
        'into this app.';
    }
  }

  // This function is called when someone finishes with the Login
  // Button.  See the onlogin handler attached to it in the sample
  // code below.
  function checkLoginState() {
    FB.getLoginStatus(function(response) {
      statusChangeCallback(response);
    });
  }

  window.fbAsyncInit = function() {
    FB.init({
      appId      : 'my app id',
      cookie     : true,  // enable cookies to allow the server to access 
                          // the session
      xfbml      : true,  // parse social plugins on this page
      version    : 'v3.3' // The Graph API version to use for the call
    });

    // Now that we've initialized the JavaScript SDK, we call 
    // FB.getLoginStatus().  This function gets the state of the
    // person visiting this page and can return one of three states to
    // the callback you provide.  They can be:
    //
    // 1. Logged into your app ('connected')
    // 2. Logged into Facebook, but not your app ('not_authorized')
    // 3. Not logged into Facebook and can't tell if they are logged into
    //    your app or not.
    //
    // These three cases are handled in the callback function.

    FB.getLoginStatus(function(response) {
      statusChangeCallback(response);
    });

  };

  // Load the SDK asynchronously
  (function(d, s, id) {
    var js, fjs = d.getElementsByTagName(s)[0];
    if (d.getElementById(id)) return;
    js = d.createElement(s); js.id = id;
    js.src = "https://connect.facebook.net/en_US/sdk.js";
    fjs.parentNode.insertBefore(js, fjs);
  }(document, 'script', 'facebook-jssdk'));

  // Here we run a very simple test of the Graph API after login is
  // successful.  See statusChangeCallback() for when this call is made.
  function testAPI() {
    console.log('Welcome!  Fetching your information.... ');
    FB.api('/me', function(response) {
      console.log('Successful login for: ' + response.name);
      document.getElementById('status').innerHTML =
        'Thanks for logging in, ' + response.name + '!';
    });
        }

    </script>

然后我使用一个按钮打开登录对话框并请求适当的权限，如下所示：

<fb:login-button scope="manage_pages,publish_pages,pages_show_list" onlogin="checkLoginState();">
</fb:login-button>

我通过在文本框中显示用户访问令牌成功测试了它是否实际存储了用户的访问令牌，如下所示：

function placetoken() {
            var user_access_token = FB.getAuthResponse()['accessToken'];
            document.getElementById("<%=TextBox1.ClientID%>").value=user_access_token;
        }

我现在需要能够使用用户访问令牌来获取用户管理的页面列表（包括页面 ID 和页面访问令牌），以便他们可以选择一个发布到。

我试过了：

var user_pages=FB.api('/me/accounts', 'GET');

但我不知道如何捕获 api 返回的内容。

我希望能够使用 Facebook Javascript SDK 登录用户并发布到他们的业务页面。

Answer 1

为了发布到页面（作为页面，这是唯一的选择），您需要执行以下操作：

• 使用manage_pages 和publish_pages 权限进行授权。
• 使用/page-id?fields=access_token 获取相关页面的页面令牌
• 使用页面令牌以/me/feed 发布

带有页面令牌的示例请求：

FB.api(
    '/me/feed',
    'POST',
    {message: 'Awesome!', access_token: 'the-page-token'},
    function (response) {
        // Insert your code here
    }
);

请注意，只有在应用中拥有角色的用户才能看到新帖子，除非您将应用上线并获得 Facebook 审核的所需权限。

Answer 2

在页面供稿上发布需要对特定页面有效的页面令牌，包括页面管理员授予的所有必需权限。因此，您首先需要通过登录来检索 manage_pages 权限，请求该特定页面的页面令牌（例如通过 /me/accounts），然后进行实际的发布提要调用。