javascript - 使用 reactjs 实现 Facebook API 登录

Question

我正在研究使用 Facebook 的 Javascript SDK 进行身份验证。我已经能够正确导入 SDK 并在我的页面上放置一个 Like 按钮。但是，Facebook 登录按钮必须包含在标签中:

<fb:login-button/>

我目前拥有 Facebook Login tutorial 中的所有代码粘贴到我的 index.html 中，这是我项目中唯一的 html 文件，其中包含 React 应用程序。但是，我需要将具有实际登录按钮的最后一部分放入我的 React 组件中。当我尝试这样做时，出现以下错误:

ReactifyError: /Users/ritmatter/reps/js/components/Signup.jsx: Parse Error: Line 82: Unexpected end of input while parsing file: /Users/ritmatter/reps/js/components/Signup.jsx
sdk.js:61 The "fb-root" div has not been created, auto-creating
ping?client_id=894010190618709&domain=localhost&origin=1&redirect_uri=http%3A%2F%2Fstatic.ak.facebo…:1 Given URL is not allowed by the Application configuration.: One or more of the given URLs is not allowed by the App's settings.  It must match the Website URL or Canvas URL, or the domain must be a subdomain of one of the App's domains.

如何让登录按钮响应？

Answer 1

我已经弄清楚如何使用 ReactJS 修改登录 API 的 Facebook 教程。我希望这可以帮助其他正在为此苦苦挣扎的人。

首先，在您想要登录链接的 React 组件中，包含以下代码:

componentDidMount: function() {
  window.fbAsyncInit = function() {
    FB.init({
      appId      : '<YOUR_APP_ID>',
      cookie     : true,  // enable cookies to allow the server to access
                        // the session
      xfbml      : true,  // parse social plugins on this page
      version    : 'v2.1' // use version 2.1
    });

    // 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) {
      this.statusChangeCallback(response);
    }.bind(this));
  }.bind(this);

  // 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 = "//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.
testAPI: function() {
  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 + '!';
  });
},

// This is called with the results from from FB.getLoginStatus().
statusChangeCallback: function(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.
    this.testAPI();
  } else if (response.status === 'not_authorized') {
    // The person is logged into Facebook, but not your app.
    document.getElementById('status').innerHTML = 'Please log ' +
      'into this app.';
  } else {
    // The person is not logged into Facebook, so we're not sure if
    // they are logged into this app or not.
    document.getElementById('status').innerHTML = 'Please log ' +
    'into Facebook.';
  }
},

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

handleClick: function() {
  FB.login(this.checkLoginState());
},

然后，在您的呈现方法中，确保您有一些 HTML 将调用该 handleClick:

<a href="#" onClick={this.handleClick}>Login</a>

请注意，这与教程中的代码相同，但放在 ReactJS 组件中。唯一的区别是您必须策略性地绑定(bind)它以使 Facebook API 函数成为您的 React 组件的一部分。此登录将以从 FB.getLoginStatus() 给出的响应中解析的响应消息结束。您还可以从该响应对象中取出 token 并将其发送到您的后端以使用 passport-facebook-token 之类的内容进行身份验证。 .