我已将fb与我的应用集成，如下所示，
我正在使用fb示例代码，当我获得连接状态时，我正在尝试使用OpenMainPage打开我的应用页面。虽然我已成功登录并进入我的应用程序，OpenMainPage（）在无限循环中被调用...我在fb回调上下文中打开页面时做错了什么？
// 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.
OpenMainPage();
//window.open("http://Apples-iMac.local/~padmashreebhat/MyProject/MyNest/client/mainpage.html","_self");
} 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.
function checkLoginState() {
FB.getLoginStatus(function(response) {
statusChangeCallback(response);
});
}
window.fbAsyncInit = function() {
FB.init({
appId : '1511255225772471',
cookie : true, // enable cookies to allow the server to access
// the session
xfbml : true, // parse social plugins on this page
version : 'v2.0' // use version 2.0
});
// 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 = "//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 OpenMainPage() {
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.email + '!';
window.open("http://Apples-iMac.local/~padmashreebhat/MyProject/MyNest/client/mainpage.html","_self");
});
}
答案 0 :(得分：0)
我的这个Javascript代码也存在无限循环问题。我见过打破循环的解决方案。但是我不喜欢插入一个循环中断，因为它仍在执行错误的代码（但是以受控的方式）。 最好重写Javascript代码以避免从一开始就进入无限循环。
我使用此代码段通过Facebook帐户客户端登录用户，然后将帐户信息发回服务器，以根据提供的Facebook凭据自动生成会员用户。
我DID将自己的代码保留在任何Facebook JS函数和事件之外，并通过按钮单击事件处理程序调用它。
更新：当用户使用Facebook登录按钮登录时，我重写了整个登录流程以允许自动服务器端登录/注册。我必须覆盖javascript登录流程，因为它在与主页/内容页面结合使用时会生成循环;即使这样它也无法正常工作，所以我创建了自己的附加服务器逻辑。 这是客户端代码：
/*
* ///////////////////////////////// FACEBOOK LOGIN JAVASCRIPT EVENTS //////////////////////////////
*/
// 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 if (response.status === 'not_authorized') {
// The person is logged into Facebook, but not your app.
document.getElementById('status').innerHTML = 'You haven\'t authorized 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 = 'You are not signed in to Facebook.';
}
}
// 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);
});
}
function login() {
FB.Event.subscribe('login', FaceBookRegister());
}
//, { scope: 'user_location,user_likes' }
var loggedIn = false;
var uid;
var accessToken;
var form;
window.fbAsyncInit = function () {
FB.init({
appId: '700271373360155',
status: true,
cookie: true, // enable cookies to allow the server to access
// the session
xfbml: true, // parse social plugins on this page
version: 'v2.0' // use version 2.0
});
FB.Event.subscribe('auth.authResponseChange', function (response) {
if (response.status === 'connected') {
// the user is logged in and has authenticated your
// app, and response.authResponse supplies
// the user's ID, a valid access token, a signed
// request, and the time the access token
// and signed request each expire
uid = response.authResponse.userID;
accessToken = response.authResponse.accessToken;
sessionStorage.setItem("authorized", true);
loggedIn = true;
statusChangeCallback(response);
// This is a form post since we don't want to use AJAX
}
else if (response.status === 'not_authorized') {
// the user is logged in to Facebook,
// but has not authenticated your app
loggedIn = false;
initLogin = false;
} else {
sessionStorage.removeItem("UserName");
loggedIn = false;
FacebookLogoutLocal();
}
});
// 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) {
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));
// 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 =
'You are now loggeed in, ' + response.name + '!';
var userAuthenticated = sessionStorage.getItem("UserName");
if (userAuthenticated != response.name) {
FaceBookRegister();
}
sessionStorage.setItem("UserName", response.name);
});
};
//////////////////////////////// AUTHENTICATE THE FACEBOOK USER ON THE SERVER ///////////////////////////////
function FaceBookRegister() {
if (loggedIn == true) {
form = document.createElement("form");
form.setAttribute("method", 'post');
form.setAttribute("action", '/FacebookLoginMobileEng.ashx');
var field = document.createElement("input");
field.setAttribute("type", "hidden");
field.setAttribute("name", 'accessToken');
field.setAttribute("value", accessToken);
form.appendChild(field);
document.body.appendChild(form);
form.submit();
}
else {
//alert('U dient zich eerst aan te melden met uw Facebook account!');
FacebookLogoutLocal();
}
}
//////////////////////////////// LOGS THE USER OUT FROM THE SERVER ////////////////////////////
function FacebookLogoutLocal() {
if (loggedIn == false) {
form = document.createElement("form");
form.setAttribute("method", 'post');
form.setAttribute("action", '/FacebookLogout.ashx');
document.body.appendChild(form);
form.submit();
}
}
从FB Javascrip SDK站点，您应该使用authResponseChange事件中的表单提交数据;但这会产生无限循环。 所以我将该代码放在我自己的函数中。 注册功能在我的会员数据库中创建一个Facebook用户，其中包含Facebook名称和电子邮件以及自动生成的密码以确保安全。它最初将facebook数据发回服务器并将其传递给HTTP处理程序，该处理程序重定向到专用于处理facebook凭据和其他凭据的页面，以编程方式创建新的Membership用户。
要与Javascript SDK一起正常工作，我必须添加其他服务器逻辑： 您必须重定向到没有相同主服务器的页面。您需要先存储请求网址：
FaceBookSession.UrlFbLoginSolver = context.Request.UrlReferrer.AbsolutePath;
我在我的主文件代码中使用它来检查：
if (FaceBookSession.UrlFbLoginSolver.Contains("Dutch"))
{
string url = FaceBookSession.UrlFbLoginSolver;
FaceBookSession.UrlFbLoginSolver = String.Empty;
Response.Redirect(url);//redirects back to the original requester
}
else
{
....//normal page load
}