我刚开始使用谷歌API，所以我觉得自己在黑暗中行走。
我想做的事：
这是一个非常常见的特征。我希望我的网站有一个使用javascipt的谷歌帐户登录按钮，并确保给定的gmail是有效的，也许可以从帐户中提取一些基本信息。
我发现了什么：
我遵循了这里的指示：
https://developers.google.com/+/web/signin/javascript流。
并在指令的最后步骤中复制代码。我已经输入了我按照"教程"中的说明获得的CLIENT_ID，但我的按钮不起作用。我还搜索了一些例子，这些例子与我在谷歌网站上找到的代码截然不同。我觉得我错过了什么（实际上我认为我在做一些愚蠢的事情：）。
这是我的代码
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=ISO-8859-1">
<meta name="google-signin-clientid" content="'MY_CLIENT_ID'.apps.googleusercontent.com" />
<meta name="google-signin-scope" content="https://www.googleapis.com/auth/plus.login" />
<meta name="google-signin-requestvisibleactions" content="http://schema.org/AddAction" />
<meta name="google-signin-cookiepolicy" content="single_host_origin" />
<script src="https://apis.google.com/js/client:platform.js" async defer></script>
<script type="text/javascript">
function signinCallback(authResult) {
if (authResult['status']['signed_in']) {
// Update the app to reflect a signed in user
// Hide the sign-in button now that the user is authorized, for example:
document.getElementById('signinButton').setAttribute('style', 'display: none');
} else {
// Update the app to reflect a signed out user
// Possible error values:
// "user_signed_out" - User is signed-out
// "access_denied" - User denied access to your app
// "immediate_failed" - Could not automatically log in the user
console.log('Sign-in state: ' + authResult['error']);
}
}
function render() {
alert("1");
// Additional params including the callback, the rest of the params will
// come from the page-level configuration.
var additionalParams = {
'callback': signinCallback
};
alert("2");
// Attach a click listener to a button to trigger the flow.
var signinButton = document.getElementById('signinButton');
signinButton.addEventListener('click', function() {
gapi.auth.signIn(additionalParams); // Will use page level configuration
alert("3");
});
}
</script>
</head>
<body>
<button id="signinButton">Sign in with Google</button>
</body>
</html>
我添加了一些警报，但没有弹出任何内容，也没有在任何地方使用"客户端机密"密码或JavaScript来源。此外，"MY_CLIENT_ID"的位置实际上是我的客户ID。
我不知道这是否有什么不同，但我的网站还没有在服务器上。只是在本地工作（当然有互联网！）
你知道我做错了什么吗？
检查控制台，可能有一些错误。
请尝试以下示例https://google-developers.appspot.com/+/demos/signin_demo_trigger:
<html>
<head>
<title>Google+ Sign-in button demo: JavaScript flow</title>
<style type="text/css">
html, body { margin: 0; padding:0;}
#signin-button {
padding: 5px;
}
#oauth2-results pre { margin: 0; padding:0; width: 600px;}
.hide { display: none;}
.show { display: block;}
</style>
<script type="text/javascript">
var loginFinished = function(authResult) {
if (authResult) {
console.log(authResult);
var el = document.getElementById('oauth2-results');
var label = '';
toggleDiv('oauth2-results');
if (authResult['status']['signed_in']) {
label = 'User granted access:';
gapi.auth.setToken(authResult);
} else {
label = 'Access denied: ' + authResult['error'];
}
el.innerHTML =
label + '<pre class="prettyprint"><code>' +
// JSON.stringify doesn't work in IE8.
'{<br />' +
' "id_token" : "' + authResult['id_token'] +'",<br />' +
' "access_token" : "' + authResult['access_token'] + '",<br />' +
' "state" : "' + authResult['state'] + '",<br />' +
' "expires_in" : "' + authResult['expires_in'] + '",<br />' +
' "error" : "' + authResult['error'] + '",<br />' +
' "error_description" : "' + authResult['error_description'] + '",<br />' +
' "authUser" : "' + authResult['authuser'] + '",<br />' +
' "status" : {"' + '<br />' +
' "google_logged_in" : "' + authResult['status']['google_logged_in'] + '",<br />' +
' "method" : "' + authResult['status']['method'] + '",<br />' +
' "signed_in" : "' + authResult['status']['signed_in'] + '"<br />' +
' }<br />' +
'}</code></pre>';
} else {
document.getElementById('oauth2-results').innerHTML =
'Empty authResult';
}
};
function toggleDiv(id) {
var div = document.getElementById(id);
if (div.getAttribute('class') == 'hide') {
div.setAttribute('class', 'show');
} else {
div.setAttribute('class', 'hide');
}
}
var options = {
'callback' : loginFinished,
'approvalprompt' : 'force',
'clientid' : '841077041629.apps.googleusercontent.com',
'requestvisibleactions' : 'http://schema.org/CommentAction http://schema.org/ReviewAction',
'cookiepolicy' : 'single_host_origin'
};
function startFlow(){
toggleDiv('startFlow');
gapi.auth.signIn(options);
}
</script>
<script src="https://apis.google.com/js/client:platform.js" type="text/javascript"></script>
</head>
<body>
<div id="startFlow">
<a class="button button-blue" href="javascript:startFlow();">Click me</a>
to trigger the sign-in flow with
<a href="/+/web/signin/reference#gapi.auth.signIn"
target="_parent"><code>gapi.auth.signIn()</code></a>
</div>
<div id="oauth2-results" class="hide"></div>
<div style="font: 12px sans-serif, Arial; margin-left: 0.5em; margin-top: 0.5em"><a href="javascript:document.location.reload();">Reload the example</a> or <a
href="/+/demos/signin_demo_trigger" target="_blank">open in a new window</a></div>
</body>
</html>
<!-- Sign in with Google+ only work on working website -->
<html lang="en">
<head>
<script src="https://apis.google.com/js/platform.js?onload=renderApp" async defer></script>
</head>
<body>
<div class="g-signin2" id="customBtn">Sign in with Google+</div>
<script>
function onSignIn(googleUser) {
// Useful data for your client-side scripts:
var profile = googleUser.getBasicProfile();
console.log("ID: " + profile.getId()); // Don't send this directly to your server!
console.log('Full Name: ' + profile.getName());
console.log('Given Name: ' + profile.getGivenName());
console.log('Family Name: ' + profile.getFamilyName());
console.log("Image URL: " + profile.getImageUrl());
console.log("Email: " + profile.getEmail());
// The ID token you need to pass to your backend:
var id_token = googleUser.getAuthResponse().id_token;
console.log("ID Token: " + id_token);
};
</script>
<script>
var renderApp = function() {
// GOOGLE_CLIENT_ID should be create from https://developers.google.com/identity/sign-in/web/devconsole-project
gapi.load('auth2', function(){
auth2 = gapi.auth2.init({
client_id: 'GOOGLE_CLIENT_ID.apps.googleusercontent.com',
cookiepolicy: 'single_host_origin',
});
attachSignin('customBtn'); //Function called for click
});
};
function attachSignin(customBtn) {
auth2.attachClickHandler(customBtn, {}, onSignIn, function(error) {
console.log(JSON.stringify(error, undefined, 2));
});
}
</script>
</body>
</html>