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php实现SSO单点登录实例

2017-05-25 10:37 260 查看

1、点击登录跳转到SSO登录页面并带上当前应用的callback地址
2、登录成功后生成COOKIE并将COOKIE传给callback地址
3、callback地址接收SSO的COOKIE并设置在当前域下再跳回到应用1即完成登录
4、再在应用程序需要登录的地方嵌入一个iframe用来实时检测登录状态

<?php
//index.php 应用程序页面
header('Content-Type:text/html; charset=utf-8');
$sso_address      = 'http://www.c.com/sso_login.php'; //你SSO所在的域名
$callback_address = 'http://' . $_SERVER['HTTP_HOST']
. str_replace('index.php', '', $_SERVER['SCRIPT_NAME'])
. 'callback.php'; //callback地址用于回调设置cookie

if (isset($_COOKIE['sign'])) {
exit("欢迎您{$_COOKIE['sign']} <a href=\"login.php?logout\">退出</a>");
} else {
echo '您还未登录 <a href="' . $sso_address . '?callback=' . $callback_address . '">点此登录</a>';
}
?>
<iframe src="<?php echo $sso_address ?>?callback=<?php echo $callback_address ?>" frameborder="0" width="0"
height="0"></iframe>

<?php
//callback.php 回调页面用来设置跨域COOKIE
header('Content-Type:text/html; charset=utf-8');
if (empty($_GET)) {
exit('您还未登录');
} else {
foreach ($_GET as $key => $val) {
setcookie($key, $val, 0, '');
}
header("location:index.php");
}
?>

<?php
//connect.php 用来检测登录状态的页面，内嵌在页面的iframe中
header('Content-Type:text/html; charset=utf-8');
if (isset($_COOKIE['sign'])) {
$callback = urldecode($_GET['callback']);
unset($_GET['callback']);
$query    = http_build_query($_COOKIE);
$callback = $callback . "?{$query}";
} else {
exit;
}
?>
<html>
<script type="text/javascript">top.location.href = "<?php echo $callback; ?>";</script>
</html>

<?php

//login.php SSO登录页面
header('Content-Type:text/html; charset=utf-8');
if (isset($_GET['logout'])) {
setcookie('sign', '', -300);
unset($_GET['logout']);
header('location:index.php');
}

if (isset($_POST['username']) && isset($_POST['password'])) {
setcookie('sign', $_POST['username'], 0, '');
header("location:" . $_POST['callback'] . "?sign={$_POST['username']}");
}

if (empty($_COOKIE['sign'])) {
?>

<form method="post">
<p>用户名：<input type="text" name="username"/></p>
<p>密 码：<input type="password" name="password"/></p>
<input type="hidden" name="callback" value="<?php echo $_GET['callback']; ?>"/>
<input type="submit" value="登录"/>
</form>

<?php
} else {
$query = http_build_query($_COOKIE);
echo "系统检测到您已登录 {$_COOKIE['sign']} <a href=\"{$_GET['callback']}?{$query}\">授权</a> <a href=\"?logout\">退出</a>";
}

done!

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