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
1 <?php
2 //index.php 应用程序页面
3 header('Content-Type:text/html; charset=utf-8');
4 $sso_address = 'http://www.c.com/sso_login.php'; //你SSO所在的域名
5 $callback_address = 'http://' . $_SERVER['HTTP_HOST']
6 . str_replace('index.php', '', $_SERVER['SCRIPT_NAME'])
7 . 'callback.php'; //callback地址用于回调设置cookie
8
9 if (isset($_COOKIE['sign'])) {
10 exit("欢迎您{$_COOKIE['sign']} <a href="login.php?logout">退出</a>");
11 } else {
12 echo '您还未登录 <a href="' . $sso_address . '?callback=' . $callback_address . '">点此登录</a>';
13 }
14 ?>
15 <iframe src="<?php echo $sso_address ?>?callback=<?php echo $callback_address ?>" frameborder="0" width="0"
16 height="0"></iframe>
17
18 <?php
19 //callback.php 回调页面用来设置跨域COOKIE
20 header('Content-Type:text/html; charset=utf-8');
21 if (empty($_GET)) {
22 exit('您还未登录');
23 } else {
24 foreach ($_GET as $key => $val) {
25 setcookie($key, $val, 0, '');
26 }
27 header("location:index.php");
28 }
29 ?>
30
31 <?php
32 //connect.php 用来检测登录状态的页面，内嵌在页面的iframe中
33 header('Content-Type:text/html; charset=utf-8');
34 if (isset($_COOKIE['sign'])) {
35 $callback = urldecode($_GET['callback']);
36 unset($_GET['callback']);
37 $query = http_build_query($_COOKIE);
38 $callback = $callback . "?{$query}";
39 } else {
40 exit;
41 }
42 ?>
43 <html>
44 <script type="text/javascript">top.location.href = "<?php echo $callback; ?>";</script>
45 </html>
46
47
48 <?php
49
50 //login.php SSO登录页面
51 header('Content-Type:text/html; charset=utf-8');
52 if (isset($_GET['logout'])) {
53 setcookie('sign', '', -300);
54 unset($_GET['logout']);
55 header('location:index.php');
56 }
57
58 if (isset($_POST['username']) && isset($_POST['password'])) {
59 setcookie('sign', $_POST['username'], 0, '');
60 header("location:" . $_POST['callback'] . "?sign={$_POST['username']}");
61 }
62
63 if (empty($_COOKIE['sign'])) {
64 ?>
65
66 <form method="post">
67 <p>用户名：<input type="text" name="username"/></p>
68 <p>密 码：<input type="password" name="password"/></p>
69 <input type="hidden" name="callback" value="<?php echo $_GET['callback']; ?>"/>
70 <input type="submit" value="登录"/>
71 </form>
72
73
74 <?php
75 } else {
76 $query = http_build_query($_COOKIE);
77 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>";
78 }
done!