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user发起资源请求（带上回调的路径方便回调），通过判断是否浏览器的cookie中是否存在登录过的痕迹，比如有人登了，然后存了一个cookie到浏览器
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如果拿到了cookie是有东西的，则带上这个cookie的内容返回给client，如果没有东西，则继续登录，向session中存入userInfo,并给浏览器设置cookie
-
controller
@Controller
public class LoginController {
static String redirect_url;
/**
* 跳转到登录页面
* @param redirect_url
* @return
*/
@GetMapping(value = "/login.html")
public String toLogin(@RequestParam(value = "redirect_url") String redirect_url,
@CookieValue(value = "sso_token",required = false) String token){
// 如果token不为空，表示有人登录过，其他授信应用也可以直接登陆
if(!StringUtils.isEmpty(token)){
System.out.println("token: " + token);
return "redirect:"+LoginController.redirect_url + "?token="+token;
}
LoginController.redirect_url = redirect_url;
return "login";
}
@Resource
private RedisTemplate<String,String> redisTemplate;
@PostMapping(value="/dologin")
public String doLogin(@RequestParam(value = "username") String username,
@RequestParam(value = "password") String password,
HttpServletResponse response,
@CookieValue(value = "sso_token",required = false) String token) {
// 登录成功的逻辑
if(!StringUtils.isEmpty(username) && !StringUtils.isEmpty(password)){
UserVo userVo = new UserVo();
userVo.setUsername(username);
userVo.setPassword(password);
System.out.println("userVo = " + userVo);
String uuid = createUUID();
// 将token令牌保存到cookie中
Cookie cookie = new Cookie("sso_token", uuid);
response.addCookie(cookie);
System.out.println("设置token成功cookie");
// store to redis to save
redisTemplate.opsForValue().set(uuid,userVo.getUsername());
System.out.println("redirect_url = " + LoginController.redirect_url);
// 将token拼接上，一同返回给client让他们存到redis
String url = LoginController.redirect_url + "?token=" + uuid;
return "redirect:"+url;
}
// 登录失败 to login
return "login";
}
public String createUUID(){
return UUID.randomUUID().toString().replace("-", "");
}
}
sso-client
controller
@Controller
public class HelloController {
@Value(value = "${sso.server.url}")
String ssoServerUrl;
@ResponseBody
@GetMapping(value = "/hello")
public String hello() {
return "hello page";
}
@Resource
RedisTemplate<String,String> redisTemplate;
@GetMapping(value = "/users")
public String usersInfo(HttpSession session,
@RequestParam(value = "token",required = false) String token,
Model model) {
/**
* 表示返回的时候带上了，带上了就表示登录成功了
*/
if(!StringUtils.isEmpty(token)){
System.out.println("client1 token = " + token);
String userInfo = redisTemplate.opsForValue().get(token);
System.out.println("userInfo = " + userInfo);
model.addAttribute("username",userInfo);
return "list";
} else {
String suffixUrl = "?redirect_url=http://client2.com:8092/users";
// 远程登录验证 sso - server
return "redirect:"+ssoServerUrl + suffixUrl;
}
}