作者:Eugen Paraschiv
譯者:oopsguy.com
1、概述
在本教程中,我們將繼續 Spring Security 系列中的註冊流程,在使用者啟用帳戶之前重發驗證連結給使用者。
2、重發驗證連結
首先,當使用者請求另一個驗證連結時,我們需要防上一個驗證連結發生過期。
我們將用新的 expireDate 重置現有的令牌,之後向使用者傳送一封新郵件,並附上新的連結和令牌:
@RequestMapping(value = "/user/resendRegistrationToken", method = RequestMethod.GET)
@ResponseBody
public GenericResponse resendRegistrationToken(
HttpServletRequest request, @RequestParam("token") String existingToken) {
VerificationToken newToken = userService.generateNewVerificationToken(existingToken);
User user = userService.getUser(newToken.getToken());
String appUrl =
"http://" + request.getServerName() +
":" + request.getServerPort() +
request.getContextPath();
SimpleMailMessage email =
constructResendVerificationTokenEmail(appUrl, request.getLocale(), newToken, user);
mailSender.send(email);
return new GenericResponse(
messages.getMessage("message.resendToken", null, request.getLocale()));
}
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生成使用者郵件的工具方法 — constructResendVerificationTokenEmail()
:
private SimpleMailMessage constructResendVerificationTokenEmail
(String contextPath, Locale locale, VerificationToken newToken, User user) {
String confirmationUrl =
contextPath + "/regitrationConfirm.html?token=" + newToken.getToken();
String message = messages.getMessage("message.resendToken", null, locale);
SimpleMailMessage email = new SimpleMailMessage();
email.setSubject("Resend Registration Token");
email.setText(message + " rn" + confirmationUrl);
email.setFrom(env.getProperty("support.email"));
email.setTo(user.getEmail());
return email;
}
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我們還需要修改現有的註冊功能 — 在模型上新增一些涉及到令牌到期的新邏輯:
@RequestMapping(value = "/regitrationConfirm", method = RequestMethod.GET)
public String confirmRegistration(
Locale locale, Model model, @RequestParam("token") String token) {
VerificationToken verificationToken = userService.getVerificationToken(token);
if (verificationToken == null) {
String message = messages.getMessage("auth.message.invalidToken", null, locale);
model.addAttribute("message", message);
return "redirect:/badUser.html?lang=" + locale.getLanguage();
}
User user = verificationToken.getUser();
Calendar cal = Calendar.getInstance();
if ((verificationToken.getExpiryDate().getTime() - cal.getTime().getTime()) <= 0) {
model.addAttribute("message", messages.getMessage("auth.message.expired", null, locale));
model.addAttribute("expired", true);
model.addAttribute("token", token);
return "redirect:/badUser.html?lang=" + locale.getLanguage();
}
user.setEnabled(true);
userService.saveRegisteredUser(user);
model.addAttribute("message", messages.getMessage("message.accountVerified", null, locale));
return "redirect:/login.html?lang=" + locale.getLanguage();
}
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3、異常處理
以前的功能是在某些情況下丟擲異常,這些異常需要處理,我們將使用自定義的異常處理程式來處理這些異常:
@ControllerAdvice
public class RestResponseEntityExceptionHandler extends ResponseEntityExceptionHandler {
@Autowired
private MessageSource messages;
@ExceptionHandler({ UserNotFoundException.class })
public ResponseEntity<Object> handleUserNotFound(RuntimeException ex, WebRequest request) {
logger.error("404 Status Code", ex);
GenericResponse bodyOfResponse = new GenericResponse(
messages.getMessage("message.userNotFound", null, request.getLocale()), "UserNotFound");
return handleExceptionInternal(
ex, bodyOfResponse, new HttpHeaders(), HttpStatus.NOT_FOUND, request);
}
@ExceptionHandler({ MailAuthenticationException.class })
public ResponseEntity<Object> handleMail(RuntimeException ex, WebRequest request) {
logger.error("500 Status Code", ex);
GenericResponse bodyOfResponse = new GenericResponse(
messages.getMessage(
"message.email.config.error", null, request.getLocale()), "MailError");
return handleExceptionInternal(
ex, bodyOfResponse, new HttpHeaders(), HttpStatus.NOT_FOUND, request);
}
@ExceptionHandler({ Exception.class })
public ResponseEntity<Object> handleInternal(RuntimeException ex, WebRequest request) {
logger.error("500 Status Code", ex);
GenericResponse bodyOfResponse = new GenericResponse(
messages.getMessage(
"message.error", null, request.getLocale()), "InternalError");
return handleExceptionInternal(
ex, bodyOfResponse, new HttpHeaders(), HttpStatus.NOT_FOUND, request);
}
}
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注意:
我們使用 @ControllerAdvice
註解來處理整個應用程式中的異常,並使用一個簡單的物件 GenericResponse 來傳送響應:
public class GenericResponse {
private String message;
private String error;
public GenericResponse(String message) {
super();
this.message = message;
}
public GenericResponse(String message, String error) {
super();
this.message = message;
this.error = error;
}
}
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4、修改 badUser.html
現在我們修改 badUser.html,使使用者只有在令牌過期時才能獲得新的 VerificationToken
:
<html>
<head>
<title th:text="#{label.badUser.title}">bad user</title>
</head>
<body>
<h1 th:text="${param.message[0]}">error</h1>
<br>
<a th:href="@{/user/registration}" th:text="#{label.form.loginSignUp}">
signup</a>
<div th:if="${param.expired[0]}">
<h1 th:text="#{label.form.resendRegistrationToken}">resend</h1>
<button onclick="resendToken()"
th:text="#{label.form.resendRegistrationToken}">resend</button>
<script src="jquery.min.js"></script>
<script type="text/javascript">
var serverContext = [[@{/}]];
function resendToken(){
$.get(serverContext + "user/resendRegistrationToken?token=" + token,
function(data){
window.location.href =
serverContext +"login.html?message=" + data.message;
})
.fail(function(data) {
if(data.responseJSON.error.indexOf("MailError") > -1) {
window.location.href = serverContext + "emailError.html";
}
else {
window.location.href =
serverContext + "login.html?message=" + data.responseJSON.message;
}
});
}
</script>
</div>
</body>
</html>
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請注意,我們在這裡使用了一些非常簡單的 JavaScript 和 JQuery 來處理 /user/resendRegistrationToken 的響應,並根據它重定向使用者。
5、結論
在本文中,我們允許使用者重新請求一個新的驗證連結來啟用賬戶,以防舊賬戶過期。
本教程的完整實現可以在 github 專案中找到 — 這是一個基於 Eclipse 的專案,應該很容易匯入和執行。