Hi
I've been trying to integrate reCaptcha with my application built on Spring framework, but I am getting this error:
org.springframework.web.bind.MissingServletRequestParameterException: Required String parameter 'recaptcha_challenge_field' is not present
Could someone help me understand that why am I getting this error. I've got both recaptcha_challenge_field and recaptcha_response_field parameters bound to the User domain object.
Could anybody help me understand what am I missing?
Thanks
Here is the code of the controller I am using, all I am trying to do is register a user with reCaptcha functionality but what I am getting is a http status 400 with the error org.springframework.web.bind.MissingServletRequestParameterException: Required String parameter 'recaptcha_challenge_field' is not present:
UserManagementController.java
@Controller
public class UserManagementController {
private static final String RECAPTCHA_HTML = "reCaptchaHtml";
@Autowired
private UserService userService;
@Autowired
private ReCaptcha reCaptcha;
@RequestMapping(method=RequestMethod.GET, value="/addNewUser.do")
public ModelAndView addNewUser() {
User user = new User();
String html = reCaptcha.createRecaptchaHtml(null, null);
ModelMap modelMap = new ModelMap();
modelMap.put("user", user);
modelMap.put(RECAPTCHA_HTML, html);
return new ModelAndView("/addNewUser", modelMap);
}
@RequestMapping(method=RequestMethod.POST, value="/addNewUser.do")
public String addNewUser(@Valid User user, BindingResult result,
@RequestParam("recaptcha_challenge_field") String challenge,
@RequestParam("recaptcha_response_field") String response,
HttpServletRequest request,
Model model) {
verifyBinding(result);
String remoteAddr = request.getRemoteAddr();
ReCaptchaResponse reCaptchaResponse = reCaptcha.checkAnswer(remoteAddr, challenge, response);
if (!reCaptchaResponse.isValid()) {
result.rejectValue("captcha", "errors.badCaptcha");
}
model.addAttribute("user", user);
if (result.hasErrors()) {
result.reject("form.problems");
return "addNewUser";
}
return "redirect:showContent.do";
}
@InitBinder
public void initBinder(WebDataBinder binder) {
binder.setAllowedFields(new String[] {
"firstName", "lastName", "email",
"username", "password", "recaptcha_challenge_field", "recaptcha_response_field"
});
}
private void verifyBinding(BindingResult result) {
String[] suppressedFields = result.getSuppressedFields();
if (suppressedFields.length > 0) {
throw new RuntimeException("You've attempted to bind fields that haven't been allowed in initBinder(): "
+ StringUtils.join(suppressedFields, ", "));
}
}
}
Here is the addNewUser.jsp element on the form page for the above controller:
<tr>
<td>Please prove you're a person</td>
<td>${reCaptchaHtml}</td>
<td><form:errors path="captcha" cssStyle="color:red"></form:errors></td>
</tr>
Could you help me understand what am I missing here?
Thanks for reply.
