bean验证不适用于spring webflux

Question

我已重构代码以使用 spring webflux，但现在 @Valid 停止工作。 它没有验证请求正文。

@PostMapping(value = "/getContactInfo",produces = "application/json",consumes = "application/json")
public Flux<UserContactsModel> getUserContacts(@Valid @RequestBody Mono<LoginModel> loginDetail) {

    loginDetail.log();
    return contactInfoService
        .getUserContacts(loginDetailApiMapper.loginModelMonoToLoginBoMono(loginDetail))
        .flatMapIterable(
            userContactsBO -> contactInfoMapper.userContactBoToModelList(userContactsBO));
}

我得到 200 OK 代替我从控制器建议返回的 Bad request。

编辑 1：

   import javax.validation.constraints.NotNull;
   import javax.validation.constraints.Pattern;

    public class LoginModel implements Serializable {

      private String clientId;

      @Pattern(regexp = "^[a-zA-Z0-9]*$", message = "Login ID is invalid")
      @NotNull
      private String loginId;
    }

更新 1： 像这样更改代码并在类级别添加@Validated

@RestController
@Validated
public class ContactInfoController implements ContactInfoApi {
public Flux<UserContactsModel> getUserContacts(@RequestBody  Mono<@Valid  LoginModel> loginDetail) {

我收到 javax.validation.ConstraintDeclarationException: HV000197: No value extractor found for type parameter 'T' of type reactor.core.publisher.Mono。

Answer 1

没有什么对我有用。所以我使用 javax.validator 手动验证了它。

@Autowired private Validator validator;

 public Flux<UserContactsModel> getUserContacts(@RequestBody Mono<@Valid LoginModel> loginDetail) {

    return loginDetail
        .filter(this::validate)
        .map(....);
}

 private boolean validate(LoginModel loginModel) {

    Set<ConstraintViolation<LoginModel>> constraintViolations = validator.validate(loginModel);

    if (CollectionUtils.isNotEmpty(constraintViolations)) {
      StringJoiner stringJoiner = new StringJoiner(" ");
      constraintViolations.forEach(
          loginModelConstraintViolation ->
              stringJoiner
                  .add(loginModelConstraintViolation.getPropertyPath().toString())
                  .add(":")
                  .add(loginModelConstraintViolation.getMessage()));
      throw new RuntimeException(stringJoiner.toString());
    }

    return true;
  }

Answer 2

对我来说，@Valid 开箱即用，缺少的部分是在类路径中添加 spring-boot-starter-validation：

  <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-validation</artifactId>
  </dependency>

我有与这个问题完全相同的控制器代码加上一个ExceptionHandler 来处理 bean 验证错误：

@ResponseBody
@ExceptionHandler(WebExchangeBindException.class)
Mono<ResponseEntity<List<ErrorDTO>>> invalidRequestErrorHandler(@NotNull final WebExchangeBindException e) {
    log.error("Invalid request exception occurred", e);
    var errors = e.getBindingResult()
            .getAllErrors()
            .stream()
            .filter(Objects::nonNull)
            .map(this::getValidationErrorMessage)
            .toList();
    return Mono.just(ResponseEntity.status(BAD_REQUEST)
            .contentType(APPLICATION_JSON)
            .body(errors));
}

@NotNull
private ErrorDTO getValidationErrorMessage(@NotNull final ObjectError error) {
    final var errorMessage = new StringBuilder();
    if (error instanceof FieldError fe) {
        errorMessage.append(fe.getField()).append(" - ");
    }
    errorMessage.append(error.getDefaultMessage());
    return new ErrorDTO()
            .errorCode(GENERIC_ERROR).message(errorMessage.toString());
}

Answer 3

@Valid 注解验证一个对象。所以你要验证一个 Mono，你需要更改为 LoginModel 对象，例如：

  ..getUserContacts(@RequestBody Mono<@Valid LoginModel> loginDetail) {
      ...
  }