我想返回一个etag头,但是我的客户机无法读取它,因为它没有公开。我有以下代码:
@Configuration
public class WebConfig implements WebMvcConfigurer {
@Override
public void addCorsMappings(@NonNull CorsRegistry registry) {
registry.addMapping("/**")
.allowedHeaders("*")
.allowedMethods("*")
.allowedOrigins("*")
.exposedHeaders("ETag");
}
@Bean
public ShallowEtagHeaderFilter shallowEtagHeaderFilter() {
return new ShallowEtagHeaderFilter();
}
}
但是客户端仍然无法读取etag。唯一有效的方法是:
@ApiResponses({
@ApiResponse(code = 200, message = "OK"),
@ApiResponse(code = 500, message = "System Error")
})
@ApiOperation(value = "returns the meals", response = MealDTO.class, responseContainer = "List", produces = MediaType.APPLICATION_JSON_VALUE)
@GetMapping("/meal")
public List<MealDTO> getMeals(
@ApiParam(name = "page", type = "Integer", value = "Number of the page", example = "2")
@RequestParam(required = false) Integer page,
@ApiParam(name = "size", type = "Integer", value = "The size of one page", example = "5")
@RequestParam(required = false) Integer size,
@ApiParam(name = "sortBy", type = "String", value = "sort criteria", example = "name.asc,price.desc")
@RequestParam(required = false) String sortBy,
@ApiParam(name = "userId", type = "long", value = "ID of the User", example = "-1")
@PathVariable Long userId,
HttpServletResponse response
) {
log.debug("Entered class = MealController & method = getMeals");
response.setHeader("Access-Control-Expose-Headers", "ETag");
return this.mealService.getMealsByUserId(page, size, sortBy, userId);
}
为每个端点手动设置公开的标头。这张Map不是应该做的吗?ExposedHeader根本不适合我。
更新:
从下面的评论中,我看到它可能与websecurityconfigureradapter有关,我还补充说:
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
private final UserDetailsService userDetailsService;
public WebSecurityConfig(@Qualifier("userServiceImpl") UserDetailsService userDetailsService) {
this.userDetailsService = userDetailsService;
}
@Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
auth.userDetailsService(userDetailsService);
}
@Override
protected void configure(HttpSecurity http) throws Exception {
http.csrf().disable()
.cors()
.and()
.addFilter(new AuthenticationFilter(authenticationManager()))
.addFilter(new AuthorizationFilter(authenticationManager()))
.sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS);
// http.headers().cacheControl().disable();
}
//region Beans
@Bean
@Override
public AuthenticationManager authenticationManagerBean() throws Exception {
return super.authenticationManagerBean();
}
@Bean
public PasswordEncoder passwordEncoder() {
return new BCryptPasswordEncoder();
}
@Bean
CorsConfigurationSource corsConfigurationSource() {
CorsConfiguration configuration = new CorsConfiguration();
configuration.setAllowedOrigins(Collections.singletonList("*"));
configuration.setAllowedMethods(Collections.singletonList("*"));
configuration.setAllowedHeaders(Collections.singletonList("*"));
configuration.setAllowCredentials(true);
UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
source.registerCorsConfiguration("/**", configuration);
return source;
}
//endregion
}
更新2:
显示我是如何从我的客户那里打电话的:
export const getMealByIdApi: (mealId: number, etag: string | null) => Promise<Meal | void> = (mealId, etag) => {
let _config = config;
if (etag) {
_config.headers['If-None-Match'] = etag;
}
return axiosInstance
.get<Meal>(`/meal/${mealId}`, _config)
.then(response => {
log(`[getMealByIdApi] [${response.status}] Successful API call for meal with id ${mealId}.`);
const result: Meal = response.data;
result.etag = response.headers['etag'];
return result;
})
.catch(err => {
if (err.response.status === 304) {
log(`[getMealByIdApi] [304] Successful API call for meal with id ${mealId}.`);
return;
}
throw err;
});
}
如果我没有在endpoint中显式指定response.setheader(“access control expose headers”,“etag”),那么头中就没有etag;
1条答案
按热度按时间rpppsulh1#
根据axios获取对响应头字段的访问权限。我们需要将“etag”添加到“access control expose headers”中,这样我们就可以访问
response.headers['etag']
. 因为你已经添加了ShallowEtagHeaderFilter
还曝光了addCorsMappings
. "应将“etag”添加到cors请求的响应头“access control expose headers”中。为了确保您的请求是cors,您可以调试
DefaultCorsProcessor#processRequest
方法,并检查CorsUtils.isCorsRequest(request)
返回真值。如果返回false,您可以从
CorsUtils#isCorsRequest
说明:如果请求是有效的cors请求,则通过检查源报头的存在并确保源不同,返回true。