Spring Boot #EnableResourceServer unexpected 401 Unauthorized error [duplicate] - spring-boot

Question

I have created two web applications - client and service apps.The interaction between client and service apps goes fine when they are deployed in same Tomcat instance.
But when the apps are deployed into seperate Tomcat instances (different machines), I get the below error when request to sent service app.
Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.
Origin 'http://localhost:8080' is therefore not allowed access. The response had HTTP status code 401
My Client application uses JQuery, HTML5 and Bootstrap.
AJAX call is made to service as shown below:
var auth = "Basic " + btoa({usname} + ":" + {password});
var service_url = {serviceAppDomainName}/services;
if($("#registrationForm").valid()){
var formData = JSON.stringify(getFormData(registrationForm));
$.ajax({
url: service_url+action,
dataType: 'json',
async: false,
type: 'POST',
headers:{
"Authorization":auth
},
contentType: 'application/json',
data: formData,
success: function(data){
//success code
},
error: function( jqXhr, textStatus, errorThrown ){
alert( errorThrown );
});
}
My service application uses Spring MVC, Spring Data JPA and Spring Security.
I have included CorsConfiguration class as shown below:
CORSConfig.java:
#Configuration
#EnableWebMvc
public class CORSConfig extends WebMvcConfigurerAdapter {
#Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("*");
}
}
SecurityConfig.java:
#Configuration
#EnableGlobalMethodSecurity(prePostEnabled = true)
#EnableWebSecurity
#ComponentScan(basePackages = "com.services", scopedProxy = ScopedProxyMode.INTERFACES)
public class SecurityConfig extends WebSecurityConfigurerAdapter {
#Autowired
#Qualifier("authenticationService")
private UserDetailsService userDetailsService;
#Bean
#Override
public AuthenticationManager authenticationManagerBean() throws Exception {
return super.authenticationManagerBean();
}
#Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
auth.userDetailsService(userDetailsService);
auth.authenticationProvider(authenticationProvider());
}
#Override
protected void configure(HttpSecurity http) throws Exception {
http
.authorizeRequests()
.antMatchers("/login").permitAll()
.anyRequest().fullyAuthenticated();
http.httpBasic();
http.sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS);
http.csrf().disable();
}
#Bean
public PasswordEncoder passwordEncoder() {
return new BCryptPasswordEncoder();
}
#Bean
public DaoAuthenticationProvider authenticationProvider() {
DaoAuthenticationProvider authenticationProvider = new DaoAuthenticationProvider();
authenticationProvider.setUserDetailsService(userDetailsService);
authenticationProvider.setPasswordEncoder(passwordEncoder());
return authenticationProvider;
}
}
Spring Security dependencies:
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
<version>3.2.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
<version>3.2.3.RELEASE</version>
</dependency>
I am using Apache Tomcat server for deployment.

Answer 1

CORS' preflight request uses HTTP OPTIONS without credentials, see Cross-Origin Resource Sharing:
Otherwise, make a preflight request. Fetch the request URL from origin source origin using referrer source as override referrer source with the manual redirect flag and the block cookies flag set, using the method OPTIONS, and with the following additional constraints:
Include an Access-Control-Request-Method header with as header field value the request method (even when that is a simple method).
If author request headers is not empty include an Access-Control-Request-Headers header with as header field value a comma-separated list of the header field names from author request headers in lexicographical order, each converted to ASCII lowercase (even when one or more are a simple header).
Exclude the author request headers.
Exclude user credentials.
Exclude the request entity body.
You have to allow anonymous access for HTTP OPTIONS.
Spring Security 3
Your modified (and simplified) code:
#Override
protected void configure(HttpSecurity http) throws Exception {
http
.authorizeRequests()
.antMatchers(HttpMethod.OPTIONS, "/**").permitAll()
.antMatchers("/login").permitAll()
.anyRequest().fullyAuthenticated()
.and()
.httpBasic()
.and()
.sessionManagement()
.sessionCreationPolicy(SessionCreationPolicy.STATELESS)
.and()
.csrf().disable();
}
You still need your CORS configuration (probably with some additional values):
#Configuration
#EnableWebMvc
public class CORSConfig extends WebMvcConfigurerAdapter {
#Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("*");
}
}
Spring Security 4
Since Spring Security 4.2.0 you can use the built-in support, see Spring Security Reference:
19. CORS
Spring Framework provides first class support for CORS. CORS must be processed before Spring Security because the pre-flight request will not contain any cookies (i.e. the JSESSIONID). If the request does not contain any cookies and Spring Security is first, the request will determine the user is not authenticated (since there are no cookies in the request) and reject it.
The easiest way to ensure that CORS is handled first is to use the CorsFilter. Users can integrate the CorsFilter with Spring Security by providing a CorsConfigurationSource using the following:
#EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
#Override
protected void configure(HttpSecurity http) throws Exception {
http
// by default uses a Bean by the name of corsConfigurationSource
.cors().and()
...
}
#Bean
CorsConfigurationSource corsConfigurationSource() {
CorsConfiguration configuration = new CorsConfiguration();
configuration.setAllowedOrigins(Arrays.asList("https://example.com"));
configuration.setAllowedMethods(Arrays.asList("GET","POST"));
UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
source.registerCorsConfiguration("/**", configuration);
return source;
}
}
Spring Security 5/6
For Spring Security 5/6 see Spring Security Reference:
CORS
Spring Framework provides first class support for CORS. CORS must be processed before Spring Security, because the pre-flight request does not contain any cookies (that is, the JSESSIONID). If the request does not contain any cookies and Spring Security is first, the request determines that the user is not authenticated (since there are no cookies in the request) and rejects it.
The easiest way to ensure that CORS is handled first is to use the CorsFilter. Users can integrate the CorsFilter with Spring Security by providing a CorsConfigurationSource that uses the following:
#Configuration
#EnableWebSecurity
public class WebSecurityConfig {
#Bean
public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
http
// by default uses a Bean by the name of corsConfigurationSource
.cors(withDefaults())
...
return http.build();
}
#Bean
CorsConfigurationSource corsConfigurationSource() {
CorsConfiguration configuration = new CorsConfiguration();
configuration.setAllowedOrigins(Arrays.asList("https://example.com"));
configuration.setAllowedMethods(Arrays.asList("GET","POST"));
UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
source.registerCorsConfiguration("/**", configuration);
return source;
}
}
With Spring Security 5/6 you don't need to configure CORS twice (Spring Security and Spring MVC):
If you use Spring MVC’s CORS support, you can omit specifying the CorsConfigurationSource and Spring Security uses the CORS configuration provided to Spring MVC:

Answer 2

Since Spring Security 4.1, this is the proper way to make Spring Security support CORS (also needed in Spring Boot 1.4/1.5):
#Configuration
public class WebConfig extends WebMvcConfigurerAdapter {
#Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/**")
.allowedMethods("HEAD", "GET", "PUT", "POST", "DELETE", "PATCH");
}
}
and:
#Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {
#Override
protected void configure(HttpSecurity http) throws Exception {
// http.csrf().disable();
http.cors();
}
#Bean
public CorsConfigurationSource corsConfigurationSource() {
final CorsConfiguration configuration = new CorsConfiguration();
configuration.setAllowedOrigins(ImmutableList.of("*"));
configuration.setAllowedMethods(ImmutableList.of("HEAD",
"GET", "POST", "PUT", "DELETE", "PATCH"));
// setAllowCredentials(true) is important, otherwise:
// The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'.
configuration.setAllowCredentials(true);
// setAllowedHeaders is important! Without it, OPTIONS preflight request
// will fail with 403 Invalid CORS request
configuration.setAllowedHeaders(ImmutableList.of("Authorization", "Cache-Control", "Content-Type"));
final UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
source.registerCorsConfiguration("/**", configuration);
return source;
}
}
Do not do any of below, which are the wrong way to attempt solving the problem:
http.authorizeRequests().antMatchers(HttpMethod.OPTIONS, "/**").permitAll();
web.ignoring().antMatchers(HttpMethod.OPTIONS);
Reference: http://docs.spring.io/spring-security/site/docs/4.2.x/reference/html/cors.html

Answer 3

In my case, I have Resource Server with OAuth security enabled and any of above solutions didn't work. After some debugging and googling figured why.
#Bean
public FilterRegistrationBean corsFilter() {
UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
CorsConfiguration config = new CorsConfiguration();
config.setAllowCredentials(true);
config.addAllowedOrigin("*");
config.addAllowedHeader("*");
config.addAllowedMethod("*");
source.registerCorsConfiguration("/**", config);
FilterRegistrationBean bean = new FilterRegistrationBean(new CorsFilter(source));
bean.setOrder(Ordered.HIGHEST_PRECEDENCE);
return bean;
}
Basically in this example Ordered.HIGHEST_PRECEDENCE is key!
https://github.com/spring-projects/spring-security-oauth/issues/938
Various pom dependencies add different kinds of filters and therefore we could have issues based on order.

Answer 4

Add the below configuration in the main application. It worked me in spring boot application 2.3.1
package com.example.restservicecors;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
#SpringBootApplication
public class RestServiceCorsApplication {
public static void main(String[] args) {
SpringApplication.run(RestServiceCorsApplication.class, args);
}
#Bean
public WebMvcConfigurer corsConfigurer() {
return new WebMvcConfigurer() {
#Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/**").allowedOrigins("*").allowedHeaders("*").allowedMethods("*");
}
};
}
}
Reference source: https://spring.io/guides/gs/rest-service-cors/

Answer 5

Since none of this posted examples helped me, I've taken things in my own knowledge.
In this method:
#Bean
CorsConfigurationSource corsConfigurationSource() {
CorsConfiguration cors = new CorsConfiguration();
cors.setAllowedMethods(Arrays.asList("POST", "GET", "PUT", "HEAD", "DELETE"));
UrlBasedCorsConfigurationSource source = new
UrlBasedCorsConfigurationSource();
source.registerCorsConfiguration("/**", new CorsConfiguration().applyPermitDefaultValues());
return source;
}
CorsConfiguration by default have allowed method: POST, HEAD, GET, so PUT, DELETE will not work. What I did is I created a new instance of CorsConfiguration and set allowed methods:
cors.setAllowedMethods(Arrays.asList("POST", "GET", "PUT", "HEAD", "DELETE"));
so now my method looks like:
#Bean
CorsConfigurationSource corsConfigurationSource() {
CorsConfiguration cors = new CorsConfiguration();
cors.setAllowedMethods(Arrays.asList("POST", "GET", "PUT", "HEAD", "DELETE"));
UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
source.registerCorsConfiguration("/**", cors.applyPermitDefaultValues());
return source;
}
Of course, all other configuration is made by Spring documentation.

Answer 6

Try this:
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.core.Ordered;
import org.springframework.stereotype.Component;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;
import java.util.Arrays;
import java.util.List;
#Component
public class CorsFilterConfig {
public static final List<String> allowedOrigins = Arrays.asList("*");
#Bean
public FilterRegistrationBean<CorsFilter> initCorsFilter() {
// #formatter:off
UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
CorsConfiguration config = new CorsConfiguration();
config.setAllowCredentials(true);
config.setAllowedHeaders(Arrays.asList("Authorization", "Cache-Control", "Content-Type"));
config.addAllowedMethod("*");
config.setAllowedOrigins(allowedOrigins);
source.registerCorsConfiguration("/**", config);
FilterRegistrationBean<CorsFilter> bean = new FilterRegistrationBean<>(new CorsFilter(source));
bean.setOrder(Ordered.HIGHEST_PRECEDENCE);
return bean;
// #formatter:on
}
}

Answer 7

You can easily add the #CrossOrigin annotation to allow all of them if you use UsernamePasswordAuthenticationFilter. And in the security configurations the http.cors().and(). This worked for me.
#CrossOrigin(origins = "*")
public class CustomAuthenticationFilter extends UsernamePasswordAuthenticationFilter {
private final AuthenticationManager authenticationManager;
#Override
protected void configure(HttpSecurity http) throws Exception {
CustomAuthenticationFilter customAuthenticationFilter = new CustomAuthenticationFilter(authenticationManagerBean());
customAuthenticationFilter.setFilterProcessesUrl("/api/login");
http
.csrf().disable();
http
.sessionManagement()
.sessionCreationPolicy(SessionCreationPolicy.STATELESS);
// We can ant match out paths to the corresponding roles --> we allow certain roles to access certain API's
http
.cors()
.and();
http
.authorizeRequests()
.antMatchers(HttpMethod.POST, "/**").permitAll();
...

Answer 8

This worked for: spring-boot-starter-parent 2.2.6.RELEASE
#Configuration
#EnableWebMvc
public class WebConfig implements WebMvcConfigurer {
#Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/**").allowedOrigins("*").allowedHeaders("*").allowedMethods("*");
}
}
Change "*" to something meaningful in prod