How to get access token from facebook using spring boot security

Question

I have to get the access token from facebook using spring security, I have the following code for HTTP configuration

@Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                .antMatcher("/**")
                .authorizeRequests()
                .antMatchers("/", "/login**", "/webjars/**")
                .permitAll()
                .anyRequest()
                .authenticated().and().exceptionHandling().authenticationEntryPoint(new LoginUrlAuthenticationEntryPoint("/"))
        .and().logout().logoutSuccessUrl("/").permitAll()
        .and().csrf().csrfTokenRepository(CookieCsrfTokenRepository.withHttpOnlyFalse())
        .and().addFilterBefore(ssoFilter(), BasicAuthenticationFilter.class);
    }

Also, I am able to get the principal after login to facebook. But I need to get the logged in user access token.

These are the dependencies that I use for spring boot security,

    implementation 'org.springframework.boot:spring-boot-starter-oauth2-client'
    implementation 'org.springframework.boot:spring-boot-starter-oauth2-resource-server'
    implementation 'org.springframework.boot:spring-boot-starter-security'
    compile group: 'org.springframework.security.oauth.boot', name: 'spring-security-oauth2-autoconfigure', version: '2.1.3.RELEASE'

This is the filter that I am using,

private Filter ssoFilter() {
    OAuth2ClientAuthenticationProcessingFilter facebookFilter = new OAuth2ClientAuthenticationProcessingFilter("/login/facebook");
    OAuth2RestTemplate facebookTemplate = new OAuth2RestTemplate(facebook(), oauth2ClientContext);
    facebookFilter.setRestTemplate(facebookTemplate);
    UserInfoTokenServices tokenServices = new UserInfoTokenServices(facebookResource().getUserInfoUri(), facebook().getClientId());

    tokenServices.setRestTemplate(facebookTemplate);
    facebookFilter.setTokenServices(tokenServices);

    return facebookFilter;
}

Is there any way to get the access token using spring boot security

Answer 1

If the facebook integration is correct with spring security, you could inject:

@Autowired
OAuth2ClientContext oAuth2ClientContext;

and with this object obtain the token:

oAuth2ClientContext.getAccessToken().getValue();