package io.spring.site.web.security;

import io.spring.site.domain.team.MemberProfile;
import io.spring.site.domain.team.SignInService;

import org.springframework.security.authentication.BadCredentialsException;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.authority.AuthorityUtils;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.social.connect.Connection;
import org.springframework.social.connect.web.SignInAdapter;
import org.springframework.social.github.api.GitHub;
import org.springframework.web.client.RestClientException;
import org.springframework.web.context.request.NativeWebRequest;

public class GithubAuthenticationSigninAdapter implements SignInAdapter {


    private String path;
    private final SignInService signInService;

    public GithubAuthenticationSigninAdapter(String path, SignInService signInService) {
        this.path = path;
        this.signInService = signInService;
    }

    @Override
    public String signIn(String githubId, Connection<?> connection,
            NativeWebRequest request) {
        GitHub gitHub = (GitHub) connection.getApi();
        String githubUsername = connection.getDisplayName();

        try {
            if (!signInService.isSpringMember(githubUsername, gitHub)) {
                throw new BadCredentialsException("User not member of required org");
            }

            MemberProfile member = signInService.getOrCreateMemberProfile(new Long(githubId), gitHub);
            Authentication authentication = new UsernamePasswordAuthenticationToken(
                    member.getId(), member.getGithubUsername(),
                    AuthorityUtils.commaSeparatedStringToAuthorityList("ROLE_USER"));
            SecurityContextHolder.getContext().setAuthentication(authentication);
            return path;

        } catch (RestClientException e) {
            throw new BadCredentialsException("User not member of required org");
        }
    }

}
package io.spring.site.web.security;

import io.spring.site.domain.team.MemberProfile;
import io.spring.site.domain.team.SignInService;

import org.springframework.security.authentication.BadCredentialsException;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.authority.AuthorityUtils;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.social.connect.Connection;
import org.springframework.social.connect.web.SignInAdapter;
import org.springframework.social.github.api.GitHub;
import org.springframework.web.client.RestClientException;
import org.springframework.web.context.request.NativeWebRequest;

public class GithubAuthenticationSigninAdapter implements SignInAdapter {


    private String path;
    private final SignInService signInService;

    public GithubAuthenticationSigninAdapter(String path, SignInService signInService) {
        this.path = path;
        this.signInService = signInService;
    }

    @Override
    public String signIn(String githubId, Connection<?> connection,
            NativeWebRequest request) {
        GitHub gitHub = (GitHub) connection.getApi();
        String githubUsername = connection.getDisplayName();

        try {
            if (!signInService.isSpringMember(githubUsername, gitHub)) {
                throw new BadCredentialsException("User not member of required org");
            }

            MemberProfile member = signInService.getOrCreateMemberProfile(new Long(githubId), gitHub);
            Authentication authentication = new UsernamePasswordAuthenticationToken(
                    member.getId(), member.getGithubUsername(),
                    AuthorityUtils.commaSeparatedStringToAuthorityList("ROLE_USER"));
            SecurityContextHolder.getContext().setAuthentication(authentication);
            return path;

        } catch (RestClientException ex) {
            throw new BadCredentialsException("User not member of required org", ex);
        }
    }

}
Improve error reporting when sign in via GitHub fails