SpringSecurityOAuth核心源碼解析

TokenEndpoint

@FrameworkEndpoint
public class TokenEndpoint extends AbstractEndpoint {

	private OAuth2RequestValidator oAuth2RequestValidator = new DefaultOAuth2RequestValidator();

	private Set<HttpMethod> allowedRequestMethods = new HashSet<HttpMethod>(Arrays.asList(HttpMethod.POST));

	@RequestMapping(value = "/oauth/token", method=RequestMethod.GET)
	public ResponseEntity<OAuth2AccessToken> getAccessToken(Principal principal, @RequestParam
	Map<String, String> parameters) throws HttpRequestMethodNotSupportedException {
		if (!allowedRequestMethods.contains(HttpMethod.GET)) {
			throw new HttpRequestMethodNotSupportedException("GET");
		}
		return postAccessToken(principal, parameters);
	}
	
	@RequestMapping(value = "/oauth/token", method=RequestMethod.POST)
	public ResponseEntity<OAuth2AccessToken> postAccessToken(Principal principal, @RequestParam
	Map<String, String> parameters) throws HttpRequestMethodNotSupportedException {

		if (!(principal instanceof Authentication)) {
			throw new InsufficientAuthenticationException(
					"There is no client authentication. Try adding an appropriate authentication filter.");
		}

		String clientId = getClientId(principal);
		ClientDetails authenticatedClient = getClientDetailsService().loadClientByClientId(clientId);

		TokenRequest tokenRequest = getOAuth2RequestFactory().createTokenRequest(parameters, authenticatedClient);

		if (clientId != null && !clientId.equals("")) {
			// Only validate the client details if a client authenticated during this
			// request.
			if (!clientId.equals(tokenRequest.getClientId())) {
				// double check to make sure that the client ID in the token request is the same as that in the
				// authenticated client
				throw new InvalidClientException("Given client ID does not match authenticated client");
			}
		}
		if (authenticatedClient != null) {
			oAuth2RequestValidator.validateScope(tokenRequest, authenticatedClient);
		}
		if (!StringUtils.hasText(tokenRequest.getGrantType())) {
			throw new InvalidRequestException("Missing grant type");
		}
		if (tokenRequest.getGrantType().equals("implicit")) {
			throw new InvalidGrantException("Implicit grant type not supported from token endpoint");
		}

		if (isAuthCodeRequest(parameters)) {
			// The scope was requested or determined during the authorization step
			if (!tokenRequest.getScope().isEmpty()) {
				logger.debug("Clearing scope of incoming token request");
				tokenRequest.setScope(Collections.<String> emptySet());
			}
		}

		if (isRefreshTokenRequest(parameters)) {
			// A refresh token has its own default scopes, so we should ignore any added by the factory here.
			tokenRequest.setScope(OAuth2Utils.parseParameterList(parameters.get(OAuth2Utils.SCOPE)));
		}

		OAuth2AccessToken token = getTokenGranter().grant(tokenRequest.getGrantType(), tokenRequest);
		if (token == null) {
			throw new UnsupportedGrantTypeException("Unsupported grant type: " + tokenRequest.getGrantType());
		}

		return getResponse(token);

	}

ClientDetails、ClientDetailsService

/**
 * A service that provides the details about an OAuth2 client.
 *
 * @author Ryan Heaton
 */
public interface ClientDetailsService {

  /**
   * Load a client by the client id. This method must not return null.
   *
   * @param clientId The client id.
   * @return The client details (never null).
   * @throws ClientRegistrationException If the client account is locked, expired, disabled, or invalid for any other reason.
   */
  ClientDetails loadClientByClientId(String clientId) throws ClientRegistrationException;

}