IssueAccessTokenServlet.java

package com.github.hburgmeier.jerseyoauth2.authsrv.impl.endpoints.servlet;

import java.io.IOException;

import javax.inject.Inject;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.github.hburgmeier.jerseyoauth2.api.protocol.IAccessTokenRequest;
import com.github.hburgmeier.jerseyoauth2.api.protocol.IRequestFactory;
import com.github.hburgmeier.jerseyoauth2.api.protocol.OAuth2ParseException;
import com.github.hburgmeier.jerseyoauth2.api.protocol.OAuth2ProtocolException;
import com.github.hburgmeier.jerseyoauth2.api.protocol.ResponseBuilderException;
import com.github.hburgmeier.jerseyoauth2.authsrv.api.IConfiguration;
import com.github.hburgmeier.jerseyoauth2.authsrv.api.protocol.IHttpContext;
import com.github.hburgmeier.jerseyoauth2.authsrv.api.protocol.IOAuth2Response;
import com.github.hburgmeier.jerseyoauth2.authsrv.api.token.ITokenService;
import com.github.hburgmeier.jerseyoauth2.authsrv.api.ui.AuthorizationFlowException;
import com.github.hburgmeier.jerseyoauth2.authsrv.impl.protocol.response.HttpServletContextImplementation;
import com.github.hburgmeier.jerseyoauth2.protocol.impl.HttpRequestAdapter;
import com.google.inject.Singleton;

@Singleton
public class IssueAccessTokenServlet extends HttpServlet {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	
	private static final Logger LOGGER = LoggerFactory.getLogger(IssueAccessTokenServlet.class);
	
	private final ITokenService tokenService;
	private final IConfiguration configuration;
	private final IRequestFactory requestFactory;
	
	@Inject
	public IssueAccessTokenServlet(final ITokenService tokenService, final IConfiguration configuration, final IRequestFactory requestFactory) {
		this.tokenService = tokenService;
		this.configuration = configuration;
		this.requestFactory = requestFactory;
	}

	@Override
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException,
			IOException {

		IHttpContext context = new HttpServletContextImplementation(request, response, getServletContext());
		try {
			IAccessTokenRequest oauthRequest = null;
			try {
				oauthRequest = requestFactory.parseAccessTokenRequest(new HttpRequestAdapter(request), 
						configuration.getEnableAuthorizationHeaderForClientAuth());
				LOGGER.debug("Parsing OAuthTokenRequest successful");

				IOAuth2Response oauth2Response = tokenService.handleRequest(request, oauthRequest);
				oauth2Response.render(context);
			} catch (OAuth2ParseException e) {
				LOGGER.error("Token request problem", e);
				IOAuth2Response oauth2Response = tokenService.sendErrorResponse(oauthRequest,e);
				oauth2Response.render(context);
			} catch (OAuth2ProtocolException e) {
				LOGGER.error("Token request problem", e);
				IOAuth2Response oauth2Response = tokenService.sendErrorResponse(oauthRequest, e);
				oauth2Response.render(context);	
			}
		} catch (AuthorizationFlowException | ResponseBuilderException e) {
			LOGGER.error("OAuth2 system exception", e);
			throw new ServletException(e);
		}
	}

}