org.infoscoop.api.oauth2.provider.ISOAuth2ExceptionRenderer.java Source code

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Here is the source code for org.infoscoop.api.oauth2.provider.ISOAuth2ExceptionRenderer.java

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/*
 *  infoScoop OpenSource
 * Copyright (C) 2010 Beacon IT Inc.
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * as published by the Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/lgpl-3.0-standalone.html>.
 */

package org.infoscoop.api.oauth2.provider;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpInputMessage;
import org.springframework.http.HttpOutputMessage;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.http.server.ServletServerHttpRequest;
import org.springframework.http.server.ServletServerHttpResponse;
import org.springframework.security.oauth2.http.converter.jaxb.JaxbOAuth2ExceptionMessageConverter;
import org.springframework.security.oauth2.provider.error.OAuth2ExceptionRenderer;
import org.springframework.web.HttpMediaTypeNotAcceptableException;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.context.request.ServletWebRequest;

public class ISOAuth2ExceptionRenderer implements OAuth2ExceptionRenderer {
    private static Log log = LogFactory.getLog(ISOAuth2ExceptionRenderer.class);

    private List<HttpMessageConverter<?>> messageConverters = geDefaultMessageConverters();

    public void setMessageConverters(List<HttpMessageConverter<?>> messageConverters) {
        this.messageConverters = messageConverters;
    }

    public void handleHttpEntityResponse(HttpEntity<?> responseEntity, ServletWebRequest webRequest)
            throws Exception {
        if (responseEntity == null) {
            return;
        }
        HttpInputMessage inputMessage = createHttpInputMessage(webRequest);
        HttpOutputMessage outputMessage = createHttpOutputMessage(webRequest);
        HttpStatus statusCode = null;
        if (responseEntity instanceof ResponseEntity && outputMessage instanceof ServerHttpResponse) {
            statusCode = ((ResponseEntity<?>) responseEntity).getStatusCode();
            ((ServerHttpResponse) outputMessage).setStatusCode(statusCode);
        }
        HttpHeaders entityHeaders = responseEntity.getHeaders();
        if (!entityHeaders.isEmpty()) {
            outputMessage.getHeaders().putAll(entityHeaders);
        }
        Object body = responseEntity.getBody();
        if (body != null) {
            writeWithMessageConverters(body, inputMessage, outputMessage, statusCode, webRequest.getRequest());
        } else {
            // flush headers
            outputMessage.getBody();
        }
    }

    @SuppressWarnings({ "unchecked", "rawtypes" })
    private void writeWithMessageConverters(Object returnValue, HttpInputMessage inputMessage,
            HttpOutputMessage outputMessage, HttpStatus status, HttpServletRequest request)
            throws IOException, HttpMediaTypeNotAcceptableException {
        log.info(request.getRemoteAddr() + " " + returnValue + " " + status.value());

        Class<?> returnValueType = returnValue.getClass();
        List<MediaType> allSupportedMediaTypes = new ArrayList<MediaType>();

        String fileType = request.getPathInfo();
        MediaType acceptedMediaType = MediaType.APPLICATION_JSON;
        if (fileType.substring(fileType.lastIndexOf(".") + 1).equals("xml"))
            acceptedMediaType = MediaType.APPLICATION_XML;

        for (HttpMessageConverter messageConverter : messageConverters) {
            if (messageConverter.canWrite(returnValueType, acceptedMediaType)) {
                messageConverter.write(returnValue, acceptedMediaType, outputMessage);
                if (log.isDebugEnabled()) {
                    MediaType contentType = outputMessage.getHeaders().getContentType();
                    if (contentType == null) {
                        contentType = acceptedMediaType;
                    }
                    log.debug("Written [" + returnValue + "] as \"" + contentType + "\" using [" + messageConverter
                            + "]");
                }
                return;
            }
        }

        for (HttpMessageConverter messageConverter : messageConverters) {
            allSupportedMediaTypes.addAll(messageConverter.getSupportedMediaTypes());
        }
        throw new HttpMediaTypeNotAcceptableException(allSupportedMediaTypes);
    }

    private List<HttpMessageConverter<?>> geDefaultMessageConverters() {
        List<HttpMessageConverter<?>> result = new ArrayList<HttpMessageConverter<?>>();
        result.addAll(new RestTemplate().getMessageConverters());
        result.add(new JaxbOAuth2ExceptionMessageConverter());
        return result;
    }

    private HttpInputMessage createHttpInputMessage(NativeWebRequest webRequest) throws Exception {
        HttpServletRequest servletRequest = webRequest.getNativeRequest(HttpServletRequest.class);
        return new ServletServerHttpRequest(servletRequest);
    }

    private HttpOutputMessage createHttpOutputMessage(NativeWebRequest webRequest) throws Exception {
        HttpServletResponse servletResponse = (HttpServletResponse) webRequest.getNativeResponse();
        return new ServletServerHttpResponse(servletResponse);
    }

}