de.ifgi.mosia.wpswfs.handler.GenericRequestHandler.java Source code

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Here is the source code for de.ifgi.mosia.wpswfs.handler.GenericRequestHandler.java

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/**
 * Copyright (C) 2014
 * by Institute for Geoinformatics, University of Muenster
 *
 * Contact: http://www.ifgi.de
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package de.ifgi.mosia.wpswfs.handler;

import java.io.IOException;
import java.util.Map;

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

import org.apache.http.HttpResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.inject.Singleton;

import de.ifgi.mosia.wpswfs.ServiceException;

@Singleton
public class GenericRequestHandler extends ProxyRequestHandler implements RequestHandler {

    private static final Logger logger = LoggerFactory.getLogger(GenericRequestHandler.class);

    @Override
    public boolean supportsRequestType(String request) {
        return true;
    }

    @Override
    public boolean supportsHttpGet() {
        return true;
    }

    @Override
    public boolean supportsHttpPost() {
        return true;
    }

    @Override
    public void handleRequest(HttpServletRequest req, HttpServletResponse resp)
            throws IOException, ServiceException {
        HttpResponse response;
        if (req.getMethod().equalsIgnoreCase("GET")) {
            response = handleGet(req, resp);
        } else {
            throw new UnsupportedOperationException("Only GET and POST are supported.");
        }

        writeResponse(response, resp);
    }

    protected HttpResponse handlePost(String content, String enc, HttpServletResponse resp)
            throws IOException, ServiceException {
        HttpResponse response;

        try {
            response = executeHttpPost(content, enc);
        } catch (IOException e) {
            logger.warn(e.getMessage(), e);
            throw new IOException("Proxy server issue: " + e.getMessage());
        }

        return response;
    }

    @SuppressWarnings("unchecked")
    protected HttpResponse handleGet(HttpServletRequest req, HttpServletResponse resp)
            throws IOException, ServiceException {
        HttpResponse response;
        try {
            response = executeHttpGet((Map<String, String[]>) req.getParameterMap());
        } catch (IOException e) {
            logger.warn(e.getMessage(), e);
            throw new IOException("Proxy server issue: " + e.getMessage());
        }

        return response;
    }

    @Override
    public boolean supportsPostPayload(String payload) {
        return true;
    }

    @Override
    public void handlePostRequest(HttpServletRequest req, HttpServletResponse resp, String payload, String encoding)
            throws IOException, ServiceException {
        writeResponse(handlePost(payload, encoding, resp), resp);
    }

}