/*******************************************************************************
 * Copyright 2017 Bstek
 *
 * 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 com.bstek.ureport.console.res;

import com.bstek.ureport.console.ServletAction;
import com.bstek.ureport.console.UReportServlet;
import jakarta.servlet.ServletException;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.apache.commons.io.IOUtils;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/**
 * @author Jacky.gao
 * @since 2016年6月6日
 */
public class ResourceLoaderServletAction implements ServletAction, ApplicationContextAware {
	public static final String URL = "/res";
	private ApplicationContext applicationContext;

	@Override
	public void execute(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		String path = req.getContextPath() + UReportServlet.URL + URL;
		String uri = req.getRequestURI();
		String resPath = uri.substring(path.length() + 1);
		String p = "classpath:" + resPath;
		if (p.endsWith(".js")) {
			resp.setContentType("text/javascript");
		} else if (p.endsWith(".css")) {
			resp.setContentType("text/css");
		} else if (p.endsWith(".png")) {
			resp.setContentType("image/png");
		} else if (p.endsWith(".jpg")) {
			resp.setContentType("image/jpeg");
		} else if (p.endsWith(".svg")) {
			resp.setContentType("image/svg+xml");
		} else {
			resp.setContentType("application/octet-stream");
		}
		InputStream input = applicationContext.getResource(p).getInputStream();
		OutputStream output = resp.getOutputStream();
		try {
			IOUtils.copy(input, output);
		} finally {
			IOUtils.closeQuietly(input);
			IOUtils.closeQuietly(output);
		}
	}

	@Override
	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		this.applicationContext = applicationContext;
	}

	@Override
	public String url() {
		return URL;
	}
}
