/*
* Copyright (c) 2005-2010, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* WSO2 Inc. licenses this file to you 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 org.wso2.carbon.registry.resource.servlets;
import org.wso2.carbon.registry.core.RegistryConstants;
import org.wso2.carbon.registry.core.exceptions.RegistryException;
import org.wso2.carbon.registry.core.session.UserRegistry;
import org.wso2.carbon.registry.core.Resource;
import org.wso2.carbon.registry.core.Collection;
import org.wso2.carbon.registry.core.utils.RegistryUtils;
import org.wso2.carbon.registry.resource.services.utils.CommonUtil;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
public class ResourceServlet extends HttpServlet {
private static final Log log = LogFactory.getLog(ResourceServlet.class);
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
UserRegistry registry = (UserRegistry) request.getSession().getAttribute(
RegistryConstants.ROOT_REGISTRY_INSTANCE);
String path = request.getParameter("path");
if (path == null) {
String msg = "Could not get the resource content. Path is not specified.";
log.error(msg);
response.setStatus(400);
return;
}
Resource resource = null;
try {
resource = registry.get(path);
} catch (RegistryException e) {
String msg = "Error retrieving the resource " + path + ". " + e.getMessage();
log.error(msg, e);
throw e;
}
if (resource instanceof Collection) {
String msg = "Could not get the resource content. Path " + path + " refers to a collection.";
log.error(msg);
response.setStatus(501);
return;
}
response.setDateHeader("Last-Modified", resource.getLastModified().getTime());
if (resource.getMediaType() != null && resource.getMediaType().length() > 0) {
response.setContentType(resource.getMediaType());
} else {
response.setHeader(
"Content-Disposition", "attachment; filename=" + RegistryUtils.getResourceName(path));
response.setContentType("application/download");
}
InputStream contentStream = resource.getContentStream();
if (contentStream != null) {
try {
ServletOutputStream servletOutputStream = response.getOutputStream();
byte[] contentChunk = new byte[1024];
int byteCount;
while ((byteCount = contentStream.read(contentChunk)) != -1) {
servletOutputStream.write(contentChunk, 0, byteCount);
}
response.flushBuffer();
servletOutputStream.flush();
} finally {
contentStream.close();
}
} else {
Object content = resource.getContent();
if (content != null) {
if (content instanceof byte[]) {
ServletOutputStream servletOutputStream = response.getOutputStream();
servletOutputStream.write((byte[])content);
response.flushBuffer();
servletOutputStream.flush();
} else {
PrintWriter writer = response.getWriter();
writer.write(content.toString());
writer.flush();
}
}
}
resource.discard();
} catch (RegistryException e) {
String msg = "Failed to get resource content. " + e.getMessage();
log.error(msg, e);
response.setStatus(500);
return;
}
}
}