325 lines
11 KiB
Java
325 lines
11 KiB
Java
/**
|
|
*
|
|
*/
|
|
package org.gcube.datatransfer.resolver.gis.geonetwork;
|
|
|
|
import java.io.IOException;
|
|
import java.io.InputStream;
|
|
import java.io.OutputStream;
|
|
import java.io.StringReader;
|
|
import java.util.HashMap;
|
|
import java.util.Map;
|
|
import java.util.Timer;
|
|
import java.util.TimerTask;
|
|
|
|
import javax.servlet.ServletException;
|
|
import javax.servlet.http.HttpServlet;
|
|
import javax.servlet.http.HttpServletRequest;
|
|
import javax.servlet.http.HttpServletResponse;
|
|
|
|
import org.apache.commons.io.IOUtils;
|
|
import org.gcube.datatransfer.resolver.gis.GeoRuntimeReader;
|
|
import org.gcube.datatransfer.resolver.gis.GeoRuntimeReader.GEO_SERVICE;
|
|
import org.gcube.datatransfer.resolver.gis.GeonetowrkAccessParameter;
|
|
import org.gcube.datatransfer.resolver.gis.GeonetworkServiceInterface;
|
|
import org.gcube.datatransfer.resolver.gis.MetadataConverter;
|
|
import org.gcube.datatransfer.resolver.gis.entity.ServerParameters;
|
|
import org.gcube.datatransfer.resolver.gis.exception.GeonetworkInstanceException;
|
|
import org.gcube.datatransfer.resolver.gis.exception.IllegalArgumentException;
|
|
import org.slf4j.Logger;
|
|
import org.slf4j.LoggerFactory;
|
|
|
|
|
|
/**
|
|
* The Class GeonetworkResolver.
|
|
*
|
|
* @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
|
|
* Apr 4, 2016
|
|
*
|
|
* This class authenticate all query on Geonetwork
|
|
*/
|
|
public class GeonetworkResolver extends HttpServlet{
|
|
|
|
/**
|
|
*
|
|
*/
|
|
public static final String APPLICATION_XML = "application/xml";
|
|
/**
|
|
*
|
|
*/
|
|
private static final long serialVersionUID = -61097584153314181L;
|
|
public static final String SCOPE = "scope";
|
|
public static final String CSW_SERVER = "srv/en/csw";
|
|
|
|
/** The logger. */
|
|
private static final Logger logger = LoggerFactory.getLogger(GeonetworkResolver.class);
|
|
|
|
protected Map<String, ServerParameters> cacheGNServerParams; //A cache: scope - geonetwork parameters
|
|
|
|
private Timer timer;
|
|
|
|
//THIRTY MINUTES
|
|
public static final long CACHE_RESET_TIME = 30*60*1000;
|
|
|
|
//TEN MINUTES
|
|
public static final long CACHE_RESET_DELAY = 10*1000;
|
|
|
|
/* (non-Javadoc)
|
|
* @see javax.servlet.GenericServlet#init()
|
|
*/
|
|
@Override
|
|
public void init() throws ServletException {
|
|
super.init();
|
|
timer = new Timer(true);
|
|
timer.schedule(new TimerTask() {
|
|
@Override
|
|
public void run() {
|
|
logger.info("Resetting Geonetwork configuratios cache...");
|
|
reseCacheServerParameters();
|
|
}
|
|
}, CACHE_RESET_DELAY, CACHE_RESET_TIME);
|
|
}
|
|
|
|
/* (non-Javadoc)
|
|
* @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
|
|
*/
|
|
@Override
|
|
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
|
|
String scope = req.getParameter(SCOPE);
|
|
|
|
if (scope == null || scope.equals("")) {
|
|
logger.debug("Scope not found");
|
|
sendError(resp, HttpServletResponse.SC_BAD_REQUEST, SCOPE+" not found or empty");
|
|
return;
|
|
}
|
|
|
|
logger.info("SCOPE: " + scope +", Query String: " + req.getQueryString());
|
|
try {
|
|
|
|
ServerParameters geonetworkParams = getGeonetworkCachedServerParameters(scope);
|
|
HTTPCallsUtils httpUtils = new HTTPCallsUtils();
|
|
boolean authorized = GNAuthentication.login(httpUtils, geonetworkParams.getUrl(), geonetworkParams.getUser(), geonetworkParams.getPassword());
|
|
logger.trace("Authorized on "+geonetworkParams +" ? "+authorized);
|
|
String newQueryString = purgeScopeFromQueryString(scope, req.getQueryString());
|
|
logger.info("Purged query string: "+newQueryString);
|
|
String gnGetlURL = newQueryString==null || newQueryString.isEmpty()? geonetworkParams.getUrl()+"/"+CSW_SERVER : geonetworkParams.getUrl()+"/"+CSW_SERVER+"?"+newQueryString;
|
|
logger.info("Sending get request to URL: "+gnGetlURL);
|
|
String response = httpUtils.get(gnGetlURL);
|
|
logger.info("Response return Content-Type: "+httpUtils.getLastContentType());
|
|
resp.setContentType(httpUtils.getLastContentType());
|
|
InputStream in = IOUtils.toInputStream(response);
|
|
OutputStream out = resp.getOutputStream();
|
|
try{
|
|
int bytes = IOUtils.copy(in, out);
|
|
if(bytes==0)
|
|
logger.warn("ResponseBody is empty, returning empty resp");
|
|
}catch(Exception e){
|
|
logger.error("Error on copy response:", e);
|
|
}finally{
|
|
IOUtils.closeQuietly(in);
|
|
}
|
|
|
|
} catch (IllegalArgumentException e){
|
|
logger.error("IllegalArgumentException:", e);
|
|
sendError(resp, HttpServletResponse.SC_BAD_REQUEST, "Illegal argument to carry out the request!");
|
|
return;
|
|
|
|
} catch (Exception e) {
|
|
logger.error("Exception:", e);
|
|
String error = "Sorry, an error occurred on resolving geonetwork request with scope "+scope+". Please, contact support!";
|
|
sendError(resp, HttpServletResponse.SC_INTERNAL_SERVER_ERROR, error);
|
|
return;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Purge scope from query string.
|
|
*
|
|
* @param scope the scope
|
|
* @param queryString the query string
|
|
* @return the string
|
|
*/
|
|
private static String purgeScopeFromQueryString(String scope, String queryString){
|
|
// SCOPE is: /gcube/devsec/devVRE
|
|
// [INFO ] 2016-04-05 15:01:42,808 org.gcube.datatransfer.resolver.gis.geonetwork.GeonetworkResolver -
|
|
// Query String is: scope=/gcube/devsec/devVRE&version=2.0.2&request=GetCapabilities&service=CSW
|
|
int start = queryString.indexOf(SCOPE+"=");
|
|
|
|
if(start>=0){
|
|
int end = queryString.indexOf("&", start);
|
|
|
|
if(end==-1 && queryString.length()==(SCOPE+"="+scope).length()){ //SCOPE IS THE UNIQUE PARAMETER INTO QUETY STRING
|
|
logger.debug("Scope is the unique parameter, returning empty query string");
|
|
return "";
|
|
}else if(end<queryString.length())
|
|
return queryString.substring(end+1, queryString.length());
|
|
}
|
|
|
|
return queryString;
|
|
}
|
|
|
|
/* (non-Javadoc)
|
|
* @see javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
|
|
*/
|
|
@Override
|
|
protected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {
|
|
|
|
String scope = req.getParameter(SCOPE);
|
|
|
|
if (scope == null || scope.equals("")) {
|
|
logger.debug("Scope not found");
|
|
sendError(resp, HttpServletResponse.SC_BAD_REQUEST, SCOPE+" not found or empty");
|
|
return;
|
|
}
|
|
|
|
logger.info("SCOPE is: " + scope);
|
|
|
|
try {
|
|
|
|
ServerParameters geonetworkParams = getGeonetworkCachedServerParameters(scope);
|
|
HTTPCallsUtils httpUtils = new HTTPCallsUtils();
|
|
boolean authorized = GNAuthentication.login(httpUtils, geonetworkParams.getUrl(), geonetworkParams.getUser(), geonetworkParams.getPassword());
|
|
logger.trace("Authorized on "+geonetworkParams +" ? "+authorized);
|
|
String gnCSWlURL = geonetworkParams.getUrl()+"/"+CSW_SERVER;
|
|
logger.info("Sending CSW request to URL: "+gnCSWlURL);
|
|
String response = httpUtils.post(gnCSWlURL, req.getInputStream(), req.getContentType());
|
|
logger.info("Response return Content-Type: "+httpUtils.getLastContentType());
|
|
resp.setContentType(httpUtils.getLastContentType());
|
|
InputStream in = IOUtils.toInputStream(response);
|
|
OutputStream out = resp.getOutputStream();
|
|
try{
|
|
int bytes = IOUtils.copy(IOUtils.toInputStream(response), out);
|
|
if(bytes==0)
|
|
logger.warn("ResponseBody is empty, returning empty resp");
|
|
}catch(Exception e){
|
|
logger.error("Error on copy response:", e);
|
|
}finally{
|
|
IOUtils.closeQuietly(in);
|
|
}
|
|
|
|
} catch (IllegalArgumentException e){
|
|
logger.error("IllegalArgumentException:", e);
|
|
sendError(resp, HttpServletResponse.SC_BAD_REQUEST, "Illegal argument to carry out the request!");
|
|
return;
|
|
|
|
} catch (Exception e) {
|
|
logger.error("Exception:", e);
|
|
String error = "Sorry, an error occurred on resolving geonetwork request with scope "+scope+". Please, contact support!";
|
|
sendError(resp, HttpServletResponse.SC_INTERNAL_SERVER_ERROR, error);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Gets the geonetwork cached server parameters.
|
|
*
|
|
* @param scope the scope
|
|
* @return the geonetwork cached server parameters
|
|
* @throws Exception the exception
|
|
*/
|
|
protected ServerParameters getGeonetworkCachedServerParameters(String scope) throws Exception{
|
|
|
|
if(cacheGNServerParams==null)
|
|
reseCacheServerParameters();
|
|
|
|
logger.info("Tentative for recovering geonetwork server parameters from cache with scope: "+scope);
|
|
ServerParameters serverParam = cacheGNServerParams.get(scope);
|
|
|
|
if(serverParam==null){
|
|
logger.info("Cache having null Geonetwork server parameters, reading from IS..");
|
|
GeoRuntimeReader reader = new GeoRuntimeReader();
|
|
try {
|
|
serverParam = reader.retrieveGisParameters(scope, GEO_SERVICE.GEONETWORK);
|
|
cacheGNServerParams.put(scope, serverParam);
|
|
logger.info("Updated Cache for Geonetwork server parameters! Scope "+scope+" linking "+serverParam);
|
|
} catch (Exception e) {
|
|
logger.error("An error occurred on reading application profile to "+GEO_SERVICE.GEONETWORK, e);
|
|
throw new Exception("Sorry, An error occurred on reading configuration to "+GEO_SERVICE.GEONETWORK);
|
|
}
|
|
}else
|
|
logger.info("Cache gis server param is not null using it");
|
|
|
|
logger.info("returning geonetworkParams "+serverParam);
|
|
|
|
return serverParam;
|
|
}
|
|
|
|
/**
|
|
* Rese cache server parameters.
|
|
*/
|
|
private void reseCacheServerParameters(){
|
|
cacheGNServerParams = new HashMap<String, ServerParameters>();
|
|
logger.info("Cache Geonetwork server params reset!");
|
|
}
|
|
|
|
/**
|
|
* Gets the layer wms request.
|
|
*
|
|
* @param scope the scope
|
|
* @param gisUUID the gis uuid
|
|
* @param geonetworkParams the geonetwork params
|
|
* @return the layer wms request
|
|
* @throws Exception the exception
|
|
*/
|
|
protected String getLayerWmsRequest(String scope, String gisUUID, ServerParameters geonetworkParams) throws Exception{
|
|
|
|
try {
|
|
GeonetworkServiceInterface gntwAccess = new GeonetowrkAccessParameter(scope, geonetworkParams);
|
|
return MetadataConverter.getWMSOnLineResource(gntwAccess.getGeonetworkInstance(true), gisUUID);
|
|
}catch (GeonetworkInstanceException e){
|
|
logger.error("An error occurred when instancing geonetowrk gis layer with UUID "+gisUUID, e);
|
|
throw new IllegalArgumentException("Sorry, An error occurred when instancing geonetwork with UUID: "+gisUUID);
|
|
} catch (Exception e) {
|
|
logger.error("An error occurred when retrieving gis layer with UUID "+gisUUID, e);
|
|
throw new IllegalArgumentException("Sorry, An error occurred when retrieving gis layer with UUID "+gisUUID);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Send error.
|
|
*
|
|
* @param response the response
|
|
* @param status the status
|
|
* @param message the message
|
|
* @throws IOException Signals that an I/O exception has occurred.
|
|
*/
|
|
protected void sendError(HttpServletResponse response, int status, String message) throws IOException
|
|
{
|
|
// response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
|
|
response.setStatus(status);
|
|
logger.info("error message: "+message);
|
|
logger.info("writing response...");
|
|
StringReader sr = new StringReader(message);
|
|
IOUtils.copy(sr, response.getOutputStream());
|
|
|
|
// response.getWriter().write(resultMessage.toString());
|
|
logger.info("response writed");
|
|
response.flushBuffer();
|
|
}
|
|
|
|
/**
|
|
* Url redirect.
|
|
*
|
|
* @param req the req
|
|
* @param response the response
|
|
* @param redirectTo the redirect to
|
|
* @throws IOException Signals that an I/O exception has occurred.
|
|
*/
|
|
protected void urlRedirect(HttpServletRequest req, HttpServletResponse response, String redirectTo) throws IOException {
|
|
response.sendRedirect(response.encodeRedirectURL(redirectTo));
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* The main method.
|
|
*
|
|
* @param args the arguments
|
|
*/
|
|
public static void main(String[] args) {
|
|
|
|
System.out.println(purgeScopeFromQueryString("/gcube/devsec/devVRE", "scope=/gcube/devsec/devVRE&version=2.0.2&request=GetCapabilities&service=CSW"));
|
|
}
|
|
}
|