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/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.openecomp.sdc.fe.servlets;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import org.eclipse.jetty.client.api.Response;
import org.openecomp.sdc.common.api.Constants;
import org.openecomp.sdc.fe.config.Configuration;
import org.openecomp.sdc.fe.config.ConfigurationManager;
import org.openecomp.sdc.fe.config.FeEcompErrorManager;
import org.openecomp.sdc.fe.config.PluginsConfiguration;
import org.openecomp.sdc.fe.config.PluginsConfiguration.Plugin;
import org.openecomp.sdc.fe.impl.MdcData;
import org.openecomp.sdc.fe.utils.BeProtocol;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.MDC;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.concurrent.TimeUnit;
public class FeProxyServlet extends SSLProxyServlet {
private static final long serialVersionUID = 1L;
private static final String URL = "%s://%s%s%s";
private static final String ONBOARDING_CONTEXT = "/onboarding-api";
private static final String DCAED_CONTEXT = "/dcae-api";
private static final String WORKFLOW_CONTEXT = "/wf";
private static final String SDC1_FE_PROXY = "/sdc1/feProxy";
private static final String PLUGIN_ID_WORKFLOW = "WORKFLOW";
private static final Logger log = LoggerFactory.getLogger(FeProxyServlet.class.getName());
private static Cache<String, MdcData> mdcDataCache = CacheBuilder.newBuilder().expireAfterWrite(10, TimeUnit.SECONDS).build();
@Override
protected String rewriteTarget(HttpServletRequest request) {
String originalUrl="";
String redirectedUrl = "";
try {
logFeRequest(request);
originalUrl = request.getRequestURL().toString();
redirectedUrl = getModifiedUrl(request);
} catch(MalformedURLException mue){
FeEcompErrorManager.getInstance().logFeHttpLoggingError("FE Request");
log.error("Unexpected FE request processing error :", mue);
}
catch (Exception e) {
FeEcompErrorManager.getInstance().logFeHttpLoggingError("FE Request");
log.error("Unexpected FE request logging error :", e);
}
log.debug("FeProxyServlet Redirecting request from: {} , to: {}", originalUrl, redirectedUrl);
return redirectedUrl;
}
@Override
protected void onProxyResponseSuccess(HttpServletRequest request, HttpServletResponse proxyResponse, Response response) {
try {
logFeResponse(request, response);
} catch (Exception e) {
FeEcompErrorManager.getInstance().logFeHttpLoggingError("FE Response");
log.error("Unexpected FE response logging error :", e);
}
super.onProxyResponseSuccess(request, proxyResponse, response);
}
private void logFeRequest(HttpServletRequest httpRequest) {
MDC.clear();
Long transactionStartTime = System.currentTimeMillis();
// UUID - In FE, we are supposed to get the below header from UI.
// We do not generate it if it's missing - BE does.
String uuid = httpRequest.getHeader(Constants.X_ECOMP_REQUEST_ID_HEADER);
String serviceInstanceID = httpRequest.getHeader(Constants.X_ECOMP_SERVICE_ID_HEADER);
if (uuid != null && uuid.length() > 0) {
// UserId for logging
String userId = httpRequest.getHeader(Constants.USER_ID_HEADER);
String remoteAddr = httpRequest.getRemoteAddr();
String localAddr = httpRequest.getLocalAddr();
mdcDataCache.put(uuid, new MdcData(serviceInstanceID, userId, remoteAddr, localAddr, transactionStartTime));
updateMdc(uuid, serviceInstanceID, userId, remoteAddr, localAddr, null);
}
inHttpRequest(httpRequest);
}
private void logFeResponse(HttpServletRequest request, Response proxyResponse) {
String uuid = request.getHeader(Constants.X_ECOMP_REQUEST_ID_HEADER);
String transactionRoundTime = null;
if (uuid != null) {
MdcData mdcData = mdcDataCache.getIfPresent(uuid);
if (mdcData != null) {
Long transactionStartTime = mdcData.getTransactionStartTime();
if (transactionStartTime != null) {// should'n ever be null, but
// just to be defensive
transactionRoundTime = Long.toString(System.currentTimeMillis() - transactionStartTime);
}
updateMdc(uuid, mdcData.getServiceInstanceID(), mdcData.getUserId(), mdcData.getRemoteAddr(), mdcData.getLocalAddr(), transactionRoundTime);
}
}
outHttpResponse(proxyResponse);
MDC.clear();
}
// Extracted for purpose of clear method name, for logback %M parameter
private void inHttpRequest(HttpServletRequest httpRequest) {
log.info("{} {} {}", httpRequest.getMethod(), httpRequest.getRequestURI(), httpRequest.getProtocol());
}
// Extracted for purpose of clear method name, for logback %M parameter
private void outHttpResponse(Response proxyResponse) {
log.info("SC=\"{}\"", proxyResponse.getStatus());
}
private void updateMdc(String uuid, String serviceInstanceID, String userId, String remoteAddr, String localAddr, String transactionStartTime) {
MDC.put("uuid", uuid);
MDC.put("serviceInstanceID", serviceInstanceID);
MDC.put("userId", userId);
MDC.put("remoteAddr", remoteAddr);
MDC.put("localAddr", localAddr);
MDC.put("timer", transactionStartTime);
}
private String getModifiedUrl(HttpServletRequest request) throws MalformedURLException {
Configuration config = getConfiguration(request);
if (config == null) {
log.error("failed to retrive configuration.");
throw new RuntimeException("failed to read FE configuration");
}
String uri = request.getRequestURI();
String protocol;
String host;
String port;
if (uri.contains(ONBOARDING_CONTEXT)){
uri = uri.replace(SDC1_FE_PROXY+ONBOARDING_CONTEXT,ONBOARDING_CONTEXT);
protocol = config.getOnboarding().getProtocolBe();
host = config.getOnboarding().getHostBe();
port = config.getOnboarding().getPortBe().toString();
}else if(uri.contains(DCAED_CONTEXT)){
uri = uri.replace(SDC1_FE_PROXY+DCAED_CONTEXT,DCAED_CONTEXT);
protocol = config.getBeProtocol();
host = config.getBeHost();
if (config.getBeProtocol().equals(BeProtocol.HTTP.getProtocolName())) {
port = config.getBeHttpPort().toString();
} else {
port = config.getBeSslPort().toString();
}
}
else if (uri.contains(WORKFLOW_CONTEXT)){
uri = uri.replace(SDC1_FE_PROXY +WORKFLOW_CONTEXT,WORKFLOW_CONTEXT);
String workflowPluginURL = getPluginConfiguration(request).getPluginsList()
.stream()
.filter(plugin -> plugin.getPluginId().equalsIgnoreCase(PLUGIN_ID_WORKFLOW))
.map(Plugin::getPluginSourceUrl)
.findFirst().orElse(null);
java.net.URL workflowURL = new URL(workflowPluginURL);
protocol = workflowURL.getProtocol();
host = workflowURL.getHost();
port = String.valueOf(workflowURL.getPort());
}
else{
uri = uri.replace(SDC1_FE_PROXY,"/sdc2");
protocol = config.getBeProtocol();
host = config.getBeHost();
if (config.getBeProtocol().equals(BeProtocol.HTTP.getProtocolName())) {
port = config.getBeHttpPort().toString();
} else {
port = config.getBeSslPort().toString();
}
}
String authority = getAuthority(host, port);
String queryString = getQueryString(request);
return String.format(URL,protocol,authority,uri,queryString);
}
private PluginsConfiguration getPluginConfiguration(HttpServletRequest request) {
return ((ConfigurationManager) request.getSession().getServletContext().getAttribute(Constants.CONFIGURATION_MANAGER_ATTR)).getPluginsConfiguration();
}
private Configuration getConfiguration(HttpServletRequest request) {
return ((ConfigurationManager) request.getSession().getServletContext().getAttribute(Constants.CONFIGURATION_MANAGER_ATTR)).getConfiguration();
}
private String getAuthority(String host, String port) {
String authority;
if (port==null){
authority=host;
}
else{
authority=host+":"+port;
}
return authority;
}
private String getQueryString(HttpServletRequest request) {
String queryString = request.getQueryString();
if (queryString != null) {
queryString="?"+queryString;
}
else{
queryString="";
}
return queryString;
}
}
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