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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 java.net.URI;
import java.util.concurrent.TimeUnit;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.client.api.Response;
import org.openecomp.sdc.common.api.Constants;
import org.openecomp.sdc.common.config.EcompErrorName;
import org.openecomp.sdc.fe.config.Configuration;
import org.openecomp.sdc.fe.config.ConfigurationManager;
import org.openecomp.sdc.fe.config.FeEcompErrorManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.MDC;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
public class FeProxyServlet extends SSLProxyServlet {
private static final long serialVersionUID = 1L;
private static final String URL = "%s://%s:%s%s";
private static Logger log = LoggerFactory.getLogger(FeProxyServlet.class.getName());
private static Cache<String, MdcData> mdcDataCache = CacheBuilder.newBuilder().expireAfterWrite(10, TimeUnit.SECONDS).build();
@Override
public URI rewriteURI(HttpServletRequest request) {
try {
logFeRequest(request);
} catch (Exception e) {
FeEcompErrorManager.getInstance().processEcompError(EcompErrorName.FeHttpLoggingError, "FE Request");
FeEcompErrorManager.getInstance().logFeHttpLoggingError("FE Request");
log.error("Unexpected FE request logging error :", e);
}
String originalUrl = request.getRequestURL().toString();
String redirectedUrl = getModifiedUrl(request);
log.debug("FeProxyServlet Redirecting request from: {} , to: {}", originalUrl, redirectedUrl);
return URI.create(redirectedUrl);
}
@Override
protected void onResponseSuccess(HttpServletRequest request, HttpServletResponse response, Response proxyResponse) {
try {
logFeResponse(request, proxyResponse);
} catch (Exception e) {
FeEcompErrorManager.getInstance().processEcompError(EcompErrorName.FeHttpLoggingError, "FE Response");
FeEcompErrorManager.getInstance().logFeHttpLoggingError("FE Response");
log.error("Unexpected FE response logging error :", e);
}
super.onResponseSuccess(request, response, proxyResponse);
}
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 class MdcData {
private String serviceInstanceID;
private String userId;
private String remoteAddr;
private String localAddr;
private Long transactionStartTime;
public MdcData(String serviceInstanceID, String userId, String remoteAddr, String localAddr, Long transactionStartTime) {
super();
this.serviceInstanceID = serviceInstanceID;
this.userId = userId;
this.remoteAddr = remoteAddr;
this.localAddr = localAddr;
this.transactionStartTime = transactionStartTime;
}
public Long getTransactionStartTime() {
return transactionStartTime;
}
public String getUserId() {
return userId;
}
public String getRemoteAddr() {
return remoteAddr;
}
public String getLocalAddr() {
return localAddr;
}
public String getServiceInstanceID() {
return serviceInstanceID;
}
}
public String getModifiedUrl(HttpServletRequest request) {
Configuration config = getConfiguration(request);
if (config == null) {
log.error("failed to retrive configuration.");
}
String scheme = config.getBeProtocol();
String uri = request.getRequestURI().toString();
StringBuilder url = new StringBuilder();
url.append(scheme).append("://").append(config.getBeHost());
url.append(":");
if (config.getBeProtocol().equals(BE_PROTOCOL.HTTP.getProtocolName())) {
url.append(config.getBeHttpPort());
} else {
url.append(config.getBeSslPort());
}
url.append(uri);
String queryString = request.getQueryString(); // d=789
if (queryString != null) {
url.append("?").append(queryString);
}
String redirectedUrl = url.toString();
String onboardingForwardContext = config.getOnboardingForwardContext();
if (onboardingForwardContext == null || onboardingForwardContext.isEmpty()) {
onboardingForwardContext = "/onboarding-api";
}
redirectedUrl = redirectedUrl.replace("/sdc1/feProxy/dcae-api", "/dcae");
redirectedUrl = redirectedUrl.replace("/sdc1/feProxy/onboarding-api", onboardingForwardContext);
redirectedUrl = redirectedUrl.replace("/sdc1/feProxy", "/sdc2");
return redirectedUrl;
}
private Configuration getConfiguration(HttpServletRequest request) {
Configuration config = ((ConfigurationManager) request.getSession().getServletContext().getAttribute(Constants.CONFIGURATION_MANAGER_ATTR)).getConfiguration();
return config;
}
}
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