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/*
* The MIT License
*
* Copyright 2020 Intuit Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.intuit.karate.http;
import com.intuit.karate.resource.ResourceResolver;
import com.intuit.karate.graal.JsEngine;
import com.intuit.karate.template.KarateTemplateEngine;
import com.intuit.karate.template.TemplateUtils;
import java.io.InputStream;
import java.time.Instant;
import java.util.function.Function;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
*
* @author pthomas3
*/
public class RequestHandler implements ServerHandler {
private static final Logger logger = LoggerFactory.getLogger(RequestHandler.class);
private final SessionStore sessionStore;
private final KarateTemplateEngine engine;
private final String homePagePath;
private final ServerConfig config;
private final Function contextFactory;
private final ResourceResolver resourceResolver;
private final String stripHostContextPath;
public RequestHandler(ServerConfig config) {
this.config = config;
contextFactory = config.getContextFactory();
resourceResolver = config.getResourceResolver();
engine = TemplateUtils.forServer(config);
homePagePath = config.getHomePagePath();
sessionStore = config.getSessionStore();
stripHostContextPath = config.isStripContextPathFromRequest() ? config.getHostContextPath() : null;
}
@Override
public Response handle(Request request) {
long startTime = System.currentTimeMillis();
if (stripHostContextPath != null) {
String path = request.getPath();
if (path.startsWith(stripHostContextPath)) {
request.setPath(path.substring(stripHostContextPath.length()));
}
}
if (request.getPath().isEmpty()) {
if (logger.isDebugEnabled()) {
logger.debug("redirecting to home page: {}", request);
}
return response().locationHeader(redirectPath()).status(302);
}
ServerContext context = contextFactory.apply(request);
context.prepare();
if (request.isForStaticResource()) {
if (logger.isDebugEnabled()) {
logger.debug("{}", request);
}
return response().buildStatic(request);
}
Session session = context.getSession(); // can be pre-resolved by context-factory
boolean newSession = false;
if (session == null && !context.isStateless()) {
String sessionId = context.getSessionCookieValue();
if (sessionId != null) {
session = sessionStore.get(sessionId);
if (session != null && isExpired(session)) {
logger.debug("session expired: {}", session);
sessionStore.delete(sessionId);
session = null;
}
}
if (session == null) {
if (config.isAutoCreateSession() || homePagePath.equals(request.getPath())) {
session = createSession();
newSession = true;
logger.debug("creating new session for '{}': {}", request.getPath(), session);
} else {
logger.warn("session not found: {}", request);
ResponseBuilder rb = response().deleteSessionCookie(sessionId);
if (request.isAjax()) {
rb.ajaxRedirect(redirectPath());
} else {
rb.locationHeader(redirectPath());
}
return rb.status(302);
}
}
}
RequestCycle rc = RequestCycle.init(JsEngine.global());
rc.init(context, session);
try {
if (context.isApi()) {
InputStream is = resourceResolver.resolve(request.getResourcePath()).getStream();
ResponseBuilder rb = response(rc, session, newSession);
if (context.isLockNeeded()) {
synchronized (this) {
return apiResponse(is, rb, rc);
}
} else {
return apiResponse(is, rb, rc);
}
} else {
String html = htmlResponse(request, rc);
return response(rc, session, newSession).html(html).build(rc);
}
} catch (Exception e) {
logger.error("handle failed: {}", e.getMessage());
return response().status(500);
} finally {
rc.close();
long elapsedTime = System.currentTimeMillis() - startTime;
if (logger.isDebugEnabled()) {
logger.debug("{} {} ms", request, elapsedTime);
}
}
}
private String redirectPath() {
String contextPath = config.getHostContextPath();
return contextPath == null ? "/" + homePagePath : contextPath + homePagePath;
}
private String htmlResponse(Request request, RequestCycle rc) {
try {
return engine.process(request.getPath());
} catch (Exception e) {
String switchTemplate = rc.getAndClearSwitchTemplate();
if (switchTemplate != null) {
logger.debug("redirect requested to: {}", switchTemplate);
return engine.process(switchTemplate);
} else {
throw e;
}
}
}
private Response apiResponse(InputStream is, ResponseBuilder rb, RequestCycle rc) {
JsEngine.evalGlobal(is);
return rb.build(rc);
}
private boolean isExpired(Session session) {
long now = Instant.now().getEpochSecond();
long expires = session.getUpdated() + config.getSessionExpirySeconds();
if (now > expires) {
return true;
}
session.setUpdated(now);
session.setExpires(expires);
return false;
}
private Session createSession() {
long now = Instant.now().getEpochSecond();
long expires = now + config.getSessionExpirySeconds();
return sessionStore.create(now, expires);
}
private ResponseBuilder response() {
return new ResponseBuilder(config, null);
}
private ResponseBuilder response(RequestCycle rc, Session session, boolean newSession) {
return new ResponseBuilder(config, rc).session(session, newSession);
}
}
