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/*
* The MIT License
*
* Copyright 2022 Karate Labs 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.template;
import com.intuit.karate.StringUtils;
import com.intuit.karate.graal.JsEngine;
import java.io.IOException;
import java.io.Writer;
import java.util.Map;
import java.util.function.Supplier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.thymeleaf.IEngineConfiguration;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.TemplateSpec;
import org.thymeleaf.context.IContext;
import org.thymeleaf.context.IEngineContext;
import org.thymeleaf.context.StandardEngineContextFactory;
import org.thymeleaf.dialect.IDialect;
import org.thymeleaf.engine.TemplateData;
import org.thymeleaf.engine.TemplateManager;
import org.thymeleaf.exceptions.TemplateOutputException;
import org.thymeleaf.exceptions.TemplateProcessingException;
import org.thymeleaf.templatemode.TemplateMode;
import org.thymeleaf.templateresolver.ITemplateResolver;
import org.thymeleaf.util.FastStringWriter;
/**
*
* @author pthomas3
*/
public class KarateTemplateEngine {
private static final Logger logger = LoggerFactory.getLogger(KarateTemplateEngine.class);
private final StandardEngineContextFactory standardFactory;
private final TemplateEngine wrapped;
public KarateTemplateEngine(Supplier jsEngine, IDialect... dialects) {
standardFactory = new StandardEngineContextFactory();
wrapped = new TemplateEngine();
wrapped.setEngineContextFactory((IEngineConfiguration ec, TemplateData data, Map attrs, IContext context) -> {
IEngineContext engineContext = standardFactory.createEngineContext(ec, data, attrs, context);
return KarateEngineContext.initThreadLocal(engineContext, jsEngine.get());
});
// the next line is a set which clears and replaces all existing / default
wrapped.setDialect(new KarateStandardDialect());
for (IDialect dialect : dialects) {
wrapped.addDialect(dialect);
}
}
public void addTemplateResolver(ITemplateResolver templateResolver) {
wrapped.addTemplateResolver(templateResolver);
}
public void setTemplateResolver(ITemplateResolver templateResolver) {
wrapped.setTemplateResolver(templateResolver);
}
public String process(String template) {
return process(template, TemplateContext.LOCALE_US);
}
public String process(String template, IContext context) {
TemplateSpec templateSpec = new TemplateSpec(template, TemplateMode.HTML);
Writer stringWriter = new FastStringWriter(100);
process(templateSpec, context, stringWriter);
return stringWriter.toString();
}
public void process(TemplateSpec templateSpec, IContext context, Writer writer) {
try {
TemplateManager templateManager = wrapped.getConfiguration().getTemplateManager();
templateManager.parseAndProcess(templateSpec, context, writer);
try {
writer.flush();
} catch (IOException e) {
throw new TemplateOutputException("error flushing output writer", templateSpec.getTemplate(), -1, -1, e);
}
} catch (Exception e) {
KarateEngineContext kec = KarateEngineContext.get();
if (kec != null && !kec.isRedirect()) { // don't log redirects
// make thymeleaf errors easier to troubleshoot from the logs
while (e.getCause() instanceof Exception) {
e = (Exception) e.getCause();
if (e instanceof TemplateProcessingException) {
logger.error("{}", e.getMessage()); // will print line and col numbers
if (e.getCause() != null) { // typically the js error
String message = e.getCause().getMessage();
logger.error("{}", message);
}
break;
}
}
}
if (logger.isTraceEnabled()) {
logger.trace("{}", StringUtils.throwableToString(e));
}
throw new RuntimeException(e);
}
}
}
