/**
* Copyright (C) 2012-2017 the original author or authors.
*
* 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.
*/
package ninja.template;
import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import org.apache.commons.io.IOUtils;
import freemarker.cache.TemplateLoader;
/**
* This class html-escapes variables like ${...} in all templates (ftl.html). If
* you don't want to have something escaped you can use at your own risk:
* <p>
*
* <code>
* <#noescape>${...}</#noescape>
* </code>
*
* (inside your template).
* <p>
* See also http://freemarker.org/docs/ref_directive_escape.html
*
*/
public class TemplateEngineFreemarkerEscapedLoader implements TemplateLoader {
public static final String ESCAPE_PREFIX = "<#ftl strip_whitespace=true><#escape x as x?html>";
public static final String ESCAPE_SUFFIX = "</#escape>";
private final TemplateLoader delegate;
public TemplateEngineFreemarkerEscapedLoader(TemplateLoader delegate) {
this.delegate = delegate;
}
@Override
public Object findTemplateSource(String name) throws IOException {
return delegate.findTemplateSource(name);
}
@Override
public long getLastModified(Object templateSource) {
return delegate.getLastModified(templateSource);
}
@Override
public Reader getReader(Object templateSource, String encoding)
throws IOException {
Reader reader = delegate.getReader(templateSource, encoding);
try {
String templateText = IOUtils.toString(reader);
return new StringReader(ESCAPE_PREFIX + templateText
+ ESCAPE_SUFFIX);
} finally {
IOUtils.closeQuietly(reader);
}
}
@Override
public void closeTemplateSource(Object templateSource) throws IOException {
delegate.closeTemplateSource(templateSource);
}
}