org.grails.encoder.impl.BasicJSONEncoder Maven / Gradle / Ivy
/*
* Copyright 2013-2022 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
*
* https://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 org.grails.encoder.impl;
import org.codehaus.groovy.runtime.StringGroovyMethods;
import org.springframework.util.ClassUtils;
import org.grails.encoder.AbstractCharReplacementEncoder;
import org.grails.encoder.CodecIdentifier;
import org.grails.encoder.DefaultCodecIdentifier;
/**
* Escapes characters in JSON output
*
* @author Lari Hotari
* @since 2.3.4
*/
public class BasicJSONEncoder extends AbstractCharReplacementEncoder {
public static final CodecIdentifier JSON_CODEC_IDENTIFIER = new DefaultCodecIdentifier(
"JSON", "Json") {
public boolean isEquivalent(CodecIdentifier other) {
return super.isEquivalent(other) || JavaScriptEncoder.JAVASCRIPT_CODEC_IDENTIFIER.getCodecName().equals(other.getCodecName());
}
};
public BasicJSONEncoder() {
super(JSON_CODEC_IDENTIFIER);
}
/* (non-Javadoc)
* @see AbstractCharReplacementEncoder#escapeCharacter(char, char)
*/
@Override
protected String escapeCharacter(char ch, char previousChar) {
switch (ch) {
case '"':
return "\\\"";
case '\\':
return "\\\\";
case '\t':
return "\\t";
case '\n':
return "\\n";
case '\r':
return "\\r";
case '\f':
return "\\f";
case '\b':
return "\\b";
case '\u000B': // vertical tab: http://bclary.com/2004/11/07/#a-7.8.4
return "\\u000B";
case '\u2028':
return "\\u2028"; // Line separator
case '\u2029':
return "\\u2029"; // Paragraph separator
case '/':
// preserve special handling that exists in JSONObject.quote to improve security if JSON is embedded in HTML document
// prevents outputting "