/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.myfaces.tobago.internal.webapp;
import org.apache.commons.lang.StringUtils;
import org.apache.myfaces.tobago.internal.util.FastStringWriter;
import org.apache.myfaces.tobago.internal.util.JavascriptWriterUtils;
import org.apache.myfaces.tobago.util.FacesVersion;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.faces.component.UIComponent;
import javax.faces.context.ResponseWriter;
import java.io.IOException;
import java.io.Writer;
public class JsonResponseWriter extends HtmlResponseWriter {
private static final Logger LOG = LoggerFactory.getLogger(JsonResponseWriter.class);
private Writer javascriptWriter;
private boolean javascriptBlock;
private JavascriptWriterUtils encodeInJavascriptBlock;
private JavascriptWriterUtils encodeOutsideJavascriptBlock;
public JsonResponseWriter(Writer writer, String contentType, String characterEncoding) {
super(writer, contentType, characterEncoding);
this.javascriptWriter = new FastStringWriter();
this.encodeOutsideJavascriptBlock = new JavascriptWriterUtils(writer, characterEncoding);
this.encodeInJavascriptBlock = new JavascriptWriterUtils(javascriptWriter, characterEncoding);
}
@Override
public void endJavascript() throws IOException {
javascriptBlock = false;
}
@Override
public void startJavascript() throws IOException {
javascriptBlock = true;
}
@Override
public void write(String string) throws IOException {
closeOpenTag();
if (javascriptBlock) {
encodeInJavascriptBlock.writeText(string);
} else {
encodeOutsideJavascriptBlock.writeText(string);
}
}
@Override
public void write(char[] chars) throws IOException {
// XXX remove me later:
// this is a temporary workaround, should be removed after fixing the bug in Mojarra.
// http://java.net/jira/browse/JAVASERVERFACES-2411
// https://issues.apache.org/jira/browse/TOBAGO-1124
if (FacesVersion.isMojarra() && FacesVersion.supports20()) {
StackTraceElement[] stackTraceElements = Thread.currentThread().getStackTrace();
if (stackTraceElements[2].getClassName().equals("com.sun.faces.renderkit.ServerSideStateHelper")) {
super.write(StringUtils.replace(new String(chars), "\"", "\\\""));
return;
}
}
super.write(chars);
}
@Override
public void writeJavascript(String script) throws IOException {
closeOpenTag();
encodeInJavascriptBlock.writeText(script);
}
public String getJavascript() {
return javascriptWriter.toString();
}
@Override
protected void startElementInternal(Writer writer, String name, UIComponent currentComponent)
throws IOException {
setComponent(currentComponent);
if (isStartStillOpen()) {
writer.write(">");
}
writer.write("<");
writer.write(name);
setStartStillOpen(true);
}
@Override
protected void endElementInternal(Writer writer, String name) throws IOException {
if (EMPTY_TAG.contains(name)) {
writer.write(">");
} else {
if (isStartStillOpen()) {
writer.write(">");
}
writer.write("</");
writer.write(name);
writer.write(">");
}
setStartStillOpen(false);
}
@Override
protected void closeOpenTag() throws IOException {
if (isStartStillOpen()) {
getWriter().write(">");
setStartStillOpen(false);
}
}
@Override
protected void writeAttributeInternal(Writer writer, String name, String value, boolean escape)
throws IOException {
if (!isStartStillOpen()) {
String trace = getCallingClassStackTraceElementString();
String error = "Cannot write attribute when start-tag not open. "
+ "name = '" + name + "' "
+ "value = '" + value + "' "
+ trace.substring(trace.indexOf('('));
LOG.error(error);
throw new IllegalStateException(error);
}
if (value != null) {
writer.write(' ');
writer.write(name);
writer.write("=\\\"");
if (escape) {
getHelper().writeAttributeValue(value);
} else {
writer.write(value);
}
writer.write("\\\"");
}
}
public void writeText(final Object text, final String property)
throws IOException {
closeOpenTag();
String value = findValue(text, property);
getHelper().writeText(value);
}
/* TODO: may also encode the backslash \, but will not be used currently
public void writeText(final char[] text, final int offset, final int length)
throws IOException {
closeOpenTag();
getHelper().writeText(text, offset, length);
}
*/
public ResponseWriter cloneWithWriter(final Writer originalWriter) {
return new JsonResponseWriter(
originalWriter, getContentType(), getCharacterEncoding());
}
@Override
public void startDocument() throws IOException {
}
@Override
public void endDocument() throws IOException {
}
}