CDATA support
This commit is contained in:
Mirko Caserta
Trustin Lee
parent
086dbd1ba1
commit
ee8571824b
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@ -82,6 +82,7 @@ public class XmlFrameDecoder extends ByteToMessageDecoder {
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protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
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boolean openingBracketFound = false;
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boolean atLeastOneXmlElementFound = false;
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boolean inCDATASection = false;
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long openBracketsCount = 0;
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int length = 0;
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int leadingWhiteSpaceCount = 0;
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@ -104,7 +105,7 @@ public class XmlFrameDecoder extends ByteToMessageDecoder {
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fail(ctx);
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in.skipBytes(in.readableBytes());
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return;
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} else if (readByte == '<') {
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} else if (!inCDATASection && readByte == '<') {
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openingBracketFound = true;
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if (i < bufferLength - 1) {
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@ -117,17 +118,21 @@ public class XmlFrameDecoder extends ByteToMessageDecoder {
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// char after < is a valid xml element start char,
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// incrementing openBracketsCount
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openBracketsCount++;
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} else if (peekAheadByte == '!' && i < bufferLength - 3
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&& in.getByte(i + 2) == '-'
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&& in.getByte(i + 3) == '-') {
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// <!-- comment --> start found
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openBracketsCount++;
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} else if (peekAheadByte == '!') {
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if (isCommentBlockStart(in, i)) {
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// <!-- comment --> start found
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openBracketsCount++;
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} else if (isCDATABlockStart(in, i)) {
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// <![CDATA[ start found
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openBracketsCount++;
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inCDATASection = true;
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}
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} else if (peekAheadByte == '?') {
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// <?xml ?> start found
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openBracketsCount++;
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}
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}
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} else if (readByte == '/') {
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} else if (!inCDATASection && readByte == '/') {
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if (i < bufferLength - 1 && in.getByte(i + 1) == '>') {
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// found />, decrementing openBracketsCount
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openBracketsCount--;
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@ -138,12 +143,18 @@ public class XmlFrameDecoder extends ByteToMessageDecoder {
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if (i - 1 > -1) {
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final byte peekBehindByte = in.getByte(i - 1);
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if (peekBehindByte == '?') {
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// an <?xml ?> tag was closed
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openBracketsCount--;
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} else if (peekBehindByte == '-' && i - 2 > -1 && in.getByte(i - 2) == '-') {
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// a <!-- comment --> was closed
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if (!inCDATASection) {
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if (peekBehindByte == '?') {
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// an <?xml ?> tag was closed
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openBracketsCount--;
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} else if (peekBehindByte == '-' && i - 2 > -1 && in.getByte(i - 2) == '-') {
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// a <!-- comment --> was closed
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openBracketsCount--;
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}
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} else if (peekBehindByte == ']' && i - 2 > -1 && in.getByte(i - 2) == ']') {
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// a <![CDATA[...]]> block was closed
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openBracketsCount--;
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inCDATASection = false;
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}
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}
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@ -157,7 +168,7 @@ public class XmlFrameDecoder extends ByteToMessageDecoder {
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final int readerIndex = in.readerIndex();
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if (openBracketsCount == 0 && length > 0) {
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if (length >= in.writerIndex()) {
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if (length >= bufferLength) {
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length = in.readableBytes();
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}
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final ByteBuf frame =
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@ -201,4 +212,22 @@ public class XmlFrameDecoder extends ByteToMessageDecoder {
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private static boolean isValidStartCharForXmlElement(final byte b) {
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return b >= 'a' && b <= 'z' || b >= 'A' && b <= 'Z' || b == ':' || b == '_';
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}
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private static boolean isCommentBlockStart(final ByteBuf in, final int i) {
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return i < in.writerIndex() - 3
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&& in.getByte(i + 2) == '-'
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&& in.getByte(i + 3) == '-';
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}
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private static boolean isCDATABlockStart(final ByteBuf in, final int i) {
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return i < in.writerIndex() - 8
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&& in.getByte(i + 2) == '['
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&& in.getByte(i + 3) == 'C'
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&& in.getByte(i + 4) == 'D'
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&& in.getByte(i + 5) == 'A'
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&& in.getByte(i + 6) == 'T'
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&& in.getByte(i + 7) == 'A'
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&& in.getByte(i + 8) == '[';
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}
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}
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@ -44,7 +44,10 @@ public class XmlFrameDecoderTest {
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private final List<String> xmlSamples;
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public XmlFrameDecoderTest() throws IOException, URISyntaxException {
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xmlSamples = Arrays.asList(sample("01"), sample("02"), sample("03"), sample("04"));
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xmlSamples = Arrays.asList(
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sample("01"), sample("02"), sample("03"),
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sample("04"), sample("05"), sample("06")
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);
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}
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@Test(expected = IllegalArgumentException.class)
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@ -98,19 +101,36 @@ public class XmlFrameDecoderTest {
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testDecodeWithXml(" \n\r \t<xxx/>\ttrash", "<xxx/>", CorruptedFrameException.class);
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}
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@Test
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public void testDecodeWithCDATABlock() {
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final String xml = "<book>" +
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"<![CDATA[K&R, a.k.a. Kernighan & Ritchie]]>" +
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"</book>";
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testDecodeWithXml(xml, xml);
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}
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@Test
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public void testDecodeWithCDATABlockContainingNestedUnbalancedXml() {
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// <br> isn't closed, also <a> should have been </a>
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final String xml = "<info>" +
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"<![CDATA[Copyright 2012-2013,<br><a href=\"http://www.acme.com\">ACME Inc.<a>]]>" +
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"</info>";
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testDecodeWithXml(xml, xml);
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}
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@Test
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public void testDecodeWithTwoMessages() {
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testDecodeWithXml(
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"<root xmlns=\"http://www.acme.com/acme\" status=\"loginok\" timestamp=\"1362410583776\"/>\n" +
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'\n' +
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"<root xmlns=\"http://www.acme.com/acme\" status=\"start\" time=\"0\" " +
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"timestamp=\"1362410584794\">\n<child active=\"1\" status=\"started\" id=\"935449\" " +
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"msgnr=\"2\"/>\n</root>",
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"<root xmlns=\"http://www.acme.com/acme\" status=\"loginok\" timestamp=\"1362410583776\"/>",
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"<root xmlns=\"http://www.acme.com/acme\" status=\"start\" time=\"0\" timestamp=\"1362410584794\">\n" +
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"<child active=\"1\" status=\"started\" id=\"935449\" msgnr=\"2\"/>\n" +
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"</root>"
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);
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final String input = "<root xmlns=\"http://www.acme.com/acme\" status=\"loginok\" " +
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"timestamp=\"1362410583776\"/>\n\n" +
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"<root xmlns=\"http://www.acme.com/acme\" status=\"start\" time=\"0\" " +
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"timestamp=\"1362410584794\">\n<child active=\"1\" status=\"started\" id=\"935449\" " +
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"msgnr=\"2\"/>\n</root>";
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final String frame1 = "<root xmlns=\"http://www.acme.com/acme\" status=\"loginok\" " +
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"timestamp=\"1362410583776\"/>";
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final String frame2 = "<root xmlns=\"http://www.acme.com/acme\" status=\"start\" time=\"0\" " +
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"timestamp=\"1362410584794\">\n<child active=\"1\" status=\"started\" id=\"935449\" " +
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"msgnr=\"2\"/>\n</root>";
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testDecodeWithXml(input, frame1, frame2);
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}
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@Test
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@ -0,0 +1,81 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<!-- this sample file tests CDATA sections -->
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<chapter id="rockets">
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<title>Rocket Launching</title>
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<sect1 id="rocket-configuration">
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<title>Configuration</title>
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<para>
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Configuring rockets should look very familiar if you're used
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to Jakarta Commons-Rocket or Commons-Space. You will first
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create a normal
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<literal>ContextSource</literal>
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then wrap it in a
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<literal>RocketContextSource</literal>
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.
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<informalexample>
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<programlisting><![CDATA[
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<beans>
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...
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<bean id="contextSource" class="org.apache.commons.rocket.factory.RocketContextSource">
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<property name="contextSource" ref="contextSourceTarget" />
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</bean>
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<bean id="contextSourceTarget" class="org.apache.commons.rocket.core.support.OrbitContextSource">
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<property name="url" value="orbit://localhost:12345" />
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<property name="user" value="neil" />
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<property name="password" value="secret" />
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<property name="pooled" value="false"/>
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</bean>
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...
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</beans>
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]]></programlisting>
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</informalexample>
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In a real world example you would probably configure the
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rocket options and enable connection validation; the above
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serves as an example to demonstrate the general idea.
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</para>
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<sect2 id="rocket-advanced-configuration">
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<title>Validation Configuration</title>
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<para>
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Adding validation and a few rocket configuration tweaks to
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the above example is straight forward. Inject a
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<literal>RocketContextValidator</literal>
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and set when validation should occur and the rocket is
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ready to go.
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<informalexample>
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<programlisting><![CDATA[
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<beans>
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...
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<bean id="contextSource" class="org.apache.commons.rocket.factory.RocketContextSource">
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<property name="contextSource" ref="contextSourceTarget" />
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<property name="rocketContextValidator" ref="rocketContextValidator" />
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<property name="testOnBorrow" value="true" />
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<property name="testWhileIdle" value="true" />
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</bean>
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<bean id="rocketContextValidator"
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class="org.apache.commons.space.validation.DefaultRocketContextValidator" />
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<bean id="contextSourceTarget" class="org.apache.commons.rocket.core.support.OrbitContextSource">
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<property name="url" value="orbit://localhost:12345" />
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<property name="user" value="neil" />
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<property name="password" value="secret" />
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<property name="pooled" value="false"/>
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</bean>
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...
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</beans>
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]]></programlisting>
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</informalexample>
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The above example will test each
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<literal>RocketContext</literal>
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before it is passed to the client application and test
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<literal>RocketContext</literal>
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s that have been sitting idle in orbit.
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</para>
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</sect2>
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</sect1>
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</chapter>
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@ -0,0 +1,62 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<!-- this sample file tests CDATA blocks with explicitly unbalanced xml inside -->
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<chapter id="rockets">
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<title>Rocket Launching</title>
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<sect1 id="rocket-configuration">
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<title>Configuration</title>
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<para>
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Configuring rockets should look very familiar if you're used
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to Jakarta Commons-Rocket or Commons-Space. You will first
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create a normal
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<literal>ContextSource</literal>
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then wrap it in a
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<literal>RocketContextSource</literal>
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.
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<informalexample>
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<programlisting><![CDATA[
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<beans>
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...
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<bean id="contextSource" class="org.apache.commons.rocket.factory.RocketContextSource">
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<property name="contextSource" ref="contextSourceTarget" />
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...
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]]></programlisting>
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</informalexample>
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In a real world example you would probably configure the
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rocket options and enable connection validation; the above
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serves as an example to demonstrate the general idea.
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</para>
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<sect2 id="rocket-advanced-configuration">
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<title>Validation Configuration</title>
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<para>
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Adding validation and a few rocket configuration tweaks to
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the above example is straight forward. Inject a
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<literal>RocketContextValidator</literal>
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and set when validation should occur and the rocket is
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ready to go.
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<informalexample>
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<programlisting><![CDATA[
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<beans>
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...
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<bean id="contextSource" class="org.apache.commons.rocket.factory.RocketContextSource">
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<property name="contextSource" ref="contextSourceTarget" />
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...
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<bean id="rocketContextValidator"
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...
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<bean id="contextSourceTarget" class="org.apache.commons.rocket.core.support.OrbitContextSource">
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<property name="url" value="orbit://localhost:12345" />
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...
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]]></programlisting>
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</informalexample>
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The above example will test each
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<literal>RocketContext</literal>
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before it is passed to the client application and test
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<literal>RocketContext</literal>
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s that have been sitting idle in orbit.
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</para>
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</sect2>
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</sect1>
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</chapter>
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