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org.apache.jasper.compiler.Parser Maven / Gradle / Ivy
/*
* 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.jasper.compiler;
import static org.apache.jasper.JasperMessages.MESSAGES;
import java.io.CharArrayWriter;
import java.io.FileNotFoundException;
import java.util.Collection;
import java.util.Iterator;
import java.util.regex.Pattern;
import javax.servlet.jsp.tagext.TagAttributeInfo;
import javax.servlet.jsp.tagext.TagFileInfo;
import javax.servlet.jsp.tagext.TagInfo;
import javax.servlet.jsp.tagext.TagLibraryInfo;
import org.apache.jasper.JasperException;
import org.apache.jasper.JspCompilationContext;
import org.apache.jasper.util.UniqueAttributesImpl;
import org.apache.tomcat.util.scan.Jar;
import org.xml.sax.Attributes;
import org.xml.sax.helpers.AttributesImpl;
/**
* This class implements a parser for a JSP page (non-xml view). JSP page
* grammar is included here for reference. The token '#' that appears in the
* production indicates the current input token location in the production.
*
* @author Kin-man Chung
* @author Shawn Bayern
* @author Mark Roth
*/
class Parser implements TagConstants {
private final ParserController parserController;
private final JspCompilationContext ctxt;
private final JspReader reader;
private Mark start;
private final ErrorDispatcher err;
private int scriptlessCount;
private final boolean isTagFile;
private final boolean directivesOnly;
private final Jar jar;
private final PageInfo pageInfo;
// Virtual body content types, to make parsing a little easier.
// These are not accessible from outside the parser.
private static final String JAVAX_BODY_CONTENT_PARAM =
"JAVAX_BODY_CONTENT_PARAM";
private static final String JAVAX_BODY_CONTENT_PLUGIN =
"JAVAX_BODY_CONTENT_PLUGIN";
private static final String JAVAX_BODY_CONTENT_TEMPLATE_TEXT =
"JAVAX_BODY_CONTENT_TEMPLATE_TEXT";
/* System property that controls if the strict white space rules are
* applied.
*/
private static final boolean STRICT_WHITESPACE = Boolean.parseBoolean(
System.getProperty(
"org.apache.jasper.compiler.Parser.STRICT_WHITESPACE",
"true"));
/**
* The constructor
*/
private Parser(ParserController pc, JspReader reader, boolean isTagFile,
boolean directivesOnly, Jar jar) {
this.parserController = pc;
this.ctxt = pc.getJspCompilationContext();
this.pageInfo = pc.getCompiler().getPageInfo();
this.err = pc.getCompiler().getErrorDispatcher();
this.reader = reader;
this.scriptlessCount = 0;
this.isTagFile = isTagFile;
this.directivesOnly = directivesOnly;
this.jar = jar;
start = reader.mark();
}
/**
* The main entry for Parser
*
* @param pc The ParseController, use for getting other objects in compiler
* and for parsing included pages
* @param reader To read the page
* @param parent The parent node to this page, null for top level page
* @param isTagFile Is the page being parsed a tag file?
* @param directivesOnly Should only directives be parsed?
* @param jar JAR, if any, that this page was loaded from
* @param pageEnc The encoding of the source
* @param jspConfigPageEnc The encoding for the page
* @param isDefaultPageEncoding Is the page encoding the default?
* @param isBomPresent Is a BOM present in the source
* @return list of nodes representing the parsed page
*
* @throws JasperException If an error occurs during parsing
*/
public static Node.Nodes parse(ParserController pc, JspReader reader,
Node parent, boolean isTagFile, boolean directivesOnly,
Jar jar, String pageEnc, String jspConfigPageEnc,
boolean isDefaultPageEncoding, boolean isBomPresent)
throws JasperException {
Parser parser = new Parser(pc, reader, isTagFile, directivesOnly, jar);
Node.Root root = new Node.Root(reader.mark(), parent, false);
root.setPageEncoding(pageEnc);
root.setJspConfigPageEncoding(jspConfigPageEnc);
root.setIsDefaultPageEncoding(isDefaultPageEncoding);
root.setIsBomPresent(isBomPresent);
// For the Top level page, add include-prelude and include-coda
PageInfo pageInfo = pc.getCompiler().getPageInfo();
if (parent == null && !isTagFile) {
parser.addInclude(root, pageInfo.getIncludePrelude());
}
if (directivesOnly) {
parser.parseFileDirectives(root);
} else {
while (reader.hasMoreInput()) {
parser.parseElements(root);
}
}
if (parent == null && !isTagFile) {
parser.addInclude(root, pageInfo.getIncludeCoda());
}
Node.Nodes page = new Node.Nodes(root);
return page;
}
/**
* Attributes ::= (S Attribute)* S?
*/
Attributes parseAttributes() throws JasperException {
return parseAttributes(false);
}
Attributes parseAttributes(boolean pageDirective) throws JasperException {
UniqueAttributesImpl attrs = new UniqueAttributesImpl(pageDirective);
reader.skipSpaces();
int ws = 1;
try {
while (parseAttribute(attrs)) {
if (ws == 0 && STRICT_WHITESPACE) {
err.jspError(reader.mark(),
"jsp.error.attribute.nowhitespace");
}
ws = reader.skipSpaces();
}
} catch (IllegalArgumentException iae) {
// Duplicate attribute
err.jspError(reader.mark(), "jsp.error.attribute.duplicate");
}
return attrs;
}
/**
* Parse Attributes for a reader, provided for external use
*
* @param pc The parser
* @param reader The source
*
* @return The parsed attributes
*
* @throws JasperException If an error occurs during parsing
*/
public static Attributes parseAttributes(ParserController pc,
JspReader reader) throws JasperException {
Parser tmpParser = new Parser(pc, reader, false, false, null);
return tmpParser.parseAttributes(true);
}
/**
* Attribute ::= Name S? Eq S? ( '"<%=' RTAttributeValueDouble | '"'
* AttributeValueDouble | "'<%=" RTAttributeValueSingle | "'"
* AttributeValueSingle } Note: JSP and XML spec does not allow while spaces
* around Eq. It is added to be backward compatible with Tomcat, and with
* other xml parsers.
*/
private boolean parseAttribute(AttributesImpl attrs)
throws JasperException {
// Get the qualified name
String qName = parseName();
if (qName == null)
return false;
boolean ignoreEL = pageInfo.isELIgnored();
// Determine prefix and local name components
String localName = qName;
String uri = "";
int index = qName.indexOf(':');
if (index != -1) {
String prefix = qName.substring(0, index);
uri = pageInfo.getURI(prefix);
if (uri == null) {
err.jspError(reader.mark(), MESSAGES.invalidAttributePrefix(prefix));
}
localName = qName.substring(index + 1);
}
reader.skipSpaces();
if (!reader.matches("="))
err.jspError(reader.mark(), MESSAGES.missingEqual());
reader.skipSpaces();
char quote = (char) reader.nextChar();
if (quote != '\'' && quote != '"')
err.jspError(reader.mark(), MESSAGES.missingQuote());
String watchString = "";
if (reader.matches("<%=")) {
watchString = "%>";
// Can't embed EL in a script expression
ignoreEL = true;
}
watchString = watchString + quote;
String attrValue = parseAttributeValue(qName, watchString, ignoreEL);
attrs.addAttribute(uri, localName, qName, "CDATA", attrValue);
return true;
}
/**
* Name ::= (Letter | '_' | ':') (Letter | Digit | '.' | '_' | '-' | ':')*
*/
private String parseName() {
char ch = (char) reader.peekChar();
if (Character.isLetter(ch) || ch == '_' || ch == ':') {
StringBuilder buf = new StringBuilder();
buf.append(ch);
reader.nextChar();
ch = (char) reader.peekChar();
while (Character.isLetter(ch) || Character.isDigit(ch) || ch == '.'
|| ch == '_' || ch == '-' || ch == ':') {
buf.append(ch);
reader.nextChar();
ch = (char) reader.peekChar();
}
return buf.toString();
}
return null;
}
/**
* AttributeValueDouble ::= (QuotedChar - '"')* ('"' | )
* RTAttributeValueDouble ::= ((QuotedChar - '"')* - ((QuotedChar-'"')'%>"')
* ('%>"' | TRANSLATION_ERROR)
*/
private String parseAttributeValue(String qName, String watch, boolean ignoreEL) throws JasperException {
boolean quoteAttributeEL = ctxt.getOptions().getQuoteAttributeEL();
Mark start = reader.mark();
// In terms of finding the end of the value, quoting EL is equivalent to
// ignoring it.
Mark stop = reader.skipUntilIgnoreEsc(watch, ignoreEL || quoteAttributeEL);
if (stop == null) {
err.jspError(start, MESSAGES.unterminatedAttribute(watch));
}
String ret = null;
try {
char quote = watch.charAt(watch.length() - 1);
// If watch is longer than 1 character this is a scripting
// expression and EL is always ignored
boolean isElIgnored =
pageInfo.isELIgnored() || watch.length() > 1;
ret = AttributeParser.getUnquoted(reader.getText(start, stop),
quote, isElIgnored,
pageInfo.isDeferredSyntaxAllowedAsLiteral(),
ctxt.getOptions().getStrictQuoteEscaping(),
quoteAttributeEL);
} catch (IllegalArgumentException iae) {
err.jspError(start, iae, MESSAGES.errorUnquotingAttributeValue());
}
if (watch.length() == 1) // quote
return ret;
// Put back delimiter '<%=' and '%>', since they are needed if the
// attribute does not allow RTexpression.
return "<%=" + ret + "%>";
}
private String parseScriptText(String tx) {
CharArrayWriter cw = new CharArrayWriter();
int size = tx.length();
int i = 0;
while (i < size) {
char ch = tx.charAt(i);
if (i + 2 < size && ch == '%' && tx.charAt(i + 1) == '\\'
&& tx.charAt(i + 2) == '>') {
cw.write('%');
cw.write('>');
i += 3;
} else {
cw.write(ch);
++i;
}
}
cw.close();
return cw.toString();
}
/*
* Invokes parserController to parse the included page
*/
private void processIncludeDirective(String file, Node parent)
throws JasperException {
if (file == null) {
return;
}
try {
parserController.parse(file, parent, jar);
} catch (FileNotFoundException ex) {
err.jspError(start, MESSAGES.fileNotFound(file));
} catch (Exception ex) {
err.jspError(start, ex, MESSAGES.errorIncluding(file));
}
}
/*
* Parses a page directive with the following syntax: PageDirective ::= ( S
* Attribute)*
*/
private void parsePageDirective(Node parent) throws JasperException {
Attributes attrs = parseAttributes(true);
Node.PageDirective n = new Node.PageDirective(attrs, start, parent);
/*
* A page directive may contain multiple 'import' attributes, each of
* which consists of a comma-separated list of package names. Store each
* list with the node, where it is parsed.
*/
for (int i = 0; i < attrs.getLength(); i++) {
if ("import".equals(attrs.getQName(i))) {
n.addImport(attrs.getValue(i));
}
}
}
/*
* Parses an include directive with the following syntax: IncludeDirective
* ::= ( S Attribute)*
*/
private void parseIncludeDirective(Node parent) throws JasperException {
Attributes attrs = parseAttributes();
// Included file expanded here
Node includeNode = new Node.IncludeDirective(attrs, start, parent);
processIncludeDirective(attrs.getValue("file"), includeNode);
}
/**
* Add a list of files. This is used for implementing include-prelude and
* include-coda of jsp-config element in web.xml
*/
private void addInclude(Node parent, Collection files) throws JasperException {
if (files != null) {
Iterator iter = files.iterator();
while (iter.hasNext()) {
String file = iter.next();
AttributesImpl attrs = new AttributesImpl();
attrs.addAttribute("", "file", "file", "CDATA", file);
// Create a dummy Include directive node
Node includeNode = new Node.IncludeDirective(attrs, reader
.mark(), parent);
processIncludeDirective(file, includeNode);
}
}
}
/*
* Parses a taglib directive with the following syntax: Directive ::= ( S
* Attribute)*
*/
private void parseTaglibDirective(Node parent) throws JasperException {
Attributes attrs = parseAttributes();
String uri = attrs.getValue("uri");
String prefix = attrs.getValue("prefix");
if (prefix != null) {
Mark prevMark = pageInfo.getNonCustomTagPrefix(prefix);
if (prevMark != null) {
err.jspError(reader.mark(), MESSAGES.prefixAlreadyInUse
(prefix, prevMark.getFile(), prevMark.getLineNumber()));
}
if (uri != null) {
String uriPrev = pageInfo.getURI(prefix);
if (uriPrev != null && !uriPrev.equals(uri)) {
err.jspError(reader.mark(), MESSAGES.prefixRedefinition(prefix, uri, uriPrev));
}
if (pageInfo.getTaglib(uri) == null) {
TagLibraryInfoImpl impl = null;
if (ctxt.getOptions().isCaching()) {
impl = (TagLibraryInfoImpl) ctxt.getOptions()
.getCache().get(uri);
}
if (impl == null) {
String[] location = ctxt.getTldLocation(uri);
impl = new TagLibraryInfoImpl(ctxt, parserController, pageInfo,
prefix, uri, location, err);
if (ctxt.getOptions().isCaching()) {
ctxt.getOptions().getCache().put(uri, impl);
}
} else {
// Current compilation context needs location of cached
// tag files
for (TagFileInfo info : impl.getTagFiles()) {
ctxt.setTagFileJarUrl(info.getPath(), ctxt.getTagFileJarUrl(info.getPath()));
}
}
pageInfo.addTaglib(uri, impl);
}
pageInfo.addPrefixMapping(prefix, uri);
} else {
String tagdir = attrs.getValue("tagdir");
if (tagdir != null) {
String urnTagdir = URN_JSPTAGDIR + tagdir;
if (pageInfo.getTaglib(urnTagdir) == null) {
pageInfo.addTaglib(urnTagdir,
new ImplicitTagLibraryInfo(ctxt,
parserController, pageInfo, prefix,
tagdir, err));
}
pageInfo.addPrefixMapping(prefix, urnTagdir);
}
}
}
@SuppressWarnings("unused")
Node unused = new Node.TaglibDirective(attrs, start, parent);
}
/*
* Parses a directive with the following syntax: Directive ::= S? ( 'page'
* PageDirective | 'include' IncludeDirective | 'taglib' TagLibDirective) S?
* '%>'
*
* TagDirective ::= S? ('tag' PageDirective | 'include' IncludeDirective |
* 'taglib' TagLibDirective) | 'attribute AttributeDirective | 'variable
* VariableDirective S? '%>'
*/
private void parseDirective(Node parent) throws JasperException {
reader.skipSpaces();
String directive = null;
if (reader.matches("page")) {
directive = "<%@ page";
if (isTagFile) {
err.jspError(reader.mark(), MESSAGES.invalidDirectiveInTagFile(directive));
}
parsePageDirective(parent);
} else if (reader.matches("include")) {
directive = "<%@ include";
parseIncludeDirective(parent);
} else if (reader.matches("taglib")) {
if (directivesOnly) {
// No need to get the tagLibInfo objects. This alos suppresses
// parsing of any tag files used in this tag file.
return;
}
directive = "<%@ taglib";
parseTaglibDirective(parent);
} else if (reader.matches("tag")) {
directive = "<%@ tag";
if (!isTagFile) {
err.jspError(reader.mark(), MESSAGES.invalidDirectiveInPage(directive));
}
parseTagDirective(parent);
} else if (reader.matches("attribute")) {
directive = "<%@ attribute";
if (!isTagFile) {
err.jspError(reader.mark(), MESSAGES.invalidDirectiveInPage(directive));
}
parseAttributeDirective(parent);
} else if (reader.matches("variable")) {
directive = "<%@ variable";
if (!isTagFile) {
err.jspError(reader.mark(), MESSAGES.invalidDirectiveInPage(directive));
}
parseVariableDirective(parent);
} else {
err.jspError(reader.mark(), MESSAGES.invalidDirective());
}
reader.skipSpaces();
if (!reader.matches("%>")) {
err.jspError(start, MESSAGES.unterminatedTag(directive));
}
}
/*
* Parses a directive with the following syntax:
*
* XMLJSPDirectiveBody ::= S? ( ( 'page' PageDirectiveAttrList S? ( '/>' | (
* '>' S? ETag ) ) | ( 'include' IncludeDirectiveAttrList S? ( '/>' | ( '>'
* S? ETag ) ) |
*
* XMLTagDefDirectiveBody ::= ( ( 'tag' TagDirectiveAttrList S? ( '/>' | (
* '>' S? ETag ) ) | ( 'include' IncludeDirectiveAttrList S? ( '/>' | ( '>'
* S? ETag ) ) | ( 'attribute' AttributeDirectiveAttrList S? ( '/>' | ( '>'
* S? ETag ) ) | ( 'variable' VariableDirectiveAttrList S? ( '/>' | ( '>' S?
* ETag ) ) ) |
*/
private void parseXMLDirective(Node parent) throws JasperException {
reader.skipSpaces();
String eTag = null;
if (reader.matches("page")) {
eTag = "jsp:directive.page";
if (isTagFile) {
err.jspError(reader.mark(), MESSAGES.invalidDirectiveInTagFile("<" + eTag));
}
parsePageDirective(parent);
} else if (reader.matches("include")) {
eTag = "jsp:directive.include";
parseIncludeDirective(parent);
} else if (reader.matches("tag")) {
eTag = "jsp:directive.tag";
if (!isTagFile) {
err.jspError(reader.mark(), MESSAGES.invalidDirectiveInPage("<" + eTag));
}
parseTagDirective(parent);
} else if (reader.matches("attribute")) {
eTag = "jsp:directive.attribute";
if (!isTagFile) {
err.jspError(reader.mark(), MESSAGES.invalidDirectiveInPage("<" + eTag));
}
parseAttributeDirective(parent);
} else if (reader.matches("variable")) {
eTag = "jsp:directive.variable";
if (!isTagFile) {
err.jspError(reader.mark(), MESSAGES.invalidDirectiveInPage("<" + eTag));
}
parseVariableDirective(parent);
} else {
err.jspError(reader.mark(), MESSAGES.invalidDirective());
}
reader.skipSpaces();
if (reader.matches(">")) {
reader.skipSpaces();
if (!reader.matchesETag(eTag)) {
err.jspError(start, MESSAGES.unterminatedTag("<" + eTag));
}
} else if (!reader.matches("/>")) {
err.jspError(start, MESSAGES.unterminatedTag("<" + eTag));
}
}
/*
* Parses a tag directive with the following syntax: PageDirective ::= ( S
* Attribute)*
*/
private void parseTagDirective(Node parent) throws JasperException {
Attributes attrs = parseAttributes(true);
Node.TagDirective n = new Node.TagDirective(attrs, start, parent);
/*
* A page directive may contain multiple 'import' attributes, each of
* which consists of a comma-separated list of package names. Store each
* list with the node, where it is parsed.
*/
for (int i = 0; i < attrs.getLength(); i++) {
if ("import".equals(attrs.getQName(i))) {
n.addImport(attrs.getValue(i));
}
}
}
/*
* Parses a attribute directive with the following syntax:
* AttributeDirective ::= ( S Attribute)*
*/
private void parseAttributeDirective(Node parent) throws JasperException {
Attributes attrs = parseAttributes();
@SuppressWarnings("unused")
Node unused = new Node.AttributeDirective(attrs, start, parent);
}
/*
* Parses a variable directive with the following syntax:
* PageDirective ::= ( S Attribute)*
*/
private void parseVariableDirective(Node parent) throws JasperException {
Attributes attrs = parseAttributes();
@SuppressWarnings("unused")
Node unused = new Node.VariableDirective(attrs, start, parent);
}
/*
* JSPCommentBody ::= (Char* - (Char* '--%>')) '--%>'
*/
private void parseComment(Node parent) throws JasperException {
start = reader.mark();
Mark stop = reader.skipUntil("--%>");
if (stop == null) {
err.jspError(start, MESSAGES.unterminatedTag("<%--"));
}
@SuppressWarnings("unused")
Node unused =
new Node.Comment(reader.getText(start, stop), start, parent);
}
/*
* DeclarationBody ::= (Char* - (char* '%>')) '%>'
*/
private void parseDeclaration(Node parent) throws JasperException {
start = reader.mark();
Mark stop = reader.skipUntil("%>");
if (stop == null) {
err.jspError(start, MESSAGES.unterminatedTag("<%!"));
}
@SuppressWarnings("unused")
Node unused = new Node.Declaration(
parseScriptText(reader.getText(start, stop)), start, parent);
}
/*
* XMLDeclarationBody ::= ( S? '/>' ) | ( S? '>' (Char* - (char* '<'))
* CDSect?)* ETag | CDSect ::= CDStart CData CDEnd
* CDStart ::= '' Char*)) CDEnd
* ::= ']]>'
*/
private void parseXMLDeclaration(Node parent) throws JasperException {
reader.skipSpaces();
if (!reader.matches("/>")) {
if (!reader.matches(">")) {
err.jspError(start, MESSAGES.unterminatedTag("<jsp:declaration>"));
}
Mark stop;
String text;
while (true) {
start = reader.mark();
stop = reader.skipUntil("<");
if (stop == null) {
err.jspError(start, MESSAGES.unterminatedTag("<jsp:declaration>"));
}
text = parseScriptText(reader.getText(start, stop));
@SuppressWarnings("unused")
Node unused = new Node.Declaration(text, start, parent);
if (reader.matches("![CDATA[")) {
start = reader.mark();
stop = reader.skipUntil("]]>");
if (stop == null) {
err.jspError(start, MESSAGES.unterminatedTag("CDATA"));
}
text = parseScriptText(reader.getText(start, stop));
@SuppressWarnings("unused")
Node unused2 = new Node.Declaration(text, start, parent);
} else {
break;
}
}
if (!reader.matchesETagWithoutLessThan("jsp:declaration")) {
err.jspError(start, MESSAGES.unterminatedTag("<jsp:declaration>"));
}
}
}
/*
* ExpressionBody ::= (Char* - (char* '%>')) '%>'
*/
private void parseExpression(Node parent) throws JasperException {
start = reader.mark();
Mark stop = reader.skipUntil("%>");
if (stop == null) {
err.jspError(start, MESSAGES.unterminatedTag("<%="));
}
String expression = reader.getText(start, stop);
// check for string concatenation inside expressions, separating from expression allows for optimizations later on
if(!this.ctxt.getOptions().isOptimizeJSPScriptlets()){
new Node.Expression(parseScriptText(expression),
start, parent);
}
else {
if (!matchesConcat(expression)) {
new Node.Expression(parseScriptText(expression),
start, parent);
} else {
//need to separate expressions being concatenated
expression = expression.replaceAll("\\+\\s*\"", "\\+ \"").replaceAll("\"\\s*\\+", "\" \\+");
String[] tokens = expression.split("((?=\\+\\s\")|(?<=\"\\s\\+))");
if (tokens.length > 1) {
for (String token : tokens) {
if (matchesStringLiteral(token) && !matchesStringParam(token)) {
//maybe evaluate the expression here before storing as text node?
new Node.TemplateText(cleanTextToken(token),
start, parent);
} else {
String parsedScripText = parseScriptText(cleanExprToken(token));
if ( ! "".equals( parsedScripText )){
new Node.Expression(parsedScripText,
start, parent);
}
}
}
} else {
//only have one token, therefore there is no string concatenation occurring and string literal is being used as part of expression
new Node.Expression(parseScriptText(tokens[0]),
start, parent);
}
}
}
}
private boolean matchesStringLiteral(String token) {
return Pattern.compile("\"").matcher(token).find() || "".equals(token.trim());
}
private boolean matchesStringParam(String token) {
return Pattern.compile("\"\\s*\\)|\\(\\s*\"").matcher(token).find();
}
private boolean matchesConcat(String token) {
return Pattern.compile("\\+\\s*\"|\"\\s*\\+").matcher(token).find();
}
private String cleanTextToken(String token) {
return cleanExprToken(token.trim().replaceAll("(?' ) | ( S? '>' (Char* - (char* '<'))
* CDSect?)* ETag ) |
*/
private void parseXMLExpression(Node parent) throws JasperException {
reader.skipSpaces();
if (!reader.matches("/>")) {
if (!reader.matches(">")) {
err.jspError(start, MESSAGES.unterminatedTag("<jsp:expression>"));
}
Mark stop;
String text;
while (true) {
start = reader.mark();
stop = reader.skipUntil("<");
if (stop == null) {
err.jspError(start, MESSAGES.unterminatedTag("<jsp:expression>"));
}
text = parseScriptText(reader.getText(start, stop));
@SuppressWarnings("unused")
Node unused = new Node.Expression(text, start, parent);
if (reader.matches("![CDATA[")) {
start = reader.mark();
stop = reader.skipUntil("]]>");
if (stop == null) {
err.jspError(start, MESSAGES.unterminatedTag("CDATA"));
}
text = parseScriptText(reader.getText(start, stop));
@SuppressWarnings("unused")
Node unused2 = new Node.Expression(text, start, parent);
} else {
break;
}
}
if (!reader.matchesETagWithoutLessThan("jsp:expression")) {
err.jspError(start, MESSAGES.unterminatedTag("<jsp:expression>"));
}
}
}
/*
* ELExpressionBody. Starts with "#{" or "${". Ends with "}".
* See JspReader.skipELExpression().
*/
private void parseELExpression(Node parent, char type)
throws JasperException {
start = reader.mark();
Mark last = reader.skipELExpression();
if (last == null) {
err.jspError(start, "jsp.error.unterminated", type + "{");
}
@SuppressWarnings("unused")
Node unused = new Node.ELExpression(type, reader.getText(start, last),
start, parent);
}
/*
* ScriptletBody ::= (Char* - (char* '%>')) '%>'
*/
private void parseScriptlet(Node parent) throws JasperException {
start = reader.mark();
Mark stop = reader.skipUntil("%>");
if (stop == null) {
err.jspError(start, MESSAGES.unterminatedTag("<%"));
}
@SuppressWarnings("unused")
Node unused = new Node.Scriptlet(
parseScriptText(reader.getText(start, stop)), start, parent);
}
/*
* XMLScriptletBody ::= ( S? '/>' ) | ( S? '>' (Char* - (char* '<'))
* CDSect?)* ETag ) |
*/
private void parseXMLScriptlet(Node parent) throws JasperException {
reader.skipSpaces();
if (!reader.matches("/>")) {
if (!reader.matches(">")) {
err.jspError(start, MESSAGES.unterminatedTag("<jsp:scriptlet>"));
}
Mark stop;
String text;
while (true) {
start = reader.mark();
stop = reader.skipUntil("<");
if (stop == null) {
err.jspError(start, MESSAGES.unterminatedTag("<jsp:scriptlet>"));
}
text = parseScriptText(reader.getText(start, stop));
@SuppressWarnings("unused")
Node unused = new Node.Scriptlet(text, start, parent);
if (reader.matches("![CDATA[")) {
start = reader.mark();
stop = reader.skipUntil("]]>");
if (stop == null) {
err.jspError(start, MESSAGES.unterminatedTag("CDATA"));
}
text = parseScriptText(reader.getText(start, stop));
@SuppressWarnings("unused")
Node unused2 = new Node.Scriptlet(text, start, parent);
} else {
break;
}
}
if (!reader.matchesETagWithoutLessThan("jsp:scriptlet")) {
err.jspError(start, MESSAGES.unterminatedTag("<jsp:scriptlet>"));
}
}
}
/**
* Param ::= '' S? ( ' ) S? ETag ) | ( '>' S? Param* ETag )
*
* EmptyBody ::= '/>' | ( '>' ETag ) | ( '>' S? '' Param* ''
*/
private void parseInclude(Node parent) throws JasperException {
Attributes attrs = parseAttributes();
reader.skipSpaces();
Node includeNode = new Node.IncludeAction(attrs, start, parent);
parseOptionalBody(includeNode, "jsp:include", JAVAX_BODY_CONTENT_PARAM);
}
/*
* For Forward: StdActionContent ::= Attributes ParamBody
*/
private void parseForward(Node parent) throws JasperException {
Attributes attrs = parseAttributes();
reader.skipSpaces();
Node forwardNode = new Node.ForwardAction(attrs, start, parent);
parseOptionalBody(forwardNode, "jsp:forward", JAVAX_BODY_CONTENT_PARAM);
}
private void parseInvoke(Node parent) throws JasperException {
Attributes attrs = parseAttributes();
reader.skipSpaces();
Node invokeNode = new Node.InvokeAction(attrs, start, parent);
parseEmptyBody(invokeNode, "jsp:invoke");
}
private void parseDoBody(Node parent) throws JasperException {
Attributes attrs = parseAttributes();
reader.skipSpaces();
Node doBodyNode = new Node.DoBodyAction(attrs, start, parent);
parseEmptyBody(doBodyNode, "jsp:doBody");
}
private void parseElement(Node parent) throws JasperException {
Attributes attrs = parseAttributes();
reader.skipSpaces();
Node elementNode = new Node.JspElement(attrs, start, parent);
parseOptionalBody(elementNode, "jsp:element", TagInfo.BODY_CONTENT_JSP);
}
/*
* For GetProperty: StdActionContent ::= Attributes EmptyBody
*/
private void parseGetProperty(Node parent) throws JasperException {
Attributes attrs = parseAttributes();
reader.skipSpaces();
Node getPropertyNode = new Node.GetProperty(attrs, start, parent);
parseOptionalBody(getPropertyNode, "jsp:getProperty",
TagInfo.BODY_CONTENT_EMPTY);
}
/*
* For SetProperty: StdActionContent ::= Attributes EmptyBody
*/
private void parseSetProperty(Node parent) throws JasperException {
Attributes attrs = parseAttributes();
reader.skipSpaces();
Node setPropertyNode = new Node.SetProperty(attrs, start, parent);
parseOptionalBody(setPropertyNode, "jsp:setProperty",
TagInfo.BODY_CONTENT_EMPTY);
}
/*
* EmptyBody ::= '/>' | ( '>' ETag ) | ( '>' S? '' ETag ) | ( '>' S? '' Body ETag )
*
* ScriptlessActionBody ::= JspAttributeAndBody | ( '>' ScriptlessBody ETag )
*
* TagDependentActionBody ::= JspAttributeAndBody | ( '>' TagDependentBody
* ETag )
*
*/
private void parseOptionalBody(Node parent, String tag, String bodyType)
throws JasperException {
if (reader.matches("/>")) {
// EmptyBody
return;
}
if (!reader.matches(">")) {
err.jspError(reader.mark(), MESSAGES.unterminatedTag("<" + tag));
}
if (reader.matchesETag(tag)) {
// EmptyBody
return;
}
if (!parseJspAttributeAndBody(parent, tag, bodyType)) {
// Must be ( '>' # Body ETag )
parseBody(parent, tag, bodyType);
}
}
/**
* Attempts to parse 'JspAttributeAndBody' production. Returns true if it
* matched, or false if not. Assumes EmptyBody is okay as well.
*
* JspAttributeAndBody ::= ( '>' # S? ( ' ) S? ETag )
*/
private boolean parseJspAttributeAndBody(Node parent, String tag,
String bodyType) throws JasperException {
boolean result = false;
if (reader.matchesOptionalSpacesFollowedBy(" elements:
parseNamedAttributes(parent);
result = true;
}
if (reader.matchesOptionalSpacesFollowedBy(" but something other than
// or the end tag, translation error.
err.jspError(reader.mark(), MESSAGES.invalidTagBody("<" + tag));
}
return result;
}
/*
* Params ::= `>' S? ( ( `' ( ( S? Param+ S? ` ' ) |
* ) ) | Param+ ) ''
*/
private void parseJspParams(Node parent) throws JasperException {
Node jspParamsNode = new Node.ParamsAction(start, parent);
parseOptionalBody(jspParamsNode, "jsp:params", JAVAX_BODY_CONTENT_PARAM);
}
/*
* Fallback ::= '/>' | ( `>' S? `' ( ( S? ( Char* - ( Char* ` ' ) ) ` '
* S? ) | ) `' ) | ( '>' ( Char* - (
* Char* '' ) ) '' )
*/
private void parseFallBack(Node parent) throws JasperException {
Node fallBackNode = new Node.FallBackAction(start, parent);
parseOptionalBody(fallBackNode, "jsp:fallback",
JAVAX_BODY_CONTENT_TEMPLATE_TEXT);
}
/*
* For Plugin: StdActionContent ::= Attributes PluginBody
*
* PluginBody ::= EmptyBody | ( '>' S? ( ' ) S? ETag ) | ( '>' S? PluginTags
* ETag )
*
* EmptyBody ::= '/>' | ( '>' ETag ) | ( '>' S? '
*
* Attributes ::= ( S Attribute )* S?
*
* CustomActionEnd ::= CustomActionTagDependent | CustomActionJSPContent |
* CustomActionScriptlessContent
*
* CustomActionTagDependent ::= TagDependentOptionalBody
*
* CustomActionJSPContent ::= OptionalBody
*
* CustomActionScriptlessContent ::= ScriptlessOptionalBody
*/
@SuppressWarnings("null") // tagFileInfo can't be null after initial test
private boolean parseCustomTag(Node parent) throws JasperException {
if (reader.peekChar() != '<') {
return false;
}
// Parse 'CustomAction' production (tag prefix and custom action name)
reader.nextChar(); // skip '<'
String tagName = reader.parseToken(false);
int i = tagName.indexOf(':');
if (i == -1) {
reader.reset(start);
return false;
}
String prefix = tagName.substring(0, i);
String shortTagName = tagName.substring(i + 1);
// Check if this is a user-defined tag.
String uri = pageInfo.getURI(prefix);
if (uri == null) {
if (pageInfo.isErrorOnUndeclaredNamespace()) {
err.jspError(start, MESSAGES.unknownTagPrefix(shortTagName, prefix));
} else {
reader.reset(start);
// Remember the prefix for later error checking
pageInfo.putNonCustomTagPrefix(prefix, reader.mark());
return false;
}
}
TagLibraryInfo tagLibInfo = pageInfo.getTaglib(uri);
TagInfo tagInfo = tagLibInfo.getTag(shortTagName);
TagFileInfo tagFileInfo = tagLibInfo.getTagFile(shortTagName);
if (tagInfo == null && tagFileInfo == null) {
err.jspError(start, MESSAGES.unknownTagPrefix(shortTagName, prefix));
}
Class tagHandlerClass = null;
if (tagInfo != null) {
// Must be a classic tag, load it here.
// tag files will be loaded later, in TagFileProcessor
String handlerClassName = tagInfo.getTagClassName();
try {
tagHandlerClass = ctxt.getClassLoader().loadClass(
handlerClassName);
} catch (Exception e) {
err.jspError(start, MESSAGES.errorLoadingTagHandler(handlerClassName, tagName));
}
}
// Parse 'CustomActionBody' production:
// At this point we are committed - if anything fails, we produce
// a translation error.
// Parse 'Attributes' production:
Attributes attrs = parseAttributes();
reader.skipSpaces();
// Parse 'CustomActionEnd' production:
if (reader.matches("/>")) {
if (tagInfo != null) {
@SuppressWarnings("unused")
Node unused = new Node.CustomTag(tagName, prefix, shortTagName,
uri, attrs, start, parent, tagInfo, tagHandlerClass);
} else {
@SuppressWarnings("unused")
Node unused = new Node.CustomTag(tagName, prefix, shortTagName,
uri, attrs, start, parent, tagFileInfo);
}
return true;
}
// Now we parse one of 'CustomActionTagDependent',
// 'CustomActionJSPContent', or 'CustomActionScriptlessContent'.
// depending on body-content in TLD.
// Looking for a body, it still can be empty; but if there is a
// a tag body, its syntax would be dependent on the type of
// body content declared in the TLD.
String bc;
if (tagInfo != null) {
bc = tagInfo.getBodyContent();
} else {
bc = tagFileInfo.getTagInfo().getBodyContent();
}
Node tagNode = null;
if (tagInfo != null) {
tagNode = new Node.CustomTag(tagName, prefix, shortTagName, uri,
attrs, start, parent, tagInfo, tagHandlerClass);
} else {
tagNode = new Node.CustomTag(tagName, prefix, shortTagName, uri,
attrs, start, parent, tagFileInfo);
}
parseOptionalBody(tagNode, tagName, bc);
return true;
}
/*
* Parse for a template text string until '<' or "${" or "#{" is encountered,
* recognizing escape sequences "<\%", "\$", and "\#".
*
* Note: JSP uses '\$' as an escape for '$' and '\#' for '#' whereas EL uses
* '\${' for '${' and '\#{' for '#{'. We are processing JSP template
* test here so the JSP escapes apply.
*/
private void parseTemplateText(Node parent) {
if (!reader.hasMoreInput())
return;
CharArrayWriter ttext = new CharArrayWriter();
int ch = reader.nextChar();
while (ch != -1) {
if (ch == '<') {
// Check for "<\%"
if (reader.peekChar(0) == '\\' && reader.peekChar(1) == '%') {
ttext.write(ch);
// Swallow the \
reader.nextChar();
ttext.write(reader.nextChar());
} else {
if (ttext.size() == 0) {
ttext.write(ch);
} else {
reader.pushChar();
break;
}
}
} else if (ch == '\\' && !pageInfo.isELIgnored()) {
int next = reader.peekChar(0);
if (next == '$' || next == '#') {
ttext.write(reader.nextChar());
} else {
ttext.write(ch);
}
} else if ((ch == '$' || ch == '#' && !pageInfo.isDeferredSyntaxAllowedAsLiteral()) &&
!pageInfo.isELIgnored()) {
if (reader.peekChar(0) == '{') {
reader.pushChar();
break;
} else {
ttext.write(ch);
}
} else {
ttext.write(ch);
}
ch = reader.nextChar();
}
@SuppressWarnings("unused")
Node unused = new Node.TemplateText(ttext.toString(), start, parent);
}
/*
* XMLTemplateText ::= ( S? '/>' ) | ( S? '>' ( ( Char* - ( Char* ( '<' |
* '${' ) ) ) ( '${' ELExpressionBody )? CDSect? )* ETag ) |
*
*/
private void parseXMLTemplateText(Node parent) throws JasperException {
reader.skipSpaces();
if (!reader.matches("/>")) {
if (!reader.matches(">")) {
err.jspError(start, MESSAGES.unterminatedTag("<jsp:text>"));
}
CharArrayWriter ttext = new CharArrayWriter();
int ch = reader.nextChar();
while (ch != -1) {
if (ch == '<') {
// Check for ");
if (stop == null) {
err.jspError(start, MESSAGES.unterminatedTag("CDATA"));
}
String text = reader.getText(start, stop);
ttext.write(text, 0, text.length());
} else if (ch == '\\') {
int next = reader.peekChar(0);
if (next == '$' || next =='#') {
ttext.write(reader.nextChar());
} else {
ttext.write('\\');
}
} else if (ch == '$' || ch == '#') {
if (reader.peekChar(0) == '{') {
// Swallow the '{'
reader.nextChar();
// Create a template text node
@SuppressWarnings("unused")
Node unused = new Node.TemplateText(
ttext.toString(), start, parent);
// Mark and parse the EL expression and create its node:
parseELExpression(parent, (char) ch);
start = reader.mark();
ttext.reset();
} else {
ttext.write(ch);
}
} else {
ttext.write(ch);
}
ch = reader.nextChar();
}
@SuppressWarnings("unused")
Node unused =
new Node.TemplateText(ttext.toString(), start, parent);
if (!reader.hasMoreInput()) {
err.jspError(start, MESSAGES.unterminatedTag("<jsp:text>"));
} else if (!reader.matchesETagWithoutLessThan("jsp:text")) {
err.jspError(start, MESSAGES.badContent());
}
}
}
/*
* AllBody ::= ( '<%--' JSPCommentBody ) | ( '<%@' DirectiveBody ) | ( ' 0) {
// vc: ScriptlessBody
// We must follow the ScriptlessBody production if one of
// our parents is ScriptlessBody.
parseElementsScriptless(parent);
return;
}
start = reader.mark();
if (reader.matches("<%--")) {
parseComment(parent);
} else if (reader.matches("<%@")) {
parseDirective(parent);
} else if (reader.matches(" ) | ( ' ) | ( '<%=' ) | ( ' ) | ( '<%' ) | ( ' ) | ( ' ) | ( ' ) | ( '<%=' ) | ( ' ) | ( '<%' ) | ( ' ) | ( ' ) | ( '${'
* ) | ( ' ) | TemplateText
*/
private void parseElementsTemplateText(Node parent) throws JasperException {
start = reader.mark();
if (reader.matches("<%--")) {
parseComment(parent);
} else if (reader.matches("<%@")) {
parseDirective(parent);
} else if (reader.matches(" from the enclosing node
*/
private String getAttributeBodyType(Node n, String name) {
if (n instanceof Node.CustomTag) {
TagInfo tagInfo = ((Node.CustomTag) n).getTagInfo();
TagAttributeInfo[] tldAttrs = tagInfo.getAttributes();
for (int i = 0; i < tldAttrs.length; i++) {
if (name.equals(tldAttrs[i].getName())) {
if (tldAttrs[i].isFragment()) {
return TagInfo.BODY_CONTENT_SCRIPTLESS;
}
if (tldAttrs[i].canBeRequestTime()) {
return TagInfo.BODY_CONTENT_JSP;
}
}
}
if (tagInfo.hasDynamicAttributes()) {
return TagInfo.BODY_CONTENT_JSP;
}
} else if (n instanceof Node.IncludeAction) {
if ("page".equals(name)) {
return TagInfo.BODY_CONTENT_JSP;
}
} else if (n instanceof Node.ForwardAction) {
if ("page".equals(name)) {
return TagInfo.BODY_CONTENT_JSP;
}
} else if (n instanceof Node.SetProperty) {
if ("value".equals(name)) {
return TagInfo.BODY_CONTENT_JSP;
}
} else if (n instanceof Node.UseBean) {
if ("beanName".equals(name)) {
return TagInfo.BODY_CONTENT_JSP;
}
} else if (n instanceof Node.PlugIn) {
if ("width".equals(name) || "height".equals(name)) {
return TagInfo.BODY_CONTENT_JSP;
}
} else if (n instanceof Node.ParamAction) {
if ("value".equals(name)) {
return TagInfo.BODY_CONTENT_JSP;
}
} else if (n instanceof Node.JspElement) {
return TagInfo.BODY_CONTENT_JSP;
}
return JAVAX_BODY_CONTENT_TEMPLATE_TEXT;
}
private void parseFileDirectives(Node parent) throws JasperException {
reader.skipUntil("<");
while (reader.hasMoreInput()) {
start = reader.mark();
if (reader.matches("%--")) {
// Comment
reader.skipUntil("--%>");
} else if (reader.matches("%@")) {
parseDirective(parent);
} else if (reader.matches("jsp:directive.")) {
parseXMLDirective(parent);
} else if (reader.matches("%!")) {
// Declaration
reader.skipUntil("%>");
} else if (reader.matches("%=")) {
// Expression
reader.skipUntil("%>");
} else if (reader.matches("%")) {
// Scriptlet
reader.skipUntil("%>");
}
reader.skipUntil("<");
}
}
}
