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/*
* Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
* Copyright 2004 The Apache Software Foundation
*
* 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 org.apache.jasper.compiler;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import javax.el.FunctionMapper;
import javax.servlet.jsp.tagext.FunctionInfo;
import javax.servlet.jsp.tagext.JspFragment;
import javax.servlet.jsp.tagext.PageData;
import javax.servlet.jsp.tagext.TagAttributeInfo;
import javax.servlet.jsp.tagext.TagData;
import javax.servlet.jsp.tagext.TagExtraInfo;
import javax.servlet.jsp.tagext.TagInfo;
import javax.servlet.jsp.tagext.TagLibraryInfo;
import javax.servlet.jsp.tagext.ValidationMessage;
import org.apache.jasper.Constants;
import org.apache.jasper.JasperException;
import org.apache.jasper.JspCompilationContext;
import org.apache.jasper.runtime.JspRuntimeLibrary;
import org.xml.sax.Attributes;
/**
* Performs validation on the page elements. Attributes are checked for
* mandatory presence, entry value validity, and consistency. As a
* side effect, some page global value (such as those from page directives)
* are stored, for later use.
*
* @author Kin-man Chung
* @author Jan Luehe
* @author Shawn Bayern
* @author Mark Roth
*/
class Validator {
/**
* A visitor to validate and extract page directive info
*/
static class DirectiveVisitor extends Node.Visitor {
private PageInfo pageInfo;
private ErrorDispatcher err;
private static final JspUtil.ValidAttribute[] pageDirectiveAttrs = {
new JspUtil.ValidAttribute("language"),
new JspUtil.ValidAttribute("extends"),
new JspUtil.ValidAttribute("import"),
new JspUtil.ValidAttribute("session"),
new JspUtil.ValidAttribute("buffer"),
new JspUtil.ValidAttribute("autoFlush"),
new JspUtil.ValidAttribute("isThreadSafe"),
new JspUtil.ValidAttribute("info"),
new JspUtil.ValidAttribute("errorPage"),
new JspUtil.ValidAttribute("isErrorPage"),
new JspUtil.ValidAttribute("contentType"),
new JspUtil.ValidAttribute("pageEncoding"),
new JspUtil.ValidAttribute("isELIgnored"),
new JspUtil.ValidAttribute("deferredSyntaxAllowedAsLiteral"),
new JspUtil.ValidAttribute("trimDirectiveWhitespaces")
};
private boolean pageEncodingSeen = false;
/*
* Constructor
*/
DirectiveVisitor(Compiler compiler) throws JasperException {
this.pageInfo = compiler.getPageInfo();
this.err = compiler.getErrorDispatcher();
}
public void visit(Node.IncludeDirective n) throws JasperException {
// Since pageDirectiveSeen flag only applies to the Current page
// save it here and restore it after the file is included.
boolean pageEncodingSeenSave = pageEncodingSeen;
pageEncodingSeen = false;
visitBody(n);
pageEncodingSeen = pageEncodingSeenSave;
}
public void visit(Node.PageDirective n) throws JasperException {
JspUtil.checkAttributes("Page directive", n,
pageDirectiveAttrs, err);
// JSP.2.10.1
Attributes attrs = n.getAttributes();
for (int i = 0; attrs != null && i < attrs.getLength(); i++) {
String attr = attrs.getQName(i);
String value = attrs.getValue(i);
if ("language".equals(attr)) {
if (pageInfo.getLanguage(false) == null) {
pageInfo.setLanguage(value, n, err, true);
} else if (!pageInfo.getLanguage(false).equals(value)) {
err.jspError(n, "jsp.error.page.conflict.language",
pageInfo.getLanguage(false), value);
}
} else if ("extends".equals(attr)) {
if (pageInfo.getExtends(false) == null) {
pageInfo.setExtends(value, n);
} else if (!pageInfo.getExtends(false).equals(value)) {
err.jspError(n, "jsp.error.page.conflict.extends",
pageInfo.getExtends(false), value);
}
} else if ("contentType".equals(attr)) {
if (pageInfo.getContentType() == null) {
pageInfo.setContentType(value);
} else if (!pageInfo.getContentType().equals(value)) {
err.jspError(n, "jsp.error.page.conflict.contenttype",
pageInfo.getContentType(), value);
}
} else if ("session".equals(attr)) {
if (pageInfo.getSession() == null) {
pageInfo.setSession(value, n, err);
} else if (!pageInfo.getSession().equals(value)) {
err.jspError(n, "jsp.error.page.conflict.session",
pageInfo.getSession(), value);
}
} else if ("buffer".equals(attr)) {
if (pageInfo.getBufferValue() == null) {
pageInfo.setBufferValue(value, n, err);
} else if (!pageInfo.getBufferValue().equals(value)) {
err.jspError(n, "jsp.error.page.conflict.buffer",
pageInfo.getBufferValue(), value);
}
} else if ("autoFlush".equals(attr)) {
if (pageInfo.getAutoFlush() == null) {
pageInfo.setAutoFlush(value, n, err);
} else if (!pageInfo.getAutoFlush().equals(value)) {
err.jspError(n, "jsp.error.page.conflict.autoflush",
pageInfo.getAutoFlush(), value);
}
} else if ("isThreadSafe".equals(attr)) {
if (pageInfo.getIsThreadSafe() == null) {
pageInfo.setIsThreadSafe(value, n, err);
} else if (!pageInfo.getIsThreadSafe().equals(value)) {
err.jspError(n, "jsp.error.page.conflict.isthreadsafe",
pageInfo.getIsThreadSafe(), value);
}
} else if ("isELIgnored".equals(attr)) {
if (pageInfo.getIsELIgnored() == null) {
pageInfo.setIsELIgnored(value, n, err, true);
} else if (!pageInfo.getIsELIgnored().equals(value)) {
err.jspError(n, "jsp.error.page.conflict.iselignored",
pageInfo.getIsELIgnored(), value);
}
} else if ("isErrorPage".equals(attr)) {
if (pageInfo.getIsErrorPage() == null) {
pageInfo.setIsErrorPage(value, n, err);
} else if (!pageInfo.getIsErrorPage().equals(value)) {
err.jspError(n, "jsp.error.page.conflict.iserrorpage",
pageInfo.getIsErrorPage(), value);
}
} else if ("errorPage".equals(attr)) {
if (pageInfo.getErrorPage() == null) {
pageInfo.setErrorPage(value);
} else if (!pageInfo.getErrorPage().equals(value)) {
err.jspError(n, "jsp.error.page.conflict.errorpage",
pageInfo.getErrorPage(), value);
}
} else if ("info".equals(attr)) {
if (pageInfo.getInfo() == null) {
pageInfo.setInfo(value);
} else if (!pageInfo.getInfo().equals(value)) {
err.jspError(n, "jsp.error.page.conflict.info",
pageInfo.getInfo(), value);
}
} else if ("pageEncoding".equals(attr)) {
if (pageEncodingSeen)
err.jspError(n, "jsp.error.page.multi.pageencoding");
// 'pageEncoding' can occur at most once per file
pageEncodingSeen = true;
/*
* Report any encoding conflict, treating "UTF-16",
* "UTF-16BE", and "UTF-16LE" as identical.
*/
comparePageEncodings(value, n);
} else if ("deferredSyntaxAllowedAsLiteral".equals(attr)) {
if (pageInfo.getDeferredSyntaxAllowedAsLiteral() == null) {
pageInfo.setDeferredSyntaxAllowedAsLiteral(value, n, err, true);
} else if (!pageInfo.getDeferredSyntaxAllowedAsLiteral().equals(value)) {
err.jspError(n, "jsp.error.page.conflict.deferred",
pageInfo.getDeferredSyntaxAllowedAsLiteral(), value);
}
} else if ("trimDirectiveWhitespaces".equals(attr)) {
if (pageInfo.getTrimDirectiveWhitespaces() == null) {
pageInfo.setTrimDirectiveWhitespaces(value, n, err, true);
} else if (!pageInfo.getTrimDirectiveWhitespaces().equals(value)) {
err.jspError(n, "jsp.error.page.conflict.trim",
pageInfo.getTrimDirectiveWhitespaces(), value);
}
}
}
// Check for bad combinations
if (pageInfo.getBuffer() == 0 && !pageInfo.isAutoFlush())
err.jspError(n, "jsp.error.page.badCombo");
// Error pages must not be self-referencing
if (pageInfo.isErrorPage() && pageInfo.getErrorPage() != null) {
String rootPath = pageInfo.getRootPath();
String errorPath = pageInfo.getErrorPage();
if (!errorPath.startsWith("/")) {
// Error page location is relative to root path
String baseRootPath =
rootPath.substring(0, rootPath.lastIndexOf('/'));
errorPath = baseRootPath + '/' + errorPath;
}
if (rootPath.equals(errorPath)) {
err.jspError(n, "jsp.error.page.selfreferencing",
rootPath);
}
}
// Attributes for imports for this node have been processed by
// the parsers, just add them to pageInfo.
pageInfo.addImports(n.getImports());
}
public void visit(Node.TagDirective n) throws JasperException {
// Note: Most of the validation is done in TagFileProcessor
// when it created a TagInfo object from the
// tag file in which the directive appeared.
// This method does additional processing to collect page info
Attributes attrs = n.getAttributes();
for (int i = 0; attrs != null && i < attrs.getLength(); i++) {
String attr = attrs.getQName(i);
String value = attrs.getValue(i);
if ("language".equals(attr)) {
if (pageInfo.getLanguage(false) == null) {
pageInfo.setLanguage(value, n, err, false);
} else if (!pageInfo.getLanguage(false).equals(value)) {
err.jspError(n, "jsp.error.tag.conflict.language",
pageInfo.getLanguage(false), value);
}
} else if ("isELIgnored".equals(attr)) {
if (pageInfo.getIsELIgnored() == null) {
pageInfo.setIsELIgnored(value, n, err, false);
} else if (!pageInfo.getIsELIgnored().equals(value)) {
err.jspError(n, "jsp.error.tag.conflict.iselignored",
pageInfo.getIsELIgnored(), value);
}
} else if ("pageEncoding".equals(attr)) {
if (pageEncodingSeen)
err.jspError(n, "jsp.error.tag.multi.pageencoding");
pageEncodingSeen = true;
// Make sure that if tag file is preceded by BOM, the
// BOM encoding matches the value of the pageEncoding
// attribute of the tag directive
if (n.getRoot().hasBom()) {
String bom = n.getRoot().getPageEncoding();
// Treat "UTF-16", "UTF-16BE", and "UTF-16LE" as
// identical.
if (value != null
&& !value.equalsIgnoreCase(bom)
&& (!value.toLowerCase().startsWith("utf-16")
|| !bom.toLowerCase().startsWith("utf-16"))) {
err.jspError(
n,
"jsp.error.bom_tagdir_encoding_mismatch",
bom, value);
}
}
n.getRoot().setPageEncoding(value);
} else if ("deferredSyntaxAllowedAsLiteral".equals(attr)) {
if (pageInfo.getDeferredSyntaxAllowedAsLiteral() == null) {
pageInfo.setDeferredSyntaxAllowedAsLiteral(value, n, err, false);
} else if (!pageInfo.getDeferredSyntaxAllowedAsLiteral().equals(value)) {
err.jspError(n, "jsp.error.tag.conflict.deferred",
pageInfo.getDeferredSyntaxAllowedAsLiteral(), value);
}
} else if ("trimDirectiveWhitespaces".equals(attr)) {
if (pageInfo.getTrimDirectiveWhitespaces() == null) {
pageInfo.setTrimDirectiveWhitespaces(value, n, err, false);
} else if (!pageInfo.getTrimDirectiveWhitespaces().equals(value)) {
err.jspError(n, "jsp.error.tag.conflict.trim",
pageInfo.getTrimDirectiveWhitespaces(), value);
}
}
}
// Attributes for imports for this node have been processed by
// the parsers, just add them to pageInfo.
pageInfo.addImports(n.getImports());
}
public void visit(Node.AttributeDirective n) throws JasperException {
// Do nothing, since this attribute directive has already been
// validated by TagFileProcessor when it created a TagInfo object
// from the tag file in which the directive appeared
}
public void visit(Node.VariableDirective n) throws JasperException {
// Do nothing, since this variable directive has already been
// validated by TagFileProcessor when it created a TagInfo object
// from the tag file in which the directive appeared
}
/*
* Ensures that the page encoding specified in the 'pageEncoding'
* attribute of the page directive matches the page encodings specified
* in other applicable authoritative page encoding sources.
*
* @param pageDirEnc The value of the pageEncoding attribute of the
* page directive
* @param pageDir The page directive node
*
* @throws JasperException if page encodings do not match
*/
private void comparePageEncodings(String pageDirEnc,
Node.PageDirective pageDir)
throws JasperException {
Node.Root root = pageDir.getRoot();
String configEnc = root.getJspConfigPageEncoding();
/*
* Compare the 'pageEncoding' attribute of the page directive with
* the encoding specified in the JSP config element whose URL
* pattern matches this page.
* Treat "UTF-16", "UTF-16BE", and "UTF-16LE" as identical.
*/
if (configEnc != null && !pageDirEnc.equalsIgnoreCase(configEnc)
&& (!pageDirEnc.toLowerCase().startsWith("utf-16")
|| !configEnc.toLowerCase().startsWith("utf-16"))) {
err.jspError(pageDir,
"jsp.error.config_pagedir_encoding_mismatch",
configEnc, pageDirEnc);
}
/*
* Compare the 'pageEncoding' attribute of the page directive with
* the encoding specified in the XML prolog (only for XML syntax,
* and only if JSP document contains XML prolog with encoding
* declaration).
* Treat "UTF-16", "UTF-16BE", and "UTF-16LE" as identical.
*/
if (root.isXmlSyntax() && root.isEncodingSpecifiedInProlog()) {
String pageEnc = root.getPageEncoding();
if (!pageDirEnc.equalsIgnoreCase(pageEnc)
&& (!pageDirEnc.toLowerCase().startsWith("utf-16")
|| !pageEnc.toLowerCase().startsWith("utf-16"))) {
err.jspError(pageDir,
"jsp.error.prolog_pagedir_encoding_mismatch",
pageEnc, pageDirEnc);
}
}
/*
* Compare the 'pageEncoding' attribute of the page directive with
* the encoding declared by BOM (if present).
* Treat "UTF-16", "UTF-16BE", and "UTF-16LE" as identical.
*/
if (root.hasBom()) {
String pageEnc = root.getPageEncoding();
if (!pageDirEnc.equalsIgnoreCase(pageEnc)
&& (!pageDirEnc.toLowerCase().startsWith("utf-16")
|| !pageEnc.toLowerCase().startsWith("utf-16"))) {
err.jspError(pageDir,
"jsp.error.bom_pagedir_encoding_mismatch",
pageEnc, pageDirEnc);
}
}
}
}
/**
* A visitor for validating nodes other than page directives
*/
static class ValidateVisitor extends Node.Visitor {
private PageInfo pageInfo;
private ErrorDispatcher err;
private ClassLoader loader;
private JspCompilationContext ctxt;
private static final JspUtil.ValidAttribute[] jspRootAttrs = {
new JspUtil.ValidAttribute("xsi:schemaLocation"),
new JspUtil.ValidAttribute("version", true) };
private static final JspUtil.ValidAttribute[] includeDirectiveAttrs = {
new JspUtil.ValidAttribute("file", true) };
private static final JspUtil.ValidAttribute[] taglibDirectiveAttrs = {
new JspUtil.ValidAttribute("uri"),
new JspUtil.ValidAttribute("tagdir"),
new JspUtil.ValidAttribute("prefix", true) };
private static final JspUtil.ValidAttribute[] includeActionAttrs = {
new JspUtil.ValidAttribute("page", true),
new JspUtil.ValidAttribute("flush") };
private static final JspUtil.ValidAttribute[] paramActionAttrs = {
new JspUtil.ValidAttribute("name", true),
new JspUtil.ValidAttribute("value", true) };
private static final JspUtil.ValidAttribute[] forwardActionAttrs = {
new JspUtil.ValidAttribute("page", true) };
private static final JspUtil.ValidAttribute[] getPropertyAttrs = {
new JspUtil.ValidAttribute("name", true),
new JspUtil.ValidAttribute("property", true) };
private static final JspUtil.ValidAttribute[] setPropertyAttrs = {
new JspUtil.ValidAttribute("name", true),
new JspUtil.ValidAttribute("property", true),
new JspUtil.ValidAttribute("value", false),
new JspUtil.ValidAttribute("param") };
private static final JspUtil.ValidAttribute[] useBeanAttrs = {
new JspUtil.ValidAttribute("id", true),
new JspUtil.ValidAttribute("scope"),
new JspUtil.ValidAttribute("class"),
new JspUtil.ValidAttribute("type"),
new JspUtil.ValidAttribute("beanName", false) };
private static final JspUtil.ValidAttribute[] plugInAttrs = {
new JspUtil.ValidAttribute("type",true),
new JspUtil.ValidAttribute("code", true),
new JspUtil.ValidAttribute("codebase"),
new JspUtil.ValidAttribute("align"),
new JspUtil.ValidAttribute("archive"),
new JspUtil.ValidAttribute("height", false),
new JspUtil.ValidAttribute("hspace"),
new JspUtil.ValidAttribute("jreversion"),
new JspUtil.ValidAttribute("name"),
new JspUtil.ValidAttribute("vspace"),
new JspUtil.ValidAttribute("width", false),
new JspUtil.ValidAttribute("nspluginurl"),
new JspUtil.ValidAttribute("iepluginurl") };
private static final JspUtil.ValidAttribute[] attributeAttrs = {
new JspUtil.ValidAttribute("name", true),
new JspUtil.ValidAttribute("trim"),
new JspUtil.ValidAttribute("omit")};
private static final JspUtil.ValidAttribute[] invokeAttrs = {
new JspUtil.ValidAttribute("fragment", true),
new JspUtil.ValidAttribute("var"),
new JspUtil.ValidAttribute("varReader"),
new JspUtil.ValidAttribute("scope") };
private static final JspUtil.ValidAttribute[] doBodyAttrs = {
new JspUtil.ValidAttribute("var"),
new JspUtil.ValidAttribute("varReader"),
new JspUtil.ValidAttribute("scope") };
private static final JspUtil.ValidAttribute[] jspOutputAttrs = {
new JspUtil.ValidAttribute("omit-xml-declaration"),
new JspUtil.ValidAttribute("doctype-root-element"),
new JspUtil.ValidAttribute("doctype-public"),
new JspUtil.ValidAttribute("doctype-system") };
/*
* Constructor
*/
ValidateVisitor(Compiler compiler) {
this.pageInfo = compiler.getPageInfo();
this.err = compiler.getErrorDispatcher();
this.ctxt = compiler.getCompilationContext();
this.loader = ctxt.getClassLoader();
}
public void visit(Node.JspRoot n) throws JasperException {
JspUtil.checkAttributes("Jsp:root", n,
jspRootAttrs, err);
String version = n.getTextAttribute("version");
if (!version.equals("1.2") && !version.equals("2.0") && !version.equals("2.1")) {
err.jspError(n, "jsp.error.jsproot.version.invalid", version);
}
visitBody(n);
}
public void visit(Node.IncludeDirective n) throws JasperException {
JspUtil.checkAttributes("Include directive", n,
includeDirectiveAttrs, err);
visitBody(n);
}
public void visit(Node.TaglibDirective n) throws JasperException {
JspUtil.checkAttributes("Taglib directive", n,
taglibDirectiveAttrs, err);
// Either 'uri' or 'tagdir' attribute must be specified
String uri = n.getAttributeValue("uri");
String tagdir = n.getAttributeValue("tagdir");
if (uri == null && tagdir == null) {
err.jspError(n, "jsp.error.taglibDirective.missing.location");
}
if (uri != null && tagdir != null) {
err.jspError(n, "jsp.error.taglibDirective.both_uri_and_tagdir");
}
}
public void visit(Node.ParamAction n) throws JasperException {
JspUtil.checkAttributes("Param action", n,
paramActionAttrs, err);
// make sure the value of the 'name' attribute is not a
// request-time expression
throwErrorIfExpression(n, "name", "jsp:param");
n.setValue(getJspAttribute("value", null, null,
n.getAttributeValue("value"),
n, false, null));
visitBody(n);
}
public void visit(Node.ParamsAction n) throws JasperException {
// Make sure we've got at least one nested jsp:param
Node.Nodes subElems = n.getBody();
if (subElems == null) {
err.jspError(n, "jsp.error.params.emptyBody");
}
visitBody(n);
}
public void visit(Node.IncludeAction n) throws JasperException {
JspUtil.checkAttributes("Include action", n,
includeActionAttrs, err);
n.setPage(getJspAttribute("page", null, null,
n.getAttributeValue("page"),
n, false, null));
visitBody(n);
};
public void visit(Node.ForwardAction n) throws JasperException {
JspUtil.checkAttributes("Forward", n,
forwardActionAttrs, err);
n.setPage(getJspAttribute("page", null, null,
n.getAttributeValue("page"),
n, false, null));
visitBody(n);
}
public void visit(Node.GetProperty n) throws JasperException {
JspUtil.checkAttributes("GetProperty", n,
getPropertyAttrs, err);
}
public void visit(Node.SetProperty n) throws JasperException {
JspUtil.checkAttributes("SetProperty", n,
setPropertyAttrs, err);
String property = n.getTextAttribute("property");
String param = n.getTextAttribute("param");
String value = n.getAttributeValue("value");
n.setValue(getJspAttribute("value", null, null, value,
n, false, null));
boolean valueSpecified = n.getValue() != null;
if ("*".equals(property)) {
if (param != null || valueSpecified)
err.jspError(n, "jsp.error.setProperty.invalid");
} else if (param != null && valueSpecified) {
err.jspError(n, "jsp.error.setProperty.invalid");
}
visitBody(n);
}
public void visit(Node.UseBean n) throws JasperException {
JspUtil.checkAttributes("UseBean", n,
useBeanAttrs, err);
String name = n.getTextAttribute ("id");
String scope = n.getTextAttribute ("scope");
JspUtil.checkScope(scope, n, err);
String className = n.getTextAttribute ("class");
String type = n.getTextAttribute ("type");
BeanRepository beanInfo = pageInfo.getBeanRepository();
if (className == null && type == null)
err.jspError(n, "jsp.error.usebean.missingType");
if (beanInfo.checkVariable(name))
err.jspError(n, "jsp.error.usebean.duplicate", name);
if ("session".equals(scope) && !pageInfo.isSession())
err.jspError(n, "jsp.error.usebean.noSession");
Node.JspAttribute jattr
= getJspAttribute("beanName", null, null,
n.getAttributeValue("beanName"),
n, false, null);
n.setBeanName(jattr);
if (className != null && jattr != null)
err.jspError(n, "jsp.error.usebean.notBoth");
if (className == null)
className = type;
beanInfo.addBean(n, name, className, scope);
visitBody(n);
}
public void visit(Node.PlugIn n) throws JasperException {
JspUtil.checkAttributes("Plugin", n, plugInAttrs, err);
throwErrorIfExpression(n, "type", "jsp:plugin");
throwErrorIfExpression(n, "code", "jsp:plugin");
throwErrorIfExpression(n, "codebase", "jsp:plugin");
throwErrorIfExpression(n, "align", "jsp:plugin");
throwErrorIfExpression(n, "archive", "jsp:plugin");
throwErrorIfExpression(n, "hspace", "jsp:plugin");
throwErrorIfExpression(n, "jreversion", "jsp:plugin");
throwErrorIfExpression(n, "name", "jsp:plugin");
throwErrorIfExpression(n, "vspace", "jsp:plugin");
throwErrorIfExpression(n, "nspluginurl", "jsp:plugin");
throwErrorIfExpression(n, "iepluginurl", "jsp:plugin");
String type = n.getTextAttribute("type");
if (type == null)
err.jspError(n, "jsp.error.plugin.notype");
if (!type.equals("bean") && !type.equals("applet"))
err.jspError(n, "jsp.error.plugin.badtype");
if (n.getTextAttribute("code") == null)
err.jspError(n, "jsp.error.plugin.nocode");
Node.JspAttribute width
= getJspAttribute("width", null, null,
n.getAttributeValue("width"),
n, false, null);
n.setWidth( width );
Node.JspAttribute height
= getJspAttribute("height", null, null,
n.getAttributeValue("height"),
n, false, null);
n.setHeight( height );
visitBody(n);
}
public void visit(Node.NamedAttribute n) throws JasperException {
JspUtil.checkAttributes("Attribute", n,
attributeAttrs, err);
String omit = n.getAttributeValue("omit");
if (omit != null) {
n.setOmit(getJspAttribute("omit", null, null, omit,
n, false, null));
}
visitBody(n);
}
public void visit(Node.JspBody n) throws JasperException {
visitBody(n);
}
public void visit(Node.Declaration n) throws JasperException {
if (pageInfo.isScriptingInvalid()) {
err.jspError(n.getStart(), "jsp.error.no.scriptlets");
}
}
public void visit(Node.Expression n) throws JasperException {
if (pageInfo.isScriptingInvalid()) {
err.jspError(n.getStart(), "jsp.error.no.scriptlets");
}
}
public void visit(Node.Scriptlet n) throws JasperException {
if (pageInfo.isScriptingInvalid()) {
err.jspError(n.getStart(), "jsp.error.no.scriptlets");
}
}
public void visit(Node.ELExpression n) throws JasperException {
if (pageInfo.isELIgnored()) {
return;
}
String expressions = n.getText();
if (expressions.charAt(0) == '#') {
if (pageInfo.isDeferredSyntaxAllowedAsLiteral()) {
return;
}
// For tag files, if the Jsp version for tag library is 2.0 or
// less, #{} is not an error
if (ctxt.isTagFile()) {
String versionString =
ctxt.getTagInfo().getTagLibrary().getRequiredVersion();
Double version = Double.valueOf(versionString).doubleValue();
if (version < 2.1) {
return;
}
}
err.jspError(n.getStart(), "jsp.error.not.in.template",
"#{...}");
}
ELNode.Nodes el = ELParser.parse(expressions);
validateFunctions(el, n);
JspUtil.validateExpressions(
n.getStart(),
expressions,
getFunctionMapper(el),
err);
n.setEL(el);
}
public void visit(Node.UninterpretedTag n) throws JasperException {
if (n.getNamedAttributeNodes().size() != 0) {
err.jspError(n, "jsp.error.namedAttribute.invalidUse");
}
Attributes attrs = n.getAttributes();
if (attrs != null) {
int attrSize = attrs.getLength();
Node.JspAttribute[] jspAttrs = new Node.JspAttribute[attrSize];
for (int i=0; i < attrSize; i++) {
jspAttrs[i] = getJspAttribute(attrs.getQName(i),
attrs.getURI(i),
attrs.getLocalName(i),
attrs.getValue(i),
n,
false, null);
}
n.setJspAttributes(jspAttrs);
}
visitBody(n);
}
public void visit(Node.CustomTag n) throws JasperException {
TagInfo tagInfo = n.getTagInfo();
if (tagInfo == null) {
err.jspError(n, "jsp.error.missing.tagInfo", n.getQName());
}
/*
* The bodycontent of a SimpleTag cannot be JSP.
*/
if (n.implementsSimpleTag() &&
tagInfo.getBodyContent().equals(TagInfo.BODY_CONTENT_JSP)) {
err.jspError(n, "jsp.error.simpletag.badbodycontent",
tagInfo.getTagClassName());
}
/*
* If the tag handler declares in the TLD that it supports dynamic
* attributes, it also must implement the DynamicAttributes
* interface.
*/
if (tagInfo.hasDynamicAttributes()
&& !n.implementsDynamicAttributes()) {
err.jspError(n, "jsp.error.dynamic.attributes.not.implemented",
n.getQName());
}
/*
* Make sure all required attributes are present, either as
* attributes or named attributes ().
* Also make sure that the same attribute is not specified in
* both attributes or named attributes.
*/
TagAttributeInfo[] tldAttrs = tagInfo.getAttributes();
String customActionUri = n.getURI();
Attributes attrs = n.getAttributes();
int attrsSize = (attrs == null) ? 0 : attrs.getLength();
for (int i=0; i 0) {
jspAttrs = new Node.JspAttribute[jspAttrsSize];
}
Hashtable tagDataAttrs =
new Hashtable(attrsSize);
checkXmlAttributes(n, jspAttrs, tagDataAttrs);
checkNamedAttributes(n, jspAttrs, attrsSize, tagDataAttrs);
TagData tagData = new TagData(tagDataAttrs);
// JSP.C1: It is a (translation time) error for an action that
// has one or more variable subelements to have a TagExtraInfo
// class that returns a non-null object.
TagExtraInfo tei = tagInfo.getTagExtraInfo();
if (tei != null
&& tei.getVariableInfo(tagData) != null
&& tei.getVariableInfo(tagData).length > 0
&& tagInfo.getTagVariableInfos().length > 0) {
err.jspError("jsp.error.non_null_tei_and_var_subelems",
n.getQName());
}
n.setTagData(tagData);
n.setJspAttributes(jspAttrs);
visitBody(n);
}
public void visit(Node.JspElement n) throws JasperException {
Attributes attrs = n.getAttributes();
if (attrs == null) {
err.jspError(n, "jsp.error.jspelement.missing.name");
}
int xmlAttrLen = attrs.getLength();
Node.Nodes namedAttrs = n.getNamedAttributeNodes();
// XML-style 'name' attribute, which is mandatory, must not be
// included in JspAttribute array
int jspAttrSize = xmlAttrLen-1 + namedAttrs.size();
Node.JspAttribute[] jspAttrs = new Node.JspAttribute[jspAttrSize];
int jspAttrIndex = 0;
// Process XML-style attributes
for (int i=0; i, the action
*
* "test" and its attributes "a", "b", and "c" all belong to the
* namespace identified by the prefix "my". The above invocation would
* be equivalent to:
*
*
*
* An action attribute may have a prefix different from that of the
* action invocation only if the underlying tag handler supports
* dynamic attributes, in which case the attribute with the different
* prefix is considered a dynamic attribute.
*/
private void checkXmlAttributes(Node.CustomTag n,
Node.JspAttribute[] jspAttrs,
Hashtable tagDataAttrs)
throws JasperException {
TagInfo tagInfo = n.getTagInfo();
if (tagInfo == null) {
err.jspError(n, "jsp.error.missing.tagInfo", n.getQName());
}
TagAttributeInfo[] tldAttrs = tagInfo.getAttributes();
Attributes attrs = n.getAttributes();
for (int i=0; attrs != null && i= 2.1 &&
!isLiteral){
err.jspError(n,
"jsp.error.el.nondeferred.pound",
tldAttrs[j].getName());
} else {
isLiteral = true;
}
}
if (isLiteral) {
// #{} needs to be escaped before
// sending it to EL interpreter
jspAttrs[i].setValue(escapePound(
jspAttrs[i].getValue()));
}
} else if (pageInfo.isDeferredSyntaxAllowedAsLiteral()){
// The literal is of the form \#{}
jspAttrs[i].setValue(escapePound(
jspAttrs[i].getValue()));
}
}
} else {
// Attribute does not accept any expressions.
// Make sure its value does not contain any.
String litAttr = getLiteral(n, attrs.getValue(i));
if (litAttr == null) {
err.jspError(n,
"jsp.error.attribute.custom.non_rt_with_expr",
tldAttrs[j].getName());
}
jspAttrs[i]
= new Node.JspAttribute(attrs.getQName(i),
attrs.getURI(i),
attrs.getLocalName(i),
litAttr,
false,
null,
false);
}
if (jspAttrs[i].isExpression()) {
tagDataAttrs.put(attrs.getQName(i),
TagData.REQUEST_TIME_VALUE);
} else {
tagDataAttrs.put(attrs.getQName(i),
attrs.getValue(i));
}
found = true;
break;
}
}
if (!found) {
if (tagInfo.hasDynamicAttributes()) {
jspAttrs[i] = getJspAttribute(attrs.getQName(i),
attrs.getURI(i),
attrs.getLocalName(i),
attrs.getValue(i),
n,
true, null);
} else {
err.jspError(n, "jsp.error.bad_attribute",
attrs.getQName(i), n.getLocalName());
}
}
}
}
/*
* Make sure the given custom action does not have any invalid named
* attributes
*/
private void checkNamedAttributes(Node.CustomTag n,
Node.JspAttribute[] jspAttrs,
int start,
Hashtable tagDataAttrs)
throws JasperException {
TagInfo tagInfo = n.getTagInfo();
if (tagInfo == null) {
err.jspError(n, "jsp.error.missing.tagInfo", n.getQName());
}
TagAttributeInfo[] tldAttrs = tagInfo.getAttributes();
Node.Nodes naNodes = n.getNamedAttributeNodes();
for (int i=0; i
* If value is null, checks if there are any
* NamedAttribute subelements in the tree node, and if so,
* constructs a JspAttribute out of a child NamedAttribute node.
*/
private Node.JspAttribute getJspAttribute(String qName,
String uri,
String localName,
String value,
Node n,
boolean dynamic,
TagAttributeInfo tagAttr)
throws JasperException {
Node.JspAttribute result = null;
// XXX Is it an error to see "%=foo%" in non-Xml page?
// (We won't see "<%=foo%> in xml page because '<' is not a
// valid attribute value in xml).
if (value != null) {
if (n.getRoot().isXmlSyntax() && value.startsWith("%=")) {
result = new Node.JspAttribute(
qName,
uri,
localName,
value.substring(2, value.length()-1),
true,
null,
dynamic);
}
else if(!n.getRoot().isXmlSyntax() && value.startsWith("<%=")) {
result = new Node.JspAttribute(
qName,
uri,
localName,
value.substring(3, value.length()-2),
true,
null,
dynamic);
}
else {
// The attribute can contain expressions but is not a
// scriptlet expression; thus, we want to run it through
// the expression interpreter
// validate expression syntax if string contains
// expression(s)
ELNode.Nodes el = ELParser.parse(value);
if (el.hasPoundExpression() && tagAttr == null && !dynamic){
// Action attributes cannot have #{...}, unless
// explicitly allowed
if (pageInfo.isELIgnored() ||
pageInfo.isDeferredSyntaxAllowedAsLiteral()) {
result = new Node.JspAttribute(qName, uri, localName,
getLiteral(n, value),
false, null, false);
}
else {
err.jspError(n, "jsp.error.el.action.pound");
}
}
else if ((el.containsEL() && !pageInfo.isELIgnored())
|| ((tagAttr !=null)
&& (( tagAttr.isDeferredValue()
&& !tagAttr.canBeRequestTime())
|| tagAttr.isDeferredMethod()
)
)
) {
validateFunctions(el, n);
JspUtil.validateExpressions(
n.getStart(),
value,
getFunctionMapper(el),
this.err);
if (tagAttr != null && tagAttr.isDeferredValue()) {
String expectedType =
tagAttr.getExpectedTypeName();
result = new Node.JspAttribute(
qName, uri, localName,
value, el,
expectedType,
null, null);
}
else if (tagAttr != null && tagAttr.isDeferredMethod()){
String methodSignature =
tagAttr.getMethodSignature();
String returnType = getReturnType(methodSignature);
// It is an error to specify a string literal
// as a value for MethodExpression if the literal
// cannot be coerced to the return type
if (!el.containsEL()) {
try {
Class typeClass =
JspUtil.toClass(returnType, loader);
JspUtil.coerce(typeClass, value);
} catch (ClassNotFoundException ex) {
err.jspError(n, "jsp.error.el.method.type",
qName, returnType);
} catch (Exception ex) {
err.jspError(n,
"jsp.error.el.method.literal", qName);
}
}
result = new Node.JspAttribute(
qName, uri, localName,
value, el,
null,
getReturnType(methodSignature),
getParameters(methodSignature));
}
else {
result = new Node.JspAttribute(
qName, uri, localName,
value, false, el, dynamic);
}
} else {
result = new Node.JspAttribute(qName, uri, localName,
getLiteral(n, value),
false, null, dynamic);
}
}
}
else {
// Value is null. Check for any NamedAttribute subnodes
// that might contain the value for this attribute.
// Otherwise, the attribute wasn't found so we return null.
Node.NamedAttribute namedAttributeNode =
n.getNamedAttributeNode( qName );
if( namedAttributeNode != null ) {
result = new Node.JspAttribute(namedAttributeNode,
dynamic);
}
}
return result;
}
/*
* Checks to see if the given attribute value represents a string
* or an expression (runtime or EL). If it is a literal, also process
* escape sequences as a side-effect. Note that the treatment of the
* EL syntax "#{}" depends on the JSP version in the TLD.
*
*
* @return null, if the attribute is an expression
* otherwise, the literal string for the attribute
*/
private String getLiteral(Node n, String value) {
if (n.getRoot().isXmlSyntax() && value.startsWith("%=")) {
return null;
}
if (!n.getRoot().isXmlSyntax() && value.startsWith("<%=")) {
return null;
}
if (pageInfo.isELIgnored()) {
return value;
}
boolean poundExpressionIgnored = (n instanceof Node.CustomTag) &&
((((Node.CustomTag)n).getJspVersion() < 2.1) ||
pageInfo.isDeferredSyntaxAllowedAsLiteral());
int size = value.length();
StringBuilder buf = new StringBuilder(size);
char p = ' ';
for (int i = 0; i < size; i++) {
char c = value.charAt(i);
if (p == '$' && c == '{') {
return null;
}
if (p == '#' && c == '{' && !poundExpressionIgnored) {
return null;
}
if (p == '\\') {
if (c == '\\' || c == '$' ||
(c == '#' && !poundExpressionIgnored)) {
// If "#{..}" is not recognized as an El expression,
// then "\#" is not an escape sequence.
buf.append(c);
p = ' ';
} else {
buf.append(p).append(c);
p = c;
}
} else {
p = c;
if (p != '\\') {
buf.append(c);
}
}
}
return buf.toString();
}
/*
* Throws exception if the value of the attribute with the given
* name in the given node is given as an RT or EL expression, but the
* spec requires a static value.
*/
private void throwErrorIfExpression(Node n, String attrName,
String actionName)
throws JasperException {
if (n.getAttributes() != null
&& n.getAttributes().getValue(attrName) != null
&& getLiteral(n, n.getAttributes().getValue(attrName))==null) {
err.jspError(n,
"jsp.error.attribute.standard.non_rt_with_expr",
attrName, actionName);
}
}
/*
* Since the EL engine reconginizes escape sequence for #{ }, literals
* sent to it must be properly escaped, so "#{}" becomes "\#{}", and
* "\#{}" becomes "\\\#{}" etc.
*/
private String escapePound(String value) {
if (value.indexOf("#{") < 0) {
return value;
}
StringBuilder buf = new StringBuilder(value.length() + 2);
for (int i = 0; i < value.length(); i++) {
if (value.charAt(i) == '#') {
if (((i+1) < value.length()) && (value.charAt(i+1) == '{')){
if (((i-1) >= 0) && (value.charAt(i-1) == '\\')) {
buf.append('\\');
}
buf.append('\\');
}
}
buf.append(value.charAt(i));
}
return buf.toString();
}
private static class NamedAttributeVisitor extends Node.Visitor {
private boolean hasDynamicContent;
public void doVisit(Node n) throws JasperException {
if (!(n instanceof Node.JspText)
&& !(n instanceof Node.TemplateText)) {
hasDynamicContent = true;
}
visitBody(n);
}
public boolean hasDynamicContent() {
return hasDynamicContent;
}
}
private String findUri(String prefix, Node n) {
for (Node p = n; p != null; p = p.getParent()) {
Attributes attrs = p.getTaglibAttributes();
if (attrs == null) {
continue;
}
for (int i = 0; i < attrs.getLength(); i++) {
String name = attrs.getQName(i);
int k = name.indexOf(':');
if (prefix == null && k < 0) {
// prefix not specified and a default ns found
return attrs.getValue(i);
}
if (prefix != null && k >= 0 &&
prefix.equals(name.substring(k+1))) {
return attrs.getValue(i);
}
}
}
return null;
}
/**
* Validate functions in EL expressions
*/
private void validateFunctions(ELNode.Nodes el, Node n)
throws JasperException {
class FVVisitor extends ELNode.Visitor {
Node n;
FVVisitor(Node n) {
this.n = n;
}
public void visit(ELNode.Function func) throws JasperException {
String prefix = func.getPrefix();
String function = func.getName();
String uri = null;
if (n.getRoot().isXmlSyntax()) {
uri = findUri(prefix, n);
} else if (prefix != null) {
uri = pageInfo.getURI(prefix);
}
if (uri == null) {
if (prefix == null) {
// in EL 3.0, this can be a lambda expression call.
return;
/*
err.jspError(n, "jsp.error.noFunctionPrefix",
function);
*/
}
else {
err.jspError(n,
"jsp.error.attribute.invalidPrefix", prefix);
}
}
TagLibraryInfo taglib = pageInfo.getTaglib(uri);
FunctionInfo funcInfo = null;
if (taglib != null) {
funcInfo = taglib.getFunction(function);
}
if (funcInfo == null) {
err.jspError(n, "jsp.error.noFunction", function);
}
// Skip TLD function uniqueness check. Done by Schema ?
func.setUri(uri);
func.setFunctionInfo(funcInfo);
processSignature(func);
}
}
el.visit(new FVVisitor(n));
}
private void processSignature(ELNode.Function func)
throws JasperException {
FunctionInfo funcInfo = func.getFunctionInfo();
String signature = funcInfo.getFunctionSignature();
func.setMethodName(getMethod(signature));
func.setParameters(getParameters(signature));
}
/**
* Get the return type from the signature.
*/
private String getReturnType(String signature)
throws JasperException {
int start = signature.indexOf(' ');
if (start < 0) {
err.jspError("jsp.error.tld.invalid.signature", signature);
}
return signature.substring(0, start);
}
/**
* Get the method name from the signature.
*/
private String getMethod(String signature)
throws JasperException {
int start = signature.indexOf(' ');
if (start < 0) {
err.jspError("jsp.error.tld.invalid.signature", signature);
}
int end = signature.indexOf('(');
if (end < 0) {
err.jspError("jsp.error.tld.invalid.signature", signature);
}
return signature.substring(start+1, end).trim();
}
/**
* Get the parameters types from the function signature.
* @return An array of parameter class names
*/
private String[] getParameters(String signature)
throws JasperException {
ArrayList params = new ArrayList();
// Signature is of the form
// S ( ',' )* )? ')'
int start = signature.indexOf('(') + 1;
boolean lastArg = false;
while (true) {
int p = signature.indexOf(',', start);
if (p < 0) {
p = signature.indexOf(')', start);
if (p < 0) {
err.jspError("jsp.error.tld.invalid.signature", signature);
}
lastArg = true;
}
String arg = signature.substring(start, p).trim();
if (!"".equals(arg)) {
params.add(arg);
}
if (lastArg) {
break;
}
start = p+1;
}
return params.toArray(new String[params.size()]);
}
private FunctionMapper getFunctionMapper(ELNode.Nodes el)
throws JasperException {
class ValidateFunctionMapper extends FunctionMapper {
private HashMap fnmap =
new HashMap();
public void mapFunction(String fnQName, Method method) {
fnmap.put(fnQName, method);
}
public Method resolveFunction(String prefix,
String localName) {
return (Method) this.fnmap.get(prefix + ":" + localName);
}
}
class MapperELVisitor extends ELNode.Visitor {
ValidateFunctionMapper fmapper;
MapperELVisitor(ValidateFunctionMapper fmapper) {
this.fmapper = fmapper;
}
public void visit(ELNode.Function n) throws JasperException {
if (n.getUri() == null) {
// Can be a lambda expression call
return;
}
Class c = null;
Method method = null;
try {
c = loader.loadClass(
n.getFunctionInfo().getFunctionClass());
} catch (ClassNotFoundException e) {
err.jspError("jsp.error.function.classnotfound",
n.getFunctionInfo().getFunctionClass(),
n.getPrefix() + ':' + n.getName(),
e.getMessage());
}
String paramTypes[] = n.getParameters();
int size = paramTypes.length;
Class params[] = new Class[size];
int i = 0;
try {
for (i = 0; i < size; i++) {
params[i] = JspUtil.toClass(paramTypes[i], loader);
}
method = c.getDeclaredMethod(n.getMethodName(),
params);
} catch (ClassNotFoundException e) {
err.jspError("jsp.error.signature.classnotfound",
paramTypes[i],
n.getPrefix() + ':' + n.getName(),
e.getMessage());
} catch (NoSuchMethodException e ) {
err.jspError("jsp.error.noFunctionMethod",
n.getMethodName(), n.getName(),
c.getName());
}
// Make sure that this method is public
if (! Modifier.isPublic(method.getModifiers())) {
err.jspError("jsp.error.nonPublicFunction",
c.getName() + '.' + method.getName());
}
// Make sure that this method is static
if (! Modifier.isStatic(method.getModifiers())) {
err.jspError("jsp.error.nonStaticFunction",
c.getName() + '.' + method.getName());
}
fmapper.mapFunction(n.getPrefix() + ':' + n.getName(),
method);
}
}
ValidateFunctionMapper fmapper = new ValidateFunctionMapper();
el.visit(new MapperELVisitor(fmapper));
return fmapper;
}
} // End of ValidateVisitor
/**
* A visitor for validating TagExtraInfo classes of all tags
*/
static class TagExtraInfoVisitor extends Node.Visitor {
private ErrorDispatcher err;
/*
* Constructor
*/
TagExtraInfoVisitor(Compiler compiler) {
this.err = compiler.getErrorDispatcher();
}
public void visit(Node.CustomTag n) throws JasperException {
TagInfo tagInfo = n.getTagInfo();
if (tagInfo == null) {
err.jspError(n, "jsp.error.missing.tagInfo", n.getQName());
}
ValidationMessage[] errors = tagInfo.validate(n.getTagData());
if (errors != null && errors.length != 0) {
StringBuilder errMsg = new StringBuilder();
errMsg.append("
