org.apache.jasper.servlet.JspCServletContext Maven / Gradle / Ivy
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package org.apache.jasper.servlet;
import java.io.File;
import java.io.InputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Enumeration;
import java.util.EventListener;
import java.util.HashSet;
import java.util.Hashtable;
import java.util.Map;
import java.util.Set;
import java.util.Vector;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.net.URL;
import javax.servlet.RequestDispatcher;
import javax.servlet.Servlet;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;
import javax.servlet.FilterRegistration;
import javax.servlet.Filter;
import javax.servlet.SessionCookieConfig;
import javax.servlet.SessionTrackingMode;
import javax.servlet.descriptor.JspConfigDescriptor;
import javax.servlet.descriptor.TaglibDescriptor;
import javax.servlet.descriptor.JspPropertyGroupDescriptor;
import org.apache.jasper.JasperException;
import org.apache.jasper.xmlparser.TreeNode;
import org.apache.jasper.xmlparser.ParserUtils;
/**
* Simple ServletContext implementation without
* HTTP-specific methods.
*
* @author Peter Rossbach ([email protected])
*/
public class JspCServletContext implements ServletContext {
// ----------------------------------------------------- Instance Variables
/**
* Servlet context attributes.
*/
protected Hashtable myAttributes;
/**
* The log writer we will write log messages to.
*/
protected PrintWriter myLogWriter;
/**
* The base URL (document root) for this context.
*/
protected URL myResourceBaseURL;
private JspConfigDescriptor jspConfigDescriptor;
// ----------------------------------------------------------- Constructors
/**
* Create a new instance of this ServletContext implementation.
*
* @param aLogWriter PrintWriter which is used for log() calls
* @param aResourceBaseURL Resource base URL
*/
public JspCServletContext(PrintWriter aLogWriter, URL aResourceBaseURL) {
myAttributes = new Hashtable();
myLogWriter = aLogWriter;
myResourceBaseURL = aResourceBaseURL;
parseWebDotXml();
}
// --------------------------------------------------------- Public Methods
/**
* Return the specified context attribute, if any.
*
* @param name Name of the requested attribute
*/
public Object getAttribute(String name) {
return (myAttributes.get(name));
}
/**
* Return an enumeration of context attribute names.
*/
public Enumeration getAttributeNames() {
return (myAttributes.keys());
}
/**
* Returns the context path of the web application.
*/
public String getContextPath() {
return null;
}
/**
* Return the servlet context for the specified path.
*
* @param uripath Server-relative path starting with '/'
*/
public ServletContext getContext(String uripath) {
return (null);
}
/**
* Return the specified context initialization parameter.
*
* @param name Name of the requested parameter
*/
public String getInitParameter(String name) {
return (null);
}
/**
* Return an enumeration of the names of context initialization
* parameters.
*/
public Enumeration getInitParameterNames() {
return (new Vector().elements());
}
/**
* Return the Servlet API major version number.
*/
public int getMajorVersion() {
return 3;
}
/**
* Return the MIME type for the specified filename.
*
* @param file Filename whose MIME type is requested
*/
public String getMimeType(String file) {
return (null);
}
/**
* Return the Servlet API minor version number.
*/
public int getMinorVersion() {
return 0;
}
public int getEffectiveMajorVersion() {
// TODO: get it from web.xml
return 3;
}
public int getEffectiveMinorVersion() {
// TODO: get it from web.xml
return 0;
}
/**
* Return a request dispatcher for the specified servlet name.
*
* @param name Name of the requested servlet
*/
public RequestDispatcher getNamedDispatcher(String name) {
return (null);
}
/**
* Return the real path for the specified context-relative
* virtual path.
*
* @param path The context-relative virtual path to resolve
*/
public String getRealPath(String path) {
if (!myResourceBaseURL.getProtocol().equals("file"))
return (null);
if (!path.startsWith("/"))
return (null);
try {
return
(getResource(path).getFile().replace('/', File.separatorChar));
} catch (Throwable t) {
return (null);
}
}
/**
* Return a request dispatcher for the specified context-relative path.
*
* @param path Context-relative path for which to acquire a dispatcher
*/
public RequestDispatcher getRequestDispatcher(String path) {
return (null);
}
/**
* Return a URL object of a resource that is mapped to the
* specified context-relative path.
*
* @param path Context-relative path of the desired resource
*
* @exception MalformedURLException if the resource path is
* not properly formed
*/
public URL getResource(String path) throws MalformedURLException {
if (!path.startsWith("/"))
throw new MalformedURLException("Path '" + path +
"' does not start with '/'");
URL url = new URL(myResourceBaseURL, path.substring(1));
InputStream is = null;
try {
is = url.openStream();
} catch (Throwable t) {
url = null;
} finally {
if (is != null) {
try {
is.close();
} catch (Throwable t2) {
// Ignore
}
}
}
return url;
}
/**
* Return an InputStream allowing access to the resource at the
* specified context-relative path.
*
* @param path Context-relative path of the desired resource
*/
public InputStream getResourceAsStream(String path) {
try {
return (getResource(path).openStream());
} catch (Throwable t) {
return (null);
}
}
/**
* Return the set of resource paths for the "directory" at the
* specified context path.
*
* @param path Context-relative base path
*/
public Set getResourcePaths(String path) {
Set thePaths = new HashSet();
if (!path.endsWith("/"))
path += "/";
String basePath = getRealPath(path);
if (basePath == null)
return (thePaths);
File theBaseDir = new File(basePath);
if (!theBaseDir.exists() || !theBaseDir.isDirectory())
return (thePaths);
String theFiles[] = theBaseDir.list();
for (int i = 0; i < theFiles.length; i++) {
File testFile = new File(basePath + File.separator + theFiles[i]);
if (testFile.isFile())
thePaths.add(path + theFiles[i]);
else if (testFile.isDirectory())
thePaths.add(path + theFiles[i] + "/");
}
return (thePaths);
}
/**
* Return descriptive information about this server.
*/
public String getServerInfo() {
return ("JspCServletContext/1.0");
}
/**
* Return a null reference for the specified servlet name.
*
* @param name Name of the requested servlet
*
* @deprecated This method has been deprecated with no replacement
*/
public Servlet getServlet(String name) throws ServletException {
return (null);
}
/**
* Return the name of this servlet context.
*/
public String getServletContextName() {
return (getServerInfo());
}
/**
* Return an empty enumeration of servlet names.
*
* @deprecated This method has been deprecated with no replacement
*/
public Enumeration getServletNames() {
return (new Vector().elements());
}
/**
* Return an empty enumeration of servlets.
*
* @deprecated This method has been deprecated with no replacement
*/
public Enumeration getServlets() {
return (new Vector().elements());
}
/**
* Log the specified message.
*
* @param message The message to be logged
*/
public void log(String message) {
myLogWriter.println(message);
}
/**
* Log the specified message and exception.
*
* @param exception The exception to be logged
* @param message The message to be logged
*
* @deprecated Use log(String,Throwable) instead
*/
public void log(Exception exception, String message) {
log(message, exception);
}
/**
* Log the specified message and exception.
*
* @param message The message to be logged
* @param exception The exception to be logged
*/
public void log(String message, Throwable exception) {
myLogWriter.println(message);
exception.printStackTrace(myLogWriter);
}
/**
* Remove the specified context attribute.
*
* @param name Name of the attribute to remove
*/
public void removeAttribute(String name) {
myAttributes.remove(name);
}
/**
* Set or replace the specified context attribute.
*
* @param name Name of the context attribute to set
* @param value Corresponding attribute value
*/
public void setAttribute(String name, Object value) {
myAttributes.put(name, value);
}
/*
* Adds the servlet with the given name, description, class name,
* init parameters, and loadOnStartup, to this servlet context.
*/
public void addServlet(String servletName,
String description,
String className,
Map initParameters,
int loadOnStartup) {
// Do nothing
return;
}
/**
* Adds servlet mappings from the given url patterns to the servlet
* with the given servlet name to this servlet context.
*/
public void addServletMapping(String servletName,
String[] urlPatterns) {
// Do nothing
return;
}
/**
* Adds the filter with the given name, description, and class name to
* this servlet context.
*/
public void addFilter(String filterName,
String description,
String className,
Map initParameters) {
// Do nothing
return;
}
public boolean setInitParameter(String name, String value) {
throw new UnsupportedOperationException();
}
public ServletRegistration.Dynamic addServlet(
String servletName, String className) {
throw new UnsupportedOperationException();
}
public ServletRegistration.Dynamic addServlet(
String servletName, Servlet servlet) {
throw new UnsupportedOperationException();
}
public ServletRegistration.Dynamic addServlet(String servletName,
Class servletClass) {
throw new UnsupportedOperationException();
}
public T createServlet(Class c)
throws ServletException {
throw new UnsupportedOperationException();
}
public ServletRegistration getServletRegistration(String servletName) {
throw new UnsupportedOperationException();
}
public Map getServletRegistrations() {
throw new UnsupportedOperationException();
}
public FilterRegistration.Dynamic addFilter(
String filterName, String className) {
throw new UnsupportedOperationException();
}
public FilterRegistration.Dynamic addFilter(
String filterName, Filter filter) {
throw new UnsupportedOperationException();
}
public FilterRegistration.Dynamic addFilter(String filterName,
Class filterClass) {
throw new UnsupportedOperationException();
}
public T createFilter(Class c) {
throw new UnsupportedOperationException();
}
public FilterRegistration getFilterRegistration(String filterName) {
throw new UnsupportedOperationException();
}
public Map getFilterRegistrations() {
throw new UnsupportedOperationException();
}
public SessionCookieConfig getSessionCookieConfig() {
throw new UnsupportedOperationException();
}
public void setSessionTrackingModes(Set sessionTrackingModes) {
throw new UnsupportedOperationException();
}
public Set getDefaultSessionTrackingModes() {
throw new UnsupportedOperationException();
}
public Set getEffectiveSessionTrackingModes() {
throw new UnsupportedOperationException();
}
public void addListener(String className) {
throw new UnsupportedOperationException();
}
public void addListener(T t) {
throw new UnsupportedOperationException();
}
public void addListener(Class listenerClass) {
throw new UnsupportedOperationException();
}
public T createListener(Class clazz)
throws ServletException {
throw new UnsupportedOperationException();
}
public JspConfigDescriptor getJspConfigDescriptor() {
return jspConfigDescriptor;
}
public ClassLoader getClassLoader() {
throw new UnsupportedOperationException();
}
public void declareRoles(String... roleNames) {
throw new UnsupportedOperationException();
}
private static final String WEB_XML = "/WEB-INF/web.xml";
private void parseWebDotXml() {
InputStream is = getResourceAsStream(WEB_XML);
if (is == null) {
return;
}
TreeNode web = null;
try {
web = new ParserUtils().parseXMLDocument(WEB_XML, is);
} catch (JasperException ex) {
log("Error in parsing web.xml", ex);
return;
}
TreeNode jspConfig = web.findChild("jsp-config");
if (jspConfig == null) {
return;
}
ArrayList taglibs = new ArrayList();
ArrayList jspPropertyGroups =
new ArrayList();
Iterator children = jspConfig.findChildren("taglib");
while (children.hasNext()) {
TreeNode taglib = children.next();
String tagUri = null;
String tagLoc = null;
TreeNode child = taglib.findChild("taglib-uri");
if (child != null)
tagUri = child.getBody();
child = taglib.findChild("taglib-location");
if (child != null)
tagLoc = child.getBody();
if (tagUri == null || tagLoc == null) {
return;
}
taglibs.add(new TaglibDescriptorImpl(tagUri, tagLoc));
}
children = jspConfig.findChildren("jsp-property-group");
while (children.hasNext()) {
ArrayList urlPatterns = new ArrayList();
String pageEncoding = null;
String scriptingInvalid = null;
String elIgnored = null;
String isXml = null;
ArrayList includePrelude = new ArrayList();
ArrayList includeCoda = new ArrayList();
String trimSpaces = null;
String poundAllowed = null;
String buffer = null;
String defaultContentType = null;
String errorOnUndeclaredNamespace = null;
TreeNode pgroup = children.next();
Iterator properties = pgroup.findChildren();
while (properties.hasNext()) {
TreeNode element = properties.next();
String tname = element.getName();
// url-patterns, preludes, and codas and accumulative, other
// properties keep last.
if ("url-pattern".equals(tname))
urlPatterns.add(element.getBody());
else if ("page-encoding".equals(tname))
pageEncoding = element.getBody();
else if ("is-xml".equals(tname))
isXml = element.getBody();
else if ("el-ignored".equals(tname))
elIgnored = element.getBody();
else if ("scripting-invalid".equals(tname))
scriptingInvalid = element.getBody();
else if ("include-prelude".equals(tname))
includePrelude.add(element.getBody());
else if ("include-coda".equals(tname))
includeCoda.add(element.getBody());
else if ("trim-directive-whitespaces".equals(tname))
trimSpaces = element.getBody();
else if ("deferred-syntax-allowed-as-literal".equals(tname))
poundAllowed = element.getBody();
else if ("default-content-type".equals(tname))
defaultContentType = element.getBody();
else if ("buffer".equals(tname))
buffer = element.getBody();
else if ("error-on-undeclared-namespace".equals(tname))
errorOnUndeclaredNamespace = element.getBody();
}
jspPropertyGroups.add(new JspPropertyGroupDescriptorImpl(
urlPatterns,
isXml,
elIgnored,
scriptingInvalid,
trimSpaces,
poundAllowed,
pageEncoding,
includePrelude,
includeCoda,
defaultContentType,
buffer,
errorOnUndeclaredNamespace));
}
jspConfigDescriptor =
new JspConfigDescriptorImpl(taglibs, jspPropertyGroups);
}
static class JspPropertyGroupDescriptorImpl
implements JspPropertyGroupDescriptor {
Collection urlPatterns;
String isXml;
String elIgnored;
String scriptingInvalid;
String trimSpaces;
String poundAllowed;
String pageEncoding;
Collection includePrelude;
Collection includeCoda;
String defaultContentType;
String buffer;
String errorOnUndeclaredNamespace;
JspPropertyGroupDescriptorImpl(Collection urlPatterns,
String isXml, String elIgnored, String scriptingInvalid,
String trimSpaces, String poundAllowed,
String pageEncoding, Collection includePrelude,
Collection includeCoda, String defaultContentType,
String buffer, String errorOnUndeclaredNamespace) {
this.urlPatterns = urlPatterns;
this.isXml = isXml;
this.elIgnored = elIgnored;
this.scriptingInvalid = scriptingInvalid;
this.trimSpaces = trimSpaces;
this.poundAllowed = poundAllowed;
this.pageEncoding = pageEncoding;
this.includePrelude = includePrelude;
this.includeCoda =includeCoda;
this.defaultContentType = defaultContentType;
this.buffer = buffer;
this.errorOnUndeclaredNamespace = errorOnUndeclaredNamespace;
}
@Override
public Collection getUrlPatterns() {
return urlPatterns;
}
@Override
public String getElIgnored() {
return elIgnored;
}
@Override
public String getPageEncoding() {
return pageEncoding;
}
@Override
public String getScriptingInvalid() {
return scriptingInvalid;
}
@Override
public String getIsXml() {
return isXml;
}
@Override
public Collection getIncludePreludes() {
return includePrelude;
}
@Override
public Collection getIncludeCodas() {
return includeCoda;
}
@Override
public String getDeferredSyntaxAllowedAsLiteral() {
return poundAllowed;
}
@Override
public String getTrimDirectiveWhitespaces() {
return trimSpaces;
}
@Override
public String getDefaultContentType() {
return defaultContentType;
}
@Override
public String getBuffer() {
return buffer;
}
@Override
public String getErrorOnUndeclaredNamespace() {
return errorOnUndeclaredNamespace;
}
}
static class TaglibDescriptorImpl implements TaglibDescriptor {
String uri, loc;
public TaglibDescriptorImpl(String uri, String loc) {
this.uri = uri;
this.loc = loc;;
}
public String getTaglibURI() {
return uri;
}
public String getTaglibLocation() {
return loc;
}
}
static class JspConfigDescriptorImpl implements JspConfigDescriptor {
Collection taglibs;
Collection jspPropertyGroups;
public JspConfigDescriptorImpl(Collection taglibs,
Collection jspPropertyGroups) {
this.taglibs = taglibs;
this.jspPropertyGroups = jspPropertyGroups;
}
public Collection getTaglibs() {
return this.taglibs;
}
public Collection getJspPropertyGroups() {
return this.jspPropertyGroups;
}
}
}
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