org.glassfish.grizzly.servlet.DispatchedHttpServletRequest Maven / Gradle / Ivy
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package org.glassfish.grizzly.servlet;
import java.nio.charset.Charset;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.*;
import javax.servlet.AsyncContext;
import javax.servlet.DispatcherType;
import javax.servlet.RequestDispatcher;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import org.glassfish.grizzly.http.server.util.Enumerator;
import org.glassfish.grizzly.http.server.util.Globals;
import org.glassfish.grizzly.http.server.util.ParameterMap;
import org.glassfish.grizzly.http.util.Constants;
import org.glassfish.grizzly.http.util.DataChunk;
import org.glassfish.grizzly.http.util.Parameters;
import org.glassfish.grizzly.utils.Charsets;
/**
* Wrapper around a javax.servlet.http.HttpServletRequest
* that transforms an application request object (which might be the original
* one passed to a servlet.
*
* @author Bongjae Chang
*/
public class DispatchedHttpServletRequest extends HttpServletRequestWrapper {
// ------------------------------------------------------- Static Variables
/**
* The set of attribute names that are special for request dispatchers
*/
private static final HashSet specials = new HashSet(15);
static {
specials.add(RequestDispatcher.INCLUDE_REQUEST_URI);
specials.add(RequestDispatcher.INCLUDE_CONTEXT_PATH);
specials.add(RequestDispatcher.INCLUDE_SERVLET_PATH);
specials.add(RequestDispatcher.INCLUDE_PATH_INFO);
specials.add(RequestDispatcher.INCLUDE_QUERY_STRING);
specials.add(RequestDispatcher.FORWARD_REQUEST_URI);
specials.add(RequestDispatcher.FORWARD_CONTEXT_PATH);
specials.add(RequestDispatcher.FORWARD_SERVLET_PATH);
specials.add(RequestDispatcher.FORWARD_PATH_INFO);
specials.add(RequestDispatcher.FORWARD_QUERY_STRING);
specials.add(AsyncContext.ASYNC_REQUEST_URI);
specials.add(AsyncContext.ASYNC_CONTEXT_PATH);
specials.add(AsyncContext.ASYNC_SERVLET_PATH);
specials.add(AsyncContext.ASYNC_PATH_INFO);
specials.add(AsyncContext.ASYNC_QUERY_STRING);
}
// ----------------------------------------------------------- Constructors
/**
* Construct a new wrapped request around the specified servlet request.
*
* @param request the servlet request being wrapped
* @param dispatcherType the dispatcher type
*/
public DispatchedHttpServletRequest(HttpServletRequest request,
WebappContext context,
boolean crossContext,
DispatcherType dispatcherType) {
super(request);
this.context = context;
this.crossContext = crossContext;
this.dispatcherType = dispatcherType;
setRequest(request);
}
// ----------------------------------------------------- Instance Variables
/**
* The context for this request.
*/
protected WebappContext context = null;
/**
* The context path for this request.
*/
protected String contextPath = null;
/**
* If this request is cross context, since this changes session access
* behavior.
*/
protected boolean crossContext = false;
/**
* The dispatcher type.
*/
protected final DispatcherType dispatcherType;
/**
* Hash map used in the getParametersMap method.
*/
private final ParameterMap parameterMap = new ParameterMap();
private final Parameters mergedParameters = new Parameters();
/**
* Have the parameters for this request already been parsed?
*/
private boolean parsedParams = false;
/**
* The path information for this request.
*/
protected String pathInfo = null;
/**
* The query parameters for the current request.
*/
private String queryParamString = null;
/**
* The query string for this request.
*/
protected String queryString = null;
/**
* The current request dispatcher path.
*/
protected Object requestDispatcherPath = null;
/**
* The request URI for this request.
*/
protected String requestURI = null;
/**
* The servlet path for this request.
*/
protected String servletPath = null;
/**
* Special attributes.
*/
private HashMap specialAttributes = null;
// ------------------------------------------------- ServletRequest Methods
/**
* Override the getAttribute() method of the wrapped request.
*
* @param name Name of the attribute to retrieve
*/
@Override
public Object getAttribute(String name) {
if (name.equals(Globals.DISPATCHER_REQUEST_PATH_ATTR)) {
if ( requestDispatcherPath != null ){
return requestDispatcherPath.toString();
} else {
return null;
}
}
if (!isSpecial(name)) {
return getRequest().getAttribute(name);
} else {
Object value = null;
if (specialAttributes != null) {
value = specialAttributes.get(name);
}
if (value == null && name.startsWith("javax.servlet.forward")) {
/*
* If it's a forward special attribute, and null, delegate
* to the wrapped request. This will allow access to the
* forward special attributes from a request that was first
* forwarded and then included, or forwarded multiple times
* in a row.
* Notice that forward special attributes are set only on
* the wrapper that was created for the initial forward
* (i.e., the top-most wrapper for a request that was
* forwarded multiple times in a row, and never included,
* will not contain any specialAttributes!).
* This is different from an include, where the special
* include attributes are set on every include wrapper.
*/
value = getRequest().getAttribute(name);
}
return value;
}
}
/**
* Override the getAttributeNames() method of the wrapped
* request.
*/
@Override
public Enumeration getAttributeNames() {
return (new AttributeNamesEnumerator());
}
/**
* Override the removeAttribute() method of the
* wrapped request.
*
* @param name Name of the attribute to remove
*/
@Override
public void removeAttribute(String name) {
if (isSpecial(name)) {
if (specialAttributes != null) {
specialAttributes.remove(name);
}
} else {
getRequest().removeAttribute(name);
}
}
/**
* Override the setAttribute() method of the
* wrapped request.
*
* @param name Name of the attribute to set
* @param value Value of the attribute to set
*/
@Override
public void setAttribute(String name, Object value) {
if (name.equals(Globals.DISPATCHER_REQUEST_PATH_ATTR)) {
requestDispatcherPath = value;
return;
}
if (isSpecial(name)) {
if (specialAttributes != null) {
specialAttributes.put(name, value);
}
} else {
getRequest().setAttribute(name, value);
}
}
/**
* Return a RequestDispatcher that wraps the resource at the specified
* path, which may be interpreted as relative to the current request path.
*
* @param path Path of the resource to be wrapped
*/
@Override
public RequestDispatcher getRequestDispatcher(String path) {
if (context == null)
return (null);
// If the path is already context-relative, just pass it through
if (path == null)
return (null);
else if (path.startsWith("/"))
return (context.getRequestDispatcher(path));
// Convert a request-relative path to a context-relative one
String servletPath =
(String) getAttribute(RequestDispatcher.INCLUDE_SERVLET_PATH);
if (servletPath == null)
servletPath = getServletPath();
// Add the path info, if there is any
String pathInfo = getPathInfo();
String requestPath = null;
if (pathInfo == null) {
requestPath = servletPath;
} else {
requestPath = servletPath + pathInfo;
}
int pos = requestPath.lastIndexOf('/');
String relative = null;
if (pos >= 0) {
relative = requestPath.substring(0, pos + 1) + path;
} else {
relative = requestPath + path;
}
return (context.getRequestDispatcher(relative));
}
@Override
public DispatcherType getDispatcherType() {
return dispatcherType;
}
// --------------------------------------------- HttpServletRequest Methods
/**
* Override the getContextPath() method of the wrapped
* request.
*/
@Override
public String getContextPath() {
return (this.contextPath);
}
/**
* Override the getParameter() method of the wrapped request.
*
* @param name Name of the requested parameter
*/
@Override
public String getParameter(String name) {
if (!parsedParams) {
parseParameters();
}
if (System.getSecurityManager() != null) {
return AccessController.doPrivileged(
new GetParameterPrivilegedAction(name));
} else {
return mergedParameters.getParameter(name);
}
}
/**
* Override the getParameterMap() method of the
* wrapped request.
*/
@Override
public Map getParameterMap() {
if (!parsedParams) {
parseParameters();
}
if (System.getSecurityManager() != null) {
return AccessController.doPrivileged(
new GetParameterMapPrivilegedAction());
} else {
return getParameterMapInternal();
}
}
/**
* Override the getParameterNames() method of the
* wrapped request.
*/
@Override
public Enumeration getParameterNames() {
if (!parsedParams) {
parseParameters();
}
if (System.getSecurityManager() != null) {
return new Enumerator(AccessController.doPrivileged(
new GetParameterNamesPrivilegedAction()));
} else {
return new Enumerator(mergedParameters.getParameterNames());
}
}
/**
* Override the getParameterValues() method of the
* wrapped request.
*
* @param name Name of the requested parameter
*/
@Override
public String[] getParameterValues(String name) {
if (!parsedParams) {
parseParameters();
}
String[] ret;
/*
* Clone the returned array only if there is a security manager
* in place, so that performance won't suffer in the nonsecure case
*/
if (System.getSecurityManager() != null) {
ret = AccessController.doPrivileged(
new GetParameterValuePrivilegedAction(name));
if (ret != null) {
ret = ret.clone();
}
} else {
ret = mergedParameters.getParameterValues(name);
}
return ret;
}
private ParameterMap getParameterMapInternal() {
if (parameterMap.isLocked()) {
return parameterMap;
}
for (final String name : mergedParameters.getParameterNames()) {
final String[] values = mergedParameters.getParameterValues(name);
parameterMap.put(name, values);
}
parameterMap.setLocked(true);
return parameterMap;
}
/**
* Parses the parameters of this request.
*
* If parameters are present in both the query string and the request
* content, they are merged.
*/
@SuppressWarnings( "unchecked")
private void parseParameters() {
if (parsedParams) {
return;
}
final String enc = getCharacterEncoding();
Charset charset;
if (enc != null) {
try {
charset = Charsets.lookupCharset(enc);
} catch (Exception e) {
charset = Constants.DEFAULT_HTTP_CHARSET;
}
} else {
charset = Constants.DEFAULT_HTTP_CHARSET;
}
mergedParameters.setEncoding(charset);
mergedParameters.setQueryStringEncoding(charset);
DataChunk queryDC = DataChunk.newInstance();
queryDC.setString(queryParamString);
mergedParameters.setQuery(queryDC);
mergedParameters.handleQueryParameters();
Map paramMap = getRequest().getParameterMap();
for (final Map.Entry entry : paramMap.entrySet()) {
mergedParameters.addParameterValues(entry.getKey(), entry.getValue());
}
parsedParams = true;
}
/**
* Override the getPathInfo() method of the wrapped request.
*/
@Override
public String getPathInfo() {
return (this.pathInfo);
}
/**
* Override the getQueryString() method of the wrapped
* request.
*/
@Override
public String getQueryString() {
return (this.queryString);
}
/**
* Override the getRequestURI() method of the wrapped
* request.
*/
@Override
public String getRequestURI() {
return (this.requestURI);
}
/**
* Override the getRequestURL() method of the wrapped
* request.
*/
@Override
public StringBuffer getRequestURL() {
StringBuffer url = new StringBuffer();
String scheme = getScheme();
int port = getServerPort();
if (port < 0)
port = 80; // Work around java.net.URL bug
url.append(scheme);
url.append("://");
url.append(getServerName());
if ((scheme.equals("http") && (port != 80))
|| (scheme.equals("https") && (port != 443))) {
url.append(':');
url.append(port);
}
url.append(getRequestURI());
return (url);
}
/**
* Override the getServletPath() method of the wrapped
* request.
*/
@Override
public String getServletPath() {
return (this.servletPath);
}
// -------------------------------------------------------- Package Methods
/**
* Perform a shallow copy of the specified Map, and return the result.
*
* @param orig Origin Map to be copied
*/
void copyMap(Map orig, Map dest) {
if (orig == null)
return;
//noinspection SynchronizationOnLocalVariableOrMethodParameter
synchronized (orig) {
for (Map.Entry entry : orig.entrySet()) {
dest.put(entry.getKey(), entry.getValue());
}
}
}
/**
* Set the context path for this request.
*
* @param contextPath The new context path
*/
void setContextPath(String contextPath) {
this.contextPath = contextPath;
}
/**
* Set the path information for this request.
*
* @param pathInfo The new path info
*/
void setPathInfo(String pathInfo) {
this.pathInfo = pathInfo;
}
/**
* Set the query string for this request.
*
* @param queryString The new query string
*/
void setQueryString(String queryString) {
this.queryString = queryString;
}
/**
* Set the request that we are wrapping.
*
* @param request The new wrapped request
*/
void setRequest(HttpServletRequest request) {
super.setRequest(request);
// Initialize the attributes for this request
requestDispatcherPath =
request.getAttribute(Globals.DISPATCHER_REQUEST_PATH_ATTR);
// Initialize the path elements for this request
contextPath = request.getContextPath();
pathInfo = request.getPathInfo();
queryString = request.getQueryString();
requestURI = request.getRequestURI();
servletPath = request.getServletPath();
}
/**
* Set the request URI for this request.
*
* @param requestURI The new request URI
*/
void setRequestURI(String requestURI) {
this.requestURI = requestURI;
}
/**
* Set the servlet path for this request.
*
* @param servletPath The new servlet path
*/
void setServletPath(String servletPath) {
this.servletPath = servletPath;
}
/**
* Save query parameters for this request.
*
* @param queryString The query string containing parameters for this
* request
*/
void setQueryParams(String queryString) {
this.queryParamString = queryString;
}
// ------------------------------------------------------ Protected Methods
/**
* Is this attribute name one of the special ones that is added only for
* included servlets?
*
* @param name Attribute name to be tested
*/
protected boolean isSpecial(String name) {
return specials.contains(name);
}
/**
* Initializes the special attributes of this request wrapper.
*
* @param requestUri The request URI
* @param contextPath The context path
* @param servletPath The servlet path
* @param pathInfo The path info
* @param queryString The query string
*/
void initSpecialAttributes(String requestUri,
String contextPath,
String servletPath,
String pathInfo,
String queryString) {
specialAttributes = new HashMap(5);
switch (dispatcherType) {
case INCLUDE:
specialAttributes.put(RequestDispatcher.INCLUDE_REQUEST_URI,
requestUri);
specialAttributes.put(RequestDispatcher.INCLUDE_CONTEXT_PATH,
contextPath);
specialAttributes.put(RequestDispatcher.INCLUDE_SERVLET_PATH,
servletPath);
specialAttributes.put(RequestDispatcher.INCLUDE_PATH_INFO,
pathInfo);
specialAttributes.put(RequestDispatcher.INCLUDE_QUERY_STRING,
queryString);
break;
case FORWARD:
case ERROR:
specialAttributes.put(RequestDispatcher.FORWARD_REQUEST_URI,
requestUri);
specialAttributes.put(RequestDispatcher.FORWARD_CONTEXT_PATH,
contextPath);
specialAttributes.put(RequestDispatcher.FORWARD_SERVLET_PATH,
servletPath);
specialAttributes.put(RequestDispatcher.FORWARD_PATH_INFO,
pathInfo);
specialAttributes.put(RequestDispatcher.FORWARD_QUERY_STRING,
queryString);
break;
case ASYNC:
specialAttributes.put(AsyncContext.ASYNC_REQUEST_URI,
requestUri);
specialAttributes.put(AsyncContext.ASYNC_CONTEXT_PATH,
contextPath);
specialAttributes.put(AsyncContext.ASYNC_SERVLET_PATH,
servletPath);
specialAttributes.put(AsyncContext.ASYNC_PATH_INFO,
pathInfo);
specialAttributes.put(AsyncContext.ASYNC_QUERY_STRING,
queryString);
break;
default: // REQUEST
break;
}
}
/**
* Merge the two sets of parameter values into a single String array.
*
* @param values1 First set of values
* @param values2 Second set of values
*/
protected String[] mergeValues(Object values1, Object values2) {
ArrayList results = new ArrayList();
if (values1 == null)
;
else if (values1 instanceof String)
results.add((String)values1);
else if (values1 instanceof String[]) {
String values[] = (String[]) values1;
Collections.addAll(results, values);
} else
results.add(values1.toString());
if (values2 == null)
;
else if (values2 instanceof String)
results.add((String)values2);
else if (values2 instanceof String[]) {
String values[] = (String[]) values2;
Collections.addAll(results, values);
} else
results.add(values2.toString());
String values[] = new String[results.size()];
return results.toArray(values);
}
public void recycle() {
// parameterMap.setLocked( false );
// parameterMap.clear();
}
// ----------------------------------- AttributeNamesEnumerator Inner Class
/**
* Utility class used to expose the special attributes as being available
* as request attributes.
*/
private final class AttributeNamesEnumerator implements Enumeration {
Enumeration parentEnumeration = null;
String next = null;
private Iterator specialNames = null;
@SuppressWarnings( "unchecked" )
public AttributeNamesEnumerator() {
parentEnumeration = getRequest().getAttributeNames();
if (specialAttributes != null) {
specialNames = specialAttributes.keySet().iterator();
}
}
@Override
public boolean hasMoreElements() {
return (specialNames != null && specialNames.hasNext())
|| (next != null)
|| ((next = findNext()) != null);
}
@Override
public String nextElement() {
if (specialNames != null && specialNames.hasNext()) {
return specialNames.next();
}
String result = next;
if (next != null) {
next = findNext();
} else {
throw new NoSuchElementException();
}
return result;
}
protected String findNext() {
String result = null;
while ((result == null) && (parentEnumeration.hasMoreElements())) {
String current = parentEnumeration.nextElement();
if (!isSpecial(current) ||
(!dispatcherType.equals(DispatcherType.FORWARD) &&
current.startsWith("javax.servlet.forward") &&
getAttribute(current) != null)) {
result = current;
}
}
return result;
}
}
public HttpServletRequestImpl getRequestFacade() {
if (getRequest() instanceof HttpServletRequestImpl) {
return (HttpServletRequestImpl) getRequest();
} else {
return ((DispatchedHttpServletRequest)getRequest()).getRequestFacade();
}
}
private final class GetParameterPrivilegedAction implements PrivilegedAction {
public final String name;
public GetParameterPrivilegedAction( String name ) {
this.name = name;
}
@Override
public String run() {
return mergedParameters.getParameter( name );
}
}
private final class GetParameterNamesPrivilegedAction implements PrivilegedAction> {
@Override
public Set run() {
return mergedParameters.getParameterNames();
}
}
private final class GetParameterValuePrivilegedAction implements PrivilegedAction {
public final String name;
public GetParameterValuePrivilegedAction( String name ) {
this.name = name;
}
@Override
public String[] run() {
return mergedParameters.getParameterValues( name );
}
}
private final class GetParameterMapPrivilegedAction implements PrivilegedAction {
@Override
public ParameterMap run() {
return getParameterMapInternal();
}
}
}
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