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package com.sun.grizzly.tcp.http11;
import com.sun.grizzly.tcp.Request;
import com.sun.grizzly.util.http.DispatcherHelper;
import com.sun.grizzly.util.buf.CharChunk;
import com.sun.grizzly.util.buf.MessageBytes;
import com.sun.grizzly.util.buf.UDecoder;
import com.sun.grizzly.util.http.HttpRequestURIDecoder;
import com.sun.grizzly.util.http.mapper.Mapper;
import com.sun.grizzly.util.http.mapper.MappingData;
import java.util.Map.Entry;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Level;
/**
* The GrizzlyAdapterChain class allow the invokation of multiple {@link GrizzlyAdapter}
* every time a new HTTP requests is ready to be handled. Requests are mapped
* to their associated {@link GrizzlyAdapter} at runtime using the mapping
* information configured when invoking the {@link GrizzlyAdapterChain#addGrizzlyAdapter
* (com.sun.grizzly.tcp.http11.GrizzlyAdapter, java.lang.String[])
*
* Below is a simple example using two {@link Servlet}
*
*
GrizzlyWebServer ws = new GrizzlyWebServer(path);
ServletAdapter sa = new ServletAdapter();
sa.setRootFolder(".");
sa.setServletInstance(new ServletTest("Adapter-1"));
ws.addGrizzlyAdapter(sa, new String[]{"/Adapter-1"});
ServletAdapter sa2 = new ServletAdapter();
sa2.setRootFolder("/tmp");
sa2.setServletInstance(new ServletTest("Adapter-2"));
ws.addGrizzlyAdapter(sa2, new String[]{"/Adapter-2"});
System.out.println("Grizzly WebServer listening on port 8080");
ws.start();
*
*
*
* Note: This class is NOT thread-safe, so make sure you synchronize
* when dynamically adding and removing {@link GrizzlyAdapter}
*
* @author Jeanfrancois Arcand
*/
public class GrizzlyAdapterChain extends GrizzlyAdapter {
private UDecoder urlDecoder = new UDecoder();
protected final static int MAPPING_DATA = 12;
protected final static int MAPPED_ADAPTER = 13;
protected final static int INVOKED_ADAPTER = 15;
/**
* The name -> {@link GrizzlyAdapter} map.
*/
private final ConcurrentHashMap adaptersByName =
new ConcurrentHashMap();
/**
* The list of {@link GrizzlyAdapter} instance.
*/
private ConcurrentHashMap adapters =
new ConcurrentHashMap();
/**
* Internal {@link Mapper} used to Map request to their associated {@link GrizzlyAdapter}
*/
private Mapper mapper = new Mapper();
/**
* The default host.
*/
private final static String LOCAL_HOST = "localhost";
/**
* Use the deprecated mechanism.
*/
private boolean oldMappingAlgorithm = false;
/**
* Is the root context configured?
*/
private boolean isRootConfigured = false;
/**
* DispatcherHelper, which maps path or name to the Mapper entry.
*/
private final DispatcherHelper dispatcherHelper;
public GrizzlyAdapterChain() {
mapper.setDefaultHostName(LOCAL_HOST);
setHandleStaticResources(false);
dispatcherHelper = new DispatcherHelperImpl();
// We will decode it
setDecodeUrl(false);
}
@Override
public void start() {
for (Entry entry : adapters.entrySet()) {
entry.getKey().start();
}
}
/**
* Map the {@link GrizzlyRequest} to the proper {@link GrizzlyAdapter}
* @param request The {@link GrizzlyRequest}
* @param response The {@link GrizzlyResponse}
*/
@Override
public void service(GrizzlyRequest request, GrizzlyResponse response)
throws Exception {
// For backward compatibility.
final Request req = request.getRequest();
req.setNote(INVOKED_ADAPTER, null);
if (oldMappingAlgorithm) {
int i = 0;
int size = adapters.size();
for (Entry entry : adapters.entrySet()) {
final GrizzlyAdapter adapter = entry.getKey();
adapter.service(request, response);
if (response.getStatus() == 404 && i != size - 1) {
// Reset the
response.setStatus(200, "OK");
} else {
req.setNote(INVOKED_ADAPTER, adapter);
return;
}
}
} else {
MappingData mappingData = null;
try {
MessageBytes decodedURI = req.decodedURI();
decodedURI.duplicate(req.requestURI());
mappingData = (MappingData) req.getNote(MAPPING_DATA);
if (mappingData == null) {
mappingData = new MappingData();
req.setNote(MAPPING_DATA, mappingData);
} else {
mappingData.recycle();
}
HttpRequestURIDecoder.decode(decodedURI, urlDecoder, null, null);
if (mappingData == null) {
mappingData = (MappingData) req.getNote(MAPPING_DATA);
}
// Map the request without any trailling.
// Map the request to its Adapter
mapUriWithSemicolon(req.serverName(), decodedURI, 0, mappingData);
GrizzlyAdapter adapter = null;
if (mappingData.context != null && mappingData.context instanceof GrizzlyAdapter) {
if (mappingData.wrapper != null) {
adapter = (GrizzlyAdapter) mappingData.wrapper;
} else {
adapter = (GrizzlyAdapter) mappingData.context;
}
// We already decoded the URL.
adapter.setDecodeUrl(false);
adapter.service(request.getRequest(), response.getResponse());
req.setNote(INVOKED_ADAPTER, adapter);
} else {
response.getResponse().setStatus(404);
customizedErrorPage(req, response.getResponse());
}
} catch (Throwable t) {
try {
response.setStatus(404);
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE, "Invalid URL: " + req.decodedURI(), t);
}
customizedErrorPage(req, response.getResponse());
} catch (Exception ex2) {
if (logger.isLoggable(Level.WARNING)) {
logger.log(Level.WARNING, "Unable to error page", ex2);
}
}
}
}
}
@Override
public void afterService(GrizzlyRequest request,
GrizzlyResponse response) throws Exception {
final Request req = request.getRequest();
final GrizzlyAdapter adapter = (GrizzlyAdapter) req.getNote(INVOKED_ADAPTER);
if (adapter != null) {
adapter.afterService(request, response);
}
}
/**
* Add a {@link GrizzlyAdapter} to the chain.
* @param {@link GrizzlyAdapter} to the chain.
* @deprecated - uses {@link GrizzlyAdapterChain#addGrizzlyAdapter(com.sun.grizzly.tcp.http11.GrizzlyAdapter, java.lang.String[])}
*/
public void addGrizzlyAdapter(GrizzlyAdapter adapter) {
oldMappingAlgorithm = true;
adapters.put(adapter, new String[]{""});
}
/**
* Add a {@link GrizzlyAdapter} and its assciated array of mapping. The mapping
* data will be used to map incoming request to its associated {@link GrizzlyAdapter}.
* @param adapter {@link GrizzlyAdapter} instance
* @param mappings an array of mapping.
*/
public void addGrizzlyAdapter(GrizzlyAdapter adapter, String[] mappings) {
if (oldMappingAlgorithm) {
throw new IllegalStateException("Cannot mix addGrizzlyAdapter(GrizzlyAdapter) " +
"and addGrizzlyAdapter(GrizzlyAdapter,String[]");
}
if (mappings.length == 0) {
addGrizzlyAdapter(adapter);
} else {
adapters.put(adapter, mappings);
final String name = adapter.getName();
if (name != null) {
adaptersByName.put(adapter.getName(), adapter);
}
for (String mapping : mappings) {
String ctx = getContextPath(mapping);
String wrapper = getWrapperPath(ctx, mapping);
if (!ctx.equals("")){
mapper.addContext(LOCAL_HOST, ctx, adapter,
new String[]{"index.html", "index.htm"}, null);
} else {
if (!isRootConfigured && wrapper.startsWith("*.")){
isRootConfigured = true;
GrizzlyAdapter a = new GrizzlyAdapter(getRootFolder()){
{
setHandleStaticResources(false);
}
@Override
public void service(GrizzlyRequest request, GrizzlyResponse response) {
try {
customizedErrorPage(request.getRequest(), response.getResponse());
} catch (Exception ex) {
}
}
};
mapper.addContext(LOCAL_HOST, ctx, a,
new String[]{"index.html", "index.htm"}, null);
} else {
mapper.addContext(LOCAL_HOST, ctx, adapter,
new String[]{"index.html", "index.htm"}, null);
}
}
mapper.addWrapper(LOCAL_HOST,ctx, wrapper , adapter);
adapter.setDispatcherHelper(dispatcherHelper);
}
}
}
private String getWrapperPath(String ctx, String mapping) {
if (mapping.indexOf("*.") > 0) {
return mapping.substring(mapping.lastIndexOf("/") + 1);
} else if (!ctx.equals("")) {
return mapping.substring(ctx.length());
} else {
return mapping;
}
}
private String getContextPath(String mapping) {
String ctx = "";
int slash = mapping.indexOf("/", 1);
if (slash != -1) {
ctx = mapping.substring(0, slash);
} else {
ctx = mapping;
}
if (ctx.startsWith("/*.") ||ctx.startsWith("*.") ) {
if (ctx.indexOf("/") == ctx.lastIndexOf("/")){
ctx = "";
} else {
ctx = ctx.substring(1);
}
}
if (ctx.startsWith("/*") || ctx.startsWith("*")) {
ctx = "";
}
// Special case for the root context
if (ctx.equals("/")) {
ctx = "";
}
return ctx;
}
@Override
public void destroy() {
for (Entry adapter : adapters.entrySet()) {
adapter.getKey().destroy();
}
}
/**
* Remove a {@link GrizzlyAdapter}
* @return true if removed
*/
public boolean removeAdapter(GrizzlyAdapter adapter) {
if (adapter == null) {
throw new IllegalStateException();
}
final String name = adapter.getName();
if (name != null) {
adaptersByName.remove(name);
}
String[] mappings = adapters.remove(adapter);
if (mappings != null) {
for (String mapping : mappings) {
String ctx = getContextPath(mapping);
mapper.removeContext(LOCAL_HOST, ctx);
}
adapter.destroy();
}
return (mappings != null);
}
/**
* Maps the decodedURI to the corresponding Adapter, considering that URI
* may have a semicolon with extra data followed, which shouldn't be a part
* of mapping process.
*
* @param serverName server name per the Host header.
* @param decodedURI URI
* @param semicolonPos semicolon position. Might be 0 if position
* wasn't resolved yet (so it will be resolved in the method), or
* -1 if there is no semicolon in the URI.
* @param mappingData mapping data for this request
*
* @throws Exception if an error occurs mapping the request
*/
private void mapUriWithSemicolon(final MessageBytes serverName,
final MessageBytes decodedURI, int semicolonPos,
final MappingData mappingData) throws Exception {
final CharChunk charChunk = decodedURI.getCharChunk();
final int oldEnd = charChunk.getEnd();
if (semicolonPos == 0) {
semicolonPos = decodedURI.indexOf(';');
}
if (semicolonPos == -1) {
semicolonPos = oldEnd;
}
charChunk.setEnd(semicolonPos);
try {
mapper.map(serverName, decodedURI, mappingData);
} finally {
charChunk.setEnd(oldEnd);
}
}
private final class DispatcherHelperImpl implements DispatcherHelper {
public void mapPath(final MessageBytes host, final MessageBytes path,
final MappingData mappingData) throws Exception {
mapper.map(host, path, mappingData);
}
public void mapName(final MessageBytes name, final MappingData mappingData) {
final String nameStr = name.toString();
final GrizzlyAdapter handler = adaptersByName.get(nameStr);
if (handler != null) {
mappingData.wrapper = handler;
mappingData.servletName = nameStr;
}
}
}
}
