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package com.sun.grizzly.rails;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.channels.SocketChannel;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.logging.Level;
import org.apache.coyote.ActionCode;
import org.apache.coyote.Adapter;
import org.apache.coyote.Request;
import org.apache.coyote.Response;
import org.apache.coyote.http11.InternalOutputBuffer;
import org.apache.tomcat.util.buf.ByteChunk;
import org.apache.tomcat.util.buf.MessageBytes;
import org.jruby.Ruby;
import org.jruby.RubyException;
import org.jruby.RubyIO;
import org.jruby.exceptions.RaiseException;
import org.jruby.javasupport.JavaEmbedUtils;
import org.jruby.runtime.builtin.IRubyObject;
import com.sun.enterprise.web.connector.grizzly.SelectorThread;
import com.sun.enterprise.web.connector.grizzly.SocketChannelOutputBuffer;
import com.sun.enterprise.web.connector.grizzly.standalone.StaticResourcesAdapter;
/**
* Adapter implementation that brige JRuby on Rails with Grizzly.
*
* @author TAKAI Naoto
* @author Jean-Francois Arcand
*/
public class RailsAdapter extends StaticResourcesAdapter
implements Adapter{
private static final String RFC_2616_FORMAT = "EEE, d MMM yyyy HH:mm:ss z";
private static final int RAILS_TOKEN = 1;
private final String publicDirectory;
private RubyObjectPool pool = null;
private RailAsyncFilter railAsyncFilter;
public RailsAdapter(RubyObjectPool pool, RailAsyncFilter railAsyncFilter) {
super();
this.pool = pool;
this.publicDirectory = pool.getRailsRoot() + "/public";
this.railAsyncFilter = railAsyncFilter;
}
public void afterService(Request req, Response res) throws Exception {
try {
req.action(ActionCode.ACTION_POST_REQUEST, null);
} catch (Throwable t) {
t.printStackTrace();
} finally {
// Recycle the wrapper request and response
req.recycle();
res.recycle();
}
}
public void fireAdapterEvent(String type, Object data) {
}
public void service(Request req, Response res) throws Exception {
MessageBytes mb = req.requestURI();
ByteChunk requestURI = mb.getByteChunk();
try{
String uri = requestURI.toString();
File file = new File(publicDirectory,uri);
if (file.isDirectory()) {
uri += "index.html";
file = new File(file,uri);
}
if (file.canRead()) {
super.service(req, res);
return;
} else {
serviceRails(req, res);
}
res.finish();
} catch (Exception e) {
if (SelectorThread.logger().isLoggable(Level.SEVERE)) {
SelectorThread.logger().log(Level.SEVERE, e.getMessage());
}
throw e;
}
}
private SocketChannel getChannel(Response res) {
SocketChannelOutputBuffer buffer = (SocketChannelOutputBuffer) res.getOutputBuffer();
SocketChannel channel = buffer.getChannel();
return channel;
}
private boolean modifiedSince(Request req, File file) {
try {
String since = req.getMimeHeaders().getHeader("If-Modified-Since");
if (since == null) {
return false;
}
Date date = new SimpleDateFormat(RFC_2616_FORMAT, Locale.US).parse(since);
if (date.getTime() > file.lastModified()) {
return true;
} else {
return false;
}
} catch (ParseException e) {
return false;
}
}
private void serviceRails(Request req, Response res) throws IOException {
Ruby runtime = null;
RailsToken rt = (RailsToken)req.getNote(RAILS_TOKEN);
if (rt == null){
rt = new RailsToken();
}
rt.req = req;
try {
runtime = pool.bollowRuntime();
if (runtime == null){
throw new IllegalStateException();
}
req.doRead(rt.readChunk);
((InternalOutputBuffer)res.getOutputBuffer()).commit();
res.setCommitted(true);
IRubyObject reqObj = JavaEmbedUtils.javaToRuby(runtime, req);
IRubyObject loggerObj = JavaEmbedUtils.javaToRuby(runtime, SelectorThread.logger());
OutputStream os =
((InternalOutputBuffer)res.getOutputBuffer()).getOutputStream();
RubyIO iObj = new RubyIO(runtime, rt.inputStream);
RubyIO oObj = new RubyIO(runtime, os);
runtime.defineReadonlyVariable("$req", reqObj);
runtime.defineReadonlyVariable("$stdin", iObj);
runtime.defineReadonlyVariable("$stdout", oObj);
runtime.defineReadonlyVariable("$logger", loggerObj);
runtime.getLoadService().load("dispatch.rb");
} catch (RaiseException e) {
RubyException exception = e.getException();
System.err.println(e.getMessage());
exception.printBacktrace(System.err);
throw e;
} finally {
rt.recycle();
req.setNote(RAILS_TOKEN,rt);
if (runtime != null) {
pool.returnRuntime(runtime);
railAsyncFilter.unpark();
}
}
}
private class RailsInputStream extends InputStream{
public RailsToken rt;
public int read() throws IOException {
return rt.readChunk.substract();
}
public int read(byte[] b) throws IOException {
return read(b,0,b.length);
}
public int read(byte[] b, int off, int len) throws IOException {
return rt.readChunk.substract(b,off,len);
}
}
/**
* Statefull token used to share information with the Rails runtime
* in a thread safe manner.
*/
private class RailsToken implements ByteChunk.ByteInputChannel{
public ByteChunk readChunk;
public Request req;
public RailsInputStream inputStream;
public RailsToken(){
readChunk = new ByteChunk();
readChunk.setByteInputChannel(this);
readChunk.setBytes(new byte[8192],0,8192);
inputStream = new RailsInputStream();
inputStream.rt = this;
}
public int realReadBytes(byte[] b, int off, int len) throws IOException {
req.doRead(readChunk);
return readChunk.substract(b,off,len);
}
public void recycle(){
req = null;
readChunk.recycle();
}
}
}
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