package io.undertow.websockets.spi;
import io.undertow.UndertowLogger;
import io.undertow.io.IoCallback;
import io.undertow.io.Sender;
import io.undertow.server.ExchangeCompletionListener;
import io.undertow.server.HttpServerExchange;
import io.undertow.util.AttachmentKey;
import io.undertow.util.HeaderMap;
import io.undertow.util.HttpString;
import org.xnio.ChannelListener;
import org.xnio.FinishedIoFuture;
import org.xnio.FutureResult;
import org.xnio.IoFuture;
import org.xnio.IoUtils;
import org.xnio.Pool;
import org.xnio.Pooled;
import org.xnio.channels.StreamSourceChannel;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* @author Stuart Douglas
*/
public class AsyncWebSocketHttpServerExchange implements WebSocketHttpExchange {
private final HttpServerExchange exchange;
private Sender sender;
public AsyncWebSocketHttpServerExchange(final HttpServerExchange exchange) {
this.exchange = exchange;
}
@Override
public <T> void putAttachment(final AttachmentKey<T> key, final T value) {
exchange.putAttachment(key, value);
}
@Override
public <T> T getAttachment(final AttachmentKey<T> key) {
return exchange.getAttachment(key);
}
@Override
public String getRequestHeader(final String headerName) {
return exchange.getRequestHeaders().getFirst(HttpString.tryFromString(headerName));
}
@Override
public Map<String, List<String>> getRequestHeaders() {
Map<String, List<String>> headers = new HashMap<String, List<String>>();
for (final HttpString header : exchange.getRequestHeaders().getHeaderNames()) {
headers.put(header.toString(), new ArrayList<String>(exchange.getRequestHeaders().get(header)));
}
return Collections.unmodifiableMap(headers);
}
@Override
public String getResponseHeader(final String headerName) {
return exchange.getResponseHeaders().getFirst(HttpString.tryFromString(headerName));
}
@Override
public Map<String, List<String>> getResponseHeaders() {
Map<String, List<String>> headers = new HashMap<String, List<String>>();
for (final HttpString header : exchange.getResponseHeaders().getHeaderNames()) {
headers.put(header.toString(), new ArrayList<String>(exchange.getResponseHeaders().get(header)));
}
return Collections.unmodifiableMap(headers);
}
@Override
public void setResponseHeaders(final Map<String, List<String>> headers) {
HeaderMap map = exchange.getRequestHeaders();
map.clear();
for (Map.Entry<String, List<String>> header : headers.entrySet()) {
map.addAll(HttpString.tryFromString(header.getKey()), header.getValue());
}
}
@Override
public void setResponseHeader(final String headerName, final String headerValue) {
exchange.getResponseHeaders().put(HttpString.tryFromString(headerName), headerValue);
}
@Override
public void setResponesCode(final int code) {
exchange.setResponseCode(code);
}
@Override
public void upgradeChannel(final UpgradeCallback upgradeCallback) {
exchange.upgradeChannel(new ExchangeCompletionListener() {
@Override
public void exchangeEvent(final HttpServerExchange exchange, final NextListener nextListener) {
upgradeCallback.handleUpgrade(exchange.getConnection().getChannel(), exchange.getConnection().getBufferPool());
}
});
}
@Override
public IoFuture<Void> sendData(final ByteBuffer data) {
if (sender == null) {
this.sender = exchange.getResponseSender();
}
final FutureResult<Void> future = new FutureResult<Void>();
sender.send(data, new IoCallback() {
@Override
public void onComplete(final HttpServerExchange exchange, final Sender sender) {
future.setResult(null);
}
@Override
public void onException(final HttpServerExchange exchange, final Sender sender, final IOException exception) {
UndertowLogger.REQUEST_IO_LOGGER.ioException(exception);
future.setException(exception);
}
});
return future.getIoFuture();
}
@Override
public IoFuture<byte[]> readRequestData() {
final ByteArrayOutputStream data = new ByteArrayOutputStream();
final Pooled<ByteBuffer> pooled = exchange.getConnection().getBufferPool().allocate();
final ByteBuffer buffer = pooled.getResource();
final StreamSourceChannel channel = exchange.getRequestChannel();
int res;
for (; ; ) {
try {
res = channel.read(buffer);
if (res == -1) {
return new FinishedIoFuture<byte[]>(data.toByteArray());
} else if (res == 0) {
//callback
final FutureResult<byte[]> future = new FutureResult<byte[]>();
channel.getReadSetter().set(new ChannelListener<StreamSourceChannel>() {
@Override
public void handleEvent(final StreamSourceChannel channel) {
int res;
try {
res = channel.read(buffer);
if (res == -1) {
future.setResult(data.toByteArray());
channel.suspendReads();
return;
} else if (res == 0) {
return;
} else {
buffer.flip();
while (buffer.hasRemaining()) {
data.write(buffer.get());
}
buffer.clear();
}
} catch (IOException e) {
future.setException(e);
}
}
});
channel.resumeReads();
return future.getIoFuture();
} else {
buffer.flip();
while (buffer.hasRemaining()) {
data.write(buffer.get());
}
buffer.clear();
}
} catch (IOException e) {
final FutureResult<byte[]> future = new FutureResult<byte[]>();
future.setException(e);
return future.getIoFuture();
}
}
}
@Override
public void endExchange() {
exchange.endExchange();
}
@Override
public void close() {
try {
exchange.endExchange();
} finally {
IoUtils.safeClose(exchange.getConnection());
}
}
@Override
public String getRequestScheme() {
return exchange.getRequestScheme();
}
@Override
public String getRequestURI() {
return exchange.getRequestURI();
}
@Override
public Pool<ByteBuffer> getBufferPool() {
return exchange.getConnection().getBufferPool();
}
@Override
public String getQueryString() {
return exchange.getQueryString();
}
@Override
public Object getSession() {
return null;
}
}