| // ======================================================================== |
| // Copyright (c) 2006-2009 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| |
| package org.eclipse.jetty.client; |
| |
| import java.io.EOFException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InterruptedIOException; |
| import java.util.Collections; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| |
| import org.eclipse.jetty.client.security.Authentication; |
| import org.eclipse.jetty.http.HttpFields; |
| import org.eclipse.jetty.http.HttpGenerator; |
| import org.eclipse.jetty.http.HttpHeaderValues; |
| import org.eclipse.jetty.http.HttpHeaders; |
| import org.eclipse.jetty.http.HttpMethods; |
| import org.eclipse.jetty.http.HttpParser; |
| import org.eclipse.jetty.http.HttpSchemes; |
| import org.eclipse.jetty.http.HttpStatus; |
| import org.eclipse.jetty.http.HttpVersions; |
| import org.eclipse.jetty.io.AbstractConnection; |
| import org.eclipse.jetty.io.AsyncEndPoint; |
| import org.eclipse.jetty.io.Buffer; |
| import org.eclipse.jetty.io.Buffers; |
| import org.eclipse.jetty.io.ByteArrayBuffer; |
| import org.eclipse.jetty.io.Connection; |
| import org.eclipse.jetty.io.EndPoint; |
| import org.eclipse.jetty.io.View; |
| import org.eclipse.jetty.io.nio.SslSelectChannelEndPoint; |
| import org.eclipse.jetty.util.component.AggregateLifeCycle; |
| import org.eclipse.jetty.util.component.Dumpable; |
| import org.eclipse.jetty.util.log.Log; |
| import org.eclipse.jetty.util.log.Logger; |
| import org.eclipse.jetty.util.thread.Timeout; |
| |
| /** |
| * |
| * @version $Revision: 879 $ $Date: 2009-09-11 16:13:28 +0200 (Fri, 11 Sep 2009) $ |
| */ |
| public class HttpConnection extends AbstractConnection implements Dumpable |
| { |
| private static final Logger LOG = Log.getLogger(HttpConnection.class); |
| |
| private HttpDestination _destination; |
| private HttpGenerator _generator; |
| private HttpParser _parser; |
| private boolean _http11 = true; |
| private int _status; |
| private Buffer _connectionHeader; |
| private Buffer _requestContentChunk; |
| private boolean _requestComplete; |
| private boolean _reserved; |
| |
| // The current exchange waiting for a response |
| private volatile HttpExchange _exchange; |
| private HttpExchange _pipeline; |
| private final Timeout.Task _idleTimeout = new ConnectionIdleTask(); |
| private AtomicBoolean _idle = new AtomicBoolean(false); |
| |
| |
| HttpConnection(Buffers requestBuffers, Buffers responseBuffers, EndPoint endp) |
| { |
| super(endp); |
| |
| _generator = new HttpGenerator(requestBuffers,endp); |
| _parser = new HttpParser(responseBuffers,endp,new Handler()); |
| } |
| |
| public void setReserved (boolean reserved) |
| { |
| _reserved = reserved; |
| } |
| |
| public boolean isReserved() |
| { |
| return _reserved; |
| } |
| |
| public HttpDestination getDestination() |
| { |
| return _destination; |
| } |
| |
| public void setDestination(HttpDestination destination) |
| { |
| _destination = destination; |
| } |
| |
| public boolean send(HttpExchange ex) throws IOException |
| { |
| synchronized (this) |
| { |
| if (_exchange != null) |
| { |
| if (_pipeline != null) |
| throw new IllegalStateException(this + " PIPELINED!!! _exchange=" + _exchange); |
| _pipeline = ex; |
| return true; |
| } |
| |
| _exchange = ex; |
| _exchange.associate(this); |
| |
| // The call to associate() may have closed the connection, check if it's the case |
| if (!_endp.isOpen()) |
| { |
| _exchange.disassociate(); |
| _exchange = null; |
| return false; |
| } |
| |
| _exchange.setStatus(HttpExchange.STATUS_WAITING_FOR_COMMIT); |
| |
| if (_endp.isBlocking()) |
| { |
| this.notify(); |
| } |
| else |
| { |
| AsyncEndPoint scep = (AsyncEndPoint)_endp; |
| scep.scheduleWrite(); |
| } |
| |
| adjustIdleTimeout(); |
| |
| return true; |
| } |
| } |
| |
| private void adjustIdleTimeout() throws IOException |
| { |
| // Adjusts the idle timeout in case the default or exchange timeout |
| // are greater. This is needed for long polls, where one wants an |
| // aggressive releasing of idle connections (so idle timeout is small) |
| // but still allow long polls to complete normally |
| |
| long timeout = _exchange.getTimeout(); |
| if (timeout <= 0) |
| timeout = _destination.getHttpClient().getTimeout(); |
| |
| long endPointTimeout = _endp.getMaxIdleTime(); |
| |
| if (timeout > 0 && timeout > endPointTimeout) |
| { |
| // Make it larger than the exchange timeout so that there are |
| // no races between the idle timeout and the exchange timeout |
| // when trying to close the endpoint |
| _endp.setMaxIdleTime(2 * (int)timeout); |
| } |
| } |
| |
| public Connection handle() throws IOException |
| { |
| try |
| { |
| int no_progress = 0; |
| |
| boolean failed = false; |
| while (_endp.isBufferingInput() || _endp.isOpen()) |
| { |
| synchronized (this) |
| { |
| while (_exchange == null) |
| { |
| if (_endp.isBlocking()) |
| { |
| try |
| { |
| this.wait(); |
| } |
| catch (InterruptedException e) |
| { |
| throw new InterruptedIOException(); |
| } |
| } |
| else |
| { |
| long filled = _parser.fill(); |
| if (filled < 0) |
| { |
| close(); |
| } |
| else |
| { |
| // Hopefully just space? |
| _parser.skipCRLF(); |
| if (_parser.isMoreInBuffer()) |
| { |
| LOG.warn("Unexpected data received but no request sent"); |
| close(); |
| } |
| } |
| return this; |
| } |
| } |
| } |
| |
| try |
| { |
| if (_exchange.getStatus() == HttpExchange.STATUS_WAITING_FOR_COMMIT) |
| { |
| no_progress = 0; |
| commitRequest(); |
| } |
| |
| long io = 0; |
| _endp.flush(); |
| |
| if (_generator.isComplete()) |
| { |
| if (!_requestComplete) |
| { |
| _requestComplete = true; |
| _exchange.getEventListener().onRequestComplete(); |
| } |
| } |
| else |
| { |
| // Write as much of the request as possible |
| synchronized (this) |
| { |
| if (_exchange == null) |
| continue; |
| } |
| |
| long flushed = _generator.flushBuffer(); |
| io += flushed; |
| |
| if (!_generator.isComplete()) |
| { |
| if (_exchange!=null) |
| { |
| InputStream in = _exchange.getRequestContentSource(); |
| if (in != null) |
| { |
| if (_requestContentChunk == null || _requestContentChunk.length() == 0) |
| { |
| _requestContentChunk = _exchange.getRequestContentChunk(); |
| |
| if (_requestContentChunk != null) |
| _generator.addContent(_requestContentChunk,false); |
| else |
| _generator.complete(); |
| |
| flushed = _generator.flushBuffer(); |
| io += flushed; |
| } |
| } |
| else |
| _generator.complete(); |
| } |
| else |
| _generator.complete(); |
| } |
| } |
| |
| if (_generator.isComplete() && !_requestComplete) |
| { |
| _requestComplete = true; |
| _exchange.getEventListener().onRequestComplete(); |
| } |
| |
| // If we are not ended then parse available |
| if (!_parser.isComplete() && (_generator.isComplete() || _generator.isCommitted() && !_endp.isBlocking())) |
| { |
| long filled = _parser.parseAvailable(); |
| io += filled; |
| } |
| |
| if (io > 0) |
| no_progress = 0; |
| else if (no_progress++ >= 1 && !_endp.isBlocking()) |
| { |
| // SSL may need an extra flush as it may have made "no progress" while actually doing a handshake. |
| if (_endp instanceof SslSelectChannelEndPoint && !_generator.isComplete() && !_generator.isEmpty()) |
| { |
| long flushed = _generator.flushBuffer(); |
| if (flushed>0) |
| continue; |
| } |
| return this; |
| } |
| } |
| catch (Throwable e) |
| { |
| LOG.debug("Failure on " + _exchange, e); |
| |
| if (e instanceof ThreadDeath) |
| throw (ThreadDeath)e; |
| |
| failed = true; |
| |
| synchronized (this) |
| { |
| if (_exchange != null) |
| { |
| // Cancelling the exchange causes an exception as we close the connection, |
| // but we don't report it as it is normal cancelling operation |
| if (_exchange.getStatus() != HttpExchange.STATUS_CANCELLING && |
| _exchange.getStatus() != HttpExchange.STATUS_CANCELLED) |
| { |
| _exchange.setStatus(HttpExchange.STATUS_EXCEPTED); |
| _exchange.getEventListener().onException(e); |
| } |
| } |
| else |
| { |
| if (e instanceof IOException) |
| throw (IOException)e; |
| |
| if (e instanceof Error) |
| throw (Error)e; |
| |
| if (e instanceof RuntimeException) |
| throw (RuntimeException)e; |
| |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| finally |
| { |
| boolean complete = false; |
| boolean close = failed; // always close the connection on error |
| if (!failed) |
| { |
| // are we complete? |
| if (_generator.isComplete()) |
| { |
| if (!_requestComplete) |
| { |
| _requestComplete = true; |
| _exchange.getEventListener().onRequestComplete(); |
| } |
| |
| // we need to return the HttpConnection to a state that |
| // it can be reused or closed out |
| if (_parser.isComplete()) |
| { |
| _exchange.cancelTimeout(_destination.getHttpClient()); |
| complete = true; |
| } |
| } |
| } |
| |
| if (_generator.isComplete() && !_parser.isComplete()) |
| { |
| if (!_endp.isOpen() || _endp.isInputShutdown()) |
| { |
| complete=true; |
| close=true; |
| close(); |
| } |
| } |
| |
| if (complete || failed) |
| { |
| synchronized (this) |
| { |
| if (!close) |
| close = shouldClose(); |
| |
| reset(true); |
| |
| no_progress = 0; |
| if (_exchange != null) |
| { |
| HttpExchange exchange=_exchange; |
| _exchange = null; |
| |
| // Reset the maxIdleTime because it may have been changed |
| if (!close) |
| _endp.setMaxIdleTime((int)_destination.getHttpClient().getIdleTimeout()); |
| |
| if (_status==HttpStatus.SWITCHING_PROTOCOLS_101) |
| { |
| Connection switched=exchange.onSwitchProtocol(_endp); |
| if (switched!=null) |
| { |
| // switched protocol! |
| exchange = _pipeline; |
| _pipeline = null; |
| if (exchange!=null) |
| _destination.send(exchange); |
| |
| return switched; |
| } |
| } |
| |
| if (_pipeline == null) |
| { |
| if (!isReserved()) |
| _destination.returnConnection(this, close); |
| } |
| else |
| { |
| if (close) |
| { |
| if (!isReserved()) |
| _destination.returnConnection(this,close); |
| |
| exchange = _pipeline; |
| _pipeline = null; |
| _destination.send(exchange); |
| } |
| else |
| { |
| exchange = _pipeline; |
| _pipeline = null; |
| send(exchange); |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| finally |
| { |
| _parser.returnBuffers(); |
| |
| // Do we have more stuff to write? |
| if (!_generator.isComplete() && _generator.getBytesBuffered()>0 && _endp instanceof AsyncEndPoint) |
| { |
| // Assume we are write blocked! |
| ((AsyncEndPoint)_endp).scheduleWrite(); |
| } |
| } |
| |
| return this; |
| } |
| |
| public boolean isIdle() |
| { |
| synchronized (this) |
| { |
| return _exchange == null; |
| } |
| } |
| |
| public boolean isSuspended() |
| { |
| return false; |
| } |
| |
| public void closed() |
| { |
| } |
| |
| private void commitRequest() throws IOException |
| { |
| synchronized (this) |
| { |
| _status=0; |
| if (_exchange.getStatus() != HttpExchange.STATUS_WAITING_FOR_COMMIT) |
| throw new IllegalStateException(); |
| |
| _exchange.setStatus(HttpExchange.STATUS_SENDING_REQUEST); |
| _generator.setVersion(_exchange.getVersion()); |
| |
| String method=_exchange.getMethod(); |
| String uri = _exchange.getURI(); |
| if (_destination.isProxied() && !HttpMethods.CONNECT.equals(method) && uri.startsWith("/")) |
| { |
| boolean secure = _destination.isSecure(); |
| String host = _destination.getAddress().getHost(); |
| int port = _destination.getAddress().getPort(); |
| StringBuilder absoluteURI = new StringBuilder(); |
| absoluteURI.append(secure ? HttpSchemes.HTTPS : HttpSchemes.HTTP); |
| absoluteURI.append("://"); |
| absoluteURI.append(host); |
| // Avoid adding default ports |
| if (!(secure && port == 443 || !secure && port == 80)) |
| absoluteURI.append(":").append(port); |
| absoluteURI.append(uri); |
| uri = absoluteURI.toString(); |
| Authentication auth = _destination.getProxyAuthentication(); |
| if (auth != null) |
| auth.setCredentials(_exchange); |
| } |
| |
| _generator.setRequest(method, uri); |
| _parser.setHeadResponse(HttpMethods.HEAD.equalsIgnoreCase(method)); |
| |
| HttpFields requestHeaders = _exchange.getRequestFields(); |
| if (_exchange.getVersion() >= HttpVersions.HTTP_1_1_ORDINAL) |
| { |
| if (!requestHeaders.containsKey(HttpHeaders.HOST_BUFFER)) |
| requestHeaders.add(HttpHeaders.HOST_BUFFER,_destination.getHostHeader()); |
| } |
| |
| Buffer requestContent = _exchange.getRequestContent(); |
| if (requestContent != null) |
| { |
| requestHeaders.putLongField(HttpHeaders.CONTENT_LENGTH, requestContent.length()); |
| _generator.completeHeader(requestHeaders,false); |
| _generator.addContent(new View(requestContent),true); |
| } |
| else |
| { |
| InputStream requestContentStream = _exchange.getRequestContentSource(); |
| if (requestContentStream != null) |
| { |
| _generator.completeHeader(requestHeaders, false); |
| int available = requestContentStream.available(); |
| if (available > 0) |
| { |
| // TODO deal with any known content length |
| // TODO reuse this buffer! |
| byte[] buf = new byte[available]; |
| int length = requestContentStream.read(buf); |
| _generator.addContent(new ByteArrayBuffer(buf, 0, length), false); |
| } |
| } |
| else |
| { |
| requestHeaders.remove(HttpHeaders.CONTENT_LENGTH); |
| _generator.completeHeader(requestHeaders, true); |
| } |
| } |
| |
| _exchange.setStatus(HttpExchange.STATUS_WAITING_FOR_RESPONSE); |
| } |
| } |
| |
| protected void reset(boolean returnBuffers) throws IOException |
| { |
| _requestComplete = false; |
| _connectionHeader = null; |
| _parser.reset(); |
| if (returnBuffers) |
| _parser.returnBuffers(); |
| _generator.reset(returnBuffers); |
| _http11 = true; |
| } |
| |
| private boolean shouldClose() |
| { |
| if (_connectionHeader!=null) |
| { |
| if (HttpHeaderValues.CLOSE_BUFFER.equals(_connectionHeader)) |
| return true; |
| if (HttpHeaderValues.KEEP_ALIVE_BUFFER.equals(_connectionHeader)) |
| return false; |
| } |
| return !_http11; |
| } |
| |
| private class Handler extends HttpParser.EventHandler |
| { |
| @Override |
| public void startRequest(Buffer method, Buffer url, Buffer version) throws IOException |
| { |
| // System.out.println( method.toString() + "///" + url.toString() + |
| // "///" + version.toString() ); |
| // TODO validate this is acceptable, the <!DOCTYPE goop was coming |
| // out here |
| // throw new IllegalStateException(); |
| } |
| |
| @Override |
| public void startResponse(Buffer version, int status, Buffer reason) throws IOException |
| { |
| HttpExchange exchange = _exchange; |
| if (exchange!=null) |
| { |
| switch(status) |
| { |
| case HttpStatus.CONTINUE_100: |
| case HttpStatus.PROCESSING_102: |
| // TODO check if appropriate expect was sent in the request. |
| exchange.setEventListener(new NonFinalResponseListener(exchange)); |
| break; |
| |
| case HttpStatus.OK_200: |
| // handle special case for CONNECT 200 responses |
| if (HttpMethods.CONNECT.equalsIgnoreCase(exchange.getMethod())) |
| _parser.setHeadResponse(true); |
| break; |
| } |
| |
| _http11 = HttpVersions.HTTP_1_1_BUFFER.equals(version); |
| _status=status; |
| exchange.getEventListener().onResponseStatus(version,status,reason); |
| exchange.setStatus(HttpExchange.STATUS_PARSING_HEADERS); |
| } |
| } |
| |
| @Override |
| public void parsedHeader(Buffer name, Buffer value) throws IOException |
| { |
| HttpExchange exchange = _exchange; |
| if (exchange!=null) |
| { |
| if (HttpHeaders.CACHE.getOrdinal(name) == HttpHeaders.CONNECTION_ORDINAL) |
| { |
| _connectionHeader = HttpHeaderValues.CACHE.lookup(value); |
| } |
| exchange.getEventListener().onResponseHeader(name,value); |
| } |
| } |
| |
| @Override |
| public void headerComplete() throws IOException |
| { |
| if (_endp instanceof AsyncEndPoint) |
| ((AsyncEndPoint)_endp).scheduleIdle(); |
| HttpExchange exchange = _exchange; |
| if (exchange!=null) |
| exchange.setStatus(HttpExchange.STATUS_PARSING_CONTENT); |
| } |
| |
| @Override |
| public void content(Buffer ref) throws IOException |
| { |
| if (_endp instanceof AsyncEndPoint) |
| ((AsyncEndPoint)_endp).scheduleIdle(); |
| HttpExchange exchange = _exchange; |
| if (exchange!=null) |
| exchange.getEventListener().onResponseContent(ref); |
| } |
| |
| @Override |
| public void messageComplete(long contextLength) throws IOException |
| { |
| HttpExchange exchange = _exchange; |
| if (exchange!=null) |
| exchange.setStatus(HttpExchange.STATUS_COMPLETED); |
| } |
| } |
| |
| @Override |
| public String toString() |
| { |
| return "HttpConnection@" + hashCode() + "//" + _destination.getAddress().getHost() + ":" + _destination.getAddress().getPort(); |
| } |
| |
| public String toDetailString() |
| { |
| return toString() + " ex=" + _exchange + " idle for " + _idleTimeout.getAge(); |
| } |
| |
| public void close() throws IOException |
| { |
| //if there is a live, unfinished exchange, set its status to be |
| //excepted and wake up anyone waiting on waitForDone() |
| |
| HttpExchange exchange = _exchange; |
| if (exchange != null && !exchange.isDone()) |
| { |
| switch (exchange.getStatus()) |
| { |
| case HttpExchange.STATUS_CANCELLED: |
| case HttpExchange.STATUS_CANCELLING: |
| case HttpExchange.STATUS_COMPLETED: |
| case HttpExchange.STATUS_EXCEPTED: |
| case HttpExchange.STATUS_EXPIRED: |
| break; |
| default: |
| String exch= exchange.toString(); |
| String reason = _endp.isOpen()?(_endp.isInputShutdown()?"half closed: ":"local close: "):"closed: "; |
| exchange.setStatus(HttpExchange.STATUS_EXCEPTED); |
| exchange.getEventListener().onException(new EOFException(reason+exch)); |
| } |
| } |
| |
| _endp.close(); |
| } |
| |
| public void setIdleTimeout() |
| { |
| synchronized (this) |
| { |
| if (_idle.compareAndSet(false, true)) |
| _destination.getHttpClient().scheduleIdle(_idleTimeout); |
| else |
| throw new IllegalStateException(); |
| } |
| } |
| |
| public boolean cancelIdleTimeout() |
| { |
| synchronized (this) |
| { |
| if (_idle.compareAndSet(true, false)) |
| { |
| _destination.getHttpClient().cancel(_idleTimeout); |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| protected void exchangeExpired(HttpExchange exchange) |
| { |
| synchronized (this) |
| { |
| // We are expiring an exchange, but the exchange is pending |
| // Cannot reuse the connection because the reply may arrive, so close it |
| if (_exchange == exchange) |
| { |
| try |
| { |
| _destination.returnConnection(this, true); |
| } |
| catch (IOException x) |
| { |
| LOG.ignore(x); |
| } |
| } |
| } |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * @see org.eclipse.jetty.util.component.Dumpable#dump() |
| */ |
| public String dump() |
| { |
| return AggregateLifeCycle.dump(this); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| /** |
| * @see org.eclipse.jetty.util.component.Dumpable#dump(java.lang.Appendable, java.lang.String) |
| */ |
| public void dump(Appendable out, String indent) throws IOException |
| { |
| synchronized (this) |
| { |
| out.append(String.valueOf(this)).append("\n"); |
| AggregateLifeCycle.dump(out,indent,Collections.singletonList(_endp)); |
| } |
| } |
| |
| /* ------------------------------------------------------------ */ |
| private class ConnectionIdleTask extends Timeout.Task |
| { |
| /* ------------------------------------------------------------ */ |
| @Override |
| public void expired() |
| { |
| // Connection idle, close it |
| if (_idle.compareAndSet(true, false)) |
| { |
| _destination.returnIdleConnection(HttpConnection.this); |
| } |
| } |
| } |
| |
| |
| /* ------------------------------------------------------------ */ |
| private class NonFinalResponseListener implements HttpEventListener |
| { |
| final HttpExchange _exchange; |
| final HttpEventListener _next; |
| |
| /* ------------------------------------------------------------ */ |
| public NonFinalResponseListener(HttpExchange exchange) |
| { |
| _exchange=exchange; |
| _next=exchange.getEventListener(); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public void onRequestCommitted() throws IOException |
| { |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public void onRequestComplete() throws IOException |
| { |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public void onResponseStatus(Buffer version, int status, Buffer reason) throws IOException |
| { |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public void onResponseHeader(Buffer name, Buffer value) throws IOException |
| { |
| _next.onResponseHeader(name,value); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public void onResponseHeaderComplete() throws IOException |
| { |
| _next.onResponseHeaderComplete(); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public void onResponseContent(Buffer content) throws IOException |
| { |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public void onResponseComplete() throws IOException |
| { |
| _exchange.setEventListener(_next); |
| _exchange.setStatus(HttpExchange.STATUS_WAITING_FOR_RESPONSE); |
| _parser.reset(); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public void onConnectionFailed(Throwable ex) |
| { |
| _exchange.setEventListener(_next); |
| _next.onConnectionFailed(ex); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public void onException(Throwable ex) |
| { |
| _exchange.setEventListener(_next); |
| _next.onException(ex); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public void onExpire() |
| { |
| _exchange.setEventListener(_next); |
| _next.onExpire(); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public void onRetry() |
| { |
| _exchange.setEventListener(_next); |
| _next.onRetry(); |
| } |
| } |
| } |
