H2FileServerExample.java
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* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.hc.core5.http2.examples;
import java.io.File;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.List;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import org.apache.hc.core5.http.ContentType;
import org.apache.hc.core5.http.EndpointDetails;
import org.apache.hc.core5.http.EntityDetails;
import org.apache.hc.core5.http.Header;
import org.apache.hc.core5.http.HttpConnection;
import org.apache.hc.core5.http.HttpException;
import org.apache.hc.core5.http.HttpRequest;
import org.apache.hc.core5.http.HttpStatus;
import org.apache.hc.core5.http.Message;
import org.apache.hc.core5.http.ProtocolException;
import org.apache.hc.core5.http.URIScheme;
import org.apache.hc.core5.http.impl.bootstrap.HttpAsyncServer;
import org.apache.hc.core5.http.nio.AsyncRequestConsumer;
import org.apache.hc.core5.http.nio.AsyncServerRequestHandler;
import org.apache.hc.core5.http.nio.entity.AsyncEntityProducers;
import org.apache.hc.core5.http.nio.entity.DiscardingEntityConsumer;
import org.apache.hc.core5.http.nio.support.AsyncResponseBuilder;
import org.apache.hc.core5.http.nio.support.BasicRequestConsumer;
import org.apache.hc.core5.http.protocol.HttpContext;
import org.apache.hc.core5.http.protocol.HttpCoreContext;
import org.apache.hc.core5.http2.HttpVersionPolicy;
import org.apache.hc.core5.http2.frame.RawFrame;
import org.apache.hc.core5.http2.impl.nio.H2StreamListener;
import org.apache.hc.core5.http2.impl.nio.bootstrap.H2ServerBootstrap;
import org.apache.hc.core5.io.CloseMode;
import org.apache.hc.core5.reactor.IOReactorConfig;
import org.apache.hc.core5.reactor.ListenerEndpoint;
import org.apache.hc.core5.util.TextUtils;
import org.apache.hc.core5.util.TimeValue;
/**
* Example of asynchronous embedded HTTP/2 file server.
*/
public class H2FileServerExample {
public static void main(final String[] args) throws Exception {
if (args.length < 1) {
System.err.println("Please specify document root directory");
System.exit(1);
}
// Document root directory
final File docRoot = new File(args[0]);
int port = 8080;
if (args.length >= 2) {
port = Integer.parseInt(args[1]);
}
final IOReactorConfig config = IOReactorConfig.custom()
.setSoTimeout(15, TimeUnit.SECONDS)
.setTcpNoDelay(true)
.build();
final HttpAsyncServer server = H2ServerBootstrap.bootstrap()
.setIOReactorConfig(config)
.setVersionPolicy(HttpVersionPolicy.FORCE_HTTP_2)
.setStreamListener(new H2StreamListener() {
@Override
public void onHeaderInput(final HttpConnection connection, final int streamId, final List<? extends Header> headers) {
for (int i = 0; i < headers.size(); i++) {
System.out.println(connection.getRemoteAddress() + " (" + streamId + ") << " + headers.get(i));
}
}
@Override
public void onHeaderOutput(final HttpConnection connection, final int streamId, final List<? extends Header> headers) {
for (int i = 0; i < headers.size(); i++) {
System.out.println(connection.getRemoteAddress() + " (" + streamId + ") >> " + headers.get(i));
}
}
@Override
public void onFrameInput(final HttpConnection connection, final int streamId, final RawFrame frame) {
}
@Override
public void onFrameOutput(final HttpConnection connection, final int streamId, final RawFrame frame) {
}
@Override
public void onInputFlowControl(final HttpConnection connection, final int streamId, final int delta, final int actualSize) {
}
@Override
public void onOutputFlowControl(final HttpConnection connection, final int streamId, final int delta, final int actualSize) {
}
})
.register("*", new AsyncServerRequestHandler<Message<HttpRequest, Void>>() {
@Override
public AsyncRequestConsumer<Message<HttpRequest, Void>> prepare(
final HttpRequest request,
final EntityDetails entityDetails,
final HttpContext context) throws HttpException {
return new BasicRequestConsumer<>(entityDetails != null ? new DiscardingEntityConsumer<>() : null);
}
@Override
public void handle(
final Message<HttpRequest, Void> message,
final ResponseTrigger responseTrigger,
final HttpContext localContext) throws HttpException, IOException {
final HttpCoreContext context = HttpCoreContext.cast(localContext);
final HttpRequest request = message.getHead();
final URI requestUri;
try {
requestUri = request.getUri();
} catch (final URISyntaxException ex) {
throw new ProtocolException(ex.getMessage(), ex);
}
final String path = requestUri.getPath();
final File file = new File(docRoot, path);
if (!file.exists()) {
System.out.println("File " + file.getPath() + " not found");
responseTrigger.submitResponse(
AsyncResponseBuilder.create(HttpStatus.SC_NOT_FOUND)
.setEntity("<html><body><h1>File" + file.getPath() +
" not found</h1></body></html>", ContentType.TEXT_HTML)
.build(),
context);
} else if (!file.canRead() || file.isDirectory()) {
System.out.println("Cannot read file " + file.getPath());
responseTrigger.submitResponse(
AsyncResponseBuilder.create(HttpStatus.SC_FORBIDDEN)
.setEntity("<html><body><h1>Access denied</h1></body></html>", ContentType.TEXT_HTML)
.build(),
context);
} else {
final ContentType contentType;
final String filename = TextUtils.toLowerCase(file.getName());
if (filename.endsWith(".txt")) {
contentType = ContentType.TEXT_PLAIN;
} else if (filename.endsWith(".html") || filename.endsWith(".htm")) {
contentType = ContentType.TEXT_HTML;
} else if (filename.endsWith(".xml")) {
contentType = ContentType.TEXT_XML;
} else {
contentType = ContentType.DEFAULT_BINARY;
}
final EndpointDetails endpoint = context.getEndpointDetails();
System.out.println(endpoint + ": serving file " + file.getPath());
responseTrigger.submitResponse(
AsyncResponseBuilder.create(HttpStatus.SC_OK)
.setEntity(AsyncEntityProducers.create(file, contentType))
.build(),
context);
}
}
})
.create();
Runtime.getRuntime().addShutdownHook(new Thread(() -> {
System.out.println("HTTP server shutting down");
server.close(CloseMode.GRACEFUL);
}));
server.start();
final Future<ListenerEndpoint> future = server.listen(new InetSocketAddress(port), URIScheme.HTTP);
final ListenerEndpoint listenerEndpoint = future.get();
System.out.print("Listening on " + listenerEndpoint.getAddress());
server.awaitShutdown(TimeValue.ofDays(Long.MAX_VALUE));
}
}