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org.springframework.http.server.reactive.JettyHttpHandlerAdapter Maven / Gradle / Ivy
/*
* Copyright 2002-2021 the original author or authors.
*
* Licensed 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
*
* https://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.
*/
package org.springframework.http.server.reactive;
import java.io.IOException;
import java.net.URISyntaxException;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import javax.servlet.AsyncContext;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.http.HttpFields;
import org.eclipse.jetty.server.HttpOutput;
import org.eclipse.jetty.server.Request;
import org.eclipse.jetty.server.Response;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.core.io.buffer.DataBufferFactory;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;
import org.springframework.util.MultiValueMap;
/**
* {@link ServletHttpHandlerAdapter} extension that uses Jetty APIs for writing
* to the response with {@link ByteBuffer}.
*
* @author Violeta Georgieva
* @author Brian Clozel
* @since 5.0
* @see org.springframework.web.server.adapter.AbstractReactiveWebInitializer
*/
public class JettyHttpHandlerAdapter extends ServletHttpHandlerAdapter {
private static final boolean jetty10Present = ClassUtils.isPresent(
"org.eclipse.jetty.http.CookieCutter", JettyHttpHandlerAdapter.class.getClassLoader());
public JettyHttpHandlerAdapter(HttpHandler httpHandler) {
super(httpHandler);
}
@Override
protected ServletServerHttpRequest createRequest(HttpServletRequest request, AsyncContext context)
throws IOException, URISyntaxException {
// TODO: need to compile against Jetty 10 to use HttpFields (class->interface)
if (jetty10Present) {
return super.createRequest(request, context);
}
Assert.notNull(getServletPath(), "Servlet path is not initialized");
return new JettyServerHttpRequest(
request, context, getServletPath(), getDataBufferFactory(), getBufferSize());
}
@Override
protected ServletServerHttpResponse createResponse(HttpServletResponse response,
AsyncContext context, ServletServerHttpRequest request) throws IOException {
// TODO: need to compile against Jetty 10 to use HttpFields (class->interface)
if (jetty10Present) {
return new BaseJettyServerHttpResponse(
response, context, getDataBufferFactory(), getBufferSize(), request);
}
else {
return new JettyServerHttpResponse(
response, context, getDataBufferFactory(), getBufferSize(), request);
}
}
private static final class JettyServerHttpRequest extends ServletServerHttpRequest {
JettyServerHttpRequest(HttpServletRequest request, AsyncContext asyncContext,
String servletPath, DataBufferFactory bufferFactory, int bufferSize)
throws IOException, URISyntaxException {
super(createHeaders(request), request, asyncContext, servletPath, bufferFactory, bufferSize);
}
private static MultiValueMap createHeaders(HttpServletRequest request) {
HttpFields fields = ((Request) request).getMetaData().getFields();
return new JettyHeadersAdapter(fields);
}
}
private static class BaseJettyServerHttpResponse extends ServletServerHttpResponse {
BaseJettyServerHttpResponse(HttpServletResponse response, AsyncContext asyncContext,
DataBufferFactory bufferFactory, int bufferSize, ServletServerHttpRequest request)
throws IOException {
super(response, asyncContext, bufferFactory, bufferSize, request);
}
BaseJettyServerHttpResponse(HttpHeaders headers, HttpServletResponse response, AsyncContext asyncContext,
DataBufferFactory bufferFactory, int bufferSize, ServletServerHttpRequest request)
throws IOException {
super(headers, response, asyncContext, bufferFactory, bufferSize, request);
}
@Override
protected int writeToOutputStream(DataBuffer dataBuffer) throws IOException {
ByteBuffer input = dataBuffer.asByteBuffer();
int len = input.remaining();
ServletResponse response = getNativeResponse();
((HttpOutput) response.getOutputStream()).write(input);
return len;
}
}
private static final class JettyServerHttpResponse extends BaseJettyServerHttpResponse {
JettyServerHttpResponse(HttpServletResponse response, AsyncContext asyncContext,
DataBufferFactory bufferFactory, int bufferSize, ServletServerHttpRequest request)
throws IOException {
super(createHeaders(response), response, asyncContext, bufferFactory, bufferSize, request);
}
private static HttpHeaders createHeaders(HttpServletResponse response) {
HttpFields fields = ((Response) response).getHttpFields();
return new HttpHeaders(new JettyHeadersAdapter(fields));
}
@Override
protected void applyHeaders() {
HttpServletResponse response = getNativeResponse();
MediaType contentType = null;
try {
contentType = getHeaders().getContentType();
}
catch (Exception ex) {
String rawContentType = getHeaders().getFirst(HttpHeaders.CONTENT_TYPE);
response.setContentType(rawContentType);
}
if (response.getContentType() == null && contentType != null) {
response.setContentType(contentType.toString());
}
Charset charset = (contentType != null ? contentType.getCharset() : null);
if (response.getCharacterEncoding() == null && charset != null) {
response.setCharacterEncoding(charset.name());
}
long contentLength = getHeaders().getContentLength();
if (contentLength != -1) {
response.setContentLengthLong(contentLength);
}
}
}
}