org.springframework.http.client.HttpComponentsStreamingClientHttpRequest Maven / Gradle / Ivy
/*
* Copyright 2002-2017 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
*
* 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.
*/
package org.springframework.http.client;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;
import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpEntityEnclosingRequest;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.message.BasicHeader;
import org.apache.http.protocol.HttpContext;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.StreamingHttpOutputMessage;
import org.springframework.lang.Nullable;
/**
* {@link ClientHttpRequest} implementation based on
* Apache HttpComponents HttpClient in streaming mode.
*
* Created via the {@link HttpComponentsClientHttpRequestFactory}.
*
* @author Arjen Poutsma
* @since 4.0
* @see HttpComponentsClientHttpRequestFactory#createRequest(java.net.URI, org.springframework.http.HttpMethod)
*/
final class HttpComponentsStreamingClientHttpRequest extends AbstractClientHttpRequest
implements StreamingHttpOutputMessage {
private final HttpClient httpClient;
private final HttpUriRequest httpRequest;
private final HttpContext httpContext;
@Nullable
private Body body;
HttpComponentsStreamingClientHttpRequest(HttpClient client, HttpUriRequest request, HttpContext context) {
this.httpClient = client;
this.httpRequest = request;
this.httpContext = context;
}
@Override
public String getMethodValue() {
return this.httpRequest.getMethod();
}
@Override
public URI getURI() {
return this.httpRequest.getURI();
}
@Override
public void setBody(Body body) {
assertNotExecuted();
this.body = body;
}
@Override
protected OutputStream getBodyInternal(HttpHeaders headers) throws IOException {
throw new UnsupportedOperationException("getBody not supported");
}
@Override
protected ClientHttpResponse executeInternal(HttpHeaders headers) throws IOException {
HttpComponentsClientHttpRequest.addHeaders(this.httpRequest, headers);
if (this.httpRequest instanceof HttpEntityEnclosingRequest && this.body != null) {
HttpEntityEnclosingRequest entityEnclosingRequest = (HttpEntityEnclosingRequest) this.httpRequest;
HttpEntity requestEntity = new StreamingHttpEntity(getHeaders(), this.body);
entityEnclosingRequest.setEntity(requestEntity);
}
HttpResponse httpResponse = this.httpClient.execute(this.httpRequest, this.httpContext);
return new HttpComponentsClientHttpResponse(httpResponse);
}
private static class StreamingHttpEntity implements HttpEntity {
private final HttpHeaders headers;
private final StreamingHttpOutputMessage.Body body;
public StreamingHttpEntity(HttpHeaders headers, StreamingHttpOutputMessage.Body body) {
this.headers = headers;
this.body = body;
}
@Override
public boolean isRepeatable() {
return false;
}
@Override
public boolean isChunked() {
return false;
}
@Override
public long getContentLength() {
return this.headers.getContentLength();
}
@Override
@Nullable
public Header getContentType() {
MediaType contentType = this.headers.getContentType();
return (contentType != null ? new BasicHeader("Content-Type", contentType.toString()) : null);
}
@Override
@Nullable
public Header getContentEncoding() {
String contentEncoding = this.headers.getFirst("Content-Encoding");
return (contentEncoding != null ? new BasicHeader("Content-Encoding", contentEncoding) : null);
}
@Override
public InputStream getContent() throws IOException, IllegalStateException {
throw new IllegalStateException("No content available");
}
@Override
public void writeTo(OutputStream outputStream) throws IOException {
this.body.writeTo(outputStream);
}
@Override
public boolean isStreaming() {
return true;
}
@Override
@Deprecated
public void consumeContent() throws IOException {
throw new UnsupportedOperationException();
}
}
}