org.springframework.http.client.SimpleBufferingClientHttpRequest Maven / Gradle / Ivy
/*
* Copyright 2002-2018 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.client;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URI;
import java.net.URISyntaxException;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.util.FileCopyUtils;
import org.springframework.util.StringUtils;
/**
* {@link ClientHttpRequest} implementation that uses standard JDK facilities to
* execute buffered requests. Created via the {@link SimpleClientHttpRequestFactory}.
*
* @author Arjen Poutsma
* @author Juergen Hoeller
* @since 3.0
* @see SimpleClientHttpRequestFactory#createRequest(java.net.URI, HttpMethod)
*/
final class SimpleBufferingClientHttpRequest extends AbstractBufferingClientHttpRequest {
private final HttpURLConnection connection;
private final boolean outputStreaming;
SimpleBufferingClientHttpRequest(HttpURLConnection connection, boolean outputStreaming) {
this.connection = connection;
this.outputStreaming = outputStreaming;
}
@Override
public String getMethodValue() {
return this.connection.getRequestMethod();
}
@Override
public URI getURI() {
try {
return this.connection.getURL().toURI();
}
catch (URISyntaxException ex) {
throw new IllegalStateException("Could not get HttpURLConnection URI: " + ex.getMessage(), ex);
}
}
@Override
protected ClientHttpResponse executeInternal(HttpHeaders headers, byte[] bufferedOutput) throws IOException {
addHeaders(this.connection, headers);
// JDK <1.8 doesn't support getOutputStream with HTTP DELETE
if (getMethod() == HttpMethod.DELETE && bufferedOutput.length == 0) {
this.connection.setDoOutput(false);
}
if (this.connection.getDoOutput() && this.outputStreaming) {
this.connection.setFixedLengthStreamingMode(bufferedOutput.length);
}
this.connection.connect();
if (this.connection.getDoOutput()) {
FileCopyUtils.copy(bufferedOutput, this.connection.getOutputStream());
}
else {
// Immediately trigger the request in a no-output scenario as well
this.connection.getResponseCode();
}
return new SimpleClientHttpResponse(this.connection);
}
/**
* Add the given headers to the given HTTP connection.
* @param connection the connection to add the headers to
* @param headers the headers to add
*/
static void addHeaders(HttpURLConnection connection, HttpHeaders headers) {
String method = connection.getRequestMethod();
if (method.equals("PUT") || method.equals("DELETE")) {
if (!StringUtils.hasText(headers.getFirst(HttpHeaders.ACCEPT))) {
// Avoid "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2"
// from HttpUrlConnection which prevents JSON error response details.
headers.set(HttpHeaders.ACCEPT, "*/*");
}
}
headers.forEach((headerName, headerValues) -> {
if (HttpHeaders.COOKIE.equalsIgnoreCase(headerName)) { // RFC 6265
String headerValue = StringUtils.collectionToDelimitedString(headerValues, "; ");
connection.setRequestProperty(headerName, headerValue);
}
else {
for (String headerValue : headerValues) {
String actualHeaderValue = headerValue != null ? headerValue : "";
connection.addRequestProperty(headerName, actualHeaderValue);
}
}
});
}
}