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Retrieve cached response body in a thread-safe manner

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Closes gh-35745
This commit is contained in:
Juergen Hoeller
2025-11-02 20:40:02 +01:00
parent a33027703d
commit 4b7cf85d71
1 changed files with 12 additions and 4 deletions
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spring-web/src/main/java/org/springframework/http/client/BufferingClientHttpResponseWrapper.java
+12 -4
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@@ -30,6 +30,7 @@ import org.springframework.util.StreamUtils;
* into memory, thus allowing for multiple invocations of {@link #getBody()}.
*
* @author Arjen Poutsma
* @author Juergen Hoeller
* @since 3.1
*/
final class BufferingClientHttpResponseWrapper implements ClientHttpResponse {
@@ -37,7 +38,7 @@ final class BufferingClientHttpResponseWrapper implements ClientHttpResponse {
private final ClientHttpResponse response;
@Nullable
private byte[] body;
private volatile byte[] body;
BufferingClientHttpResponseWrapper(ClientHttpResponse response) {
@@ -62,10 +63,17 @@ final class BufferingClientHttpResponseWrapper implements ClientHttpResponse {
@Override
public InputStream getBody() throws IOException {
if (this.body == null) {
this.body = StreamUtils.copyToByteArray(this.response.getBody());
byte[] body = this.body;
if (body == null) {
synchronized (this) {
body = this.body;
if (body == null) {
body = StreamUtils.copyToByteArray(this.response.getBody());
this.body = body;
}
}
}
return new ByteArrayInputStream(this.body);
return new ByteArrayInputStream(body);
}
@Override