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Update StreamUtils drain and emptyInput to use JDK builtins

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Update StreamUtils.drain to use InputStream.transferTo with a null
OutputStream. This avoids allocating buffers for cases where the
supplied InputStream has an optimized transferTo method (e.g.,
ByteArrayInputStream and FileInputStream).

Additionally, update StreamUtils.emptyInput to simply call
InputStream.nullInputStream.

Closes gh-28961
This commit is contained in:
Patrick Strawderman
2022-08-13 14:32:55 -07:00
committed by Brian Clozel
parent 7642ac82f6
commit d4a74c8f9d
2 changed files with 9 additions and 13 deletions
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6
spring-web/src/test/java/org/springframework/http/client/SimpleClientHttpResponseTests.java
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@@ -28,6 +28,7 @@ import org.springframework.util.StreamUtils;
import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyInt;
import static org.mockito.BDDMockito.given;
import static org.mockito.BDDMockito.willDoNothing;
import static org.mockito.Mockito.mock;
@@ -99,7 +100,10 @@ public class SimpleClientHttpResponseTests {
InputStream is = mock(InputStream.class);
given(this.connection.getErrorStream()).willReturn(is);
willDoNothing().given(is).close();
given(is.read(any())).willThrow(new NullPointerException("from HttpURLConnection#ErrorStream"));
given(is.transferTo(any())).willCallRealMethod();
given(is.read(any(), anyInt(), anyInt())).willThrow(new NullPointerException("from HttpURLConnection#ErrorStream"));
is.readAllBytes();
InputStream responseStream = this.response.getBody();
responseStream.close();