Use writeTo() to buffer HttpEntity in httpclient5

[kasmarian]

Description

Use HttpEntity.writeTo() instead of relying on EntityUtils.toByteArray() to copy the OutputStream of the HttpEntity.

Motivation and Context

With a change in Spring Framework 6.1, HttpComponentsClientHttpRequest has an internal class BodyEntity, that is meant to not cache an OutputStream, but to provide a callback, that's used when the OutputStream is required. The getContent() method throws UnsupportedOperationException.

With this change, I'm using the writeTo() method to copy the OutputStream, as for Logbook, buffering the stream is required.

Addresses #1693

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.

[msdousti]

👍

[kasmarian]

👍