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doc/go1.13: document net/http.Transport.Request.Body unfurling

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Documents the work from:
* CL 163599
* CL 163737

which now uses the Request.Body's io.ReaderFrom implementation,
if available, and permits system level optimizations such as
"sendfile" to be used to transmit/upload the Body, which greatly
speeds up file uploads.

Updates #33396

Change-Id: I7b8315c4b3e57ad47bb9be2b0c838857875d4bd5
Reviewed-on: https://go-review.googlesource.com/c/go/+/188457
Reviewed-by: Andrew Bonventre <andybons@golang.org>
This commit is contained in:
Emmanuel T Odeke 2019-07-31 18:14:56 -07:00 committed by Emmanuel Odeke
parent 0e54d28ff7
commit bdea352b96
1 changed files with 5 additions and 0 deletions
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@ -740,6 +740,11 @@ godoc
The <code>StatusCode</code> <code>103</code> <code>"Early Hints"</code> has been added.
</p>
<p><!-- CL 163599 -->
<a href="/pkg/net/http/#Transport"><code>Transport</code></a> now uses the <a href="/pkg/net/http/#Request.Body"><code>Request.Body</code></a>'s
<a href="/pkg/io/#ReaderFrom"><code>io.ReaderFrom</code></a> implementation if available, to optimize writing the body.
</p>
<p><!-- CL 167017 -->
On encountering unsupported transfer-encodings, <a href="/pkg/net/http/#Server"><code>http.Server</code></a> now
returns a "501 Unimplemented" status as mandated by the HTTP specification <a href="https://tools.ietf.org/html/rfc7230#section-3.3.1">RFC 7230 Section 3.3.1</a>.