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[release-branch.go1.15] net/http: deep copy Request.TransferEncoding

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The existing implementation in Request.Clone() assigns the wrong
pointer to r2.TransferEncoding.

Updates #41907.
Fixes #41914.

Change-Id: I7f220a41b1b46a55d1a1005e47c6dd69478cb025
Reviewed-on: https://go-review.googlesource.com/c/go/+/261378
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Carlos Amedee <carlos@golang.org>
Trust: Emmanuel Odeke <emm.odeke@gmail.com>
This commit is contained in:
dqu123 2020-10-10 16:25:07 -04:00 committed by Carlos Amedee
parent f68af196a3
commit 1a05c910fb
2 changed files with 22 additions and 1 deletions
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2
src/net/http/request.go
View File

@ -382,7 +382,7 @@ func (r *Request) Clone(ctx context.Context) *Request {
if s := r.TransferEncoding; s != nil {
s2 := make([]string, len(s))
copy(s2, s)
r2.TransferEncoding = s
r2.TransferEncoding = s2
}
r2.Form = cloneURLValues(r.Form)
r2.PostForm = cloneURLValues(r.PostForm)

21
src/net/http/request_test.go
View File

@ -828,6 +828,27 @@ func TestWithContextDeepCopiesURL(t *testing.T) {
}
}
// Ensure that Request.Clone creates a deep copy of TransferEncoding.
// See issue 41907.
func TestRequestCloneTransferEncoding(t *testing.T) {
body := strings.NewReader("body")
req, _ := NewRequest("POST", "https://example.org/", body)
req.TransferEncoding = []string{
"encoding1",
}
clonedReq := req.Clone(context.Background())
// modify original after deep copy
req.TransferEncoding[0] = "encoding2"
if req.TransferEncoding[0] != "encoding2" {
t.Error("expected req.TransferEncoding to be changed")
}
if clonedReq.TransferEncoding[0] != "encoding1" {
t.Error("expected clonedReq.TransferEncoding to be unchanged")
}
}
func TestNoPanicOnRoundTripWithBasicAuth_h1(t *testing.T) {
testNoPanicWithBasicAuth(t, h1Mode)
}