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net/http: wrap client errors

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Fixes #50856

Change-Id: I7fe89fcce223e1571debb73436f8aeb3bfbe4b9f
GitHub-Last-Rev: be570e7883be06adbd227a1dfe63a80e384d96f6
GitHub-Pull-Request: golang/go#63448
Reviewed-on: https://go-review.googlesource.com/c/go/+/533119
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-by: qiulaidongfeng <2645477756@qq.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
This commit is contained in:
kayos@tcp.direct 2024-01-08 07:42:00 +00:00 committed by Cherry Mui
parent c51beb4342
commit 67d30fc315
3 changed files with 28 additions and 7 deletions
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4
src/net/http/client.go
View File

@ -726,7 +726,7 @@ func (c *Client) do(req *Request) (retres *Response, reterr error) {
reqBodyClosed = true
if !deadline.IsZero() && didTimeout() {
err = &httpError{
err: err.Error() + " (Client.Timeout exceeded while awaiting headers)",
err: fmt.Errorf("%w (Client.Timeout exceeded while awaiting headers)", err),
timeout: true,
}
}
@ -969,7 +969,7 @@ func (b *cancelTimerBody) Read(p []byte) (n int, err error) {
}
if b.reqDidTimeout() {
err = &httpError{
err: err.Error() + " (Client.Timeout or context cancellation while reading body)",
err: fmt.Errorf("%w (Client.Timeout exceeded or context cancellation while reading body)", err),
timeout: true,
}
}

19
src/net/http/client_test.go
View File

@ -2127,3 +2127,22 @@ func testProbeZeroLengthBody(t *testing.T, mode testMode) {
t.Fatalf("server got body %q, want %q", gotBody, content)
}
}
func TestClientTimeoutReturnsContextDeadlineExceeded(t *testing.T) {
run(t, testClientTimeoutReturnsContextDeadlineExceeded)
}
func testClientTimeoutReturnsContextDeadlineExceeded(t *testing.T, mode testMode) {
doneCh := make(chan struct{})
defer close(doneCh)
cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {
<-doneCh
w.WriteHeader(200)
}))
// check that, upon exceeding Client.Timeout, the returned error is context.DeadlineExceeded.
cst.c.Timeout = 1 * time.Millisecond
req, _ := NewRequest("GET", cst.ts.URL, nil)
_, err := cst.c.Do(req)
if !errors.Is(err, context.DeadlineExceeded) {
t.Fatalf("expected context.DeadlineExceeded, got %v", err)
}
}

8
src/net/http/transport.go
View File

@ -2556,15 +2556,17 @@ type writeRequest struct {
}
type httpError struct {
err string
err error
timeout bool
}
func (e *httpError) Error() string { return e.err }
func (e *httpError) Error() string { return e.err.Error() }
func (e *httpError) Timeout() bool { return e.timeout }
func (e *httpError) Temporary() bool { return true }
func (e *httpError) Is(target error) bool { return errors.Is(e.err, target) }
func (e *httpError) Unwrap() error { return e.err }
var errTimeout error = &httpError{err: "net/http: timeout awaiting response headers", timeout: true}
var errTimeout error = &httpError{err: errors.New("net/http: timeout awaiting response headers"), timeout: true}
// errRequestCanceled is set to be identical to the one from h2 to facilitate
// testing.