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x/net/http2: The starting streamid for client should be 3 instead of 1 when AllowHTTP is set. #25230

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snowie2000 opened this issue May 3, 2018 · 3 comments
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x/net/http2: The starting streamid for client should be 3 instead of 1 when AllowHTTP is set. #25230

snowie2000 opened this issue May 3, 2018 · 3 comments
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FrozenDueToAge help wanted NeedsFix The path to resolution is known, but the work has not been done.
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Unreleased

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@snowie2000
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Please answer these questions before submitting your issue. Thanks!

What version of Go are you using (go version)?

1.10

Does this issue reproduce with the latest release?

yes

What operating system and processor architecture are you using (go env)?

W64

transport.go line 537:
nextStreamID: 1,
as http2-spec stated in https://http2.github.io/http2-spec/#discover-http

Stream 1 is implicitly "half-closed" from the client toward the server (see Section 5.1), since the request is completed as an HTTP/1.1 request. After commencing the HTTP/2 connection, stream 1 is used for the response.

and https://http2.github.io/http2-spec/#StreamIdentifiers

HTTP/1.1 requests that are upgraded to HTTP/2 (see Section 3.2) are responded to with a stream identifier of one (0x1). After the upgrade completes, stream 0x1 is "half-closed (local)" to the client. Therefore, stream 0x1 cannot be selected as a new stream identifier by a client that upgrades from HTTP/1.1.

The next stream ID for h2c should therefore starts from 3
@gopherbot gopherbot added this to the Unreleased milestone May 3, 2018
@snowie2000 snowie2000 changed the title x/http2: The starting streamid for client should be 3 instead of 1 when AllowHTTP is set. x/net/http2: The starting streamid for client should be 3 instead of 1 when AllowHTTP is set. May 4, 2018
@bradfitz
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bradfitz commented May 4, 2018

Sounds fine to start at 3 instead of 1 iff AllowHTTP is true. Somebody want to send a change?

@bradfitz bradfitz added help wanted NeedsFix The path to resolution is known, but the work has not been done. labels May 4, 2018
@wingyplus
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I can do this.

@gopherbot
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Change https://golang.org/cl/111835 mentions this issue: x/net/http2: set nextStreamID to 3 when AlloHTTP is set

@golang golang locked and limited conversation to collaborators May 7, 2019
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@bradfitz @wingyplus @gopherbot @snowie2000